Yamaha Hatsudoki Kabushiki Kaisha

Fuminao Obayashi

Hiroshi Tanaka

Hideki Shirazawa

Tsukasa Shimizu

Kazuto Nakamura

An electric motorcycle includes a vehicle controller that outputs an instruction value based on an operation amount of at least an accelerator grip, and a motor driving unit that supplies a driving electric power in accordance with the instruction value to an electric motor. The vehicle controller is disposed outside a case that includes the motor driving unit disposed therein. The distance from the steering handle to the vehicle controller is shorter than the distance from the steering handle to the motor driving unit in a side view of the vehicle body, to simplify the cost of the electric wire and the work required to lay out the electric wire.

Straddle-type electric vehicle

An electrically assisted vehicle includes a vehicle body, pedals to input human power, a crank that is coupled to the pedals and freely rotatably supported on the vehicle body, a wheel (i.e., at least one wheel) that is attached to the vehicle body and rotates according to a rotation of the crank, a first electric motor that is attached to the vehicle body and drives the wheel, a second electric motor that is attached to the vehicle body and drives the wheel or another wheel, a torque detection unit that detects a torque applied to the crank, a torque command value calculation unit, and a motor drive unit that drives the first electric motor and second electric motor according to a calculated torque command value. The torque command value calculation unit calculates a first torque command value for the first electric motor and a second torque command value for the second electric motor according to a torque detected by the torque detection unit, and calculates the first and second torque command values such that the first and second torque command values are mutually shifted in phase.

Electrically assisted vehicle

A vehicle includes a wheel, an electric motor that drives the wheel, a drive torque operator that is operated by an operator, a slip detection unit that detects a slipping state of the wheel, a torque command value calculation unit that calculates a torque command value for the electric motor, and a motor drive unit that drives the electric motor according to a calculated torque command value. When the slip detection unit has not detected a slipping state of the wheel, the torque command value calculation unit calculates a torque command value for the electric motor according to an input to the drive torque operator. When the slip detection unit has detected a slipping state of the wheel, the torque command value calculation unit calculates a torque command value that repeatedly fluctuates alternately between a first value not more than a torque command value at the time when wheel slip has been detected and a second value smaller than the first value.

Growing community of inventors

Shizuoka, Japan

Fuminao Obayashi