Patent ID: 7675256

Claim:
a controller for a direct current brushless motor connected to a high voltage control system, comprising a microprocessor; an input/output interface circuit connected between said high voltage control system and said microprocessor; a rotor position sensing circuit; an integrated power module; a current-sensing circuit for sensing current flowing through the motor; and a power source circuit for supplying power to said microprocessor, said integrated power module, said input/output interface circuit, said current-sensing circuit, and said rotor position sensing circuit; wherein said input/output interface circuit is a step-down circuit for transforming high voltage alternating current control signal into a low-voltage direct current control signal; an input end of said rotor position sensing circuit is connected to an output end of said integrated power module; an output end of said rotor position sensing circuit is connected to an input end of said microprocessor; an input end of said current-sensing circuit is connected to an output end of the integrated power module; an output end of the current-sensing circuit is connected to an input end of said microprocessor; and said step-down rectifying circuit comprises a photoelectric isolation means.