Carrier phase-shifting controller based on multi-winding transformer

The invention discloses a carrier phase-shifting controller based on a multi-winding transformer. The carrier phase-shifting controller comprises a carrier phase-shifting modulator (2), wherein carrier Uci amplitudes of N power modules (6) are the same, and phases are respectively 0, Ts/M, Ts*2/M, ..., Ts*(M-1)/M, wherein Ts is a carrier period, a phase-shifting coefficient M is any integer smaller than and equal to N. Modulating waves Uri of the N power modules (6) use carrier Uci to perform SPWM (sinusoidal pulse width modulation), so that PWM (pulse-width modulation) pulses are generated. In order to solve non-current sharing, caused by carrier phase shifting, of power modules (6), a current-sharing controller (3) is introduced. The carrier phase-shifting controller improves equivalent switching frequency of the system by M times (M being a module number of carrier phase shifting), effectively lowers switching frequency, reduces system switching loss and improves device efficiency. Meanwhile, the simple current-sharing controller (3) is adopted to restrain non-current sharing of the power modules.