TY - JOUR
T1 - Novel Variable Reluctance N-speed Synchro andY its Application for Synchronous Reluctance Motor Drive.
AU - Shimomura, Shoji
AU - Ishizaki, Akira
AU - Saito, Kazutaka
PY - 1996/9/1
Y1 - 1996/9/1
N2 - The authors have previously presented a control scheme for synchronous reluctance motors where the motor current is controlled to keep the MMF phase angle constant, and made it clear that a simpler control scheme is possible by using a N-speed synchro for a 2N pole motor. However, conventional brushless synchros are expensive and bulky due to the intricate construction where the rotary transformer supplies current to the exciting winding on the rotor core. The authors have therefore developed a novel VR (variable reluctance) synchro without a rotary transformer, consisting of a stator core with both the exciting and output windings and a uniquely shaped rotor core with no winding. This paper describes the theory of the novel VR synchro and presents measured waveforms of the output voltages of a prototype VR 4-speed synchro. In addition, a variable speed drive system for 8-pole reluctance motors which uses the new control scheme is introduced. In this system, the VR synchro is directly connected to the motor shaft, whose output voltages are demodulated and directly used as the current phase command for the inverter current supplied to the motor. Experimental results show a satisfactory speed response for 4 quadrant drive.
AB - The authors have previously presented a control scheme for synchronous reluctance motors where the motor current is controlled to keep the MMF phase angle constant, and made it clear that a simpler control scheme is possible by using a N-speed synchro for a 2N pole motor. However, conventional brushless synchros are expensive and bulky due to the intricate construction where the rotary transformer supplies current to the exciting winding on the rotor core. The authors have therefore developed a novel VR (variable reluctance) synchro without a rotary transformer, consisting of a stator core with both the exciting and output windings and a uniquely shaped rotor core with no winding. This paper describes the theory of the novel VR synchro and presents measured waveforms of the output voltages of a prototype VR 4-speed synchro. In addition, a variable speed drive system for 8-pole reluctance motors which uses the new control scheme is introduced. In this system, the VR synchro is directly connected to the motor shaft, whose output voltages are demodulated and directly used as the current phase command for the inverter current supplied to the motor. Experimental results show a satisfactory speed response for 4 quadrant drive.
UR - http://www.scopus.com/inward/record.url?scp=85024746325&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85024746325&partnerID=8YFLogxK
U2 - 10.1541/ieejias.116.1159
DO - 10.1541/ieejias.116.1159
M3 - Article
AN - SCOPUS:85024746325
VL - 116
SP - 1159
EP - 1166
JO - IEEJ Transactions on Industry Applications
JF - IEEJ Transactions on Industry Applications
SN - 0913-6339
IS - 11
ER -