Nec Corporation

Fuji Electric Co., Ltd.

Tetsuya Mochizuki

Kenji Kobayashi

Yoshihide Miyazawa

Akio Kuruma

Shinichi Narasaki

Yoshishige Okuhara

Toshio Hatakeyama

A power supply system includes a plurality of power supply devices which are mounted in a mount region and a control [means] unit (namely, a central processing unit), The control [means] unit is connected to the power supply devices and sets a power supply quantity to be supplied to an external load apparatus. [Herein,] The power supply devices are assigned connection positions as addresses in the mount region[, respectively]. Further, the power supply devices send the connection positions as connection position signals into the control [means] unit. The control means determines the number of the power supply devices based upon the connection position signals and sets the power supply quantity based upon the number.

Power supply system

An auto-transformer has first and second input terminals and first, second and third output terminals, the second output terminal being connected to a center tap of a coil and the first and third output terminals being connected to such points of the coil which are symmetrical with respect to the center tap. The first and second input terminals are connected to such points of the coil which are symmetrical with respect to the center tap. A first group of loads is coupled across the first and second output terminals and a second group of loads is coupled across the second and third output terminals. By equalizing the load currents to the first and second groups, the total current of the auto-transformer can be made significantly small.

Power supply circuit with symmetrically tapped auto-transformer

Growing community of inventors

Yamanashi, Japan

Tetsuya Mochizuki