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随着电力电子技术、微电子技术及大规模集成电路的发展,生产工艺的改进及功率半导体器件价格的降低,节能降耗的交流变频调速技术越来越被工业与民用所广泛采用。我国政府承诺在2020年单位GDP的CO2排放比2005年下降40%～45%,而节能减排是一
With the development of power electronic technology, microelectronics technology and large scale integrated circuit, the improvement of production technology and the reduction of the price of power semiconductor devices, AC variable frequency speed regulation technology with energy saving and consumption reduction is widely adopted by industry and civil. Our government promises to reduce the CO2 emission per unit of GDP by 40% -45% from that of 2005 by 2020, while energy saving and emission reduction is one