An electrical power generating system comprising a multiphase permanent magnet alternator and a current controlled shunt regulator, the current controlled shunt regulator comprising; a rectifier; a controller; and a plurality of field effect transistor FET shunts equal to the number of electrical phases of the permanent magnet alternator; wherein each of said FET shunts corresponds to a phase of the permanent magnet alternator and is connected in such a way as to allow power to travel unimpeded between said corresponding phase of said permanent magnet alternator and said rectifier when said FET shunt is off and redirect current from said corresponding phase of said permanent magnet alternator to neutral when said FET shunt is on; characterised in that: the current controlled shunt regulator further comprises a plurality of comparators, each of which has a comparator input connected to a corresponding phase of said permanent magnet alternator; each of said comparators is arranged to determine if a phase voltage of the corresponding phase is positive or negative, and is arranged to output a corresponding comparator control signal indicating that a corresponding FET shunt of the plurality of FET shunts should be turned on when the phase voltage is negative, and to not output the corresponding comparator control signal when the phase voltage of the corresponding phase is positive; wherein said controller is arranged to output a pulse width modulated controller control signal indicating whether the FET shunts should be turned on; wherein the current controlled shunt regulator further comprises a plurality of logical OR gates each corresponding to a FET shunt of the plurality of FET shunts, wherein each OR gate comprises a first input and a second input and is arranged to receive and combine the corresponding comparator control signal as the first input and the pulse width modulated controller control signal as the second input, and to output a FET shunt control signal to a gate of the corresponding FET shunt; wherein each of said FET shunts is arranged to receive the FET shunt control signal from a corresponding logical OR gate of the plurality of logical OR gates; wherein said controller is arranged to output the pulse width modulated controller control signal identically to each FET shunt so that all FET shunts are activated simultaneously whenever the controller indicates that the FET shunts should be turned on, and wherein each of said logical OR gates is arranged to output the FET shunt control signal to turn said corresponding FET shunt on whenever either the corresponding comparator control signal as the first input or the pulse width modulated controller control signal as the second input indicate that the corresponding FET shunt should be turned on. a rectifier; a controller; and a plurality of field effect transistor FET shunts equal to the number of electrical phases of the permanent magnet alternator; wherein each of said FET shunts corresponds to a phase of the permanent magnet alternator and is connected in such a way as to allow power to travel unimpeded between said corresponding phase of said permanent magnet alternator and said rectifier when said FET shunt is off and redirect current from said corresponding phase of said permanent magnet alternator to neutral when said FET shunt is on; the current controlled shunt regulator further comprises a plurality of comparators, each of which has a comparator input connected to a corresponding phase of said permanent magnet alternator; each of said comparators is arranged to determine if a phase voltage of the corresponding phase is positive or negative, and is arranged to output a corresponding comparator control signal indicating that a corresponding FET shunt of the plurality of FET shunts should be turned on when the phase voltage is negative, and to not output the corresponding comparator control signal when the phase voltage of the corresponding phase is positive; wherein said controller is arranged to output a pulse width modulated controller control signal indicating whether the FET shunts should be turned on; wherein the current controlled shunt regulator further comprises a plurality of logical OR gates each corresponding to a FET shunt of the plurality of FET shunts, wherein each OR gate comprises a first input and a second input and is arranged to receive and combine the corresponding comparator control signal as the first input and the pulse width modulated controller control signal as the second input, and to output a FET shunt control signal to a gate of the corresponding FET shunt; wherein each of said FET shunts is arranged to receive the FET shunt control signal from a corresponding logical OR gate of the plurality of logical OR gates; wherein said controller is arranged to output the pulse width modulated controller control signal identically to each FET shunt so that all FET shunts are activated simultaneously whenever the controller indicates that the FET shunts should be turned on, and wherein each of said logical OR gates is arranged to output the FET shunt control signal to turn said corresponding FET shunt on whenever either the corresponding comparator control signal as the first input or the pulse width modulated controller control signal as the second input indicate that the corresponding FET shunt should be turned on.