RU1369619C - Magnetostrictive step motor for linear movements - Google Patents

Abstract

The invention relates to electrical engineering, relates to linear motion stepper motors and may find application in high-precision automatic control systems in machine tools, optical-mechanical devices, etc. The aim of the invention is to increase the accuracy of movement. The magnetostrictive stepper motor of linear displacements contains a working element in the form of a tube with ribs, CLAMS, a closing casing. Clips are placed between the ribs of the working body and mounted on the casing. The working body, ribs and clamps have magnetizing windings made of a material with the same magnetostriction coefficient. In the initial state, the working element is not magnetized, but the zhzhtsmy are magnetized. To work out a step, one of the clamps is de-energized. Then power is supplied to the working member and it is extended. Its new position is fixed by the first clamp, and the second clamp is de-energized. After de-energizing the coil of the working element, power is supplied to both clamps. The presence of ribs eliminates undesirable deformation of the working body. Its clamp on the side surfaces of the ribs enhances fixation. All this leads to a greater accuracy of working out the movement step. I zp f-ly, 2 ill. g СО 05; о 05

Description

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13696

The invention relates to electrical engineering, relates to linear motion stepper motors, and may find application in high-precision automatic control systems in machine tools, optical-mechanical devices, etc.

The aim of the invention is to increase the accuracy of movement.

Figure 1 shows a magnetostrictive linear displacement motor, section; figure 2 is the same, section LL in figure 1.

The engine contains a magnetostrictive working element 1, made in the form of a wheelhouse, on which a magnetizing coil 2 is placed. The tube is provided with longitudinal ribs 3, on which magnetizing windings are wound through holes A and grooves 6. Clamps 7 are mounted between the ribs 3 and mounted on a ferromagnetic casing 8 with screws 9 and a magnetizing winding 10, each of which is placed in the longitudinal grooves 11 and 12.

The ribs of the working body are rectangular in cross section. involves clamping segmented in cross section and vice versa. Any other reverse versions of the clamps and ribs are possible, provided that their contact occurs on their lateral surfaces. In addition, the magnetostriction sign of the materials of the working body (its ribs) and the clamps must be the same.

The device operates as follows.

In the initial state, the magnetizing coil 2 is de-energized, and current flows through the windings 6 and 10, due to which the clamps 7 fix the ribs 3 of the working body. When one of the clamps is de-energized, for example, in FIG. 1 of the upper, i.e. while turning off the current in the upper windings 6 and 10, their elements are compressed under the action of elastic forces, which leads to a sharp decrease in the clamping force. Next, a current is supplied to the coil 2, while the working element is extended by a relative value d 1/1 - 7 3 P / ES, where 1 is the length of the working body; Hell - the relative maximum magnitude of magnetostriction; P is the load; E is the modulus of elasticity; S is the area of the tube of the working body. Under the influence of a magnetic flux created by kagutako

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2, closing through the ribs 3 and the casing 8 of the engine, the ribs are elongated in the direction of passage of the magnetic flux and shortened in the perpendicular direction on the sides of the ribs, further inhibiting the working body. After that, current is supplied to the windings of the upper clamp for fixing the working displacement. In this case, a general r-1 magnetic flux occurs, passing through the lugs and ribs in a circle. Then, the Katugaka 2 and the magnetization windings 6 and 10 of the lower clamp are de-energized. "In this case, the working element returns to its initial state. The step cycle ends with the supply of current to the windings of the lower clamp.

To move down, the sequence of the clamps changes.

When the working body and the clamps are made of material with a negative magnetostriction coefficient, the working state of the clamps is de-energized, and disinhibition is carried out by supplying currents to the windings of the ribs and clamps.

The implementation of the working body in the form of a tube with ribs and fixing it on the lateral surfaces of the ribs allows to eliminate mechanical deformations of the working body due to greater rigidity, causing the inverse magnetostrictive effect, which increases the accuracy of movement. In addition, the use of transverse magnetostriction of the ribs increases the clamping force of the clamps. Formula - from acquisition

Claims (2)

1. Magnetostrictive stepper motor of linear displacements, containing & w Magnetostrictive working member and clamps with magnetizing windings, characterized in that, in order to increase P1 of accuracy of movement, the magnetostrictive working member is made in the form of a tube with longitudinal ribs, and the plugs are made from magnetostrictive material having the same sign of magnetostrik1TS1I as that of the material of the working body, and are mounted on an additionally introduced ferromagnetic casing between the edges of the working body with the possibility of contact their lateral surface m. 2. The engine is pop.1, characterized by the fact that, in order to increase the fixing force, the ribs of the working body are equipped with winding 1 magnetized in ani. Figure 1