ROTATION ANGLE DETECTION DEVICE

• Main Authors: TANAKA YASUHISA, YOSHIKUWA YOSHIO, NISHIZAWA KOJI
• Format: Patent
• Language: English; Japanese
• Published: 29.09.2023
• Subjects: ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVEREDIN A SINGLE OTHER SUBCLASS; MEASURING; MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR; PHYSICS; TARIFF METERING APPARATUS; TESTING

To provide a rotation angle detection device capable of suppressing deterioration of the angle detection accuracy even when there is a difference in the amplitude of output signals of a magnetic detection element depending on arrangement angles of a plurality of magnetic detection elements.SOLUTION: In a rotation angle detection device, when a half angle of an angle between ends of a yoke is A ° in an electrical angle, a round-up value after a decimal point of a value obtained by dividing A°by 90°is M, the upper limit gain is Gmax, the lower limit gain is Gmin, and M is an odd number, Gmax/Gmin>-0.0031×A + 0.28×M + 1.07 is established, and when M is an even number, Gmax/Gmin>0.0031×A -0.28 × M + 1.35 is established.SELECTED DRAWING: Figure 3 【課題】複数の磁気検出素子の配置角度に依存して磁気検出素子の出力信号の振幅に差異が生じる場合であっても、角度検出精度の悪化を抑制できる回転角度検出装置を提供する。【解決手段】ヨークの端部間角度の半分角度を電気角でＡ°とし、Ａ°を９０°で除算した値の小数点以下の切り上げ値をＭとし、上限ゲインをＧｍａｘとし、下限ゲインをＧｍｉｎとし、Ｍが奇数の場合は、Ｇｍａｘ／Ｇｍｉｎ＞－0.0031×Ａ＋0.28×Ｍ＋1.07が成り立ち、Ｍが偶数の場合は、Ｇｍａｘ／Ｇｍｉｎ＞0.0031×Ａ－0.28×Ｍ＋1.35が成り立つ回転角度検出装置。【選択図】図３