Relay magnetic circuit structure capable of increasing initial suction balance force

Abstract

The invention relates to a relay magnetic circuit structure capable of increasing initial suction balance force. The structure comprises a magnetizer (1), a coil (2), an iron core (4), an armature (5), a pole shoe (6), magnetic steel (7), a U-shaped pole shoe (8) and an L-shaped pole shoe (9). According to the magnetic circuit structure, L-shaped pole shoes are additionally arranged on the edges of magnetic steel. A magnetic field generated by the coil is conducted to form a coil auxiliary loop. The magnetic field and the magnetic field generated by the magnetic steel are opposite in directionto generate partial magnetic force cancellation so that the condition of large static pressure (namely large initial magnetic retention) is met, and meanwhile the condition of reducing initial attraction can be achieved through coil excitation instantaneous magnetic force counteracting. Therefore, the requirement of product performance improvement for coil driving force is reduced, the problem that the coil design cannot be changed due to space limitation, weight limitation and power consumption limitation is solved, the structure is simple, and the application range is wide.

Description

technical field [0001] The invention relates to a magnetic circuit structure, in particular to a magnetic circuit structure for a balanced force relay that can increase the initial suction force of the balanced force relay. Background technique [0002] The balanced force relay is one of the important branches in the field of relays. Compared with general relays, it mainly uses magnetic steel as the recovery device, which makes the main suction and reaction characteristics of the relay symmetrical and balanced, and overcomes the problem of the recovery spring used in general relays. (leaf spring, torsion spring) restores the connection, and the spring is prone to resonance and fatigue failure. [0003] In the current balance force relay, the magnetic circuit structure of the balance force relay that can increase the initial suction force uses the magnetic holding force generated by the permanent magnetic circuit produced by the magnetic steel as the holding force of the prod...

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Problems solved by technology

[0003] In the current balance force relay, the magnetic circuit structure of the balance force relay that can increase the initial suction force uses the magnetic holding force generated by the permanent magnetic circuit produced by the magnetic steel as the holding force of the product's static state, and then uses the electromagnetic force generated by the bias coil excitation. The force offsets the magnetic holding force of the magnetic steel to promote the partial rotation of the armature of the product, so that the coil of the product is in a moving state after being energized. After the coil is de-energized, the armature part returns to the initial state through a certain restoring force and continues to be kept in the static state through the magnetic holding force of the magnetic steel. state, through the above-mentioned process to realize the change of product excitation and de-excitation state, in this case, the resultant force of magnetic steel holding force plus partial restoring force is the initial reaction force of the magnetic circuit system, and the main source of reaction force is the magnetic holding force. Under the condition of static contact pressure, the environmental performance parameters of the product must also be met. This requires the coil to generate a driving force much greater than the holding force of the magnetic steel to meet the needs of product conversion. When the volume of existing products is limited, the environmental performance parameters are required to be more and more The higher the value, the more the magnetic holding force of the magnet needs to be improved to improve the holding force of the static fit, the more the driving force of the coil cannot meet the actual demand.

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