Introduction: At present, the types of motors used in vehicle wheel drive can be roughly divided into four categories: DC brush motors, AC induction motors, brushless DC motors, reluctance motors, etc. After practice, it is believed that brushless DC motors have obvious advantages.
The applications of high-power brushless DC motors in the automotive industry currently mainly include wheel drives, air-conditioning compressors, air-conditioning blowers, purifiers, and air extractors.
1. Brushless DC motor for vehicle wheel drive
At present, the types of motors used in vehicle wheel drive can be roughly divided into four categories: DC brush motors, AC induction motors, brushless DC motors, reluctance motors, etc. After practice, it is believed that brushless DC motors have obvious advantages. The four of the electric vehicle are directly driven by four independent wheeled motors. The inverter is used for electronic commutation, and the mechanical commutator and brushes are eliminated. This structure is convenient for high-speed operation and does not affect the motor body when changing tires. , very simple and convenient.
2. Brushless DC motors for automotive air conditioners
The development of a low-voltage and high-current type brushless DC motor for automotive air conditioners can solve the shortcomings of the original brushless DC motor, such as high noise, short life and difficult maintenance, and improve the performance of the motor. Its rated voltage is 2V, which adds difficulties to the design of brushless DC motors due to the limited structure. The stator punching piece is a 2-slot structure. Since it is a low-voltage and high-current type, in order to ensure that the current density does not converge too high, double-wire winding is adopted to reduce the diameter of the wire; The rare earth permanent magnet material NdFeB is selected. Due to the high remanence and coercivity of NdFeB and the short magnetization direction, the permanent magnet adopts radial tile type.
3. Brushless DC motor for car purifier
Car purifiers mostly use brushless DC motors to drive centrifugal fan 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 easily wound around the core teeth. The motor is made of an outer rotor structure, and the stator and stator windings are placed inside the rotor. The commutation drive circuit adopts an application-specific integrated circuit (ASIC), the circuit is simple, and it has the function of control and protection.
The above is the whole content of the application of high-power brushless DC motors in the automotive industry, I hope to help friends better understand brushless DC motors. Of course, friends who want to communicate or do not understand can also call us for consultation. Taizhao Intelligent Control brushless DC motors are widely used in electric bicycles, inverter air conditioners, washing machines, drones, automobiles, CNC machine tools, polishing and grinding equipment, packaging machinery, tools, gates, industrial control, medical machinery, automation, AGV Motion control fields such as trolleys, aerospace and intelligent storage equipment.
Post time: May-12-2022