Dynamometer fault detection system
AssigneeFord Motor Company
InventorsMark A. Tascillo, Pravinchandra P. Chokshi, James E. Snider, Richard E. Smith
Life of this patent
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Abstract
In one embodiment of the present invention, a fault detection system for a dynamometer includes circuitry for measuring the armature voltage of the dynamometer. The voltage can used as an indicator of dynamometer speed to prevent reverse rotation of the dynamometer and to prevent overspeed operation of the dynamometer.
Claims9
A fault detection system for a DC dynamometer having an armature, said system comprising:
- detection means for detecting an armature voltage of said dynamometer;
- comparison means for comparing said voltage with a predetermined voltage threshold;
- and
- control means responsive to said comparison means for interrupting power to said dynamometer;
- wherein
- said predetermined voltage threshold represents a forward dynamometer speed threshold;
- and
- said control means interrupts power to said dynamometer if the detected armature voltage indicates a reverse rotation of said dynamometer or a forward rotation of said dynamometer at lower speed than said forward dynamometer speed threshold.
A fault detection system for a DC dynamometer having an armature, said system comprising:
- detection means for detecting an armature voltage of said dynamometer;
- comparison means for comparing said voltage with a predetermined voltage threshold;
- and
- control means responsive to said comparison means for interrupting power to said dynamometer;
- wherein
- said predetermined voltage threshold represents a zero dynamometer speed threshold;
- and
- said control means interrupts power to said dynamometer if the detected armature voltage indicates a reverse rotation of said dynamometer.
A fault detection system for a DC dynamometer having an armature, said system comprising:
- detection means for detecting an armature voltage of said dynamometer;
- comparison means for comparing said voltage with a predetermined voltage threshold;
- and
- control means responsive to said comparison means for interrupting power to said dynamometer;
- wherein
- said predetermined voltage threshold represents a reverse dynamometer speed threshold;
- and
- said control means interrupts power to said dynamometer if the detected armature voltage indicates a reverse rotation of said dynamometer at a greater speed than said reverse dynamometer speed threshold.
Dependencies are inferred from the claim text.