EPE Association: EPE 2011 - LS8e: Topic 10: High Efficiency Motor Design

EPE 2011 - LS8e: Topic 10: High Efficiency Motor Design
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2011 ECCE Europe - Conference > EPE 2011 - Topic 10: Electrical Machines > EPE 2011 - LS8e: Topic 10: High Efficiency Motor Design

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   A New Structure of 12Slot-10Pole Field-Excitation Flux Switching Synchronous Machine for Hybrid Electric Vehicles
By Erwan SULAIMAN, Takashi KOSAKA, Nobuyuki MATSUI [View]
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Abstract: This paper presents a new structure of 12Slot-10Pole field-excitation flux switching synchronous machine (FEFSSM) with all active parts namely field excitation coil (FEC) and armature coil are located on the stator, applied for hybrid electric vehicles (HEVs). The rotor part consists of single piece iron makes it more robust and becoming more suitable to apply for high speed motor drive system application coupled with reduction gear. The design target is the motor with a maximum torque of 210Nm with reduction gear ratio of 4:1, a maximum power of 123kW, a maximum power density more than 3.5kW/kg, and a maximum speed of 20,000r/min with similar restrictions and specifications in IPMSM used for LEXUS RX400h. The deterministic design optimization approach is used to treat design parameters defined in rotor, armature and FEC repeatedly until the target performances are achieved, under maximum current density 21A/mm2 for both armature and FEC. A result shows that the proposed design enables to keep the same power density in existing IPMSM installed on a commercial SUV-HEV.

   First Experimental Results of Highly Efficient PMSM for HEV
By Lorenz TAUS-BETI, Uwe SCHAEFER [View]
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Abstract: This report constitutes the third release of a project concerning the minimization of losses of a Permanent Magnet Synchronous Machine (PMSM) for an Hybrid Electric Vehicle (HEV) and introduces the first experimental results carried out on a prototype. The focus of the research is centred on the reduction of idle loss at high speed and low load via an asymmetrical rotor design with an inductance ratio Ld/Lq>1. Such a characteristic feature decreases the amount of current required in the flux weakening operation and makes the engine particularly suitable for loss-minimization control strategies. An appropriate test bench as well as the necessary components to control and feed the PMSM have been set up in order to test the prototype on-load operation. The characteristic diagram of the quadrature inductance Lq and the direct inductance Ld are presented and validate the design criteria for Ld/Lq>1. The current trajectories of Maximum Torque per Ampere (MTPA), Maximum Torque per Volt (MTPV) and Maximum Torque per Watt (MTPW) have been determined experimentally at several speeds.

   Novel bearingless slice motor design with four concentrated coils featuring a unique operational behavior
By Wolfgang GRUBER, Wolfgang BRIEWASSER, Wolfgang AMRHEIN [View]
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Abstract: This work describes a novel bearingless slice motor concept. Being the first bearingless slice motor without permanent magnets in the rotor but in the stator, this magnetically suspended drive system is most suitable for disposable devices in the biomedical, chemical or food industry. Due to the fact that the rotor holds no permanent magnets, it is easy to manufacture and very robust. Additionally, highly acid and high temperature rotor environments can be tolerated without complicated rotor housings.However, it turned out that this drive concept features a new operational behavior distinguishing it from all other all state of the art bearingless drives. The considered motor features a biased force orbit, concluding in a superior torque performance when using very economic bearingless slice motors with only four stator coils. After a concept study it was decided to put the theoretical and finite element results to the test. A prototype motor was optimized using a multi-objective evolutionary algorithm, designed manufactured and put into operation. First measurements verify the finite element simulations and the theoretical considerations.

EPE 2011 - LS8e: Topic 10: High Efficiency Motor Design
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2011 ECCE Europe - Conference > EPE 2011 - Topic 10: Electrical Machines > EPE 2011 - LS8e: Topic 10: High Efficiency Motor Design
	[return to parent folder]

	A New Structure of 12Slot-10Pole Field-Excitation Flux Switching Synchronous Machine for Hybrid Electric Vehicles By Erwan SULAIMAN, Takashi KOSAKA, Nobuyuki MATSUI	[View] [Download]
Abstract: This paper presents a new structure of 12Slot-10Pole field-excitation flux switching synchronous machine (FEFSSM) with all active parts namely field excitation coil (FEC) and armature coil are located on the stator, applied for hybrid electric vehicles (HEVs). The rotor part consists of single piece iron makes it more robust and becoming more suitable to apply for high speed motor drive system application coupled with reduction gear. The design target is the motor with a maximum torque of 210Nm with reduction gear ratio of 4:1, a maximum power of 123kW, a maximum power density more than 3.5kW/kg, and a maximum speed of 20,000r/min with similar restrictions and specifications in IPMSM used for LEXUS RX400h. The deterministic design optimization approach is used to treat design parameters defined in rotor, armature and FEC repeatedly until the target performances are achieved, under maximum current density 21A/mm2 for both armature and FEC. A result shows that the proposed design enables to keep the same power density in existing IPMSM installed on a commercial SUV-HEV.

	First Experimental Results of Highly Efficient PMSM for HEV By Lorenz TAUS-BETI, Uwe SCHAEFER	[View] [Download]
Abstract: This report constitutes the third release of a project concerning the minimization of losses of a Permanent Magnet Synchronous Machine (PMSM) for an Hybrid Electric Vehicle (HEV) and introduces the first experimental results carried out on a prototype. The focus of the research is centred on the reduction of idle loss at high speed and low load via an asymmetrical rotor design with an inductance ratio Ld/Lq>1. Such a characteristic feature decreases the amount of current required in the flux weakening operation and makes the engine particularly suitable for loss-minimization control strategies. An appropriate test bench as well as the necessary components to control and feed the PMSM have been set up in order to test the prototype on-load operation. The characteristic diagram of the quadrature inductance Lq and the direct inductance Ld are presented and validate the design criteria for Ld/Lq>1. The current trajectories of Maximum Torque per Ampere (MTPA), Maximum Torque per Volt (MTPV) and Maximum Torque per Watt (MTPW) have been determined experimentally at several speeds.

	Novel bearingless slice motor design with four concentrated coils featuring a unique operational behavior By Wolfgang GRUBER, Wolfgang BRIEWASSER, Wolfgang AMRHEIN	[View] [Download]
Abstract: This work describes a novel bearingless slice motor concept. Being the first bearingless slice motor without permanent magnets in the rotor but in the stator, this magnetically suspended drive system is most suitable for disposable devices in the biomedical, chemical or food industry. Due to the fact that the rotor holds no permanent magnets, it is easy to manufacture and very robust. Additionally, highly acid and high temperature rotor environments can be tolerated without complicated rotor housings.However, it turned out that this drive concept features a new operational behavior distinguishing it from all other all state of the art bearingless drives. The considered motor features a biased force orbit, concluding in a superior torque performance when using very economic bearingless slice motors with only four stator coils. After a concept study it was decided to put the theoretical and finite element results to the test. A prototype motor was optimized using a multi-objective evolutionary algorithm, designed manufactured and put into operation. First measurements verify the finite element simulations and the theoretical considerations.