Microsemi Corporation

Microsemi Soc Corporation

Ge Energy Power Conversion Technology Gmbh

Battu Prakash Reddy

Ganesh Shaga

Sami Siala

Ashwin Murali

A method for controlling the drive current in a stepper motor includes measuring stepper motor current, computing a load angle of the stepper motor, calculating a torque ratio of the stepper motor, generating a reference current as a function of the torque ratio and a maximum current setting for the stepper motor, and setting the drive current of the stepper motor as a function of the reference current.

Apparatus and method for sensorless detection of load torque of a stepper motor and for optimizing drive current for efficient operation

An angular position sensor comprising at least one planar excitation coil and at least two planar sensing coils positioned within an interior of the at least one planar excitation coil, each of the at least two planar sensing coils comprising a clockwise winding portion positioned opposite a counter-clockwise winding portion and a rotatable inductive coupling element comprising a sector aperture, the rotatable inductive coupling element positioned in overlying relation to the at least one planar excitation coil and separated from the at least one planar excitation coil by an air gap.

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Hyderabad Telangana, India

Battu Prakash Reddy