A power conversion system, comprising: a DC circuit comprising first and second DC current paths; an inverter comprising a multi-phase AC connection having three or more AC terminals for supplying multi-phase AC electrical power, and a switching network comprising a plurality of switching devices S7-S12 individually coupled between one of the DC current paths and one of the AC terminals, the switching devices S7-S12 individually operable to selectively electrically couple the corresponding DC current path with the corresponding AC terminal according to a corresponding switching control signal; and a switch control system operative to provide the switching control signals by pulse width modulation at least partially according to feedback signals or values Φ representing AC phase outputs and according to the position of a reference vector in a space vector modulation diagram having 6 stationary active space vectors around the periphery of the diagram and two stationary zero vectors at an origin of the diagram, the vectors representing unique switching states for the switching network and defining six triangular sectors positioned around the origin, the sectors each being defined by a unique set of two active vectors and the zero vectors at the corners of the corresponding triangular segment, the switch control system providing the switching control signals according to a selected switching sequence corresponding to the diagram sector in which the reference vector is currently located with each switching sequence using only active vectors with a first vector of each switching sequence differing by one phase switching state from a last vector of a switching sequence of an adjacent sector, the switch control system operative to selectively provide some of the switching control signals using active high pulse width modulation and other switching control signals using active low pulse width modulation, the switch control system comprising a deadtime compensation component operative to selectively increase or decrease one or more feedback signals or values Φ for deadtime compensation at switching state transitions within a pulse width modulation period T PWM based on use of active high or active low pulse width modulation, respectively, for the corresponding output phase. a DC circuit comprising first and second DC current paths; an inverter comprising a multi-phase AC connection having three or more AC terminals for supplying multi-phase AC electrical power, and a switching network comprising a plurality of switching devices S7-S12 individually coupled between one of the DC current paths and one of the AC terminals, the switching devices S7-S12 individually operable to selectively electrically couple the corresponding DC current path with the corresponding AC terminal according to a corresponding switching control signal; and a switch control system operative to provide the switching control signals by pulse width modulation at least partially according to feedback signals or values Φ representing AC phase outputs and according to the position of a reference vector in a space vector modulation diagram having 6 stationary active space vectors around the periphery of the diagram and two stationary zero vectors at an origin of the diagram, the vectors representing unique switching states for the switching network and defining six triangular sectors positioned around the origin, the sectors each being defined by a unique set of two active vectors and the zero vectors at the corners of the corresponding triangular segment, the switch control system providing the switching control signals according to a selected switching sequence corresponding to the diagram sector in which the reference vector is currently located with each switching sequence using only active vectors with a first vector of each switching sequence differing by one phase switching state from a last vector of a switching sequence of an adjacent sector, the switch control system operative to selectively provide some of the switching control signals using active high pulse width modulation and other switching control signals using active low pulse width modulation, the switch control system comprising a deadtime compensation component operative to selectively increase or decrease one or more feedback signals or values Φ for deadtime compensation at switching state transitions within a pulse width modulation period T PWM based on use of active high or active low pulse width modulation, respectively, for the corresponding output phase.