MOTOR TORQUE CONTROL DEVICE

• Main Authors: MATSUMI TOSHIYUKI, HATSUMI NORIHIKO, MIYAMOTO HIROAKI, SUGIMOTO TAKANORI, HASHIZAKA AKIRA, SANO YOSHIAKI, HATSUDA YASUYUKI
• Format: Patent
• Language: English
• Published: 05.09.2013
• Subjects: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION; ELECTRIC EQUIPMENT OR PROPULSION OF ELECTRICALLY-PROPELLEDVEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES, IN GENERAL; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; PERFORMING OPERATIONS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TRANSPORTING; VEHICLES IN GENERAL

PROBLEM TO BE SOLVED: To provide a motor torque control device capable of achieving a motor output (torque) limit for obtaining proper operation performance in accordance with a traveling condition.SOLUTION: A motor limit torque mtr1 which is an upper limit value of a command torque for a motor is varied according to a vehicle speed and a brake hydraulic pressure (depression amount on a brake pedal). The motor limit torque is reduced as the brake hydraulic pressure becomes higher. When the brake hydraulic pressure b is equal to a predetermined value or higher, the motor limit torque becomes negative or zero. The value of negative of the motor limit torque becomes larger as the brake hydraulic pressure becomes larger. The maximum value on negative side of the motor limit torque becomes larger as the vehicle speed becomes larger.