Abstract: A zinc metallized film capacitor includes a dielectric fluid comprising epoxidized soybean oil having at least one epoxy group per molecule, preferably four epoxy groups per molecule. Utilizing epoxidized soybean oil with zinc metallization results in a substantial performance improvement under high temperature and high voltage conditions, providing a zinc metallized film capacitor of reduced size and cost. In addition, the epoxidized soybean oil is relatively non-toxic, reducing environmental concerns.
Abstract: A metallized film capacitor includes an aromatic ester dielectric fluid including 2.0-5.0% by weight of an epoxide in an aromatic ester such as dioctyl phthalate. Utilizing such a particular amount of epoxide results in a substantial performance improvement under high temperature and voltage conditions, providing a metallized film capacitor of reduced size and cost.
Abstract: A fluorescent ballast assembly has a primary coil wound on a primary coil bobbin and a lag coil wound on a lag coil bobbin, each coil having wire starts, taps and finishes. A strip circuit board including a plurality of pin receiving holes and a plurality of wire insertion holes corresponding to the wire starts, tabs and finishes, is attached substantially perpendicular to and in contact with the bobbins. The strip circuit board has an insulating support with conductive strips attached thereto, preferably manufactured using automated equipment. Substituting a mechanically constructed and assembled strip circuit board for a printed circuit board eliminates the need for chemical plating or etching operations, reducing costs and easing assembly.
Type:
Grant
Filed:
June 21, 1988
Date of Patent:
January 30, 1990
Assignee:
Magnetek Universal Mfg. Corp.
Inventors:
Raymond H. Van Wagener, Robert A. Kulka, Frederick P. Bauer, Leonard J. Kurgan