What is a brushless motor?
Since the controller provides direct current in different current directions, the alternating current direction of the coil inside the motor is reached. There are no brushes and commutators between the rotor and the stator of the brushless motor.
★How does the motor achieve commutation?
Answer: When the brushless or brushed motor is rotating, the energizing direction of the coil inside the motor needs to be alternately changed, so that the motor can continuously rotate. The commutation of the brushed motor is done by the commutator and the brush, and the brushless motor is completed by the controller.
★ What is the lack of phase?
A: One phase of the three-phase circuit of the brushless motor or the brushless controller cannot work. The lack of phase division main phase phase loss and Hall phase loss. It is manifested that the motor shake can not work, or the rotation is weak and the noise is loud. The controller works easily in the phase loss state and is easily burned.
★What are the common types of motors?
Answer: Common motors include: brushed hub motor, brushless gear hub motor, brushless gear hub motor, brushless gearless hub motor, side-mounted motor, etc.
★How do you distinguish between high and low speed motors from the type of motor?
Answer: A brushed gear hub motor, brushless gear hub motor belong to high speed motor; B brushless gearless hub motor, brushless gearless hub motor belong to low speed motor.
★How is the power of the motor defined?
Answer: The power of the motor refers to the ratio of the mechanical energy output by the motor to the power supplied by the power supply.
★ Why choose the power of the motor? What is the significance of choosing the motor power?
A: The choice of rated power of the motor is a very important and complicated problem. When the load is too high, if the rated power of the motor is too large, the motor will often be in light load operation, and the capacity of the motor itself will not be fully exerted, and it will become a “large horse-drawn car”. At the same time, the motor has low operating efficiency and poor performance, which will increase. Operating expenses. Conversely, the rated power of the motor is small, that is, the "small horse-drawn cart", the motor current exceeds the rated current, the loss in the motor is increased, and the efficiency is low, the important thing is to affect the life of the motor, even if the overload is not much The life of the motor will also be reduced more; the overload will destroy the insulation performance of the motor insulation material or even burn it. Of course, the rated power of the motor is small, and the load may not be dragged at all, which may cause the motor to be in a startup state for a long time and be damaged by overheating. Therefore, the rated power of the motor should be selected in strict accordance with the operation of the electric vehicle.
