Semiconductor Components Industries, LLC

Ami Semiconductor Belgium Bvba

Bart Decock

Francois Laulanet

Sam Vermeir

Peter Cox

An integrated circuit has drive circuitry to drive the windings of an electrical motor, means to make a measurement from the drive circuitry during rotation of the motor, suitable for use as motor control feedback, and has an output contact through which the motor control feedback measurement is available as an analog output signal. It can be used with an external motor control circuit coupled to receive the analog output signal to generate motor control signals, to control the drive circuitry. The analog feedback output gives more flexibility to the design of a motor control loop in terms of bit resolution, bandwidth and choice of discrete time or continuous time control.

Output contact for feedback in integrated circuit motor driver

A circuit for determining a direction of rotation of an electric motor, the motor having asymmetry and/or eccentricity in a profile of back electromotive force as a function of angular position of a rotor with respect to a stator, the circuit receiving a signal representing the BEMF, and use the corresponding asymmetry and/or eccentricity in the signal to derive the direction of rotation. The signal representing the back emf can be generated by a control circuit. The control circuit can have a feedback loop regulator to generate a control signal (TL or TR) to control a current drive circuit () to control an amplitude of current (i) in the windings, the feedback loop regulator being arranged to compare the amplitude of the current (i) in the windings with a reference value (i), and use the control signal to provide the signal representing the back electromotive force.

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Haacht, Belgium

Bart Decock