Electricity: power supply or regulation systems – Input level responsive – Using a transformer or inductor as the final control device
Patent
1979-03-28
1981-01-06
Pellinen, A. D.
Electricity: power supply or regulation systems
Input level responsive
Using a transformer or inductor as the final control device
324117R, 323310, H01F 4014
Patent
active
042439310
ABSTRACT:
A current isolator circuit generates an electrically isolated output current which is related to an input current. The current isolator includes a magnetically saturable transformer having a core and first, second, and third windings. The input current flows through the first winding, and the output current flows through the second winding. The third winding is driven by a periodic drive signal, which alternately drives the transformer between first and second magnetically saturated states. When a change in the input current occurs, the magnetizing current in the third winding changes, thereby causing a change in the time required to drive the transformer from the first to the second magnetically saturated state, and an opposite change in the time required to drive the transformer from the second to the first magnetically saturated state. The difference in saturation times is sensed and is used in controlling the magnitude of the output current flowing through the second winding. As a result, the output current again attains its predetermined relationship to the input current, and the current isolator is returned to a balanced condition.
REFERENCES:
patent: 3500171 (1970-03-01), Kusters et al.
patent: 3699442 (1972-10-01), Riley
patent: 3916310 (1975-10-01), Stark et al.
patent: 4027235 (1977-05-01), Macrander et al.
patent: 4054829 (1977-10-01), Searle
patent: 4064449 (1977-12-01), Macrander
patent: 4096363 (1978-06-01), Earp
patent: 4163189 (1979-07-01), Smutny
Pellinen A. D.
Rosemount Inc.
LandOfFree
Current isolator does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Current isolator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Current isolator will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-287348