EPE Association: NORpie 2002 - Topic 02: MACHINES AND DRIVES FOR HYBRID ELECTRIC VEHICLES

NORpie 2002 - Topic 02: MACHINES AND DRIVES FOR HYBRID ELECTRIC VEHICLES
You are here: EPE Documents > 05 - EPE Supported Conference Proceedings > NORpie - Proceedings > NORpie 2002 > NORpie 2002 - Topic 02: MACHINES AND DRIVES FOR HYBRID ELECTRIC VEHICLES

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   Test Bench for Electromagnetic Energy Transducers in Hybrid Electric Vehicles
By S. Châtelet; P. Thelin; C. Sadarangani [View]
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Abstract: In this paper an experimental set-up is presented. It is intended for performance tests and efficiency measurements of prototypes of four quadrant energy transducers (4QT). The set-up consists of four electrical machines, each one of them supplied by a seperate inverter. The equipment and the solutions used are described.

   Electromagnetic Transducer for Hybrid Electric Vehicles
By F. Magnussen, C. Sadarangani [View]
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Abstract: This paper describes a novel electromagnetic transducer called the Four Quadrant Transducer (4QT) for hybrid electric vehicles. The system consists of one electrical machine unit (including two rotors) and two inverters, which enable the vehicle's Internal Combustion Engine (ICE) to run at its optimum working points regarding efficiency, almost independently of the changing load requirements at the wheels. In other words the ICE is operated at high torque and low speed as much as possible. As a consequence, reduced fuel consumption will be achieved. The basic structure of the Four Quadrant Transducer system, simulation results and ideas about suitable topologies for designing a compact machine unit are reported. The simulated system of a passenger car is equipped with a single step gearbox making it simple and cost effective. Since the engine is not mechanically connected to the wheels and the electrical components have lower power ratings than the engine itself, the system takes advantage of the best characteristics of the series- and the parallel hybrid, respectively. The proposed concept looks promising and fuel savings of more than 40% compared with a conventional vehicle can be achieved.

   Design Procedure for an AFPM Machine for Field-Weakening Applications
By M. Cirani; P. Thelin; C. Sadarangani [View]
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Abstract: Different Axial Flux PM machine topologies exist in literature, like, for example, references [1]-[4]. A special kind of AFPM machine, the Torus-machine, has proved to be suitable for high torque and low speed applications. An innovative design of the Toris-machine has been proposed in order to make the Torus-machine suitable for traction applications by means of field-weakening. The aim of this paper is to analyze, in general terms, the basic equations that describe the operating conditions of such machines.

   Modelling of Iron Losses in Permanent Magnet Motors with Field-Weakening Capability
By J. Soulard; S. Meier; Y-K. Chin [View]
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Abstract: Finite element analysis is usually used to calculate iron losses in permanent magnet motors under field-weakening operation. Analytical models for the iron losses taking into account the rate of change of the flux densities and stator leakages are presented and compared to FEM results for surface-mounted permanent magnet motors.

   Integrated Free-Piston Generators: An Overview
By W. Arshad; P. Thelin; C. Sadarangani; T. Bäckström [View]
[Download]

Abstract: The free-piston generator is an energy conversion device that integrates a combustion engine and an electrical generator into a single unit. Thereby the intermediary crankshaft stage present in conventional hybrid topologies is eliminated. This has benefits in efficiency, weight reduction, robustness, variable compression operation and multi-fuel possibilities. This paper presents the free-piston generator concepts, along with the expected benefits and drawbacks. A literature survey is provided. Results from a simplified combustion modeling process are presented in terms of piston motion profiles. These have implications upon the dimensioning and selection of an appropriate electrical machine. Specifications for the electrical machine are outlined. Some distinct electrical machine solutions are presented and discussed. An application of the free-piston generator in a series hybrid vehicle is also proposed.

NORpie 2002 - Topic 02: MACHINES AND DRIVES FOR HYBRID ELECTRIC VEHICLES
You are here: EPE Documents > 05 - EPE Supported Conference Proceedings > NORpie - Proceedings > NORpie 2002 > NORpie 2002 - Topic 02: MACHINES AND DRIVES FOR HYBRID ELECTRIC VEHICLES
	[return to parent folder]

	Test Bench for Electromagnetic Energy Transducers in Hybrid Electric Vehicles By S. Châtelet; P. Thelin; C. Sadarangani	[View] [Download]
Abstract: In this paper an experimental set-up is presented. It is intended for performance tests and efficiency measurements of prototypes of four quadrant energy transducers (4QT). The set-up consists of four electrical machines, each one of them supplied by a seperate inverter. The equipment and the solutions used are described.

	Electromagnetic Transducer for Hybrid Electric Vehicles By F. Magnussen, C. Sadarangani	[View] [Download]
Abstract: This paper describes a novel electromagnetic transducer called the Four Quadrant Transducer (4QT) for hybrid electric vehicles. The system consists of one electrical machine unit (including two rotors) and two inverters, which enable the vehicle's Internal Combustion Engine (ICE) to run at its optimum working points regarding efficiency, almost independently of the changing load requirements at the wheels. In other words the ICE is operated at high torque and low speed as much as possible. As a consequence, reduced fuel consumption will be achieved. The basic structure of the Four Quadrant Transducer system, simulation results and ideas about suitable topologies for designing a compact machine unit are reported. The simulated system of a passenger car is equipped with a single step gearbox making it simple and cost effective. Since the engine is not mechanically connected to the wheels and the electrical components have lower power ratings than the engine itself, the system takes advantage of the best characteristics of the series- and the parallel hybrid, respectively. The proposed concept looks promising and fuel savings of more than 40% compared with a conventional vehicle can be achieved.

	Design Procedure for an AFPM Machine for Field-Weakening Applications By M. Cirani; P. Thelin; C. Sadarangani	[View] [Download]
Abstract: Different Axial Flux PM machine topologies exist in literature, like, for example, references [1]-[4]. A special kind of AFPM machine, the Torus-machine, has proved to be suitable for high torque and low speed applications. An innovative design of the Toris-machine has been proposed in order to make the Torus-machine suitable for traction applications by means of field-weakening. The aim of this paper is to analyze, in general terms, the basic equations that describe the operating conditions of such machines.

	Modelling of Iron Losses in Permanent Magnet Motors with Field-Weakening Capability By J. Soulard; S. Meier; Y-K. Chin	[View] [Download]
Abstract: Finite element analysis is usually used to calculate iron losses in permanent magnet motors under field-weakening operation. Analytical models for the iron losses taking into account the rate of change of the flux densities and stator leakages are presented and compared to FEM results for surface-mounted permanent magnet motors.

	Integrated Free-Piston Generators: An Overview By W. Arshad; P. Thelin; C. Sadarangani; T. Bäckström	[View] [Download]
Abstract: The free-piston generator is an energy conversion device that integrates a combustion engine and an electrical generator into a single unit. Thereby the intermediary crankshaft stage present in conventional hybrid topologies is eliminated. This has benefits in efficiency, weight reduction, robustness, variable compression operation and multi-fuel possibilities. This paper presents the free-piston generator concepts, along with the expected benefits and drawbacks. A literature survey is provided. Results from a simplified combustion modeling process are presented in terms of piston motion profiles. These have implications upon the dimensioning and selection of an appropriate electrical machine. Specifications for the electrical machine are outlined. Some distinct electrical machine solutions are presented and discussed. An application of the free-piston generator in a series hybrid vehicle is also proposed.