Drive magnetic system

FIELD: electricity.

SUBSTANCE: drive magnetic system includes magnetic conductor with at least one constant magnet and armature. Magnetic conductor and at least one constant magnet form at least one nonmagnetic gap. Armature installation provides gap entrance or exit. On magnetic conductor from the side where armature enters and exits the gap there is at least one projection contacting side surface of constant magnet.

EFFECT: changing effect of boundary leakage flux on magnetic system armature.

8 dwg

 

The invention relates to the field of power devices, in particular to actuators with permanent magnets, and can be used in devices with power magnetic connection between the moving parts, for example, in machines, appliances, automation elements, etc.

Known for integrating the accelerometer described in U.S. patent No. 5614700, NN 35/14, publ. 1997.03.25 and selected as a counterpart, which contains a magnetic circuit with the windings and measuring mass in the form of a permanent magnet, the poles of which are oriented in a side of the magnetic circuit. The cores in the axial cross section of the coils have a sharp profile in the direction of magnetization of the permanent magnet. The required value of traction when moving permanent magnet is provided by selection of the angle profile and its offset relative to the axis of the magnet. The disadvantages of the known device lies in the fact that the existing form of the magnetic circuit eliminates the possibility of adjusting the maximum value of the traction regardless of tractive effort on the parts of the input (output) measuring mass in the channel; to adjust traction is required, the replacement or modification of the magnetic circuit, which is impossible without disassembly of the accelerometer.

Magnetic drive system, described in A.S. NO. 920974, NC 33/02, 01F 7/13, publ. in BI No. 14 15.04.82 and selected to the operation of the prototype, contains a fixed magnetic circuit with a permanent magnet forming at least one non-magnetic gap, and an anchor that is installed with the possibility of entry clearance or leave it. A disadvantage of the known device lies in the fact that there is no possibility of independent regulation traction in the gap and at the entrance of the anchor into the gap or leaving due to changes impact on the armature magnetic flux boundary scattering of the magnetic system. The influence of the magnetic flux boundary scattering is random, because in each particular magnetic system of the regional magnetic scattering depends on many parameters of the magnetic system (actual dimensions of the armature, magnetic, magnets, non-magnetic gap, the physical properties of materials and so on), as well as from magnetic fields surrounding elements.

The problem to which the invention is directed, is to create a magnetic drive system with traction control at the entrance of the anchor into the gap or exit.

The technical result obtained by the implementation of this invention, is the ability to change the influence of the magnetic flux boundary scattering on the magnetic anchor system.

This is achieved by a magnetic drive system, comprising a fixed the magnetic circuit, at least one permanent magnet forming at least one non-magnetic gap, and an anchor that is installed with the possibility of entry clearance or leave it, what is new is that the magnetic circuit on the input side of the anchor into the gap or withdrawal is made at least one protrusion is in contact with the side surface of the permanent magnet.

Performing on the magnetic circuit on the input side of the anchor into the gap and exit from at least one ledge leads to the fact that the regional magnetic scattering change their form and close the path of least magnetic resistance, i.e., through the projection of the magnetic circuit, thus there is a possibility of rational use of influence anchored magnetic flux boundary scattering of the magnetic system. Obviously, the closer the projection is located to the side surface of the permanent magnet, the less magnetic resistance for the passage of magnetic flux boundary scattering and less than the distance at which the regional magnetic scattering affect the anchor when it is closer to the side surface of the magnet. Therefore, the execution of the protrusion in contact with the side surface of the permanent magnet reduces the distance over which the regional magnetic scattering affect the anchor, resulting in a change in the influence of the and the armature magnetic flux boundary scattering when entering it into the gap or exit.

Changing the shape of the protrusion (for example, triangular, rectangular and other) changes the shape of the force lines of magnetic flux boundary scattering, thereby regulating the distance at which the regional magnetic scattering affect the anchor at the entrance to the gap or exit. Resizing protrusion (height, thickness, width) leads to a change in magnetic resistance of the circuit through which the regional magnetic scattering, resulting in a change in the value of the effort impacts on the anchor at the entrance to the gap or the output.

When implementing the claimed invention, it is possible to perform projection removable, this simplifies the regulation of traction force at the entrance of the anchor into the gap or leaving, as it does not require disassembly of the magnetic system.

In figures 1, 2 shows a magnetic drive system with one magnet and one protrusion is rectangular in shape and the corresponding graph of traction movement of the armature when entering it into the gap.

In figures 3, 4 shows a magnetic drive system with two rectangular protrusions and the corresponding graph of traction movement of the armature when entering it into the gap.

In figures 5, 6 show the magnetic drive system with two rectangular protrusions increase the frame size and the corresponding graph of traction movement of the armature when entering it into the gap.

In figures 7, 8 shows a magnetic drive system with two projections of a triangular shape and the corresponding graph of traction movement of the armature when entering it into the gap.

Here: 1 - core; 2 - permanent magnet; 3 - anchor; 4 - lug; 5 - the magnetic field lines in the gap; 6 - power line magnetic flux boundary scattering; And the direction of movement of the armature; L - move anchor; F - traction; Δ - non-magnetic gap.

The invention is implemented as follows. Magnetic drive system includes a magnetic core 1, one (see figure 1) or a couple (see figure 3, 5, 7) permanent magnets 2 and the armature 3 is mounted with the ability to enter into non-magnetic gap Δ in the direction A. the Permanent magnets 2 create a magnetic field with lines of force 5 in the gap Δ and the power lines 6 magnetic flux boundary scattering. On the magnetic core 1 on the input side of the anchor into the gap made the tabs 4 of different shapes and sizes (see figure 1, 3, 5, 7)that are in contact with the side surface of one (see figure 1) or each of the two (see figure 3, 5, 7) permanent magnets 2.

The claimed device, for example a magnetic system with two projections of rectangular shape (see figure 3), works as follows. Anchor 3, initially located at some distance from the magnetic system, starts moving in the direction And the od of the force. At this section on the anchor 3 is unaffected regional magnetic scattering, since the power line 6 almost all closed through the protrusions 4. Closer to the armature 3 to the gap Δ increasing number of power lines 6 magnetic flux boundary scattering begins to withdraw through the anchor 3, while the pulling force is increased. When entering the armature 3 in the gap Δ between the first protrusions 4 and forth between the permanent magnets 2 the magnitude of the driving force F is gradually withdrawn and the amount of traction force becomes constant.

If necessary, more gently sloping based traction movement of the anchor lug 4 of rectangular shape is larger (see figure 5).

The claimed device, for example a magnetic system with projections of a triangular shape (see Fig.7), works in a similar way, while ensuring maximum cool, close to the relay, the dependence of the traction movement of the armature when entering it into the gap.

Thus, performance on the magnetic circuit on the input side of the anchor into the gap of the protrusion in contact with the lateral surface of the magnet allows you to provide for the regulation of traction force of the magnetic system at the entrance of the anchor into the gap due to changes impact on the armature magnetic flux boundary scattering, which is suitable is m by selecting the shape and dimensions of the ledge.

Magnetic drive system containing a magnetic core, at least one permanent magnet forming at least one non-magnetic gap, and an anchor that is installed with the possibility of entry clearance or leave it, characterized in that the magnetic circuit on the input side of the anchor into the gap or withdrawal is made at least one protrusion is in contact with the side surface of the permanent magnet.



 

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