Film capacitor and connection type capacitor, inverter, and electric-powered vehicle

Patent metadata

Field	Value
Publication number	US-2016372264-A1
Application number	US-201515121060-A
Country	US
Kind code	A1
Filing date	Mar 3, 2015
Priority date	Mar 3, 2014
Publication date	Dec 22, 2016
Grant date	—

Abstract

There is a film capacitor capable of suppressing decrease in the electrostatic capacitance even after a self-healing phenomenon has occurred. A film capacitor includes a dielectric film; and an electrode film disposed on a principal surface of the dielectric film, the dielectric film containing an organic resin and an organic component having a higher volatility than the organic resin. The organic resin is preferably any one of a cyclic olefin-based resin, a polyarylate resin, a polyphenylene ether resin and a polyetherimide resin. The organic component is preferably at least one selected from the group consisting of cyclohexane, ethylcyclohexane, toluene, xylene, chloroform, and tetrahydrofuran.

First claim

1 . A film capacitor, comprising:
a dielectric film; and an electrode film disposed on a principal surface of the dielectric film, the dielectric film containing an organic resin and an organic component having a higher volatility than the organic resin.

2 . The film capacitor according to claim 1 , wherein the organic resin is a cyclic olefin-based resin.

3 . The film capacitor according to claim 2 , wherein the cyclic olefin-based resin is a ring-opening polymer or an addition copolymer.

4 . The film capacitor according to claim 2 , wherein the organic component is any one of cyclohexane, ethylcyclohexane, toluene, xylene, and a mixture of cyclohexane and toluene.

5 . The film capacitor according to claim 1 , wherein the organic resin is a polyarylate resin.

6 . The film capacitor according to claim 5 , wherein the organic component is any one of toluene, tetrahydrofuran, and n-methylpyrrolidone.

7 . The film capacitor according to claim 1 , wherein the organic resin is a polyphenylene ether resin or a polyetherimide resin.

8 . The film capacitor according to claim 7 , wherein the organic component is chloroform.

9 . The film capacitor according to claim 1 , wherein a content of the organic component contained in the dielectric film is 0.01 to 7 mass %.

10 . A connection type capacitor, comprising:
a plurality of the film capacitors according to claim 1 ; and a bus bar connecting the plurality of the film capacitors.

11 . An inverter, comprising:
a bridge circuit composed of switching elements; and a capacitor part connected to the bridge circuit, the capacitor part being composed of the film capacitor according to claim 1 .

12 . An inverter, comprising:
a bridge circuit composed of switching elements; and a capacitor part connected to the bridge circuit, the capacitor part being composed of the connection type capacitor according to claim 10 .

13 . An electric-powered vehicle, comprising:
a power supply; an inverter connected to the power supply; a motor connected to the inverter; and wheels driven by the motor, the inverter being composed of the inverter according to claim 11 .

14 . An electric-powered vehicle, comprising:
a power supply; an inverter connected to the power supply; a motor connected to the inverter; and wheels driven by the motor, the inverter being composed of the inverter according to claim 12 .

Assignees

• Kyocera Corp

Inventors

• Maeda Kazutaka
• Kato Wataru

Classifications

• H02P27/06

  using DC to AC converters or inverters (H02P27/05 takes precedence) · CPC title

• H01G4/005

  Electrodes · CPC title

• Y10S903/907

  Electricity storage, e.g. battery, capacitor · CPC title

• H01G4/33

  Thin- or thick-film capacitors {(thin- or thick-film circuits; capacitors without a potential-jump or surface barrier specially adapted for integrated circuits, details thereof, multistep manufacturing processes therefor)} · CPC title

• H01G4/32

  Wound capacitors · CPC title