Three phase inverter circuit with improved transition from SVPWM to six step operation

摘要: When negative times are calculated for zero space vectors of a SVPWM controlled three phase inverter circuit, the vector set to zero, non-zero closer commanded is preserved, and farther from truncated. Thus, control circuit seamlessly transits full six step operation. In one arrangement, each time, larger minimum its time pulse width modulation period (TPWM), smaller equal TPWM less value times. another algebraically combined with If resulting greater than or it used together vectors. zero. For both these arrangements,