The application trend of micromotors in the automotive industry

1. Lightweight, short and small

The shape of the automobile micro motor is developing towards flat, disc, light and short to meet the needs of the specific environment of the automobile. In order to reduce the size, first consider the use of high-performance neodymium iron boron permanent magnet materials. For example, the weight of the magnet of a 1000W ferrite starter is 220g, and the weight of neodymium iron boron magnet is only 68g. It adopts the scheme of designing the starter motor and generator into one, which reduces the weight by half compared with the separated weight. DC permanent magnet motors with disc-type wire wound rotors and printed winding rotors have been developed at home and abroad, which can also be used for cooling and ventilation of engine water tanks and air conditioner condensers. The flat permanent magnet stepping motor can be used in a variety of electronic equipment such as automobile speedometers and metering devices. Recently, Japan has introduced an ultra-thin centrifugal fan motor with a thickness of only 20mm and can be installed on a small frame wall. Used for ventilation and cooling in occasions.

2. High efficiency

For example, after the improvement of the structure of the reducer, the wiper motor greatly reduces the load on the motor bearing (reduced by 95%), the size is reduced, the weight is reduced by 36%, and the motor torque is increased by 25%. At present, most of the automotive micro special motors use ferrite magnets. As the cost performance of neodymium iron boron magnets increases, they will replace ferrite magnets, which will surely make the automotive micro special motors more lightweight and more efficient.

3. Brushless

In accordance with the requirements of automobile control and drive automation, reduction of failure rate, elimination of radio interference, etc., with the support of high-performance permanent magnet materials, power electronic technology, and microelectronics technology, the large number of permanent magnet DC motors of various specifications used in automobiles will be Brush the direction of development.

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4. DSPization of motor control

In luxury cars, engine control, automatic speed control, anti-skid brake control, steering control, vehicle floating control, automatic speed conversion control and other systems, all apply micro-motors controlled by DSP (some use electronic control parts). Put it in the end cover of the motor to integrate the control unit and the motor). By knowing how many micro motors are equipped in the car, you can observe the level and luxury of the car configuration. In today's period of rapid expansion of automotive demand, the application range of automotive micro and special motors is becoming wider and wider. The entry of foreign capital has also made the competition in the micro and special motor industry more and more fierce. The development prospects are broad, and micro-special motors will also have a lot to do in the field of automotive electronics.