Motor driver and system with phase-spaced redundancy
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United States of America Patent
Stats
-
Nov 9, 2004
Grant Date -
Mar 20, 2003
app pub date -
Aug 30, 2002
filing date -
Sep 19, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A controller for a motor is provided. The motor includes N redundant M-phase rotor/stator combinations (where N and M are both integers greater than 1). The controller includes N driver circuits each having M outputs. Each of the M outputs of a respective one of the N driver circuits provides pulse-width modulated (PWM) current pulses to a corresponding phase winding in a respective one of the redundant M-phase rotor/stator combinations. Furthermore, the controller includes a control unit operatively coupled to the N driver circuits for providing phase spacing between the N driver circuits. As a result, current pulses provided by the N driver circuits to a same phase winding in each of the redundant M-phase rotor/stator combinations are offset in phase.
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