Description:

In the rectifier circuit, the waveform of the input current is an irregular square wave, which can be decomposed into fundamental and various harmonics through Fourier series. The higher-order harmonics can interfere with the input power supply system. In the inverter output circuit, the output current signal is a pulse waveform modulated by PWM carrier signals. For high-power GTR inverter components, the PWM carrier frequency is 2-3kHz, while for high-power IGBT inverter components, the highest PWM carrier frequency can reach 15kHz. Similarly, the output circuit current signal can be decomposed into a fundamental sine wave and other harmonics, with higher-order harmonic currents directly interfering with the load. Additionally, higher-order harmonic currents can also radiate through cables and interfere with neighboring electrical devices.

Scope of Application:

Electronics and electrical products.

Applicable Countries and Standards:

Image of Testing Equipment: