Electricity: electrical systems and devices – Control circuits for electromagnetic devices – Systems for magnetizing – demagnetizing – or controlling the...
Patent
1978-10-26
1980-05-20
Miller, J.
Electricity: electrical systems and devices
Control circuits for electromagnetic devices
Systems for magnetizing, demagnetizing, or controlling the...
73194CM, G01F 158
Patent
active
042042402
ABSTRACT:
A drive system for an electromagnetic flowmeter wherein the fluid to be metered is conducted through a flow tube to intersect a transverse magnetic field created by an electromagnet having an excitation coil. The resultant voltage induced in the fluid is transferred to a pair of electrodes mounted at diametrically-opposed points on the tube to yield a signal representing flow rate. The drive system, which is powered from an a-c line, includes a full-wave rectifier whose output voltage is applied periodically to the excitation coil at a rate which is low relative to the line frequency. In order to maintain the level of current through the coil at a substantially constant level during the excitation period without, however, consuming an undue amount of energy, the coil is shock-excited by a high voltage surge derived from the rectifier to generate a current flow therein having a substantially constant current level, thereby producing a steady-state flux field minimizing the presence of unwanted components in the output signal of the flowmeter.
REFERENCES:
patent: 3396314 (1968-08-01), Corson et al.
patent: 3577040 (1971-05-01), Campbell, Jr.
patent: 3706011 (1971-12-01), Vincent
patent: 3783687 (1974-01-01), Mannherz et al.
patent: 3790862 (1974-02-01), Kampf et al.
patent: 3894430 (1975-07-01), Rummel et al.
patent: 3955413 (1976-05-01), Steele et al.
patent: 3996797 (1976-12-01), Rorimaru et al.
patent: 3999443 (1976-12-01), Appel et al.
patent: 4041546 (1977-08-01), Steward
Ebert Michael
Fischer & Porter Co.
Miller J.
Schroeder L. C.
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