Inventory the main application areas of electric motors

Electric motors are widely used in the following seven major fields:

1. Electric servo transmission field

In situations where speed control and position control (servo) are required, the application of special motors is becoming increasingly widespread. Switched reluctance motors, permanent magnet brushless DC motors, stepper motors, permanent magnet AC servo motors, permanent magnet DC motors, etc. have been widely used in fields such as CNC machine tools, industrial electrical automation, automatic production lines, industrial robots, and various military and civilian equipment. For example, the application of AC servo motor drive system in intaglio printing machine has achieved extremely high synchronization and coordination with its high control accuracy, making this printing equipment have the advantages of high automation, high registration accuracy, large printing range, low production cost, energy saving, convenient maintenance, etc. In industrial sewing machines, with the widespread use of permanent magnet AC servo motor control systems, brushless DC motor control systems, and hybrid stepper motor control systems, industrial sewing machines are rapidly developing towards automation, intelligence, compounding, integration, efficiency, oil-free, high-speed, and direct drive.

2. Information processing field

Information technology and the information industry are centered around microelectronics technology, led by communication and networks, and based on computers and software. Information products and semiconductor manufacturing equipment that support the information age, electronic devices (including information input, storage, processing, output, transmission, and other links), as well as communication equipment (such as hard drives, optical disk drives, floppy disk drives, printers, fax machines, copiers, mobile phones, etc.) use a large variety of special motors. The information industry has received high attention both domestically and internationally, and has achieved rapid development. The annual demand for special motors supporting the information field is about 1.5 billion units (sets) worldwide. The vast majority of these motors are permanent magnet DC motors, brushless DC motors, stepper motors, single-phase induction motors, synchronous motors, linear motors, etc.

3. Transportation field

At present, in high-end cars, in order to control fuel, improve ride comfort, and display device status, 40-50 electric motors are used, while luxury cars can have more than 80 electric motors. The main supporting motors for automotive electrical equipment are permanent magnet DC motors, permanent magnet stepper motors, brushless DC motors, etc. As a green transportation tool in the 21st century, electric vehicles have received widespread attention in various countries. The main motors used for driving electric vehicles are high-power permanent magnet brushless DC motors, permanent magnet synchronous motors, switched reluctance motors, etc. The development trend of these types of motors is high efficiency, high output, and intelligence. In recent years, domestic electric bicycles have developed rapidly, mainly driven by wire wound permanent magnet DC motors and permanent magnet brushless DC motors; In addition, special motors have also been widely used in locomotive driving and ship propulsion, such as linear motors for driving maglev trains and subway trains.

4. Home appliance field

At present, about 50~100 special motors are used in ordinary families in industrialized countries. The main types of motors are: permanent magnet DC motors, single-phase induction motors, universal motor, stepping motors, brushless DC motors, AC servo motors, etc. In order to meet the increasing demands of users and adapt to the development of the information age, achieve energy-saving of household appliance products, comfortable, networked, and intelligent job search platforms in the motor industry, and the replacement cycle of household appliances is fast, the requirements for high efficiency, low noise, low vibration, low price, adjustable speed, and intelligence of supporting motors are put forward. The electric motors used in the household appliance industry are being updated, and household appliances driven by high-efficiency permanent magnet brushless DC motors are representing the direction of the development of the household appliance industry. Currently, the popular high-efficiency energy-saving variable frequency air conditioners and refrigerators use permanent magnet brushless DC motors to drive their compressors and fans. The washing machine adopts a low noise multipole flat permanent magnet brushless DC motor, which can directly drive the drum without the original mechanical reducer and achieve stepless speed regulation. It is currently a high-end product in the washing machine. Permanent magnet brushless DC motor is used in the vacuum cleaner to replace the original single-phase universal motor, which has the advantages of small size, high efficiency, low noise, long life and so on.

5. Consumer Electronics

The main supporting motors for audiovisual equipment such as record players, tape recorders, VCD discs, and DVD discs, as well as high-end intelligent toys and entertainment fitness equipment, are permanent magnet DC motors, printed winding motors, wire wound disc motors, brushless DC motors, etc. The demand for electronic consumer goods such as video recorders, cameras, and digital cameras is high, and product updates are fast. These products are equipped with precision motors, which are difficult to manufacture and process. Especially after entering digitalization, new and higher requirements are put forward for motors.

6. In the field of national defense, there are a wide range of military special motors and components, with nearly 10000 varieties and specifications. Their basic functions include: mechanical position sensing and indication, signal transformation and calculation, motion speed detection and feedback, motion device driving and positioning, precise servo control of speed, acceleration, and position, timing standards, and low-power power supply. Based on its special performance, special functions, and special working environment requirements, it has extensively absorbed the latest technological achievements of relevant disciplines, especially the application of new technologies, materials, and processes, giving birth to many new structures and principles of motors, with distinct characteristics of miniaturization, digitization, multifunctional, intelligent, systematic, and networked. Traditional torpedo actuators use a hydraulic mechanical drive system to drive the rudder surface, providing three-axis power for the torpedo to control heading, depth, and roll, achieving the designed torpedo trajectory; At present, new types of torpedoes both domestically and internationally have adopted electric servo motors. In the early days, brush DC servo motors were mostly used, but the inherent shortcomings of brush servo motors have brought many problems to the reliable operation of the electric servo system. The application of rare earth permanent magnet brushless DC motors with small size, light weight, high power density, high force and energy indicators, and good servo performance and dynamic characteristics meets the special requirements of the torpedo servo system. The current key application and development of special motors in the field of national defense is the permanent magnet AC servo system; Permanent magnet brushless DC motor; High frequency and high-precision dual channel rotary transformer; Micro, light, thin permanent magnet DC torque motor; High precision angle sensing motor; Stepping motor and driver; Low inertia DC servo motor; Permanent magnet DC torque tachometer unit; Drive motor acceleration and deceleration components; Ultrasonic motor; Linear and direct drive motors, etc.

7. Special purpose fields. Various aircraft, detectors, automation equipment, medical equipment, and other motors used in special fields are mostly special motors or new types of motors, including motors that differ from general electromagnetic principles in principle, structure, and operation. The main types of motors are low-speed synchronous motors, harmonic motors, limited angle motors, ultrasonic motors, microwave motors, capacitive motors, etc Electrostatic motors, etc. For example, applying an ultra-thin ultrasonic motor with a thickness of 0.4 mm to a micro helicopter; Apply micro ultrasonic motors to the camera system of mobile phones.