There is provided an inductive power line data coupler (10). The coupler (10) includes (a) a magnetic core (105) having a high magnetic permeability at a data communication frequency and being configured to allow a power line (100) to serve as a primary winding, (b) a data signaling circuit that provides a secondary winding (115) through the magnetic core (105) for coupling a data signal between the power line (100) and a communication device (130), and (c) a choke coil (135) coupled to the data signaling circuit for creating a flux-canceling power frequency current opposite in direction and comparable in magnitude to a power frequency current. The coupler (10) may also include a circuit for sensing a level of current in the power line (100).

High current inductive coupler and current transformer for power lines

A semiconductor light-emitting device has a semiconductor layer containing Al between a substrate and an active layer containing nitrogen, wherein Al and oxygen are removed from a growth chamber before growing said active layer and a concentration of oxygen incorporated into said active layer together with Al is set to a level such that said semiconductor light-emitting device can perform a continuous laser oscillation at room temperature.

Semiconductor light-emitting device, surface-emission laser diode, and production apparatus thereof, production method, optical module and optical telecommunication system

An electric power conversion apparatus includes a channel case in which a cooling water channel is formed; a double side cooling semiconductor module that has an upper and lower arms series circuit of an inverter circuit; a capacitor module; a direct current connector; and an alternate current connector. The semiconductor module includes first and second heat dissipation metals whose outer surfaces are heat dissipation surfaces, the upper and lower arms series circuit is disposed tightly between the first heat dissipation metal and the second heat dissipation metal, and the semiconductor module further includes a direct current positive terminal, a direct current negative terminal, and an alternate current terminal which protrude to outside. The channel case is provided with the cooling water channel which extends from a cooling water inlet to a cooling water outlet, and a first opening which opens into the cooling water channel.

Electric Power Conversion Apparatus

A power conversion device includes a power switching circuit that supplies AC voltages generated between switching elements operating as upper arms and switching elements operating as lower arms, and a control circuit that generates and supplies to the driver circuit signals for controlling the switching operation of the switching elements by a PWM method in a first operational region in which frequency of an AC power to be outputted is low, and that generates and supplies to the driver circuit signals for controlling the switching operation of the switching elements at timings based upon the phase of the AC power to be outputted in an operational region in which the frequency of the AC power to be outputted is higher than in the first operational region.

Power Conversion Device

Power converters such as power modules configured as inverters employ modularized approaches. In some aspects, semiconductor devices are thermally coupled directly to thermally conductive substrates without intervening dielectric or insulative structures. Additionally, or alternatively, semiconductor devices are thermally coupled to thermally conductive substrates with relatively large surface areas before heat transferred from the semiconductor devices encounters a dielectric or electrically insulating structure with correspondingly high thermal impedance.

Architecture for power modules such as power inverters

A semiconductor apparatus includes positive and negative side conductors for bridge-connecting semiconductor switches, constituted to a wide conductor, and laminated by sandwiching an insulator between them. A semiconductor apparatus includes positive and negative side conductors extended from its case, and an electrolytic capacitor connected to the extension portion of the positive and negative side conductors. A power converter uses the semiconductor apparatus.

Semiconductor apparatus, power converter and automobile

A positive side conductor and a negative side conductor of an input terminal electrically connected to semiconductor elements, are electrically insulated from each other, and are laminated with each other, and the input terminal having such a laminated structure, an output terminal and substrates mounted thereon the semiconductor elements are arranged in a checkered pattern in a container. Further, the semiconductor elements mounted on the substrates, the input terminal and the output terminal are electrically connected to one another so as to obtain a loop-like electric path on a conductive member, thereby it is possible to aim at miniaturizing the power conversion apparatus and lowering the inductance thereof.

Power conversion apparatus and mobile object incorporating thereof

PROBLEM TO BE SOLVED: To prevent troubles in high-frequency noise due to a common mode current, using a simple constitution SOLUTION: An output power line 4 of a power conversion system 2 and a common mode feed-back line 7 is turned on the same magnetic core to form a GP coil 3 Both ends of the common mode current feedback line 7 are connected to a ground line 8 on the power side of the power conversion system and a ground line 6 on the load side A common mode current is fed back on the side of the power conversion system 2 via the common mode current feedback line 7 Then, the impedance of the grounding circuit loop is made higher than that of the common mode current feedback loop The common mode current is made to flow for the most part to a feedback loop made of the common mode current feedback line With a simple constitution, troubles regarding high-frequency noises caused by the common mode current are suppressed through a canceling effect with the power line COPYRIGHT: (C)2001,JPO

Power conversion system

In an electric power conversion/inversion apparatus, including, such as an inverter therein, for obtaining reduction in circuit inductance and wiring resistance therein by bringing small as a whole, having good installability and high reliability and efficiency of electric power conversion, as well, semiconductor chips 1 are disposed, being put between a positive input bus bar 14 p and a negative input bus bar 14 n and plural output bus bars 18 at crossing positions thereof, and are connected electrically and thermally, to the positive input bus bar 14 p in a pole direction consistent therewith while to the negative input bus bar 14 n in a pole direction consistent therewith, and further to the common output bus bars 18 in pole directions being different from side by side.

Electric power conversion/inversion apparatus

A semiconductor power conversion device includes two bridge-connected semiconductor switches, an output terminal, and first and second pairs of positive and negative direct current terminals. First conductors connect the negative direct current terminals of the first and second pairs with the output terminal through one of the two bridge-connected semiconductor switches, while second conductors connect the positive direct current terminals of the first and second pairs with the other of the two bridge-connected semiconductor switches. A housing is provided, which includes the two bridge-connected semiconductor switches, and at least a portion of the first conductor and of the second conductor as a multilayer structure formed by sandwiching an insulator between the first and second conductors inside the housing. The first and second pairs of direct current terminals are arranged on one side of one plane of the housing.

Akira Mishima

Papers

Semiconductor apparatus, power converter and automobile

Power conversion apparatus and mobile object incorporating thereof

Power conversion system

Electric power conversion/inversion apparatus

Semiconductor device and electric power conversion device