TY - JOUR
T1 - Phase current reconstruction of switched reluctance motors from DC-link current under double high frequency pulses injection
AU - Gan, Chun
AU - Wu, Jianhua
AU - Yang, Shiyou
AU - Hu, Yihua
N1 -
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PY - 2014
Y1 - 2014
N2 - witched reluctance motors (SRMs) have been considered as low-cost machines for electric vehicle (EV) and hybrid electric vehicle (HEV) applications. However, the current sensors used in the system will not only increase the cost and volume, but also degrade the running reliability of the motor drives. Conventionally, the current sensors are used in each phase winding individually to obtain these phase currents. To reduce the number of current sensors, a four-phase 8/6-pole SRM is applied to analyze the working states and a novel phase current reconstruction method from the dc-link current employing double high frequency pulses injection is then proposed. Two kinds of high frequency pulses with large duty-cycles and phase-shift are injected to the down-switches in each phase respectively when the phase currents are overlapped in the turn-on region, and the dc-link current is decomposed to reconstruct phase currents in both current chopping control (CCC) system and single pulse control (SPC) system. The transient performance in a closed-loop system based on the phase current reconstruction scheme is investigated. The proposed method uses only one current sensor in the dc-link and requires no additional circuits. The simulation and experimental results are presented to confirm the implementation of the proposed method.
AB - witched reluctance motors (SRMs) have been considered as low-cost machines for electric vehicle (EV) and hybrid electric vehicle (HEV) applications. However, the current sensors used in the system will not only increase the cost and volume, but also degrade the running reliability of the motor drives. Conventionally, the current sensors are used in each phase winding individually to obtain these phase currents. To reduce the number of current sensors, a four-phase 8/6-pole SRM is applied to analyze the working states and a novel phase current reconstruction method from the dc-link current employing double high frequency pulses injection is then proposed. Two kinds of high frequency pulses with large duty-cycles and phase-shift are injected to the down-switches in each phase respectively when the phase currents are overlapped in the turn-on region, and the dc-link current is decomposed to reconstruct phase currents in both current chopping control (CCC) system and single pulse control (SPC) system. The transient performance in a closed-loop system based on the phase current reconstruction scheme is investigated. The proposed method uses only one current sensor in the dc-link and requires no additional circuits. The simulation and experimental results are presented to confirm the implementation of the proposed method.
KW - switched reluctance motor
KW - electric vehicle
KW - phase current reconstruction
KW - high frequency pulses injection
U2 - 10.1109/TIE.2014.2364153
DO - 10.1109/TIE.2014.2364153
M3 - Article
JO - IEEE Transactions on Industrial Electronics
JF - IEEE Transactions on Industrial Electronics
SN - 0278-0046
ER -