Sanyo Electric Co., Ltd.

Tatsuaki Tanaka

Toshihiro Suhara

Toshihiro Matsumoto

Yoshihiko Maeda

Hiroaki Sagara

Masaru Tanaka

Masakatsu Fujiwara

Kazuhiro Tomoshige

Ryohei Adachi

Hiroyasu Ishihara

Kazuhisa Matsumoto

Masahiro Shimazu

A hub unit for use in electrically assisted bicycles has an improved effect to radiate heat from a stator. A hub () has inner teeth () meshable with planetary gears () and a fixing support shaft () projecting from opposite ends of the hub and provided fixedly relative to a motor housing (). The motor housing () has no cylindrical wall () covering the outer peripheral surface of the stator () but leaves the stator outer peripheral surface exposed to effectively release the heat generated by the windings of the stator.

Hub unit for use in electrically movable wheels and vehicle comprising the hub unit

An electrically assisted vehicle includes a vehicle body having a driving wheel driven by human driving power and electric driving power, a driving power applying section for applying the human driving power to drive the driving wheel, a torque detection section to detect the human driving power applied to the driving power applying section, a motor to auxiliarily drive the driving wheel by the electric driving power, a battery to supply power for the motor, and a control section to control the motor according to a result detected by the torque detection section, wherein the control section has a plurality of switchable assist modes relating to an assist ratio of the electric driving power to the human driving power.

Electrically assisted vehicle

A vehicle having a man power driving system in which a driving force by man power is applied through a gear change mechanism to rotate a wheel, an a motor driving system in which the wheel is rotated by a driving force of a motor. The man power driving system is equipped with a torque detector for detecting a man power driving force so as to drive the motor according to a magnitude of the man power driving force detected by the turque detector. A particularly durable gear change mechanism is not required, and thus a common gear change mechanism for bicycle can be used, thereby simplifying construction.

Combination man-powered and motor-driven vehicle

A torque limiting device for motors in electrically driven vehicles includes a control device for controlling an electric driving power supplied to a motor in an electrically driven vehicle; a detecting section for detecting a driven state of the motor and outputting an output signal of the motor; and an upper electric driving power limit setting device in which a plurality of restricting values corresponding to the output signal from the detecting section are previously set, wherein the upper electric driving power limit setting device gives a command to the control device to restrict an upper limit of the driving power on the basis of one of the plurality of restricting values when the output signal is outputted, thereby limiting a torque of the motor.

Torque limiting device for motors in electically driven vehicles and

An electrically assisted vehicle includes a vehicle main body having a driving wheel, a human drive system having a driving force applying part to which a human driving force for driving the driving wheel is applied and a torque detecting part for detecting the human driving force applied to the driving force applying part, and an electric drive system having a motor, a control part for controlling the motor and a battery for power supply, wherein the motor has an electric driving force characteristic such that it outputs the electric driving force only at speeds lower than a predetermined speed, and the control part of the electric drive system controls the motor with a predetermined ratio on the basis of detection results from the torque detecting part of the human drive systems thereby executing power assistance control while maintaining the assist ratio to be less than a predetermined value without providing a speed sensor for carrying out control based on the speed.

A motorized bicycle includes an electric motor, a motor current detector, a pedaling force detector and a controller. The controller compares the range of fluctuation in a pedaling force detected by the pedaling force detector with a predetermined range value, and stops the driving of the electric motor if the fluctuation range of the pedaling force is kept smaller than the predetermined range value for more than a predetermined time period.

Motorized bicycle

An electrically powered bicycle that is driven by a main driving force generated by pedaling and an auxiliary driving force, including: a motor for generating the auxiliary driving force, a battery for supplying electric power to the motor, an acceleration sensor for detecting running acceleration of the electrically powered bicycle, and control device for controlling the electric power to be supplied to the motor so that the motor outputs the auxiliary driving force in accordance with the running acceleration thus detected.

Growing community of inventors

Kasai, Japan

Tatsuaki Tanaka