A power conversion system, comprising: first and second rectifiers individually comprising a rectifier input to receive AC electrical input power, a rectifier DC output with first (A1, C1) and second (B1, D1) DC output nodes, and a circuit operative to provide DC output power at the rectifier DC output, the rectifier inputs of the first and second rectifiers being coupled with one another; first and second inverters individually comprising an inverter DC input with first (A2, C2) and second (B2, D2) DC input nodes, an inverter AC output, and an inverter switching network operative to provide AC output power to a load, the inverter AC outputs of the first and second inverters being coupled with one another; the power conversion system being characterised by comprising a single choke comprising: a first coil (LA) coupled between the first DC output node (A1) of the first rectifier and the first DC input node (A2) of the first inverter; a second coil (LB) coupled between the second DC output node (B1) of the first rectifier and the second DC input node (B2) of the first inverter; a third coil (LC) coupled between the first DC output node (C1) of the second rectifier and the first DC input node (C2) of the second inverter; and a fourth coil (LD) coupled between the second DC output node (D1) of the second rectifier and the second DC input node (D2) of the second inverter. first and second rectifiers individually comprising a rectifier input to receive AC electrical input power, a rectifier DC output with first (A1, C1) and second (B1, D1) DC output nodes, and a circuit operative to provide DC output power at the rectifier DC output, the rectifier inputs of the first and second rectifiers being coupled with one another; first and second inverters individually comprising an inverter DC input with first (A2, C2) and second (B2, D2) DC input nodes, an inverter AC output, and an inverter switching network operative to provide AC output power to a load, the inverter AC outputs of the first and second inverters being coupled with one another; the power conversion system being characterised by comprising a single choke comprising: a first coil (LA) coupled between the first DC output node (A1) of the first rectifier and the first DC input node (A2) of the first inverter; a second coil (LB) coupled between the second DC output node (B1) of the first rectifier and the second DC input node (B2) of the first inverter; a third coil (LC) coupled between the first DC output node (C1) of the second rectifier and the first DC input node (C2) of the second inverter; and a fourth coil (LD) coupled between the second DC output node (D1) of the second rectifier and the second DC input node (D2) of the second inverter. a first coil (LA) coupled between the first DC output node (A1) of the first rectifier and the first DC input node (A2) of the first inverter; a second coil (LB) coupled between the second DC output node (B1) of the first rectifier and the second DC input node (B2) of the first inverter; a third coil (LC) coupled between the first DC output node (C1) of the second rectifier and the first DC input node (C2) of the second inverter; and a fourth coil (LD) coupled between the second DC output node (D1) of the second rectifier and the second DC input node (D2) of the second inverter. <EOS>