First, the characteristics of brushless motor:
1. It can replace DC motor speed regulation, frequency converter + frequency converter motor speed regulation, asynchronous motor + reducer speed regulation.
2. The brushless DC motor has the advantages of traditional DC motor, and at the same time, the structure of carbon brush and sliding ring is cancelled.
3. It has braking and double steering functions.
4. Small size, light weight and large output;
5. Excellent torque characteristics, good middle and low speed torque performance, large start-up torque and small start-up current;
6. Stepless speed regulation, wide range of speed regulation, strong overload capacity;
7. Soft start, soft stop and good braking characteristics can save the original mechanical brake or electromagnetic brake device.
8. High efficiency, no excitation loss and carbon brush loss of the motor itself, eliminating multi-stage deceleration loss, the comprehensive power saving rate can reach 20%~60%.
9. High reliability, good stability, strong adaptability and simple maintenance.
10. Anti-turbulence and vibration, low noise, small vibration, smooth operation and long service life;
11. No sparks, especially suitable for explosive sites, with explosion-proof type;
12. Trapezoidal wave magnetic field motor and sinusoidal wave magnetic field motor can be selected as required.
Second，dvantages of Brushless Motor
Unlike brushless DC motors, brushless DC motors do not use mechanical brush devices. Square-wave self-controlled permanent magnet synchronous motors, Hall sensors instead of carbon brush commutators, and Nd-Fe-B as permanent magnet materials for rotors have great advantages over conventional DC motors in performance. They are the most ideal speed-regulating motors nowadays.
Advantages of DC brushless motor: high efficiency, low energy consumption, low noise, long life, high reliability, servo control, stepless frequency conversion speed regulation, relatively low cost and easy to use.
The stator windings of brushless DC motor are mostly made into three-phase symmetrical star connection, which is very similar to three-phase asynchronous motor. In order to detect the polarity of the motor rotor, a position sensor is installed in the motor. The driver is composed of power electronic devices and integrated circuits. Its functions are: to receive the starting, stopping and braking signals of the motor to control the starting, stopping and braking of the motor; to receive the position sensor signals and the positive and negative rotation signals to control the switching on and off of the power transistors of the inverting bridge and to generate continuous torque; to receive speed instructions and speed feedback signals to control and adjust the rotation. Speed; Provide protection and display, etc.