Nissan Motor Company Limited

Nagaoka University of Technology

Manabu Koshijo

Junichi Itoh

Masao Saito

Kouji Yamamoto

Takamasa Nakamura

Yoshiya Ohnuma

Hironori Koyano

Tsutomu Matsukawa

There is disclosed a power conversion apparatusfor converting polyphase ac power directly to ac power. A conversion circuit includes first switching devicesand second switching devicesconnected, respectively, with the phases R, S, T of the polyphase ac power, and configured to enable electrical switching operation in both directions. There are provided input lines R, S, T connected with input terminals of the switching devices and output lines P, N connected with output terminals of the switching devices. The output terminals of the first switching devices and the output terminals of the second switching devices are, respectively, arranged in a row. The first switching devices and second switching devices are arranged side by side with respect to a direction of the rows. The output lines are disposed below the input lines in an up and down direction.

Power conversion device

A power conversion apparatus is for converting polyphase ac power directly to ac power. A conversion circuit includes a plurality of first switching devicesand a plurality of second switching devicesconnected, respectively, with the phases R, S, T of the polyphase ac power, and configured to enable electrical switching operation in both directions. There are provided a plurality of condensersconnected with the conversion circuit. At least one of the condensers is provided, for each of the first switching devices and the second switching devices, between two of the phases of the polyphase ac power. It is possible to reduce a wiring distance between the condenser and the switching devices.

Three phase to single phase power conversion device with reduced wiring between condensers and switches

Provided is a power converterthat directly converts polyphase AC power to AC power. A converter circuit has a plurality of first switching elementsandthat are connected to each phase R, S or T of the polyphase AC power to enable switching for turning on current-carrying bidirectionally, and a plurality of second switching elementsandthat are connected to each phase to enable switching for turning on current-carrying bidirectionally. The converter circuit comprises input lines R, S and T connected to each input terminal, and output lines P and N connected to each output terminal. Parts of wiringandof protection circuitsare located between output lines P and N. The wiring distance between each protection circuitand the corresponding switching element can be shortened.

Power converter

Provided is a power converterthat directly converts polyphase AC power to AC power. A converter circuit has a plurality of switching elementsandwhich are connected to each phase R, S or T of the polyphase AC power to enable switching for turning on current-carrying bidirectionally. At least three condenserstoare provided between phases of the converter circuit. The three condensers are respectively placed at apexes of a triangle on a plane that is in parallel with a part-mounting surface on which the switching elements are actually mounted. The wiring distance between the condensers and the switching elements can be shortened.

Power conversion device with reduced wiring distance

Provided is a power converterthat directly converts polyphase AC power to AC power. A converter circuit has a plurality of first switching elementsandand a plurality of second switching elementsand, both of which are connected to each phase R, S or T of the polyphase AC power to enable switching for turning on current-carrying bidirectionally. Condenserstoare provided between phases. Input terminals of the first switching elements and those of the second switching elements are arranged to form respective lines. Some of the plurality of condensersandare arranged to be angled relative to the arrangement direction of the terminals. The wiring distance between the condensers and the switching elements can be shortened.

There is disclosed a power conversion apparatusfor converting polyphase ac power directly to ac power. A conversion circuit includes a plurality of first switching devicesand a plurality of second switching devicesconnected, respectively, with the phases R, S, T of the polyphase ac power, and configured to enable electrical switching operation in both directions. Output linesformed by a pair of busbars are connected with the conversion circuit. The first switching devices and the second switching devices are so arranged that output terminals are arranged in a row. The output linesare connected with the output terminals and drawn out rectilinearly in one direction.

Growing community of inventors

Atsugi, Japan

Manabu Koshijo