What are the motor speed adjustment methods
2024-03-28
What are the methods of motor speed regulation? There are two ways of DC motor speed regulation: voltage regulation and frequency regulation.
Three-phase asynchronous motor for you to share: the use of brush motor ordinary fan can change the speed by regulating the way, and the use of variable frequency motor fan, can only be adjusted by frequency modulation.
For a brushed motor, changing the power supply voltage is to change the current in the rotor winding to change the magnetic field strength and torque. The speed of the motor increases with the increase of torque, and decreases with the decrease of torque. When the load resistance of this kind of motor increases, the speed of the motor will decrease accordingly. In order to maintain the same speed when the load changes, the closed-loop control is used to achieve the speed negative feedback, so the control circuit is more complex.
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