to the output of the position sensor 124 and develops a series of addresses which are in turn provided to addressing inputs of a memory 126 which may comprise for example an eprom the memory 126 develops a series of eight bit words at memory outputs which are in turn provided to a base drive isolation circuit 127 that in turn develops base drive signals for the switches q7 q14 as seen in fig7 each power switch is turned for 30 u00b0 of each 120 u00b0 of rotation of the rotor 123 more particularly the switches q7 and q8 and turned on in the interval between 0 u00b0 and 30 u00b0 the switches q11 and q12 are turned on in the interval between 30 u00b0 and 60 u00b0 the switches q9 and q10 are turned on the interval between 60 u00b0 and 90 u00b0 and the switches q13 and q14 are turned on the interval between 90 u00b0 and 120 u00b0 the sequence described above thereafter repeats as the rotor 123 rotates beyond 120 u00b0 as seen in fig4 a total of 8 feeders are required to connect the windings w1 w4 to the power converter 26 one coupled to each end of each winding fig8 illustrates an alternative embodiment of the power converter 26 which requires only five feeders the converter includes a diode d25 coupled between the rectifier filter circuit 108 and a dc conductor 130 coupled to the dc conductor 130 is an upper power switch q15 together with an.