CAJ | 학술논문

传统的感应电能传输(inductive power transfer,IPT)系统采用单相全桥谐振逆变器,由于受到功率器件的容量限制,IPT系统的输出功率较低.为实现IPT系统大功率输出,构建了基于阶梯波移相合成方法的级联型多电平逆变器的IPT系统,并详细分析其工作原理和功率自平衡特性.在此基础上,建立谐波消除方程,得到移相角与脉宽的显式解,从而避免求解高次超越方程.在消除3次谐波的基础上,通过改变移相角与脉宽,不需增加DC-DC环节便能实现IPT系统输出功率的连续调节.仿真和实验验证了IPT系统的级联型逆变器输出功率为1.6 kW时,每个全桥单元的输出功率约为800 W,且级联逆变器的输出电压的3次谐波被完全消除,同时能连续调节IPT系统的功率.这种基于阶梯波移相合成方法的级联型多电平逆变器可望在大功率 IPT 系统中得到应用.
전통적감응전능전수(inductive power transfer,IPT)계통채용단상전교해진역변기,유우수도공솔기건적용량한제,IPT계통적수출공솔교저.위실현IPT계통대공솔수출,구건료기우계제파이상합성방법적급련형다전평역변기적IPT계통,병상세분석기공작원리화공솔자평형특성.재차기출상,건립해파소제방정,득도이상각여맥관적현식해,종이피면구해고차초월방정.재소제3차해파적기출상,통과개변이상각여맥관,불수증가DC-DC배절편능실현IPT계통수출공솔적련속조절.방진화실험험증료IPT계통적급련형역변기수출공솔위1.6 kW시,매개전교단원적수출공솔약위800 W,차급련역변기적수출전압적3차해파피완전소제,동시능련속조절IPT계통적공솔.저충기우계제파이상합성방법적급련형다전평역변기가망재대공솔 IPT 계통중득도응용.
The power capacity of the single-phase H-bridge inverter used in the traditional IPT (Inductive Power Transfer) systems is limited by the constraint of the power electronic devices. A novel staircase waveform method employed in the cascaded multilevel inverter was proposed in this paper to enhance the system's power capacity. By analyzing its working principle in detail, the power auto balance characteristic can be achieved. The explicit solutions of phase-shift angle and pulse width are given by solving harmonic elimination equation to avoid solving high transcendental equations. This approach not only can eliminate the 3rd harmonic, but also can continuously regulate the output voltage in order to control the output power of IPT systems by altering the phase-shift angle and pulse width without DC-DC devices. The performance of the proposed method was evaluated by the simulation and experimentation with 1.6kW maximum output power, e.g. 800W per bridge. The output power of cascaded inverters could be regulated continually without the 3rd harmonic. This staircase waveform method based cascaded inverters is suitable for the high power IPT application.