刘姜涛,邓其军,陈晶,李帅齐.输入串联输出等效并联多逆变器驱动的高压大功率无线电能传输系统研究[J].电测与仪表,2020,57(5):67-75. Liu jiangtao,Deng qijun,cheng jing,Li shuaiqi.Research on High Voltage and High Power Inductive Power Transfer System Driven by Input-Series Output-Equivalent-Parallel Inverter[J].Electrical Measurement & Instrumentation,2020,57(5):67-75.
Research on High Voltage and High Power Inductive Power Transfer System Driven by Input-Series Output-Equivalent-Parallel Inverter
One of the possible solutions providing higher power inductive power transfer is to improve the voltage level of the DC source feeding the inverter. The rated voltage of common switches, however, is limited, which couldn"t undertake the high input DC voltage. Hence, a high voltage together with high power inductive power transfer (IPT) system driven by an input-series output-equivalent-parallel topology is proposed in the paper.. For the topology, the high DC voltage is undertaken by multiple inverters connected in series while each inverter drives a independent primary coil to transfer energy to a common secondary coil. Parameters of the system resonant loops are designed with considering the coupling inductances between primary coils. System output characters, including the output current and power are analyzed under zero phase angles (ZPA) as well as none-ZPA. The analysis shows that the product of the operating angular frequency and the coupling inductance between the primary coil and the secondary coil has significant influence on the output current and power. A laboratory prototype driven by three inverters connected in series has been built to verify the theoretical analysis. The maximum experimental transferred power is 38.4 kW with DC-DC efficiency of 88.7% under a 750 V input DC voltage.