Method for reproducing direct currents and a direct current...

Details Method for reproducing direct currents and a direct current... Method for reproducing direct currents and a direct current...

2005-05-24

2005-05-24

Nguyen, Tuyen T (Department: 2832)

Inductor devices

Core surrounding linear conductor

Reexamination Certificate

active

06897758

ABSTRACT:
The circuit contains a primary coil on the core (2) of a magnetic circuit with an air gap and switchable into a line carrying the measurement current. A secondary compensation coil (5), with an order higher winding count and mounted on the core, is connected to the output of a controllable compensation current source (6). The output of a Hall element (11) in the air gap is connected to the control input of the compensation source.A further coil (14) on the core is connected to an additional controllable current generator (15) whose control input (16) is driven by a measurement device (13) for the compensation current via a control and evaluation circuit (17).USE/ADVANTAGE—Measuring a.c. and d.c. Can be produced at low cost and all drift occurring during measurement can be compensated.

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