Common-mode voltage offsetSVPWM sectorFault diagnosisFault-tolerant controlT-type three-level inverters (T23LIs) are widely used in the electric drive system of new energy vehicles. However, the open-circuit (OC) faults of their switching devices will cause serious damage to the...
carrier offset control regulating unit to an SVPWM (space vector pulse width modulation) vector control unit; outputting a PWM signal through a drive circuit to control the working condition of the multilevel inverter, and meanwhile, controlling the mid-point voltage balance of a multilevel ...
(CC) Offset voltage calculation formula (5) or (10); (DD) SVPWM reference voltage calculation formula (7) or (10); (EE) Final reference voltage calculation formula (23); (FF) Balance switch On/Off (13); (GG) Sign_bal formula (16)~(22); (HH) Controller (14) or (15); (II) ...
When the switching operation does not need to be stopped, the offset voltage for space vector PWM (SVPWM) is injected into the reference voltage for high inverter load current quality. An offset voltage that varies according to the need to stop the switching operation is the proposed hybrid ...