变频调速器与节约能源、环境保护（Variable frequency speed regulator and energy saving and environmental protection）.docVIP

变频调速器与节约能源、环境保护（Variable frequency speed regulator and energy saving and environmental protection） Variable frequency speed regulator and energy saving and environmental protection [Abstract] this paper summarizes the major contributions of AC motor variable frequency speed regulation technology to energy saving, environmental protection, manufacturing (production and quality improvement), traffic traction and household appliances. 1 、 variable frequency speed regulation AC motors, especially cage induction motors, have a series of advantages, such as small size, light weight, simple structure, convenient maintenance, low manufacturing cost, low operating cost, reliable operation in harsh environment, etc.. But in the past due to the difficult timing or some inefficient speed is not ideal, therefore, for a long time in the field of control DC speed is still occupied, advantages of AC motor in variable speed drive failed to get to play. Up to the early 70s of last century, with the rapid development of power electronics, Microelectronics (integrated circuit) and microcomputer technology, the frequency converter realized by people has been industrialized for a long time. The so-called 1.1 inverter -- it will three-phase power frequency (50Hz) AC power (or any power) AC power is converted into three-phase voltage adjustable, adjustable frequency, sometimes referred to as the inverter VVVF device VVVF. Mainly used for AC motor (asynchronous machine or synchronous machine) speed adjustment. 1.2 an AC motor variable frequency speed regulation system consists of three parts, including frequency converter, drive, AC motor and controller. The key core equipment is frequency conversion governor, which realizes the smooth change of motor voltage and frequency. 1.3 frequency conversion in the frequency range, the static precision and dynamic quality, system efficiency, perfect protection function, easy to realize automatic control and process control and other aspects of the pa