Arrangement for generating DC magnetic fields of alternating pol

Details Arrangement for generating DC magnetic fields of alternating pol Arrangement for generating DC magnetic fields of alternating pol

1982-08-06

1983-10-18

Eisenzopf, Reinhard J.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific current responsive fault sensor

361101, 361156, 363 58, 363 89, H02H 300, H02H 7122

Patent

active

044109261

ABSTRACT:
An arrangement for generating DC magnetic fields of alternating polarity for the magnetic-inductive flow measurement by means of a field coil which is connected via alternately controlled switching members to a DC voltage source, wherein during the reversal time following the change-over of the switching members a capacitor is connected to the field coil to form a resonant circuit separate from the DC voltage source and the capacitance C of the capacitor in dependence upon the desired reversal time .DELTA.t has substantially the value ##EQU1## wherein L is the inductance and R the ohmic resistance of the field coil.

REFERENCES:
patent: 3284692 (1966-11-01), Gautherin
patent: 3733538 (1973-05-01), Kernick et al.
patent: 3893006 (1975-07-01), Algeri et al.

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