Speed regulating switch is an electronic switch that uses electronic circuit or microprocessor chip to change the motor's stage, voltage, current, frequency and other methods to control the motor's speed, so as to make the motor reach a higher performance.For AC motors, speed regulation methods include: 1) inductive speed regulation, 2) tap speed regulation, 3) capacitive speed regulation, 3) thyristor speed regulation, and 4) variable frequency speed regulation.For DC motor, speed regulation methods include: 1) speed regulation by armature circuit resistance, 2) speed regulation by armature voltage, 3) speed regulation by thyristor converter, 4) speed regulation by pulse width of DC motor for high-power semiconductor devices, and 5) speed regulation by excitation current.
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