Metallized film capacitor
First Claim
1. A metallized film capacitor comprising a capacitor element, the capacitor element being made by one of winding and laminating a first polypropylene (PP) film having metal-deposited electrodes on both sides thereof, and a second PP film opposed to the first PP film, wherein a lengthwise heat shrinkage factor at 120°
- C. of the second PP film is at least 4%.
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Accused Products
Abstract
A metallized film capacitor made by winding or laminating a both-side metallized polypropylene (PP) film and a non-metallized PP film. Limiting the heat shrinkage factor and the thickness of the PP films, the position of deposited electrodes, and the rate of the peeled area of the deposited electrodes to a curtain range provides a metallized film capacitor having improved dielectric strength, tan δ, and charge-discharge characteristics.
14 Citations
23 Claims
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1. A metallized film capacitor comprising a capacitor element, the capacitor element being made by one of winding and laminating a first polypropylene (PP) film having metal-deposited electrodes on both sides thereof, and a second PP film opposed to the first PP film, wherein a lengthwise heat shrinkage factor at 120°
- C. of the second PP film is at least 4%.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 20, 21)
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11. A metallized film capacitor comprising a capacitor element, the capacitor element being made by one of winding and laminating a first polypropylene (PP) film having deposited electrodes on both sides thereof, and a second PP film opposed to the first PP film, wherein a widthwise heat shrinkage factor at 120°
- C. of the first PP film is at most 1%.
- 12. A metallized film capacitor comprising a capacitor element, the capacitor element being made by one of winding and laminating a first polypropylene (PP) film having deposited electrodes on both sides thereof, and a second PP film opposed to the first PP film, wherein one of the deposited electrodes on at least one side of the first PP film has an insulating margin at one edge, and another deposited electrode is provided at an edge on a side of the insulating margin.
- 14. A metallized film capacitor comprising a capacitor element, the capacitor element being made by one of winding and laminating a first polypropylene (PP) film having deposited electrodes on both sides thereof, and a second PP film opposed to the first PP film, wherein the first PP film is thicker than the second PP film.
- 16. A metallized film capacitor comprising a capacitor element, the capacitor element being made by one of winding and laminating a first polypropylene (PP) film having deposited electrodes on both sides thereof, and a second PP film opposed to the first PP film, wherein the deposited electrodes essentially consist of zinc, a rate of a peeled area of the deposited electrodes in a capacity-forming electrodes portion is up to 4%, and the capacity-forming electrodes portion has the deposited electrodes formed oppositely on both sides.
Specification