An electromagnetic mechanism with cascaded magnetic cores and its energy-saving contactor

Abstract

The invention discloses an electromagnetic mechanism with a cascade magnetic core. The electromagnetic mechanism comprises the cascade magnetic core and an electromagnetic coil. The cascade magnetic core comprises at least two sets of iron core assemblies which are the first iron core assembly and the second iron core assembly respectively. The first iron core assembly comprises a first fixed iron core and a first movable iron core, and the second iron core assembly comprises a second fixed iron core and a second movable iron core. A second elastic piece is arranged between the second movable iron core and the second fixed iron core and a first elastic piece is arranged between the first movable iron core and the first fixed iron core. The first movable iron core is in linkage connection with the second movable iron core through a linkage mechanism. The invention further discloses an energy-saving contactor which is provided with the electromagnetic mechanism with the cascade magnetic core. The energy-saving contactor comprises a shell, and a working contact, the electromagnetic coil and the cascade magnetic core are arranged in the shell. By means of the electromagnetic mechanism with the cascade magnetic core, the distance between the movable iron cores and the fixed iron cores when the alternating-current contactor is under the release condition can be effectively shortened, so that the ampere windings of the alternating-current contactor under the same clearance requirement are greatly reduced, the requirements for power supply currents of the coil are lowered, the effect of iron core material and coil material saving is achieved and the energy saving effect is achieved.

Description

technical field [0001] The invention relates to an energy-saving contactor, in particular to an electromagnetic mechanism of cascaded magnetic cores. Background technique [0002] AC contactors are mainly used for frequent switching on or off of normal circuit work or remote control of large-capacity loads. The traditional AC contactor, such as the authorized announcement number: "Energy-saving Contactor" disclosed in the patent document of CN101572200B, includes a housing in which a working contact, an electromagnetic mechanism, a mechanical hook lock and an electrical chain are arranged. The mechanical hook lock is used to control the working state of the electromagnetic mechanism, so that the working contacts can maintain the closed working state without maintaining the current, so that there is no contact surface between the upper and lower iron cores. Although the energy-saving contactor with the above structure can make the electromagnetic coil not need to maintain th...

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Problems solved by technology

Although the energy-saving contactor with the above structure can make the electromagnetic coil not need to maintain the current and the contact can maintain its closed working state to achieve the purpose of energy saving; but because the electromagnetic mechanism of the above-mentioned AC contactor includes a set of coils and a pair of upper and lower iron cores, when in When used in the state of high current or high voltage, in order to ensure safe and reliable breaking, the AC contactor needs to ensure sufficient distance between the dynamic and static contacts, so that when the upper and lower iron cores are broken, the distance between them is relatively far, so a higher Magnetic field to achieve the purpose of pull-in, which requires a larger current, that is, requires a higher number of ampere-turns

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