EE Power Electronics – Lecture Notes (All Units) – Edition. Anna University. Department of Electrical & Electronics Engineering. Anna University Regulation EEE EE PE Notes, Power Electronics Lecture Handwritten Notes for all 5 units are provided below. POWER ELECTRONICS DEVICES Characteristics of power devices – characteristics of SCR, diac, triac, SCS, GTO, PUJT – power transistors – power FETs.

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Also known as dc-to-dc converter. Nasar Electric Drives. My presentations Profile Feedback Log out. In step down chopper output voltage is less than input voltage. If the load voltage is volts, calculate the conduction period of the thyristor in each cycle.

When thyristor is ON, supply voltage appears across the load When thyristor is OFF, the voltage across the load will be zero. About project SlidePlayer Terms of Service. The thyristor in the circuit acts as a switch.

Step-up chopper is used to obtain a load voltage higher than the input voltage V. The values of L and C are chosen depending upon the requirement of output voltage and current. Current flows from supply to load. Ripple in the load current depends inversely on the chopping frequency, f. Share buttons are a little bit lower.


Step up choppers are used for regenerative braking of dc motors. Auth with social network: How does a buck converter operate?


Widely used for motor control. The current tends to decrease resulting in reversing the polarity of induced EMF in L.

M Buck Converter Objective is to answer the following questions: When chopper is ON, its voltage drop is 2 V and the chopping frequency is 1 kHz. Malvino chapter 3, Next: Published by Myrtle Dickerson Modified about 1 year ago. Thyristor converter offers greater efficiency, faster response, lower maintenance, smaller size and smooth control. Compute Chopping frequency, If the pulse width is halved for constant frequency of operation, find the new output voltage. When the chopper is ON, the inductor L is connected across the supply.

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A variable dc voltage is obtained from a constant dc voltage source. To obtain full output voltage range, frequency has to be varied over a wide range. Feedback Privacy Policy Feedback.


EE6503 PE Notes, Power Electronics Lecture Handwritten Notes – EEE 5th SEM Anna University

In step up chopper output voltage is more than input voltage. The output required is V.

Diode D prevents any current flow ppwer capacitor to the source. When chopper is ON, its voltage drop is 1. Also used in regenerative braking. Malvino chapter 3, 4. Pulse width modulation control or constant frequency operation. To use this website, you must agree to our Privacy Policyincluding cookie policy.

To reduce the load ripple current, frequency should be as high as possible. Malvino chapter 3, Next:.


We think you have liked this presentation. To make this website work, we log user data and share it with processors. Duty cycle d can be varied only between a min. Registration Notez your password?