Patent classifications
H
ELECTRICITY
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H01
ELECTRIC ELEMENTS
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H01F
MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
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H01F7/06
Electromagnets; Actuators including electromagnets
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H01F7/18
Circuit arrangements for obtaining desired operating characteristics, e.g. for slow operation, for sequential energisation of windings, for high-speed energisation of windings
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H01F7/1805
Circuit arrangements for holding the operation of electromagnets or for holding the armature in attracted position with reduced energising current
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H01F7/1811
demagnetising upon switching off, removing residual magnetism
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