High-frequency direct-acting force motor based on mixed air gap

Abstract

The invention discloses a high-frequency direct-acting force motor based on a mixed air gap. The high-frequency direct-acting force motor comprises an armature component, a yoke component, a reset spring component, a front end cover and a shell, and the armature component comprises a first armature, a second armature and a push rod; and 90-degree bosses opposite in direction protrude out of diagonal lines of the long sides of the armature respectively, a connecting bridge circuit is arranged between two arms of a yoke frame of the yoke component in a striding mode, a control coil is installedin the middle of the connecting bridge circuit, and the opposite sides of the ends of the two arms of the yoke frame protrude out to form four symmetrical axial pole shoes. The control coil is completely symmetrical and equal along the path from the yoke frame to the four axial pole shoes; the armature component is arranged in a three-dimensional space formed by four axial pole shoes, four secondradial pole shoes and a connecting bridge circuit of the yoke frame; the yoke frame and bosses of the first armature and the second armature respectively form a first working air gap, a third workingair gap, a second working air gap and a fourth working air gap in the axial direction; and the armature part and the four radial pole shoes of the yoke part are in one-to-one correspondence to form radial air gaps.

Description

technical field [0001] The invention belongs to an electric-mechanical converter for a servo proportional valve in the field of fluid transmission and control, in particular to a high-frequency direct-acting force motor based on a mixed air gap. [0002] technical background [0003] Among the electro-hydraulic control devices, the electro-mechanical converter is a key component. Improving the frequency response and load capacity of the electro-mechanical converter is a prerequisite for improving the frequency response of the electro-hydraulic servo valve. At present, the electro-mechanical converters used in electro-hydraulic control devices mainly include permanent magnet torque motors, moving coil force motors, proportional electromagnets and moving iron force motors. [0004] Electric-mechanical converters for valves can be divided into linear displacement type and angular displacement type according to the form of movable parts. According to the structure of movable par...

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Problems solved by technology

[0009] Meng Bin et al. proposed a high-frequency direct-acting force motor, which has the characteristics of high-frequency response and large output force, but the single-side arrangement of the control coil makes the distance between the four working air gaps unequal, resulting in uneven distribution of the magnetic circuit. , the magnetic flux in the working air gap is asymmetrical, and the reciprocating output force is different, which is a point that needs to be improved

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