Abstract
Dual Y shift 30° six-phase motors are expected to be extensively applied in high-power yet energy-effective fields, and a harmonic-suppressing control strategy plays a vital role in extending their prominent features of low losses and ultra-quiet operation. Aiming at the suppression of harmonic voltages, this paper proposes a six-phase space vector pulse width modulation method based on an optimization model, namely OM-SVPWM. First, four adjacent large vectors are employed in each of 12 sectors on a fundamental sub-plane. Second, the optimization model is constructed to intelligently determine activation durations of the four vectors, where its objective function aims to minimize the synthesis result on a harmonic sub-plane, and its constraint condition is that the synthesis result on the fundamental sub-plane satisfies a reference vector. Finally, to meet the real-time requirement, optimum solutions are obtained by using general central path following algorithm (GCPFA). Simulation and experiment results prove that, the OM-SVPWM performs around 37% better than a state-of-the-art competitive SVPWM in terms of harmonics suppression, which promise the proposed OM-SVPWM conforms to the energy-effective direction in actual engineering applications.
Highlights
With the explosive application of high-power equipment promoted by steady development of AC drive systems, applications of multiphase motor drive systems (MMDS) which are popular in high precision and extreme reliability occasions, have been growing dramatically in recent years [1,2,3]
We find that a general central path following algorithm (GCPFA) [21] can quickly find the exact optimal solution
There are many algorithms for solving the convex quadratic programming (CQP) problem, but through the joint debugging of software and of 16 hardware, we find that a general central path following algorithm (GCPFA) [21] can quickly8 find the exact optimal solution
Summary
With the explosive application of high-power equipment promoted by steady development of AC drive systems, applications of multiphase motor drive systems (MMDS) which are popular in high precision and extreme reliability occasions, have been growing dramatically in recent years [1,2,3]. In-depth study on driving techniques of MMDS has vital theoretical and practical significance for high-power industrial applications, ranging from electric and hybrid electric vehicles to electric ship propulsion, and from locomotive traction to “more-electric” aircraft. As prominentMMDS, MMDS, dual 30° six-phase has widespread gained widespread and representative application in high-power yet energy-effective fields, such as electric locomotive attention and representative application in high-power yet energy-effective fields, such as electric traction, ship electricship propulsion, power wind generation,. The stator of The a DYSM has locomotive traction, electric wind propulsion, poweretc. 1, the asymmetric six-phase windings of DYSM has an irregular but delicate structure. These advantages are highly beneficial to green power and operating of DYSMs under phase-deficient conditions is possible These advantages are highly sustainable beneficial toenergy-saving.
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