Control Strategy of Four-leg Indirect Matrix Converter for Reducing Common-mode Voltage
To reduce the common-mode voltage of four-leg indirect matrix converter,a new modulated model predictive control method is proposed.Firstly,the modulated model predictive control is used to find the optimal vector group at the rectifier stage and the inverter stage,respectively.Secondly,the zero vector of the inverter stage is allocated to the rectifier stage to eliminate the zero vector of the inverter stage,and the common-mode voltage is effectively reduced without changing the hardware circuit.Then,the sequence of each vector is redefined to ensure that only one switch on the bridge arm works in the whole sampling period.Finally,the simulation results verify the feasibility and effectiveness of the control strategy.
four-leg indirect matrix convertermodulated model predictive controlcontrol strategycommon-mode voltagezero vector
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