An arc-extinguishing magnetic circuit with dislocation distribution of magnetic steel and its DC relay

Abstract

Disclosed are an arc extinction magnetic circuit having misaligned magnetic steel and a direct-current relay thereof. The arc extinction magnetic circuit comprises a contact portion. The contact portion comprises two stationary contacts respectively for providing current inflow and outflow and a movable contact spring. Two ends of the movable contact spring respectively cooperate with the two stationary contacts. Each of the outer sides of the two ends in the length direction of the movable contact spring is respectively provided with a piece of first magnetic steel. Each of the outer sides of the two ends in the width direction of the movable contact spring is respectively provided with a piece of second magnetic steel, and the two pieces of second magnetic steel are misaligned. The two pieces of first magnetic steel face each other with opposite poles, and the two pieces of second magnetic steel also face each other with opposite poles. In the present invention, two pieces of magnetic steel in the middle in the length direction of the movable contact spring are misaligned, the distance between the two adjacent pieces of magnetic steel is reduced, the strength of a magnetic field between the two adjacent pieces of magnetic steel is then enhanced, thereby greatly enhancing the strength of an arc extinction magnetic field and the strength of the magnetic field which provides ampere force for the movable spring, and substantially increasing the magnetic utilization rate of the magnetic steel.

Description

technical field [0001] The invention relates to a DC relay, in particular to an arc-extinguishing magnetic circuit with dislocation distribution of magnetic steel and the DC relay, which are used for cutting off high-voltage and high-current DC loads. Background technique [0002] The relay is an electronic control device, which has a control system (also known as the input circuit) and a controlled system (also known as the output circuit), usually used in automatic control circuits, it actually uses a smaller current to control a larger An "automatic switch" of electric current. Therefore, it plays the role of automatic adjustment, safety protection, and conversion circuit in the circuit. DC relay is one of the relays. Most of the existing DC relays adopt the scheme of moving reed direct action (also known as solenoid direct action). For example, Hongfa, Tyco, Panasonic, LS and other manufacturers all use screw Straight line solution. [0003] The contact part of this k...

AI Technical Summary

Problems solved by technology

In this four pieces of magnetic steel scheme, it is further proposed to increase the magnetic yoke 107 (as figure 2 shown), but the main magnetic flux 108 formed by the two magnetic steels 102 can only enhance the intensity of the arc-extinguishing magnetic field, and its leakage magnetic flux 109 also cancels each other in providing the ampere force to the moving spring. Therefore, the magnetic steel The magnetic utilization rate is relatively low

[0006] Additionally, if figure 1 As shown, the leakage magnetic flux 106 is generated between the adjacent magnetic steel 102 and the magnetic steel 103, because the magnetic steel 103 is in the middle of the length of the moving reed 101, and the distance between the magnetic steel 102 is relatively far, so Just make the leakage magnetic flux 106 relatively small, so that the magnetic field strength used to realize the arc extinguishing and the magnetic field strength used to provide the ampere force to the moving spring are not enough

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