Hitachi Automotive Systems, Ltd.

Masashi Kosuga

Hideyo Suzuki

Nobuaki Gorai

Takeshi Kato

Takeshi Tajiri

Hidehiko Takahara

Youhei Nishizawa

A bus bar and a detection element uses resin to mold and integrate, leading to a disadvantage of complicating manufacturing. The bus bar is sandwiched and fixed between a second mold member and a first mold member. A sensor substrate on which a detection element is mounted is installed above the second mold member. The detection element is fixedly disposed at a position facing the bus bar, and detects a current flowing through the bus bar.

Current detection apparatus

A power conversion device of the present invention includes a power conversion circuit configured to convert power; a conductor configured to transmit a current to the power conversion circuit; and a coreless current sensor configured to detect the current, in which the coreless current sensor includes: a magnetic field detection portion configured to detect a magnetic field of the current; and a shield portion that faces the magnetic field detection portion, the conductor includes: a first conductor portion that passes through a space between the magnetic field detection portion and the shield portion; and a second conductor portion connected to the first conductor portion via a first bent portion, and the first bent portion is formed such that the space between the magnetic field detection portion and the shield portion is not disposed in a direction perpendicular to a face of the second conductor portion closest to the shield portion.

Power conversion device

Insulating properties between a metallic member supporting a power semiconductor module and an input/output terminal of the power semiconductor module are secured. In a power conversion device in which a bus bar of a connecting member is connected to an input/output terminal and the like of a semiconductor module protruding through an opening of a metallic member, the connecting member includes extended portions which extend in a space between the bus bar and the opening of the metallic member.

In a power conversion device according to the present invention, a capacitor module, includes a first capacitor element; a second capacitor element; a positive pole-side bus bar; and a negative pole-side bus bar disposed in a laminated state, in which the positive pole-side bus bar and the negative pole-side bus bar are laminated via an insulating member. The first capacitor element includes a first body portion, a first positive pole-side electrode, and a first negative pole-side electrode. The second capacitor element includes a second body portion, a second positive pole-side electrode, and a second negative pole-side electrode. The first capacitor element is disposed so that the first positive pole-side electrode assumes a position closer to the second negative pole-side electrode than to the second positive pole-side electrode and faces the second negative pole-side electrode; and a laminate portion formed with the positive pole-side bus bar and the negative pole-side bus bar continues up to a point over a space where the first positive pole-side electrode and the second negative pole-side electrode face each other.

Capacitor module and power conversion device

An object of the present invention is to reduce the size of a power conversion apparatus and to improve the reliability. The power conversion apparatus includes a power semiconductor module, a driver circuit board mounted with a driver circuit, an AC-side relay conductor for transferring the alternating current, and an AC connector. The power semiconductor module includes an AC-side terminal connected to the AC-side relay conductor, and a control-side terminal connected to the driver circuit board. The AC connector is provided on the opposite side of the power semiconductor module through the driver circuit board. The driver circuit board includes a transformer for transforming voltage from low to high and supplying the transformed voltage to the driver circuit, and a line for connecting the transformer and the driver circuit. Further, the driver circuit board forms a through hold provided on the side opposite to the transformer with the driver circuit interposed therebetween. The AC-side relay conductor is connected to the AC-side connector, through the through hole.

Power conversion apparatus

An electric circuit apparatus capable of enhancing connection workability is provided. An electric circuit apparatus includes: a connector that transmits one or a driving current and a signal to an electric circuit unit; a substrate connected to the connector; a first case member forming an housing space for the substrate and forming an opening portion; and an intermediate member interposed between the connector and the first case member, in which the intermediate member includes a connector-side opening portion through which the connector passes, a seal surface with the connector, and a fix in portion to be fixed on the first case member, and the fixing portion is formed so as to absorb a positional tolerance between the connector and the opening portion of the first case member.

Electric circuit apparatus

An object of the present invention is to improve the cooling performance of a capacitor module used in a power conversion apparatus. The power conversion apparatus according to the present invention includes a power semiconductor module, a capacitor module, a flow path forming body that forms a flow path through which a cooling refrigerant flows. The flow path forming body includes a first flow path forming body that forms a first flow path part for cooling the power semiconductor module, and a second flow path forming body that forms a second flow path part for cooling the capacitor module. The first flow path forming body is provided on a side portion of the second follow path forming body and is integrally formed with the second flow path forming body. The second flow path forming body forms a housing space for housing the capacitor module above the second flow path part. The first flow path part is formed at a position facing the side wall that forms the housing space. The power semiconductor module is inserted into the first flow path part.

A power converter is provided to improve connection reliability of internal components of the power converter. The power converter may include a power semiconductor module that converts DC current into AC current, a casing that forms a housing space for housing the power semiconductor module, an AC relay bus bar that is connected to an AC terminal of the power semiconductor module by weld connection, and an AC terminal block that is connected to an AC terminal of a motor. The AC relay bus bar may be supported by the casing through an insulating member, and the AC terminal block may be connected to the AC relay bus bar and supported by the casing.

Power converter

An object of the present invention is to improve the cooling performance of a capacitor module used in a power conversion apparatus. The power conversion apparatus according to the present invention includes a power semiconductor module, a capacitor module, a flow path forming body that forms a flow path through which a cooling refrigerant flows . The flow path forming body includes a first flow path forming body that forms a first flow path part for cooling the power semiconductor module, and a second flow path forming body that forms a second flow path part for cooling the capacitor module. The first flow path forming body is provided on a side portion of the second follow path forming body and is integrally formed with the second flow path forming body. The second flow path forming body forms a housing space for housing the capacitor module above the second flow path part . The first flow path part is formed at a position facing the side wall that forms the housing space. The power semiconductor module is inserted into the first flow path part.

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Hitachinaka, Japan

Masashi Kosuga