Electricity: power supply or regulation systems – Including a transformer or an inductor – Polyphase or plural transformers
Patent
1992-02-14
1993-06-01
Beha, Jr., William H.
Electricity: power supply or regulation systems
Including a transformer or an inductor
Polyphase or plural transformers
336 5, 336 84C, 336170, H01F 1504
Patent
active
052163563
ABSTRACT:
A motor control system includes a single, multicompartment enclosure mounted on a skid. The enclosure contains a transformer circuit and a motor controller circuit interconnected so that only external connections to a power source and a load are needed. When the circuits are energized, access to high voltage motor control components and to field replaceable fuses and output selection switches is prevented by a double interlocking mechanism which operates in conjunction with energizing and deenergizing the transformer. The transformer of the transformer circuit includes a tertiary winding disposed radially between a primary winding and a secondary winding. The winding filters electrostatically coupled transients. A conventional electrostatic shield is also used so that the transformer is doubly shielded to electrostatic transients. The tertiary winding is connected to one or more capacitors to filter magnetically coupled transients. A current limiting fuse, a load sensing fuse and a primary make/break switch are connected in electrical series to the primary winding. Methods for energizing or operating a motor utilizing the primary switch and the load sensing fuse are also disclosed.
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Sketch labeled "Prior Art #1"-believed to be known, in public use or on sale at least one year before Oct. 31, 1990.
Sketch labeled "Prior Art #2"-believed to be known, in public use or on sale at least one year before Oct. 31, 1990.
Sketch labeled "Prior Art #3"-believed to be known, in public use or on sale at least one year before Oct. 31, 1990.
Sketch labeled "Prior Art #4"-believed to be known, in public use or on sale at least one year before Oct. 31, 1990.
Sketch labeled "Prior Art #5"-believed to be known, in public use or on sale at least one year before Oct. 31, 1990.
Sketch labeled "Prior Art #6"-believed to be known, in public use or on sale at least one year before Oct. 31, 1990.
Beha Jr. William H.
Southwest Electric Company
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