Kabushiki Kaisha Toshiba

Kazuhisa Matsuge

Kazunobu Nagai

Naoto Shinohara

Takaya Kitahara

In one embodiment, system for driving an electromagnetic appliance includes an electromagnetic appliance, a main-drive unit and a sub-drive unit. The electromagnetic appliance includes coils for n number of phases, the coils for each of the n phases being arranged in a pair and wound so as to be excited in a predetermined direction by being energized with opposite-phase currents. The main drive unit is connected to each of the coils and energizes the paired coils with opposite-phase currents. The sub-drive unit is provided parallel with the main-drive unit and is configured to suppress a short-circuit current occurring at the main-drive unit when switching energization of the coils.

System for driving electromagnetic appliance and motor driven vehicle

There is disclosed a linearizer in which a main signal inputted to a main amplifier is orthogonally modulated by an orthogonal modulator to allow an upper side band signal or a lower side band signal to appear, the signal is used to perform a distortion compensation control, and a constitution of a side band signal detector is thereby simplified. When a phase of a base band signal from a modulated signal generator is reversed in time division, an appearance position of the side band signal is changed to a lower side from an upper side, or to an upper side from a lower side. Moreover, when the phase of the base band signal is changed at high speed, an amplification property is controlled at high speed.

Feedforward type linearizer

The present invention provides a detector comprising a microstrip line having one end being grounded and another end connected to a main transmission line, a detection diode connected to the microstrip line, and a smoothing circuit for smoothing a signal detected by the detection diode.

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Shinagawa, Japan

Kazuhisa Matsuge