Motor controller
AssigneeKabushiki Kaisha Yaskawa Denki
InventorsHideharu Okayama, Kenji Isomoto, Shuhei Nohara, Toshio Omata
Life of this patent
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Abstract
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.
Claims9
A motor controller comprising:
- a power semiconductor element closely contacted with a heatsink and mounted on a first base plate, wherein
- a spacer is interposed between the heatsink and the first base plate,
- the power semiconductor element is positioned in the spacer,
- the first base plate is mounted on the spacer, a first plurality of bosses are formed in the spacer, a first plurality of boss-passing sections are formed in the first base plate, and at least a second base plate is placed on the first plurality of bosses.
Dependencies are inferred from the claim text.