The concept of brushless motor

　　The brushless DC motor consists of a motor body and a driver, and is a typical mechatronic product. Since the brushless DC motor operates in a self-controlled manner, it does not add an additional starting winding to the rotor like a synchronous motor with heavy load under variable frequency speed regulation, nor does it cause oscillation and out of step when the load changes suddenly. The permanent magnets of brushless DC motors with small and medium capacity are now mostly made of rare earth neodymium iron boron (Nd-Fe-B) materials with high magnetic energy levels. Therefore, the volume of the rare earth permanent magnet brushless motor is reduced by one frame size compared with the three-phase asynchronous motor with the same capacity.

　　A brushless DC motor, also known as an electronically commutated motor (ECM or EC motor) or a synchronous DC motor, is a type of synchronous motor that uses a direct current (DC) power source. The brushless DC motor is essentially a permanent magnet synchronous motor that uses DC power input and uses an inverter to change to a three-phase AC power supply with position feedback.

　　It has the advantages of high reliability, no commutation spark, low mechanical noise, etc. It is widely used in automobiles, home appliances, high-end recording decks, video recorders, electronic instruments and automated office equipment. It combines the advantages of DC motors and AC motors. It not only has the good adjustment performance of DC motors, but also has the advantages of simple structure, no commutation sparks, reliable operation and easy maintenance of AC motors.

　　The upstream of the industrial chain of the motor industry is the suppliers of raw materials such as electrolytic copper (magnet wire), silicon steel, carbon steel, and insulating materials, as well as the suppliers of accessories such as rotors, stators, lifting rings, bearings, commutators, motor bases, and fans. On the downstream side, brushless DC motors are widely used in various application requirements, such as various loads, constant loads and positioning applications in the fields of industrial control, automotive, aviation, automation systems, medical care equipment, etc.

　　Analysis on the Development Status of Brushless Motor Industry

　　With the smooth development of green environmental protection and low-carbon concepts, industrial robots , household appliances and other equipment are becoming more and more energy-efficient, miniaturized and intelligent. Motors, as an important part of executive components, require high precision and fast speed. , high efficiency, therefore, brushless DC motors are widely favored. In recent years, global intelligent manufacturing and development has become one of the main trends. Against the background of the rapid development of intelligent products, the value of brushless motors has been gradually recognized and widely used in intelligent related products. Developing countries represented by China have widely used brushless motors due to their vigorous development of intelligent industries in recent years.

　　Development status of brushless motor industry

　　1. Market size of brushless motor industry in China

　　Developing countries represented by China have vigorously developed intelligent industries in recent years and widely used brushless motors. In 2021, the sales volume of brushless motors in China will reach 49.2 billion yuan.

　　Chart: 2017-2021 Market Size of China's Brushless Motor Industry

　　Data source: Zhongyan Puhua Industry Research Institute

　　2. Development analysis of brushless motor industry in China

　　Compared with traditional brushed motors, brushless DC motors have the characteristics of high efficiency, environmental protection and energy saving, wide speed range, long life, low noise, and small size. With the smooth development of green environmental protection and low-carbon concepts, industrial robots, household appliances and other equipment are becoming more and more energy-efficient, miniaturized and intelligent. Motors, as an important part of executive components, require high precision and fast speed. , high efficiency, therefore, brushless DC motors are widely favored.

　　Under the background of the widespread popularization of the concept of energy saving and environmental protection in the world, high-efficiency energy-saving motors have become the consensus of the development of the global motor industry. Brushless DC motors can realize stepless frequency regulation and speed regulation, have a high energy efficiency conversion rate, and a comprehensive power saving rate of up to 20%-60%. They have begun to be used in white goods such as air conditioners, refrigerators, and washing machines. With the continuous development of high-efficiency DC brushless motor technology, the production cost is showing a downward trend, and it will be widely used in household appliances with large power consumption and high frequency of use in the future.

　　In recent years, global intelligent manufacturing and development has become one of the main trends. Against the background of the rapid development of intelligent products, the value of brushless motors has been gradually recognized and widely used in intelligent related products. Developing countries represented by China have widely used brushless motors due to their vigorous development of intelligent industries in recent years.

　　In the field of white goods, with the improvement of the energy efficiency level of air conditioners, inverter air conditioners have gradually occupied the mainstream of the market. The increase in the production of inverter air conditioners and the increase in the proportion of inverter air conditioners using DC brushless motors have greatly promoted the application of DC brushless motors. In terms of product prices, due to the decline in raw material prices and the effect of large-scale production, the cost of brushless DC motors is currently declining, and its cost-effective disadvantages are changing, and market acceptance continues to increase, thereby further expanding the market application of brushless DC motors scale. With the implementation of my country's energy-saving and emission-reduction policies, the brushless DC motor market has developed with an average annual growth rate of more than 15%.

　　3. Development Analysis of Chinese Brushless Motor Enterprises

　　At present, my country's motor manufacturers are divided into state-owned (including state-owned holdings), foreign-funded (including foreign-owned holdings) and private enterprises. However, in the large and medium-sized motor manufacturing industry, state-owned enterprises and private enterprises occupy an absolute dominant position. Foreign-funded enterprises have only played a certain role in promoting the improvement of my country's motor manufacturing technology and output. They mainly rely on domestic production cost advantages to face overseas markets. Sales.

　　State-owned manufacturers mainly include Shanghai Electric Group Shanghai Electric Machinery Co., Ltd., Harbin Electric Power Equipment Co., Ltd., Xiangtan Electric Co., Ltd., etc.; private enterprises mainly include our company, Nanyang Explosion-proof Group Co., Ltd. Including joint ventures or sole proprietorships established by companies such as General Electric (GE), Siemens (Siemens), and abb in my country.

　　From a series of laws, regulations and policies promulgated by the state, it can be seen that the state encourages the development and production of products such as brush motors during the "14th Five-Year Plan" period and in the medium and long-term development strategic planning, which contributes to the continuous and rapid development of the brushless motor industry. Development provides favorable policy support. In addition, with the advancement of "Made in China 2025", the large-scale application of smart devices will provide a broad space for the development of the industry.