绕线式电机恒转矩起动的研究与实践

从分析绕线式交流异步电动机的机械特性着手，讨论了恒转矩负载下的转子串电阻调速特性，进而推导出转子串电阻实现电机恒转矩起动的电阻数学模型。最后介绍实现绕线式异步电动机恒转矩起动的液体电阻起动器。

Study and Practice of Start-up of Constant Torque of Winding Motor

Based on analysis of mechanical characteristics of AC winding asyn-chronous motor during load of constant torque speed governing characteristics of series con-nection of rotor with resistance are discussed. A mathematic model of calculating the resistance has been derived. The resistance is series connection with the rotor to realize start-up of constant torque of the motor. Liquid resistance starter used to realize start-up of constant torque of the winding asynchronous motor are presented in this paper.