EPE Association: EPE 2011 - LS3f: Topic 17: Contactless Power Supply

EPE 2011 - LS3f: Topic 17: Contactless Power Supply
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2009 - Conference > EPE 2009 - Topic 17: 'Electrical Systems in Aerospace, Space, Surface and Marine Transport' > EPE 2011 - LS3f: Topic 17: Contactless Power Supply

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   Contactless Charging for Electric Vehicles with a Large Air Gap
By Terry Chi Young HO, Ben GOMERSALL, Li RAN [View]
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Abstract: An induction coupler with 100mm wide air gap is being developed for contactless charging of electric vehicles with power levels up to 3kW. This will enable convenient opportunity charging at stops and maximise battery life and mileage. A core was found to be necessary, and using an iterative method, the core design was optimised for optimum coupling was found for the 100mm air gap. High frequency operation is necessary to reduce the size of compensating capacitors and the thickness and weight of the core, but is limited by the eddy current and the switching losses. An experiment was carried out to compare measurement and software modelling results. A charging characteristic was found by simulation and a frequency control strategy is proposed.

   Efficiency Improvement of Contactless Energy Transfer Systems Using Series Compensation Device Named MERS
By Takanori ISOBE, Kazuto KOBAYASHI, Kazuyuki WAKASUGI, Ryuichi SHIMADA [View]
[Download]

Abstract: Electromagnetic coupled contactless energy transfer system has a challenge that the output power and efficiency is closely affected by the relative position between primary and secondary coils. For the challenge, this paper proposes an active series compensation device named MERS applied for that type of contactless energy transfer system. This paper proposes that 2-switch configuration of MERS is attractive for this application from points of operating range required and loss characteritics of the configuration. Small scale experiments with 1-kW demonstration device were conducted and confirm that the active compensation can achieve the optimal operation point for varying relative position of coils.

   Low Power Rectenna Topologies for Medium Range Wireless Energy Transfer
By Vlad MARIAN, Christian VOLLAIRE, Jacques VERDIER, Bruno ALLARD [View]
[Download]

Abstract: This paper presents and compares different rectifying antenna (rectenna) circuit topologies optimized for sub-mW incident microwave power levels. Excellent performance is achieved in terms of output voltage level and RF to DC conversion efficiency. Several prototypes have been fabricated using small localized components and tested. A detailed study of the behavior of a low power rectenna as a voltage source is presented. The influence of the antenna characteristic impedance on circuit performance is also studied.

EPE 2011 - LS3f: Topic 17: Contactless Power Supply
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2009 - Conference > EPE 2009 - Topic 17: 'Electrical Systems in Aerospace, Space, Surface and Marine Transport' > EPE 2011 - LS3f: Topic 17: Contactless Power Supply
	[return to parent folder]

	Contactless Charging for Electric Vehicles with a Large Air Gap By Terry Chi Young HO, Ben GOMERSALL, Li RAN	[View] [Download]
Abstract: An induction coupler with 100mm wide air gap is being developed for contactless charging of electric vehicles with power levels up to 3kW. This will enable convenient opportunity charging at stops and maximise battery life and mileage. A core was found to be necessary, and using an iterative method, the core design was optimised for optimum coupling was found for the 100mm air gap. High frequency operation is necessary to reduce the size of compensating capacitors and the thickness and weight of the core, but is limited by the eddy current and the switching losses. An experiment was carried out to compare measurement and software modelling results. A charging characteristic was found by simulation and a frequency control strategy is proposed.

	Efficiency Improvement of Contactless Energy Transfer Systems Using Series Compensation Device Named MERS By Takanori ISOBE, Kazuto KOBAYASHI, Kazuyuki WAKASUGI, Ryuichi SHIMADA	[View] [Download]
Abstract: Electromagnetic coupled contactless energy transfer system has a challenge that the output power and efficiency is closely affected by the relative position between primary and secondary coils. For the challenge, this paper proposes an active series compensation device named MERS applied for that type of contactless energy transfer system. This paper proposes that 2-switch configuration of MERS is attractive for this application from points of operating range required and loss characteritics of the configuration. Small scale experiments with 1-kW demonstration device were conducted and confirm that the active compensation can achieve the optimal operation point for varying relative position of coils.

	Low Power Rectenna Topologies for Medium Range Wireless Energy Transfer By Vlad MARIAN, Christian VOLLAIRE, Jacques VERDIER, Bruno ALLARD	[View] [Download]
Abstract: This paper presents and compares different rectifying antenna (rectenna) circuit topologies optimized for sub-mW incident microwave power levels. Excellent performance is achieved in terms of output voltage level and RF to DC conversion efficiency. Several prototypes have been fabricated using small localized components and tested. A detailed study of the behavior of a low power rectenna as a voltage source is presented. The influence of the antenna characteristic impedance on circuit performance is also studied.