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DC TO AC CONVERTER Mohd Shawal Bin Jadin Faculty of Electrical & Electronic Engineering [email_address] BEE4223  Power Electronics & Drives Systems
OVERVIEW ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
LEARNING OUTCOMES ,[object Object],[object Object],[object Object]
INTRODUCTION ,[object Object],[object Object],[object Object]
TYPES OF INVERTER ,[object Object],[object Object]
VOLTAGE SOURCE INVERTER (VSI) WITH VARIABLE DC LINK ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
VOLTAGE SOURCE INVERTER (VSI) WITH VARIABLE DC LINK ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
VSI WITH FIXED DC LINK ,[object Object],[object Object],[object Object]
SQUARE WAVE INVERTER ,[object Object],[object Object],[object Object]
OPERATION OF SIMPLE SQUARE-WAVE INVERTER  ,[object Object],[object Object],SQUARE-WAVE INVERTERS EQUIVALENT CIRCUIT
WHEN S1-S2 TURN ON & S3-S4 OFF FOR T 1  < T < T 2
WHEN S1-S2 TURN OFF& S3-S4 ON FOR T 2  < T < T 3
PERFORMANCE  PARAMETERS
EXAMPLE ,[object Object],[object Object],[object Object],[object Object]
FOURIER SERIES ANALYSIS FOR SQUARE WAVE INVERTER ,[object Object]
FOURIER SERIES ANALYSIS FOR SQUARE WAVE INVERTER ,[object Object]
EXAMPLE 1 ,[object Object],[object Object],[object Object]
EXAMPLE 2 ,[object Object],[object Object]
EXAMPLE 2 n f n  (Hz) V n  (V) Z n  (  ) I n  (A) P n  (W) 1 60 127.3 13.7 9.27 429.3 3 180 42.3 30 1.42 10 5 300 25.5 48.2 0.53 1.4 7 420 18.2 66.7 0.27 0.37 9 540 14.1 85.4 0.17 0.14
EXAMPLE 1 (CONT)
AMPLITUDE & HARMONIC CONTROL ,[object Object],[object Object],[object Object],[object Object]
EXAMPLE 2 ,[object Object]
EXAMPLE 2 (CONT) ,[object Object]
EXAMPLE 1 (CONT)
EXAMPLE 1 (CONT) n f n  (Hz) V n  (V) Z n  (  ) I n  (A) 1 60 127.3 13.7 9.27 3 180 0 30 0 5 300 25.5 48.2 0.53 7 420 18.2 66.7 0.27 9 540 0 85.4 0
TRY THIS……… ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
PULSE-WIDTH MODULATED OUTPUT  ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
PULSE WIDTH MODULATION (PWM)
PULSE WIDTH MODULATION (PWM) ,[object Object],[object Object],[object Object]
PULSE WIDTH MODULATION (PWM) ,[object Object],[object Object],[object Object]
PULSE WIDTH MODULATION (PWM) ,[object Object],[object Object],[object Object]
PULSE WIDTH MODULATION (PWM) TYPES ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
BIPOLAR SWITCHING
UNIPOLAR SWITCHING
PULSE WIDTH MODULATION IN UNIPOLAR INVERTERS The square wave output can be produced using a comparator to compare the triangle wave with the sine wave.
HALF-BRIDGE INVERTER ,[object Object],[object Object],[object Object],[object Object],[object Object]
SHOOT THROUGH FAULT AND“DEAD-TIME” ,[object Object],[object Object],[object Object]
INTRODUCTION TO THREE-PHASE INVERTER ,[object Object],[object Object]
THREE PHASE INVERTER WAVEFORMS
SUMMARY ,[object Object],[object Object],[object Object],[object Object]

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Powerelectronics Chapter7 090331060223 Phpapp02