Matsushita Electric Works, Ltd.

Crystal Corporation

Nobuteru Maekawa

Hiroaki Okada

Shinya Murase

Hiroyuki Inoue

Teruaki Komatsu

Junji Imai

Masayuki Sagawa

Michimasa Tsuzaki

Narimasa Iwamoto

Yuri Sakai

Yoshinori Sainomoto

Hiroyuki Tagishi

Kazuhisa Aoki

Katsuyoshi Shimoda

Belov Iouri Maksimovich

A thermoelectric module is capable of successfully reducing the heat stress for increased reliability. The module includes a plurality of thermoelectric chips of P-type and N-type arranged in a matrix between sets of first and second contacts to form a series electrical circuit. The chips are arranged to give at least three chip arrays each having a limited number of the chips. A first carrier is provided on one side of the chips to carry the first contacts and to include first bridges each integrally joining two adjacent first contacts to define first discrete couples for electrical connection of the chips in each chip array. The first carrier further includes at least two inter-array bridges which are solely responsible for electrical interconnection between the adjacent chip arrays. On the opposite side of the chips, there are formed a plurality of second bridges each integrally joining the two adjacent second contacts to give second discrete couples for electrical connection of the two adjacent chips in each of the chip arrays. Thus, the inter-array bridges are formed only on one side of the chips for interconnection of the first contacts between the adjacent chip arrays. Therefore, the heat stress applied to the end of the chip array where the two adjacent chip arrays are interconnected can be well relieved on the side of the second contacts in which the second discrete couples are kept totally isolated from each other.

Thermoelectric module with interarray bridges

Thermoelectric module and a method of fabricating the same

Ingot plate made of thermoelectric material, rectangular bar cut from

Peltier module

A leakage detecting device for electrical appliance is provided with electrodes (17) for detecting a state in which an electrical appliance such as a hair dryer is submerged in water. When the electrodes (17) are in a short-circuited state, relay means (3) is driven to open a contact (7). As a result, supply of the power supply voltage from a commercial power source (1) to the loads such as a motor (15), a heater (16) and the like is stopped so that an accident due to leakage can be prevented in such cases as a case in which the electrical appliance has been dropped into the water.

Leakage detecting device for electrical appliance

A power control system for electrical apparatus, in which a unidirectional rectifying device is connected to one of a plurality of loads connected mutually in parallel, an ignition circuit comprising a plurality of resistors is connected between the loads and a switching element whose conduction phase is controllable, and at least one of the resistors in the ignition circuit is connected through the unidirectional rectifying device to the said load, whereby the power supply to each of the plurality of loads can be controlled in an individual manner by means of the single switching element.

Power control system for electrical apparatus

A rotor for coreless motor comprises a cylindrical coil of a wire wound as repetitively folded back to alternately change current flowing direction with respect to magnetic field of associated stator of the motor and inner conductor of the wire is exposed at a plurality of portions equally spaced in the folded back parts forming an axial endwise edge of the cylindrical shape of the coil. The conductor exposing portions corresponds in number to stator poles and thus commutator segments, the latter of which are disposed adjacent and around an end of rotor shaft and connected respectively at a radially extended end substantially directly to the coil's conductor at each of its exposed portions.

Rotor for coreless motor

Growing community of inventors

Katano, Japan

Nobuteru Maekawa