Open AccessCarrier‐based pulse‐width modulation control strategy of five‐phase six‐bridge indirect matrix converter under unbalanced load
Author(s) -
Wang Rutian,
Wang Weiquan,
Liu Ruitong,
Zhang Jiawei,
Mu Xingjun
Publication year - 2017
Publication title -
iet power electronics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.637
H-Index - 77
eISSN - 1755-4543
pISSN - 1755-4535
DOI - 10.1049/iet-pel.2017.0323
Subject(s) - pulse width modulation , duty cycle , control theory (sociology) , modulation (music) , voltage , inverter , rectifier (neural networks) , topology (electrical circuits) , three phase , phase (matter) , space vector modulation , power (physics) , physics , engineering , computer science , electrical engineering , acoustics , stochastic neural network , control (management) , quantum mechanics , artificial intelligence , machine learning , recurrent neural network , artificial neural network
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.