CN109215968A - A kind of big sectional area iron yoke dual openings iron circuit of power equipment - Google Patents
A kind of big sectional area iron yoke dual openings iron circuit of power equipment Download PDFInfo
- Publication number
- CN109215968A CN109215968A CN201811146943.XA CN201811146943A CN109215968A CN 109215968 A CN109215968 A CN 109215968A CN 201811146943 A CN201811146943 A CN 201811146943A CN 109215968 A CN109215968 A CN 109215968A
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- China
- Prior art keywords
- iron
- yoke
- sectional area
- circuit
- core
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 360
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 147
- 230000009977 dual effect Effects 0.000 title claims abstract description 34
- 229910000976 Electrical steel Inorganic materials 0.000 claims abstract description 41
- 238000003032 molecular docking Methods 0.000 claims abstract description 6
- 238000006073 displacement reaction Methods 0.000 claims description 6
- 238000003780 insertion Methods 0.000 claims description 5
- 230000037431 insertion Effects 0.000 claims description 5
- 230000011218 segmentation Effects 0.000 claims description 2
- 230000004907 flux Effects 0.000 abstract description 14
- 239000000463 material Substances 0.000 abstract description 4
- 238000009826 distribution Methods 0.000 abstract description 3
- 239000011162 core material Substances 0.000 description 49
- 238000010586 diagram Methods 0.000 description 8
- 239000000203 mixture Substances 0.000 description 4
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/24—Magnetic cores
- H01F27/245—Magnetic cores made from sheets, e.g. grain-oriented
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/24—Magnetic cores
- H01F27/26—Fastening parts of the core together; Fastening or mounting the core on casing or support
- H01F27/263—Fastening parts of the core together
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Electromagnets (AREA)
Abstract
The invention discloses a kind of big sectional area iron yoke dual openings iron circuit of power equipment, the iron circuit is composed of one or more iron core frames；The iron core frame is polygon or right angle rectangle or the rectangle with small oblique angle, and each iron core frame is made of two U-shaped core limb docking；The U-shaped core limb is nested together by several U-shaped silicon steel sheet stacks and is constituted, and upper and lower ends form yoke piece, and the interlude of lower yoke member forms core limb in connection；Upper lower yoke member is made up of forms such as overlap joint grafting.This power equipment can improve distribution of the power equipment magnetic flux in iron core with big sectional area iron yoke dual openings iron circuit, reduce the magnetic flux density of iron yoke part, the opposite magnetic flux density for improving core limb, so that power equipment product can make full use of silicon steel piece performance in design, reduce no-load loss, noise is effectively reduced, and material consumption can be greatly lowered.
Description
Technical field
The present invention relates to power equipment manufacturing field more particularly to a kind of big sectional area iron yoke dual openings iron of power equipment
Heart magnetic circuit.
Background technique
Currently, on power equipment, such as transformer and reactor, the magnetic circuit iron core of use are mostly traditional shearing lamination
Formula iron core.Usual situation lower yoke and core limb cross-sectional area having the same.This structure is mainly due to core construction
Caused by limitation.It is essentially identical that this has resulted in the flux density of core limb and iron yoke in power plant design, so as to cause electricity
The no-load loss of power equipment is high, limits the use of core material.Simultaneously because the noise transmission of power equipment mostlys come from
Iron yoke, if iron yoke flux density is high, it is big that bring consequence is that power equipment obtains noise.In order to reduce no-load loss and noise, to use up
The magnetic flux density that may be decreased iron yoke, when carrying out product design using tradition shearing laminated core, it has to appropriate to reduce
The magnetic flux density of iron yoke is carried out while being reduced to core limb magnetic flux density, to reduce noise.Which results in core material utilization rates
Low, power equipment volume increases, and wastes material.
Summary of the invention
The technical problem to be solved by the invention is to provide one kind can be improved power equipment core material utilization rate and
It can be effectively reduced power equipment no-load loss and noise and can be effectively reduced the big sectional area iron yoke of power equipment of cost
Dual openings iron circuit.
In order to solve the above-mentioned technical problem, the present invention is achieved by the following technical solutions: a kind of power equipment use is big
Sectional area iron yoke dual openings iron circuit, the iron circuit are composed of one or more iron core frames, and the iron core frame is
Polygon or right angle rectangle or the rectangle with small oblique angle, each iron core frame are made of two U-shaped core limb docking；The U
Sections stem is nested together by several U-shaped silicon steel sheet stacks and is constituted, and upper and lower ends form yoke piece, the interlude of lower yoke member in connection
Form core limb.
Preferably, the silicon steel sheet for forming core limb on the U-shaped core limb closely sticks together, the entirety of yoke piece is formed
Or part silicon steel sheet, there are grafting gaps with each other；The iron core frame is plugged on mutually by two U-shaped core limbs by yoke piece
It constitutes together, the yoke piece after grafting compresses mutually, forms iron yoke, and the cross-sectional area of the iron yoke is greater than the cross-sectional area of core limb.
Preferably, the silicon steel sheet for forming core limb on the U-shaped core limb closely sticks together, the entirety of yoke piece is formed
Or part silicon steel sheet, there are grafting gaps with each other；The iron core frame is docked at one by yoke piece by two U-shaped core limbs
Rise, other silicon steel sheet be then inserted into gap and is constituted, the silicon steel sheet that yoke piece clamps insertion forms iron yoke, the iron yoke it is transversal
Area is greater than the cross-sectional area of core limb.
Preferably, the silicon steel sheet that core limb is formed on the U-shaped core limb closely sticks together, one of composition yoke piece
Divide silicon steel sheet, with each other there are grafting gap, another part is with each other without gap, but there are fissure of displacement lap positions；It is described
Iron core frame is made up of two U-shaped core limbs yoke piece grafting mixing overlap joint, and wherein there are the part phases in grafting gap for yoke on piece
Mutual grafting mutually overlaps there are the part of fissure of displacement lap position and forms iron yoke, and the cross-sectional area of the iron yoke is greater than the cross of core limb
Sectional area.
Preferably, the iron core frame has one, two column iron circuit of single frame is constituted.
Preferably, arranged in parallel together, constitutes two frames, three column iron circuit there are two the iron core frame tools.
Preferably, one nests together outside including two, constitutes three frames, three column there are three the iron core frame tools
Iron circuit.
Preferably, arranged in parallel together, constitutes four frames, five column iron circuit there are four the iron core frame tools；It is described
There are two four frames, five column iron circuit tools, arranged in parallel, between by the way that silicon steel sheet is lateral be successively inserted into two four frames, five columns
In the mutual corresponding iron yoke of iron circuit, eight lateral connection iron yokes are constituted, the connection iron yoke is by two three frames, five column iron cores
It links together, constitutes the double iron core bridge connected iron circuits for being used for magnet controlled reactor.
Preferably, on the U-shaped core limb silicon steel sheet segmentation disconnect or silicon steel sheet have inside core limb it is several
It disconnects, forms air-gap.
Compared with prior art, the invention has the beneficial effects that: the big sectional area iron yoke dual openings of this power equipment
Iron circuit can improve distribution of the power equipment magnetic flux in iron core, reduce the magnetic flux density of iron yoke part, opposite to improve iron
The magnetic flux density of stem reduces unloaded damage so that power equipment product can make full use of silicon steel piece performance in design
Consumption, is effectively reduced noise, and material consumption can be greatly lowered.
Detailed description of the invention
The following further describes the present invention with reference to the drawings.
Fig. 1 is that a kind of power equipment of the present invention is shown with U-shaped iron core rod structure in big sectional area iron yoke dual openings iron circuit
It is intended to；
Fig. 2 and Fig. 3 is a kind of big 1 structural representation of sectional area iron yoke dual openings iron circuit embodiment of power equipment of the invention
Figure；
Fig. 4 and Fig. 5 is a kind of big 2 structural representation of sectional area iron yoke dual openings iron circuit embodiment of power equipment of the invention
Figure；
Fig. 6 and Fig. 7 is a kind of big 3 structural representation of sectional area iron yoke dual openings iron circuit embodiment of power equipment of the invention
Figure；
Fig. 8 and Fig. 9 is a kind of big 4 structural representation of sectional area iron yoke dual openings iron circuit embodiment of power equipment of the invention
Figure；
Figure 10 and Figure 11 is a kind of big 5 structural representation of sectional area iron yoke dual openings iron circuit embodiment of power equipment of the invention
Figure；
Figure 12 is that a kind of power equipment of the present invention is inserted with rectangle iron core frame iron yoke in big sectional area iron yoke dual openings iron circuit
Connect fabricated structure schematic diagram；
Figure 13 is that a kind of power equipment of the present invention is inserted with polygon iron core frame iron yoke in big sectional area iron yoke dual openings iron circuit
Connect fabricated structure schematic diagram；
Figure 14 is a kind of power equipment rectangle iron core frame iron yoke pair in big sectional area iron yoke dual openings iron circuit of the present invention
Patch piece schematic diagram；
Figure 15 is a kind of power equipment polygon iron core frame iron yoke pair in big sectional area iron yoke dual openings iron circuit of the present invention
Patch piece schematic diagram；
Figure 16 is that a kind of power equipment of the present invention is inserted with rectangle iron core frame iron yoke in big sectional area iron yoke dual openings iron circuit
Connect overlap joint hybrid mode schematic diagram；
Figure 17 is that a kind of power equipment of the present invention is inserted with shape changeable iron core frame iron yoke in big sectional area iron yoke dual openings iron circuit
Connect overlap joint hybrid mode schematic diagram；
Figure 18 is to invent a kind of power equipment cross-section gap structure of core limb U-shaped in big sectional area iron yoke dual openings iron circuit
Schematic diagram；
Figure 19 is to invent a kind of power equipment gap structure built in U-shaped core limb in big sectional area iron yoke dual openings iron circuit
Schematic diagram.
In figure: 1, U-shaped core limb；2, yoke piece；3, iron yoke；4, two column iron circuit of single frame；5, two frames, three column iron circuit；
6, three frames, three column iron circuit；7, four frames, five column iron circuit；8, double iron core bridge connected iron circuits；9, iron yoke is connected；10, empty
Air gap.
Specific embodiment
The present invention will be described in detail with reference to the accompanying drawings and detailed description.
A kind of big sectional area iron yoke dual openings iron circuit of power equipment, the iron circuit is by one or more iron cores
Frame is composed, and the iron core frame is polygon or right angle rectangle or the rectangle with small oblique angle, and each iron core frame is by two U
The docking composition of sections stem 1；It is constituted as shown in Figure 1, the U-shaped core limb 1 is nested together by several U-shaped silicon steel sheet stacks, thereon
Lower both ends form yoke piece 2, and the interlude of lower yoke member 2 forms core limb in connection.
Each iron core frame is by two U-shaped core limbs 1 by being mutually inserted, and perhaps mutually overlap joint or docking presss from both sides insertion
Silicon steel sheet or the grafting mode mixed with overlap joint are composed, and concrete mode is as follows:
As shown in Figure 12 and Figure 13, when iron core frame is composed of two U-shaped core limbs 1 by mutually plugging, mode is such as
Under: the silicon steel sheet that core limb is formed on the U-shaped core limb 1 closely sticks together, and forms the silicon steel in whole or in part of yoke piece 2
Piece, there are grafting gaps with each other；The iron core frame is plugged in together mutually structure by yoke piece 2 by two U-shaped core limbs 1
At the yoke piece 2 after grafting compresses mutually, forms iron yoke 3, and the cross-sectional area of the iron yoke 3 is greater than the cross-sectional area of core limb.
As shown in Figure 14 and Figure 15, when iron core frame is combined by two U-shaped core limbs 1 by being mutually butted folder insertion silicon steel sheet
Into when, mode is as follows: the silicon steel sheet that core limb is formed on the U-shaped core limb 1 closely sticks together, composition yoke piece 2
Silicon steel sheet in whole or in part, there are grafting gaps with each other；The iron core frame is docked by two U-shaped core limbs 1 by yoke piece 2
Together, other silicon steel sheet is then inserted into gap to constitute, the silicon steel sheet that yoke piece 2 clamps insertion forms iron yoke 3, the iron yoke
3 cross-sectional area is greater than the cross-sectional area of core limb.
As shown in Figure 16 and Figure 17, when iron core frame by two U-shaped core limbs 1 by mutually plug with overlap joint hybrid combining and
Cheng Shi, mode are as follows: the silicon steel sheet that core limb is formed on the U-shaped core limb 1 closely sticks together, and the one of composition yoke piece 2
Part silicon steel sheet, with each other there are grafting gap, another part is with each other without gap, but there are fissure of displacement lap positions；Institute
It states iron core frame and is made up of two U-shaped core limbs 12 grafting of yoke piece mixing overlap joint, wherein there are the portions in grafting gap on yoke piece 2
Divide and be mutually inserted, mutually overlapped there are the part of fissure of displacement lap position and form iron yoke 3, the cross-sectional area of the iron yoke 3 is greater than iron core
The cross-sectional area of column.
Using the iron core frame of above-mentioned all kinds of combining forms, set according to the electric power that the quantity of iron core frame can form following scheme
Spare big sectional area iron yoke dual openings iron circuit.
Embodiment one
As shown in Figures 2 and 3, the iron core frame has one, constitutes two column iron circuit 4 of single frame, the two column iron core magnetic of single frame
Road 4 is used for Monophase electric power equipment；Iron core frame in described Fig. 2 is rectangle, and the iron core frame in Fig. 3 is polygon.
Embodiment two
As shown in Figure 4 and Figure 5, there are two the iron core frame tools, arranged in parallel together, constitutes two frames, three column iron circuit 5, should
Two frames, three column iron circuit 5 is used for Monophase electric power equipment；Iron core frame in described Fig. 4 is rectangle, and the iron core frame in Fig. 5 is more
Side shape.
Embodiment three
As shown in Figure 6 and Figure 7, there are three the iron core frame tools, one nests together outside including two, constitutes three frames three
Column iron circuit 6, three frames, the three column iron circuit 6 are used for three-phase electric power apparatus；Iron core frame in described Fig. 6 is rectangle, Fig. 7
In iron core frame be polygon.
Example IV
As shown in Figure 8 and Figure 9, there are four the iron core frame tools, arranged in parallel together, constitutes four frames, five column iron circuit 7, should
Four frames, five column iron circuit 7 is used for three-phase electric power apparatus；Iron core frame in described Fig. 8 is rectangle, and the iron core frame in Fig. 9 is more
Side shape.
Embodiment five
As shown in Figure 10 and Figure 11, prepare example IV described in four frames, five column iron circuit 7 two, arranged in parallel, between lead to
It crosses silicon steel sheet to be laterally successively inserted into the mutual corresponding iron yoke 3 of two four frames, five column iron circuit, constitutes eight lateral connections
Iron yoke 9, the connection iron yoke 9 link together two three frames, five column iron cores, constitute the double iron core bridges for being used for magnet controlled reactor
Connect formula iron circuit；Iron core frame in described Figure 10 is rectangle, and the iron core frame in Figure 11 is polygon.
Iron core frame used in above-described embodiment one to embodiment five, the silicon steel sheet on U-shaped core limb 1, which is segmented, to be disconnected,
Several air-gaps 10 are formed, the iron circuit constituted is used for reactor, is detailed in attached drawing 18；Or the silicon on U-shaped core limb 1
Steel disc has several disconnections inside core limb, and inside forms several air-gaps 10, so that self-shielding type air gap iron-core column is formed,
Its iron circuit constituted can be used for reactor, be detailed in attached drawing 19.
This power equipment can improve power equipment magnetic flux in iron core with big sectional area iron yoke dual openings iron circuit
Distribution, reduce the magnetic flux density of iron yoke part, the opposite magnetic flux density for improving core limb, so that power equipment product exists
Silicon steel piece performance can be made full use of when design, reduced no-load loss, noise is effectively reduced, and material can be greatly lowered
Consumption.
It is emphasized that: the above is only presently preferred embodiments of the present invention, not make in any form to the present invention
Limitation, any simple modification, equivalent change and modification to the above embodiments according to the technical essence of the invention,
All of which are still within the scope of the technical scheme of the invention.
Claims (9)
1. a kind of big sectional area iron yoke dual openings iron circuit of power equipment, it is characterised in that: the iron circuit is by one
Or multiple iron core frames are composed, the iron core frame is polygon or right angle rectangle or the rectangle with small oblique angle, Mei Getie
Heart frame is made of two U-shaped core limb (1) docking；The U-shaped core limb (1) is nested together by several U-shaped silicon steel sheet stacks to be constituted,
Its upper and lower ends forms yoke piece (2), and the interlude of lower yoke member (2) forms core limb in connection.
2. the big sectional area iron yoke dual openings iron circuit of power equipment according to claim 1, it is characterised in that: described
The silicon steel sheet that core limb is formed on U-shaped core limb (1) closely sticks together, and forms the silicon steel sheet in whole or in part of yoke piece (2),
There are grafting gaps with each other；The iron core frame is plugged in together mutually by yoke piece (2) by two U-shaped core limbs (1) and is constituted,
Yoke piece (2) after grafting compresses mutually, is formed iron yoke (3), and the cross-sectional area of the iron yoke (3) is greater than the cross-sectional area of core limb.
3. the big sectional area iron yoke dual openings iron circuit of power equipment according to claim 1, it is characterised in that: described
The silicon steel sheet that core limb is formed on U-shaped core limb (1) closely sticks together, and forms the silicon steel sheet in whole or in part of yoke piece (2),
There are grafting gaps with each other；The iron core frame is docking together by two U-shaped core limbs (1) by yoke piece (2), then in sky
It is inserted into other silicon steel sheet in gap to constitute, the silicon steel sheet that yoke piece (2) clamps insertion forms iron yoke (3), the cross section of the iron yoke (3)
Product is greater than the cross-sectional area of core limb.
4. the big sectional area iron yoke dual openings iron circuit of power equipment according to claim 1, it is characterised in that: described
The silicon steel sheet that core limb is formed on U-shaped core limb (1) closely sticks together, and forms a part of silicon steel sheet of yoke piece (2), mutually
Between there are grafting gap, another part is with each other without gap, but there are fissure of displacement lap positions；The iron core frame is U-shaped by two
Core limb (1) is made up of yoke piece (2) grafting mixing overlap joint, and wherein there are the parts in grafting gap to be mutually inserted on yoke piece (2),
It is mutually overlapped there are the part of fissure of displacement lap position and forms iron yoke (3), the cross-sectional area of the iron yoke (3) is greater than the transversal of core limb
Area.
5. the big sectional area iron yoke dual openings iron circuit of power equipment according to claim 1, it is characterised in that: described
Iron core frame has one, constitutes two column iron circuit (4) of single frame.
6. the big sectional area iron yoke dual openings iron circuit of power equipment according to claim 1, it is characterised in that: described
There are two iron core frame tools, and arranged in parallel together, constitutes two frames, three column iron circuit (5).
7. the big sectional area iron yoke dual openings iron circuit of power equipment according to claim 1, it is characterised in that: described
There are three iron core frame tools, and one nests together outside including two, constitutes three frames, three column iron circuit (6).
8. the big sectional area iron yoke dual openings iron circuit of power equipment according to claim 1, it is characterised in that: described
There are four iron core frame tools, and arranged in parallel together, constitutes four frames, five column iron circuit (7)；Four frames, the five column iron circuit (7)
There are two tools, arranged in parallel, between by silicon steel sheet laterally be successively inserted into two four frames, five column iron circuit correspond to each other
Iron yoke (3) in, constitute eight lateral connection iron yokes (9), two three frames, five column iron cores are connected to one by the connection iron yoke (9)
It rises, constitutes the double iron core bridge connected iron circuits for being used for magnet controlled reactor.
9. the big sectional area iron yoke dual openings iron circuit of power equipment according to claim 1, it is characterised in that: described
Silicon steel sheet segmentation on U-shaped core limb (1) disconnects or silicon steel sheet has several disconnections inside core limb, forms air-gap
(10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811146943.XA CN109215968A (en) | 2018-09-29 | 2018-09-29 | A kind of big sectional area iron yoke dual openings iron circuit of power equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811146943.XA CN109215968A (en) | 2018-09-29 | 2018-09-29 | A kind of big sectional area iron yoke dual openings iron circuit of power equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109215968A true CN109215968A (en) | 2019-01-15 |
Family
ID=64982349
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811146943.XA Pending CN109215968A (en) | 2018-09-29 | 2018-09-29 | A kind of big sectional area iron yoke dual openings iron circuit of power equipment |
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| Country | Link |
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| CN (1) | CN109215968A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110517879A (en) * | 2019-09-26 | 2019-11-29 | 苏州翰为电气科技有限公司 | A kind of power equipment body packaging technology |
| CN110611384A (en) * | 2019-09-12 | 2019-12-24 | 华中科技大学 | Magnetic circuit decomposition type vernier permanent magnet motor |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201348916Y (en) * | 2008-12-01 | 2009-11-18 | 广州市番禺明珠电器有限责任公司 | Amorphous alloy transformer core structure |
| CN103366928A (en) * | 2013-08-08 | 2013-10-23 | 韩宝华 | Double-opening magnetic electric equipment iron core component body |
| CN209087525U (en) * | 2018-09-29 | 2019-07-09 | 苏州翰为电气科技有限公司 | The big sectional area iron yoke dual openings iron circuit of power equipment |
-
2018
- 2018-09-29 CN CN201811146943.XA patent/CN109215968A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201348916Y (en) * | 2008-12-01 | 2009-11-18 | 广州市番禺明珠电器有限责任公司 | Amorphous alloy transformer core structure |
| CN103366928A (en) * | 2013-08-08 | 2013-10-23 | 韩宝华 | Double-opening magnetic electric equipment iron core component body |
| CN209087525U (en) * | 2018-09-29 | 2019-07-09 | 苏州翰为电气科技有限公司 | The big sectional area iron yoke dual openings iron circuit of power equipment |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110611384A (en) * | 2019-09-12 | 2019-12-24 | 华中科技大学 | Magnetic circuit decomposition type vernier permanent magnet motor |
| CN110517879A (en) * | 2019-09-26 | 2019-11-29 | 苏州翰为电气科技有限公司 | A kind of power equipment body packaging technology |
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