Research On Topology And Control Strategy On A Novel Single Stage Boost Inverter

With the fast development and application of electric vehicle driver, hybrid power, integrated starter/generator, as well as the renewable energy generation, the performance and reliability of power electronics inverter, et al. have been given increasing emphasis. Particularly, the inverter should adapt to the low voltage and/or large ripple of input DC power supply, and have the capacity to boost and invert.To meet these requirements, a novel single stage boost inverter (SSBI) is proposed in this paper. Combined with the technique of coupled inductor energy storage and transfer boost, the shoot-through zero vector is also employed to regulate the bus voltage, which make SSBI quite suitable for the application of inverting and the adjustment of DC bus voltage. Firstly, the working principles of SSBI under the conditions of low and high boost requirement are investigated in detail. Secondly, based on traditional SPWM and SVPWM control technologies, the control strategy for the novel SSBI is presented. Thirdly, the simulation works using Saber is developed for the control of DC bus voltage open-loop and closed loop. Finally, hardware circuit platform is built, and High Performance-cost Ratio digital Signal Controller is employed, which realizes the boost control for the novel SSBI.Based on Freescale DSP 8037, the hardware platform and control system for this novel SSBI are developed. Detailed designs to the hardware and software are described in this paper. Experimental results from the prototype are shown to verify the unique boost and invert capacity of the the novel SSBI.