A buck/boost rectifier connectable to an alternating current power source, the rectifier comprising: an upper bus; a lower bus; an upper rectifier coupled to the upper bus; a lower rectifier coupled in a series-type relationship with the upper rectifier between the upper bus and the lower bus; a first phase input coupled between the upper rectifier and the lower rectifier; a pulse-width-modulation, PWM, controller configured to boost a direct current voltage output by the buck/boost rectifier; and a phase-angle, PA, controller configured to buck the DC voltage output by the buck/boost rectifier, characterized in that the upper rectifier includes a first diode, a first insulated gate bipolar transistor, IGBT,, a second IGBT and a second diode, a cathode of the first diode coupled to the lower rectifier, an anode of the first diode coupled to an emitter of the first IGBT, a collector of the first IGBT coupled to the upper bus, an emitter of the second IGBT coupled to the anode of the second diode, a cathode of the second diode connected to the upper bus, and a collector of the second IGBT coupled to the lower rectifier; and/or the lower rectifier includes a first diode, a first insulated gate bipolar transistor, IGBT,, a second IGBT and a second diode, a cathode of the first diode coupled to the lower bus, an anode of the first diode coupled to an emitter of the first IGBT, a collector of the first IGBT coupled to the upper rectifier, an emitter of the second IGBT coupled to the anode of the second diode, a cathode of the second diode connected to the upper rectifier, and a collector of the second IGBT coupled to the lower bus, wherein the PWM controller is arranged to boost and the PA controller is arranged to buck the output of the buck/boost rectifier by providing signals to the gates of the IGBTs. an upper bus; a lower bus; an upper rectifier coupled to the upper bus; a lower rectifier coupled in a series-type relationship with the upper rectifier between the upper bus and the lower bus; a first phase input coupled between the upper rectifier and the lower rectifier; a pulse-width-modulation, PWM, controller configured to boost a direct current voltage output by the buck/boost rectifier; and a phase-angle, PA, controller configured to buck the DC voltage output by the buck/boost rectifier, characterized in that the upper rectifier includes a first diode, a first insulated gate bipolar transistor, IGBT,, a second IGBT and a second diode, a cathode of the first diode coupled to the lower rectifier, an anode of the first diode coupled to an emitter of the first IGBT, a collector of the first IGBT coupled to the upper bus, an emitter of the second IGBT coupled to the anode of the second diode, a cathode of the second diode connected to the upper bus, and a collector of the second IGBT coupled to the lower rectifier; and/or the lower rectifier includes a first diode, a first insulated gate bipolar transistor, IGBT,, a second IGBT and a second diode, a cathode of the first diode coupled to the lower bus, an anode of the first diode coupled to an emitter of the first IGBT, a collector of the first IGBT coupled to the upper rectifier, an emitter of the second IGBT coupled to the anode of the second diode, a cathode of the second diode connected to the upper rectifier, and a collector of the second IGBT coupled to the lower bus, wherein the PWM controller is arranged to boost and the PA controller is arranged to buck the output of the buck/boost rectifier by providing signals to the gates of the IGBTs.