A Magnetic Latching Relay with Parallel Magnetic Circuit

Abstract

The invention discloses a magnetic latching relay with a parallel magnetic circuit. The magnetic latching relay comprises a magnetic circuit portion, the magnetic circuit portion comprises an iron core, an armature, a yoke, magnetic steel, a magnetic conduction part and a coil, the L-shaped yoke comprises a first yoke and a second yoke, the first yoke is parallel to the iron core, the second yoke is perpendicular to the iron core, the iron core penetrates the coil, the upper end of the iron core is provided with a pole piece, the lower end of the iron core is fixed to the second yoke, the armature is mounted at the edge of the yoke, one end of the magnetic conduction part is connected with the first yoke, the other end of the magnetic conduction part is connected with the first yoke through the magnetic steel, a magnetic shield groove for increasing the magnetic resistance of a magnetic loop is formed in the first yoke between the joint of the first yoke and the magnetic steel and the joint of the first yoke and the magnetic conduction part, a cut section is formed on one side of the pole piece, and the size of the cut section is matched with that of the magnetic shield groove to adjust action of the relay and mutual balance of reset voltage parameters. The cut section of the iron core is matched with the magnetic shield groove, so that reset voltage values and set voltage values of the magnetic latching relay can be as balanced as possible.

Description

technical field [0001] The invention relates to a relay, in particular to a magnetic latching relay of a parallel magnetic circuit. Background technique [0002] Relay is an automatic switching element with isolation function, which is widely used in communication, automobile, automatic control, household appliances and other fields, and is one of the most important control elements. [0003] With the need for energy saving and environmental protection, the application range of magnetic latching relays is becoming wider and wider, and more and more general-purpose relays need to expand the magnetic latching specifications. In order to achieve magnetic retention in a typical snap-in relay, the iron core (or yoke) is generally divided into two parts, and a permanent magnet is connected in series in the middle to form a series magnetic circuit. When the coil is energized, the magnetic circuit is closed, and the magnetic force generated by the permanent magnet can keep the arma...

AI Technical Summary

Problems solved by technology

[0005] 1. Because the permanent magnetic force always attracts the armature to the iron core, although the reaction force of the reed itself is quite large, the contact pressure at the normally closed end of the product is relatively small, resulting in weak load capacity at the static closing end, and at the same time, the resistance of the relay product Poor shock and vibration performance;

[0006] 2. When the return excitation is applied to the coil, the magnetic force of the permanent magnet still has a strong suction force on the armature, and a large restoring force is required to return the armature to the released state. In the case of improper matching between the magnetic force and the restoring force, the coil may appear The set voltage is very small, the reset voltage is very large, and even cannot be reset

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