低能耗电机保护电路设计  

Design of Low Consumption Electric Motor Protection Circuit

作　　者：蔡可健[1] 

机构地区：[1]江苏食品职业技术学院机电系,淮安223001

出　　处：《电机与控制应用》2006年第8期53-54,58,共3页Electric machines & control application

摘　　要：提出一种安装在电机内部的多功能保护电路。它直接运用电机自身的温度参量去控制电源通断,其热感应速度快,热时间常数小于5s;控制准确,精度小于±1.5℃;可降低保护装置的生产成本。该保护电路与传统的保护电路相比,不仅无需考虑交流接触器的热稳定性,还省去了热继电器、交流接触器等保护装置的耗能。A multi-functional protective circuit built in electric motor is given. Using electric motor＇s temperature parameter controls switching of power supply. With advantages of quick thermal sensitive speed, thermal time constant less than 5 s, precise control, accuracy less than ± 1.5 ℃ , the productive cost of protective device is reduced, Comparing this protective circuit with conventional protective circuit, it has advantages of independent from thermal stability of AC contactor, save energy consumption of thermal relay and AC contactor etc.

关 键 词：异步电机 保护电路 热敏电阻 

分 类 号：TM307.3[电气工程—电机]