CN210246426U - Winding rotor and winding type permanent magnet speed regulator - Google Patents
Winding rotor and winding type permanent magnet speed regulator Download PDFInfo
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- CN210246426U CN210246426U CN201921448749.7U CN201921448749U CN210246426U CN 210246426 U CN210246426 U CN 210246426U CN 201921448749 U CN201921448749 U CN 201921448749U CN 210246426 U CN210246426 U CN 210246426U
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Abstract
The application discloses winding rotor and winding formula permanent magnet speed regulator, including first iron core, winding wire and insulating slot wedge, the inner circle or the outer lane of first iron core are the air gap side, the part that first iron core is close to the air gap side is provided with a plurality of wire grooves along the axial, each wire groove distributes around the axis of first iron core, the cross section of wire groove is closed structure, the winding wire sets up on the wire groove, insulating slot wedge also sets up on the wire groove, and be located the wire groove and be close to one side of air gap side, insulating slot wedge is used for compressing tightly the winding wire that corresponds. The utility model provides a winding rotor, because the cross section of metallic channel is closed structure, also is closed slot structure, the insulating slot wedge is difficult to lead to droing because of the rotatory centrifugal force that produces of winding rotor.
Description
Technical Field
The utility model relates to a permanent magnet speed regulator, concretely relates to winding rotor and winding formula permanent magnet speed regulator.
Background
At present, a permanent magnet speed regulator consists of a permanent magnet rotor and a winding rotor, wherein a driving motor (input shaft end) is connected with the permanent magnet speed regulator together to drive the permanent magnet rotor to rotate to generate a rotating magnetic field, the winding rotor cuts magnetic lines of force of the rotating magnetic field to generate induction current so as to generate an induction magnetic field, the induction magnetic field and the permanent magnet magnetic field interact to transfer torque, and the magnitude of the transfer torque is controlled by controlling the magnitude of the current of the winding rotor through a control part so as to adapt to the requirement of rotating speed and realize the speed regulation function.
The electric permanent magnet speed regulator of miniwatt generally adopts the soft winding that round copper enameled wire random-embedded formed, and the winding iron core generally designs for the semi-closed groove, but to the electric permanent magnet speed regulator of great power, because the voltage of winding rotor, electric current are great, adopt random-embedded winding can not satisfy the production requirement, generally design into the hard winding that is formed by single or a plurality of shaping coils series connection, its winding iron core can only design into the open slot, this just brings following problem: 1. when the permanent magnet speed regulator operates, the winding rotates at a high speed to generate a large centrifugal force, and the insulation slot wedge is easy to fall off after long-term operation, so that the normal operation of the permanent magnet speed regulator is influenced; 2. the design of the open slot results in larger harmonic content of an air gap magnetic field, and generates large eddy current loss in the permanent magnet, although the half-closed slot can effectively reduce the eddy current loss in the permanent magnet, the air gap relative magnetic conductance is influenced by low-order harmonic to generate large cogging torque, ripple pulsation and noise of output torque are easily caused, and the control precision of the system is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model is directed at above-mentioned problem, overcome at least one not enough, provided winding rotor and winding formula permanent magnet speed regulator, can effectively solve long-term operation back insulation groove wedge and easily drop the problem that influences permanent magnet speed regulator normal operating.
The utility model adopts the following technical scheme:
the utility model provides a winding rotor, includes first iron core, winding wire and insulating slot wedge, the inner circle or the outer lane of first iron core are the air gap side, the part that first iron core is close to the air gap side is provided with a plurality of wire grooves along the axial, and each wire groove distributes around the axis of first iron core, the cross section of wire groove is closed structure, the winding wire sets up on the wire groove, insulating slot wedge also sets up on the wire groove, and is located the wire groove and is close to one side of air gap side, and insulating slot wedge is used for compressing tightly corresponding winding wire.
The utility model provides a winding rotor, because the cross section of metallic channel is closed structure, also is closed slot structure, the insulating slot wedge is difficult to lead to droing because of the rotatory centrifugal force that produces of winding rotor.
In addition, the cross section of the wire groove is of a closed structure, and compared with an open groove or a semi-closed groove, due to the fact that no notch exists, higher harmonics in a winding wire are well restrained, armature reaction caused by higher harmonic current is weakened, eddy current loss generated in a permanent magnet is reduced, meanwhile, compared with the closed structure, the air gap of the closed structure is only affected by the higher harmonics, the influence of the higher harmonics on cogging torque can be ignored, and the cogging torque is greatly reduced.
In one embodiment of the present invention, the outer ring of the first iron core is an air gap side.
In one embodiment of the present invention, the cross section of the wire guiding groove is rectangular, trapezoidal, or stepped, and the length direction of the wire guiding groove is arranged along the radial direction of the first iron core.
In one embodiment of the present invention, the end of the wire groove close to the air gap side has a radius or a chamfer, and when the end is a radius, the radius R ranges from 0.3mm to 5 mm.
In one embodiment of the present invention, the minimum distance between the wire groove and the air gap side is a, and a is less than or equal to 10 mm.
In one embodiment of the present invention, the number of the wire grooves is an integral multiple of 3; the wire grooves are arranged on the circumference in a uniform or periodic variable pitch.
In one embodiment of the present invention, the winding wire has a single turn or multiple turns.
In the utility model discloses in one of them embodiment, first iron core is lamination formula iron core, is folded along the axial by the silicon steel sheet and is pressed and form, all is provided with the wire on each silicon steel sheet and divides the groove, and the wire that each silicon steel sheet corresponds each other divides the groove to form the wire casing.
The application also discloses a winding type permanent magnet speed regulator, which comprises a hollow permanent magnet rotor and a winding rotor, wherein the winding rotor is sleeved in the permanent magnet rotor; the permanent magnet rotor comprises a hollow second iron core and a permanent magnet embedded on the second iron core, an air gap is directly formed between the inner side wall of the second iron core and the outer side wall of the first iron core, and the permanent magnet is located on one side close to the air gap.
In one embodiment of the present invention, the winding wire includes an upper winding and a lower winding;
the winding type permanent magnet speed regulator further comprises a shell, and the permanent magnet rotor and the winding rotor are both rotatably mounted on the shell.
The utility model has the advantages that: the utility model provides a winding rotor, because the cross section of metallic channel is closed structure, also is closed slot structure, the insulating slot wedge is difficult to lead to droing because of the rotatory centrifugal force that produces of winding rotor. In addition, the cross section of the wire groove is of a closed structure, and compared with an open groove or a semi-closed groove, due to the fact that no notch exists, higher harmonics in a winding wire are well restrained, armature reaction caused by higher harmonic current is weakened, eddy current loss generated in a permanent magnet is reduced, meanwhile, compared with the closed structure, the air gap of the closed structure is only affected by the higher harmonics, the influence of the higher harmonics on cogging torque can be ignored, and the cogging torque is greatly reduced.
Description of the drawings:
FIG. 1 is a partial schematic view of a wound permanent magnet governor;
FIG. 2 is a schematic view of a first configuration of a wire guide slot;
FIG. 3 is a second configuration of wire guides;
FIG. 4 is a third schematic view of a wire guide slot;
FIG. 5 is a schematic view of a fourth configuration of wire guides;
FIG. 6 is a comparison graph of magnetic steel eddy current loss results;
fig. 7 is a comparison graph of cogging torque results.
The figures are numbered:
1. a winding rotor; 2. a permanent magnet rotor; 3. an air gap; 4. a first iron core; 5. a wire guide groove; 6. a winding wire; 7. an air gap side; 8. an insulating slot wedge; 9. a lower layer winding; 10. an upper layer winding; 11. a second iron core; 12. and a permanent magnet.
The specific implementation mode is as follows:
the present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1, the present application discloses a winding type permanent magnet speed regulator, which comprises a hollow permanent magnet rotor 2 and a winding rotor 1 sleeved in the permanent magnet rotor 2; the permanent magnet rotor 2 comprises a hollow second iron core 11 and a permanent magnet 12 embedded on the second iron core 11, an air gap 3 is directly formed between the inner side wall of the second iron core 11 and the outer side wall of the first iron core 4, and the permanent magnet 12 is positioned on one side close to the air gap.
As shown in fig. 1, the winding rotor 1 of the present embodiment includes a first iron core 4, a winding wire 6 and an insulation slot wedge 8, an outer ring of the first iron core 4 is an air gap side 7, a portion of the first iron core 4 close to the air gap side 7 is provided with a plurality of wire grooves 5 along an axial direction, each wire groove 5 is distributed around an axis of the first iron core 4, a cross section of the wire groove 5 is a closed structure, the winding wire 6 is disposed on the wire groove 5, the insulation slot wedge 8 is also disposed on the wire groove 5 and located on a side of the wire groove 5 close to the air gap side 7, and the insulation slot wedge 8 is used for compressing the corresponding winding wire 6.
The winding rotor 1 of the application, because the cross section of the wire groove 5 is of a closed structure, namely a closed groove structure, the insulation slot wedge 8 is not easy to fall off due to the centrifugal force generated by the rotation of the winding rotor 1.
In addition, the cross section of the wire groove 5 is of a closed structure, and compared with an open groove or a semi-closed groove, because no notch exists, high-order harmonics in the winding wire 6 are well inhibited, so that armature reaction caused by high-order harmonic current is weakened, and eddy current loss generated in the permanent magnet is reduced, as shown in fig. 6 (the closed groove refers to the wire groove 5 with the cross section of the closed structure), and meanwhile, for the closed structure, the relative magnetic conductance of an air gap is only affected by the high-order harmonics, the influence of the high-order harmonics on the cogging torque can be ignored, and further the cogging torque is greatly reduced, as shown in fig. 7 (the closed groove refers to the wire groove 5 with the cross section of the closed structure).
In other embodiments, the inner ring of the first core 4 may be the air gap side 7, and the permanent magnet rotor 2 is sleeved in the first core 4.
In the present embodiment, the cross section of the wire groove 5 is rectangular (see fig. 2 and 5), trapezoidal (see fig. 3) or stepped (see fig. 4), the length direction of the wire groove 5 is arranged along the radial direction of the first iron core 4, and the width of the wire groove 5 in fig. 2 and 5 in the present embodiment is 8.5 mm. In practice, the end of the wire groove 5 near the air gap side 7 has a radius (see fig. 2 and 4) or chamfer (see fig. 5), and in the case of rounding, the radius R ranges from 0.3mm to 5 mm.
As shown in fig. 2 to 5, the minimum distance between the wire groove 5 and the air gap side 7 is a, and a is 10mm or less.
In the present embodiment, the number of the wire grooves 5 is an integral multiple of 3; the conductor slots 5 are arranged in a uniform or periodic pitch on the circumference.
In this embodiment, the first iron core 4 is a laminated iron core, and is formed by laminating silicon steel sheets in the axial direction, each silicon steel sheet is provided with a wire sub-slot, and the wires corresponding to each silicon steel sheet are sub-slots to form a wire slot 5.
During practical application, the winding type permanent magnet speed regulator further comprises a shell, and the permanent magnet rotor 2 and the winding rotor 1 are both rotatably installed on the shell.
In the present embodiment, the winding wire 6 includes an upper layer winding 10 and a lower layer winding 9. The upper-layer winding 10 and the lower-layer winding 9 are both made of flat copper enameled wire packages and are placed in a wire groove 5 of the winding rotor 1, the winding wires 6 are of a wave winding structure formed by serially connecting single formed coils, the coil ends are sequentially welded according to the wiring rule of the wave winding, the winding wires 6 are distributed in three phases and finally connected into a star connection method.
When the winding type permanent magnet speed regulator is used, the permanent magnet rotor 2 is connected with a driving motor shaft, the winding rotor 1 is connected with a load (or vice versa), the driving motor drives the permanent magnet rotor 2 to rotate to generate a rotating magnetic field, the winding rotor 1 cuts magnetic lines of the rotating magnetic field to generate induction current so as to generate an induction magnetic field, and the induction magnetic field and the permanent magnet magnetic field interact to transfer torque.
As shown in fig. 6 and 7, the closed slot design of the present embodiment (the wire guide slot 5 having a closed structure in cross section) has eddy current loss of less than 1% and cogging torque of 3.6% with respect to the open slot and half-closed slot designs; while the eddy current loss in the semi-closed slot permanent magnet is 22% and the cogging torque is 70%. The closed slot design not only solves the local demagnetization of the permanent magnet caused by overlarge eddy current loss of the permanent magnet, but also solves the ripple pulsation and noise of torque caused by overlarge cogging torque.
The above only is the preferred embodiment of the present invention, not therefore the limit the patent protection scope of the present invention, all applications the equivalent structure transformation made by the contents of the specification and the drawings of the present invention is directly or indirectly applied to other related technical fields, and all the same principles are included in the protection scope of the present invention.
Claims (10)
1. The winding rotor is characterized by comprising a first iron core, winding wires and an insulation slot wedge, wherein the inner ring or the outer ring of the first iron core is an air gap side, a plurality of wire grooves are axially formed in the part, close to the air gap side, of the first iron core, the wire grooves are distributed around the axis of the first iron core, the cross section of each wire groove is of a closed structure, the winding wires are arranged on the wire grooves, the insulation slot wedge is also arranged on the wire grooves and located on one side, close to the air gap side, of each wire groove, and the insulation slot wedge is used for compressing the corresponding winding wires.
2. The winding rotor of claim 1, wherein the outer race of the first core is an air gap side.
3. The winding rotor according to claim 2, wherein the wire grooves have a rectangular, trapezoidal or stepped cross section, and the length direction of the wire grooves is arranged in the radial direction of the first core.
4. The winding rotor according to claim 3, wherein the end of the wire groove near the air gap side has a radius or chamfer, when rounded, with a radius R in the range of 0.3mm to 5 mm.
5. The winding rotor of claim 4, wherein the minimum distance between the wire slots and the air gap side is A, A being 10mm or less.
6. The winding rotor of claim 2, wherein the number of wire slots is an integer multiple of 3; the wire grooves are arranged on the circumference in a uniform or periodic variable pitch.
7. The winding rotor of claim 2, wherein the winding wire is single-turn or multi-turn.
8. The winding rotor according to claim 2, wherein the first core is a laminated core formed by laminating silicon steel sheets in an axial direction, each silicon steel sheet is provided with the wire sub-slots, and the wire sub-slots of the silicon steel sheets corresponding to each other form the wire slots.
9. A winding type permanent magnet speed regulator is characterized by comprising a hollow permanent magnet rotor and a winding rotor sleeved in the permanent magnet rotor, wherein the winding rotor is the winding rotor according to any one of claims 2-8; the permanent magnet rotor comprises a hollow second iron core and a permanent magnet embedded on the second iron core, an air gap is directly formed between the inner side wall of the second iron core and the outer side wall of the first iron core, and the permanent magnet is located on one side close to the air gap.
10. The wound permanent magnet governor of claim 9, wherein the winding wire includes an upper winding and a lower winding;
the winding type permanent magnet speed regulator further comprises a shell, and the permanent magnet rotor and the winding rotor are both rotatably mounted on the shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921448749.7U CN210246426U (en) | 2019-09-03 | 2019-09-03 | Winding rotor and winding type permanent magnet speed regulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921448749.7U CN210246426U (en) | 2019-09-03 | 2019-09-03 | Winding rotor and winding type permanent magnet speed regulator |
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| Publication Number | Publication Date |
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| CN210246426U true CN210246426U (en) | 2020-04-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921448749.7U Active CN210246426U (en) | 2019-09-03 | 2019-09-03 | Winding rotor and winding type permanent magnet speed regulator |
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| CN (1) | CN210246426U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023213486A1 (en) * | 2022-05-03 | 2023-11-09 | Mahle International Gmbh | Rotor for an externally excited electric synchronous machine |
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2019
- 2019-09-03 CN CN201921448749.7U patent/CN210246426U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023213486A1 (en) * | 2022-05-03 | 2023-11-09 | Mahle International Gmbh | Rotor for an externally excited electric synchronous machine |
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