The net side current of three_phases bridge phase_control rectifier circuits with load of big coil is expanded to harmonic expansion,from this we reach the conclusion that three_phases bridge phase_control rectifier circuit is equal to a current harmonic resource with high frequency harmonics.

The novel power filter consists of the well tuned LC passive filter, the additional inductor and the active power filter (APF) which is controlled as a harmonic current source.

For the harmonic source loads of rectifier bridges,DC side shunt active power filter(APF) is found inadequate for voltage type harmonic sources,therefore its dual topology-DC side series APF is studied by analyzing harmonic characteristics of the voltage type and current type harmonic sources.

Research on supply harmonic of high power density induction motor equipped with VVVF converter;

Design of harmonious wave power supply based on TMS320VC5402;

Suppression technology of input current harmonic and conducted electro-magnetic emission for arc welding equipment

These current harmonics exists in any nonzero speed and are independent of time-varying parameters,such as stator winding resistance.

This paper presents the current harmonic analysis of a high frequency model of AC/DC voltage source converter using PWM with phase and amplitude control.