Electricity: power supply or regulation systems – External or operator controlled – Using a transformer or inductor as the final control device
Patent
1987-12-29
1989-06-06
Beha, Jr., William H.
Electricity: power supply or regulation systems
External or operator controlled
Using a transformer or inductor as the final control device
323247, 323254, 323334, 336 12, 336143, 336147, 336155, G05F 304
Patent
active
048374970
ABSTRACT:
A variable transformer, reactor having a core combining at least two complete core elements wiht a common yoke; primary winding divided into two independently fed sets of phase coils wound in opposite direction, arranged on symmetrical legs of core elements and separated by the common yoke; secondary winding with each phase coil divided into two wound in opposite direction portions carried by symmetrical core legs, adjacent to the primary coils and separated by common yoke. The secondary short-circuited reactor winding is reduced to at least one close loop member with loop portions separated by the common yoke. The single, polyphase apparatus has at least one primary coil per set that includes a controllable device in circuit relation therewith to enable control of one primary coil relative to the other, either in current magntidue or in current phase shift. The controllable device being either a silicon control rectifier, triac or transistor. By continuous control of the controllable device an apparatus variable output parameters are obtained.
REFERENCES:
patent: 2089860 (1937-08-01), Rypinski
patent: 2363881 (1944-11-01), Lord
patent: 4547721 (1985-10-01), Drapp
patent: 4678986 (1987-07-01), Barthelemy
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