Mitsubishi Denki Kabushiki Kaisha

Panasonic Corporation

Mitsubishi Electric Corporation

Konica Minolta, Inc.

Shinya Noguchi

Seiichi Tanaka

Masaru Shimomura

Toshiyuki Fujii

Tamotsu Senda

Ryosuke Tani

Ryoji Miyatake

Akiko Tabuchi

Takahiko Shiraishi

Tatsushi Chihara

Ryota Onishi

A cradle apparatus configured to detachably support an ultrasound diagnostic apparatus, the cradle apparatus including: a base portion configured to support a bottom portion of the ultrasound diagnostic apparatus; a back supporting portion extending from the base portion along an attaching/detaching direction of the ultrasound diagnostic apparatus, the back supporting portion being configured to support a back portion of the ultrasound diagnostic apparatus on a side opposite to a front portion of the ultrasound diagnostic apparatus, the front portion being provided with a display device; and a guide disposed in the back supporting portion and configured to be fitted with a rail provided in the back portion of the ultrasound diagnostic apparatus so as to allow the ultrasound diagnostic apparatus to slide along the attaching/detaching direction.

Cradle apparatus

A power generation system is provided in which, when a static frequency converter (SFC) is connected to synchronous generator's armature windings, an AC exciter performs AC excitation by allowing a d-axis winding and a q-axis winding of the AC exciter to configure d-q orthogonal axes; and, at the time of steady-state operation of the synchronous generator, an alternating current(s) supplied from an electric power source is rectified by a thyristor excitation device, and also the AC exciter thereby performs DC excitation by connecting the d-axis winding and the q-axis winding in series with each other.

Power generation system

Probe for ultrasonic diagnosis apparatus

An excitation controller controls excitation of a synchronous machine, which is connected to a power transmission system through a transformer, so that a high-side voltage of the transformer is maintained at a target voltage with high accuracy. An output terminal target voltage of the synchronous machine is set to precisely compensate for a voltage drop in the transformer, corresponding to the transformer phase angle variation. To achieve this result, the excitation controller detects an output terminal voltage and an output current of the synchronous machine and calculates active and reactive currents of the output current, sets the output terminal target voltage of the synchronous machine from the active and reactive currents, the high-side voltage of the transformer, and the reactance of the transformer, and controls excitation of the synchronous machine to compensate for the voltage drop in the transformer corresponding to phase angle variation of the transformer.

Excitation controller

An excitation controller for a synchronous machine includes a voltage detector for detecting an output terminal voltage of the synchronous machine connected to a transmission system through a transformer; a current detector for detecting a current outputted by the synchronous machine; a module type high side voltage control apparatus for operating arithmetically on a reactive current value on the basis of output from the voltage detector and the current detector, operating arithmetically on a high side voltage value from the reactive current value thus arithmetically operated on and a reactance of the transformer, and outputting a correction signal based on a deviation between the high side voltage value thus arithmetically operated on and a voltage setting value; an automatic voltage regulator, having a voltage setter, for outputting a command which is obtained by adding the correction signal to a voltage setting value provided by the voltage setter; and an exciter for carrying out field control of the synchronous machine on the basis of a command issued from the automatic voltage regulator.

Excitation controller for synchronous machine

Growing community of inventors

Tokyo, Japan

Shinya Noguchi