Mitsubishi Denki Kabushiki Kaisha

Iwasaki Electric Co., Ltd.

Dainippon Plastics Co., Ltd.

Japan Atomic Energy Research Institute

Yasuo Yoshida

Hirofumi Kinugasa

Yoshihito Hirano

Toshiyuki Ando

Hitoshi Nakayama

Yoshio Kishima

Teruo Iwanaga

Tadashi Sakurai

Tatsuya Matsukawa

Hiroshi Jimbo

Tadashi Kakinuma

Takatoshi Egami

Ryuichi Shimada

Yoshio Kashima

A wind power generation system capable of outputting generated power at high efficiency with a smoothed output power includes a wind power generator and a laser aerovane mounted on the wind power generator or located near the wind power generator. Direction and velocity of wind blowing toward the wind power generator are observed using the laser aerovane, and a yaw angle and/or a pitch angle of the wind power generator is predicted and controlled based on the observation results. Thus, high-efficiency control of the wind power generation system, including the wind power generator, is achieved. An output-smoothing device connected to the wind power generator predicts and controls electric power input/output of the output-smoothing device based on a predicted power output of the wind power generator and smoothes the power output of the wind power generation system.

Wind power generation system

An electric power supply apparatus used to supply electric power to a varying load by using a flywheel generator. A first electric power converter has an input terminal end connected to the flywheel generator. An electric power converter circuit is composed of a second electric power converter having input terminal end connected to a utility line and a low inductance coil connected in series with the second electric power converter. The first electric power converter and the electric power converter circuit are connected in parallel to the load so as to constitute a thyristor driving device in respect to the flywheel generator.

Electric power supply apparatus

Prior to weathering test for samples, of example, plastic, fiber, or paint, the samples are exposed to ultraviolet ray radiation emitted from high pressure metal halide vapor discharge lamp at an energy level capable of deteriorating the samples in a short time, while maintaining the samples at a temperature which can not be a cause of the deterioration. According to the deterioration level, samples to be subjected to the weathering evaluation test are selected.

Apparatus for accelerated weather-testing of a sample using a metal

Weather resistance tester

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Tokyo, Japan

Yasuo Yoshida