摘要
当电动矿用车下坡缓行时,发电机当作电动机使用,柴油机由怠速被拖至高转速。由于交流电动机在旋转时定子有一定的交流电压,当逆变器启动时,相当于交流电源并联运行,并联的一瞬间,需要电源的电压幅值、频率和相位相同。通过外部转速传感器间接检测转子频率,以及检测相位过零点时刻的方法来达到定子旋转磁场与转子转速同步的目的,实现发动机反拖平稳启动。此外,设计了一个等比例试验平台,通过试验验证了该方案的简单易行和高可靠性,为实车设计提供了理论和试验依据。
When an electric dump truck is going downhill at a low speed, the diesel engine is dragged from idling speed to high speed by the generator which is used as a motor. Because some AC voltage is produced from the stator at the motor operating, just while the inverter starts, the AC voltage and inerter voltage are operated in parallel, the output of the inerter should be as same as the AC voltage which produced by the motor, such as amplitude, frequency and phase. In the paper, to achieve the synchronous operation of rotation magnetic field of the stator and rotor rotation, inspection of moment when phase crossing zero as well as inspection of rotor frequency based on external speed sensor were applied, so as to realize the steady start-up of the engine. In addition, a full-scale test bench was designed, and the test results demonstrated that the method was simple and highly reliable. The research offered theoretical and test basis for the truck design.
出处
《矿山机械》
北大核心
2013年第2期38-41,共4页
Mining & Processing Equipment
基金
国家"十一五"科技支撑计划(2008BAB32B03)
