POWER STATE DIAGNOSIS METHOD AND APPARATUS
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Abstract
[Problem]
An object of the present invention is to provide a power state diagnosis method and a power state diagnosis apparatus that pass and increase not only a d-axis current but also a q-axis current to a current value that a steering behavior does not occur to perform a diagnosis in the vector control of a motor, and determine that a power supply degraded, that the power supply is normal and that the diagnosis is not completed without giving an uncomfortable feeling to a driver, detecting a timing that there is not a driver, and needing to comprise a plurality of actuators.
[Means for solving the problem]
The present invention is a power state diagnosis method that diagnoses a power state of a vehicle which comprises an electrical control system supplied from a power supply and a motor controlled by a vector control method, comprising: gradually increasing a d-axis current to a current value that a steering behavior does not occur and applying the d-axis current, concurrently gradually increasing a q-axis current that is a rectangular-wave with positive and negative directions to the current value and applying the q-axis current, and determining degradation of the power supply when a voltage value of the power supply is equal to or less than a power supply threshold and a given period of time T1 elapses.
7 Citations
25 Claims
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1-9. -9. (canceled)
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10. A power state diagnosis method that diagnoses a power state of a vehicle which comprises an electrical control system supplied from a power supply and a motor controlled by a vector control method, comprising:
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gradually increasing a d-axis current to a current value that a steering behavior does not occur and applying said d-axis current, concurrently gradually increasing a q-axis current that is a rectangular-wave with positive and negative directions to said current value and applying said q-axis current, and determining degradation of said power supply when a voltage value of said power supply is equal to or less than a power supply threshold and a given period of time T1 elapses. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. A power state diagnosis apparatus that diagnoses a power state of a vehicle which comprises an electrical control system supplied from a power supply and a motor controlled by a vector control method, comprising:
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a d-axis current generating section that gradually increases a d-axis current to a current value that a steering behavior does not occur and applies said d-axis current; a q-axis current generating section that gradually increases a q-axis current that is a rectangular-wave with positive and negative directions to said current value and applies said q-axis current; a power supply voltage determining section that determines whether a voltage value of said power supply is equal to or less than a power supply threshold or not; a time determining section that determines elapse of the time; and a diagnosis determining section that determines degradation of said power supply when said power supply voltage determining section determines that said voltage value is equal to or less than said power supply threshold, and said time determining section determines that a period of time T1 elapses after said voltage value becomes equal to or less than said power supply threshold. - View Dependent Claims (20, 21, 22, 23, 24, 25)
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Specification