Abstract: Not only uncontrolled rectifier but also phase controlled rectifier have the same weakness of low power factor.PWM rectifier is made of full-controlled device,working as PWM mode.Based on teaching material of Power Electric Technology,this paper analyses fundamental and four work modes of single phase voltage type PWM rectifier.If appropriate work modes and right interval between various modes are adopted,the current of AC side will vary according to scheduled aim,the energy can be bidirectional flow between AC side and DC side.The current of AC side is close to sine wave very much,and gets the same phase with voltage of AC side,then the convert will get high power factor.
Publication Year: 2007
Publication Date: 2007-01-01
Language: en
Type: article
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