Electromagnet with magnetic memory for controlling vacuum contactors for rated currents of 160, 250, 400 A

• Published in: IOP conference series. Earth and environmental science Vol. 990; no. 1; pp. 12015 - 12019
• Main Authors: Yu Zaitsev, N, Zaitsev, Yu M, Ivanova, S P, Maksimov, V M, Petrov, V N, Svintsov, G P
• Format: Journal Article
• Language: English
• Published: Bristol IOP Publishing 01.02.2022
• Subjects: Coercivity; Contactors; Electromagnets; Ferromagnetism; Industrial development; Low voltage; Magnetic circuits; Magnetism; Mathematical analysis; Modernization; Permanent magnets; Vacuum; Wiring
• ISSN: 1755-1307; 1755-1315
• DOI: 10.1088/1755-1315/990/1/012015

Abstract The results of the development of a universal control circuit for a triggering polarized electromagnet for a low voltage vacuum contactor are presented. The circuit is implemented in the form of a printed wiring block and is unified with an element base with a control circuit for the KV2-160, KV2-250 vacuum contactors commercially produced by the domestic industry. The developed design of an electromagnetic drive with magnetic memory based on high-coercive permanent magnets is described. The working cycle of an electromagnet with a ferromagnetic shunt for the implementation of a manual return unit for the purpose of its use in emergency or necessary technological modes is considered. A block for manual return of contacts of a vacuum contactor using an eccentric transmission has been developed and implemented, which makes it possible to significantly reduce the effort of manual operation when returning the shunt to its original position for the operation of the contactor in normal mode. The classical graphical-analytical method for calculating magnetic circuits with permanent magnets has been modernized. The fundamentals of the modernized method for calculating magnetic circuits with permanent magnets are considered. The positive results of approbation of the developed calculation methods, which were implemented in the development of a vacuum contactor with magnetic memory and the function of manual return of the electromagnet armature and opening of the main contacts for the serial production of contactors, are noted.