Abstract:An ideal inverter should have sinusoidal voltage and current outputs. Generally, output voltages of a voltage‐source PWM inverter contain high‐level switching frequency harmonies due to the PWM operation, while output currents are kept nearly sinusoidal. High‐level harmonics contained in output voltages of a voltage‐source inverter cause acoustic noises, iron losses and electromagnetic interferences. An LC filter was used to suppress the switching frequency harmonics; however, there is a danger of resonance in… Show more
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