CN112737152B - Centralized automatic magnetic-regulating speed-regulating motor stator structure - Google Patents

Centralized automatic magnetic-regulating speed-regulating motor stator structure Download PDF

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Publication number
CN112737152B
CN112737152B CN202011491608.0A CN202011491608A CN112737152B CN 112737152 B CN112737152 B CN 112737152B CN 202011491608 A CN202011491608 A CN 202011491608A CN 112737152 B CN112737152 B CN 112737152B
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Prior art keywords
stator
winding
pointer
sliding
groove
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CN112737152A (en
Inventor
邱洪波
梁广川
贾宛英
阎鑫
陈文博
刘小梅
伊然
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Zhengzhou University of Light Industry
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Zhengzhou University of Light Industry
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K1/00Details of the magnetic circuit
    • H02K1/06Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12Stationary parts of the magnetic circuit
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K3/00Details of windings
    • H02K3/04Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • H02K3/12Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K3/00Details of windings
    • H02K3/46Fastening of windings on the stator or rotor structure
    • H02K3/50Fastening of winding heads, equalising connectors, or connections thereto

Abstract

The invention discloses a stator structure of a centralized automatic magnetic-regulating and speed-regulating motor, which comprises a stator and a winding, wherein a stator back groove is formed in the back of the stator along the circumference, a circular track is arranged at the bottom of the stator back groove, and a sliding ring in sliding fit with the circular track is arranged at the circular track; three sliding devices with contact pointers are embedded in the groove at the back of the stator, and the positions of the three sliding devices with the contact pointers correspond to A, B, C three-phase windings respectively; the sliding device with the contact pointer comprises the pointer with a spherical contact structure, a spring, an induction copper sheet and a fixed baffle. When the motor operates, leakage magnetic flux can be generated in the stator groove, the induction copper sheet generates electromagnetic force under the action of the leakage magnetic flux, when the electromagnetic force is larger than the elastic force generated by the spring, the sliding device is pushed to rotate in the forward direction, when the electromagnetic force is smaller than the elastic force of the spring, the sliding device is pushed to rotate in the reverse direction, the effective turn number of the stator winding can be automatically changed according to the change of the magnetic flux, and therefore the size of the magnetic flux can be adjusted.

Description

Centralized automatic magnetic-regulating speed-regulating motor stator structure
Technical Field
The invention relates to the technical field of motors, in particular to a stator structure of a centralized automatic magnetic and speed regulating motor.
Background
The speed regulation of the motor is always a key technology of the motor, and the frequency conversion speed regulation is mostly adopted in a plurality of speed regulation methods. For asynchronous motors, frequency conversion speed regulation is mostly adopted. Under the condition of constant power speed regulation, the air gap magnetic field of the motor is reduced when the speed of the motor is increased, so that the output torque of the motor is reduced, the overload capacity is reduced, and the motor can not continuously run at a higher speed.
The invention discloses a torque self-adaptive continuously variable speed permanent magnet inner rotor brushless motor, which comprises a motor shaft, a rotor, a stator, a shell, an end cover and the like. The rotor is internally provided with a mechanism which automatically adapts to the change of torque and adjusts the magnetic flux, and the mechanism mainly comprises a spring measurement and control system and a spiral transmission pair, can convert the torque generated by the stator current in the magnetic field of the rotor into axial component force in proportion to lead the stator to do spiral motion on a motor shaft, thereby leading the stator to change the axial position of the rotor, changing the air gap magnetic flux from the original constant into a function of the torque, leading the rotating speed to change along with the inverse ratio of the torque, leading the output power to be constant all the time, and leading the brushless motor to have the self-adapting equal-power stepless speed change characteristic of multiple speed change ratio. The invention realizes the direct torque control effect by a simple and reliable method.
The invention of publication number CN105914979A discloses a less rare earth combined excitation type stator-rotor double-partition adjustable flux permanent magnet motor, which comprises an outer area stator, an outer area rotor, a middle area stator, an inner area rotor and an inner area stator which are arranged in a partition manner from outside to inside in the radial direction; the stator in the middle area of the double salient poles consists of a stator yoke, stator slots, stator teeth protruding from the two radial sides and error-tolerant teeth, wherein concentrated distributed three-phase armature windings are wound on the stator teeth; in the inner zone stator, the tangentially magnetized rare earth neodymium iron boron permanent magnet is uniformly embedded along the circumferential direction; in the outer-zone stator, radially magnetized alnico permanent magnets are uniformly attached along the circumferential direction, and a groove is reserved between adjacent alnico permanent magnets for placing a pulse magnetized winding; the inner zone rotor and the outer zone rotor both have salient pole structures, and gaps between salient poles are filled with non-magnetic conducting materials. The invention realizes the purposes of improving the torque density, widening the speed regulation range and further reducing the using amount of the rare earth permanent magnet material by adopting a stator and rotor double-partition structure.
The invention of the publication No. CN105553128B discloses a hybrid excitation flux switching motor, which comprises an outer stator, a rotor and an inner stator, wherein the rotor is coaxially sleeved outside the inner stator, the outer stator is coaxially sleeved outside the rotor, the outer stator consists of an outer stator iron core, a permanent magnet and a three-phase armature winding, the three-phase alternating current excitation winding is sleeved on a salient pole tooth of the iron core of the inner stator, the number of the salient pole teeth of the iron core of the inner stator is equal to that of the permanent magnet, and the radial central axis of the salient pole tooth of the iron core of the inner stator is coincident with the radial central axis of the permanent magnet; the problem that the field winding needs to be placed by reducing the volume of the permanent magnet or the number of turns of the armature winding in the prior art can be effectively solved, the electromagnetic load of the motor is increased, the amplitude-adjustable symmetrical three-phase alternating current is introduced into the inner stator field winding to generate a rotating magnetic field with adjustable amplitude and polarity, and the rotating magnetic field is superposed with an effective air gap magnetic field in the permanent magnetic field, so that the effective harmonic component in the permanent magnetic field is enhanced or weakened, and the purpose of magnetic regulation operation is realized.
The technical scheme discloses a plurality of magnetic regulation and speed regulation schemes, but the effects of continuous regulation range, smooth speed regulation and short regulation time cannot be achieved.
Disclosure of Invention
The invention aims to provide a stator structure of a centralized automatic magnetic and speed regulating motor.
In order to solve the technical problems, the invention adopts the following technical scheme:
a centralized automatic magnetic-regulating and speed-regulating motor stator structure comprises a stator and a winding, wherein the winding adopts a back-winding structure, a stator back groove is formed in the back of the stator along the circumference, a circular track is arranged at the bottom of the stator back groove, and a sliding ring in sliding fit with the circular track is arranged at the circular track;
three sliding devices with contact pointers are embedded in the groove at the back of the stator, and the positions of the three sliding devices with the contact pointers correspond to A, B, C three-phase windings respectively;
the sliding device with the contact pointer comprises a pointer with a spherical contact structure, a spring, an induction copper sheet and a fixed baffle, wherein: the root of the pointer is connected with the slip ring, and the top of the pointer is of a spherical contact structure and contacts with the winding along the radial direction pointing to the winding; the three pointers have electrical angles which are different by 120 degrees along the circumference, and the induction copper sheet is fixed on any one or more of the pointers; the fixed baffle is fixedly arranged on the edge of each phase of winding; one end of the spring is connected to the induction copper sheet or the pointer, and the other end of the spring is connected to the fixed baffle;
when the motor operates, leakage magnetic flux can be generated in the groove at the back of the stator, the induction copper sheet generates electromagnetic force under the action of the leakage magnetic flux, when the electromagnetic force is larger than the elastic force generated by the spring, the sliding device is pushed to rotate in the forward direction, when the electromagnetic force is smaller than the elastic force of the spring, the sliding device is pushed to rotate in the reverse direction, the effective turn number of the stator winding can be automatically changed according to the change of magnetic flux, and therefore the size of the magnetic flux can be adjusted.
Each phase of winding is provided with uniform circular grooves along the rotation range of the pointer, so that the spherical contact structure of the pointer is conveniently contacted with the winding.
The initial positions corresponding to the pointers are all on the first conductor of each phase of winding.
And the wires in each phase winding are isolated from each other by using an insulating medium.
And balls are embedded between the sliding ring and the circular track, so that the sliding fit of the sliding ring and the circular track is realized.
The fixed baffle is welded at the groove of the back of the stator beside the corresponding sliding device.
The fixed baffle is welded on the silicon steel sheet vertical to the groove at the back of the stator.
An outgoing line is led out from the pointer, and an outgoing line slot is arranged on the stator corresponding to the outgoing line.
The invention has the beneficial effects that:
the invention provides a centralized automatic magnetic regulation and speed regulation structure, which can regulate the number of turns of a winding at the same time, and has the advantages that when an air gap magnetic field changes, electromagnetic force generated by the change of induced magnetic flux of an induction copper sheet is used for pushing a sliding device to rotate under the combined action of the electromagnetic force and elastic force generated by the deformation of a spring, so that the number of turns of the winding can be automatically regulated, the air gap magnetic field can be regulated, and the overload capacity of a motor in a high-speed state can be improved. The motor has wider speed regulation range, smooth speed regulation and short regulation time.
The sliding device automatically rotates back and forth through the change of a magnetic field under the interaction of electromagnetic force and elastic force, and the number of turns of the winding is adjusted.
The contact pointer is contacted, the number of turns of the winding is changed, the size of the magnetic field is adjusted, the motor can have larger output torque at high speed, and the overload capacity of the motor in a high-speed running state is improved.
In the invention, as the three pointers are fixed on the same slip ring and respectively correspond to each phase of winding, the number of turns of each phase of winding can be simultaneously adjusted, compared with the mode of changing the number of turns of the motor winding by tapping, the novel structure adopts a lead form, and the complexity of motor winding is reduced; meanwhile, the device also has the advantages of continuous adjustment range, smooth speed adjustment, short time and the like.
Drawings
FIG. 1 is a schematic front view of the present invention;
FIG. 2 is a schematic view of the sliding device with contact fingers according to the present invention;
fig. 3 is a schematic diagram of the working principle of the present invention.
Detailed Description
The following detailed description of the embodiments will be made with reference to the accompanying drawings.
As shown in fig. 1 to fig. 3, the present embodiment discloses a stator structure of a centralized automatic magnetic-field-adjusting and speed-regulating motor, which includes a stator 1 and a winding 5, wherein the winding 5 adopts a back-wound structure.
Stator back recess has been seted up along the circumference in the stator back, and the setting of stator back recess will be guaranteed all to correspond on every phase winding in accommodation range has stator back recess for slider's pointer is connected with the winding.
The bottom of the groove at the back of the stator is provided with a circular track, and a slip ring 2 in sliding fit with the circular track is arranged at the circular track.
Three sliding devices with contact pointers are embedded in the groove in the back of the stator, and the positions of the three sliding devices with contact pointers correspond to A, B, C three-phase windings respectively.
The sliding device with the contact pointer comprises a pointer 7 with a ball-type contact structure, a spring 4, a sensing copper sheet 6 and a fixed baffle 3, wherein: the root of the pointer 7 is respectively connected with the slip ring 2, and the top of the pointer 7 is of a spherical contact structure, points to the winding 5 along the radial direction and is in contact with the winding 5; the induction copper sheet 6 is flat and is fixed on one or more pointers 7; the fixed baffle 3 is fixedly arranged on the edge of each phase of winding; one end of the spring 4 is connected to the induction copper sheet 6 or the pointer 8 (when the induction copper sheet is arranged on the pointer, the spring is connected to the induction copper sheet, and when the induction copper sheet is not arranged on the pointer, the spring is connected to the pointer), and the other end of the spring is connected to the fixed baffle 3.
When the motor runs, leakage magnetic flux can be generated in the groove at the back of the stator, the induction copper sheet generates electromagnetic force under the action of the leakage magnetic flux, when the electromagnetic force is larger than the elastic force generated by the spring, the sliding device is pushed to rotate in the forward direction, and when the electromagnetic force is smaller than the elastic force of the spring, the sliding device is pushed to rotate in the reverse direction.
In the embodiment, the conducting wire of each phase of winding is isolated from the conducting wire by using the insulating medium, and the conducting wire is provided with uniform circular grooves along the rotating range of the pointer, so that the spherical contact structure of the pointer is conveniently contacted with the winding. The pointer of the spherical contact structure is in contact with the slotted winding, so that the purpose of changing the effective turns of the motor is achieved, and the size of the magnetic flux of the motor is further changed.
In this embodiment, the sliding ring 2 and the circular track are embedded with balls therebetween, so as to achieve sliding fit between the sliding ring and the circular track.
In this embodiment, fixed stop 3 is fixed in the stator back groove department that corresponds the slider side, and is concrete, and fixed stop 3 welds on the silicon steel sheet of perpendicular to stator back groove.
In this embodiment, an outgoing line is led out from the pointer 7, the outgoing line is connected to a terminal box of the motor end cover, and an outgoing line slot is formed in a position, corresponding to the outgoing line, on the stator.
In this embodiment, the initial positions corresponding to the pointers 7 are all on the first wire of each phase of winding.
The working principle of the invention is as follows: when the motor operates, main magnetic flux passes through the stator core, leakage magnetic flux can be generated in the stator back groove, the larger the main magnetic flux in the stator core is, the more the leakage magnetic flux can be correspondingly increased in the stator back groove, and when the main magnetic flux of the stator core is reduced, the leakage magnetic flux can be correspondingly reduced in the stator back groove. The induction copper sheet generates electromagnetic force by utilizing the change of leakage magnetic flux in the groove at the back of the stator, and when the electromagnetic force is greater than the elastic force of the spring, the whole sliding device is pushed to rotate forwards; when the electromagnetic force is smaller than the elastic force of the spring, the elastic force of the spring pushes the sliding device to rotate reversely. The invention can automatically change the effective turn number of the stator winding under the combined action of electromagnetic force and elastic force according to the change of magnetic flux, thereby adjusting the size of the magnetic flux.
The sliding device automatically rotates back and forth through the change of a magnetic field under the interaction of electromagnetic force and elastic force, and the number of turns of the winding is adjusted.
The contact pointer is contacted, the number of turns of the winding is changed, the size of the magnetic field is adjusted, the motor can have larger output torque at high speed, and the overload capacity of the motor in a high-speed running state is improved.
The invention provides a centralized automatic magnetic regulation and speed regulation structure, which can regulate the number of turns of a winding at the same time, and has the advantages that when an air gap magnetic field changes, electromagnetic force generated by the change of induced magnetic flux of an induction copper sheet is used for pushing a sliding device to rotate under the combined action of the electromagnetic force and elastic force generated by the deformation of a spring, so that the number of turns of the winding can be automatically regulated, the air gap magnetic field can be regulated, and the overload capacity of a motor in a high-speed state can be improved. The motor has wider speed regulation range, smooth speed regulation and short regulation time.
In the invention, as the three pointers are fixed on the same slip ring and respectively correspond to each phase of winding, the number of turns of each phase of winding can be simultaneously adjusted, compared with the mode of changing the number of turns of the motor winding by tapping, the novel structure adopts a lead form, and the complexity of motor winding is reduced; meanwhile, the device also has the advantages of continuous adjustment range, smooth speed adjustment, short time and the like.
Although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that: modifications and equivalents may be made thereto without departing from the spirit and scope of the invention and it is intended to cover in the claims the invention as defined in the appended claims.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the scope of the present invention.

Claims (8)

1. The utility model provides a centralized automatic magnetic speed regulating motor stator structure, includes stator and winding, and the winding adopts back of the body winding formula structure, its characterized in that: a stator back groove is formed in the back of the stator along the circumference, a circular track is arranged at the bottom of the stator back groove, and a sliding ring in sliding fit with the circular track is arranged at the circular track;
three sliding devices with contact pointers are embedded in the groove at the back of the stator, and the positions of the three sliding devices with the contact pointers correspond to A, B, C three-phase windings respectively;
the sliding device with the contact pointer comprises a pointer with a spherical contact structure, a spring, an induction copper sheet and a fixed baffle, wherein: the root of the pointer is connected with the slip ring, and the top of the pointer is of a spherical contact structure and contacts with the winding along the radial direction pointing to the winding; the three pointers have electrical angles which are different by 120 degrees along the circumference, and the induction copper sheet is fixed on any one or more of the pointers; the fixed baffle is fixedly arranged on the edge of each phase of winding; one end of the spring is connected to the induction copper sheet or the pointer, and the other end of the spring is connected to the fixed baffle;
when the motor operates, leakage magnetic flux can be generated in the groove at the back of the stator, the induction copper sheet generates electromagnetic force under the action of the leakage magnetic flux, when the electromagnetic force is larger than the elastic force generated by the spring, the sliding device is pushed to rotate in the forward direction, when the electromagnetic force is smaller than the elastic force of the spring, the sliding device is pushed to rotate in the reverse direction, the effective turn number of the stator winding can be automatically changed according to the change of magnetic flux, and therefore the size of the magnetic flux can be adjusted.
2. The stator structure of the centralized automatic magnetic and speed regulating motor according to claim 1, characterized in that: each phase of winding is provided with uniform circular grooves along the rotation range of the pointer, so that the spherical contact structure of the pointer is conveniently contacted with the winding.
3. The stator structure of the centralized automatic magnetic and speed regulating motor according to claim 1, characterized in that: the initial positions corresponding to the pointers are all on the first conductor of each phase of winding.
4. The stator structure of the centralized automatic magnetic and speed regulating motor according to any one of claims 1 to 3, wherein: and the wires in each phase winding are isolated from each other by using an insulating medium.
5. The stator structure of the centralized automatic magnetic and speed regulating motor according to any one of claims 1 to 3, wherein: and balls are embedded between the sliding ring and the circular track, so that the sliding fit of the sliding ring and the circular track is realized.
6. The stator structure of the centralized automatic magnetic and speed regulating motor according to any one of claims 1 to 3, wherein: the fixed baffle is welded at the groove of the back of the stator beside the corresponding sliding device.
7. The stator structure of the centralized automatic magnetic and speed regulating motor according to claim 6, wherein: the fixed baffle is welded on the silicon steel sheet vertical to the groove at the back of the stator.
8. The stator structure of the centralized automatic magnetic and speed regulating motor according to any one of claims 1 to 3, wherein: an outgoing line is led out from the pointer, and an outgoing line slot is arranged on the stator corresponding to the outgoing line.
CN202011491608.0A 2020-12-17 2020-12-17 Centralized automatic magnetic-regulating speed-regulating motor stator structure Active CN112737152B (en)

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Application Number Priority Date Filing Date Title
CN202011491608.0A CN112737152B (en) 2020-12-17 2020-12-17 Centralized automatic magnetic-regulating speed-regulating motor stator structure

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CN112737152B true CN112737152B (en) 2021-10-22

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU7147500A (en) * 1999-11-08 2001-05-10 George Anthony Contoleon Permanent magnet,repulsion magnetic field gradient engine
CN106464013A (en) * 2014-02-13 2017-02-22 株式会社ExH Power supply system
CN110460175A (en) * 2019-07-26 2019-11-15 南京理工大学 A kind of axial magnetic flux concentratred winding type mixed excitation electric machine
CN111049288A (en) * 2019-12-31 2020-04-21 郑州轻工业大学 Surrounding type winding magnetic flux modulation stator structure

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU7147500A (en) * 1999-11-08 2001-05-10 George Anthony Contoleon Permanent magnet,repulsion magnetic field gradient engine
CN106464013A (en) * 2014-02-13 2017-02-22 株式会社ExH Power supply system
CN110460175A (en) * 2019-07-26 2019-11-15 南京理工大学 A kind of axial magnetic flux concentratred winding type mixed excitation electric machine
CN111049288A (en) * 2019-12-31 2020-04-21 郑州轻工业大学 Surrounding type winding magnetic flux modulation stator structure

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