Abstract: A heat pipe cooled capacitor includes a capacitor body having opposing first and second ends and an opening defined between the opposing ends. A first heat pipe is thermally and electrically connected to the first end of the capacitor body. A second heat pipe is positioned at least partially through the opening of the capacitor body. The second heat pipe is thermally connected to the second end of the capacitor body, and electrically isolated from the first heat pipe.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: A capacitor having a large current carrying capacity includes a hollow core formed by a non-conducting tubular section, and a capacitor winding wrapped around the tubular section. A thermal cutoff device is disposed within the hollow core. The thermal cutoff device is configured to sense a predetermined temperature level within the hollow core and disable the current carrying capacity of the capacitor. The thermal cutoff device is disposed at a geometric center of the capacitor winding, which is also the hot spot of the capacitor winding. The thermal cutoff device includes first and second conductors electrically connected to each other with a predetermined solder alloy. The first conductor includes a cross-sectional portion that is attached to the second conductor. The cross-sectional portion is subjected to a springing force in a lateral direction away from the second conductor.

Abstract: A capacitor having a large current carrying capacity includes a hollow core formed by a non-conducting tubular section, and a capacitor winding wrapped around the tubular section. A sensor is disposed within the hollow core. The sensor is configured to sense a predetermined temperature level within the hollow core and provide an alert external to the capacitor winding.

Abstract: 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.

Abstract: A metallized film capacitor in which the metallization is made as thin as possible in order to increase the dielectric strength of the film. In the industry, typical metallization thicknesses range from approximately 1-4 ohms/sq, however, the present invention employs thicknesses which range from 5-300 ohms/sq. And, depending on which thickness is used, the effective dielectric strength of the film can be substantially increased. Additionally, the capacitor or various components thereof are exposed to a gas plasma for further increasing the dielectric breakdown voltage.

Abstract: A metallized film capacitor in which the metallization is made as thin as possible in order to increase the dielectric strength of the film. In the industry, typical metallization thicknesses range from approximately 1-4 ohms/sq, however, the present invention employs thicknesses which range from 5-300 ohms/sq. And, depending on which thickness is used, the effective dielectric strength of the film can be substantially increased.

Abstract: 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.

Abstract: 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.

Abstract: A hermetically sealed capacitor including a metal tape (e.g, copper) having an adhesive on one side and being folded and wrapped around the capacitor winding in the manner that a Christmas package is wrapped. After wrapping, the tape initially extends beyond both ends of the capacitor. The tape is then folded at one end of the capacitor. The seam of the tape overlapping itself (along the length of the capacitor) and the fold at the one end of the capacitor are each soldered. On the other end of the capacitor, a ceramic header having a through hole (for one of the capacitor leads) is positioned. The tape extends beyond the ceramic header and is folded so as to make contact with the ceramic header. The seam between the metal tape and the ceramic piece is then soldered. In this way, a small, hermetically sealed capacitor is obtained.

Abstract: A wrap and fill capacitor having an cuffed tape outer wrapping is provided. The cuffs comprise a conductive foil folded about, or extending beyond, the edges of a high temperature resistant dielectric tape. The device is particularly suited for surface mounting.

Abstract: A wrap and fill capacitor having a cuffed tape outer wrapping is provided. The cuff comprises a thin conductive foil folded about the edges of a high temperature resistant dielectric tape. The device is particularly suited for surface mounting.

Abstract: An improved metallized wrapped capacitor pressed into a predetermined cross-sectional form substantially without edge radii, together with its method of manufacture are disclosed. The capacitor is formed from elongated mated dielectric webs, each having an electrode deposited on its face. The webs are superposed and rolled into a coil having concentric turns. The coil is pressed into a mold to derive a cross-section that mates with electrically conductive end caps. The end caps are affixed physically and electrically at each end of the formed capacitor element. The entire assembly with the exception of portions of the end caps are subjected to vacuum impregnation of epoxy resin to provide physical strength and to provide environmental protection. A form of coil mold is described.

Abstract: A planar terminated capacitor and a method for fabricating planar terminated capacitors is disclosed wherein a capacitor element is inserted in a nonconductive ceramic case. The case extends outwardly beyond the ends of the capacitor element forming cavities at each end of the case. Metal end caps are positioned at the ends of the case substantially enclosing the cavities. The end caps are electrically coupled to the ends of the capacitor element.

Abstract: 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.

Abstract: 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.

Abstract: A planar terminated capacitor and a method for fabricating planar terminated capacitors is disclosed wherein a capacitor element is inserted in a nonconductive tubular sleeve. The sleeve extends outwardly beyond the ends of the capacitor element forming cavities at each end of the sleeve. These cavities are filled with a conductive substance and metal end caps are positioned at the ends of the sleeve substantially enclosing the cavities. The conductive substance electrically couples the end caps to the ends of the capacitor element.