TY - GEN
T1 - Super high speed PM motor drive system by a quasi-current source inverter
AU - Takahashi, Isao
AU - Koganezawa, Takehisa
AU - Su, Guijia
AU - Oyama, Kazunobu
PY - 1993
Y1 - 1993
N2 - This paper describes a surface mounted PM motor with the ratings of 5 kW and 180,000 rpm for super high speed drive applications such as machine tool. A much larger air gap, compared with that of the existing PM motors, is utilized to reduce the slot ripples and hence the resultant eddy current loss in the metallic sleeve that retains the permanent magnets, otherwise this loss would be objectionable at such high speeds. The motor is supplied from a quasi-current source inverter with the dc current controlled by a chopper and operated at a near unit power factor by the use of a simple position sensorless control, to improve the motor efficiency. The analytic results are presented to show the slot ripple reducing effect of increasing the air gap length. To investigate the losses of the sleeve, several motors with different sleeve were manufactured and tested. Typical experimental results on these prototypes are given, which show that motor efficiency of higher than 90% can be realized at the rated torque over a wide speed range.
AB - This paper describes a surface mounted PM motor with the ratings of 5 kW and 180,000 rpm for super high speed drive applications such as machine tool. A much larger air gap, compared with that of the existing PM motors, is utilized to reduce the slot ripples and hence the resultant eddy current loss in the metallic sleeve that retains the permanent magnets, otherwise this loss would be objectionable at such high speeds. The motor is supplied from a quasi-current source inverter with the dc current controlled by a chopper and operated at a near unit power factor by the use of a simple position sensorless control, to improve the motor efficiency. The analytic results are presented to show the slot ripple reducing effect of increasing the air gap length. To investigate the losses of the sleeve, several motors with different sleeve were manufactured and tested. Typical experimental results on these prototypes are given, which show that motor efficiency of higher than 90% can be realized at the rated torque over a wide speed range.
UR - http://www.scopus.com/inward/record.url?scp=0027804394&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:0027804394
SN - 078031462X
T3 - Conference Record - IAS Annual Meeting (IEEE Industry Applications Society)
SP - 657
EP - 662
BT - Conference Record - IAS Annual Meeting (IEEE Industry Applications Society)
A2 - Anon, null
PB - Publ by IEEE
T2 - Proceedings of the 28th Annual Meeting of the IEEE Industry Applications Conference
Y2 - 3 October 1993 through 8 October 1993
ER -