在感应电能传输(inductive power transfer,IPT)系统中,采用单逆变器供电、多初级LCL线圈并联的分段导轨动态供电方法。但该方法存在以下问题,当电动汽车还在与第一个LCL初级线圈进行耦合时,其余所有并联LCL初级线圈都处于通电状态,且...在感应电能传输(inductive power transfer,IPT)系统中,采用单逆变器供电、多初级LCL线圈并联的分段导轨动态供电方法。但该方法存在以下问题,当电动汽车还在与第一个LCL初级线圈进行耦合时,其余所有并联LCL初级线圈都处于通电状态,且存在较大的初级线圈电流,会带来IPT系统功率损耗以及较大的电磁辐射。针对该问题,本文提出一种含有交流开关的LC网络,通过调节交流开关的通断,进而降低初级线圈电流大小,实现降低系统功率损耗、减少电磁辐射的目的。最后,通过搭建LCL-S的IPT实验系统,模拟电动汽车充电过程,实验结果表明所提方法切实有效地降低了初级线圈电流大小。展开更多
针对感应电能传输(inductive power transfer,IPT)无线充电系统中恒压或恒流输出的相互转换问题,基于LCL/S拓扑电路,提出含变结构中继谐振回路的恒压恒流无线充电系统,利用2个相互解耦的DD型线圈作为中间线圈,与谐振电容器形成谐振回路...针对感应电能传输(inductive power transfer,IPT)无线充电系统中恒压或恒流输出的相互转换问题,基于LCL/S拓扑电路,提出含变结构中继谐振回路的恒压恒流无线充电系统,利用2个相互解耦的DD型线圈作为中间线圈,与谐振电容器形成谐振回路,使用2个交流开关用于系统充电模式的切换,实现独立于负载的恒流和恒压充电。该结构不需要原副边通信以及复杂的控制策略,在充电过程中没有无功功率输入,可获得较高的传输功率和传输效率。为了验证该方法的有效性和可行性,在PSIM中进行电路仿真并搭建实验原理样机,实验结果表明:基于所提方法输出的恒流和恒压随着电池等效负载电阻改变而轻微变化,但仍然满足电池恒流和恒压充电要求。展开更多
This paper deals with an innovative low-loss AC switch, named as TBBS （transistor based bidirectional switch）, based on the association of super-gain BJTs developed by the GREMAN laboratory. The main characterizatio...This paper deals with an innovative low-loss AC switch, named as TBBS （transistor based bidirectional switch）, based on the association of super-gain BJTs developed by the GREMAN laboratory. The main characterization results of the super-gain BJT are reminded to identify the key parameters that are essential to build the TBBS. A complete characterization database in static mode of this new AC switch is discussed. In particular, its forward and reverse-biased features have been measured to see the evolution of the DC current gain as a function of the current density. The TBBS makes sense when using the super-gain BJT （bipolar junction transistor） in reverse mode. It means that the reverse DC current gain has to be sufficient （at least higher than l compared with the conventional BJT one）. This new AC switch is bidirectional in current and voltage, totally controllable （turn-on and turn-off） and the most attractive solution in terms of on-state power losses. Further, its manufacturing process is as easier as existing device such as triac.展开更多
文摘在感应电能传输(inductive power transfer,IPT)系统中,采用单逆变器供电、多初级LCL线圈并联的分段导轨动态供电方法。但该方法存在以下问题,当电动汽车还在与第一个LCL初级线圈进行耦合时,其余所有并联LCL初级线圈都处于通电状态,且存在较大的初级线圈电流,会带来IPT系统功率损耗以及较大的电磁辐射。针对该问题,本文提出一种含有交流开关的LC网络,通过调节交流开关的通断,进而降低初级线圈电流大小,实现降低系统功率损耗、减少电磁辐射的目的。最后,通过搭建LCL-S的IPT实验系统,模拟电动汽车充电过程,实验结果表明所提方法切实有效地降低了初级线圈电流大小。
文摘针对感应电能传输(inductive power transfer,IPT)无线充电系统中恒压或恒流输出的相互转换问题,基于LCL/S拓扑电路,提出含变结构中继谐振回路的恒压恒流无线充电系统,利用2个相互解耦的DD型线圈作为中间线圈,与谐振电容器形成谐振回路,使用2个交流开关用于系统充电模式的切换,实现独立于负载的恒流和恒压充电。该结构不需要原副边通信以及复杂的控制策略,在充电过程中没有无功功率输入,可获得较高的传输功率和传输效率。为了验证该方法的有效性和可行性,在PSIM中进行电路仿真并搭建实验原理样机,实验结果表明:基于所提方法输出的恒流和恒压随着电池等效负载电阻改变而轻微变化,但仍然满足电池恒流和恒压充电要求。
文摘This paper deals with an innovative low-loss AC switch, named as TBBS （transistor based bidirectional switch）, based on the association of super-gain BJTs developed by the GREMAN laboratory. The main characterization results of the super-gain BJT are reminded to identify the key parameters that are essential to build the TBBS. A complete characterization database in static mode of this new AC switch is discussed. In particular, its forward and reverse-biased features have been measured to see the evolution of the DC current gain as a function of the current density. The TBBS makes sense when using the super-gain BJT （bipolar junction transistor） in reverse mode. It means that the reverse DC current gain has to be sufficient （at least higher than l compared with the conventional BJT one）. This new AC switch is bidirectional in current and voltage, totally controllable （turn-on and turn-off） and the most attractive solution in terms of on-state power losses. Further, its manufacturing process is as easier as existing device such as triac.
