Capacitor structure
This capacitor structure is provided with a capacitor body in which a plurality of wound-type capacitors are housed in a housing, and which is fixed to a fixing object via a fastening tool (a cylindrical member and a fixing bolt). The capacitor structure is configured such that the capacitor body is fixed to the fixing object by inserting the fastening tool into at least one of a gap formed between the outer peripheral surfaces of the wound-type capacitors or gaps formed between the outer peripheral surfaces of the wound-type capacitors and the inner wall of the housing, in a state in which the wound-type capacitors are installed side by side on the floor of the housing.
1. A capacitor structure comprising:
a plurality of wound-type capacitors;
a housing which houses the plurality of wound-type capacitors; and
a fastener which fixes a capacitor body in which the plurality of wound-type capacitors are stored in the housing to a fixing object,
wherein, in a state in which the wound-type capacitors are arranged side by side on a bottom of the housing, the capacitor body is configured to be fixed to the fixing object by inserting the fastener into at least one of gaps formed between outer peripheral surfaces of the respective wound-type capacitors or formed between the outer peripheral surfaces of the respective wound-type capacitors and an inner wall of the housing,
the housing into which the wound-type capacitors and the fastener are inserted is filled with a resin and the wound-type capacitors are fixed in the housing by the resin, and
the fastener includes:
a metallic cylindrical member formed to be longer than an overall length of the wound-type capacitors and inserted into the at least one of the gaps; and
a fixing bolt inserted from an outside of the housing into the cylindrical member so as to pass through the cylindrical member and screwed to the fixing object to be fixed.
2. The capacitor structure according to claim 1 ,
wherein the fastener includes a heat conducting plate arranged so as to be in contact with the outer peripheral surfaces of the respective wound-type capacitors arranged side by side, and
the heat conducting plate is thermally joined to the metallic cylindrical member.
3. The capacitor structure according to claim 1 ,
wherein a cross-sectional shape of the cylindrical member is similar to a shape of the gap in a plan view, and
an outer wall surface of the cylindrical member is configured to be in contact with the outer peripheral surfaces of the wound-type capacitors forming the gap.
4. The capacitor structure according to claim 1 , further comprising:
a first electrode plate arranged on a positive electrode terminal side of the respective wound-type capacitors; and
a second electrode plate arranged on a negative electrode terminal side of the respective wound-type capacitors,
wherein the metallic cylindrical member includes a first metallic cylindrical member and a second metallic cylindrical member,
the first metallic cylindrical member is joined to the first electrode plate,
the second metallic cylindrical member is joined to the second electrode plate, and
each of ends of the first metallic cylindrical member and the second metallic cylindrical member, which is fastened to the fixing object, is exposed to the outside of the housing to constitute a terminal.
5. The capacitor structure according to claim 4 , wherein a first insulating portion that insulates the first electrode plate from the second metallic cylindrical member is formed on the first electrode plate, and a second insulating portion that insulates the second electrode plate from the first metallic cylindrical member is formed on the second electrode plate.
6. The capacitor structure according to claim 4 , wherein a junction between the first metallic cylindrical member and the first electrode plate or a junction between the second metallic cylindrical member and the second electrode plate includes a step formed in a direction away from the wound-type capacitors.
7. The capacitor structure according to claim 6 , wherein the junction includes an insertion hole into which an end of the first metallic cylindrical member or the second metallic cylindrical member is inserted, and an edge of the insertion hole and the end of the first metallic cylindrical member or the second metallic cylindrical member are joined with solder.
8. A capacitor structure comprising:
a plurality of wound-type capacitors;
a housing which houses the plurality of wound-type capacitors; and
a fastener which fixes a capacitor body in which the plurality of wound-type capacitors are stored in the housing to a fixing object,
wherein, in a state in which the wound-type capacitors are arranged side by side on a bottom of the housing, the capacitor body is configured to be fixed to the fixing object by inserting the fastener into at least one of gaps formed between outer peripheral surfaces of the respective wound-type capacitors or formed between the outer peripheral surfaces of the respective wound-type capacitors and an inner wall of the housing,
the housing into which the wound-type capacitors and the fastener are inserted is filled with a resin and the wound-type capacitors are fixed in the housing by the resin,
the fastener includes:
a metallic cylindrical member inserted into the at least one of the gaps; and
a fixing bolt inserted from an outside of the housing into the cylindrical member and screwed to the fixing object,
the fastener includes a heat conducting plate arranged so as to be in contact with the outer peripheral surfaces of the respective wound-type capacitors arranged side by side, and
the heat conducting plate is thermally joined to the metallic cylindrical member.
9. The capacitor structure according to claim 8 , wherein a cross-sectional shape of the cylindrical member is similar to a shape of the gap in a plan view, and an outer wall surface of the cylindrical member is configured to be in contact with the outer peripheral surfaces of the wound-type capacitors forming the gap.
10. The capacitor structure according to claim 8 , further comprising:
a first electrode plate arranged on a positive electrode terminal side of the respective wound-type capacitors; and
a second electrode plate arranged on a negative electrode terminal side of the respective wound-type capacitors,
wherein the metallic cylindrical member includes a first metallic cylindrical member and a second metallic cylindrical member,
the first metallic cylindrical member is joined to the first electrode plate,
the second metallic cylindrical member is joined to the second electrode plate, and
each of ends of the first metallic cylindrical member and the second metallic cylindrical member, which is fastened to the fixing object, is exposed to the outside of the housing to constitute a terminal.
11. The capacitor structure according to claim 10 , wherein a first insulating portion that insulates the first electrode plate from the second metallic cylindrical member is formed on the first electrode plate, and a second insulating portion that insulates the second electrode plate from the first metallic cylindrical member is formed on the second electrode plate.
12. The capacitor structure according to claim 10 , wherein a junction between the first metallic cylindrical member and the first electrode plate or a junction between the second metallic cylindrical member and the second electrode plate includes a step formed in a direction away from the wound-type capacitors.
13. The capacitor structure according to claim 12 , wherein the junction includes an insertion hole into which an end of the first metallic cylindrical member or the second metallic cylindrical member is inserted, and an edge of the insertion hole and the end of the first metallic cylindrical member or the second metallic cylindrical member are joined with solder.