The latest economic market analysis of frequency-conversion speed-regulation motor

Abstract: The high-voltage frequency converter is the key device in the motor energy-saving system. China's use of variable-frequency speed control in AC motors is only about 6%. The economic and social benefits of the system are considerable. The annual demand for variable frequency motors is also considerable.

As the key device in the motor energy-saving system, the high-voltage inverter will promote the development of the associated power electronics, automation control, software development, electric motors, fans, casting, smelting, machinery manufacturing and other industries. The downstream application areas include technological advancements in the related industries such as petrochemicals, municipal water supply, metallurgy and iron and steel, electricity and energy, and improvement of control technology levels, improvement of production technology levels, reduction of production costs, and promotion of coordinated development of the entire industrial industrial chain.

At present, China’s total power generation is 200 million kW, about 60% of which is consumed by electric motors, among which wind turbines and water pumps are installed at more than 30 million units, and the power consumption accounts for about 35% of the power generation. Basically, we use baffles to regulate the flow. Serious power consumption. If it is changed to variable frequency speed regulation, the average energy saving rate of a single machine is 30% to 60%. According to 40% calculation, fans and pump equipment account for 35% of the total power consumption, and the total installed capacity is 130 million kW. If 70% of such equipment requires variable load operation, if 50% of them are retrofitted, the conversion rate will be 35%, that is 45.5 million kW, and the annual energy saving will be 52.7 billion kW? h, equivalent to 21.3 million tons of standard coal, the investment recovery period is only 1 to 2 years.

The economic and social benefits of the system are considerable. The annual demand for variable frequency motors is also considerable. China's use of variable frequency speed control in the AC motor is only about 6%, while foreign industrial developed countries have used AC speed control has reached 60% to 70%.

In addition, VVVF has broad application prospects in fields such as metallurgy, mining, petroleum, petrochemical, machinery, light industry, building materials, pharmaceuticals, papermaking, electric power, railways, chemical industry, elevators, home appliances, etc., and will gradually replace DC speed regulation. And other speed adjustment methods in AC speed regulation.