What is a brush motor?
Answer: When the motor is working, the coil and the commutator rotate, the magnetic steel and the carbon brush do not rotate, and the alternating current direction of the coil is completed by the commutator and the brush that rotate with the motor. Brush motors in the electric vehicle industry are divided into high speed brush motors and low speed brush motors. There are many differences between brush motor and brushless motor. It can be seen from the word that the brush motor has a carbon brush, and the brushless motor has no carbon brush.
★ What is a low-speed brush motor? What are the characteristics?
Answer: In the electric vehicle industry, the low-speed brush motor refers to the hub-type low-speed high-torque gearless transmission brushed DC motor. The relative speed of the motor stator and rotor is the wheel speed. The number of magnetic steels on the stator is 5 to 7 pairs, and the number of slots of the rotor armature is 39 to 57. Since the armature winding is fixed in the wheel housing, heat is easily dissipated by means of the rotating housing. The rotating outer casing is woven with 36 spokes, which is more favorable for heat conduction.
★The characteristics of brushed toothed motor?
Answer: Because there is a brush in the brush motor, the main hidden danger is “brush wear”. Users should notice that the brush motor is divided into two types: toothed and toothless. At present, many manufacturers choose brushed and toothed motors, which are high-speed motors. The so-called "toothed" is to reduce the motor speed through the gear reduction mechanism (the speed of the electric vehicle must not exceed 20 kilometers due to the national standard, so the motor speed should be 170 rpm / minute or so). Since the high-speed motor is decelerated by the gear, it is characterized by the rider feeling strong power at the start, and the climbing ability is strong. However, the electric hub is closed, but the lubricant is added before leaving the factory. It is difficult for the user to carry out daily maintenance, and the gear itself also has mechanical wear. The gear wear is increased due to insufficient lubrication for a year or so, the noise is increased, and the current is also used. Increase, affecting motor and battery life.
