To correct an error included in a measured value of a rotation angle of a rotor being a rotating body with a simple method without using external measurement means.SOLUTION: A rotation angle arithmetic device comprises: a sensor 24 that outputs a detection signal in accordance with a rotation of a rotor; a rotation angle arithmetic unit 51 that performs arithmetic operation of a measurement angle being a measured value of a rotation angle of the rotor on the basis of the detection signal; an estimation angle arithmetic unit 82 that performs arithmetic operation of an estimation angle being an estimated value of the rotation angle of the rotor on the basis of the measurement angle of the rotor during an inertial rotation; a first correction value arithmetic unit 56 that performs arithmetic operation of a first collection value on the basis of a difference between the measurement angle and the estimation angle; a second correction value arithmetic unit 102 that calculates a second correction value correcting a phase of the measurement angle so that a rotational speed difference when a motor is driven in each of a clockwise rotation and a clockwise rotation on the basis of the measurement angle is reduced; and angle correction units 52 and 53 correcting the measurement angle on the basis of the first correction value and the second correction value.SELECTED DRAWING: Figure 3
【課題】回転体であるロータの回転角度の測定値に含まれる誤差を、外部の測定手段を用いずに簡易な方法で補正する。【解決手段】回転角度演算装置は、ロータの回転に応じた検出信号を出力するセンサ24と、検出信号に基づいてロータの回転角度の測定値である測定角度を演算する回転角度演算部51と、ロータが惰性回転中の測定角度に基づいて、ロータの回転角度の推定値である推定角度を演算する推定角度演算部82と、測定角度と推定角度との間の差分に基づいて第1補正値を演算する第1補正値演算部56と、測定角度に基づいてモータを時計回り及び反時計回りにそれぞれ駆動したときの回転速度差が減少するように測定角度の位相を補正する第2補正値を算出する第2補正値演算部102と、第1補正値および第2補正値に基づいて測定角度を補正する角度補正部52、53を備える。【選択図】図3
CORRECTION METHOD OF ROTATION ANGLE ARITHMETIC DEVICE, ROTATION ANGLE ARITHMETIC DEVICE, MOTOR CONTROL DEVICE, ELECTRIC ACTUATOR PRODUCT AND ELECTRIC POWER STEERING DEVICE
回転角度演算装置の補正方法、回転角度演算装置、モータ制御装置、電動アクチュエータ製品及び電動パワーステアリング装置
2021-12-13
Patent
Elektronische Ressource
Japanisch
IPC: | H02P CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS , Steuern oder Regeln von elektrischen Motoren, elektrischen Generatoren, dynamoelektrischen Umformern / B62D MOTOR VEHICLES , Motorfahrzeuge / G01B MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS , Messen der Länge, der Dicke oder ähnlicher linearer Abmessungen / G01D MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE , Anzeigen oder Aufzeichnen in Verbindung mit Messen allgemein |
Europäisches Patentamt | 2019
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