ELECTRIC MOTOR CONTROL DEVICE AND ELECTRIC POWER STEERING DEVICE

Title:

ELECTRIC MOTOR CONTROL DEVICE AND ELECTRIC POWER STEERING DEVICE

Document Type and Number:

WIPO Patent Application WO/2019/092777

Kind Code:

A1

Abstract:

Provided are an electric motor control device and an electric power steering device capable of suppressing torque variation due to a low angle-detection resolution by a simple calculation even under the condition that the rotational speed of an electric motor is low. When the frequency of change of an angle detection value is lower than the cutoff frequency of a feedback control system for controlling a rotational state, the electric motor control device estimates, on the basis of a current command value, an angle error correlation value correlating with an angle detection error, corrects the current command value or the angle detection value on the basis of the estimated value of the angle error correlation value, and changes the estimated value of the angle error correlation value so that the absolute value of the angle detection error increases with respect to the increase of the current command value and the absolute value of the angle detection error decreases with respect to the decrease of the current command value.

Inventors:

TANAKA KENTA (JP)
KEZOBO ISAO (JP)
FURUKAWA AKIRA (JP)
SAWADA SEIJI (JP)

Application Number:

PCT/JP2017/040064

Publication Date:

May 16, 2019

Filing Date:

November 07, 2017

Export Citation:

Click for automatic bibliography generation Help

Assignee:

MITSUBISHI ELECTRIC CORP (JP)

International Classes:

H02P21/22; H02P21/04; H02P21/05

Domestic Patent References:

WO2016117029A1

2016-07-28

Foreign References:

JP2014225993A	2014-12-04
JP2013034281A	2013-02-14
JP2010148248A	2010-07-01
JP2011117769A	2011-06-16
JP2002369569A	2002-12-20
JP2006304478A	2006-11-02

Other References: