Pulse-width modulation Fig. 42 / PCS series

Building a sine from a DC bus

Four IGBTs chop an 800 V battery bus thousands of times a second; an LC filter recovers the 60 Hz sine the grid wants. Move the sliders to trade harmonic distortion against switching heat.

Switching freq—

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Modulation m—

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Filter size L·C—

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Try

Power stage — full-bridge PCS

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THD, filtered voltage

clean output

Losses, 4 IGBTs η —

0700 W scale

conduction — switching —

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sine reference raw PWM filtered output carrier

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Interactive simulation of a PWM inverter: an IGBT full bridge chops an 800 volt DC bus, an LC filter recovers a 60 hertz sine, with live THD and loss meters and controls for switching frequency, modulation index, and filter size.