Application of rare earth permanent magnet in DC motor with no speed regulation

Motor to electric energy conversion into mechanical energy is good or bad, in relation to the electricity is able to make full use of, in relation to the driven equipment efficiency and operation conditions, so people have been constantly developed to meet the requirement of the electric motor. Looking back on the development of the motor, the people have been working hard for the progress of the motor from the DC motor to the AC motor. Until the emergence of the permanent magnet, people began to produce rare earth permanent magnet motor won the support of advanced materials, but also led to the improvement of relevant industrial products, so that mechanical and electrical integration has reached the level of updating.

After many years of research and application of the rare earth permanent magnet motor and control system, the Chinese Academy of launch vehicle technology has successfully applied the rare earth permanent magnet motor in the rocket and missile. The spirit of "military legislative yuan, civilian promotes a courtyard" the strategic policy, Beijing Wanyuan industry companies in the overall steady development at the same time, pay more attention to play to their advantage in scientific research and production, continue to explore, develop new fields, the military mature high technology applied to civilian industry field, the company will organize a strong research team and put a lot of manpower and material resources in the development of rare earth permanent magnet wind turbine generator, light rail with rare earth permanent magnet motor and oil mining rare earth permanent magnet motor at the same time, development and production of large power rare earth permanent magnet DC non brush motor.

Rare earth permanent magnet brushless DC motor is a product of the combination of modern materials science, electronic power science and motor control theory. Rare earth permanent magnet motor is the rare earth permanent magnetic materials produces a magnetic field, instead of the traditional motor by the exciting current generated magnetic field, so as to make the rare earth permanent magnet motor has simple structure, reliable operation, small size, light weight, low loss, high efficiency, the shape and size of motor can be flexible and other notable features, so rare earth permanent magnet motor in recent years develops very quickly. Because it is rich in rare earth resources in our country, rapid development of rare earth permanent magnet in China, making rare earth permanent magnetic materials continue to improve product quality and cost continue to lower prices, and laid a solid foundation for manufacturing large power rate of rare earth permanent magnet motor, we developed the rare earth permanent magnet motor in domestic and foreign market is bound to have a certain competitive advantage.

China is now the world's largest elevator consumer, with the continuous development of China's national economy and improve, the demand for high performance of the elevator is almost a step to expand. But now the high speed, high performance of the elevator host basically rely on imports. In order to develop China's rare earth resources, the expansion of rare earth permanent magnet in the domestic market, our company technology innovation center is vigorously development of rare earth permanent magnet DC non brush motor, application in the system of elevator machine, the system performance in leading position in the world, compared with the traditional elevator system energy-saving of about 40%, is an ideal upgrade product of homebred elevator hosts for the production of. The outstanding features of the system are: wide speed range, will reach more than 1000:1, compared with the current advanced AC VVVF inverter system with high performance. Start, operation and control of the elevator is more stable, can achieve high precision control. The motor has the characteristics of low rotational speed, large torque, high power factor, small size, low requirement to the supporting environment and obvious energy saving effect. The entire elevator system operating noise and vibration is very small, running smoothly, in accordance with the requirements of human comfort. Due to the inherent characteristics of the permanent magnet motor, when a sudden power outage, with the ability to self - locking, so that the elevator is more safe and reliable operation. Because of the characteristic of low speed and high torque, the main structure of the elevator is simple and easy to maintain. The development of this product will make our country's elevator industry enter a new historical stage.