Carrier‐based pulse‐width modulation control strategy of five‐phase six‐bridge indirect matrix converter under unbalanced load. Issue 14 (1st November 2017)

• Record Type: Journal Article
• Authors: Wang, Rutian; Wang, Weiquan; Liu, Ruitong; Zhang, Jiawei; Mu, Xingjun
• Is Part Of: IET power electronics. Volume 10:Issue 14(2017)
• Page Start: 1932
• Page End: 1942
• Publication Date: 2017-11-01
• Subjects: PWM power convertors -- PWM invertors -- matrix convertors -- PWM rectifiers; carrier‐based pulse‐width modulation control strategy -- five‐phase six‐bridge indirect matrix converter -- unbalanced load -- three‐to‐five‐phase matrix converter -- five‐phase six‐bridge indirect MC topology -- midline bridge -- inverter stage -- neutral point voltage -- space vector PWM method -- SVPWM method -- five‐phase bridge duty ratios -- modulation wave calculation -- rectifier stage -- driving signals -- two‐stage power switches -- neutral voltage control -- zero‐sequence voltage -- symmetrical output voltage sinusoids; Power electronics -- Periodicals; 621.31705
• DOI: 10.1049/iet-pel.2017.0323
• Languages: English
• ISSNs: 1755-4535

Abstract

Abstract : To solve the problem that three‐to‐five‐phase matrix converter (MC) cannot supply symmetrical voltages to unbalanced loads, a topology of five‐phase six‐bridge indirect MC and a carrier‐based pulse‐width modulation (PWM) method are proposed. A midline bridge is added to the neutral point of five‐phase loads in inverter stage. The neutral point voltage is analysed and derived by space vector PWM (SVPWM) method for calculating the duty ratio of midline bridge. Calculations of other five‐phase bridge duty ratios of SVPWM method remain unchanged. All of the duty ratios are used to calculate modulation waves of rectifier stage and inverter stage. Driving signals of two‐stage power switches are generated by comparing the modulation waves with a carrier, which are used to control the neutral voltage as corresponding zero‐sequence voltage. Therefore, five symmetrical output voltage sinusoids are obtained under both balanced and unbalanced loads. Finally, simulation and experimental results are provided to verify the feasibility and validity of the proposed method.