Kokusan Denki Co., Ltd.

Nozomu Katsumata

Shuichi Muramatsu

Masaki Asari

Hirofumi Yamaguchi

Shinji Komatsu

Tomoya Tamakawa

Akinari Ueki

Ryosuke Tonooka

A battery charging device provided with: a bridge-type controlled rectifier circuit having three-phase thyristors for rectifying the output of a three-phase AC generator and supplying a charging current to a battery; and a controller for controlling the supplying of a trigger signal to the thyristors in accordance with the terminal voltage of the battery; the controller being configured so that the trigger signal is supplied to the thyristors simultaneously when it is detected that the terminal voltage of the battery is equal to or lower than a set voltage, and supplying of the trigger signal is stopped when a certain period has elapsed after the terminal voltage exceeds the set voltage, in order to prevent commutation failure of the thyristors when charging of the battery is stopped, and prevent overcharging of the battery.

Battery charging device

A power source device for rectifying the output of an AC generator in which magneto coils are in a star-shaped connection in three phases. The device includes a control rectifier circuit configured from a first control rectifier circuit for performing full-wave rectification on three-phase AC voltages, and a second control rectifier circuit for performing full-wave rectification on AC voltages obtained between neutral and each of two-phase AC output terminals selected from the three-phase AC output terminals of the generator, as well as on AC voltage obtained between the selected two-phase AC output terminals; and a controller controlling the first and second circuits so that the output of the first circuit is supplied to the load when the rotational speed of the generator is equal/less than a set speed, and the output of the second circuit is supplied to the load when the rotational speed exceeds the set speed.

Power source device

Growing community of inventors

Gotemba, Japan

Nozomu Katsumata