The main applications of high-power brushless DC motors in the automotive industry include wheel drives, air-conditioning compressors, air-conditioning blowers, purifiers, air extractors, etc.

1. Brushless DC motor for automobile wheel drive

At present, the types of motors used to drive vehicle wheels can be roughly divided into four categories: brushed DC motors, AC induction motors, brushless DC motors, reluctance motors, etc. Through practice, brushless DC motors are believed to have obvious advantages. The four wheels of the electric vehicle are directly driven by four independent wheel motors. An inverter is used for electronic commutation, eliminating the mechanical commutator and brushes. This structure facilitates high-speed operation and does not affect the motor body when changing tires. , very simple and convenient.

2. Brushless DC motor for automotive air conditioners

The development of low-voltage and high-current brushless DC motors for automobile air conditioners can solve the shortcomings of the original brushed DC motors such as high noise, short life and difficult maintenance, and improve the operating performance of the motor. Its rated voltage is 2V. Due to its structural limitations, it adds difficulties to the design of brushless DC motors. The stator punching has a 2-slot structure. Since it is a low-voltage and high-current type, in order to ensure that the current density is not too high, double wires are wound in parallel to reduce the wire diameter; the rotor has a 4-pole structure with surface permanent magnets pasted on it. The rare earth permanent magnet material neodymium iron boron is selected. Since the remanence and coercive force of neodymium iron boron are very high and the magnetization direction is short, the permanent magnet adopts radial tile type.

3. Brushless DC motor for car purifier

Car purifiers mostly use brushless DC motors to drive centrifugal blades to discharge dirty air. The brushless DC motor body is determined according to the motor circuit scheme, and a two-phase bridge commutation drive circuit is commonly used. The inner stator winding can be wound around the core teeth more easily. The motor has an outer rotor structure, and the stator and stator windings are placed inside the rotor. The commutation drive circuit uses an application-specific integrated circuit (ASIC), which is simple and has control and protection functions.

The above is all the application scenarios of high-power brushless DC motors in the automotive industry. I hope it can help our friends better understand brushless DC motors. Of course, friends who want to communicate or don’t understand can also call us for consultation. Xinda Motor intelligent control brushless DC motors are widely used in electric bicycles, variable frequency air conditioners, washing machines, drones, automobiles, CNC machine tools, polishing and grinding equipment, packaging machinery, tools, gates, industrial industrial control, medical machinery, automation and AGV Motion control fields such as cars, aerospace, and intelligent warehousing equipment.