EPE Association: NORpie 2004 - Topic 08: Automotive Applications

NORpie 2004 - Topic 08: Automotive Applications
You are here: EPE Documents > 05 - EPE Supported Conference Proceedings > NORpie - Proceedings > NORpie 2004 > NORpie 2004 - Topic 08: Automotive Applications

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   Electromagnetic Compatibility Problems in Automotive Applications
By S. Marksell; M. Alaküla [View]
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Abstract: This paper discuss electromagnetic compatibility problems in automotive applications where the voltage is controlled by pulse width modulation. Some proposed solutions are presented, and also the results are shown. In order to get a good measure of the efficiency of the different solutions, the radiated emissions from a system composed of a power electronic part with a DC/DC converter and a load are measured. The solutions that are tested are affecting both the hardware and the software of the setup. Also experiments where different solutions are combined are investigated.

   Alternative Energy Storage System for Hybrid Electric Vehicles
By T. Anderssona; J. Grootab; H. Bergb; J. Lindströmb; T. Thiringera [View]
[Download]

Abstract: In this paper an alternative energy storage system in the drive train of a hybrid electric vehicle is investigated. In particular, it concentrates on the potential reduction of the stresses of the battery when electrochemical capacitors, a.k.a supercapacitors, are added as a high power energy storage. Different control strategies are evaluated and an estimation of the performance is given. In order to verify the simulation results, a downscaled HEV drive train consisting of NiMH batteries, electrochemical capacitors, a DC/DC converter and an external load, is built and tested. The results show a significantly reduction in battery stresses and a good agreement between the models used in simulations and the laboratory system. Finally, a weight optimisation of such a system is briefly discussed.

   Testing of Silver-, Copper- and Electro-Graphite Brush Materials for Slip Ring Units
By E. Nordlund; F. Magnussen; G. Bassilious; P. Thelin [View]
[Download]

Abstract: In a novel hybrid propulsion system, the Four Quadrant Transducer (4QT), a slip ring unit is required to transfer alternating current to a rotating three-phase winding. This is an automotive application with high demands on cost effectiveness and reliability and the slip ring unit is one of the potentially weak links in the system that has to be investigated carefully. This paper investigates the impact on the performance of a slip ring unit equipped with different brush materials. The investigation focuses on the losses and the temperature rises in the slip ring unit.

   Comparison of Two Algorithms for Energy Management of Hybrid Powertrains
By K. Jonasson; J. Hellgren [View]
[Download]

Abstract: The overall aim with this paper is to compare two control algorithms used for energy management of Hybrid Electric Vehicles (HEVs). The primary task of the Energy Management (EM) algorithm is to distribute the power demand between the Primary Power Unit (PPU) and the buffer. The EM algorithm influences the obtained fuel consumption, component wear and emissions. The realization of EM can vary strongly. This paper presents two possible approaches where one algorithm uses Fuzzy Logic (FL) and another is based on an analytic formula. The conclusion is that the algorithm based on FL is more complex and thereby more difficult to adapt to a specific powertrain and transport task. The advantage with the FL algorithm, compared to the algorithm based on an analytic formula is that it is more flexible, i.e. it makes very few assumptions about the powertrain characteristics.

NORpie 2004 - Topic 08: Automotive Applications
You are here: EPE Documents > 05 - EPE Supported Conference Proceedings > NORpie - Proceedings > NORpie 2004 > NORpie 2004 - Topic 08: Automotive Applications
	[return to parent folder]

	Electromagnetic Compatibility Problems in Automotive Applications By S. Marksell; M. Alaküla	[View] [Download]
Abstract: This paper discuss electromagnetic compatibility problems in automotive applications where the voltage is controlled by pulse width modulation. Some proposed solutions are presented, and also the results are shown. In order to get a good measure of the efficiency of the different solutions, the radiated emissions from a system composed of a power electronic part with a DC/DC converter and a load are measured. The solutions that are tested are affecting both the hardware and the software of the setup. Also experiments where different solutions are combined are investigated.

	Alternative Energy Storage System for Hybrid Electric Vehicles By T. Anderssona; J. Grootab; H. Bergb; J. Lindströmb; T. Thiringera	[View] [Download]
Abstract: In this paper an alternative energy storage system in the drive train of a hybrid electric vehicle is investigated. In particular, it concentrates on the potential reduction of the stresses of the battery when electrochemical capacitors, a.k.a supercapacitors, are added as a high power energy storage. Different control strategies are evaluated and an estimation of the performance is given. In order to verify the simulation results, a downscaled HEV drive train consisting of NiMH batteries, electrochemical capacitors, a DC/DC converter and an external load, is built and tested. The results show a significantly reduction in battery stresses and a good agreement between the models used in simulations and the laboratory system. Finally, a weight optimisation of such a system is briefly discussed.

	Testing of Silver-, Copper- and Electro-Graphite Brush Materials for Slip Ring Units By E. Nordlund; F. Magnussen; G. Bassilious; P. Thelin	[View] [Download]
Abstract: In a novel hybrid propulsion system, the Four Quadrant Transducer (4QT), a slip ring unit is required to transfer alternating current to a rotating three-phase winding. This is an automotive application with high demands on cost effectiveness and reliability and the slip ring unit is one of the potentially weak links in the system that has to be investigated carefully. This paper investigates the impact on the performance of a slip ring unit equipped with different brush materials. The investigation focuses on the losses and the temperature rises in the slip ring unit.

	Comparison of Two Algorithms for Energy Management of Hybrid Powertrains By K. Jonasson; J. Hellgren	[View] [Download]
Abstract: The overall aim with this paper is to compare two control algorithms used for energy management of Hybrid Electric Vehicles (HEVs). The primary task of the Energy Management (EM) algorithm is to distribute the power demand between the Primary Power Unit (PPU) and the buffer. The EM algorithm influences the obtained fuel consumption, component wear and emissions. The realization of EM can vary strongly. This paper presents two possible approaches where one algorithm uses Fuzzy Logic (FL) and another is based on an analytic formula. The conclusion is that the algorithm based on FL is more complex and thereby more difficult to adapt to a specific powertrain and transport task. The advantage with the FL algorithm, compared to the algorithm based on an analytic formula is that it is more flexible, i.e. it makes very few assumptions about the powertrain characteristics.