Analysis of multiphase space vector pulse-width modulation based on multiple d-q spaces concept

• Published in: IEEE transactions on power electronics Vol. 20; no. 6; pp. 1364 - 1371
• Main Authors: Hyung-Min Ryu, Jang-Hwan Kim, Sul, Seung-Ki
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.11.2005; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Air gaps; Applied sciences; Electric potential; Electrical engineering; Electrical engineering. Electrical power engineering; Electrical equipment; Electrical machines; Exact sciences and technology; Functional analysis; Inverters; Mathematical analysis; Modulation; Motors; Multiphase; Multiphase motors; multiphase space vector pulse-width modulation (SVPWM); multiple; nonsinusoidal voltage; Permanent magnet motors; Power electronics, power supplies; Pulse modulation; Pulse width modulation inverters; Space stations; Space vector pulse width modulation; Synchronous motors; Torque; Vectors (mathematics); Voltage; Zero voltage switching; Waveform; multiple d-q spaces concept; Polyphase machine; d q Frame; Power electronics; Multiphase motors; Multiphase system; PWM invertors; Experimental result; Analysis method; Flux density; Voltage; multiphase space vector pulse-width modulation (SVPWM); nonsinusoidal voltage; Pulse duration modulation; Non sinusoidal signal; System analysis
• ISSN: 0885-8993; 1941-0107
• DOI: 10.1109/TPEL.2005.857551

Multiphase motors are usually designed to have the concentrated winding and nonsinusoidal airgap flux density distribution in order to maximize the torque per ampere. This means that the phase voltage of a multiphase motor has the nonsinusoidal waveform. Accordingly, the conventional analysis on a multiphase space vector pulse-width modulation (SVPWM), which is confined to a sinusoidal phase voltage, should be extended to a nonsinusoidal phase voltage. In this paper, based on a multiple d-q spaces concept a novel analysis on a multiphase SVPWM to synthesize an arbitrary nonsinusoidal phase voltage is proposed. Throughout this paper, a five-phase inverter is used as a practical example. The basic concepts can be easily extended to an n-phase inverter.