摘要
从效率角度分析了变频调速原理,论述了一种能够实现高效率交流电机调速的P理论及相应的变频调速的功率控制原理。指出了变压器、绝缘栅极型功率管(IGBT)直接串联、多电平串联3种高压变频方案的优缺点,分析了高压变频调速方案的可靠性。经对变频调速中击穿IGBT的解剖研究,得出基于IGBT变流器件变频调速不适宜(6~10kV)高压大功率异步机。对于高压的交流调速,基于转子的低压控制应该引起充分的重视。
This paper analyses the principle of frequency-changing speed control of AC-motor. A power control theory in realizing high-efficiency in speed control of AC-motor and the corresponding principle of frequency-changing speed control are elaborated. High voltage frequency changing scheme including transformer,direct series of IGBT and series of multi-electric level are reviewed. The reliability of the scheme is also analszed and the punctured IGBT is dissected. It is concluded that frequency-changing speed control with IGBT is not applicable to high voltage (6 - 10 kV)AC-motor. Consequently low voltage control of rotor calls for adequate attention for high voltage speed control of AC-motor.
出处
《北京机械工业学院学报》
2008年第2期28-31,共4页
Journal of Beijing Institute of Machinery
基金
北京市教育委员会科技计划重点项目/北京市自然科学基金重点项目(KZ200710772015)
北京市属市管高等学校"拔尖创新人才计划"项目
关键词
调速
功率控制原理
变频调速原理
高压变频调速方案
可靠性
adjustable speed
principle of power control
principle of frequency changing speed control
frequency changing speed control scheme of high voltage
reliability