High-speed motor inverter using DC/DC converter

In order to overcome the low voltage problem associated with the storage battery of start-up inverter in a distributed power system, a DC/DC reverse polarity chopper circuit is proposed for increasing voltage. It can not only adjust voltage, but also reduce the number of batteries used. In addition, the space vector pulse width modulation (SVPWM) control strategy is used as the control algorithm, which reduces harmonic waves and improves efficiency in power conversion. The vector is decomposed in α、β coordinate system. The interaction time of the vector is obtained from the matrix data table. In this case, it simplifies calculation and improves its calculation precision. At the same time, the system real-time performance is warranted. The design of digital pulse width modulation inverter system is presented in this paper. Digital Signal Processor (DSP) TMS320LF2407 is used as a control CPU in this system to improve system real-time performance. The experimental and simulation results of the proposed strategy prove its feasibility.