The advantages of our company’s permanent magnet brushless DC motor are:
1. High efficiency
The permanent magnet brushless DC motor is a synchronous motor. The permanent magnet characteristics of its rotor determine that the motor does not need to perform rotor excitation like an asynchronous motor, so there is no copper loss and iron loss on the rotor. Under rated load, its efficiency is higher than that of asynchronous motors with the same capacity. The motor is increased by 5%-12%.
At the same time, the low magnetic permeability and high internal resistance of the NdFeB material itself, and the rotor iron core adopts the silicon steel lamination structure, which reduces the eddy current loss and avoids the thermal demagnetization of the NdFeB material.
2. Wide range of high efficiency area
Under the rated load, the interval where the efficiency of the permanent magnet brushless DC motor system is greater than 80% accounts for more than 70% of the speed range of the entire motor.
3. High power factor
The permanent magnet brushless DC motor rotor does not need excitation, and the power factor is close to 1.
4. Large starting torque, small starting current and large overload torque
The mechanical characteristics and adjustment characteristics of the permanent magnet brushless DC motor are similar to those of the other-excited DC motor, so its starting torque is large, the starting current is small, and the adjustment range is wide, and it does not need a starting winding like a synchronous motor. In addition, the maximum overload torque of the permanent magnet brushless DC motor can reach 4 times its rated torque.
Permanent magnet brushless DC motor is suitable for occasions of long-term low-speed operation and frequent start and stop, which is impossible for the Y-series motor driven by the variable frequency governor.
5. High motor power density
Compared with the asynchronous motor, the permanent magnet brushless DC motor has 30% higher output power than the asynchronous motor when the volume and maximum working speed are the same.
6. Strong adaptability
Under the premise of speed closed-loop control, when the power supply voltage deviates from the rated value by +10% or -15%, the ambient temperature differs by 40K, and the load torque fluctuates from 0-100% of the rated torque, the actual speed of the permanent magnet brushless DC motor is the same as The steady-state deviation of the set speed is not greater than ±1% of the set speed.
7. Stable control performance
Permanent magnet brushless DC motor is a self-controlled speed regulation system, which will not produce oscillation and loss of step when the load changes suddenly.
8. Simple structure, easy to maintain
Permanent magnet brushless DC motor has the advantages of DC motor, the structure of AC asynchronous motor, and the structure is simple and easy to maintain.