SLIP CONTROL DEVICE FOR ELECTRIC VEHICLE

Title:

SLIP CONTROL DEVICE FOR ELECTRIC VEHICLE

Document Type and Number:

WIPO Patent Application WO/2014/196405

Kind Code:

A1

Abstract:

Provided is a slip control device for an electric vehicle capable of providing prompt control that eliminates a wheel slip by accurately determining the slip using only a rotation angle sensor employed in controlling the rotation of a motor. The slip control device comprises: a threshold calculation means (21) for calculating a threshold by calculating a normal angular acceleration of a motor in accordance with the operation amount of an accelerator; and an angular acceleration calculation means (22) for calculating the angular acceleration by differentiating the detected value of a rotation angle sensor (3a) twice. The slip control device further comprises: a slip determination means (23) for determining whether a wheel (7) driven by a motor (3) has slipped; and a torque limitation means (25) for limiting a torque when it is determined that there is a slip. The slip determination means (23) compares the calculated angular acceleration with the threshold, counts the number of consecutive determinations of the calculated angular acceleration exceeding the threshold, and determines there is a slip when the number reaches a prescribed value.

Inventors:

ZHANG YINGJIE (JP)
HIRATA JUNICHI (JP)

Application Number:

PCT/JP2014/063886

Publication Date:

December 11, 2014

Filing Date:

May 26, 2014

Export Citation:

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Assignee:

NTN TOYO BEARING CO LTD (JP)
ZHANG YINGJIE (JP)
HIRATA JUNICHI (JP)

International Classes:

B60L15/20; B60L9/18

Domestic Patent References:

WO2013077409A1

2013-05-30

Foreign References:

JPH02299402A	1990-12-11
JP2011105072A	2011-06-02
JP2006094594A	2006-04-06
JP2005186756A	2005-07-14
JP2012121447A	2012-06-28
JP2005047313A	2005-02-24
JPS63259141A	1988-10-26
JPH08182119A	1996-07-12

Other References: