交流接触器电寿命试验装置研究

Research on Electrical Life Test Device of AC Contactor

根据不同使用类别下验证接触器电寿命的接通与分断条件,将试验分为接通、分断、恒载和变载4种试验模式。针对传统电寿命试验方案中用接触器做陪试品时操作频率相对较低、大电流时灭弧困难等问题,提出了采用晶闸管作为试验电源切换陪试品的试验方法,设计了试验装置;分析并设计了晶闸管触发电路,实现了试验电源的可靠切换。最后,设计了晶闸管控制下的各试验模式控制时序。

According to different test conditions for the verification of electrical life of contactor making and breaking under different categories, the test can be classified into four types, making test, breaking test, constant-load test and different-load test. Aiming at the problems of the traditional electrical life test with a contactor, such as the low operating frequency, the difficulty of extinguishing arc at high current, this paper, proposed a test method of using thyristor for switching power supply and designed the test device. It designed the thyristor trigger circuit,and achieved the switching of test power reliably. Finally,the action sequence diagram of each test type was designed.