Fault handling of inverter driven PM motor drives
First Claim
1. A method for controlling a multi-phase inverter of a PM motor comprising:
- detecting a fault;
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sensing whether a speed signal indicates that a speed of the PM motor is greater than a transition speed;
applying an open-circuit response when the speed of the PM motor is greater less than the transition speed when the fault is detected; and
applying a short-circuit response when the sped of the PM motor is less greater than the transition speed when the fault is detected, wherein the transition speed is one of a fixed predetermined speed and an adjusted predetermined speed.
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Accused Products
Abstract
An apparatus includes a multi-phase inverter, a fault detector to indicate a detection of a fault, a sensor to provide a speed signal indicative of whether a speed of a PM motor is greater than a transition speed, and a controller. The controller is operable to apply either an open-circuit response or a short-circuit response to the multi-phase inverter. The open-circuit response is applied when the speed of the PM motor is greater less than the transition speed and a fault is detected. The short-circuit response is applied when the speed of the PM motor is less greater than the transition speed and the fault is detected. The transition speed is either a fixed predetermined speed or an adjusted predetermined speed.
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Citations
15 Claims
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1. A method for controlling a multi-phase inverter of a PM motor comprising:
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detecting a fault;
;sensing whether a speed signal indicates that a speed of the PM motor is greater than a transition speed;
applying an open-circuit response when the speed of the PM motor is greater less than the transition speed when the fault is detected; and
applying a short-circuit response when the sped of the PM motor is less greater than the transition speed when the fault is detected, wherein the transition speed is one of a fixed predetermined speed and an adjusted predetermined speed. - View Dependent Claims (2, 3, 4, 5)
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6. An apparatus comprising:
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a multi-phase inverter;
a fault detector to indicate a detection of a fault;
a sensor to provide a speed signal indicative of whether a speed of a PM motor is greater than a transition speed; and
a controller operable to apply an open-circuit response to the multi-phase inverter when the speed of the PM motor is greater less than the transition speed and a fault is detected, and additionally operable to apply a short-circuit response to the multi-phase inverter when the speed of the PM motor is less greater than the transition speed and the fault is detected, wherein the transition speed is one of a fixed predetermined speed and an adjusted predetermined speed. - View Dependent Claims (7, 8, 9, 10)
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11. A machine-readable medium comprising sets of instructions operable in a controller to cause the controller to perform operations comprising:
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applying an open-circuit response to a multi-phase inverter when a speed signal from a sensor indicates that a speed of a PM motor is greater less than a transition speed when a fault is detected; and
applying a short-circuit response to the multi-phase inverter when the speed signal indicates that the speed of the PM motor is less greater than the transition speed when the fault is detected, wherein the transition speed is one of a fixed predetermined speed and an adjusted predetermined speed. - View Dependent Claims (12, 13, 14, 15)
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Specification