CN112737268A - Linear motor - Google Patents

Abstract

The invention discloses a linear motor, comprising: at least one group of rotor magnetic plates and a plurality of groups of stator motor modules; each stator machine module includes: the coil, the silicon steel sheet, the first bottom plate and the power line; each group the active cell magnetic plate includes: a plurality of groups of NS permanent magnets and a second bottom plate.

Description

Linear motor

Technical Field

The invention relates to an electronic technology, in particular to a linear motor.

Background

The existing linear motor adopts a structure of a permanent magnet stator and a coil rotor, a plurality of magnets of N-level and S-level are arranged on a base plate at equal intervals to serve as the stator, the coil rotor and the permanent magnet stator keep a certain gap through a track, and the voltage and the current of UVW three phases of the coil rotor are controlled to enable the coil rotor and the permanent magnet stator to be in sine waves with a phase difference of 120 degrees.

The structure needs a power line connected to the coil mover, and the quality and the winding speed of the cable for long-distance movement or high-speed movement have great influence on the reality, so that the speed and the service life of the linear motor are limited.

Disclosure of Invention

In view of the above, the present invention is directed to a linear motor.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

an embodiment of the present invention provides a linear motor, including: at least one group of rotor magnetic plates and a plurality of groups of stator motor modules; wherein the content of the first and second substances,

each stator motor module includes: the coil, the silicon steel sheet, the first bottom plate and the power line;

each group the active cell magnetic plate includes: a plurality of groups of NS permanent magnets and a second bottom plate for mounting the plurality of groups of NS permanent magnets.

In the above scheme, the coils of the multiple groups of stator motor modules are used for generating a moving magnetic field after passing through the UVW three-phase sine wave current, so as to push the rotor magnetic plate to move.

In the above-mentioned scheme, every stator motor module includes: a set of UVW coils;

each UVW coil is connected with a UVW power line;

each UVW power line is correspondingly connected with one group of drivers.

In the above scheme, the UVW coil is wound by a single coil.

In the scheme, the rotor magnetic plate is formed by arranging 4 groups of strip-shaped permanent magnets.

In the above scheme, the number of the stator motor modules is at least two.

In the scheme, a length is arranged between every two adjacent stator motor modules at intervals;

the length is integral multiple of the polar distance of the rotor magnetic plate.

In the above scheme, the distance between the stator coil and the rotor magnetic plate is less than 0.5 mm.

In the above scheme, the linear electric motor further includes: magnetic plates installed in parallel through guide rails;

and the drivers are used for respectively controlling the UVW signals of the corresponding motors so as to respectively control the active cells of the magnetic plates.

In the scheme, the number of the stator motor modules is 4;

correspondingly, the linear motor comprises 4 groups of UVW coils.

The embodiment of the invention provides a control method of the linear motor, which comprises the following steps:

step 11, electrifying the linear motor;

step 12, providing a plurality of groups of stator motor modules to push the rotor magnetic plate to move;

and step 12, moving the rotor magnetic plate.

Specifically, give multiunit stator motor module to promote the removal of active cell magnetic sheet, include:

after UVW three-phase sine wave current is provided for coils of a plurality of groups of stator motor modules, a moving magnetic field is generated to push the rotor magnetic plate to move.

Specifically, the method may further include:

through the movement position of the rotor magnetic plate, when the rotor magnetic plate moves to a preset position, the rotor magnetic plate is determined to move to a target;

and determining that the rotor magnetic plate does not move to the motion position, and continuing to supply power to the coils of the plurality of groups of stator motor modules, namely repeating the steps S1 and S2 to enable the rotor magnetic plate to move continuously.

The linear motor provided by the embodiment of the invention comprises: at least one group of rotor magnetic plates and a plurality of groups of stator motor modules; each stator machine module includes: the coil, the silicon steel sheet, the first bottom plate and the power line; each group the active cell magnetic plate includes: a plurality of groups of NS permanent magnets and a second bottom plate for mounting the plurality of groups of NS permanent magnets.

Therefore, according to the embodiment of the invention, the plurality of stator motor modules are arranged, and the rotor magnetic plate is not bound by cables, so that the movement speed of the mechanism can be increased, and the service life of the mechanism can be prolonged.

Drawings

Fig. 1 is a schematic structural view of a conventional linear motor;

fig. 2 is a schematic view of a linear motor according to an embodiment of the present invention;

fig. 3 is a structural diagram of a specific linear motor according to an embodiment of the present invention.

Fig. 4 is a schematic diagram of the distribution of the magnetic force lines of the static field of the single-group motor model according to the embodiment of the invention.

Detailed Description

In various embodiments of the present invention, a linear motor includes: at least one group of rotor magnetic plates and a plurality of groups of stator motor modules; wherein the content of the first and second substances,

each stator motor module includes: the coil, the silicon steel sheet, the first bottom plate and the power line;

each group the active cell magnetic plate includes: a plurality of groups of NS permanent magnets and a second bottom plate for mounting the plurality of groups of NS permanent magnets.

The present invention will be described in further detail with reference to examples.

Fig. 1 is a schematic structural view of a conventional linear motor; as shown in figure 1 of the drawings, in which,

1 represents a permanent magnet magnetic plate of a motor stator, and 2 represents a motor rotor coil; that is, the conventional linear motor employs a motor mover coil and a motor stator permanent magnet body magnetic plate.

The motor rotor coil and the motor stator permanent magnet body magnetic plate are fixedly installed through the guide rail, and a distance of about 0.5mm is kept between the motor rotor coil and the motor stator permanent magnet body magnetic plate.

The control signal provides a moving magnetic field for the motor rotor coil to push the motor rotor coil to move.

This configuration requires cables on the moving motor mover coils, limiting the speed and distance that the motor mover can move.

Fig. 2 is a schematic view of a linear motor according to an embodiment of the present invention; as shown in fig. 2, the linear motor includes: at least one group of rotor magnetic plates and a plurality of groups of stator motor modules; wherein the content of the first and second substances,

each stator motor module includes: the coil, the silicon steel sheet, the first bottom plate and the power line;

each group the active cell magnetic plate includes: a plurality of groups of NS permanent magnets and a second bottom plate for mounting the plurality of groups of NS permanent magnets; namely, the rotor magnetic plate consists of a plurality of groups of NS (north-south pole) permanent magnets and a mounting base plate.

And the coils of the stator motor modules are used for generating a moving magnetic field after UVW three-phase sine wave current passes through the coils so as to push the rotor magnetic plate to move.

Specifically, each stator motor module includes: a set of UVW coils;

each UVW coil is connected with a UVW power line;

each UVW power line is correspondingly connected with one group of drivers.

Specifically, the UVW coil is wound by a single coil.

Specifically, the rotor magnetic plate is formed by arranging 4 groups of strip-shaped permanent magnets.

Specifically, the number of the stator motor modules is at least two;

specifically, a length is arranged between every two adjacent stator motor modules at intervals;

the length is integral multiple of the polar distance of the rotor magnetic plate.

Specifically, the distance between the stator coil and the mover magnetic plate is less than 0.5 mm.

Specifically, the linear motor further includes: magnetic plates are arranged on the erected motor module in parallel through guide rails;

and the drivers are used for respectively controlling the UVW signals of the corresponding motors so as to respectively control the active cells of the magnetic plates.

And silicon steel sheets are arranged outside the 2 groups of UVW coils, and a bottom plate is arranged above the silicon steel sheets.

Specifically, as shown in fig. 2, the number of the stator motor modules is 4;

each stator motor module comprises a group of UVW coils;

correspondingly, the linear motor comprises 4 groups of UVW coils.

Each UVW coil is connected with a power line respectively, and each UVW power line needs a set of driver, because driver and coil all are immobile, can infinitely cascade in theory, through guide rail parallel arrangement magnetic plate on the stator motor module that has erect, through the signal of each UVW of each driver control respectively, can realize the difference control of each magnetic plate active cell.

The number of sets of UVW coils may be increased or decreased as needed, and is not limited to 4 sets of UVW coils. Half of the motor pole distance needs to be ensured among the groups.

Referring to fig. 2, the linear motor specifically includes four stator motor modules, each of which specifically includes: a set of UVW coils;

the UVW coil is wound by a single coil instead of a cross winding;

silicon steel sheets are arranged outside the UVW coil, and a rotor magnetic plate (marked by an iron plate in figure 2) is arranged above the stator motor module.

The rotor magnetic plate is a strong magnetic strip-shaped permanent magnet and is formed by arranging 4 groups.

Specifically, a length is arranged between two adjacent stator motor modules.

In fig. 2, the first base plate serves as a base plate for fixedly mounting the UVW coil;

the first bottom plate can be provided with mounting holes, and the coil and the silicon steel sheet of the stator motor module are mounted through the corresponding holes;

the first bottom plate can be further provided with a wire groove for passing through the power wire.

In fig. 2, the second base plate serves as a base plate for mounting a plurality of sets of NS permanent magnets.

The second base plate may be provided with a track for mounting a plurality of sets of NS permanent magnets.

FIG. 3 is a diagram of each segment of the motor module provided by the embodiment of the present invention; as shown in fig. 3, the linear motor specifically includes: 4 groups of UVW coils (each stator motor module comprises a group of UVW coils);

each UVW coil is connected with a UVW power line; each UVW power line is correspondingly connected with one group of drivers.

The number of the sets of the UVW coils can be increased or decreased according to needs, and is not limited to 4 sets of the UVW coils. Half of the motor pole distance needs to be ensured among the groups.

Fig. 4 is a static field magnetic force line distribution diagram of a single-group motor model established by the embodiment of the invention, and the analysis shows that the electromagnetic design of the motor is reasonable, and the magnetic circuit is not saturated when the magnetic circuit is 6m/s in the working state.

The current of each group of coils is controlled by an external driver, and is input to the coils according to 3-phase sine wave current to generate a magnetic field moving in parallel, so that the mover trolley can be pushed to move for a certain distance. The parallel moving magnetic fields of the multiple sections of coils can be connected through the control of the driver, so that the aim of moving one rotor trolley on a plurality of motors is fulfilled.

In the embodiment of the invention, a new structure that the magnetic plate is used as the rotor and the coil is used as the stator is adopted, the movement speed of the mechanism is well improved, and the service life of the mechanism is prolonged. Original speed is usually controlled within 3 meters of stroke, and speed is within 1.5 meters/second, and 10 meters or even longer distance can easily be realized to new scheme, can accomplish arbitrary length in theory, because the constraint of cable has not been had, and theoretical speed can be to 4 meters/second or even higher.

In addition, in the scheme provided by the embodiment of the invention, each stator motor module is set to be a certain length, 4 groups of UVW coils are adopted in the stator motor module, each UVW coil is respectively connected with a power line, each UVW power line needs a group of drivers, as the drivers and the coils are all fixed, the stator motor module can be in infinite cascade connection theoretically, magnetic plates are arranged on the erected stator motor module in parallel through guide rails, signals of all UVWs are respectively controlled through all the drivers, and the respective control of all the magnetic plate rotors can be realized.

The embodiment of the invention also provides a control method of the linear motor, which comprises the following steps:

step 11, electrifying the linear motor;

step 12, controlling a plurality of groups of stator motor modules to push the rotor magnetic plate to move;

specifically, through giving the coil of multiunit stator motor module, after passing UVW three-phase sine wave electric current, produce the removal magnetic field to promote the active cell magnetic sheet and remove.

And step 12, moving the rotor magnetic plate.

The method may further comprise:

through the movement position of the rotor magnetic plate, when the rotor magnetic plate moves to a preset position, the rotor magnetic plate is determined to move to a target;

and determining that the rotor magnetic plate does not move to the motion position, and continuing to supply power to the coils of the plurality of groups of stator motor modules, namely repeating the steps S1 and S2 to enable the rotor magnetic plate to move continuously.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures.

It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations.

Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly. It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.

It is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, and any modifications, equivalents, improvements, etc. that are within the spirit and principle of the present invention should be included in the present invention.

Claims (10)

1. A linear motor, comprising: at least one group of rotor magnetic plates and a plurality of groups of stator motor modules; wherein the content of the first and second substances,

each stator motor module includes: the coil, the silicon steel sheet, the first bottom plate and the power line;

each group the active cell magnetic plate includes: a plurality of groups of NS permanent magnets and a second bottom plate for mounting the plurality of groups of NS permanent magnets.

2. The linear motor of claim 1, wherein the coils of the plurality of stator motor modules are configured to generate a moving magnetic field to move the mover magnetic plate after passing the UVW three-phase sine wave current.

3. A linear motor according to claim 1, wherein each stator motor module comprises: a set of UVW coils;

each UVW coil is connected with a UVW power line;

each UVW power line is correspondingly connected with one group of drivers.

4. The linear motor of claim 3, wherein the UVW coil is monocoil wound.

5. The linear motor of claim 1, wherein the mover magnetic plate is arranged by 4 sets of bar-shaped permanent magnets.

6. A linear motor according to claim 1, wherein the number of stator motor modules is at least two.

7. The linear motor of claim 6, wherein adjacent stator motor modules are spaced apart a length.

8. A linear motor according to claim 3, wherein the distance between the stator coil and the mover magnetic plate is less than 0.5 mm.

9. The linear motor of claim 1, further comprising: magnetic plates installed in parallel through guide rails;

and the drivers are used for respectively controlling the UVW signals of the corresponding motors so as to respectively control the active cells of the magnetic plates.

10. A linear motor according to claim 1, wherein the number of stator motor modules is 4;

correspondingly, the linear motor comprises 4 groups of UVW coils.

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