TY - GEN
T1 - A study of rotor pole shape of in-wheel direct drive SR motor
AU - Ogasawara, Takayasu
AU - Goto, Hiroki
AU - Ichinokura, Osamu
PY - 2013/12/17
Y1 - 2013/12/17
N2 - A switched reluctance (SR) motor has an extremely simple and robust structure, and high heat capability because of no magnet. Therefore, these advantages are suitable for an application of the in-wheel direct drive SR motor to electric vehicles. Outer-rotor-type multipolar SR motors, however, have the invalid space where the inside of the stator core. The authors propose that a drive circuit is integrated into this space because of an effective use of interior space in the car. They developed the integrated type in-wheel SR motors and the electric vehicle which equipped with these SR motors underwent a driving trial. And yet it is necessary to accelerate more powerfully and expand the space to integrate the drive circuit. This paper presents an in-wheel SR motor improved torque density. The proposed SR motor, whose integrated space is broader and stator pole is longer than previously, has two features for improvement of torque density; the first one is asymmetrical rotor pole structure that torque is improved in only one rotational direction; the second one is the overlap of the excitation to increase effective voltage. In the proposed SR motor, the maximum torque volume ratio is about 38 N·m/L.
AB - A switched reluctance (SR) motor has an extremely simple and robust structure, and high heat capability because of no magnet. Therefore, these advantages are suitable for an application of the in-wheel direct drive SR motor to electric vehicles. Outer-rotor-type multipolar SR motors, however, have the invalid space where the inside of the stator core. The authors propose that a drive circuit is integrated into this space because of an effective use of interior space in the car. They developed the integrated type in-wheel SR motors and the electric vehicle which equipped with these SR motors underwent a driving trial. And yet it is necessary to accelerate more powerfully and expand the space to integrate the drive circuit. This paper presents an in-wheel SR motor improved torque density. The proposed SR motor, whose integrated space is broader and stator pole is longer than previously, has two features for improvement of torque density; the first one is asymmetrical rotor pole structure that torque is improved in only one rotational direction; the second one is the overlap of the excitation to increase effective voltage. In the proposed SR motor, the maximum torque volume ratio is about 38 N·m/L.
KW - Direct Drive
KW - Electric vehicle
KW - Simulation
KW - Switched reluctance motor/machine (SRM)
UR - http://www.scopus.com/inward/record.url?scp=84890220690&partnerID=8YFLogxK
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U2 - 10.1109/EPE.2013.6634397
DO - 10.1109/EPE.2013.6634397
M3 - Conference contribution
AN - SCOPUS:84890220690
SN - 9781479901166
T3 - 2013 15th European Conference on Power Electronics and Applications, EPE 2013
BT - 2013 15th European Conference on Power Electronics and Applications, EPE 2013
T2 - 2013 15th European Conference on Power Electronics and Applications, EPE 2013
Y2 - 2 September 2013 through 6 September 2013
ER -