To provide a rotation angle detection device, motor control device, electric power steering device and rotation angle detection method that can maintain high detection accuracy.SOLUTION: On the basis of a maximum value or a minimum value of a first sinusoidal signal serving a differential between a positive phase sinusoidal signal and a reversed phase sinusoidal signal, a second sinusoidal signal is obtained that has a gain of the first sinusoidal signal corrected. On the basis of a maximum value or a minimum value of a first cosine wave signal serving a differential between a positive phase cosine wave signal and a reversed phase cosine wave, a second cosine wave signal is obtained that has a gain of the first cosine wave signal corrected. On he basis of a maximum value or a minimum value of a third sinusoidal signal adding the second cosine wave signal and the second sinusoidal signal, a fourth sinusoidal signal is obtained that has a gain of the third sinusoidal signal corrected. On the basis of a maximum value or a minimum value of a third cosine wave signal subtracting the second sinusoidal signal from the second cosine wave signal, a fourth cosine wave signal is obtained that has a gain of the third cosine wave signal corrected. On the basis of the fourth sinusoidal signal and the fourth cosine wave signal, a rotation angle of a motor is calculated.SELECTED DRAWING: Figure 7
【課題】高い検出精度を維持することができる回転角検出装置、モータ制御装置、電動パワーステアリング装置、及び回転角検出方法を提供すること。【解決手段】正相正弦波信号と逆相正弦波信号との差分である第1正弦波信号の最大値又は最小値に基づき、第1正弦波信号のゲインを補正して第2正弦波信号とする。正相余弦波信号と逆相余弦波信号との差分である第1余弦波信号の最大値又は最小値に基づき、第1余弦波信号のゲインを補正して第2余弦波信号とする。第2余弦波信号と第2正弦波信号とを加算した第3正弦波信号の最大値又は最小値に基づき、第3正弦波信号のゲインを補正して第4正弦波信号とする。第2余弦波信号から第2正弦波信号を減算した第3余弦波信号の最大値又は最小値に基づき、第3余弦波信号のゲインを補正して第4余弦波信号とする。第4正弦波信号及び第4余弦波信号に基づき、モータの回転角を算出する。【選択図】図7
ROTATION ANGLE DETECTION DEVICE, MOTOR CONTROL DEVICE, ELECTRIC POWER STEERING DEVICE, AND ROTATION ANGLE DETECTION METHOD
回転角検出装置、モータ制御装置、電動パワーステアリング装置、及び回転角検出方法
2019-07-25
Patent
Electronic Resource
Japanese
IPC: | G01D MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE , Anzeigen oder Aufzeichnen in Verbindung mit Messen allgemein / B62D MOTOR VEHICLES , Motorfahrzeuge / H02P CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS , Steuern oder Regeln von elektrischen Motoren, elektrischen Generatoren, dynamoelektrischen Umformern |
ROTATION DETECTION DEVICE, ROTATION ANGLE DETECTION DEVICE, AND ELECTRIC POWER STEERING DEVICE
European Patent Office | 2016
|European Patent Office | 2019
|European Patent Office | 2022
|European Patent Office | 2022
|ROTATION ANGLE DETECTION DEVICE AND ELECTRIC POWER STEERING DEVICE
European Patent Office | 2024
|