JP2008062916A5 - - Google Patents

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JP2008062916A5
JP2008062916A5 JP2007150163A JP2007150163A JP2008062916A5 JP 2008062916 A5 JP2008062916 A5 JP 2008062916A5 JP 2007150163 A JP2007150163 A JP 2007150163A JP 2007150163 A JP2007150163 A JP 2007150163A JP 2008062916 A5 JP2008062916 A5 JP 2008062916A5
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temperature
value
unit
phase current
ambient temperature
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JP2007150163A
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JP5092553B2 (en
JP2008062916A (en
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Claims (5)

操舵補助力発生用の電動モータを有し、当該電動モータのモータ系統においてその構成部品の温度検出を行う温度検出装置を備えた電動パワーステアリング装置において、
前記温度検出装置は、
前記電動モータの相電流を検出する相電流検出手段と、
前記電動モータ及びその駆動電流通電経路に配置されているモータ系統の構成部品のうち温度検出対象の構成部品の周囲温度を測定する周囲温度測定手段と、
前記相電流検出手段で検出される相電流検出値を用いて、前記温度検出対象の構成部品の通電に伴う温度上昇分を推定し、当該温度上昇分と前記周囲温度測定手段で測定した温度測定値との和から前記温度検出対象の構成部品の温度を推定する温度推定手段と、を有し、
前記周囲温度測定手段は、その異常監視を行う監視手段を備え、
前記温度推定手段は、前記監視手段で前記周囲温度測定手段の異常を検出したときには、前記周囲温度測定手段の温度測定値に代えて、温度検出対象の構成部品に対応する、前記構成部品毎に予め設定された推定用周囲温度を用いて、前記温度検出対象の構成部品の温度推定を行うことを特徴とする電動パワーステアリング装置。 In an electric power steering apparatus having an electric motor for generating a steering assist force and having a temperature detection device for detecting the temperature of its components in the motor system of the electric motor,
The temperature detector is
And the phase current detecting means for detecting a phase current of the electric motor,
Ambient temperature measuring means for measuring the ambient temperature of the temperature detection target component among the electric motor and the motor system component arranged in the drive current energization path;
Using the phase current detection value detected by the phase current detection unit, the temperature increase due to energization of the temperature detection target component is estimated, and the temperature measurement measured by the temperature increase and the ambient temperature measurement unit a temperature estimation means from the sum of the value for estimating the temperature of the components of the temperature detection target, and
The ambient temperature measuring means includes monitoring means for monitoring the abnormality,
The temperature estimating unit detects, when the monitoring unit detects an abnormality in the ambient temperature measuring unit, instead of the temperature measurement value of the ambient temperature measuring unit, corresponding to the component to be detected for each component. An electric power steering apparatus characterized in that the temperature of the component to be detected is estimated using a preset ambient temperature for estimation. 前記電動モータが回転状態及び停止状態の何れの状態にあるかを検出するモータ動作状態検出手段と、Motor operating state detecting means for detecting whether the electric motor is in a rotating state or a stopped state;
前記温度推定手段で推定される温度上昇分の演算過程における演算値に、温度検出対象の構成部品毎に予め設定された前記電動モータの動作状態に起因する温度上昇率差補正用の補正値を加算又は減算して前記温度上昇分を補正する補正手段と、を備えることを特徴とする請求項１記載の電動パワーステアリング装置。  A correction value for correcting the temperature increase rate caused by the operating state of the electric motor preset for each temperature detection target component is added to the calculation value in the calculation process of the temperature increase estimated by the temperature estimation means. The electric power steering apparatus according to claim 1, further comprising a correction unit that corrects the temperature increase by addition or subtraction. 前記温度推定手段は、前記相電流検出手段で検出される相電流検出値の二乗積算値の平均を算出する二乗積算平均部と、該二乗積算平均部で算出した平均値をフィルタ処理して前記温度上昇分を推定するフィルタ部とを備え、The temperature estimating means filters the square integrated average part for calculating an average of square integrated values of the phase current detection values detected by the phase current detecting means, and filters the average value calculated by the square integrated average part. A filter unit for estimating the temperature rise,
前記補正手段は、前記フィルタ部に入力される前記二乗積算平均部で算出した平均値に対して補正を行うことを特徴とする請求項２記載の電動パワーステアリング装置。  The electric power steering apparatus according to claim 2, wherein the correction unit corrects the average value calculated by the square integration average unit input to the filter unit. 前記推定用周囲温度は、前記温度検出対象の構成部品の周囲温度が取り得る最高値相当の値に設定されることを特徴とする請求項１から請求項３の何れか１項に記載の電動パワーステアリング装置。 The electric motor according to any one of claims 1 to 3, wherein the estimation ambient temperature is set to a value corresponding to a maximum value that can be taken by an ambient temperature of the temperature detection target component. Power steering device. 前記相電流検出値を用いて、前記温度検出対象の構成部品の前記温度上昇率差補正用の補正値を算出する補正値算出手段を備えることを特徴とする請求項１から請求項４の何れか１項に記載の電動パワーステアリング装置。 The correction value calculation means for calculating a correction value for correcting the temperature increase rate difference of the temperature detection target component using the phase current detection value is provided. The electric power steering device according to claim 1.
JP2007150163A 2006-08-10 2007-06-06 Electric power steering device Active JP5092553B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2007150163A JP5092553B2 (en) 2006-08-10 2007-06-06 Electric power steering device

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2006218741 2006-08-10
JP2006218741 2006-08-10
JP2007150163A JP5092553B2 (en) 2006-08-10 2007-06-06 Electric power steering device

Publications (3)

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JP2008062916A JP2008062916A (en) 2008-03-21
JP2008062916A5 true JP2008062916A5 (en) 2010-06-24
JP5092553B2 JP5092553B2 (en) 2012-12-05

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Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5656793B2 (en) * 2011-10-11 2015-01-21 オムロンオートモーティブエレクトロニクス株式会社 Electronic control unit
EP2813414B1 (en) * 2012-02-06 2018-04-04 NSK Ltd. Electric power steering device
KR101500854B1 (en) * 2013-08-23 2015-03-10 계양전기 주식회사 Motor control apparatus having protection function and method using the same
WO2016035187A1 (en) * 2014-09-04 2016-03-10 三菱電機株式会社 Abnormality detection device and abnormality detection method
JP6361541B2 (en) 2015-03-20 2018-07-25 株式会社デンソー Control device for rotating electrical machine
JP6468142B2 (en) * 2015-09-16 2019-02-13 トヨタ自動車株式会社 In-vehicle relay temperature detection system
EP3465117B1 (en) * 2016-06-03 2020-05-27 thyssenkrupp Presta AG Coil temperature estimation
CN109863684B (en) * 2016-09-02 2023-06-06 康斯博格股份有限公司 Technique for limiting current supplied to motor in electric power steering system
DE102017215842A1 (en) 2017-09-08 2019-03-14 Robert Bosch Gmbh Method for operating a steering device and steering device

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JP3715136B2 (en) * 1999-06-03 2005-11-09 トヨタ自動車株式会社 Electric power steering device
JP3938472B2 (en) * 2001-01-16 2007-06-27 日本精工株式会社 Electric power steering device
JP4027182B2 (en) * 2002-08-22 2007-12-26 本田技研工業株式会社 Control method of electric power steering apparatus
JP4291015B2 (en) * 2003-03-06 2009-07-08 本田技研工業株式会社 Output limiting method and output limiting device for electric power steering apparatus
JP2006044437A (en) * 2004-08-04 2006-02-16 Nsk Ltd Electric power steering device

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