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介绍一种用晶闸管作为斩波器控制绕线式电动机转子外接电阻的调速方法。这种调速方法使转子电阻连续的无触点变化，改变常规转子电阻分级控制的不理想特性。
A thyristor as a chopper control winding motor rotor external resistance speed control method. This speed regulation method makes the rotor resistance continuous non-contact change, changing the undesirable characteristics of the conventional rotor resistance grading control.