来源：http://www.jnmcd.com 发布时间：2019-01-21 浏览：次
Electric motor is one of the four components of electric vehicle. Its function is to convert the electric energy of battery into mechanical energy and drive the wheels of electric vehicle to rotate, so as to reach the intent of electric vehicle to ride in succession.
Common motor varieties are: brush toothed high-speed hub motor, brush toothed low-speed hub motor, brushless toothed low-speed hub motor, brushless toothed high-speed hub motor, side-hanging motor, etc.
What is a brush motor?
When the motor works, the coil and commutator rotate, the magnetic steel and carbon brush do not rotate, and the change of coil current direction is accomplished by the commutator and carbon brush rotated with the motor.
The brushless motor has larger force and fewer wires than the brushless motor, so it has a positive and negative pole line. If the motor rotates, it can be accomplished by adjusting the orientation of the two lines. Brush motors in electric vehicles can be divided into high speed brush motors and low speed brush motors.
There are many differences between brushless motor and brushless motor. The simplest way to distinguish brushless motor from brushless motor is that brushless motor has carbon brush and brushless motor has no carbon brush. But brush motors are noisy, and now brush motors have been basically eliminated.
What is a brushless motor?
The brushless motor is supplied by the controller with DC current in different current directions, which is replaced by the coil current direction in the motor. There is no carbon brush and commutator between the rotor and stator of brushless motor.
Brushless motor operation principle:
Internal structure of brushless motor
DC power supply supplies power to motor stator winding through switching circuit. Three azimuth sensors (commonly known as Hall) can detect the orientation of the rotor at any time. According to the orientation signal of the rotor, they can control the turn-on and cut-off of six switches. Then they can automatically control which winding is electrified and the direction of electrification, and then complete the electronic commutation.
Brushless toothless motor is one of the most widely used motors in electric vehicles nowadays. It is widely used by electric vehicle manufacturers because of its long life, relatively simple structure, no noise and many other advantages. Brushless motor has 60 degree angle, 120 degree angle and 180 degree angle, and the angle of the controller should be matched. Otherwise, the new controllers and motors will not work properly. Special attention should be paid to angle when repairing and replacing.
Motor main phase line
Brushless toothless motor has eight wires, three main phase lines are thick yellow, thick green, thick blue and five thin wires. They are fine red line, fine black line, fine green line, fine yellow line, fine blue line and so on. It can be tested by digital multimeter (power-on condition test) or car repair treasure (power-off condition) whether there is any motor fault.
The above information is our Shandong brushless motor finishing and publishing hope to help you all on our website is: http://www.jnmcd.com!