DETERIORATION DIAGNOSTIC DEVICE AND DEGRADATION DIAGNOSTIC METHOD FOR ON-VEHICLE ROTARY ELECTRIC MACHINE

• Main Authors: INNAN TOSHIO, HANAI TAKASHI
• Format: Patent
• Language: English
• Published: 06.02.2014
• Subjects: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; DYNAMO-ELECTRIC MACHINES; ELECTRICITY; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERATION; MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TESTING; TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES; TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR

PROBLEM TO BE SOLVED: To accurately estimate a life of a rotary electric machine in an operational state taking into consideration working environment and conditions.SOLUTION: A deterioration diagnostic device includes: a temperature sensor which detects a coil temperature of a rotary electric machine mounted on a vehicle; storage means for storing an estimated life at a prescribed pre-measured temperature of the rotary electric machine; and computation means for acquiring coil temperature data accompanying use of the rotary electric machine which is detected by a temperature sensor, integrating use time corresponding to the prescribed temperature of the estimated life on the basis of the Arrhenius law and determining a deteriorated state in the estimated life.