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This paper proposes a synchronous switching technique for a Vienna rectifier that uses carrier-based pulse width modulation (CB-

PWM). A three-phase Vienna rectifier, similar to a three-level T-type converter with three back-to-back switches, is used as a PWM

rectifier. Conventional CB-PWM requires six independent gate signals to operate back-to-back switches. When internal switches are

operated synchronously, only three independent gate signals are required, which simplifies the construction of gate driver circuits.

However, with this method, total harmonic distortion of the input current is higher than that with conventional CB-PWM switching.

A reactive current injection technique is proposed to improve current distortion. The performance of the proposed synchronous

switching method and the effectiveness of the reactive current injection technique are verified using simulations and experiments

performed with a set of Vienna rectifiers rated at 5 kW.