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1. 发明申请

US20090072839A1 Apparatus and method to detect failure of smoothing electrolytic capacitor 审中-公开
标题翻译：检测平滑电解电容器故障的装置和方法
公开(公告)号：US20090072839A1
公开(公告)日：2009-03-19
申请号：US12078950
申请日：2008-04-08
申请人： Myung Chul Kim , Jae Young Choi , Jang Ho Yoon , Song Bin Lee , Kwong Woon Lee
发明人： Myung Chul Kim , Jae Young Choi , Jang Ho Yoon , Song Bin Lee , Kwong Woon Lee
IPC分类号： G01R31/12
CPC分类号： G01R31/42 , G01R31/028
摘要： An apparatus and method to detect failure of an electrolytic capacitor that smoothes a DC voltage in an inverter circuit. The apparatus detects failure of a smoothing electrolytic capacitor in a motor drive inverter circuit that rectifies and smoothes an AC voltage through a rectifier and the smoothing electrolytic capacitor and converts a rectified and smoothed DC voltage into a 3-phase voltage to drive a motor. The apparatus includes a voltage meter, a current sensing unit, and a controller. The voltage meter measures a DC voltage of an inverter when the motor is not in operation. The current sensing unit measures a phase current of the motor when the motor is not in operation. The controller estimates an ESR value of the smoothing electrolytic capacitor from the DC voltage of the inverter and the motor phase current to detect failure of the smoothing electrolytic capacitor.
摘要翻译：一种检测在逆变器电路中平滑直流电压的电解电容器的故障的装置和方法。该装置检测电动机驱动逆变器电路中的平滑电解电容器的故障，该电动机驱动逆变器电路通过整流器和平滑电解电容器对AC电压进行整流和平滑，并将整流和平滑的DC电压转换成三相电压以驱动电动机。该装置包括电压计，电流检测单元和控制器。当电机不工作时，电压表测量变频器的直流电压。当电机不工作时，电流检测单元测量电机的相电流。控制器根据逆变器的直流电压和电动机相电流来估计平滑电解电容器的ESR值，以检测平滑电解电容器的故障。

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