Energy-saving environment-friendly type contactor

Abstract

The invention discloses an energy-saving environmentally-friendly contact used in a power system with alternating current of 50Hz, rated voltage of 660V and current of 630A, comprising a casing and a coil installed within the casing, a movable iron core, an immovable iron core, an immovable contact, a movable contact and a spring; the coil is winded on the immovable iron core, the movable contact is fixedly installed on the movable iron core, the movable iron core and the immovable iron core are installed correspondingly, the immovable contact is installed on the casing and provided corresponding to the movable contact, the spring is installed between the movable iron core and the immovable iron core, the movable iron core or the immovable iron core adopts magnetic steel materials having high magnetic density after magnetization and free of remaining magnets after demagnetization, thus dramatically reducing power consumption of the contactor in operation, solving the issue about the heated coil and the heated iron core and prolongs the service life, the coil is prevented from being burned as the current and noise are not formed within the coil, and shaking resulted from impact of the power net is not present either, which prominently extends the service life of the contactor.

Description

Technical field [0001] The invention discloses a contactor, in particular an energy-saving and environment-friendly contactor used in an electric power system with AC 50Hz, rated voltage 660V, and rated current up to 630A. Background technique [0002] As an electric starting device, AC contactors are widely used in the breaking and control circuits of power systems. The AC contactors in the prior art are usually composed of two "hill"-shaped iron cores, one of which is used as a static iron core. The static iron core is wound with a coil. After power on, the coil generates a magnetic field, attracts the moving iron core and drives the moving iron core to move, so that the moving contact on the moving iron core is attracted to the static contact installed on the shell, so that the power system is guided. through. At present, the moving iron core and static iron core in the public domain are made of thin silicon steel sheets. When working, the iron core is prone to eddy currents, ...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the above-mentioned shortcomings of the AC contactor in the prior art, such as large power consumption, easy heat generation, unstable operation, and high noise, the present invention provides a new AC contactor. Iron core and static iron core adopt composition weight ratio: C 0.05%, Si 0.02%, Mn 0.2%, P 0.015%, S 0.02%, Al 0.04%, Cr 0.02%, Ni 0.01%, Cu 0.01%, and the rest are The magnetic density of Fe is high after magnetization, and there is no magnetic steel after demagnetization. When working, a DC pulse is passed through, and the magnetic flux of the iron core is in a closed loop state. The contactor is in the closed state depending on the remanence of the iron core itself; stop When in use, an alternating current pulse is applied to demagnetize the iron core, and the contactor is opened by spring thrust.

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