What is a two-speed motor
The two-speed motor belongs to the variable-pole speed regulation of the asynchronous motor, which is to change the number of pole pairs of the rotating magnetic field of the stator by changing the connection method of the stator winding, thereby changing the speed of the motor.
Variable speed principle of two-speed motor
The speed of the motor is changed by changing the connection of the winding, that is, by changing the number of pole pairs of the rotating magnetic field of the motor to change its speed.
Two-speed motor (fan), the speed is usually low, and sometimes the fan rotates at high speed, mainly through the following external control circuit switching to change the winding connection of the motor coil.
1. Two common windings with different pole pairs are embedded in the stator slot, and the connection of the stator winding of the motor is changed by switching the external control circuit to change the number of magnetic pole pairs;
2. Two independent windings with different pole pairs are embedded in the stator slot;
3. Two independent windings with different pole pairs are embedded in the stator slot, and each winding can have different connection.
Two-speed motor control circuit diagram
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