In this paper,a novel pulse density modulation(PDM)with semi-bridgeless active rectifier(S-BAR)in inductive power transfer(IPT)system for rail vehicle is proposed.It is to reduce switching losses of the active rectifi...In this paper,a novel pulse density modulation(PDM)with semi-bridgeless active rectifier(S-BAR)in inductive power transfer(IPT)system for rail vehicle is proposed.It is to reduce switching losses of the active rectifier in pickups.In the control method,the insulated-gate bipolar transistors(IGBTs)in the S-BAR are controlled by synchronous PDM signals,so that zero-voltage switching(ZVS)and zero-current switching(ZCS)can be achieved in the whole output power range.The output power is regulated by changing the pulse density(PD)of the S-BAR since the it is almost linear proportional with the PD in high quality factor of pickup side.The communication device between the primary side and pickup side is not necessary anymore.The detailed theoretical analyses of the PDM method are provided,and its advantages are shown in a 7.5kW IPT prototype for rail vehicle.The experimental results are presented to verify the analysis and demonstrate the performance.The overall efficiency of the system by PDM control is 74.2%which is improved by 4%compared with phase shift(PS)control at light load.展开更多
研究了基于脉冲密度调制(Pulse Density Modulation)控制策略的串联谐振逆变电晕处理电源。PDM的基本思想是在一定的调功周期内使交流输出端产生方波电压或者是零电平电压,这样即使电晕放电负载具有很强的非线性也可以宽范围内控制功率...研究了基于脉冲密度调制(Pulse Density Modulation)控制策略的串联谐振逆变电晕处理电源。PDM的基本思想是在一定的调功周期内使交流输出端产生方波电压或者是零电平电压,这样即使电晕放电负载具有很强的非线性也可以宽范围内控制功率输出。对于该电晕处理电源进行了仿真与实验,所得结果验证了理论分析。展开更多
文摘In this paper,a novel pulse density modulation(PDM)with semi-bridgeless active rectifier(S-BAR)in inductive power transfer(IPT)system for rail vehicle is proposed.It is to reduce switching losses of the active rectifier in pickups.In the control method,the insulated-gate bipolar transistors(IGBTs)in the S-BAR are controlled by synchronous PDM signals,so that zero-voltage switching(ZVS)and zero-current switching(ZCS)can be achieved in the whole output power range.The output power is regulated by changing the pulse density(PD)of the S-BAR since the it is almost linear proportional with the PD in high quality factor of pickup side.The communication device between the primary side and pickup side is not necessary anymore.The detailed theoretical analyses of the PDM method are provided,and its advantages are shown in a 7.5kW IPT prototype for rail vehicle.The experimental results are presented to verify the analysis and demonstrate the performance.The overall efficiency of the system by PDM control is 74.2%which is improved by 4%compared with phase shift(PS)control at light load.
文摘研究了基于脉冲密度调制(Pulse Density Modulation)控制策略的串联谐振逆变电晕处理电源。PDM的基本思想是在一定的调功周期内使交流输出端产生方波电压或者是零电平电压,这样即使电晕放电负载具有很强的非线性也可以宽范围内控制功率输出。对于该电晕处理电源进行了仿真与实验,所得结果验证了理论分析。
