Brushless DC motors have been widely used in recent years. The reason is that its low noise, low vibration and other advantages provide convenience for our work and life, reduce work time, and improve work efficiency. For convenience Everyone’s choice, what I want to share with you is what are its sudden advantages compared with AC induction motors. Come and take a look with me.
1. The rotor adopts magnets and no excitation current is needed. With the same electrical power, greater mechanical power can be obtained.
2. The rotor has no copper loss and iron loss, and the temperature rise is smaller.
3. Large starting and locked-rotor torque is beneficial to the characteristics of large torque required for valve opening and closing.
4. The output torque of the motor is proportional to the working voltage and current. The torque detection circuit is simple and reliable.
5. Adjust the average value of the power supply voltage through the PWM method to realize the stable speed regulation of the motor. The speed regulating and driving power circuit is simple and reliable, and the cost is low.
6. Lower the power supply voltage to start the motor through PWM, which can effectively reduce the start current.
7. The power supply of the motor is a DC voltage modulated by PWM. Compared with the sine wave AC power supply of an AC variable frequency motor, the electromagnetic radiation generated by its speed regulation and drive circuit is smaller, and the harmonic pollution to the power grid is smaller.
8. Using a closed-loop speed control circuit, the motor speed can remain unchanged when the load torque changes.
www.dw-motor.com