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本文论述用以供应静止负载和电机的自控式静变频器,这种变频器使一定频率和电压幅值的三相电网转换为连续可变频率和电压幅值的三相系统。文中指出自控式换流器采用脈冲频率有关的负脈冲技术,假设包括变频器的自控式换流器和输出电压主谐波频率按整数倍数关系触发,则能够产生相对高的基波频率。电压幅值和相位的调制程度取决于换流器脈冲频率和输出基本频率的非整数比,文中论及三相换流器输出电压和各种触发方法下,基本幅值与谐波幅值对实际输出电压与最高输出电压之比和由于静变频器供应谐波电流而附加于电机的热损失的关系。
This article discusses a self-controlled static frequency inverter that supplies static loads and motors that convert a three-phase grid at a certain frequency and voltage amplitude into a three-phase system with continuously variable frequency and voltage amplitude. The article points out that the self-control inverter uses the negative pulse technology related to the pulse frequency. Assuming that the inverter including the inverter and the main harmonic frequency of the output voltage are triggered by integer multiples, the relatively high fundamental frequency . The modulation degree of voltage amplitude and phase depends on the non-integer ratio of inverter’s pulse frequency and output basic frequency. In the paper, the output voltage of three-phase converter and various trigger methods, the basic amplitude and harmonic amplitude The relationship between the ratio of the actual output voltage to the maximum output voltage and the heat loss added to the motor due to the supply of the harmonic current to the inverter.