ELECTRIC AUTOMOBILE - NTN TOYO BEARING CO LTD

Title:

ELECTRIC AUTOMOBILE

Document Type and Number:

WIPO Patent Application WO/2012/114900

Kind Code:

A1

Abstract:

Provided is an electric automobile that swiftly takes appropriate countermeasures when there has been a performance degradation such as demagnetization of motor permanent magnets. An inverter device (22) or an ECU (21) is provided with: a magnetism estimation means (38) that estimates the magnetism of the permanent magnets of the rotor of a motor (6); a determination means (39) thereof; and an abnormality response motor drive control means (40). The magnetism estimation means (38) estimates magnetism in accordance with a prescribed rule from at least two detection signals among a motor rotational frequency, a motor voltage, and a motor current. The determination means (39) determines whether or not the estimated magnetism is within a set tolerance range. The abnormality response motor drive control means (40) controls the driving of the motor by the inverter device (22) in accordance with determination results by the determination means (39) that there is an abnormality.

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Inventors:

OZAKI TAKAYOSHI (JP)

Application Number:

PCT/JP2012/053059

Publication Date:

August 30, 2012

Filing Date:

February 10, 2012

Export Citation:

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Assignee:

NTN TOYO BEARING CO LTD (JP)
OZAKI TAKAYOSHI (JP)

International Classes:

H02P27/06; B60K7/00; B60L3/00; F16H1/32; B60L15/20

Foreign References:

JP2010268566A	2010-11-25
JP2005192325A	2005-07-14
JP2010110042A	2010-05-13
JP2008168790A	2008-07-24
JP2006258289A	2006-09-28
JP2004328819A	2004-11-18
JP2008168790A	2008-07-24

Other References: