Motors and their systems are widely used in many industries and fields such as energy, chemical industry, metallurgy, petrochemical, chemical industry, coal, building materials, public facilities, household appliances and electric drive in China, and are the foundation of my country's industrial base. According to statistics, the number of electric motors in my country is about 1.9 billion kW, and the total power consumption is about 3.8 trillion kWh, accounting for 64% of the total electricity consumption of the whole society. 75% of industrial electricity is a veritable "big consumer of electricity". According to statistics, there are about 2,000 small and medium-sized motor industry enterprises in my country, of which 300 are key enterprises in the industry, with more than 300,000 employees.

The huge holdings of motors and the huge industrial market fully demonstrate that motors and systems have an irreplaceable important position and role in the development of the national economy and society. Motor system energy conservation is a field of high concern and key research in the world today, and it is also a key focus area for the implementation of the established national policy of energy conservation and emission reduction in my country during the "Eleventh Five-Year Plan" and "Twelfth Five-Year Plan" period. With the rapid growth of global energy consumption year by year, energy conservation, consumption reduction, emission reduction, and reduction of greenhouse gas emissions have become a major focus of global concern. Small and medium-sized motor systems themselves account for a high proportion of energy consumption and have huge energy-saving potential. Consensus of governments and international organizations.

The motor is a machine manufactured according to the law of electromagnetic induction, which is mainly used to realize the mutual conversion between electrical energy and mechanical energy. According to the process of conversion between electrical energy and mechanical energy, motors can be divided into two categories: generators and motors: generators convert mechanical energy into electrical energy, and transmit electrical energy to the grid or electrical equipment; while motors convert electrical energy into mechanical energy and send electrical energy to electrical equipment. The mechanical system outputs power. The generator system is mostly composed of large-scale synchronous generators, with a large single power and a small overall number; small synchronous generators are mostly used in emergency power or distributed energy systems, and their proportion is small. The AC motor has become a key target for motor and system energy saving due to its wide application range and large production capacity.

As the foundation of my country's industrial base, the importance of motors and systems in the national economy is self-evident, and the energy consumption of motors and systems accounts for a high proportion of my country's total energy consumption, which also determines the energy-saving work of motors and systems. important position. Although the complexity of the motor and its system itself, the professionalism of the motor energy-saving technology, and the continuity of the motor system energy-saving policy have caused great difficulties in promoting the implementation of the motor system energy-saving project, as long as the motor manufacturers, energy-saving service agencies and Due to the active nature of industrial enterprises, the government can actively carry out policy guidance, establish industry models, strengthen inter-departmental cooperation, strengthen supervision, and gradually advance, so as to achieve the predetermined goal of improving the energy efficiency of my country's electric motors as soon as possible, and make due efforts to achieve my country's energy conservation and emission reduction goals. contribution.