Electronic-magnetic current isolator circuit

Details Electronic-magnetic current isolator circuit Electronic-magnetic current isolator circuit

G - Physics

01

R

324/59

G01R 19/00 (2006.01) G01R 15/18 (2006.01) G01R 17/06 (2006.01) G01R 19/20 (2006.01)

Patent

CA 1155496

21 DSX 2536 ELECTRONIC-MAGNETIC CURRENT ISOLATOR CIRCUIT ABSTRACT OF THE DISCLOSURE Disclosed is a circuit for providing an electrical output signal proportional to but electrically isolated from a current flowing in a power circuit, and more particularly, to the current supplied to the field or armature winding of a DC motor load which receives power from a rectifier circuit coupled to an AC power source. The circuit includes a transformer including at least two winding, a primary and a secondary, wound on a saturable core. The primary winding is coupled to the power circuit, whereas the secondary winding is coupled to an output circuit along with control circuit means which are adapted to keep the core out of saturation in response to a power current flowing in the primary winding which by itself is adapted to drive the core into saturation. Accordingly, the time the core is not in saturation an output current flows in the secondary winding, which is related to the primary current by the turns ratio of the transformer.

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