Kabushiki Kaisha Yaskawa Denki

Kenji Isomoto

Shigekatsu Nagatomo

Takayuki Morihara

Shuhei Nohara

Koji Nuki

Makoto Kojyo

Masayuki Ono

Toshio Omata

Masafumi Sakai

Hideharu Okayama

Hiromi Imamura

Shintaro Imamura

A motor controller, which is inexpensive and has small size, is provided by reducing the size of a heat sink used in the motor controller and the number of all parts of the motor controller, wherein said motor controller includes a heat sink, a power semiconductor modules that is in close contact with the heat sink, a substrate () that is electrically connected to the power semiconductor module, and a fan () that generates the flow of external air and supplies cooling air to the heat sink, wherein said heat sink is formed by combining two kinds of heat sinks, which include a first heat sink () and a second heat sink (), so as to conduct heat therebetween, and, wherein said power semiconductor module is in close contact with the second heat sink ().

Motor controller

There is provided a motor controller that can easily reduce the size and manufacturing cost of a motor controller by reducing the size of a heat sink without increasing the number of parts much. The motor controller includes a heat sink, a plurality of power semiconductor modules that is in close contact with the heat sink, a substrate () that is electrically connected to the plurality of power semiconductor modules, and a fan () that generates the flow of external air and supplies cooling air to the heat sink. The heat sink is formed by the combination of two kinds of heat sinks that include a first heat sink () and a second heat sink (), and at least one of the power semiconductor modules is in close contact with each of the first and second heat sinks () and ().

A motor controller which eliminates a positioning operation between a power semiconductor element and a base plate to improve the assembly process is provided. The motor controller has a power semiconductor element closely contacted with a heatsink and mounted in a first base plate, wherein a spacer having an engaging section formed therein as a hole for the power semiconductor element is interposed between the heatsink and the base plate, and the power semiconductor element is positioned in the spacer. Further, the peripheral wall of the hole is arranged so as to shut off a space between a terminal projecting from the side of the power semiconductor element and the heatsink.

There is provided a motor control apparatus in which a size of the apparatus can easily be reduced, a work for aligning a power semiconductor module with a substrate can be eliminated and an assembling property can be enhanced. In a motor control apparatus in which a power semiconductor module adhering to a heat sink is mounted on a first substrate, a spacer is provided between the heat sink and the substrate and the power semiconductor module is disposed in the spacer. Moreover, an edge part of a hole has such a structure as to block a space between a terminal protruded from a side portion of the power semiconductor module and the heat sink.

Motor control apparatus and method of assembling motor control apparatus

Inverter controller

A cooling device for an electric equipment which is excellent in cooling efficiency and low in noise and permits easy mounting of a cooling fan and a fan guard, comprising a heat sink () having a U-shaped frame () consisting of a flat part () and side parts () disposed on the opposite sides of the flat part (), fins () formed on the frame () and fan guard mounting holes () formed in the side parts () of the frame (); a cooling fan () having an engaging recess () in the side thereof; and a U-shaped fan guard () consisting of a fan guard body () and side plates () disposed on the opposite ends of the fan guard body (); wherein a lattice body () is provided on the fan guard body (), an air guide () at the tip end of each side plate (), a fan mounting engaging projection () on the inner side surface of each side plate for clamping and retaining by engaging the cooling fan () and a projection support (), having an engaging projection () for mounting the fan guard () to the heat sink (), on the outer side surface of each side plate.

Growing community of inventors

Kitakyushu, Japan

Kenji Isomoto