High voltage moving magnet bidirectional proportional electromagnet

Abstract

The invention provides a high-pressure-resistant moving-magnet type bidirectional proportional electromagnet which comprises push rods, yokes, a shell, control coils, a first permanent magnet, a magnetic conduction ring, an armature, a second permanent magnet, limiting plates, guide sleeves and non-magnetic rings. Flanges of the yokes are matched with inner holes of the guide sleeves, and the three guide sleeves are magnetic conductors, are separated from one another by the non-magnetic rings made of non-magnetic-conduction materials and then are integrated with one another by means of welding. Compared with the prior art, the high-pressure-resistant moving-magnet type bidirectional proportional electromagnet has the advantages that the permanent magnets are used as main moving components, so that the shortcoming of constraints due to magnetic saturation and the like can be overcome, and outputted force of a system can be greatly increased; the outputted force or displacement can be bidirectionally and continuously controlled, and zero positions and dead zones can be prevented; the high-pressure-resistant moving-magnet type bidirectional proportional electromagnet is high-oil-pressure-resistant and can be used as a wet electro-mechanical converter; the high-pressure-resistant moving-magnet type bidirectional proportional electromagnet is simple in structure and low in manufacturing cost.

Description

technical field [0001] The invention relates to an electro-mechanical converter for an electro-hydraulic servo valve and a proportional valve in the field of fluid control, in particular to a high-voltage-resistant moving magnet bidirectional proportional electromagnet. Background technique [0002] Proportional electromagnets can convert input electrical signals into force or displacement output, and are the core components of electro-hydraulic servo / proportional control systems, but traditional proportional electromagnets can only provide unidirectional drive output. Invention patent CN10155281B discloses a permanent magnet operating mechanism that uses two sets of coils to alternately energize to achieve linear reciprocating motion, but it cannot achieve proportional control and cannot work in an oil pressure environment; invention patent CN1258775C discloses a permanent magnet operating mechanism that uses permanent magnet The proportional electromagnet that can be optim...

AI Technical Summary

Problems solved by technology

[0002] Proportional electromagnets can convert input electrical signals into force or displacement output, and are the core components of electro-hydraulic servo / proportional control systems, but traditional proportional electromagnets can only provide one-way drive output

Invention patent CN10155281B discloses a permanent magnet operating mechanism that uses two sets of coils to alternately energize to achieve linear reciprocating motion, but it cannot achieve proportional control and cannot work in an oil pressure environment; invention patent CN1258775C discloses a permanent magnet operating mechanism that uses permanent magnet The proportional electromagnet with two-way output can reduce the energy consumption of the system, but its moving part is a moving iron, and the magnetic saturation problem of the moving iron limits the further improvement of its output force

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