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Single-phase shading coil type motor reactive resistance spe

2016-09-01 08:11  
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Single-phase shading coil type motor reactive resistance speed regulating circuit
As the picture shown, the reactive resistance is in series of motor, adjusting the regulating switch SA. When the key of “fast” is touched, the reactive resistance is not connected, and then the motor operates at full voltage, so the speed is the fastest; When the key “middle” is touched, some inductance coil will be serial, so the speed is intermediate; when the key of “slow” is touched, all the L coils are connected to the stator winding, so the speed of the motor is slowest.