A Relay Magnetic Circuit Structure That Can Increase Initial Suction Force and Balance Force

Abstract

The invention relates to a relay magnetic circuit structure capable of increasing the initial suction balance force, which comprises a magnetizer (1), a coil (2), an iron core (4), an armature (5), a pole piece (6), and a magnetic steel (7), U-shaped pole piece (8) and L-shaped pole piece (9), the magnetic circuit structure is formed by adding an L-shaped pole piece on the side of the magnetic steel to conduct the magnetic field generated by the coil to form a coil auxiliary circuit, and this The magnetic field is opposite to the direction of the magnetic field generated by the magnetic steel, which produces a partial magnetic force offset, so as to meet the conditions of a large static pressure (that is, a large initial magnetic holding force) and at the same time reduce the initial suction force through the instantaneous magnetic force offset by coil excitation. Conditions, thereby reducing the demand for coil driving force for product performance improvement, and solving the problem that the coil design cannot be changed due to limited space, limited weight, and limited power consumption. The present invention has a simple structure and a wide range of applications.

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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