Jyotiprakash Lenka

Dept. of Electrical &Electronics

Engineering

Regd No-1021288015

4/13/20131

Introduction

Classification

Conclusion

Reference

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Resonant inverters are electrical inverter based

on resonant current oscillation. It is known as DC to

DC Converter or Dc to Ac PWM inverter.

Main function is to reduce switching losses of the

devices(MOSFET&IGBT).

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The Resonant Converter broadly Classified into Eight types. Those are:-

1. Series Resonant inverter

2. Parallel Resonant inverter

3. Class E Resonant Converter

4. Class E Resonant Rectifier

5. Zero Voltage Switching(ZVS) Resonant Converter

6. Zero Current Switching(ZCS) Resonant Converter

7. Two Quadrant ZVS Resonant Converter

8. Resonant dc-link inverter

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It is Based on resonant current oscillation.

Switching device are placed in series with Load.

Thyristor are work in switching device.

This type of inverter produces an approximately

sinusoidal wave form at a high Frequency ,ranging

from 200Hz to 100KHz.

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Circuit dig. of series Resonant Converter

Equivalent circuit dig. Waveform 4/13/2013 6

Parallel Resonant inverter is dual of series resonant

inverter

Current is continuously controlled , that gives better

short circuit protection under fault condition

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It has low switching losses , yielding a high efficiency

of more than 95%.

Used in low power application & high frequency

electric lamp.

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Circuit Dig. of class E Resonant inverter & Wave Form

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Class E Resonant Rectifier is based on the principle of

Zero Voltage Switching(ZVS) .

The diode turn off at zero voltage.

A high frequency diode rectifier suffers from

disadvantage that is switching losses , harmonic

content.

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The ZVS Resonant Converter turn on & turn off at zero

voltage.

Output voltage control can be achieved by varying the frequency & operates with constant off time control .

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Zero Current Switching(ZCS) Resonant Converter turn

On & turn off at zero current.

This converter can operate at higher range frequency

that is 1MHz to 2Mhz.

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The DC link inverter is similar to the PWM inverter .

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It is used for high frequency application.

ZCS&ZVS becomes popular and they can turn ON

&turn OFF at zero voltage&current and also eliminate

switching losses.

In dc-link inverters , a resonant circuit is connected

between the inverter & DC supply.

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1. Muhammad H. Rashid ,”Power Electronics”

,Pearson publication,5th Edition, Ch-8, pg-352 to 404

2. P.S. Bimbhra,”Power Electronics”, Khanna

Publication,3rd Edition, Ch -11, pg-572 to 581

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