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Thyristor motor controller

阅读:602发布:2021-12-23

专利汇可以提供Thyristor motor controller专利检索,专利查询,专利分析的服务。并且PURPOSE: To prevent the torque of a thyristor motor from varying by varying the current limiting value of a current limiting circuit when a control lead angle is altered.
CONSTITUTION: A synchronous motor 4 is operated via an AC power supply AC, a forward converter 1 and a reverse converter 2. When motor rotating speed is less than predetermined level, a speed judging circuit 15 produces a low level signal, and a phase shifter 13 produces an arc signal that the control lead angle is zero. In this case, the limiting value of the current limiting circuit 8 is set at low value. When the motor rotating speed is raised higher than predetermined value, the circuit 15 produces a high level signal. Thus, the control lead angle is so altered that the reverse converter 3 can naturally commutate, and the limiting value of the circuit 8 is altered to large value. Thus, the limiting value of the circuit 8 is altered to vary the current simultaneously upon variation of the control lead angle to thereby prevent the torque of the motor from varying.
COPYRIGHT: (C)1980,JPO&Japio,下面是Thyristor motor controller专利的具体信息内容。

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