High-speed two-way permanent-magnetic reset proportion electromagnet

Abstract

The invention discloses a high-speed two-way permanent-magnetic reset proportion electromagnet. A coil framework is coaxially arranged in a shell; three ring grooves are formed in an outer side surface of the framework; a linear hall sensor is adhered in the middle ring groove; electromagnetic coils are reversely wound and connected in series in the ring grooves at two sides of the middle ring groove; one side of the coil framework is fixedly connected with a rear end cover; a cylindrical push rod is coaxially arranged in the coil framework, one end with a rod extends out of the shell of the electromagnet and is in clearance fit with a shell hole of the electromagnet, and an outer permanent magnetic ring is sleeved on the outer side of the other end of the cylindrical push rod; and an inner permanent magnetic ring is coaxially arranged in the cylindrical push rod and is fastened on a small end face of a zero position adjusting screw through a set screw. The inner and outer permanent magnetic rings from a linear magnetic spring, so that the high-speed two-way permanent-magnetic reset proportion electromagnet has a relatively high magnetic spring elasticity modulus, the quality of amovable iron core is reduced, the natural frequency of an electromagnet system is increased, a displacement closed-loop regulating system is formed with an external proportional amplifier through position feedback of the linear hall sensor, and the valve core displacement adjustment accuracy and the system closed-loop bandwidth are improved.

Description

technical field [0001] The invention relates to an electromagnet, in particular to a high-speed bidirectional permanent magnet reset proportional electromagnet. Background technique [0002] Pneumatic proportional control technology is a new application technology developed from traditional on-off pneumatic technology to proportional servo control. Pneumatic proportional servo valve is a necessary core component of pneumatic servo positioning motion control system, and is a typical representative of mechanical and electrical integration products. The development of pneumatic proportional servo components represents the highest level of scientific and technological research and development of pneumatic component manufacturers. [0003] The proportional electromagnet is the key component of the pneumatic proportional valve. Its input is generally the current or voltage signal output by the proportional amplifier, and the output is the push-pull force or displacement, which dr...

AI Technical Summary

Problems solved by technology

This structure has the advantages of large output force and simple structure, but the mass of the moving iron is large, the inertia is large, the inductance of the coil is large, the nonlinearity and hysteresis are obvious, the system response is slow, and it can only move in one direction, requiring an external mechanical spring to reset. The zero dead zone can generally only be used for low-speed proportional pressure reducing valves, etc., and cannot meet the requirements of pneumatic proportional servo flow directional valves with fast dynamic response requirements

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