Demagnetizing device of electromagnet

Abstract

The invention discloses a demagnetizing device of an electric magnet, which comprises a working magnet core, an electromagnetic coil and an electromagnetic coil operating control circuit. The electromagnetic coil is also communicated with a current attenuation oscillating circuit, the current attenuation oscillating circuit is connected with the electromagnetic coil operating control circuit in parallel, and a control relay for controlling the electric magnet through working current and attenuation oscillating current is communicated to the electromagnetic coil operating control circuit; after the direct current electric magnet of the electromagnetic coil is powered off, an alternating current power supply charges power to a charging capacitor through the current attenuation oscillating circuit and the electromagnetic coil, along with the continuous increase of the voltage at the both ends of the charging capacitor, the charging current is lower and lower, and the current passing through the electromagnetic coil is alternate, thereby the purpose that an electromagnetic cylinder is fast demagnetized is achieved. Through the improvement, the remnant magnetism problem of the electromagnetic coil is solved, thus a bunker scale can be automatically reset after being used for a long time, and the labor productivity is improved.

Description

technical field [0001] The invention relates to a demagnetization device, in particular to a demagnetization device for an electromagnet used in the measurement work of traction bucket scales in the cement manufacturing industry. Background technique [0002] In the cement manufacturing industry, a large number of feeding hopper scales are used as a measuring tool for batching. The batching control system of the magnet traction metering feeding hopper scale adopts the automatic periodic zero measurement method. The measurement adopts the cycle control method, the mechanical structure is simple, reliable, easy to use and maintain, and the measurement is accurate. The electromagnetic coil is often easy to use in the early stage of use. With the extension of the use time, its internal iron core and iron pipe are easily magnetized. Therefore, after the electromagnetic coil is powered off, due to the existence of residual magnetism, after the hopper scale unloads the material, I...

AI Technical Summary

Problems solved by technology

The electromagnetic coil is often easy to use in the early stage of use. With the extension of the use time, its internal iron core and iron pipe are easily magnetized. Therefore, after the electromagnetic coil is powered off, due to the existence of residual magnetism, after the hopper scale unloads the material, It cannot be reset quickly by itself, or even cannot be reset. It must be manually reset before the next working process can be carried out normally. Sometimes it has to be replaced with a new electromagnetic coil to solve the problem of residual magnetism, which seriously restricts the output and quality of cement and increases the number of workers. labor intensity and equipment maintenance costs

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