CN114900008A - High-response long-life flat linear motor - Google Patents
High-response long-life flat linear motor Download PDFInfo
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- CN114900008A CN114900008A CN202210495287.4A CN202210495287A CN114900008A CN 114900008 A CN114900008 A CN 114900008A CN 202210495287 A CN202210495287 A CN 202210495287A CN 114900008 A CN114900008 A CN 114900008A
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- linear guide
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- linear motor
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- 239000000758 substrate Substances 0.000 description 23
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 16
- 229910052742 iron Inorganic materials 0.000 description 7
- 239000002356 single layer Substances 0.000 description 4
- 230000001133 acceleration Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K41/00—Propulsion systems in which a rigid body is moved along a path due to dynamo-electric interaction between the body and a magnetic field travelling along the path
- H02K41/02—Linear motors; Sectional motors
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K16/00—Machines with more than one rotor or stator
- H02K16/04—Machines with one rotor and two stators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K33/00—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system
- H02K33/12—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with armatures moving in alternate directions by alternate energisation of two coil systems
Abstract
The flat linear motor with high response and long service life comprises a hollow frame, wherein openings are formed in two sides of the hollow frame; the rotor is arranged in the hollow frame in a reciprocating sliding mode along the length direction, two ends of the rotor can extend out of the opening, and the rotor comprises a base plate, a plurality of permanent magnets, a first linear guide rail, a second linear guide rail, a third linear guide rail and a fourth linear guide rail, wherein the permanent magnets are arranged on the front surface and the back surface of the base plate along the length direction in an alternating mode, the first linear guide rail and the second linear guide rail are arranged on the front surface of the base plate along the length direction, and the third linear guide rail and the fourth linear guide rail are arranged on the back surface of the base plate along the length direction; the sliding block is fixedly connected to the hollow frame, is provided with a first stator coil corresponding to the first to fourth linear guide rails, is fixed on the hollow frame and is positioned above the rotor; and a second stator coil fixed to the hollow frame and located below the mover. The flat linear motor is long in service life, and the rotor is lighter and thinner and responds faster while keeping high strength.
Description
Technical Field
The invention relates to the field of linear motors, in particular to a flat linear motor with high response and long service life.
Background
Chinese patent ZL201921554142.7 discloses a symmetrical flat plate linear motor, which consists of a rotor and two stator coils, and the double-side linear motor effectively solves a series of problems caused by overlarge suction force between the stator and the rotor of the single-side linear motor. However, this patent uses composite material bushings at both ends as guide holes, and the mover is guided by the guide holes and reciprocates. The composite material has the characteristic of easy loss, the abrasion is serious after long-time use, and in practice, the fact that the attraction of an upper stator and a lower stator to the rotor is large and absolute balance is difficult to keep is found, the rotor is easy to bend upwards or downwards in the length direction to cause air gap and other parameter changes, therefore, the rotor adopts a structure that two permanent magnet rotors (the permanent magnet rotor comprises a permanent magnet and back iron, namely three layers of back iron) are adhered to the front side and the back side of the back iron to increase the overall strength, but the weight and the volume of the rotor are undoubtedly greatly increased.
However, in heavy-load high-acceleration applications, the mass of the stator part of the linear motor is as small as possible, and the rotor of the conventional linear motor still consumes large inertia force, resulting in insufficient dynamic response performance. How to realize the lightness, thinness and/or high dynamic response of the rotor becomes a problem which needs to be solved urgently.
Therefore, there is a need to develop a high-response and long-life flat linear motor to solve one or more of the above-mentioned problems.
Disclosure of Invention
To solve at least one of the above-mentioned technical problems, according to an aspect of the present invention, there is provided a flat linear motor with high response and long life, comprising:
a hollow frame having openings at both sides;
the rotor is arranged in the hollow frame in a reciprocating sliding mode along the length direction, two ends of the rotor can extend out of the opening, and the rotor comprises a base plate, a plurality of permanent magnets, a first linear guide rail, a second linear guide rail, a third linear guide rail and a fourth linear guide rail, wherein the permanent magnets are arranged on the front surface and the back surface of the base plate along the length direction in an alternating mode, the first linear guide rail and the second linear guide rail are arranged on the front surface of the base plate along the length direction, and the third linear guide rail and the fourth linear guide rail are arranged on the back surface of the base plate along the length direction;
the sliding block is fixedly connected to the hollow frame and is arranged corresponding to the first linear guide rail, the second linear guide rail and the fourth linear guide rail;
the first stator coil is fixed on the hollow frame and positioned above the rotor; and
and a second stator coil fixed to the hollow frame and located below the mover.
According to still another aspect of the present invention, the hollow frame includes a first coil fixing plate, a second coil fixing plate, a first support block, a second support block, a first end plate, and a second end plate, the openings being provided to the first end plate and the second end plate, the first coil fixing plate and the second coil fixing plate being connected between the first end plate and the second end plate, the first stator coil being fixed to the first coil fixing plate, the second stator coil being fixed to the second coil fixing plate, the first support block being connected between a first side of the first coil fixing plate and a first side of the second coil fixing plate, and the second support block being connected between a second side of the first coil fixing plate and a second side of the second coil fixing plate.
According to still another aspect of the present invention, the high-response long-life flat linear motor further includes a position sensor mounted to the hollow frame through a bracket, the position sensor sensing position information of the mover.
According to another aspect of the invention, the permanent magnets are symmetrically attached to the front and back surfaces of the substrate, the permanent magnets on the same surface are arranged along the length direction of the mover, and the polarities of two adjacent permanent magnets are opposite and the distances between the two adjacent permanent magnets are equal.
According to still another aspect of the present invention, the first and second stator coils are either a cored coil or an coreless coil, and are symmetrically disposed at upper and lower sides of the mover while maintaining a predetermined air gap with the mover.
According to the invention, the first stator coil and the second stator coil are connected with three-phase alternating current to generate two travelling-wave magnetic fields, and the rotor moves linearly along the sliding block under the combined action of the two travelling-wave magnetic fields.
According to another aspect of the invention, the high-response and long-life flat-plate linear motor further comprises a driver, the driver is used for synchronously controlling and supplying three-phase alternating current which is synchronously changed to the first stator coil and the second stator coil to generate traveling wave magnetic fields in the same direction, and the permanent magnets on the front side and the back side of the rotor are subjected to the same magnetic field action relative to the direction of the stator to realize double thrust of the linear motor.
According to another aspect of the present invention, the first support block is a plurality of first support blocks, and the plurality of first support blocks are arranged at intervals between the first end plate and the second end plate.
According to another aspect of the present invention, the second support block is a plurality of second support blocks, and the plurality of second support blocks are spaced between the first end plate and the second end plate.
According to still another aspect of the present invention, the mover is composed of the base plate, a plurality of permanent magnets whose magnetic poles are alternately arranged, and first to fourth linear guides.
The invention can obtain one or more of the following technical effects:
because the linear guide rail in the length direction is arranged, the attraction force applied to the rotor by the upper stator and the lower stator is uniformly transmitted and dispersed to the linear guide rail, the sliding block and the frame, and the rotor is still fully kept not to be bent/deformed in the length direction under the condition that only a single-layer back iron (single-layer base plate) is arranged, so that the number and the thickness of the back iron can be reduced, the quality of the rotor is greatly reduced, and the response speed is improved;
compared with a symmetrical flat linear motor in the prior art (ZL201921554142.7), the quality and the thickness of the rotor can be reduced by about 3/4, a more compact structure is realized, and deformation of the rotor is avoided;
bending/deformation of the rotor in the length direction is avoided, and air gap parameters are kept stable;
the pressure born by the linear guide rail is sharply reduced through the supporting block, and the service life is effectively prolonged.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a schematic view of a high-response long-life flat linear motor according to a preferred embodiment of the present invention.
Fig. 2 is a schematic view showing a positional relationship among the first stator coil, the second stator coil, the substrate, and the permanent magnet in fig. 1.
Fig. 3 is a schematic diagram of a rotor and a slider of a high-response long-life flat linear motor according to a preferred embodiment of the present invention.
Fig. 4 is a schematic diagram illustrating a positional relationship between the first stator coil and the first coil fixing plate in fig. 1.
Fig. 5 is a schematic diagram of driving signals of a driver of a high-response long-life flat linear motor according to a preferred embodiment of the present invention.
Detailed Description
The best mode for carrying out the present invention will be described in detail with reference to the accompanying drawings, wherein the detailed description is for the purpose of illustrating the invention in detail, and is not to be construed as limiting the invention, as various changes and modifications can be made therein without departing from the spirit and scope thereof, which are intended to be encompassed within the appended claims.
Example 1
According to a preferred embodiment of the present invention, referring to fig. 1 to 4, there is provided a flat plate linear motor with high response and long life, characterized by comprising:
a hollow frame having openings at both sides;
a mover which is provided in the hollow frame so as to be slidable back and forth in a longitudinal direction and both ends of which can protrude from the opening, the mover including a base plate 3, permanent magnets 2 which are installed on both front and back surfaces of the base plate 3 in the longitudinal direction and are alternately arranged, first and second linear guides 5 and 6 which are arranged on the front surface of the base plate 3 in the longitudinal direction, and third and fourth linear guides 7 and 8 which are arranged on the back surface of the base plate 3 in the longitudinal direction;
the sliding block 9 is fixedly connected to the hollow frame and is arranged corresponding to the first to fourth linear guide rails 8;
the first stator coil 1 is fixed on the hollow frame and is positioned above the rotor; and
and a second stator coil 4 fixed to the hollow frame and located below the mover.
According to still another preferred embodiment of the present invention, the hollow frame includes a first coil fixing plate 10, a second coil fixing plate 11, a first supporting block 12, a second supporting block 12, a first end plate 13 and a second end plate 14, the openings are provided at the first end plate 13 and the second end plate 14, the first coil fixing plate 10 and the second coil fixing plate 11 are connected between the first end plate 13 and the second end plate 14, the first stator coil 1 is fixed to the first coil fixing plate 10, the second stator coil 4 is fixed to the second coil fixing plate 11, the first supporting block 12 is connected between a first side of the first coil fixing plate 10 and a first side of the second coil fixing plate 11, and the second supporting block 12 is connected between a second side of the first coil fixing plate 10 and a second side of the second coil fixing plate 11.
Preferably, a first limit block 16 and a second limit block 17 are respectively disposed at two ends of the mover and used for limiting the stroke of the mover.
According to still another preferred embodiment of the present invention, the high-response long-life flat linear motor further includes a position sensor mounted to the hollow frame through the bracket 15, the position sensor sensing position information of the mover.
According to another preferred embodiment of the present invention, the permanent magnets 2 are symmetrically attached to the front and back surfaces of the substrate 3, the permanent magnets 2 located on the same surface are arranged along the length direction of the mover, and the polarities of two adjacent permanent magnets 2 are opposite and the distances between the two adjacent permanent magnets 2 are equal.
According to still another preferred embodiment of the present invention, the first and second stator coils 1 and 4 are coils with iron cores or coils without iron cores, and the first and second stator coils 1 and 4 are symmetrically disposed at upper and lower sides of the mover while maintaining a predetermined air gap with the mover.
According to a further preferred embodiment of the present invention, the first stator coil 1 and the second stator coil 4 are connected with three-phase alternating current to generate two traveling-wave magnetic fields, and the mover moves linearly along the slider 9 under the combined action of the two traveling-wave magnetic fields.
According to another preferred embodiment of the present invention, the high-response and long-life flat-plate linear motor further comprises a driver for synchronously controlling and supplying synchronously changing three-phase alternating currents to the first stator coil 1 and the second stator coil 4 to generate traveling wave magnetic fields in the same direction, and the permanent magnets 2 on the front side and the back side of the mover are subjected to the same magnetic field relative to the stator direction to realize double thrust of the linear motor.
According to another preferred embodiment of the present invention, the first supporting block 12 is plural, and the plural first supporting blocks 12 are arranged at intervals between the first end plate 13 and the second end plate 14.
According to another preferred embodiment of the present invention, the second supporting block 12 is plural, and the plural second supporting blocks 12 are arranged at intervals between the first end plate 13 and the second end plate 14.
According to still another preferred embodiment of the present invention, the mover is composed of the base plate 3, a plurality of permanent magnets 2 having magnetic poles alternately arranged, and first to fourth linear guides 8.
There is also provided in accordance with still another preferred embodiment of the present invention a high-response long-life flat linear motor including a primary symmetrically arranged double coil, a secondary double-sided adhesive sheet, a motor frame, and a position sensor.
Preferably, the secondary comprises a substrate 3 and a plurality of permanent magnets 2 attached to the front and back surfaces of the substrate 3, the permanent magnets 2 are symmetrically attached to the front and back surfaces of the substrate 3, and two adjacent permanent magnets 2 are opposite in polarity and equal in distance.
Preferably, the primary includes a first coil and a second coil, the first coil and the second coil are not limited to a cored coil and a coreless coil; the first coil and the second coil are symmetrically arranged on two sides of the double-faced magnetic plate as a stator. The first coil and the second coil are connected with three-phase alternating current to generate two traveling wave magnetic fields, and the secondary double-faced magnetic plate moves linearly and generates thrust under the action of the traveling wave magnetic fields.
Preferably, the frame comprises a coil fixing plate, a supporting block 12, an end plate and linear guide rails, wherein a first linear guide rail 5, a second linear guide rail 6, a third linear guide rail 7 and a fourth linear guide rail 8 are arranged on the front and back sides of the edges of the two sides of the double-sided adhesive substrate 3, each of the four linear guide rails is provided with N1 sliding blocks, and preferably, N1 is 2, 3, 4 or more. The four linear guide rails are all parallel to each other.
Preferably, the first coil is installed on one side of a first coil fixing plate 10, the second coil is installed on one side of a second coil fixing plate 11, the supporting blocks 12 are assembled on both sides of the first coil fixing plate 10 and the second coil fixing plate 11, the supporting blocks 12 have N2 groups in total, and are symmetrically installed between the first coil fixing plate 10 and the second coil fixing plate 11; preferably, the N2 is 2, 3, 4 or more.
Preferably, all the sliding blocks on the four guide rails are fixedly connected with the first coil fixing plate 10 and the second coil fixing plate 11 through screws, and a first end plate 13 and a second end plate 14 are arranged at two ends of the first coil fixing plate 10 and the second coil fixing plate 11; the air gap between the double-sided magnetic sheet and the first and second coils is determined by the relative positions of the first coil mounting plate, the second coil mounting plate, the supporting block 12 and the substrate 3.
Preferably, the length of the double-sided magnet-sticking plate of the mover is determined by the stroke of the linear motor, a position sensor support 15 is installed on one side of the substrate 3, a position sensor is installed on the position sensor support 15 and used for providing position information feedback, and the double-sided magnet-sticking plate can drive the first linear guide rail 5, the second linear guide rail 6, the third linear guide rail 7 and the fourth linear guide rail 8 to linearly reciprocate along the guide direction of the slider.
Preferably, the linear motor is characterized in that the first coil and the second coil are synchronously controlled by a driver, three-phase alternating currents which change synchronously are introduced into the first coil and the second coil by the driver to generate traveling wave magnetic fields in the same direction, and the permanent magnets 2 on the positive side and the negative side of the rotor are acted by the same magnetic field in the direction opposite to the stator to achieve the purpose of doubling the thrust of the linear motor.
Advantageously, the double-sided magnet and double-coil symmetrical structure is adopted, so that the thrust of the linear motor is doubled, meanwhile, the symmetrical structure can effectively balance the huge attraction between the single-sided coil and the permanent magnet 2, the rigidity requirement of the substrate 3 for mounting the permanent magnet 2 is obviously reduced, the light and thin substrate 3 can be used for mounting the permanent magnet 2, and the dynamic response and the stability of the linear motor are greatly improved. Furthermore, the linear motor frame can sharply reduce the positive pressure of the linear motion pair on the basis of a symmetrical structure, and realizes long service life and maintenance-free. In addition, based on the structural design of the linear motor, the linear motor with higher thrust, high response and long service life can be manufactured.
Preferably, the linear motor adopts double coils as a stator, the rotor double-sided magnetic-pasted plates linearly move between two groups of symmetrically arranged coils, the double-sided magnetic-pasted plates adopt an ultrathin structure, the quality of rotor parts is effectively reduced on the basis of doubling thrust, and the dynamic response and the stability of the linear motor are greatly improved. In addition, the linear motor frame can sharply reduce the positive pressure of the linear motion pair on the basis of a symmetrical structure, and realizes long service life and maintenance-free.
There is also provided in accordance with still another preferred embodiment of the present invention a high-response long-life flat linear motor including a primary double-sided magnet sheet, a secondary symmetrically arranged double coil, a motor frame, and a position sensor.
Preferably, the permanent magnets 2 are symmetrically adhered to the front side and the back side of the substrate 3 through special glue, and the permanent magnets 2 are equally spaced; the first linear guide rail 5, the second linear guide rail 6, the third linear guide rail 7 and the fourth linear guide rail 8 are fixedly connected with the substrate through bolts, two sliders 9 are arranged on each of the first linear guide rail 5, the second linear guide rail 6, the third linear guide rail 7 and the fourth linear guide rail 8, the first coil 1 is fixedly connected with the first coil fixing plate 10 through bolts, the second coil 4 is fixedly connected with the second coil fixing plate 11 through bolts, the supporting block 12 is fixedly connected between the first coil fixing plate 10 and the second coil fixing plate 11 through bolts, and the sliders are fixedly connected with the coil fixing plates on the corresponding sides through bolts; thus, the air gap in the present invention was determined to be 0.6mm to 1 mm.
Preferably, the upper and lower surfaces of the permanent magnet are respectively an N pole or an S pole, the polarities of two adjacent permanent magnets are opposite, the distance between two adjacent permanent magnets having different magnetic poles is 22.5mm, and the distance between two adjacent permanent magnets having the same magnetic pole is 45 mm.
Preferably, the sensor support 15 is fixedly connected with the substrate 3 through bolts, a position sensor (not shown) is arranged on the sensor support and used for providing position information feedback, and the first limiting block 16 and the second limiting block 17 are fixedly connected with the two ends of the substrate 3 through bolts and used for limiting the movable range of the substrate 3.
Preferably, a variable three-phase alternating current is introduced into the first coil 1 and the second coil 4, and under the action of the alternating current, the first coil 1 and the second coil 4 generate a specific travelling magnetic field. The permanent magnet 2 can receive thrust relative to the direction of the stator in the travelling magnetic field, and the thrust direction generated by the first coil 1 is the same as the thrust direction generated by the second coil 4, so that the linear motor can output double thrust; the linear motor is driven by a driver for square wave position control, and referring to fig. 5, a motor square wave motion deceleration point 18 and a motor square wave motion acceleration point 19 represent the acceleration and deceleration capacity of the linear motor, and the shorter the time required for the linear motor to accelerate or decelerate to a certain specified speed, the better the dynamic response of the linear motor.
Preferably, the substrate 3 adopts an ultra-thin design, so that the overall quality of the mover part is obviously reduced compared with that of a traditional flat motor, and meanwhile, the thrust sample of the linear motor is considered, so that the acceleration of the linear motor is improved by 2-3 times compared with that of the traditional linear motor, and the dynamic performance and the stability of the motor are obviously improved.
According to another preferred embodiment of the present invention, there is provided a high-response long-life flat linear motor including a primary symmetrically-arranged double coil, a secondary double-sided magnetic sheet, a motor frame, and a position sensor, wherein: the primary symmetrically-arranged double coils of the linear motor comprise a first coil and a second coil which are used as stators, the secondary double-faced magnetic plate is used as a rotor, and the two stator coils are symmetrically arranged on two sides of the rotor double-faced magnetic plate; the first coil is fixedly connected with the first coil fixing plate, and the second coil is fixedly connected with the second coil fixing plate; the double-sided magnetic plate is provided with a linear guide rail, a sliding block on the linear guide rail is fixedly connected with the first coil fixing plate and the second coil fixing plate, and the first coil fixing plate and the second coil fixing plate are fixedly connected through the supporting block; and a reading head and a ruler of the position sensor are respectively fixed on the coil fixing plate and the double-sided magnetic plate.
According to another preferred embodiment of the present invention, the secondary double-sided magnetic plate comprises a substrate and a plurality of permanent magnets attached to the front and back surfaces of the substrate, wherein the permanent magnets are symmetrically attached to the front and back surfaces of the substrate, and two adjacent permanent magnets have opposite polarities and equal intervals;
according to still another preferred embodiment of the present invention, the primary includes a first coil and a second coil, and the first coil and the second coil are not limited to a cored coil and a coreless coil; the first coil and the second coil are symmetrically arranged on two sides of the double-faced magnetic plate as a stator. The first coil and the second coil are connected with three-phase alternating current to generate two traveling wave magnetic fields, and the secondary double-faced magnetic plate moves linearly and generates thrust under the action of the traveling wave magnetic fields.
According to another preferred embodiment of the present invention, the frame comprises a coil fixing plate, a support block, an end plate and linear guide rails, wherein the front and back sides of the two side edges of the double-sided tape substrate are provided with a first linear guide rail, a second linear guide rail, a third linear guide rail and a fourth linear guide rail, and each of the four linear guide rails is provided with N1 sliding blocks, preferably, N1 is 2, 3, 4 or more. The four linear guide rails are all parallel to each other.
According to another preferred embodiment of the present invention, the first coil is mounted on one side of a first coil fixing plate, the second coil is mounted on one side of a second coil fixing plate, the supporting blocks are mounted on both sides of the first coil fixing plate and the second coil fixing plate, the supporting blocks have N2 groups, and the supporting blocks are symmetrically mounted between the first coil fixing plate and the second coil fixing plate; preferably, the N2 is 2, 3, 4 or more.
According to another preferred embodiment of the present invention, all the sliding blocks on the four guide rails are fixedly connected to the first coil fixing plate and the second coil fixing plate by screws, and a first end plate and a second end plate are disposed at two ends of the first coil fixing plate and the second coil fixing plate; the air gap between the double-sided magnetic-pasting plate and the first coil and the second coil is determined by the relative positions of the first coil mounting plate, the second coil mounting plate, the supporting block and the substrate.
According to another preferred embodiment of the present invention, the length of the double-sided magnetic plate of the rotor is determined by the stroke of the linear motor, a position sensor holder is mounted on one side of the substrate, a position sensor is mounted on the position sensor holder for providing position information feedback, and the double-sided magnetic plate can drive the first linear guide rail, the second linear guide rail, the third linear guide rail and the fourth linear guide rail to linearly reciprocate along the guide of the slider.
The invention can obtain at least one or more of the following technical effects:
because the linear guide rail in the length direction is arranged, the attraction force applied to the rotor by the upper stator and the lower stator is uniformly transmitted and dispersed to the linear guide rail, the sliding block and the frame, and the rotor is still fully kept not to be bent/deformed in the length direction under the condition that only a single-layer back iron (single-layer base plate) is arranged, so that the number and the thickness of the back iron can be reduced, the quality of the rotor is greatly reduced, and the response speed is improved;
compared with the symmetrical flat linear motor in the prior art, the quality and the thickness of the rotor can be reduced by about 3/4, a more compact structure is realized, and the deformation of the rotor is avoided;
bending/deformation of the rotor in the length direction is avoided, and air gap parameters are kept stable;
the pressure born by the linear guide rail is sharply reduced through the supporting block, and the service life is effectively prolonged.
It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. A high-response long-life flat linear motor is characterized by comprising:
a hollow frame having openings at both sides;
the rotor is arranged in the hollow frame in a reciprocating sliding mode along the length direction, two ends of the rotor can extend out of the opening, and the rotor comprises a base plate, a plurality of permanent magnets, a first linear guide rail, a second linear guide rail, a third linear guide rail and a fourth linear guide rail, wherein the permanent magnets are arranged on the front surface and the back surface of the base plate along the length direction in an alternating mode, the first linear guide rail and the second linear guide rail are arranged on the front surface of the base plate along the length direction, and the third linear guide rail and the fourth linear guide rail are arranged on the back surface of the base plate along the length direction;
the sliding block is fixedly connected to the hollow frame and is arranged corresponding to the first linear guide rail, the second linear guide rail and the fourth linear guide rail;
the first stator coil is fixed on the hollow frame and positioned above the rotor; and
and a second stator coil fixed to the hollow frame and located below the mover.
2. The high-response long-life flat linear motor of claim 1, wherein the hollow frame comprises a first coil fixing plate, a second coil fixing plate, a first support block, a second support block, a first end plate and a second end plate, the opening is provided in the first end plate and the second end plate, the first coil fixing plate and the second coil fixing plate are connected between the first end plate and the second end plate, the first stator coil is fixed to the first coil fixing plate, the second stator coil is fixed to the second coil fixing plate, the first support block is connected between a first side of the first coil fixing plate and a first side of the second coil fixing plate, and the second support block is connected between a second side of the first coil fixing plate and a second side of the second coil fixing plate.
3. The high-response long-life flat plate linear motor of claim 1, further comprising a position sensor mounted to the hollow frame through a bracket, the position sensor sensing position information of the mover.
4. The high-response long-life flat linear motor according to any one of claims 1 to 3, wherein the permanent magnets are symmetrically attached to the front and back surfaces of the base plate, the permanent magnets on the same surface are arranged along the length direction of the mover, and the polarities of the two adjacent permanent magnets are opposite and the intervals between the two adjacent permanent magnets are equal.
5. The high-response long-life flat linear motor according to claim 4, wherein the first and second stator coils are either cored coils or non-cored coils, and are symmetrically disposed at upper and lower sides of the mover while maintaining a predetermined air gap with the mover.
6. The high-response long-life flat-plate linear motor according to claim 4, wherein the first stator coil and the second stator coil are connected with three-phase alternating current to generate two traveling-wave magnetic fields, and the mover moves linearly along the slider under the combined action of the two traveling-wave magnetic fields.
7. The high-response long-life flat plate linear motor according to claim 4, further comprising a driver for synchronously controlling and supplying three-phase alternating currents which are synchronously changed to the first stator coil and the second stator coil to generate traveling wave magnetic fields in the same direction, wherein the permanent magnets on the front side and the back side of the rotor are subjected to the same magnetic field relative to the direction of the stator to realize double thrust of the linear motor.
8. The high-response long-life flat linear motor of claim 2, wherein said first support block is plural, and plural first support blocks are arranged at intervals between the first end plate and the second end plate.
9. The high response long life flat linear motor of claim 8 wherein said second support block is a plurality of second support blocks spaced between said first end plate and said second end plate.
10. The high-response long-life flat plate linear motor of claim 4, wherein said mover is composed of said base plate, a plurality of permanent magnets whose magnetic poles are alternately arranged, first to fourth linear guides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202210495287.4A CN114900008A (en) | 2022-05-07 | 2022-05-07 | High-response long-life flat linear motor |
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| CN202210495287.4A CN114900008A (en) | 2022-05-07 | 2022-05-07 | High-response long-life flat linear motor |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| JP2002034231A (en) * | 2000-07-19 | 2002-01-31 | Yaskawa Electric Corp | Linear slider |
| US20060012252A1 (en) * | 2004-07-16 | 2006-01-19 | Shin-Etsu Chemical Co., Ltd. | Linear motor for use in machine tool |
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| US20180301968A1 (en) * | 2015-11-16 | 2018-10-18 | Jiangsu University | Double stator permanent magnet cursor linear motor and design method for increasing magnetic field modulation effect |
| US20180248498A1 (en) * | 2017-02-27 | 2018-08-30 | Kone Corporation | Method for levitation control of a linear motor, method for measuring a position of a linear motor, inductive sensing device, and elevator system |
| WO2020140178A1 (en) * | 2018-12-30 | 2020-07-09 | 中国科学院沈阳自动化研究所 | On-orbit launching apparatus |
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