EPE Association: EPE-PEMC 2008

EPE-PEMC 2008 - Plenary Session
You are here: EPE Documents > 04 - EPE-PEMC Conference Proceedings > EPE-PEMC 2008 - Conference > EPE-PEMC 2008 - Plenary Session

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   Current-Based Condition Monitoring of Electrical Machines in Safety Critical Applications
By Thomas G. Habetler [View]
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Abstract: The paper presents a complete summary of state-of-the-art techniques for current-based fault monitoring of low voltage permanent magnet synchronous machines commonly used in safety critical applications such as hybrid vehicles and backup generators. This includes detection of stator winding faults, and bearing faults. In addition, a fault tolerant strategy is presented which can be used to operate the machine in a fault tolerant mode even in the presence of the stator turn fault. Experimental results show the efficacy of these methods which allow for use for PM machines even in automotive applications wherein the machine cannot be stopped.

   Electric Drive System for Automatic Guided Vehicles Using Contact-Free Energy Transmission
By Marcel Jufer [View]
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Abstract: Four technologies, combining mainly innovative solutions, offer the possibility of clean and flexible vehicles, all using only electricity. The main common components are contact-free energy transmission, storage on super-capacitors, holonome axles integrating wheel-motors and automatic guiding. Moreover, the complete energetic chain is managed by power electronics. Their applications are mainly in the field of public and industrial transportation. Several applications are described: electric busses, automatic guided vehicles for container handling, automatic people movers and automatic surveillance vehicles. For more information please visit. http://www.numexia.com/

   State-of-the-Art High Power Density and High Efficiency DC-DC Chopper Circuits for HEV and FCEV Applications
By Atsuo Kawamura, Martin Pavlovsky and Yukinori Tsuruta [View]
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Abstract: Recent environmental issues have accelerated the use of more efficient and energy saving technologies in any area of our daily life. One of the major energy consumptions is in the transportation area, especially in the automobile field. DC/DC chopper circuits for use in hybrid electric vehicles (HEV), fuel cell electric vehicles (FCEV) and so on will be discussed in this paper from the view point of power density and efficiency. A typical power range of such converters can be in order of kWs up to over 100 kW with a short term overload requirement of often more than 200 %. Considering the state of the art, switching frequency of these converters is in the range from 50 kHz with IGBTs to 200 kHz with power MOSFETs, the power density peaks at about 25 kW/l, and the highest efficiency is close to 98 % depending on the load conditions. As can be seen from the brief introduction, the design of such converter presents multiple challenges from power density as well as efficiency point of view and these are discussed further in the paper.

   The Essence of Three-Phase AC/AC Converter Systems
By J. W. Kolar, T. Friedli, F. Krismer and S. D. Round [View]
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Abstract: In this paper the well-known voltage and current DC-link converter systems, used to implement an AC/AC converter, are initially presented. Using this knowledge and their space vector modulation methods we show their connection to the family of Indirect Matrix Converters and then finally the connection to direct Matrix Converters. A brief discussion of extended Matrix Converter circuits is given and a new unidirectional three-level Matrix Converter topology is proposed. This clearly shows the topological connections of the converter circuits that directly lead to an adaptability of the modulation methods. These allow the reader who is familiar with space vector modulation of voltage and current DC-link converters to simply incorporate and identify new modulation methods. A comparison of the converter concepts, with respect to their fundamental, topology-related characteristics, complexity, control and efficiency, then follows. Furthermore, by taking the example of a converter that covers a typical operation region in the torque-speed plane (incl. holding torque at standstill), the necessary silicon area of the power semiconductors is calculated for a maximum junction temperature. This paper concludes with proposals for subjects of further research in the area of Matrix Converters.

EPE-PEMC 2008 - Plenary Session
You are here: EPE Documents > 04 - EPE-PEMC Conference Proceedings > EPE-PEMC 2008 - Conference > EPE-PEMC 2008 - Plenary Session
	[return to parent folder]

	Current-Based Condition Monitoring of Electrical Machines in Safety Critical Applications By Thomas G. Habetler	[View] [Download]
Abstract: The paper presents a complete summary of state-of-the-art techniques for current-based fault monitoring of low voltage permanent magnet synchronous machines commonly used in safety critical applications such as hybrid vehicles and backup generators. This includes detection of stator winding faults, and bearing faults. In addition, a fault tolerant strategy is presented which can be used to operate the machine in a fault tolerant mode even in the presence of the stator turn fault. Experimental results show the efficacy of these methods which allow for use for PM machines even in automotive applications wherein the machine cannot be stopped.

	Electric Drive System for Automatic Guided Vehicles Using Contact-Free Energy Transmission By Marcel Jufer	[View] [Download]
Abstract: Four technologies, combining mainly innovative solutions, offer the possibility of clean and flexible vehicles, all using only electricity. The main common components are contact-free energy transmission, storage on super-capacitors, holonome axles integrating wheel-motors and automatic guiding. Moreover, the complete energetic chain is managed by power electronics. Their applications are mainly in the field of public and industrial transportation. Several applications are described: electric busses, automatic guided vehicles for container handling, automatic people movers and automatic surveillance vehicles. For more information please visit. http://www.numexia.com/

	State-of-the-Art High Power Density and High Efficiency DC-DC Chopper Circuits for HEV and FCEV Applications By Atsuo Kawamura, Martin Pavlovsky and Yukinori Tsuruta	[View] [Download]
Abstract: Recent environmental issues have accelerated the use of more efficient and energy saving technologies in any area of our daily life. One of the major energy consumptions is in the transportation area, especially in the automobile field. DC/DC chopper circuits for use in hybrid electric vehicles (HEV), fuel cell electric vehicles (FCEV) and so on will be discussed in this paper from the view point of power density and efficiency. A typical power range of such converters can be in order of kWs up to over 100 kW with a short term overload requirement of often more than 200 %. Considering the state of the art, switching frequency of these converters is in the range from 50 kHz with IGBTs to 200 kHz with power MOSFETs, the power density peaks at about 25 kW/l, and the highest efficiency is close to 98 % depending on the load conditions. As can be seen from the brief introduction, the design of such converter presents multiple challenges from power density as well as efficiency point of view and these are discussed further in the paper.

	The Essence of Three-Phase AC/AC Converter Systems By J. W. Kolar, T. Friedli, F. Krismer and S. D. Round	[View] [Download]
Abstract: In this paper the well-known voltage and current DC-link converter systems, used to implement an AC/AC converter, are initially presented. Using this knowledge and their space vector modulation methods we show their connection to the family of Indirect Matrix Converters and then finally the connection to direct Matrix Converters. A brief discussion of extended Matrix Converter circuits is given and a new unidirectional three-level Matrix Converter topology is proposed. This clearly shows the topological connections of the converter circuits that directly lead to an adaptability of the modulation methods. These allow the reader who is familiar with space vector modulation of voltage and current DC-link converters to simply incorporate and identify new modulation methods. A comparison of the converter concepts, with respect to their fundamental, topology-related characteristics, complexity, control and efficiency, then follows. Furthermore, by taking the example of a converter that covers a typical operation region in the torque-speed plane (incl. holding torque at standstill), the necessary silicon area of the power semiconductors is calculated for a maximum junction temperature. This paper concludes with proposals for subjects of further research in the area of Matrix Converters.