Motor drive control device
AssigneesMicrospace Corporation, Taiyo Yuden Co., Ltd.
InventorsMasato Tanaka, Kazuo Asanuma, Yasuo Hosaka, Hirokazu Shirakawa
Life of this patent
Estimating the term…
Abstract
A motor drive control device of an electric power-assisted vehicle that has a gear shifter and a motor, and in which a first ratio of the number of drive rotations in the motor to the number of drive rotations of a pedal changes based on changes in a gear ratio in the gear shifter, includes: a gear ratio obtaining part that obtains the gear ratio of the gear shifter; and a calculating part that calculates an assist torque, which is a target value for a drive torque of the motor, from the pedal input torque based on the gear ratio obtained by the gear ratio obtaining part.
Claims17
A motor drive control device of an electric power-assisted vehicle having a gear shifter and a motor in which a first ratio of a number of drive rotations in the motor to a number of rotations of a pedal changes according to changes in a gear ratio of the gear shifter, the device comprising:
- a gear ratio obtaining part that obtains a gear ratio of the gear shifter;
- and
- a calculating part that calculates an assist torque, which is a target value for a drive torque of the motor, from a pedal input torque, based on the gear ratio obtained from the gear ratio obtaining part.
A motor drive control device of an electric power-assisted vehicle having a gear shifter and a motor in which a first ratio of a number of drive rotations in the motor to a number of rotations of a pedal changes according to changes in a gear ratio of the gear shifter, the device comprising:
- a controller that assumes a gear ratio lower than mid speed when conditions including that a prescribed amount of time has not passed since a pedal input torque has started increasing from 0 or a small value are satisfied, and assumes that a gear ratio is equal to or greater than mid speed when said conditions are no longer satisfied;
- and
- a calculating part that calculates an assist torque, which is a target value for a drive torque of the motor from the pedal input torque, based on the assumed gear ratio.
Dependencies are inferred from the claim text.