Parallel magnetic circuit multi-adhesion surface high-speed electromagnet

Abstract

The invention provides a high-speed electromagnet with multiple attracting and engaging surfaces in a parallel magnetic circuit. It includes shell, iron core, armature, coil, permanent magnet and yoke iron. The iron core is composed of outer iron core and inner iron core. The shell is a cylinder with a stepped through hole in the center, and the outer iron core is a cylinder with a center. The hole is cylindrical, the inner iron core is a cylinder with a flange at the bottom, the height of the inner iron core is equal to the depth of the central cylindrical hole of the outer iron core, the permanent magnet is a magnetic ring, and the permanent magnet is located on the outer iron core and the inner iron core flange Among them, the magnetization direction of the permanent magnet is radial radiation magnetization, the yoke is a cylinder with a tapered through hole in the center, the end of the tapered through hole of the yoke with a small radius is close to the lower end surface of the outer iron core, and the armature is Conical, the taper angle of the armature is equal to the taper angle of the yoke taper through hole. The invention has the characteristics of strong electromagnetic attraction, quick response and low driving current, and is suitable for the electric control fuel system of the diesel engine.

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] With the development of diesel engine electronic control technology, the electronically controlled fuel injection system has gradually replaced the mechanical fuel injection control system and has become an important technology for diesel engine fuel injection control. At present, diesel engines are facing increasingly stringent emission regulations and lower fuel consumption requirements, and electronic control technology is an important means to meet these requirements. An electromagnet whose response speed can reach milliseconds can be called a high-speed electromagnet. The high-speed electromagnet is an important component of the electronically controlled fuel injection system of a diesel engine. It can accurately and flexibly control the fuel injection timing, fuel in...

AI Technical Summary

Problems solved by technology

However, the high current increases the power consumption of the electromagnet and the heat generated by the coil, which puts forward higher requirements on the temperature characteristics of the coil and its sealing materials, and reduces the safety reliability and life of the electromagnet; The main working time of the electromagnet, the current action time is long, especially when the fuel system is in a large pulse width working state, the action time is longer, and the heat generated by the coil is greatly increased at this time. If the maintenance current can be further reduced at this time, the electromagnetism will be greatly improved. The safety and reliability of the valve can also speed up the release speed of the armature

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