Method of detecting a malfunction of an encoder for a...

Details Method of detecting a malfunction of an encoder for a... Method of detecting a malfunction of an encoder for a...

2007-06-22

2009-11-10

Hollington, Jermele M (Department: 2829)

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Lumped type parameters

Reexamination Certificate

active

07616023

ABSTRACT:
A method of detecting a malfunction of an encoder used in a vehicle drive system includes determining an error of a motor speed based on an estimated motor speed, wherein the estimated motor speed is a function of measured current over a predetermined interval of time. The method further includes determining a maximum allowable error of the motor speed at the measured current. Yet further, the method includes comparing the error of the motor speed with the maximum allowable error of the motor speed, thereby detecting the malfunction of the encoder.

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