To improve precision of a position at which a wiper reverses in response to occurrence of disturbance.SOLUTION: A motor unit comprises: a rotary shaft that positively and inversely rotates between two reversing positions; a rotary shaft sensor 65 that outputs an analog signal according to a rotation angle of the rotary shaft; a rotation angle calculating part 71 that calculates the rotation angle of the rotary shaft from the analog signal; a rotation direction calculating part 72 that calculates the rotation direction of the rotary shaft from the analog signal; a vector length calculating part 73 that calculates a vector length of the analog signal; a memorizing part 74 preliminarily memorizing an actual rotation angle of the rotary shaft measured by an external device and an ideal vector length that is a vector length in a state where there is no disturbance; a vector length error calculating part 75 that calculates a vector length error that is an error between the vector length and the ideal vector length, when the rotation angle of the rotary shaft is an angle corresponding to a prescribed position closer to a front side than the reversing positions; and a reversing position changing part 76 that changes the reversing positions, when the vector length error is out of a range of thresholds.SELECTED DRAWING: Figure 8
【課題】外乱の発生に対応しワイパの反転位置の精度の向上を図る。【解決手段】2つの反転位置の間で正逆回転する回転軸と、回転軸の回転角度に応じてアナログ信号を出力する回転軸センサ65と、上記のアナログ信号から回転軸の回転角度を算出する回転角度算出部71と、上記のアナログ信号から回転軸の回転方向を算出する回転方向算出部72と、上記のアナログ信号のベクトル長を算出するベクトル長算出部73と、外部装置により測定された回転軸の実際の回転角度と、外乱の無い状態におけるベクトル長である理想ベクトル長とを予め記憶した記憶部74と、回転軸の回転角度が反転位置よりも手前の規定位置に対応する角度のときの、ベクトル長と理想ベクトル長との誤差であるベクトル長誤差を算出するベクトル長誤差算出部75と、ベクトル長誤差が閾値の範囲外である場合、反転位置を変更する反転位置変更部76と、を備える。【選択図】図8
MOTOR UNIT AND MOTOR CONTROL METHOD
モータユニットおよびモータ制御方法
27.07.2023
Patent
Elektronische Ressource
Japanisch
IPC: | G01D MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE , Anzeigen oder Aufzeichnen in Verbindung mit Messen allgemein / B60S SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR , Warten, Reinigen, Instandsetzen, Unterstützen, Anheben oder Rangieren von Fahrzeugen, soweit nicht anderweitig vorgesehen / H02P CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS , Steuern oder Regeln von elektrischen Motoren, elektrischen Generatoren, dynamoelektrischen Umformern |
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