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Advantages and disadvantages of Brushless DC motor

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Advantages and disadvantages of Brushless DC motor

  • Categories:Industry News
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  • Time of issue:2021-06-23
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(Summary description)The brushless motor includes the motor body and the drive, and is a typical mechatronic product. Let’s take a look at the advantages and disadvantages of Brushless DC motor.

Advantages and disadvantages of Brushless DC motor

(Summary description)The brushless motor includes the motor body and the drive, and is a typical mechatronic product. Let’s take a look at the advantages and disadvantages of Brushless DC motor.

  • Categories:Industry News
  • Author:
  • Origin:
  • Time of issue:2021-06-23
  • Views:0
Information

The brushless motor includes the motor body and the drive, and is a typical mechatronic product. Let’s take a look at the advantages and disadvantages of Brushless DC motor.

customized Brushless DC motor from China manufacturer
Advantages of Brushless DC motor:
1. With excellent linear mechanical characteristics of Brushless DC motor, wide speed range, stepless speed control can be realized, and the speed range is wide;
2. Excellent torque characteristics, good mid- and low-speed torque performance, large starting torque, small starting current; strong overload capacity;
3. The soft start and stop, with good braking characteristics, can save the original mechanical braking or electromagnetic braking device;
4. High efficiency. Compared with AC motors, Brushless DC motor has no excitation loss, and has no brush friction loss and sparkle compared with brushless DC motor;
5. Brushless DC motor has high reliability, good stability, strong adaptability and simple maintenance;
6. Brushless DC motor is small in size, light in weight and large in output;
7. Resistance to turbulence and vibration, low noise, low vibration, smooth operation and long life.
Disadvantages of Brushless DC motor:
1. Cost: Rare earth permanent magnets are much more expensive than other permanent magnets, which leads to an increase in the cost of Brushless DC motor.
2. Limited constant power range: A large constant power range is essential to obtain high vehicle efficiency. The permanent magnet Brushless DC motor cannot achieve a maximum speed greater than twice the base speed.
3. Safety: In the manufacturing process of the motor, since the large rare earth permanent magnet can attract scattered metal objects, it may be dangerous. In the event of a vehicle crash, if the wheels spin freely while the motor is still excited by permanent magnets, a high voltage will appear at the terminals of the motor, which may endanger passengers or rescuers.
4. Magnet demagnetization: permanent magnets can be demagnetized by large reverse magnetomotive force and high temperature. For each permanent magnet material, its critical demagnetization force is different. When cooling the motor, especially if the motor is compactly constructed, great care must be taken.
5. High-speed performance: It is impossible for motors with surface-mounted permanent magnets to achieve high speeds, because they are limited by the mechanical strength of the assembly between the rotor yoke and the permanent magnets.
The above is the introduction of the advantages and disadvantages of Brushless DC motor. I hope it will be helpful for you to buy Brushless DC motor wholesale.

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