Application of micro motors in the automotive industry

With the development of automobile electronics and intelligence, the application of micro motors in automobiles is also increasing. They are mainly used to improve comfort and convenience, such as electric window adjustment, electric seat adjustment, seat ventilation and massage, electric side door opening, electric tailgate, screen rotation, etc. At the same time, it is also used for intelligent and comfortable driving such as electric power steering, electric parking, brake auxiliary motor, etc., as well as intelligent precision control such as electronic water pump, electric air outlet, windshield cleaning pump, etc. In recent years, electric tailgates, electric door handles, screen rotation and other functions have gradually become standard configurations of new energy vehicles, showing the importance of micro motors in the automotive industry.

Application status of micro motors in the automotive industry
1. Light, thin and compact
The shape of automotive micro motors is developing in the direction of flat, disc-shaped, lightweight and short to adapt to the needs of specific automotive environments. In order to reduce the overall size, first consider using high-performance NdFeB permanent magnet materials. For example, the magnet weight of a 1000W ferrite starter is 220g. Using NdFeB magnet, its weight is only 68g. The starter motor and generator are designed into one unit, which reduces the weight by half compared to separate units. 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. Flat permanent magnet stepper motors can be used in various electronic devices such as car speedometers and taximeters. 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. Efficiency
For example, after the wiper motor has improved the reducer structure, the load on the motor bearings has been greatly reduced (by 95%), the volume has been reduced, the weight has been reduced by 36%, and the motor torque has been increased by 25%. At present, most automotive micro motors use ferrite magnets. As the cost performance of NdFeB magnets improves, they will replace ferrite magnets, making automotive micro motors lighter and more efficient.

3. Brushless

In accordance with the requirements of automobile control and drive automation, reducing failure rates, and eliminating radio interference, with the support of high-performance permanent magnet materials, power electronics technology, and microelectronics technology, permanent magnet DC motors of various specifications widely used in automobiles will be Development in the direction of brushing.

4. DSP-based motor control

In high-end and luxury cars, micro motors controlled by DSP (some use electronic The control part is placed in the end cover of the motor to integrate the control unit and the motor). By understanding how many micro-motors a car is equipped with, we can observe the level of configuration and comfort and luxury of the car. In today’s period of rapid expansion of automobile demand, the application range of automobile micro motors is getting wider and wider, and the entry of foreign capital has also made the competition in the micro motor industry intensified. However, these phenomena can illustrate that the development of automobile micro motors The development prospects are broad, and micro motors will also make great achievements in the field of automotive electronics.