in fig5 c represents motor operation over the entire operating cycle fig3 shows a diagram of the current comparitor circuit used to process the feedback voltage produced by the dcct and comprises a first schottky diode 117 a second schottky diode 118 a positive threshold comparitor 71 a negative threshold comparitor 72 and a logic module 81 the anode of the first schottky diode 117 is connected to the first input of the positive threshold comparator 71 the second input of the positive threshold comparator 71 is connected to ground the anode of the second schottky diode 118 is connected to the second input of the negative threshold comparator 72 the first input of the second threshold comparator 72 is connected to ground the feedback voltage produced in the dcct is connected to the anode of the first schottky diode 117 and the cathode of the second schottky diode 118 at the input 80 of the current comparitor circuit the anode of the first schottky diode 117 is connected to the positive threshold comparitor 71 the cathode of the second schottky diode 118 is connected to the negative threshold comparitor 72 when the current into the positive terminal of the inverter bridge circuit reference number 11b in fig4 is positive the feedback voltage at the input terminal 80 of the current comparitor is positive the output 75 of the positive threshold comparitor 71 is positive and the output 76 of the negative threshold.