It also includes, Hall element inputs, a sequencer for commutation control, fixed off time pulse width modulation (PWM) current control and locked rotor protection.

它还包括霍尔元件输入、整流控制定序器、固定停机时间脉冲宽度调制(PWM)电流控制以及锁定转子保护。

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This has the advantages of simplicity, reliability, high frequency accuracy, strong commutation ability and less strict demand for SCR off-time the paper concludes with a list of the test results.

该变频调速系统具有简单、可靠、频率精度高、换流能力强和对可控硅关断时间要求不高等优点。最后给出了试验结果。

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