Drive device for electric vehicle

• Main Author: NAGAMORI TAKEO
• Format: Patent
• Language: English
• Published: 03.11.2015
• 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

A drive device for an electric vehicle includes: a parking lock mechanism that mechanically locks a rotation of a rotating shaft of drive wheels; a parking lock operating unit; an electric motor; a balancing torque estimating unit for applying rotational torque to the electric motor in the opposite direction of the direction of torsional torque applied to the rotating shaft, while locking via the parking lock mechanism is done, and for balancing torque in advance that balances out the torsional torque, based on a state of the rotational phase of the electric motor; and a torque applying unit for applying torque to the electric motor before the locking is released, the torque calculated based on the estimated balancing torque.