TY - GEN
T1 - A new direct torque control method for switched reluctance motor with high torque/ampere
AU - Sau, Shambhu
AU - Vandana, R.
AU - Fernandes, B. G.
PY - 2013
Y1 - 2013
N2 - Switched reluctance motor (SRM) has gained attention due to simple construction, ruggedness, high reliability, low cost, minimum maintenance and advancement in power electronics technology. However, SRM has some inherent disadvantages such as torque ripple, acoustic noise, requirement of rotor position information and control difficulties due to nonlinearities. It is reported in literature that smooth torque in SRM is achieved using the philosophy of direct torque control (DTC) of ac machines. In this paper, a comparative study of DTC with other torque control methods for 3-phase SRM is performed. It is observed that in case of DTC, high phase rms current is required to maintain constant flux linkage at all rotor positions of SRM thereby reducing the torque/ampere. It is also observed that in this scheme, different flux linkage references are required at different speeds to produce same torque for optimum torque/ampere. A new DTC scheme which addresses these limitations is proposed in this paper. In this scheme, the voltage vectors are selected judiciously to increase torque/ampere. The flux linkage is maintained constant only during phase commutation to avoid the need for rotor position information.
AB - Switched reluctance motor (SRM) has gained attention due to simple construction, ruggedness, high reliability, low cost, minimum maintenance and advancement in power electronics technology. However, SRM has some inherent disadvantages such as torque ripple, acoustic noise, requirement of rotor position information and control difficulties due to nonlinearities. It is reported in literature that smooth torque in SRM is achieved using the philosophy of direct torque control (DTC) of ac machines. In this paper, a comparative study of DTC with other torque control methods for 3-phase SRM is performed. It is observed that in case of DTC, high phase rms current is required to maintain constant flux linkage at all rotor positions of SRM thereby reducing the torque/ampere. It is also observed that in this scheme, different flux linkage references are required at different speeds to produce same torque for optimum torque/ampere. A new DTC scheme which addresses these limitations is proposed in this paper. In this scheme, the voltage vectors are selected judiciously to increase torque/ampere. The flux linkage is maintained constant only during phase commutation to avoid the need for rotor position information.
KW - Direct Instantaneous Torque Control
KW - Direct Torque Control
KW - Switched Reluctance Motor
UR - http://www.scopus.com/inward/record.url?scp=84893533459&partnerID=8YFLogxK
U2 - 10.1109/IECON.2013.6699527
DO - 10.1109/IECON.2013.6699527
M3 - Conference contribution
AN - SCOPUS:84893533459
SN - 9781479902248
T3 - IECON Proceedings (Industrial Electronics Conference)
SP - 2518
EP - 2523
BT - Proceedings, IECON 2013 - 39th Annual Conference of the IEEE Industrial Electronics Society
T2 - 39th Annual Conference of the IEEE Industrial Electronics Society, IECON 2013
Y2 - 10 November 2013 through 14 November 2013
ER -