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- Title
Power factor improvement of permanent-magnet linear vernier motor by using dual-inverter with hybrid discontinuous PWM.
- Authors
Dezhi Xu; Wenxiang Zhao; Yu Cheng; Qian Chen; Liang Xu
- Abstract
A permanent-magnet linear vernier (PMLV) motor has the advantages of large force and low cost, but it suffers from a low-power factor. This study proposes an instantaneous power control algorithm by using a dual-inverter open-winding (OW) configuration to equivalently improve the PMLV motor power factor. In the proposed algorithm, the active and reactive powers for the motor operation are supplied by the main and compensation inverters, respectively. Therefore, the main inverter dc-link voltage is fully utilised to generate the active power, which is equivalent to the improvement of the motor power factor. Furthermore, a hybrid discontinuous pulse width modulation (HDPWM) scheme is proposed, which takes into consideration the power factor characteristics of the dual-inverter. Compared to the existing OW modulation ones, the proposed HDPWM technique can greatly reduce the dual-inverter loss. The experimental results are carried out to verify the proposed control strategy.
- Subjects
PULSE width modulation; VERNIERS; REACTIVE power; PULSE width modulation inverters; MOTORS; PERMANENT magnets
- Publication
IET Power Electronics (Wiley-Blackwell), 2019, Vol 12, Issue 13, p3438
- ISSN
1755-4535
- Publication type
Article
- DOI
10.1049/iet-pel.2019.0217