power electronics presentation ppt

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• Electronics

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AC = alternate current DC = direct current

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Chapter 1 INTRODUCTION TO POWER ELECTRONICS SYSTEMS

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Presentation on theme: "Chapter 1 INTRODUCTION TO POWER ELECTRONICS SYSTEMS"— Presentation transcript:

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Introduction to Power Electronics

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CONTENTS CHAPTER ONE 3 1 Introduction to power electronic switching devices 3 1.1 Classifications of Power Switches 4 1.1.1 Uncontrolled switch 5 1.1.2 Semi-controlled switch 5 1.1.3 Controlled switch 5 CHAPTER TWO 6 2 Uncontrolled Switches 6 2.1 Introduction to Diodes 6 2.1.1 Characteristics of diode 6 2.1.2 Switching capabilities of diode 8 2.2 Power Diode Types 9 2.2.1 General-purpose diodes 10 2.2.2 Fast-recovery diodes 11 2.2.3 Applications of Fast-recovery diodes 12 2.2.4 Schottky diode 13 2.2.5 Applications of Schottky diodes 15 CHAPTER THREE 16 3 Semi-controlled switch 16 3.1 Silicon-Controlled Rectifier (SCR) 16 3.1.1 Constructional details 17 3.1.2 Equivalent Circuit of SCR 17 3.1.3 V-I Characteristics of SCR 18 3.1.4 Applications of SCR 19 3.2 Gate turn-off thyristors (GTO) 19 3.2.1 GTO operating principle 20 3.2.2 V-I Characteristics of Gate Turn-Off Thyristor 21 3.2.3 Gate Turn-Off Thyristor Applications 22 3.3 MOS – Controlled Thyristor (MCT) 22 3.3.1 The equivalent circuit of the MCT 23 3.3.2 Advantages of MCT 24 CHAPTER FOUR 25 4 Controlled switching devices 25 4.1 The Bipolar Junction Transistor as a switch 25 4.2 The Metal Oxide Semiconductor Field Effect Transistor 27 4.3 The Insulated Gate Bipolar Transistor 28 5 References 31

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Power Electronics - PowerPoint PPT Presentation

Power Electronics

The primary task of power electronics is to process and control the flow of ... magnetic levitation. electric vehicles. automotive electronics. ship power systems ... – powerpoint ppt presentation.

• College of Automation and Electronic Engineering
• Qingdao University of Science and Technology
• Introduction
• Chapter 1 Power Electronic Devices
• What is power electronics?
• The history
• Applications
• About this course
• 1) Definition
• Power Electronics is the electronics applied to conversion and control of electric power.
• Range of power scale
• milliwatts(mW) megawatts(MW) gigawatts(GW)
• A more exact explanation
• The primary task of power electronics is to process and control the flow of electric energy by supplying voltages and currents in a form that is optimally suited for user loads.
• Conversion of electric power
• Other names for electric
• power converter
• -Power converter
• -Switching converter
• -Power electronic circuit
• -Power electronic converter
• Power electronic system
• Generic structure of a power electronic system
• Control is invariably required.Power converter along with its controller including the corresponding measurement and interface circuits, is also called power electronic system.
• A typical power electronic system
• The task of power electronics has been recently extended to also ensuring the currents and power consumed by power converters and loads to meet the requirement of electric energy sources.
• A Classification of electronics by processing object
• Other classifications of electronics
• 3) The interdisciplinary nature
• William E. Newells description
• Power electronics is the interface between electronics and power.
• Relation with multiple disciplines
• Power electronics is currently the most active discipline in electric power engineering.
• Electric power is used in almost every part and everywhere of modern human society.
• Electric power is the major form of energy source used in modern human society.
• The objective of power electronics is right on how to use electric power, and how to use it effectively and efficiently, and how to improve the quality and utilization of electric power.
• Power electronics and information electronics make two poles of modern technology and human society information electronics is the brain, and power electronics is the muscle.
• Industrial applications
• Motor drives
• Electrolysis
• Electroplating
• Induction heating
• Arc furnaces and ovens
• Transportation applications
• Trains locomotives
• Trolley buses
• Magnetic levitation
• Electric vehicles
• Automotive electronics
• Ship power systems
• Aircraft power systems
• Utility stems applications
• High- voltage dc transmission(HVDC)
• Flexible ac transmission(FACTS)
• Static var compensation harmonics
• suppression TCR, TSC, SVG, APF
• Custom power power quality control
• Supplemental energy sources
• wind, photovoltaic, fuel cells
• Energy storage systems
• Power supplies for electronic equipment
• Telecommunications
• Office equipment
• Electronic instruments
• Portable or mobile
• electronics
• Residential and home appliances
• Air conditioning
• Refrigeration freezers
• Entertaining
• Applications in space technology
• Spaceship power systems
• Satellite power systems
• Space vehicle power systems
• Other aplications
• Nuclear reactor control
• Power systems for particle accelerators
• Environmental engineering
• It is estimated that in developed countries now 60 of the electric energy goes through some kind of power electronics converters before it is finally used.
• Power electronics has been making major contributions to
• --better performance of power supplies and better control of electric equipment
• --energy saving
• --environment protection
• reduction of energy consumption leads to less pollution
• reduction of pollution produced by power converters
• direct applications to environment protection technology
• A simple dc-dc converter example
• Input source100V
• Output load50V, 10A, 500W
• How can this converter be realized?
• Dissipative realization
• Resistive voltage divider
• Series pass regulator
• transistor operates in active region
• Use of a SPDT switch
• The switch changes the dc voltage level
• Addition of low pass filter
• Addition of (ideally lossless) L- C low- pass filter, for removal of switching harmonics
• Choose filter cutoff frequency f0 much smaller than switching frequency fs.
• This circuit is known as the buck converter.
• Addition of control system for regulation of output voltage
• Major issues in power electronics
• How to meet the requirement of the load or gain better control of the load
• How to improve the efficiency
• -- for reliable operation of power semiconductor devices
• -- for energy saving
• How to realize power conversion with less volume, less weight, and less cost.
• How to reduce negative influence to other equipment in the electric power system and to the electromagnetic environment.
• Three parts of the content

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How-To Geek

6 ways to create more interactive powerpoint presentations.

Engage your audience with cool, actionable features.

Quick Links

• Add a QR code
• Embed Microsoft Forms (Education or Business Only)
• Embed a Live Web Page
• Add Links and Menus
• Add Clickable Images to Give More Info
• Add a Countdown Timer

We've all been to a presentation where the speaker bores you to death with a mundane PowerPoint presentation. Actually, the speaker could have kept you much more engaged by adding some interactive features to their slideshow. Let's look into some of these options.

1. Add a QR code

Adding a QR code can be particularly useful if you want to direct your audience to an online form, website, or video.

Some websites have in-built ways to create a QR code. For example, on Microsoft Forms , when you click "Collect Responses," you'll see the QR code option via the icon highlighted in the screenshot below. You can either right-click the QR code to copy and paste it into your presentation, or click "Download" to add it to your device gallery to insert the QR code as a picture.

In fact, you can easily add a QR code to take your viewer to any website. On Microsoft Edge, right-click anywhere on a web page where there isn't already a link, and left-click "Create QR Code For This Page."

You can also create QR codes in other browsers, such as Chrome.

You can then copy or download the QR code to use wherever you like in your presentation.

2. Embed Microsoft Forms (Education or Business Only)

If you plan to send your PPT presentation to others—for example, if you're a trainer sending step-by-step instruction presentation, a teacher sending an independent learning task to your students, or a campaigner for your local councilor sending a persuasive PPT to constituents—you might want to embed a quiz, questionnaire, pole, or feedback survey in your presentation.

In PowerPoint, open the "Insert" tab on the ribbon, and in the Forms group, click "Forms". If you cannot see this option, you can add new buttons to the ribbon .

As at April 2024, this feature is only available for those using their work or school account. We're using a Microsoft 365 Personal account in the screenshot below, which is why the Forms icon is grayed out.

Then, a sidebar will appear on the right-hand side of your screen, where you can either choose a form you have already created or opt to craft a new form.

Now, you can share your PPT presentation with others , who can click the fields and submit their responses when they view the presentation.

3. Embed a Live Web Page

You could always screenshot a web page and paste that into your PPT, but that's not a very interactive addition to your presentation. Instead, you can embed a live web page into your PPT so that people with access to your presentation can interact actively with its contents.

To do this, we will need to add an add-in to our PPT account .

Add-ins are not always reliable or secure. Before installing an add-in to your Microsoft account, check that the author is a reputable company, and type the add-in's name into a search engine to read reviews and other users' experiences.

To embed a web page, add the Web Viewer add-in ( this is an add-in created by Microsoft ).

Go to the relevant slide and open the Web Viewer add-in. Then, copy and paste the secure URL into the field box, and remove https:// from the start of the address. In our example, we will add a selector wheel to our slide. Click "Preview" to see a sample of the web page's appearance in your presentation.

This is how ours will look.

When you or someone with access to your presentation views the slideshow, this web page will be live and interactive.

4. Add Links and Menus

As well as moving from one slide to the next through a keyboard action or mouse click, you can create links within your presentation to direct the audience to specific locations.

To create a link, right-click the outline of the clickable object, and click "Link."

In the Insert Hyperlink dialog box, click "Place In This Document," choose the landing destination, and click "OK."

What's more, to make it clear that an object is clickable, you can use action buttons. Open the "Insert" tab on the ribbon, click "Shape," and then choose an appropriate action button. Usefully, PPT will automatically prompt you to add a link to these shapes.

You might also want a menu that displays on every slide. Once you have created the menu, add the links using the method outlined above. Then, select all the items, press Ctrl+C (copy), and then use Ctrl+V to paste them in your other slides.

5. Add Clickable Images to Give More Info

Through PowerPoint's animations, you can give your viewer the power to choose what they see and when they see it. This works nicely whether you're planning to send your presentation to others to run through independently or whether you're presenting in front of a group and want your audience to decide which action they want to take.

Start by creating the objects that will be clickable (trigger) and the items that will appear (pop-up).

Then, select all the pop-ups together. When you click "Animations" on the ribbon and choose an appropriate animation for the effect you want to achieve, this will be applied to all objects you have selected.

The next step is to rename the triggers in your presentation. To do this, open the "Home" tab, and in the Editing group, click "Select", and then "Selection Pane."

With the Selection Pane open, select each trigger on your slide individually, and rename them in the Selection Pane, so that they can be easily linked to in the next step.

Finally, go back to the first pop-up. Open the "Animations" tab, and in the Advanced Animation group, click the "Trigger" drop-down arrow. Then, you can set the item to appear when a trigger is clicked in your presentation.

If you want your item to disappear when the trigger is clicked again, select the pop-up, click "Add Animation" in the Advanced Animation group, choose an Exit animation, and follow the same step to link that animation to the trigger button.

6. Add a Countdown Timer

A great way to get your audience to engage with your PPT presentation is to keep them on edge by adding a countdown timer. Whether you're leading a presentation and want to let your audience stop to discuss a topic, or running an online quiz with time-limit questions, having a countdown timer means your audience will keep their eye on your slide throughout.

To do this, you need to animate text boxes or shapes containing your countdown numbers. Choose and format a shape and type the highest number that your countdown clock will need. In our case, we're creating a 10-second timer.

Now, with your shape selected, open the "Animations" tab on the ribbon and click the animation drop-down arrow. Then, in the Exit menu, click "Disappear."

Open the Animation Pane, and click the drop-down arrow next to the animation you've just added. From there, choose "Timing."

Make sure "On Click" is selected in the Start menu, and change the Delay option to "1 second," before clicking "OK."

Then, with this shape still selected, press Ctrl+C (copy), and then Ctrl+V (paste). In the second box, type 9 . With the Animation Pane still open and this second shape selected, click the drop-down arrow and choose "Timing" again. Change the Start option to "After Previous," and make sure the Delay option is 1 second. Then, click "OK."

We can now use this second shape as our template, as when we copy and paste it again, the animations will also duplicate. With this second shape selected, press Ctrl+C and Ctrl+V, type 8 into the box, and continue to do the same until you get to 0 .

Next, remove the animations from the "0" box, as you don't want this to disappear. To do this, click the shape, and in the Animation Pane drop-down, click "Remove."

You now need to layer them in order. Right-click the box containing number 1, and click "Bring To Front." You will now see that box on the top. Do the same with the other numbers in ascending order.

Finally, you need to align the objects together. Click anywhere on your slide and press Ctrl+A. Then, in the Home tab on the ribbon, click "Arrange." First click "Align Center," and then bring the menu up again, so that you can click "Align Middle."

Press Ctrl+A again to select your timer, and you can then move your timer or copy and paste it elsewhere.

Press F5 to see the presentation in action, and when you get to the slide containing the timer, click anywhere on the slide to see your countdown timer in action!

Now that your PPT presentation is more interactive, make sure you've avoided these eight common presentational mistakes before you present your slides.

5 Free Alternatives To Microsoft PowerPoint

M icrosoft PowerPoint has always been the default choice for creating professional meeting briefs or fun little project demonstrations in schools. Its inclusion as a free service for students or working professionals makes it a no-brainer to use. However, for the general public, it can get quite expensive to pay for a subscription just to be able to create simple presentation slides. Although you can subscribe to Microsoft's Office Suite and get more bang for your buck, the pricing still doesn't hit the affordable range for most. 

Fortunately, completion has been growing, and a sea of strong contenders offer similar services to PowerPoint. After considering feature sets, here are five of the best free alternatives to Microsoft PowerPoint. At the end of the article, you can find a detailed explanation of why we've chosen the services, alongside useful comparisons that may help you make your decision easier.

Read more: The 20 Best Mac Apps That Will Improve Your Apple Experience

When it comes to productivity apps, Zoho makes some of the better ones in the market. Zoho Sheet, for example, is one of the best Microsoft Excel alternatives out there  —  owing to its extensive product catalog, there is a great way to view and edit presentations. The aptly named Zoho Show lets you design and demonstrate professional-looking slides, all without having to download the program.

Zoho takes a minimal approach to most of its services, and its PowerPoint application is no different. You'll find that most menus are contextually aware of what tasks you're currently performing, which helps keep unnecessary tools out of the way and bring the important ones in focus. There is also a huge library of customizable templates you can choose from, making it easier to kickstart your presentation work. 

Zoho Show is completely free to use for individuals and offers unlimited cloud storage. No features are locked behind a paywall, and rest assured, you can fully rely on this online presentation-making tool for all your needs, be it for school or work. 

Canva is a service that can easily climb up to becoming everyone's favorite once they start using it. While most applaud it for its graphic designing prowess, there are many other things Canva can do that you probably aren't aware of . Among them is the ability to craft beautiful slides for your presentations and projects. 

By creating a free account, you can access thousands of templates on Canva. You can filter these by use case—maybe you need one for a professional business briefing or a casual one explaining why your pet dog is the best canine. There is a whole section of ready-to-use templates dedicated to mobile-friendly viewing as well, which is something you don't usually find to be as accessible with other tools. 

Like most presentation apps, Canva lets you collaborate with your team members and work across devices seamlessly. The Canva app for mobile also lets you control your slides remotely during your presentation. Some menus also feature AI-featured tools to add one-click enhancements to your slides -- unfortunately, these are locked behind premium subscription tiers. However, for the cent percent of the population, Canva can be used without spending a dime to meet a plethora of creative needs. 

Apple takes great pride in developing in-house solutions to meet every user requirement. While most of its products dominate the competition in popularity, the same cannot be said for Keynote , the company's version of Microsoft PowerPoint. The program was first released in 2003 with macOS Big Sur and has largely remained one of those icons you glance over and forget about. 

However, recent versions of Keynote have made it a compelling alternative to PowerPoint. Not only is it pre-installed on every Apple device, including your iPhone, but it also works best with the iPad touchscreen. Keynote has a largely clean and professional approach to the built-in templates, but nothing is stopping you from going creative. Animations are one of Keynote's strongest suits, allowing you to create near cinematic-looking presentations with just a few clicks. 

While you can still use Apple Keynote through iCloud on Windows devices, this alternative is clearly meant for people surrounded by the walled garden of Apple technology. It makes use of features like AirDrop, Live Photos, and VoiceOver  — all of which are technologies available across Apple devices. Using Apple Keynote is completely free, and the app has easy exporting tools that make working with Microsoft PowerPoint less of a hassle.

WPS Presentation

WPS Office makes some of the best solutions for creating and editing documents on smartphones , but their service offerings extend to Windows, macOS, and even Linux. WPS Presentation is perhaps the closest you'll get to Microsoft PowerPoint in terms of the user interface and how most tools are bundled in familiar locations.

This PowerPoint app offers real-time collaboration where you can invite your team members and work on the same document remotely. Like most collaboration tools, users can leave comments to suggest changes or add information for other people on the team.

WPS Presentation is not the only free product; you can utilize every app in the WPS Office suite. Unlike most competitors, you don't need to download or use a separate mini-app to make presentations. WPS Office has a document editor, PowerPoint creator, spreadsheet manager, and other tools all within its umbrella. Premium plans for this service exist, but they mostly cater to unlocking features for editing PDFs. 

Google Slides

As a netizen, you most likely already have a Google account. Not only is it required to make any meaningful use of your Android phone, but popular services that we take for granted, like Gmail and Drive, all fall under Google's umbrella. One such free service that the tech giant has at its disposal is Google Slides . While the barebones UI might seem lackluster at first, Slides has nearly the same level of functionality as Microsoft PowerPoint and can even be supercharged by add-ons. 

All of Google's workspace apps, such as Docs, Sheets, and Slides, provide an intuitive way to work in a team. You can add comments, use annotations, and share the presentation with limited access to others. You can use one of the many predesigned Google Slides templates for simple presentations , or browse for templates that cater to specific needs. Being part of a bigger service catalog has its obvious advantages, such as seamless integration with Google Meet, Gmail, and other products from Google that you already use. 

We recommend Google Slides to anyone who needs to create and edit PowerPoint presentations on the go and can't be bothered with working in a complicated environment. The service is also available as an app for Android and iOS, and you can export your presentations in a wide range of formats, including PPT, PDF, or PNG for individual slides. 

To Pay Or Not To Pay?

You'll notice that all the services we've mentioned on this list are free to use. In fact, you can use Office 365 apps online for free   — including PowerPoint, which makes purchasing a standalone subscription to the Microsoft PowerPoint app quite redundant. However, nearly every free alternative here short of Keynote also offers premium plans, but should you consider buying one?

For the vast majority of people who are looking for a robust software to create, edit, and share presentations with  —  these free options deliver exceptionally well in every aspect. Some apps like Google Slides and Apple Keynote let you work in smaller teams with the free tier as well. Apps like WPS Office and Canva tend to lock new and exciting features like AI tools behind a paywall, and while these are nice to have, you definitely can do without them. 

If you're looking for a presentation tool for a company with multiple people, you can scale up using any of the alternatives mentioned on this list. Both Google Workspace and Zoho offer reliable and enterprise-level plans you can upgrade to. For everyone else  — enjoy creating and demonstrating your PowerPoint presentations for free.

Read the original article on SlashGear .

POWER ELECTRONICS

Jan 05, 2020

1.82k likes | 3k Views

POWER ELECTRONICS. CIRCUITS, DEVICES, AND APPLICATIONS Eng.Mohammed Alsumady. Relationship of Power Electronics. POWER ELECTRONICS TECHNOLOGY. As the technology for the power semiconductor devices and integrated circuit develops, the potential for applications of power electronics become

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Presentation Transcript

POWER ELECTRONICS CIRCUITS, DEVICES, AND APPLICATIONS Eng.Mohammed Alsumady

Relationship of Power Electronics

POWER ELECTRONICS TECHNOLOGY • As the technology for the power semiconductor devices and integrated circuit develops, the potential for applications of power electronics become wider. There are already many power semiconductor devices that are commercially available, however, the development in this direction is continuing. • The power semiconductor devices or power electronic converter fall generally into four categories : -AC to DC Converter (Controlled Rectifier) -DC to DC Converter (DC Chopper) -AC to AC Converter (AC voltage regulator) -DC to AC Converter (Inverter) •  The design of power electronics converter circuits requires design the power and control circuits. The voltage and current harmonics that are generated by the power converters can be reduced or minimized with a proper choice of the control strategy.

Power Electronics Application • Power Electronics defined as the application of solid-state (devices) electronics for the control and conversion of electric power. • Power electronics have already found an important place in modern technology and are now used in a great variety of high-power product, including heat controls, light controls, electric motor control, power supplies, vehicle propulsion system and high voltage direct current (HVDC) systems.

POWER ELECTRONIC SWITCHING DEVICES 1.Uncontrolled turn on and off (Power Diode) 2.Controlled turn on uncontrolled turn off (Thyristors) 3.Controlled turn on and off characteristic (Power Transistor, BJT, MOSFET, GTO, IGBT) 4.Continuous gate signal requirement (BJT, MOSFET, IGBT) 5.Pulse gate requirement (SCR(Silicon-Controlled Rectifier) , GTO) 6.Bidirectional current capability (TRIAC) 7.Undirectionalcurrent capability (SCR, GTO, BJT, MOSFET, IGBT)

Diagram Block of Converters

Diode Rectifiers. A diode rectifier circuit converts AC voltage into a fixed DC voltage. The input voltage to rectifier could be either single phase or three phase. • AC to DC Converters. An AC to DC converter circuit can convert AC voltage into a DC voltage. The DC output voltage can be controlled by varying the firing angle of the thyristors. The AC input voltage could be a single phase or three phase. • AC to AC Converters. This converters can convert from a fixed ac input voltage into variable AC output voltage. The output voltage is controlled by varying firing angle of TRIAC. These type converters are known as AC voltage regulators. • DC to DC Converters . These converters can converte a fixed DC input voltage into variable DC voltage or vice versa. The DC output voltage is controlled by varying of duty cycle.

Examples of Some Applications

History of Power Electronics

Types of Power Devices

General Purposes Diodes

Power Ratings of Devices

Ratings of Power Devices

Devices Symbols and Characteristics

Applications of Power Devices

Control Characteristics of Devices

Switching Characteristics

Ideal Characteristics Ideal Characteristics

Voltage and Current Waveforms

Diode Rectifiers

Ac-dc Converter • AC to DC Converters -Single phase, half wave AC to DC converter Input voltage Waveform of single-phase, half wave AC to DC converter α Output average voltage : rms value of Output voltage :

AC-DC Converter

1. AC to DC Converters -Single phase, Full wave AC to DC converter The average output voltage can be found from :

AC to DC ConvertersSingle phase, Full wave AC to DC converter

3 Phase Half-Wave Uncontrolled Rectifier with Inductive Load

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بسم الله الرحمن الرحيم. The Islamic University of Gaza Faculty of Engineering Electrical Engineering Department. POWER ELECTRONICS . EELE 5450 — Summer 2012 . Instructor: Eng. Jalal Al Roumy. Lecture 15. Chapter six. DC Choppers and DC motor Control.

186 views • 7 slides

بسم الله الرحمن الرحيم. The Islamic University of Gaza Faculty of Engineering Electrical Engineering Department. POWER ELECTRONICS . EELE 5450 — Summer 2012. Instructor: Eng. Jalal Al Roumy. Lecture 17. HALF-BRIDGE WITH RESISTIVE LOAD.

306 views • 20 slides

بسم الله الرحمن الرحيم. The Islamic University of Gaza Faculty of Engineering Electrical Engineering Department. POWER ELECTRONICS . EELE 5450 — Summer 2012. Instructor: Eng. Jalal Al Roumy. Lecture 13. Chapter Five. AC Line Voltage Control.

356 views • 11 slides

Power Electronics. Power amplifiers. Figure 12.1-2. Thermodynamic context of power amplifier . Figure 12.1–2. Thermal resistances. . Figure 12.1–2 Maximum power hyperbolae for power transistors .

448 views • 19 slides

بسم الله الرحمن الرحيم. The Islamic University of Gaza Faculty of Engineering Electrical Engineering Department. POWER ELECTRONICS . EELE 5450 — Summer 2012. Instructor: Eng. Jalal Al Roumy. Lecture 20. AUXILIARY IMPULSE COMMUTATED INVERTER.

309 views • 14 slides

بسم الله الرحمن الرحيم. The Islamic University of Gaza Faculty of Engineering Electrical Engineering Department. POWER ELECTRONICS . EELE 5450 — Summer 2012. Instructor: Eng. Jalal Al Roumy. Lecture 19. AUXILIARY IMPULSE COMMUTATED INVERTER.

334 views • 16 slides

11. Power Electronics. Device. Device symbol. i. D. Diode. A. K. +. –. v. AK. i. G. Thyristor. A. A. K. i. G. Gate turn-off. thyristor. (GTO). A. A. K. G. Triac. i. A. A. K. C. npn . BJT. B. E. C. IGBT. G. E. D. n. -channel. MOSFET. G. S.

647 views • 34 slides

بسم الله الرحمن الرحيم. The Islamic University of Gaza Faculty of Engineering Electrical Engineering Department. POWER ELECTRONICS . EELE 5450 — Summer 2012. Instructor: Eng. Jalal Al Roumy. Lecture 18. HALF-BRIDGE WITH AN R-L LOAD.

251 views • 13 slides

Power Electronics. Battery Charging System Supplying Power to Ink. Choosing the Battery. Battery Type has to first be chosen. “Batteries and Charge Control for Stand-Alone Photovoltaic Systems : Fundamentals and Applications” , James P. Dunlop. Battery Capacity.

292 views • 9 slides

بسم الله الرحمن الرحيم. The Islamic University of Gaza Faculty of Engineering Electrical Engineering Department. POWER ELECTRONICS. EELE 5450 — spring 2011. Instructor: Eng.Moayed N. EL Mobaied. Lecture 1. Syllabus. Instructor: Moayed N. Almobaied, Msc.

572 views • 22 slides

بسم الله الرحمن الرحيم. The Islamic University of Gaza Faculty of Engineering Electrical Engineering Department. POWER ELECTRONICS. EELE 5450 — Fall 2009-2010. Instructor: Eng.Moayed N. EL Mobaied. Lecture 29. Power switches. Power Semiconductor Devices.

556 views • 29 slides

بسم الله الرحمن الرحيم. The Islamic University of Gaza Faculty of Engineering Electrical Engineering Department. POWER ELECTRONICS. EELE 5450 — Summer 2012. Instructor: Eng . Jalal Al Roumy. Lecture 14. Chapter Five. Full-wave controller With Inductive Load.

205 views • 12 slides

بسم الله الرحمن الرحيم. The Islamic University of Gaza Faculty of Engineering Electrical Engineering Department. POWER ELECTRONICS. EELE 5450 — Fall 2009-2010. Instructor: Eng.Moayed N. EL Mobaied. Lecture 16. Chapter six. DC Choppers and DC motor Control.

188 views • 7 slides

Power Electronics. Chapter 8 Soft-Switching Techniques. Pursuing of higher switching frequency. Better waveform PWM waveform will be closer to expected waveform Harmonics is easier to be filtered. Benefits. Smaller volume and weight 4.44 fN f =4.44 fNAB.

737 views • 21 slides

POWER ELECTRONICS. CIRCUITS, DEVICES, AND APPLICATIONS Eng.Mohammed Alsumady. EPE 352 POWER ELECTRONICS. DC-DC CONVERTERS. 11/15/2014. 2. Step Down Converter. Constant frequency operation Variable frequency operation. 11/15/2014. 3. PWM Waveform Generation.

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Power Electronics. Unit V. Prof. V. N. Bhonge. Dept. of Electronics & Telecomm. Shri Sant Gajanan Maharaj College of Engg,. Shegaon – 444203. [email protected]. SSGMCE Shegaon. Unit V

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DinoFire USB Type C Wireless Presenter Remote Presentation Clicker,Volume Control PowerPoint Clicker with Red Pointer Long Range PPT Slide Advancer for Mac Laptop PC Computer

AAA-USB A/C

Purchase options and add-ons

• 【USB-A & USB-C 2 in 1 Presentation Remote】The wireless presenter clicker features both USB-A and USB-C connections, allowing it to suitable for different types of device,such as macbook,laptop,pc.
• 【Functional Clicker for Presentations】The remote control for powerpoint presentations combines the features of page forward/backward, volume control, switch windows, full/black screen, hyperlink. Plug and play，it doesn’t require any drivers.(For Mac users, you may need to complete an simple set-up first)
• 【Bright Red Light & Long Control Range】The usb c presentation clicker with a bright light is easy to highlight your points and draw audience's attenion (Not recommended for LED, LCD screens).It is a efficient basic presentation essentials to use in class or conference.Wireless Presenter Remote control range: 98-165FT, Red light range: 328FT.
• 【Easy to carry】Usb receiver is conveniently stored inside the back of presenter near to compartment, making it easy to carry and avoid to loss when you're done using it.Its compact build, shape and pen clip design allow the ease of carrying on pocket or briefcase slot.

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• presenter with receiver

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Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them.

To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzed reviews to verify trustworthiness.

Customers say

Customers like the brightness, performance, charging, and value of the remote control. They mention that the laser pointer is bright and easy to see, works well for presentations, and is rechargeable. They appreciate the versatility, and ease of use. That said, opinions are mixed on connectivity and quality.

AI-generated from the text of customer reviews

Customers like the performance of the remote control. They say it works well, is efficient, and works all around their room. Some say it's a nearly perfect device and a great value. It works great in wireless mode, but some bought it for the Bluetooth because their computer. The laser light works great, and is an awesome productivity tool. It also works seamlessly with Google Slides and is automatically recognized in Windows 11. The page-turner function is still reliable.

"...This remote is compact and functional . Making the wireless connection between the remote and my computer was completely straightforward...." Read more

"Great wireless presenter. Works well . Love that it is rechargeable. Can connect to device with Bluetooth or USB." Read more

"...Even now, the page-turner function is still reliable , but the pointer starts flashing the "battery low" warning after just a minute or 2...." Read more

"some of the features (like opening a hyperlink) do not work on Google Slides with a Mac. But most importantly there is NO POWER SWITCH!..." Read more

Customers like the ease of use of the remote control. They mention that it is easy to use, convenient, and easy to set up. The controls are simple and uncluttered. The laser is bright and has no difficulty showing up on the projected screen. It makes doing presentations easier in that they can walk around.

"...wireless connection between the remote and my computer was completely straightforward ...." Read more

"...It is easy to set up , easy to use, and easy to quickly stow using the clip...." Read more

"...If you are near the USB Fob, this is an excellent device - easy to hold , easy to use. It didn't work great for my use case though." Read more

"This was a great buy very convenient but began glitching after a while." Read more

Customers like the value of the remote control. They say it's well worth the investment, sturdy for the price point, and has an amazing battery life.

"... Great value . Just remember to remove the battery when not using, I’ve gone through quite a few." Read more

"... Great value for the money !" Read more

"...PROS- small, compact size- reasonable price - allows for movement during your presentation-..." Read more

"...What a waste of money : Now all I have is a not-very-useful laser pointer. Waste of money." Read more

Customers like the brightness of the remote control. They mention that the laser pointer is bright and easy to see, and the green light is bright enough to spot in LED monitor. They also say that the remote is an inexpensive and simple laser point and controller for PowerPoint. Customers also mention that it's a great asset since they can use it in assemblies to get students. They say that it has a built-in laser that lets them tease the cat.

"The green laser is bright enough to show up on TV screens...." Read more

"...This pointer was a sufficient brightness that it was easy to see, but not so bright as to be distracting...." Read more

"...The only draw back is the laser is bright green . So it’s brighter than it needs to be." Read more

"...lightweight, rechargeable, solid, and the one I bought has a bright green laser pointer (which I prefer over red)...." Read more

Customers find the remote control helpful for presentations, a great teaching tool, and perfect for the classroom. They also say it works well to present lessons and makes teaching easier.

"Works great and is perfect for a classroom !" Read more

"...It’s awesome to work in small groups and still click PowerPoints or just be mobile and not tethered to my mouse! Get it and thank me later!" Read more

"I absolutely love this lil gadget!!! It is so easy to use and very handy ...." Read more

"...The laser, while not the brightest, works for the classroom . It also has a volume adjuster on one side...." Read more

Customers like the charging of the remote control. They say it is rechargeable, so they don't need to worry about buying batteries. They also mention that it comes charged and ready to use, and that the re-charge feature is really great to use.

"...Comes with on/off switch, built-in rechargeable battery , volume control, tabs for PowerPoint" Read more

"Great wireless presenter. Works well. Love that it is rechargeable . Can connect to device with Bluetooth or USB." Read more

"...It is lightweight, rechargeable , solid, and the one I bought has a bright green laser pointer (which I prefer over red)...." Read more

"...for the brightness of the laser, the concealability, and the rechargeability ...." Read more

Customers are mixed about the connectivity of the remote control. Some mention that it connects right away via Bluetooth and via USB, and it reaches throughout their classroom. However, others say that it goes to sleep and seems to lose its Bluetooth connection. It's not easy to connect via Bluetooth the first time and it takes a few tries.

" Great wireless presenter . Works well. Love that it is rechargeable. Can connect to device with Bluetooth or USB." Read more

"...Unfortunately, bluetooth does not work . It will connect to the PC but does not do anything" Read more

"...This remote has excellent range from just about anywhere in my lab...." Read more

"...it goes to sleep and seems to lose its bluetooth connection ...." Read more

Customers are mixed about the quality of the remote control. Some mention it's well-made, reliable, and easy to use. However, others say it'll fall apart and feel like a cheap plastic toy.

"...It is lightweight, rechargeable, solid , and the one I bought has a bright green laser pointer (which I prefer over red)...." Read more

"...I have had no issues until now. My usb plug fell apart today … right before an important unit I am starting tomorrow...." Read more

"...a great deal to focus on specific things on my slides: the red beam is very strong and easily visible to my students. Great value for the money!" Read more

"...It does a great job, but feels like a cheap plastic toy that might shatter to bits if you accidentally drop it...." Read more

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