RT Journal Article
T1 Simple carrier-based PWM for prolonged high dc-link utilization for symmetrical and asymmetrical n-phase AC Drives
A1 Gómez Yepes, Alejandro
A1 Doval Gandoy, Jesús
K1 33 Ciencias Tecnológicas
K1 3307 Tecnología Electrónica
AB Square voltage waveforms enable high dc-link utilization (DLU) in multiphase ac drives. Circulating-current filters were devised to attenuate the harmonics in no-torque low-impedance subspaces. Nonetheless, the square-wave harmonics that generate torque ripple are not reduced. Recently, it was proposed to combine circulating-current filters with a carrier-based pulsewidth modulation (PWM) method, which injects harmonics in no-torque subspaces (attenuated by the filter) of five-phase motors to achieve high DLU, without harmonics associated with torque ripple. The filter allows prolonged high-DLU operation without overheating. Compared with other PWM techniques capable of high-DLU operation (overmodulation), the one proposed for said filters is especially convenient because of its simplicity. However, it is unclear if this PWM method can be extended to machines of any phase number n and winding arrangement (symmetrical or asymmetrical); and if so, the resulting performance is also unknown. This article extends this simple carrier-based PWM strategy to n-phase drives, and evaluates its behavior in terms of DLU, distortion, and computational burden. Symmetrical and asymmetrical winding arrangements are considered. The improvement in DLU, compared with conventional PWM with zero-sequence injection, is considerable. Current distortion is negligible with a suitable filter. The simplicity over other high-DLU PWM techniques is remarkable. Experimental results are provided
PB IEEE Transactions on Power Electronics
SN 08858993
YR 2021
FD 2021-08
LK http://hdl.handle.net/11093/7233
UL http://hdl.handle.net/11093/7233
LA eng
NO IEEE Transactions on Power Electronics, 36(8): 8696-8712 (2021)
NO Agencia Estatal de Investigación | Ref. RYC2018-024407-I
DS Investigo
RD 17-sep-2024