Double permanent magnet high speed two-way electromagnet

Abstract

The invention provides a high-speed bidirectional electromagnet with double permanent magnets. It includes two permanent magnet high-speed electromagnets. Each permanent magnet high-speed electromagnet includes an iron core, a coil and an outer shell. The iron core is composed of a cylindrical main magnetic pole and a circular auxiliary magnetic pole. A coil is installed between the main magnetic pole and the auxiliary magnetic pole. The coil is installed in the coil installation groove, the outer casing is set outside the iron core, and the main magnetic pole or the auxiliary magnetic pole extends from the bottom of the annular flange, and also includes an annular permanent magnet, which is embedded in the annular flange and the main magnetic pole or auxiliary magnetic pole. In the middle of the magnetic poles, the magnetization direction of the permanent magnet is radial radiation magnetization. Two permanent magnet high-speed electromagnets are symmetrically arranged and the permanent magnet ends are opposite. The two permanent magnet high-speed electromagnets share an armature and a valve stem. The middle of the main magnetic pole With a through hole, the valve stem passes through the through hole, and the armature is fixed on the valve stem. The double permanent magnet high-speed bidirectional electromagnet of the present invention has fast response speed, small drive current, bidirectional movement, long service life and high reliability, and is suitable for electronically controlled fuel oil systems of diesel engines.

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 continuous development of diesel engine electronic control technology, electronically controlled fuel injection system has become an inevitable trend to meet the increasingly stringent diesel engine emission regulations. The electronically controlled fuel injection system is an effective means to improve the high fuel economy of diesel engines and reduce harmful emissions due to its characteristics of high injection pressure, fuel injection timing, and flexible and controllable fuel injection rules. An electromagnet whose response speed can reach milliseconds can be called a high-speed electromagnet. High-speed electromagnet is an important component of diesel engine electronic control unit and fuel injection device. Its fast response characteristic is the premise...

AI Technical Summary

Problems solved by technology

[0003] The commonly used traditional E-type electromagnet is generally driven by the Hold&Peak method. However, the high current increases the power consumption and heat production of the solenoid valve, and puts forward more stringent requirements for the working temperature of the coil and its sealing materials. At the same time Caused the reliability and life of the solenoid valve to decline

The pull-in phase of the armature is maintained by a small current, especially when working with a large pulse width, it will also increase the heat generation of the coil, resulting in a decrease in the magnetic permeability of the magnetic material

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