What is the difference of energy efficient motors and variable frequency energy-saving motors? Which is more effective? 1, energy efficient motors is to improve the operational efficiency of the motor through the manufacturing process itself, or that is to improve the energy conversion ratio. 2, the frequency energy is through adjusting the motor speed to conserve electricity, energy conversion ratio has not only failed to improve, but reduced, because of the increased loss of the drive. 3, frequency control is mainly used for load variations of the occasion, the energy saving effect is very obvious, typical is the constant pressure water supply system. Simply, it is the energy saving principles needed to change the frequency, and then change the output power. Let's say, just 5kW of power, if not control, the motor may 10kW power output, wasted 5kW. 4, where the load stable, that is, without the governor's case, the drive will reduce the overall efficiency of the use of high-efficiency motors, but a waste of electricity. 5, load changes big occasions, both of which can power, however, frequency control can save energy much larger proportion. Energy efficient motors, compared with the same power of ordinary motor, improve energy efficiency generally only a few percentage points. 6, the drive motor, said inverter motor powered with General Motors differentiated product line of energy efficient motors, inverter direct drive ordinary motor, motor damage. 7, two different energy conservation principle, the two can be used simultaneously, the two technologies are required to develop and promote China joined WTO, enormous competitive pressures and challenges faced by China's motor industry, the international community is increasing. From the international and domestic development trend, China to promote high-efficiency motors is very necessary ie3 ultra-efficient motors, which is the product development requirements, so that our electric motor products to keep up with the international trend, but also conducive to promoting technological progress and export needs. According to statistics, in 2002 China's motor power consumption accounts for more than 60% of the country, where three small power consumption accounts for about 35% of the induction motor is power-hungry, so the development of China's high efficiency motors is an important measure to improve energy efficiency one, to meet the needs of China's development is very necessary. ie2 efficient motor _ Dresdner Cheung (certified) _ efficient motor is provided by Andrew Motor Manufacturing Co., Ltd., Zhengzhou Dresdner. Zhengzhou Dresdner Cheung Motor Manufacturing Co. (www.deshengxiangmotor.com) (www.deshengxaingmotor.com) is Zhengzhou, asynchronous motor leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, the maximum to meet customer needs. Cheung at Dresdner leadership with the staff warmly welcome all inquiries negotiations to create a better future for Dresdner Cheung.