CN110221205B - Magnetic resistance equivalent overlapping type slot-changing high large alternating current motor stator bar magnetic leakage simulation device - Google Patents
Magnetic resistance equivalent overlapping type slot-changing high large alternating current motor stator bar magnetic leakage simulation device Download PDFInfo
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- CN110221205B CN110221205B CN201910561074.5A CN201910561074A CN110221205B CN 110221205 B CN110221205 B CN 110221205B CN 201910561074 A CN201910561074 A CN 201910561074A CN 110221205 B CN110221205 B CN 110221205B
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- 238000004088 simulation Methods 0.000 title claims abstract description 16
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 66
- 230000007246 mechanism Effects 0.000 claims abstract description 44
- 229910000976 Electrical steel Inorganic materials 0.000 claims abstract description 38
- 230000001050 lubricating effect Effects 0.000 claims description 7
- 238000005461 lubrication Methods 0.000 claims description 3
- 238000004080 punching Methods 0.000 abstract description 8
- 238000012360 testing method Methods 0.000 description 11
- 238000000034 method Methods 0.000 description 10
- 230000008569 process Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 239000010410 layer Substances 0.000 description 6
- 238000004804 winding Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000005672 electromagnetic field Effects 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 229920001169 thermoplastic Polymers 0.000 description 3
- 239000004416 thermosoftening plastic Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000012942 design verification Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- 230000017105 transposition Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/34—Testing dynamo-electric machines
- G01R31/346—Testing of armature or field windings
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- 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
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The invention discloses a magnetic resistance equivalent overlapping type slot-variable high large alternating current motor stator bar magnetic leakage simulation device which comprises a driving mechanism, a fixed iron core and a movable iron core, wherein the driving mechanism, the fixed iron core and the movable iron core are sequentially arranged from bottom to top, the fixed iron core is fixedly connected with the driving mechanism, the movable iron core is movably connected with the driving mechanism, the fixed iron core comprises a support bracket and fixed slotless silicon steel sheets fixedly arranged on the support bracket, the fixed slotless silicon steel sheets are axially and vertically arranged at equal intervals, the movable iron core comprises a sliding bracket and movable slotted silicon steel sheets, the movable slotted silicon steel sheets are axially and vertically arranged at equal intervals, and the fixed slotless silicon steel sheets are movably inserted into gaps between the movable slotted silicon steel sheets. The invention saves the cost of the punching die and the stator punching cost, simulates the tooth slot structure of the stator core with different slot heights when the slot width is unchanged, and realizes the magnetic leakage simulation of the stator bar of the large alternating current motor with variable slot heights.
Description
Technical Field
The invention belongs to the field of alternating current motor stator winding design and engineering test, and particularly relates to a magnetic resistance equivalent overlapping type slot-variable high-size alternating current motor stator bar magnetic leakage simulation device.
Background
Engineering test simulation of the magnetic leakage effect of the stator bar of the large-sized alternating current motor plays a key role in grasping the actual physical process and design verification of the magnetic leakage effect of the stator bar in detail, and is an important engineering verification link of research and development design of the large-sized alternating current motor. The stator bar magnetic leakage effect mainly comprises induced circulation between braided transposition strands and induced eddy current of the strands. The induced circulation and the induced eddy current are related to the size of the bar, the size of the stator slot and the position of the bar in the slot; the size of the wire rod is mainly the height and width of the wire rod after insulation and corona prevention, in order to ensure reasonable value of tooth magnetic load, the width of the wire rod is basically constant after the stator slot number and rated voltage are selected, and the heat dissipation capacity is mainly realized by adjusting the height of the wire rod; the size of the stator slot is determined by the size of the wire rod and the size of the fixing structure (side pad strip, slot wedge, wedge bottom pad strip, slot bottom pad strip, interlayer pad strip and the like); the radial and lateral positions of the stator bars in the slots are determined mainly by the dimensions of the fixing structures (side bars, slot wedges, under wedge bars, slot bottom bars, interlayer bars, etc.), which are generally the same for the same insulation system. Therefore, when the voltage class, the number of stator slots, the magnetic load, and the insulation system of the large ac motor are determined, the stator bar height is the most affected on the induced circulation and the induced eddy current.
For systematic research of the magnetic leakage effect of the stator bar of the large alternating current motor, besides adopting an electromagnetic field numerical simulation technology, experimental research is adopted to be closer to the actual state of the motor. Compared with the electromagnetic field numerical simulation technology, the experimental study can truly reflect the dispersibility of the stator bar off-line process and the in-slot fixing process, which cannot be replaced by the electromagnetic field numerical model. In engineering test, the widths of test bars are the same, but the heights are different, so that stator cores with various specifications are needed to meet test requirements, the cost of a punching die and the cost of a stator core punching are very high, and the stator cores cannot be reused in the design of other slot number motors. Therefore, how to reduce the cost of test equipment in engineering tests of magnetic leakage effect of stator bars with different heights is a very important problem for large-sized AC motor enterprises.
Disclosure of Invention
The invention aims at: aiming at the problems, the magnetic resistance equivalent overlapping type slot-height-variable large-sized alternating current motor stator bar magnetic leakage simulation device is provided, the slot structures of stator iron cores with different slot heights are simulated when the slot widths are unchanged, the slot-height-variable large-sized alternating current motor stator bar magnetic leakage simulation is realized, the stator iron cores are recycled, and the test cost is greatly reduced.
The technical scheme adopted by the invention is as follows:
The utility model provides a magnetic resistance equivalent overlapping formula becomes high large-scale alternating current motor stator bar magnetic leakage analogue means of groove, include from bottom to top drive mechanism that sets gradually, with drive mechanism fixed connection's fixed iron core and with drive mechanism swing joint's movable iron core, fixed iron core includes the support bracket and fixed slotless silicon steel sheet of fixed setting on the support bracket, fixed slotless silicon steel sheet is along axial parallel, vertical arrangement becomes equidistant setting, movable iron core includes sliding bracket and movable slotted silicon steel sheet, movable slotted silicon steel sheet is along axial parallel, vertical arrangement becomes equidistant setting, fixed slotless silicon steel sheet activity inserts in the clearance between the movable slotted silicon steel sheet.
Further, the driving mechanism comprises a bottom frame and a screw rod lifting mechanism arranged on the bottom frame, and an electric servo driving device, a control device, a bearing and a lubricating device are arranged on the bottom frame.
Further, the screw lifting mechanism is connected with the electric servo driving system through a gear structure, and a bearing and a lubricating device for providing rotary support and lubrication are arranged at the bottom end of the screw lifting mechanism.
Further, the electric servo driving device is electrically connected with the control device, the electric servo driving device comprises a servo motor, a speed regulator and a position sensor, and the control device comprises a control panel.
Further, the screw rod lifting mechanism is movably connected with the movable iron core through a built-in internal threaded piece, and the movable iron core is movably connected with the driving mechanism through a threaded pair of the screw rod lifting mechanism.
Further, the undercarriage is provided with a hoisting device for hoisting the whole device.
Further, the fixed iron core is connected with the driving mechanism through a fastener.
In summary, due to the adoption of the technical scheme, the beneficial effects of the invention are as follows:
1. According to the invention, the stator iron cores with equal slot widths and unequal slot depths can be obtained through the relative movement of the movable iron core and the fixed iron core, so that the controllable change of the slot heights of the stator iron cores is realized;
2. According to the invention, only two stator punching sheets with different specifications are needed, namely, the fixed slotless silicon steel sheet and the movable slotting silicon steel sheet, so that the cost of a punching sheet die and the cost of the stator punching sheet are greatly saved;
3. The movable iron core is driven by the electric screw lifting mechanism relative to the fixed iron core, so that manpower is not required, and accurate regulation and real-time feedback of the stator slot height are realized through the speed regulator and the position sensor;
4. the movable iron core and the fixed iron core can be detached and replaced, and the movable iron core and the fixed iron core are convenient to use and simple to maintain.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the structure of the device of the present invention;
FIG. 2 is a schematic view of a movable iron core;
fig. 3 is a schematic structural view of a fixed iron core;
FIG. 4 is a schematic diagram of a driving mechanism;
FIG. 5 is a schematic diagram of the magneto-resistive equivalent of the device of the present invention;
The marks in the figure: 1-fixed iron core, 2-movable iron core, 3-driving mechanism, 4-fastener, 5-movable slotted silicon steel sheet, 6-sliding bracket, 7-fixed slotless silicon steel sheet, 8-supporting bracket, 9-underframe, 10-lead screw lifting mechanism, 11-electric servo driving device, 12-control device, 13-bearing and lubricating device, 14-lifting device, 15-upper winding, 16-lower winding and 17-stator winding magnetic leakage.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the particular embodiments described herein are illustrative only and are not intended to limit the invention, i.e., the embodiments described are merely some, but not all, of the embodiments of the invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by a person skilled in the art without making any inventive effort, are intended to be within the scope of the present invention.
It is noted that relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The features and capabilities of the present invention are described in further detail below in connection with the examples.
Example 1
The invention provides a magnetic resistance equivalent overlapping type slot-variable high-speed large alternating current motor stator bar magnetic leakage simulation device, which comprises a driving mechanism 3, a fixed iron core 1 and a movable iron core 2, wherein the driving mechanism 3, the fixed iron core 1 and the movable iron core 2 are sequentially arranged from bottom to top, the fixed iron core 1 is fixedly connected with the driving mechanism 3, the fixed iron core 1 comprises a support bracket 8 and fixed slotless silicon steel sheets 7 fixedly arranged on the support bracket 8, the fixed slotless silicon steel sheets 7 are axially and vertically arranged in an equidistant manner, the movable iron core 2 comprises a sliding bracket 6 and movable slotted silicon steel sheets 5, the movable slotted silicon steel sheets 5 are axially and vertically arranged in an equidistant manner, and the fixed slotless silicon steel sheets 7 are movably inserted into gaps between the movable slotted silicon steel sheets 5.
The movable slotting silicon steel sheet 5 and the fixed non-slotting silicon steel sheet 7 are overlapped with each other with a certain axial width, the movable slotting silicon steel sheet 5 is arranged on the fixed non-slotting silicon steel sheet 7; the movable slotted silicon steel sheet 5 is adhered according to a certain width and then is axially and vertically arranged into equidistant iron core sections, and then is fixed and supported by high-strength plastics with thermoplastic curing on the left side and the right side to form a movable iron core 2; the fixed slotless silicon steel sheets 7 are adhered according to a certain width and then are axially and vertically arranged into equidistant iron core sections, and then are fixed and supported by high-strength plastics with thermoplastic curing on the left side and the right side to form a fixed iron core 1; the movable iron core 2 moves up and down along the vertical direction relative to the fixed iron core 1, and the stator slot height is changed.
The driving mechanism 3 comprises a bottom frame 9 and a screw rod lifting mechanism 10 arranged on the bottom frame 9, and an electric servo driving device 11, a control device 12 and a bearing and lubricating device 13 are arranged on the bottom frame 9;
the screw lifting mechanism 10 is connected with the electric servo driving system 11 through a gear structure, and a bearing and lubricating device 13 for providing rotary support and lubrication is arranged at the bottom end of the screw lifting mechanism 10; the movable iron core 2 is driven by a screw lifting mechanism 10 to realize lifting, resting and descending.
Wherein, the electric servo driving device 11 is electrically connected with the control device 12, the electric servo driving device 11 comprises a servo motor, a speed regulator and a position sensor, and the control device 12 comprises a control panel; the screw lifting mechanism 10 is powered by a servo motor driving device 11 and is provided with a speed regulator and a position sensor to control the ascending and descending speed, quantitative control of the screw lifting mechanism 10 is realized through digital display feedback and inching control of a control device 12, and the relative displacement of the movable iron core 2 and the fixed iron core 1 is accurately fed back in real time through a control panel.
Wherein, the screw rod lifting mechanism 10 is movably connected with the movable iron core 2 through a built-in internal screw thread piece, and the movable iron core 2 is connected with the screw rod lifting mechanism 10 through an internal screw thread metal piece in thermoplastic high-strength plastic, so as to realize the lifting and the lowering of the movable iron core 2; the movable iron core 2 is movably connected with the driving mechanism 3 through a screw pair of the screw lifting mechanism 10, and the movable iron core 2 is driven by the screw lifting mechanism 10 to ascend, stand and descend.
Wherein the underframe 9 is provided with a lifting device 14 for lifting the whole device; the lifting device 14 is welded to the chassis 9.
Wherein, fixed iron core 1 is connected with actuating mechanism 3 through fastener 4, and fixed iron core 1 is fixed on metal chassis 9 through fastener 4.
Example 2
In the magnetic resistance equivalent overlapping type slot-variable high large alternating current motor stator bar magnetic leakage simulation device provided by the invention, in the test process, as shown in fig. 5, a stator lower-layer bar 16 and a stator upper-layer bar 15 are respectively embedded into slots of a test iron core according to the test scheme, namely, gaps between a fixed slotless silicon steel sheet 7 of a fixed iron core 1 and a movable slotted silicon steel sheet 5 of a movable iron core 2 are respectively formed, the movable iron core 2 provides transverse support for the stator lower-layer bar 16 and the stator upper-layer bar 15, the fixed iron core 1 provides radial support for the stator lower-layer bar 16 and the stator upper-layer bar 15, the electric servo driving system 11 drives the screw lifting mechanism 10 to operate under the inching control of the control device 12, so that the movable iron core 2 moves vertically and downwards relative to the fixed iron core 1, and the slot heights of slots between the fixed slotless silicon steel sheet 7 and the movable slotted silicon steel sheet 5 are changed, namely, the slot heights of stator punching sheets and the positions of the stator bars in the stator slots are changed, and finally the distribution of stator bar magnetic leakage 17 is changed.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (4)
1. A magnetic resistance equivalent overlapping type slot-variable high large alternating current motor stator bar magnetic leakage simulation device is characterized in that: the movable iron core (2) comprises a support bracket (8) and fixed slotless silicon steel sheets (7) fixedly arranged on the support bracket (8), wherein the fixed slotless silicon steel sheets (7) are arranged at equal intervals along the axial direction in parallel and vertically, the movable iron core (2) comprises a sliding bracket (6) and movable slotted silicon steel sheets (5), the movable slotted silicon steel sheets (5) are arranged at equal intervals along the axial direction in parallel and vertically, and the fixed slotless silicon steel sheets (7) are movably inserted into gaps between the movable slotted silicon steel sheets (5); the driving mechanism (3) comprises a bottom frame (9) and a screw rod lifting mechanism (10) arranged on the bottom frame (9), and an electric servo driving device (11), a control device (12) and a bearing and lubricating device (13) are arranged on the bottom frame (9); the screw lifting mechanism (10) is connected with the electric servo driving device (11) through a gear structure, and the bearing and lubricating device (13) for providing rotary support and lubrication is arranged at the bottom end of the screw lifting mechanism (10); the screw lifting mechanism (10) is movably connected with the movable iron core (2) through a built-in internal threaded piece, and the movable iron core (2) is movably connected with the driving mechanism (3) through a threaded pair of the screw lifting mechanism (10).
2. The reluctance-equivalent-overlap-type slot-variable high-capacity alternating-current motor stator bar magnetic leakage simulation device according to claim 1, wherein: the electric servo driving device (11) is electrically connected with the control device (12), the electric servo driving device (11) comprises a servo motor, a speed regulator and a position sensor, and the control device (12) comprises a control panel.
3. The reluctance-equivalent-overlap-type slot-variable high-capacity alternating-current motor stator bar magnetic leakage simulation device according to claim 1, wherein: the underframe (9) is provided with a lifting device (14) for lifting the whole device.
4. The reluctance-equivalent-overlap-type slot-variable high-capacity alternating-current motor stator bar magnetic leakage simulation device according to claim 1, wherein: the fixed iron core (1) is connected with the driving mechanism (3) through a fastener (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910561074.5A CN110221205B (en) | 2019-06-26 | 2019-06-26 | Magnetic resistance equivalent overlapping type slot-changing high large alternating current motor stator bar magnetic leakage simulation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910561074.5A CN110221205B (en) | 2019-06-26 | 2019-06-26 | Magnetic resistance equivalent overlapping type slot-changing high large alternating current motor stator bar magnetic leakage simulation device |
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| Publication Number | Publication Date |
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| CN110221205A CN110221205A (en) | 2019-09-10 |
| CN110221205B true CN110221205B (en) | 2024-05-03 |
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| CN201910561074.5A Active CN110221205B (en) | 2019-06-26 | 2019-06-26 | Magnetic resistance equivalent overlapping type slot-changing high large alternating current motor stator bar magnetic leakage simulation device |
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2019
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|---|---|---|---|---|
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| EP2262079A1 (en) * | 2009-06-08 | 2010-12-15 | Alstom Technology Ltd | Roebel bar with transposed end windings |
| CN103135040A (en) * | 2012-12-25 | 2013-06-05 | 太原理工大学 | High-voltage motor stator core slot part model device |
| CN105322669A (en) * | 2015-11-17 | 2016-02-10 | 天津市天发重型水电设备制造有限公司 | Improved structure of open tooth groove of end punching sheet of generator stator core |
| CN107632182A (en) * | 2017-09-27 | 2018-01-26 | 哈尔滨理工大学 | Alternator frame bar strand current detecting system and the method for measuring strand electric current |
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