摘要:
A metallized wound capacitor which includes first and second dielectric webs. A first electrode having first and second portions is metallized on the first face of the first web. A second electrode having first and second portions is metallized on the first face of the second web. Either the first electrode, the second electrode, or both, are included of a plurality of spaced apart segments interconnected by wirings. The first and second electrodes extend from opposing dielectric web longitudinal edges leaving respective bare margins along opposing edges on the respective webs. Each second portion has a width equal to the opposing bare margin less a predetermined tolerance and is thicker than its respective first portion.
摘要:
The present invention involves a metallized wound capacitor having increased dielectric breakdown voltage which includes first and second dielectric webs. A first electrode having first and second portions, where the first portion is between 5-300 Ohms/square, is metallized on the first face of the first web, to a width less than the width of the first web. A second electrode having first and second portions is metallized on the first face of the second web to a width less than the width of the second web. The first and second electrodes extend from opposing dielectric web longitudinal edges leaving respective bare margins along opposing edges on the respective webs. Each second portion has a width equal to the opposing bare margin less a predetermined tolerance and is thicker than its respective first portion.
摘要:
A wound capacitor and method therefor having metallized elongated dielectric webs. An additional dielectric web is wound about the capacitor roll and forms a protective wrap. The additional web has a pair of metal foil band terminals formed on the side of the additional web remote from the capacitor roll with each band disposed adjacent a respective end of the capacitor roll and extending there beyond. Terminals are bonded to each end of the capacitor with each terminal contacting a respective metallized electrode and an adjacent metallic band. An additional dielectric web having a plurality of metal foil bands is also wound about a capacitor roll of electrodes formed in staggered and overlapping arrangement relative to each other. The capacitor roll is then chopped to form substantially small sized capacitors each having a protective wrap with a pair of metal foil band terminals.
摘要:
A wound capacitor and method therefor having metallized elongated dielectric webs. An additional dielectric web is wound about the capacitor roll and forms a protective wrap. The additional web has a pair of metallic band terminals formed on the side of the additional web remote from the capacitor roll with each band disposed adjacent a respective end of the capacitor roll. Terminals are bonded to each end of the capacitor with each terminal contacting a respective metallized electrode and an adjacent metallic bond. An additional dielectric web having a plurality of metallic bands is also wound about a capacitor roll of electrodes formed in staggered and overlapping arrangement relative to each other. The capacitor roll is then chopped to form substantially small sized capacitors each having a protective wrap with a pair of metallic band terminals.
摘要:
A capacitor module for use with an IGBT including an epoxy housing having two holes completely therethrough. Within the housing are two wound capacitors which are connected in parallel. Additionally, there are two mounting inserts which at least partially line the holes of the housing. The wound capacitors are also connected to the first and second mounting inserts which serve as the terminals for the capacitor module. As a result, the capacitor module exhibits very low self-inductance as well as very low ESR.
摘要:
A method is disclosed for making a wound capacitor having decreased inherent inductance and a high self-resonant frequency. In making this capacitor, metallized film is wound around a non-conductive polycarbonate core and a conductor is inserted through the entire length of the core. The wound metallized film is flattened and terminals are formed at opposite ends of the flattened wound capacitor. The conductor is folded over and electrically connected to one terminal and a metal contact is electrically connected to the other terminal. The electromagnetic field created around the conductor is approximately equal and in the opposite direction to the electromagnetic field created around the wound metallized film. Therefore, the inductive reactance of the conductor and the inductive reactance of the wound film are approximately equal. These reactances approximately cancel resulting in increased self-resonant frequency.
摘要:
A metallized wound capacitor having a pair of elongated dielectric webs with a first electrode metallized on a first face of each dielectric web. The first electrodes extend from opposing longitudinal edges leaving respective bare margins of the dielectric webs along opposing edges. Each of the dielectric webs also has a second electrode metallized on a second face and opposing the respective bare margin. Each second electrode has a width which is substantially no greater than the respective bare margin. In this manner, each second electrode does not extend in an opposing relationship with its respective first electrode.
摘要:
Finished electrical components having wire lead terminals are converted to elements having planar terminations by placing end caps or shoes over the ends of an existing component. A finished film capacitor having radial wire leads that is presently on a distributor's shelf, ready for shipment, may be converted to a capacitor for solder reforming by the use of these conversion caps. The capacitor may then be secured in a planar fashion to a substrate.
摘要:
Multiple wound film capacitors include a hollow core formed by a first non-conducting tubular section, and a first capacitor winding wrapped around the first non-conducting tubular section. Also included are a second non-conducting tubular section wrapped around the first capacitor winding, and a second capacitor winding wrapped around the second non-conducting tubular section. The multiple wound film capacitors may also include a third non-conducting tubular section wrapped around the second capacitor winding, and a third capacitor winding wrapped around the third non-conducting tubular section. In addition, ends of the first and second non-conducting tubular sections extend beyond ends of the first and second capacitor windings.
摘要:
A capacitor providing a thermal alert includes a wound film capacitor for carrying a large current when coupled to an AC generator. The wound film capacitor includes a hollow core extending from one end to another end of the capacitor. Also included are an in-line thermal switch, which is disposed in the hollow core for sensing a predetermined temperature; and a light indicator, which is coupled to the thermal switch. A single housing is integrally formed from an upper cover and a lower cover for housing the capacitor, the thermal switch and the light indicator. The upper cover of the housing is formed from translucent material. The thermal switch is configured to disconnect the wound film capacitor from the AC generator upon reaching the predetermined temperature, and activate the light indicator to emit a light. The upper cover is effective in transmitting the light from inside the housing to outside of the housing. The light indicator includes an incandescent light bulb, a neon bulb, or a light emitting diode (LED).