MOTOR DRIVE CIRCUIT FOR A MECHANICAL CIRCULATORY SUPPORT DEVICE

Abstract

Methods and apparatus for driving a motor of a mechanical circulatory support device are provided. The method includes generating a pulse width modulated (PWM) drive signal, selectively filtering the PWM drive signal driving a first motor phase having a high state, sensing a back electro-motive force (back EMF) signal induced in a second motor phase not being driven by the PWM drive signal, determining a rotor position based on the back EMF signal, and modifying the PWM drive signal based on the rotor position.

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