CN116566153B - Magnetic field modulation disc type PCB motor and application thereof - Google Patents
Magnetic field modulation disc type PCB motor and application thereof Download PDFInfo
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- CN116566153B CN116566153B CN202310560660.4A CN202310560660A CN116566153B CN 116566153 B CN116566153 B CN 116566153B CN 202310560660 A CN202310560660 A CN 202310560660A CN 116566153 B CN116566153 B CN 116566153B
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- 238000004804 winding Methods 0.000 claims abstract description 41
- 230000005284 excitation Effects 0.000 claims abstract description 32
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- 150000003071 polychlorinated biphenyls Chemical class 0.000 claims description 4
- 229910000976 Electrical steel Inorganic materials 0.000 claims description 3
- 230000009471 action Effects 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 239000003822 epoxy resin Substances 0.000 claims description 3
- 230000006698 induction Effects 0.000 claims description 3
- 230000007935 neutral effect Effects 0.000 claims description 3
- 229920000647 polyepoxide Polymers 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 11
- 238000005516 engineering process Methods 0.000 abstract description 5
- 241000196324 Embryophyta Species 0.000 description 7
- 238000005520 cutting process Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 230000004907 flux Effects 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 229910001172 neodymium magnet Inorganic materials 0.000 description 3
- QMUDLTGWHILKHH-UHFFFAOYSA-N 1,2,5-trichloro-3-(3,5-dichlorophenyl)benzene Chemical compound ClC1=CC(Cl)=CC(C=2C(=C(Cl)C=C(Cl)C=2)Cl)=C1 QMUDLTGWHILKHH-UHFFFAOYSA-N 0.000 description 2
- QJVKUMXDEUEQLH-UHFFFAOYSA-N [B].[Fe].[Nd] Chemical compound [B].[Fe].[Nd] QJVKUMXDEUEQLH-UHFFFAOYSA-N 0.000 description 2
- 230000005501 phase interface Effects 0.000 description 2
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Classifications
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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
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01D—HARVESTING; MOWING
- A01D34/00—Mowers; Mowing apparatus of harvesters
- A01D34/01—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus
- A01D34/412—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters
- A01D34/416—Flexible line cutters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2793—Rotors axially facing stators
- H02K1/2795—Rotors axially facing stators the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2796—Rotors axially facing stators the rotor consisting of two or more circumferentially positioned magnets where both axial sides of the rotor face a stator
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/26—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors consisting of printed conductors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/28—Layout of windings or of connections between windings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
- H02K5/173—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
- H02K5/1737—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings radially supporting the rotor around a fixed spindle; radially supporting the rotor directly
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2201/00—Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
- H02K2201/03—Machines characterised by aspects of the air-gap between rotor and stator
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
Abstract
The invention discloses a magnetic field modulation disc type PCB motor and application thereof, which belong to the field of motors, and comprise a shell consisting of an upper end cover and a lower end cover, wherein a stator assembly and a rotor assembly are arranged in the shell, the inner side of the rotor assembly extends out of the shell through an output rotating shaft and is rotationally connected with the shell, the output rotating shaft is rotationally connected with the stator assembly through a deep groove ball bearing, the rotor assembly is a magnetic modulation disc rotor, the stator assembly comprises a direct current excitation PCB stator and a three-phase armature PCB stator which are arranged on two sides of the magnetic modulation disc rotor, a primary air gap is reserved between the direct current excitation PCB stator and the magnetic modulation disc rotor, and a secondary air gap is reserved between the magnetic modulation disc rotor and the three-phase armature PCB stator. The invention adopts the magnetic field modulation disc type PCB motor and the application thereof, the direct current excitation PCB stator is used for replacing the permanent magnet, the three-phase armature PCB stator is used for replacing the winding iron core structure, and the PCB technology is used for replacing the permanent magnet and the winding iron core structure, so that the volume and the mass of the motor are reduced.
Description
Technical Field
The invention relates to the technical field of motors, in particular to a magnetic field modulation disc type PCB motor and application thereof.
Background
With the continuous promotion of social economy and the continuous development of scientific technology, the motor plays an increasingly important role in industrial and agricultural production and daily life of people. In the prior art, an inductor is formed by winding on a stator core, and when current flows on the winding, a magnetic field on an internal rotor and the current are induced to drive the rotor to rotate.
The magnetic field modulation motor also has radial magnetic flux and axial magnetic flux, and compared with the radial magnetic flux motor, the axial magnetic flux disc motor has the characteristics of simple structure, small axial size, small mass and moment of inertia, large low-speed torque and the like. But most of the existing magnetic field modulation disc type motors adopt neodymium-iron-boron permanent magnets, stator windings are wound on iron cores, and the iron core loss is higher while the motor quality is improved.
The motor structure has the following defects: 1. the stator winding is manufactured by winding a wire on an iron core, so that the stator winding is complicated to process; 2. because of the requirement of output power, the number of turns of the stator winding is more, and the whole volume and the mass of the motor are larger; 3. the use of the NdFeB permanent magnet not only increases the quality of the motor, but also consumes natural resources such as rare earth materials and the like.
Meanwhile, the mower is known to be mechanical equipment for trimming lawns and vegetation, and the traditional engine type mower has the disadvantages of complex transmission structure, low transmission efficiency, large mass, large volume and the like in terms of a power source. From the type of the cutter, the existing mower mainly adopts a cutter disc type, a blade type, a flail knife type and other rigid cutters, when the ground is uneven, the rigid cutters touch hard objects such as stones and the like to easily damage the cutter edges, even safety accidents occur, and the ground adaptability and the safety performance are limited. In view of mowing efficiency, most mowers are of a single-cutter or double-cutter structure, and in the case of large-area lawns, especially when weeds are transverse, the mowing efficiency of the existing mowers is low.
Disclosure of Invention
In order to solve the problems, the invention provides a magnetic field modulation disc type PCB motor and application thereof, wherein a permanent magnet is replaced by a DC excitation PCB stator, a winding iron core structure is replaced by a three-phase armature PCB stator, and the volume and the mass of the motor are reduced by adopting a PCB technology to replace the permanent magnet and the winding iron core structure.
In order to achieve the above purpose, the invention provides a magnetic field modulation disc type PCB motor, which comprises a shell composed of an upper end cover and a lower end cover, wherein a stator assembly and a rotor assembly are arranged in the shell, the inner side of the rotor assembly extends out of the shell through an output rotating shaft and is rotationally connected with the shell, the output rotating shaft is rotationally connected with the stator assembly through a deep groove ball bearing, the rotor assembly is a magnetic modulation disc rotor, the stator assembly comprises a direct current excitation PCB stator and a three-phase armature PCB stator which are arranged at two sides of the magnetic modulation disc rotor, a primary air gap is reserved between the direct current excitation PCB stator and the magnetic modulation disc rotor, and a secondary air gap is reserved between the magnetic modulation disc rotor and the three-phase armature PCB stator;
when direct current is supplied to the direct current excitation PCB stator, a harmonic magnetic field is generated in the primary air gap, three-phase alternating current is supplied to the three-phase armature PCB stator, a rotating magnetic field is generated in the secondary air gap, the rotating magnetic field is modulated by the modulating disc rotor, a harmonic magnetic field with the same pole pair number as the harmonic magnetic field generated by the direct current excitation PCB stator is formed in the primary air gap, the two harmonic magnetic fields are coupled, and the modulating disc rotor rotates under the action of the coupling magnetic field, so that the output rotating shaft can be driven to rotate.
Preferably, the direct current excitation PCB stator comprises a plurality of layers of first PCB boards, excitation windings are distributed on the first PCB boards in a mode of winding through a combined printed circuit, direct current is input into the excitation windings, and an induction magnetic field with N, S poles distributed alternately is generated.
Preferably, the exciting winding comprises a plurality of exciting coils which are correspondingly distributed on the first PCB in multiple layers and are electrically connected in sequence;
corresponding exciting coils on the first PCB on different layers are communicated with adjacent exciting coils, and the current directions of the two adjacent exciting coils are opposite.
Preferably, the three-phase armature PCB stator comprises a plurality of layers of second PCB boards, armature windings are distributed on the second PCB boards in a combined type printed circuit winding mode, and three-phase alternating current is fed into the armature windings to generate a rotating magnetic field.
Preferably, the armature winding adopts a star connection method, and comprises three groups of exciting coils which are correspondingly distributed on the multi-layer second PCB board and are electrically connected with each other in sequence between layers, one end of each of the three groups of exciting coils is respectively connected with an A phase, a B phase and a C phase of three-phase alternating current, and the other end of each of the three groups of exciting coils is connected with a neutral point through a middle node;
each group of exciting coils comprises two exciting coils which are oppositely arranged and electrically connected;
each exciting coil adopts spiral or wave winding between the second PCBs of the same layer.
Preferably, the magnetic regulating disc rotor comprises a retainer, a plurality of placing grooves are uniformly formed in the outer circumferential side of the retainer, magnetic conducting blocks and non-magnetic conducting blocks are alternately arranged in the placing grooves, circumferential positioning is achieved through interference fit between the inner side of the retainer and the output rotating shaft, and axial positioning is achieved through connection of the elastic check ring and the output rotating shaft on the inner side of the retainer.
Preferably, the magnetic conducting blocks are made of silicon steel, the non-magnetic conducting blocks are made of epoxy resin, and the number, shape and size of the magnetic conducting blocks and the non-magnetic conducting blocks are the same.
Preferably, the pole pair number of the harmonic magnetic field generated after the direct-current excitation PCB stator is electrified is set to be represented by P1, the pole pair number of the harmonic magnetic field generated after the three-phase armature PCB stator is electrified is set to be represented by P2, the numbers of the magnetic conduction blocks and the non-magnetic conduction blocks are respectively represented by Z, and the three satisfy the number relation formula: z=p1+p2.
The application of the magnetic field modulation disc type PCB motor is used for a rope cutter, the rope cutter comprises a magnetic field modulation disc type PCB motor and a rope disc, the center of the rope disc is in threaded connection with an output rotating shaft of the magnetic field modulation disc type PCB motor, and the outer circumference side of the rope disc is connected with a flexible nylon rope;
the thread rotation direction of the rope disc and the output rotating shaft is the same as the rotation direction of the output rotating shaft.
Preferably, the rope cutters are arranged on the walking bracket in parallel or perpendicular to each other;
the walking bracket comprises a transverse pushing rod and a plurality of L-shaped connecting rods, one ends of the L-shaped connecting rods are fixedly connected with the same side of the transverse pushing rod, and the bottom sides of the other ends of the L-shaped connecting rods are respectively and rotatably connected with walking wheels; one end of the L-shaped connecting rod, which is close to the travelling wheel, is provided with a rope type cutter.
The invention has the following beneficial effects:
1. the direct-current excitation PCB stator is used for replacing the permanent magnet, the three-phase armature PCB stator is used for replacing the winding iron core structure, and the PCB technology is used for replacing the permanent magnet and the winding iron core structure, so that the purposes of light weight, compactness and high efficiency of the motor are achieved, and the neodymium iron boron permanent magnet is not used, so that rare earth resources are saved.
2. The invention relates to a mowing mechanism which adopts a magnetic field modulation disc type PCB motor to directly drive a rope throwing type cutter. The rope throwing type flexible nylon rope has the unique advantages of compact structure, easy replacement, strong ground adaptability, high safety performance and the like, is suitable for a small integral handheld mower, and has the characteristics of electric drive, light weight and compactness.
3. The invention relates to a mowing mechanism, which is provided with a plurality of distributed cutting knife assemblies through a walking bracket, wherein each cutting knife assembly is independently driven by a single motor, so that a transmission system of the distributed structure is greatly simplified, and the mowing mechanism has the characteristics of quick response, compact structure, wide operation range and multiple application scenes.
The technical scheme of the invention is further described in detail through the drawings and the embodiments.
Drawings
Fig. 1 is a schematic diagram of an internal structure of a magnetic field modulation disc type PCB motor of the present invention;
fig. 2 is a schematic diagram of a rotor assembly of a magnetic field modulation disc type PCB motor according to the present invention;
fig. 3 is a schematic diagram of a direct-current excitation PCB stator of a magnetic field modulation disc type PCB motor according to the present invention;
fig. 4 is a schematic diagram of a three-phase armature PCB stator structure of a magnetic field modulation disc type PCB motor according to the present invention;
FIG. 5 is a schematic diagram of a magnetic field modulation disk type PCB motor of the present invention;
FIG. 6 is an application assembly diagram of a magnetic field modulation disk type PCB motor of the present invention;
FIG. 7 is a schematic view of the structure of the rope cutters of the present invention when the rope cutters are parallel to each other;
fig. 8 is a schematic structural view of the string cutters of the present invention when they are perpendicular to each other.
Wherein: 1. a magnetic field modulating disc type PCB motor; 11. DC excitation PCB stator; 111. a first PCB board; 112. an exciting coil; 12. a rotor assembly; 121. a retainer; 122. a magnetic conductive block; 123. a non-magnetic conductive block; 124. a placement groove; 13. a three-phase armature PCB stator; 131. a second PCB board; 132. an armature coil; 14. an upper end cap; 15. a lower end cap; 16. an output shaft;
2. rope type cutting knife; 21. rope reel; 22. a flexible nylon rope;
3. a walking bracket; 31. a walking wheel; 32. an L-shaped connecting rod; 33. pushing the rod laterally.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the detailed description and specific examples, while indicating the embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present application based on the embodiments herein. Examples of the embodiments are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements throughout or elements having like or similar functionality.
It should be noted that the terms "comprises" and "comprising," along with any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or server that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed or inherent to such process, method, article, or apparatus, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present invention, it should be noted that, directions or positional relationships indicated by terms such as "upper", "lower", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or those that are conventionally put in use, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention.
In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The magnetic field modulation disc type PCB motor comprises a shell consisting of an upper end cover 14 and a lower end cover 15, wherein a stator assembly and a rotor assembly 12 are arranged in the shell, the inner side of the rotor assembly 12 extends out of the shell through an output rotating shaft 16 and is rotationally connected with the shell, the output rotating shaft 16 is rotationally connected with the stator assembly through a deep groove ball bearing, the rotor assembly 12 is a magnetic modulation disc rotor, the stator assembly comprises a direct current excitation PCB stator 11 and a three-phase armature PCB stator 13 which are arranged on two sides of the magnetic modulation disc rotor, a primary air gap is reserved between the direct current excitation PCB stator 11 and the magnetic modulation disc rotor, and a secondary air gap is reserved between the magnetic modulation disc rotor and the three-phase armature PCB stator 13; when direct current is supplied to the direct current excitation PCB stator 11, a harmonic magnetic field is generated in a primary air gap, three-phase alternating current is supplied to the three-phase armature PCB stator 13, a rotating magnetic field is generated in a secondary air gap, the rotating magnetic field is modulated by the modulating disc rotor, a harmonic magnetic field with the same pole pair number as the harmonic magnetic field generated by the direct current excitation PCB stator 11 is formed in the primary air gap, the two harmonic magnetic fields are coupled, and the modulating disc rotor rotates under the action of the coupling magnetic field, so that the output rotating shaft can be driven to rotate.
Preferably, the direct current excitation PCB stator 11 includes a plurality of layers of first PCBs 111, excitation windings are distributed on the first PCBs 111 in a mode of winding through a combined printed circuit, direct current is input into the excitation windings, and an induction magnetic field with N, S poles alternately distributed is generated. Preferably, the exciting winding comprises a plurality of exciting coils 112 which are correspondingly distributed on the first PCB 111 in multiple layers and are electrically connected in sequence; corresponding exciting coils 112 on the first PCB 111 on different layers are communicated with adjacent exciting coils 112, and the current directions of the adjacent exciting coils 112 are opposite.
In this embodiment, the magnetic field strength can be improved to a certain extent by increasing the number of layers of the PCB boards, and considering the thickness of the PCB stator, so that 4 layers of first PCB boards 111 are adopted, i, ii, iii, and iv layers are respectively arranged from top to bottom, and 6 exciting coils 112 (respectively, no. 1 coil, no. 2 coil, no. 3 coil, no. 4 coil, no. 5 coil, and No. 6 coil) are arranged in a circumferential array on each layer of first PCB boards 111; the specific current flows as follows: the current starts from the positive electrode interface in the coil 1 and flows through the layers I, II, III and IV in turn along the anticlockwise direction; in the IV layer, current flows from the coil 1 to the coil 2 clockwise and flows through the IV layer, the III layer, the II layer and the I layer in sequence; in the layer I, current flows from the coil No. 2 to the coil No. 3 anticlockwise, and flows through the layers I, II, III and IV in sequence; in the IV layer, current flows from the coil 3 to the coil 4 clockwise and flows through the IV layer, the III layer, the II layer and the I layer in sequence; in the layer I, current flows from the coil 4 to the coil 5 anticlockwise and sequentially flows through the layers I, II, III and IV; in the IV layer, current flows from the coil 5 to the coil 6 clockwise, and flows through the IV, III, II and I layers in sequence to reach the negative electrode interface.
Preferably, the three-phase armature PCB stator 13 includes a plurality of layers of second PCB boards 131, armature windings are distributed on the second PCB boards 131 in a combined type printed circuit winding manner, and three-phase alternating current is fed into the armature windings to generate a rotating magnetic field. Preferably, the armature winding adopts a star connection method, the armature winding comprises three groups of exciting coils 112 which are correspondingly distributed on the multi-layer second PCB 131 and are electrically connected between layers in sequence, one ends of the three groups of exciting coils 112 are respectively connected with an A phase, a B phase and a C phase of three-phase alternating current, and the other ends of the three groups of exciting coils are connected with a neutral point through intermediate nodes; each group of exciting coils 112 comprises two exciting coils 112 which are oppositely arranged and electrically connected; each exciting coil 112 is wound in a spiral or wave shape between the second PCB boards 131 of the same layer.
In this embodiment, considering the thickness of the PCB stator, 4 layers of second PCB boards 131 are also adopted, i, ii, iii, and iv layers are respectively arranged from top to bottom, and each layer of second PCB boards 131 is formed by 6 armature coils 132 (No. 1 coil, no. 2 coil, no. 3 coil, no. 4 coil, no. 5 coil, and No. 6 coil) arranged in a circumferential array, and specific current flows are as follows: the current of A phase flows from the A phase interface in the coil 1 and sequentially flows through the layers I, II, IV and III in the anticlockwise direction, and flows from the coil 1 to the coil 4 anticlockwise in the layer III, and sequentially flows through the layers III, IV, II and I in the coil 4 to reach the intermediate node; the current of B phase flows from B phase interface in coil 2, flows through layers I, II, III and IV in turn in anticlockwise direction, and flows from coil 2 into coil 5 in anticlockwise direction, flows through layers IV, III, II and I in turn to reach intermediate node; the C-phase current starts from the C-phase interface in the coil 3 and sequentially flows through the layers I, III, IV and II in the anticlockwise direction, and the current flows into the coil 6 from the coil 3 in the layer II anticlockwise direction and sequentially flows through the layers II, IV, III and I to reach the intermediate node.
Preferably, the magnetic-adjusting disc rotor comprises a retainer 121, a plurality of placing grooves 124 are uniformly formed in the outer circumferential side of the retainer 121, magnetic-conducting blocks 122 and non-magnetic-conducting blocks 123122 are alternately arranged in the placing grooves 124, circumferential positioning is achieved through interference fit between the inner side of the retainer 121 and an output rotating shaft, and axial positioning is achieved through connection between the inner side of the retainer 121 and the output rotating shaft through elastic check rings.
Preferably, the magnetic conductive blocks 122 are made of silicon steel, the non-magnetic conductive blocks 123122 are made of epoxy resin, and the number, shape and size of the magnetic conductive blocks 122 and the non-magnetic conductive blocks 123122 are the same.
Preferably, the pole pair number of the harmonic magnetic field generated after the direct-current excitation PCB stator 11 is electrified is represented by P1, the pole pair number of the harmonic magnetic field generated after the three-phase armature PCB stator 13 is electrified is represented by P2, the numbers of the magnetic conductive blocks 122 and the non-magnetic conductive blocks 123122 are represented by Z, and the three satisfy the number relation: z=p1+p2.
The application of a magnetic field modulation disc type PCB motor is used for a rope cutter 2, the rope cutter 2 comprises a magnetic field modulation disc type PCB motor 1 and a rope disc 21, the center of the rope disc 21 is in threaded connection with an output rotating shaft of the magnetic field modulation disc type PCB motor 1, and the outer circumference side of the rope disc 21 is connected with a flexible nylon rope 22; the thread screwing direction of the rope reel 21 and the output rotating shaft is the same as the rotating direction of the output rotating shaft, namely the screwing direction is the same as the rotating direction, so that the cutter component is prevented from loosening when the mowing mechanism works. When the magnetic field modulation disc type PCB motor 1 rotates at a high speed, the rope disc 21 is driven to rotate together, so that the flexible nylon rope 22 is driven to rotate at a high speed, and weeds are cut off at the moment that the flexible nylon rope 22 rotating at a high speed contacts with the weeds. And the flexible nylon ropes 22 have the characteristic of avoiding when in cutting work, namely when encountering large resistance, the nylon ropes are bent and do not rigidly collide with stones, and the greening plants are not cut off.
Preferably, the rope cutters 2 are arranged on the walking bracket 3 in parallel or perpendicular to each other; when cutting horizontally grown weeds and vines in the embodiment, the rope cutter 2 can be horizontally arranged to cut vertically grown weeds; the part of rope type cutting knife 2 is vertically arranged to cut the horizontally grown weeds, so that large-area and multidirectional weeding is realized.
The walking bracket 3 comprises a transverse pushing rod 33 and a plurality of L-shaped connecting rods 32, one ends of the L-shaped connecting rods 32 are fixedly connected with the same side of the transverse pushing rod 33, and the bottom sides of the other ends of the L-shaped connecting rods 32 are respectively and rotatably connected with a walking wheel 31; one end of the L-shaped connecting rod 32, which is close to the travelling wheel 31, is provided with a rope cutter 2.
Therefore, the invention adopts the magnetic field modulation disc type PCB motor and the application thereof, the direct current excitation PCB stator replaces the permanent magnet, the three-phase armature PCB stator replaces the winding iron core structure, and the PCB technology replaces the permanent magnet and the winding iron core structure, thereby reducing the volume and the mass of the motor.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention and not for limiting it, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that: the technical scheme of the invention can be modified or replaced by the same, and the modified technical scheme cannot deviate from the spirit and scope of the technical scheme of the invention.
Claims (6)
1. The utility model provides a magnetic field modulation disc PCB motor, includes the casing of constituteing by upper end cover and lower end cover, and the inside stator module and the rotor module of being provided with of casing, the rotor module inboard stretches out the casing and rotates with the casing through output pivot to be connected, and output pivot still rotates through deep groove ball bearing and stator module to be connected, its characterized in that: the rotor assembly is a magnetic-disc-adjusting rotor, the stator assembly comprises a direct-current excitation PCB stator and a three-phase armature PCB stator which are arranged on two sides of the magnetic-disc-adjusting rotor, a primary air gap is reserved between the direct-current excitation PCB stator and the magnetic-disc-adjusting rotor, and a secondary air gap is reserved between the magnetic-disc-adjusting rotor and the three-phase armature PCB stator;
when direct current is fed into the direct current excitation PCB stator, a harmonic magnetic field is generated in the primary air gap, three-phase alternating current is fed into the three-phase armature PCB stator, a rotating magnetic field is generated in the secondary air gap, the rotating magnetic field is modulated by the modulating disc rotor, a harmonic magnetic field with the same pole pair number as the harmonic magnetic field generated by the direct current excitation PCB stator is formed in the primary air gap, the two harmonic magnetic fields are coupled, and the modulating disc rotor rotates under the action of the coupling magnetic field, so that the output rotating shaft can be driven to rotate;
the direct current excitation PCB stator comprises a plurality of layers of first PCB boards, excitation windings are distributed on the first PCB boards in a mode of winding through a combined printed circuit, direct current is input into the excitation windings, and an induction magnetic field with N, S poles distributed alternately is generated;
the exciting winding comprises a plurality of exciting coils which are correspondingly distributed on the first PCB and are electrically connected in sequence;
corresponding exciting coils on the first PCB on different layers are communicated with adjacent exciting coils after being communicated, and the current directions of the two adjacent exciting coils are opposite;
the three-phase armature PCB stator comprises a plurality of layers of second PCB boards, armature windings are distributed on the second PCB boards in a combined type printed circuit winding mode, and three-phase alternating current is fed into the armature windings to generate a rotating magnetic field;
the armature winding adopts a star connection method, and comprises three groups of armature coils which are correspondingly distributed on the second PCB boards and are electrically connected with each other in sequence between layers, one ends of the three groups of armature coils are respectively connected with an A phase, a B phase and a C phase of three-phase alternating current, and the other ends of the three groups of armature coils are connected with neutral points through intermediate nodes;
each group of armature coils comprises two armature coils which are oppositely arranged and electrically connected;
each armature coil is wound in a spiral or wave shape between the second PCBs of the same layer.
2. A magnetic field modulated disc PCB motor as defined in claim 1, wherein: the magnetic regulating disc rotor comprises a retainer, wherein a plurality of placing grooves are uniformly formed in the outer circumferential side of the retainer, magnetic conducting blocks and non-magnetic conducting blocks are alternately arranged in the placing grooves, circumferential positioning is achieved through interference fit between the inner side of the retainer and an output rotating shaft, and axial positioning is achieved through connection of an elastic retainer ring and the output rotating shaft.
3. A magnetic field modulated disc PCB motor as defined in claim 2, wherein: the magnetic conducting blocks are made of silicon steel, the non-magnetic conducting blocks are made of epoxy resin, and the number, the shape and the size of the magnetic conducting blocks and the non-magnetic conducting blocks are the same.
4. A magnetic field modulated disc PCB motor as defined in claim 2, wherein: the pole pair number of the harmonic magnetic field generated after the direct-current excitation PCB stator is electrified is set to be represented by P1, the pole pair number of the harmonic magnetic field generated after the three-phase armature PCB stator is electrified is set to be represented by P2, the numbers of the magnetic conducting blocks and the non-magnetic conducting blocks are respectively represented by Z, and the three satisfy the number relation formula: z=p1+p2.
5. Use of a magnetic field modulating disc PCB motor according to any of the preceding claims 1-4, characterized in that: the rope cutter comprises a magnetic field modulation disc type PCB motor and a rope disc, wherein the center of the rope disc is in threaded connection with an output rotating shaft of the magnetic field modulation disc type PCB motor, and the outer circumference side of the rope disc is connected with a flexible nylon rope;
the thread rotation direction of the rope disc and the output rotating shaft is the same as the rotation direction of the output rotating shaft.
6. The use according to claim 5, characterized in that: the rope cutters are arranged on the walking bracket in parallel or perpendicular to each other;
the walking bracket comprises a transverse pushing rod and a plurality of L-shaped connecting rods, one ends of the L-shaped connecting rods are fixedly connected with the same side of the transverse pushing rod, and the bottom sides of the other ends of the L-shaped connecting rods are respectively and rotatably connected with walking wheels;
one end of the L-shaped connecting rod, which is close to the travelling wheel, is provided with a rope type cutter.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310560660.4A CN116566153B (en) | 2023-05-18 | 2023-05-18 | Magnetic field modulation disc type PCB motor and application thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310560660.4A CN116566153B (en) | 2023-05-18 | 2023-05-18 | Magnetic field modulation disc type PCB motor and application thereof |
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| Publication Number | Publication Date |
|---|---|
| CN116566153A CN116566153A (en) | 2023-08-08 |
| CN116566153B true CN116566153B (en) | 2024-01-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202310560660.4A Active CN116566153B (en) | 2023-05-18 | 2023-05-18 | Magnetic field modulation disc type PCB motor and application thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1549432A (en) * | 2002-10-14 | 2004-11-24 | 迪尔公司 | Axial gap brushless DC motor |
| CN103915973A (en) * | 2014-04-09 | 2014-07-09 | 河南理工大学 | Disc magnetic field modulation type AC permanent magnet gear motor |
| CN114337172A (en) * | 2020-09-30 | 2022-04-12 | 罗伯特·博世有限公司 | Axial flux type PCB winding permanent magnet synchronous motor and stator thereof |
| CN115529927A (en) * | 2022-10-17 | 2022-12-30 | 黄炳南 | Be applied to car of mowing on river levee slope |
-
2023
- 2023-05-18 CN CN202310560660.4A patent/CN116566153B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1549432A (en) * | 2002-10-14 | 2004-11-24 | 迪尔公司 | Axial gap brushless DC motor |
| CN103915973A (en) * | 2014-04-09 | 2014-07-09 | 河南理工大学 | Disc magnetic field modulation type AC permanent magnet gear motor |
| CN114337172A (en) * | 2020-09-30 | 2022-04-12 | 罗伯特·博世有限公司 | Axial flux type PCB winding permanent magnet synchronous motor and stator thereof |
| CN115529927A (en) * | 2022-10-17 | 2022-12-30 | 黄炳南 | Be applied to car of mowing on river levee slope |
Also Published As
| Publication number | Publication date |
|---|---|
| CN116566153A (en) | 2023-08-08 |
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