Capacitor cover and power conversion device

• US 10,109,419 B2
• Filed: 09/30/2016
• Issued: 10/23/2018
• Est. Priority Date: 04/01/2014
• Status: Active Grant

• Current Assignee: Kabushiki Kaisha Yaskawa Denki
• Original Assignee: Kabushiki Kaisha Yaskawa Denki
• Inventors: Morihara, Takayuki, Kubo, Yuto, Nagatomo, Shigekatsu
• Primary Examiner(s): Wu, James
• Application Number:
  US15/281,074
• Publication Number:
  US 20170018355A1
• Time in Patent Office: 753 Days
• CPC Class Codes: H01G 2/02 Mountings
• CPC Class Codes: H01G 2/04 specially adapted for mounting on a chassis
• CPC Class Codes: H01G 2/10 Housing; Encapsulation
• CPC Class Codes: H01G 4/224 Housing; Encapsulation
• CPC Class Codes: H02M 7/003 Constructional details, e.g. physical layout, assembly, wiring or busbar connections
• CPC Class Codes: H05K 7/1432 specially adapted for power drive units or power converters
• CPC Class Codes: H05K 7/14322 wherein the control and power circuits of a power converter are arranged within the same casing

Abstract

A capacitor cover configured to store a plurality of capacitors of a power conversion device is provided. The capacitor cover includes a first cover including a plurality of types of first contact surfaces configured to be in contact with one side of each surface of the capacitors of plurality of types with different sizes.

Claims

1. A power conversion device comprising:

a capacitor cover configured to store a plurality of capacitors, comprising;

a first cover comprising a plurality of types of first contact surfaces configured to be in contact with a portion of each surface of the capacitors of plurality of types with different sizes;

a second cover configured to be detachably attached to the first cover, the second cover comprising a plurality of types of second contact surfaces configured to be in contact with another portion of the each surface of the capacitors of plurality of types with different sizes at positions corresponding to the first contact surfaces, the second cover being configured to define a first storage part for storing at least one of the plurality of capacitors between the first cover and the second cover when the second cover is attached to the first cover; and

a securing plate secured to at least one of the first cover and the second cover in the first storage part so as to be positionally changed, the securing plate configured to be secured to one end of the at least one of the plurality of capacitors.

2. The power conversion device according to claim 1,

wherein the first cover comprises the plurality of types with a different inside dimension of the first contact surfaces each having a concave shape, and

wherein the second cover comprises the plurality of types with a different inside dimension of the second contact surfaces each having a concave shape.

3. The power conversion device according to claim 2,

wherein the first cover comprises the plurality of types with a different curvature radius of the first contact surfaces each having a concave shape, and

wherein the second cover comprises the plurality of types with a different curvature radius of the second contact surfaces each having a concave shape.

4. The power conversion device according to claim 3,

wherein the first cover comprises a first stepped surface on a boundary between the two first contact surfaces each having the different curvature radius,

wherein the second cover comprises a second stepped surface on a boundary between the two second contact surfaces each having the different curvature radius, and

wherein the securing plate is secured at a position of the at least one of the first cover and the second cover such that a gap with a predetermined dimension is formed between another end of the at least one of the plurality of capacitors secured to the securing plate and at least one of the first stepped surface and the second stepped surface.

5. The power conversion device according to claim 4,

wherein the securing plate comprises a terminal connection part having conductivity and configured so as to be electrically connected with a ground terminal disposed on the one end of the at least one of the plurality of capacitors.

6. The power conversion device according to claim 5,

wherein at least one of the first cover and the second cover comprises a hook part configured to hook a wiring of the power conversion device.

7. The power conversion device according to claim 6,

wherein the capacitor cover comprises a plurality of leg parts disposed on a plurality of positions on a peripheral edge of one cover of the first cover and the second cover, the plurality of leg parts defining a second storage part for storing a switching element of the power conversion device at a side opposite to the first storage part of the one cover.

8. The power conversion device according to claim 1, further comprising:

a housing to which the capacitor cover is secured; and

the plurality of capacitors stored in the capacitor cover.

9. The power conversion device according to claim 8,

wherein the at least one of the plurality of capacitors is a cylindrical type capacitor configured to extend along a cylindrical axis direction in an overcurrent state, and the at least one of the plurality of capacitors comprises a ground terminal which is electrically connected with a securing plate of the capacitor cover at the one end, and comprises a wiring terminal to which a cable wiring is connected at another end.

10. A capacitor cover configured to store a plurality of capacitors of a power conversion device, comprising:

a first cover comprising a plurality of types of first contact surfaces configured to be in contact with a portion of each surface of the capacitors of plurality of types with different sizes;

a second cover configured to be detachably attached to the first cover, the second cover comprising a plurality of types of second contact surfaces configured to be in contact with another portion of the each surface of the capacitors of plurality of types with different sizes at positions corresponding to the first contact surfaces, the second cover being configured to define a first storage part for storing at least one of the plurality of capacitors between the first cover and the second cover when the second cover is attached to the first cover; and

a securing plate secured to at least one of the first cover and the second cover in the first storage part so as to be positionally changed, the securing plate configured to be secured to one end of the at least one of the plurality of capacitors.