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1. 发明授权

US06351397B1 Protection apparatus and protection method of PWM cycloconverter 失效
标题翻译： PWM循环变频器的保护装置和保护方法
公开(公告)号：US06351397B1
公开(公告)日：2002-02-26
申请号：US09830700
申请日：2001-04-30
申请人： Toshihiro Sawa , Xiaorong Xia , Sadao Ishii , Eiji Yamamoto , Hidenori Hara
发明人： Toshihiro Sawa , Xiaorong Xia , Sadao Ishii , Eiji Yamamoto , Hidenori Hara
IPC分类号： H02H710
CPC分类号： H02M5/271 , H02M1/32 , H02P27/16 , H02P29/02
摘要： A protection apparatus and a protection method of a PWM cycloconverter wherein when the PWM cycloconverter is shut off, a surge voltage or an overcurrent is not produced on the output side are provided. A protection apparatus of a PWM cycloconverter is made up of fault detection means 30 for detecting a fault of the PWM cycloconverter, operation stop means 25 for turning off at least some of the uni-directional semiconductor switches 3 to 20 of the PWM cycloconverter if a fault signal occurs, continuous flow means for allowing a load current of the PWM cycloconverter to continuously flow if at least some output phases of the PWM cycloconverter become open, and protection switching means 50 for turning on and off the unidirectional semiconductor switches of the PWM cycloconverter based on the fault signal output from the fault detection means.
摘要翻译：一种PWM循环变换器的保护装置和保护方法，其中当PWM循环换流器被切断时，在输出侧不产生浪涌电压或过电流。 PWM循环变频器的保护装置由用于检测PWM周波变换器的故障的故障检测装置30，用于关断PWM周波变换器的至少一些单向半导体开关3至20的操作停止装置25，如果发生故障信号，如果PWM循环变换器的至少一些输出相位变为断开，则允许PWM周波变换器的负载电流连续流动的连续流动装置;以及用于接通和关断PWM周波变换器的单向半导体开关的保护开关装置50 基于从故障检测装置输出的故障信号。

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