Mitsubishi Denki Kabushiki Kaisha

Mitsubishi Electric Corporation

Fujikoki Corporation

General Research of Electronics, Inc.

Masaki Hiratsuka

Hiroki Ito

Tatsuya Yoshida

Kazuyoshi Imazeki

Kenji Kamei

Nobuaki Yokoyama

Makoto Miyashita

Kazuyori Tahata

Sho Tokoyoda

Haruhiko Kohyama

Kunio Kikuchi

Toshinobu Takeda

Yusaku Horinouchi

In an electrically operated valve including a valve main body having a valve chamber communicating with an inflow passage for refrigerant and an outflow passage for refrigerant, a valve body moving forward and backward for a valve seat formed within the valve chamber and changing a refrigerant flow rate, an electric motor driving the valve body, a board controlling the electric motor, and a board storage portion including a case storing the board, the board has a fixing hole fixing the board within the case, the case has a support projection fixed into the fixing hole and supporting the board within the case, and the support projection is integrally formed with the case portion. The support projection is preferably provided with a step portion and the board is preferably held by the step portion and a pressing projection disposed in a back surface of a lid occluding the case.

Electrically operated valve

A direct-current circuit breaker includes a switching unit inserted in the direct-current line; and a commutation circuit that includes a series circuit including a first current-limiting element and an interrupting unit that forms a current zero point by superimposing a resonance current on a direct current flowing in the direct-current line and interrupts the direct current at the current zero point, that is connected in parallel with the switching unit, and that becomes a flow path for the direct current after the switching unit is opened, wherein current interruption is performed by the interrupting unit after the switching unit is opened.

Direct-current circuit breaker

An each area automatic selection receiver of an emergency radio signal is an emergency broadcast receiver which enables current area code CAC to be updated automatically. This receiver is constituted in such a way that a GPS receiver obtains current position information by use of the satellite positioning system, then, a converter converts the current position information into an area code by use of a conversion table to write the area code into a code memory. For that reason, even though the receiver moves anywhere, contents of the code memory are always updated to an area code of an area of the movement destination automatically. Therefore, emergency broadcast of the area is always capable of being received correctly.

Each area automatic selection receiver for emergency radio signal

A phase control switch apparatus incorporating a phase-based break/make controller ( A, B, C) for protecting a reactive load such as a transformer ( ) from transient surge phenomena taking place upon power-supply breaking/making operation. The phase control switch apparatus includes a reference phase detecting unit ( ) for predicting phases of the phase-voltage and phases-current waveforms upon closing and opening of the breaker contacts, a residual magnetic flux detecting unit ( ) for predicting residual fluxes in each phase of the transformer ( ) on the basis of time points at which the breaker contacts of the individual phases were opened in the preceding breaking operation and polarities of the phase-currents immediately before the breakage, an operation control unit ( ) for predicting optimal closing time points for the individual phases at which the transient surge can be suppressed to a minimum on the basis of the predicted residual fluxes

Phase control switch apparatus

Growing community of inventors

Tokyo, Japan

Masaki Hiratsuka