The use of miniature electric motors in automobiles

The use of a miniature motor in an automobile The role of a motor is to convert electrical energy into mechanical energy that drives the operation of the device. In the car, except for the starter that starts the engine, all the motors that are distributed in various parts of the car are miniature motors. In the past, automotive micromotors were used only as power sources for wiper assemblies, windshield washers, electric oil pumps, and automatic antenna assemblies. Nowadays, the sedan is pursuing passenger comfort and automatic maneuverability. Micro-motors have become an indispensable part of modern cars. Some cars have more than 20 miniature motors installed. The movable equipment usually has a miniature motor as its power source whether it is doing round-the-week motions, or making horizontal swings, or making linear movements. For example, the position of the electric seat cushion moves, the angle of the backrest and the headrest changes, the swing of the rearview mirror, the washing of the headlight, the opening and closing of the window, the operation of the electric vehicle door lock, the rotation of the radiator cooling fan, and the like. Automotive micro-motors, as their name implies, are miniaturized DC motors, which typically have a power of less than 100 watts. Due to the special requirements of the car's operation and the harsh environment, the user's requirements for the car's micro-motors are demanding. For the motor, the key to the quality of the motor is the magnetic material of the movement, in addition to the design structure and processing technology. At present, the new motor used in cars uses a permanent magnet material containing rare elements. Its main components are iron, boron, bismuth, etc. Its magic lies in the strong magnetism, no matter what shape it is processed into, the magnetic properties are better than ordinary ones. The ferromagnetic material is 2 to 10 times stronger, which means that the motor made of this kind of permanent magnet material has large power, small size, light weight, and high efficiency. The micro-motor is used in a large number on the vehicle and the weight of the whole vehicle is relatively reduced. , is equal to improve the carrying capacity. Roger Smith, the former president of General Motors, once said that nowadays the automotive industry cannot do without electromagnetic materials. For industries using magnetic materials, electromagnetic materials are as important as semiconductor materials for the electronics industry. Each of the major breakthroughs may change our lives. The responsibility of the micro-motors of automobiles is to drive the movement of equipment. Therefore, a set of conversion mechanisms is generally required to perform deceleration and change of direction. For example, the wiper motor servo mechanism adopts a worm gear drive mode to decelerate and change the rotation of the electric axis. The central control door lock motor adopts a rack and pinion transmission mode, which serves to decelerate and change the rotation into a linear movement. These forms are more commonly used transformation mechanisms. The use of micro-motors in modern cars is increasing. Micro-motors must be used in some cars' ABS systems, electronically controlled suspension systems, electronically controlled power steering and electronic throttles. With the development of automotive electronics, micro-motors are becoming increasingly important.