16,000-rpm Interior Permanent Magnet Reluctance Machine with Brushless Field Excitation

Hsu, J.S.; Burress, Timothy A.; Lee, S.T.; Wiles, Randy; Coomer, Chester; McKeever, J.W.; Adams, D.J.

doi:10.2172/921780

Cited by 6 publications

(7 citation statements)

References 4 publications

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“…This projected efficiency is substantially superior to the efficiency of a Toyota Prius motor which was a baseline motor for this project [4]. This higher efficiency is due to the reduced core loss by controlling air-gap flux through the BFE structure [3]. …”

Section: Resultsmentioning

confidence: 83%

“…Because a DC current controls the intensity of the axial-direction flux, the air-gap flux can decrease for the high-speed operation. The details are presented in [3][4][5][6]12].…”

Section: Brushless Field Excitationmentioning

confidence: 99%

“…To avoid the primary drawbacks of the IPMSM, a brushless field excitation (BFE) structure is introduced [3][4][5][6]. 1 The submitted manuscript has been authored by a contractor of the U. S. Government under contract no.…”

Section: Introductionmentioning

confidence: 99%

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Study of various slanted air-gap structures of interior permanent magnet synchronous motor with brushless field excitation

Lee

Tolbert

2010

2010 IEEE Energy Conversion Congress and Exposition

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1 Abstract --This paper shows how to maximize the effect of the slanted air-gap structure of an interior permanent magnet synchronous motor with brushless field excitation (BFE) for application in a hybrid electric vehicle. The BFE structure offers high torque density at low speed and weakened flux at high speed. The unique slanted air-gap is intended to increase the output torque of the machine as well as to maximize the ratio of the back-emf of a machine that is controllable by BFE.This irregularly shaped air-gap makes a flux barrier along the d-axis flux path and decreases the d-axis inductance; as a result, the reluctance torque of the machine is much higher than a uniform air-gap machine, and so is the output torque. Also, the machine achieves a higher ratio of the magnitude of controllable back-emf. The determination of the slanted shape was performed by using magnetic equivalent circuit analysis and finite element analysis (FEA).

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Section: Resultsmentioning

confidence: 83%

“…Because a DC current controls the intensity of the axial-direction flux, the air-gap flux can decrease for the high-speed operation. The details are presented in [3][4][5][6]12].…”

Section: Brushless Field Excitationmentioning

confidence: 99%

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Study of various slanted air-gap structures of interior permanent magnet synchronous motor with brushless field excitation

Lee

Tolbert

2010

2010 IEEE Energy Conversion Congress and Exposition

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“…10) and a flux barrier on the quadrature axis created using ferrite PMs. This combination will result in a high-saliency rotor with an Ld/Lq ratio in the region of 3-5 or more, which may lead to competitive torque density and efficiency [67]. This ratio is provided that the ferrite PMs do not demagnetize when there is a peak torque (high I q ) and the temperature is low [22].…”

Section: A Ferrite-pm-assisted and Field-wound-assisted Synchronous mentioning

confidence: 99%

“…In [67], a different variation is described. This machine has radial reluctance laminations and homopolar flux with an axial field winding.…”

Section: A Ferrite-pm-assisted and Field-wound-assisted Synchronous mentioning

confidence: 99%

Automotive Electric Propulsion Systems With Reduced or No Permanent Magnets: An Overview

Boldea

Tutelea

Parsa

et al. 2014

IEEE Trans. Ind. Electron.

683

245

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Hybrid and electric vehicle technology has seen rapid development in recent years. The motor and the generator are at the heart of the vehicle drive and energy system and often utilize expensive rare-earth permanent magnet (PM) material. This paper reviews and addresses the research work that has been carried out to reduce the amount of rare-earth material that is used while maintaining the high efficiency and performance that rare-earth PM machines offer. These new machines can use either less rare-earth PM material, weaker ferrite magnets, or no magnets; and they need to meet the high performance that the more usual interior PM synchronous motor with sintered neodymium-iron-boron magnets provides. These machines can take the form of PM-assisted synchronous reluctance machines, induction machines, switched reluctance machines, wound rotor synchronous machines (claw pole or biaxially excited), doublesaliency machines with ac or dc stator current control, or brushless dc multiple-phase reluctance machines.

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Analysis of Temperature Field and Water Cooling of Outer Rotor In-Wheel Motor for Electric Vehicle

et al. 2019

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In view of the narrow installation space of high power density and high torque in-wheel motor, the heat existed the in-wheel motor is balanced by cooling water channel to ensure the heat dissipation of the high power density in-wheel motor. In this paper, Ansoft Maxwell software is used to establish the twodimensional loss simulation model of in-wheel motor, and the winding loss, stator core loss, rotor core loss and permanent magnet eddy current loss of in-wheel motor are calculated respectively. The temperature field calculation model of in-wheel motor is established. The heat exchange coefficient of motor is calculated, and the equivalent treatment of windings is carried out. The spiral channel is selected to cool the motor. The CFD software is used to simulate and analyze the cooling fluid in the channel. The heat dissipation coefficient curve is calculated. Finally, the calculated results of in-wheel motor loss and heat dissipation coefficient curve are imported into the transient temperature field for simulation, and the temperature field distributions before cooling and after cooling are obtained. The results show that the temperature drop of winding is 32%, the temperature drop of stator core is 30%, the temperature drop of permanent magnet is 26%, and the temperature drop of rotor is 25%. The spiral channel structure adopted in this paper is reasonable and feasible, which provides a certain theoretical reference value for the research and development of in-wheel motor heat dissipation system.INDEX TERMS Electric vehicle, in-wheel motor, loss calculation, fluid field, water cooling.

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16,000-rpm Interior Permanent Magnet Reluctance Machine with Brushless Field Excitation

Cited by 6 publications

References 4 publications

Study of various slanted air-gap structures of interior permanent magnet synchronous motor with brushless field excitation

Study of various slanted air-gap structures of interior permanent magnet synchronous motor with brushless field excitation

Automotive Electric Propulsion Systems With Reduced or No Permanent Magnets: An Overview

Analysis of Temperature Field and Water Cooling of Outer Rotor In-Wheel Motor for Electric Vehicle

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