VEHICULAR BRAKE CONTROL DEVICE
PROBLEM TO BE SOLVED: To provide a vehicular brake control device which is applied for a brake control device using a brushless motor, and can effectively suppress excessive wheel slip when starting wheel slip suppression control.SOLUTION: A brake control device presses a friction member on a rotary...
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Zusammenfassung: | PROBLEM TO BE SOLVED: To provide a vehicular brake control device which is applied for a brake control device using a brushless motor, and can effectively suppress excessive wheel slip when starting wheel slip suppression control.SOLUTION: A brake control device presses a friction member on a rotary member fixed to a wheel with an electric motor, thereby generating braking force. The brake control device is equipped with a wheel speed sensor for detecting wheel speed, a rotary angle sensor for detecting a rotary angle of the electric motor, a drive circuit for driving the electric motor, and a controller for controlling the drive circuit. The controller sets a current limit circle on dq-axis current characteristics of the electric motor on the basis of the specification of the drive circuit, calculates voltage limit circle on the dq-axis current characteristics on the basis of the rotation angle, executes slip suppression control decreasing a slip degree of the wheel on the basis of the wheel speed, calculates d-axis and q-axis target currents on the basis of an intersection of the current limit circle and the voltage limit circle at the execution start of the slip suppression control, and controls the drive circuit on the basis of the d-axis, and q-axis target currents.SELECTED DRAWING: Figure 6
【課題】 ブラシレスモータを用いた制動制御装置に適用され、車輪スリップ抑制制御の開始時に、効果的に、過大な車輪スリップが抑制され得るものを提供する。【解決手段】 制動制御装置は、車輪に固定される回転部材に摩擦部材を電気モータによって押圧して制動力を発生する。制動制御装置は、車輪速度を検出する車輪速度センサと、電気モータの回転角を検出する回転角センサと、電気モータを駆動する駆動回路と、駆動回路を制御するコントローラと、を備える。コントローラは、駆動回路の諸元に基づいて電気モータのdq軸電流特性における電流制限円を設定し、回転角に基づいてdq軸電流特性における電圧制限円を演算し、車輪速度に基づいて車輪のスリップ度合を減少するスリップ抑制制御を実行し、スリップ抑制制御の実行開始時に、電流制限円と電圧制限円との交点に基づいてd軸、q軸目標電流を演算し、d軸、q軸目標電流に基づいて駆動回路を制御する。【選択図】 図6 |
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