Random pulse width modulation technique can be used to distribute voltage harmonics over a wide frequency range and to realize the reduction of acoustic noise and vibration.
The resonant soft switching inverter arc welding power source uses LCL type structure in the main circuit, and selects phase shifting pulsewidemodulation technique in the control system.
研制的谐振式软开关弧焊逆变电源，主电路采用新型LCL结构，控制系统选用恒频移相调脉宽控制方案。
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This paper introduces the pulsewidemodulation (PWM) based on minimum root-mean-square value of harmonic current of inverter.