A current type PWM rectifier with active damping function

Conference · Sun Dec 31 04:00:00 EST 1995

OSTI ID:427929

Sato, Yukihiko; Kataoka, Teruo ^[1]

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1. Tokyo Inst. of Tech. (Japan). Dept. of Electrical and Electronic Engineering

A new control method for current type PWM rectifiers which can provide active damping function is presented. This damping function is effective only on the harmonic components of ac input current selectively. Thus steady state waveform distortion and transient oscillation of the input current are reduced by the active damping effects. The active damping function can be realized by feed-back control of an LC filter connected to the ac side of the rectifier, and it does not require any additional components in the main circuits, permitting a simple circuit configuration. The control system of the proposed PWM rectifier is analyzed by using a simple block diagram developed in the present paper. From the analytical results, the influence of the circuit parameters and control delay on the active damping effects and the stability of the operation is clarified to establish the design method. To confirm the effectiveness of the active damping function, some results of basic experiments are included. As an example of application of the active damping function, the proposed rectifier is applied to reduce the harmonic currents generated by conventional rectifiers operating in parallel with the proposed rectifier. Some experimental results in this application are also included.

• OSTI ID: 427929
• Report Number(s): CONF-9510203--
• Country of Publication: United States
• Language: English

Related Subjects

24 POWER TRANSMISSION AND DISTRIBUTION
CONTROL
DAMPING
DIAGRAMS
ELECTRIC FILTERS
OSCILLATIONS
POWER CONDITIONING CIRCUITS
RECTIFIERS