| 摘要 |
The invention discloses a speed variator for an AC motor included preferably in a food processing apparatus. The variator comprises a controllable switching member, such as a triac, and an RC circuit for regulating the motor speed to a predetermined speed. A current compensating circuit is provided, connected across the terminals of capacitors in the regulating circuit and to a terminal of the variator for compensating a current increase to maintain the predetermined motor speed regardless of the fluctuations of the load torque on the motor during motor operation.
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