the dc power signal into an ac power signal and reducing the voltage from medium to low each converter may be a single phase active bridge circuit as discussed and illustrated in pct publication wo 2008 148613 which is herein incorporated by reference in its entirety the power supply may include multiple dc dc converters in series to gradually reduce the dc voltage from medium to low for the srm and bldc motors the low voltage dc signal may then be supplied to the motor controller for the induction motor the power supply may further include a three phase inverter for receiving the low voltage dc power signal from the dc dc converters and outputting a three phase low voltage ac power signal to the motor controller for the induction motor the motor controller may be a switchboard i e logic circuit for simple control of the motor at a nominal speed or a variable speed drive vsd for complex control of the motor the vsd controller may include a microprocessor for varying the motor speed to achieve an optimum for the given conditions the vsd may also gradually or soft start the motor thereby reducing start up strain on the shaft and the power supply and minimizing impact of adverse well conditions for the srm or bldc motors the motor controller may receive the low voltage dc power signal from the power supply and sequentially switch phases of the motor thereby supplying an output signal to drive the phases of the motor the output signal may be stepped trapezoidal or sinusoidal the bldc motor.