CN202818064U - Single lateral moving-magnet linear motor - Google Patents

Abstract

The utility model discloses a unilateral moving magnet linear motor, which includes a stator and a mover moving relative to the stator, wherein the stator includes a single-row track composed of several linearly arranged coil modules, the The mover includes a U-shaped slider nested on the track and movable along the track, and magnetic dry sheets with interleaved N poles and S poles are symmetrically arranged on both sides of the U-shaped slider. Since the movable U-shaped moving magnetic slider is set on the fixed single-row stator coil track as the mover, the material used for the magnetic dry sheet is saved, and ordinary cables can be used for power supply, which saves power consumption and reduces the suction of the magnetic rail. The risk of foreign matter is low, and the cost is low, the structure is simple, and it has broad market application prospects.

Description

A unilateral moving magnet linear motor

technical field

The utility model relates to a motor, in particular to a unilateral linear motor in which a magnetic track moves relative to a stator.

Background technique

Linear motor is a kind of transmission device that directly converts electrical energy into linear motion mechanical energy without any intermediate conversion mechanism. Compared with traditional screw drive, it has simple structure, no contact, no wear, low noise, fast speed and high precision. With high advantages, linear motors have been applied in various fields. In the field of industrial automation, they are used in production line conveying lines, and in various mechanical equipment with lateral or vertical movement, in precision instruments and equipment such as computer magnetic head drive devices, medical instruments, It is well used in aerospace instruments and military weapons. In the existing linear motors, one is fixed by double rows of magnetic rails and the mover coil moves, and the other is fixed by coils and moved by single row of magnetic rails. The disadvantages of the former are: the price of the magnetic track material is high, and the area of the long magnetic track is large, it is easy to inhale foreign matter, the risk is high, and the high-speed movement of the motor requires very high performance of the cable, which is expensive; The cost is high, and its manufacture is complicated, the heat generated during operation is high, and the cooling structure is added, so that the cost of cooling needs to be increased.

Therefore, the prior art still needs to be improved and developed.

Contents of the invention

The technical problem to be solved by the utility model is to provide a single-sided moving magnet linear motor with simple structure, low cost and simple manufacture for the above-mentioned defects of the prior art.

The technical solution adopted by the utility model to solve technical problems is as follows:

A unilateral moving magnet linear motor includes a stator and a mover that moves relative to the stator, wherein the stator includes a single-row track composed of several linearly arranged coil modules, and the mover includes an embedded A U-shaped slider set on the track and movable along the track, the two sides of the U-shaped slider are symmetrically provided with N-pole and S-pole interleaved magnetic dry chips.

The magnetic dry sheets are arranged alternately on the track plates on both sides of the inner side of the U-shaped slider.

The U-shaped slider includes two side plates for carrying the magnetic dry sheet, and a spacer plate arranged at the top of the two side plates for fixing the two side plates.

The magnetic dry sheets are arranged in a staggered manner inside the two side plates of the U-shaped slider.

A permanent magnet sheet is arranged inside the spacer plate of the U-shaped slider.

A three-phase winding is arranged inside the coil module, and the three-phase winding is connected in a delta shape.

A position sensor is arranged on the U-shaped slider.

The two side plates are low carbon steel plates.

The unilateral moving magnet linear motor provided by the utility model has a movable U-shaped slider on the fixed single-row stator coil track, which saves the material of the magnetic stem sheet, and can be powered by an ordinary cable, saving Power consumption also reduces the risk of foreign objects being sucked into the magnetic track, and the cost is low, the structure is simple, and it has broad market prospects.

Description of drawings

Fig. 1 is a three-dimensional schematic diagram of an embodiment of the unilateral moving magnet linear motor of the present invention.

Fig. 2 is a schematic top view of an embodiment of the unilateral moving magnet linear motor of the present invention.

Fig. 3 is a schematic diagram of the arrangement of permanent magnet materials on both sides of the U-shaped slider in the unilateral moving magnet linear motor of the present invention.

Detailed ways

In order to make the purpose, technical solution and advantages of the utility model more clear and definite, the utility model will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

A kind of unilateral type moving magnet linear motor that the embodiment of the present invention provides, as shown in Fig. 1 and Fig. 2, comprises 10 stators, the mover 20 that moves relative to the stator, wherein, described stator comprises several linear arrangements The coil module is composed of a single-row track. The track section has a groove for connection and a fixing column that matches the groove, which can increase the length of the track at any time and increase the flexibility of the linear motor adjustment. The bottom of the track is provided with Auxiliary guide rail 30, the bottom of the auxiliary guide rail is provided with a fixing seat 40 for fixing the rail, and the two sides of the U-shaped slider are symmetrically provided with N poles and S poles interlaced magnetic dry chips, such as Halbeck permanent For magnetic materials, NdFeB permanent magnet materials, magnetic dry sheets made of rare earth permanent magnet materials, etc., the polarities of adjacent permanent magnet materials are opposite, as shown in Figure 3.

Specifically, the magnetic dry sheets are arranged on the track plates on both sides inside the U-shaped slider in a staggered manner. The top of the side plate 201 is used to fix the spacer plate 202 of the two side plates 201, the outer edge of the spacer plate is aligned with the outer surface of the two side plates, specifically, the spacer plate 202 is made of low carbon steel material, The permanent magnetic material forms a magnetic field in the air gap between the two side plates 201 .

Specifically, the magnetic dry sheets are arranged in a staggered manner inside the two side plates 201 of the U-shaped slider.

A permanent magnet is provided inside the spacer plate 202 of the U-shaped slider.

Specifically, the coil module includes three-phase windings and a thermosetting resin casing for fixing the three-phase windings, and each of the three-phase windings is connected in a delta manner. Preferably, the three-phase winding is arranged in a casing made of non-magnetic material with long slots, the three-phase winding and the casing are formed by vacuum infusion of epoxy resin, and the overall volume of the coil module is small, light in weight and high in strength , No eddy current loss, no ripple thrust caused by cogging and electromagnetic attraction between the moving and stator. It has high precision and can withstand high speed and high acceleration.

Specifically, the unilateral moving magnet linear motor is also provided with a power supply device for supplying power to the three-phase winding and a control system for controlling its operation. After the three-phase winding is energized, an induced magnetic field is generated, which is connected to the U-shaped sliding The magnetic field generated by the permanent magnet material on the block repels each other, making the U-shaped slider in a suspended state. Through the setting of the power supply device and the control system, the current in the three-phase winding changes regularly, and the traveling wave magnetic field generated by it makes the The U-shaped slider moves forward continuously, and then the power supply device and the control system are adjusted so that the U-shaped slider can perform reciprocating linear motion along the track.

The U-shaped slider is provided with a position sensor, such as a linear sensor, a photoelectric sensor, a Hall sensor, etc., such as installing a plurality of commonly used grating displacement sensors at different positions of the U-shaped slider, and its working principle is the prior art , which will not be described in detail, it can monitor the speed, position parameters and other information of the mover.

Preferably, the two side plates are low-carbon steel plates, which have extremely low magnetostriction and high magnetic permeability, which is conducive to aggregating the magnetic field and establishing effective magnetic flux.

Each component has multiple holes for matching use, which is convenient for disassembly, installation and maintenance.

It should be understood that the application of the present utility model is not limited to the above examples, and those skilled in the art can improve or change according to the above description, and all these improvements and changes should belong to the protection of the appended claims of the present utility model scope.

Claims (8)

1. single side type moving-magnet linear motor, comprise stator, with respect to the mover of stator movement, it is characterized in that, described stator comprises by what several linearly aligned coil modules formed and is single track, described mover comprises that one is nested on the described track and can along the U-shaped slide block of described rail moving, be symmetrically arranged with the extremely staggered magnetic dry plate of the N utmost point, S on the dual-side of described U-shaped slide block.

2. single side type moving-magnet linear motor according to claim 1 is characterized in that, described magnetic dry plate is crisscross arranged on the track plates on the inboard both sides of described U-shaped slide block.

3. single side type moving-magnet linear motor according to claim 2 is characterized in that, described U-shaped slide block comprises be used to the biside plate that carries described magnetic dry plate, is arranged on the space bar that described biside plate top is used for fixing described biside plate.

4. single side type moving-magnet linear motor according to claim 3 is characterized in that, described magnetic dry plate is crisscross arranged inboard at the biside plate of described U-shaped slide block.

5. single side type moving-magnet linear motor according to claim 3 is characterized in that, is provided with the permanent magnetism sheet in the inboard of the space bar of described U-shaped slide block.

6. single side type moving-magnet linear motor according to claim 1 is characterized in that, is provided with three phase windings in the described coil module, the connection triangular in shape of described three phase windings.

7. single side type moving-magnet linear motor according to claim 1 is characterized in that, is provided with position transducer at described U-shaped slide block.

8. single side type moving-magnet linear motor according to claim 3 is characterized in that, described biside plate is low carbon steel plate.

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