Multi permanent magnet high speed two-way electromagnet

Abstract

The invention provides a multi-permanent magnet high-speed two-way electromagnet. Each permanent magnet high-speed electromagnet comprises an iron core, a coil, an outer shell, an annular small permanent magnet and a large permanent magnet, wherein each iron core comprises a cylindrical primary magnetic pole and a circular secondary magnetic pole; each coil is arranged in a coil mounting groove; each outer shell sleeves the outside of each iron core; an annular flange extends out of the bottom of each primary magnetic pole or each secondary magnetic pole; the small permanent magnet is inlaid between each annular flange and each primary magnetic pole or each secondary magnetic pole; each small permanent magnet is in radial radiation magnetization; two permanent magnet high-speed electromagnets are symmetrically arranged; an armature and a valve rod are shared by the two permanent magnet high-speed electromagnets; a through hole is formed in the middle of each primary magnetic pole; the valve rod is arranged in each through hole in a penetrating manner; the armature is fixed on the valve rod; each large permanent magnet is a cylindrical ring which is concentric with each iron core and is inlaid between two pairs of magnetic poles arranged up and down; and each large permanent magnet is in radial radiation magnetization. The multi-permanent magnet high-speed two-way electromagnet is fast in response, high in stability, low in leakage flux and applicable to an electronic-controlled fuel system of a diesel engine, and can be in two-way motion.

Description

technical field [0001] The invention relates to an electromagnet, in particular to a high-speed electromagnet for an electronically controlled fuel system of a diesel engine. Background technique [0002] Electronically controlled fuel injection system is the development direction of modern diesel engine fuel system. An electromagnet whose response speed can reach milliseconds can be called a high-speed electromagnet. At this stage, whether it is a time control system or a pressure-time control high-pressure common rail system, high-speed electromagnets are important components to ensure the normal operation of the electronically controlled fuel system. Its strong electromagnetic force and fast response characteristics directly affect the fuel injection timing. and precise control of fuel injection volume. In order to meet the increasingly stringent emission regulations, improve fuel economy, and reduce harmful emissions, higher requirements are placed on the performance o...

AI Technical Summary

Problems solved by technology

[0003] Conventional E-type electromagnets have a high operating frequency. Due to repeated magnetization, the eddy current loss increases and the heat production increases, which affects the magnetic permeability of magnetic materials and reduces the stability and reliability of the electromagnet.

Moreover, conventional electromagnets are prone to magnetic flux leakage, which will adversely affect the performance of the electromagnet.

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