Patent ID: 8698432
Filing Date: 2014-04-15
Classification: H02P

Abstract:
1. A method for controlling a rotating motor, wherein the motor comprises a plurality of electromagnets, wherein each electromagnet comprises a respective coil, the method comprising: measuring the value of a supply voltage; receiving an input command to adjust a speed of rotation of the rotating motor; determining and scaling the value of a duty cycle of a pulse width modulated control signal based on the input command and on the measured value of the supply voltage; and generating an output voltage adjusted to a motor rating in one or more of the coils using the control signal to obtain a desired value of the respective current, wherein the control signal controls two switching transistors whose switching paths are coupled in series between the supply voltage and ground wherein a node between the switching paths is connected to a coil of the motor and wherein the switching transistor pair and the coil are operated as a buck voltage regulator.