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US 9,804,227 B2Granted
Electric machine fast transient condition detection
AssigneeFord Global Technologies, LLC
InventorsJi Wu, Joe Youqing Xiang
Life of this patent
Estimating the term…
Abstract
During a transient operating condition in an electric machine, a diagnostic routine associated with the electric machine may erroneously indicate a fault. According to the disclosure, a flag is set when a transient condition is detected. The flag is communicated to the diagnostic routine. The output of the diagnostic routine may be altered when the flag is set, i.e., when a transient is detected.
Claims13
An electric machine system, comprising:
- an electric machine;
- and
- an electronic control unit (ECU) receiving electric machine signals and altering a response of a diagnostic routine during a transient condition associated with a counter exceeding zero, the ECU incrementing the counter a first amount and decrementing the counter a second amount in response to a change in the electric machine signals exceeding and not exceeding an associated threshold, respectively.
A system for an electric machine, comprising:
- a controller configured to control the electric machine in response to a counter exceeding a predetermined value for a predetermined period of time, the controller incrementing the counter by a first value and decrementing the counter by a second value less than the first value in response to magnitude of a change in an electric machine signal exceeding or not exceeding, respectively, a threshold.
A system for detecting a transient condition, comprising:
- an electric machine;
- and
- an electronic control unit (ECU) that controls the electric machine based on a counter exceeding a predetermined value, the ECU incrementing and decrementing the counter by first and second amounts, respectively, unless decrementing the counter would result in a value below the predetermined value, in response to a magnitude of rate of change in an electric machine signal relative to a threshold.
Dependencies are inferred from the claim text.