TY - GEN
T1 - Novel polyphase multipole square-wave permanent magnet motor drive for electric vehicles
AU - Chan, C. C.
AU - Jiang, J. Z.
AU - Chen, G. H.
AU - Wang, X. Y.
AU - Chau, K. T.
PY - 1993
Y1 - 1993
N2 - A novel high power density permanent magnet (PM) motor drive for electric vehicles (EVs) is proposed. The motor is a polyphase multipole square-wave PM motor, which can be classified as a kind of PM brushless dc motor. The distinct features of the proposed motor as compared with that of the conventional PM brushless dc motor lie in that: firstly, the multipole magnetic circuit arrangement enables the minimization of magnetic yoke, resulting in the reduction of motor volume and weight; secondly, the coil span is purposely designed to be equal to one slot pitch, thus saving in copper used; thirdly, by using fractional number of slots per pole per phase the arrangement of numbers of poles and slots is so unique that the magnetic force between stator and rotor at any rotating position is uniform, hence eliminating the cogging torque which usually occurs in PM motors; finally, the motor can be controlled to operate at constant torque region and constant power region with field weakening, thus both high starting torque and high cruising speed can be achieved. Therefore, as the proposed motor drive possesses distinct advantages of high power density, high efficiency and superior dynamic performance, it is very suitable for EV applications. A prototype of 5-phase 22-pole 5-kW motor drive has been designed for an experimental EV.
AB - A novel high power density permanent magnet (PM) motor drive for electric vehicles (EVs) is proposed. The motor is a polyphase multipole square-wave PM motor, which can be classified as a kind of PM brushless dc motor. The distinct features of the proposed motor as compared with that of the conventional PM brushless dc motor lie in that: firstly, the multipole magnetic circuit arrangement enables the minimization of magnetic yoke, resulting in the reduction of motor volume and weight; secondly, the coil span is purposely designed to be equal to one slot pitch, thus saving in copper used; thirdly, by using fractional number of slots per pole per phase the arrangement of numbers of poles and slots is so unique that the magnetic force between stator and rotor at any rotating position is uniform, hence eliminating the cogging torque which usually occurs in PM motors; finally, the motor can be controlled to operate at constant torque region and constant power region with field weakening, thus both high starting torque and high cruising speed can be achieved. Therefore, as the proposed motor drive possesses distinct advantages of high power density, high efficiency and superior dynamic performance, it is very suitable for EV applications. A prototype of 5-phase 22-pole 5-kW motor drive has been designed for an experimental EV.
UR - http://www.scopus.com/inward/record.url?scp=0027224142&partnerID=8YFLogxK
M3 - Conference article published in proceeding or book
AN - SCOPUS:0027224142
SN - 0780309839
T3 - Conference Procedings - IEEE Applied Power Electronics Conference and Exposition - APEC
SP - 315
EP - 321
BT - Conference Procedings - IEEE Applied Power Electronics Conference and Exposition - APEC
PB - Publ by IEEE
T2 - 8th Annual Applied Power Electronic Conference and Exposition - APEC '93
Y2 - 7 March 1993 through 11 March 1993
ER -