CN106052990A - New method of reducing vibrating table impedance - Google Patents
New method of reducing vibrating table impedance Download PDFInfo
- Publication number
- CN106052990A CN106052990A CN201610343372.3A CN201610343372A CN106052990A CN 106052990 A CN106052990 A CN 106052990A CN 201610343372 A CN201610343372 A CN 201610343372A CN 106052990 A CN106052990 A CN 106052990A
- Authority
- CN
- China
- Prior art keywords
- becket
- magnetic
- magnetic core
- cylinder body
- core array
- Prior art date
- 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.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
The invention discloses a new method of reducing vibrating table impedance, comprising: providing a metal ring used for a short circuit ring, wherein under a same temperature, the inner diameter of the metal ring is almost equal to the external diameter of the magnetic core of electric vibration test equipment, or the external diameter of the metal ring is almost equal to the inner diameter of the magnetic cylinder of the electric vibration test equipment; heating the metal ring until the inner diameter of the metal ring is extended to be greater than the external diameter of the magnetic core, rapidly sleeving the metal ring on the magnetic core, or heating the magnetic cylinder until the inner diameter of the magnetic cylinder is extended to be greater than the external diameter of the metal ring, and rapidly inserting the metal ring into the magnetic cylinder; and simultaneously cooling the metal ring sleeving the magnetic core and the magnetic core, allowing the metal ring and the magnetic core to form interference fit, or simultaneously cooling the metal ring inserted into the magnetic cylinder and the magnetic cylinder, allowing the magnetic cylinder and the metal ring to form interference fit. Accordingly, the method can greatly reduce equivalent impedance in an electric vibration test equipment magnetic circuit system, and optimize electric vibration test equipment work performance.
Description
Technical field
The present invention relates to a kind of electric vibration testing equipment, a kind of new method reducing vibration table impedance, belong to
Mechanical field.
Background technology
Electric vibration experiment is mainly by activity system, magnetic circuit system, elastic supporting system and guidance system and cold
Radiator cooler forms, and activity system therein is also known as moving-coil, is mainly driven coil groups by coiling on the skeleton with work top
Becoming, its operation principle is to be produced constant magnetic field by DC current by the magnet exciting coil on magnetic circuit system, is positioned at this constant magnetic
Moving-coil in Chang is affected by the alternating current generation alternating magnetic field being supplied to drive coil, wants in magnetic field according to current－carrying conductor
By the Ampere law of electromagnetic force, moving-coil vibrates in stationary magnetic field back and forth.Along with the increase of frequency of vibration, magnetic circuit system
The equiva lent impedance of system also increases, and activity system electric current in coil and the electric power driving coil to be subject to just reduce, it is possible to
The upper operational frequency limit making moving-coil reduces.
In order to change the equiva lent impedance of magnetic circuit system, generally installing short circuit inside the magnetic cylinder of magnetic circuit system and outside magnetic core
Ring.Short-circuited conducting sleeve not only can solve the equiva lent impedance problem of magnetic circuit system, and can also play increase amplitude and reduce mistake
Really act on.
The installing of conventional short-circuit ring generally uses chemical plating method, adopts the spy needed in this way at magnetic cylinder and magnetic core
Location is put and is carried out multiple chemical plating, to form enough thickness.But electroless plating is frequently accompanied by side reaction, such as, produce oxygen
Changing cuprous or copper granule, it is coarse that this granule causes coating to loosen, and easily comes off or oxidized, and then has a strong impact on leading of short-circuited conducting sleeve
Electrical property.
In prior art, another way is to form short-circuited conducting sleeve at magnetic core or one layer of copper of magnetic cylinder surfaces built-up welding, but due to copper and
Magnetic core, the linear expansion coefficient difference of magnetic cylinder, easily crack on the surface of built-up welding, and the affinity additionally, due to copper and oxygen is big,
During built-up welding, oxidation acutely, can produce the defect such as slag inclusion, pore, these formed short-circuited conducting sleeve electric conductivity all can be caused more weak and
Uncontrollable, thus the side effect such as wave distortion are caused to vibration test.
Inventor the most once proposed by offering on sheet material in the patent that publication No. is CN101118198A
Through hole, more described sheet material is curled into cylinder, then abutting edge and described cylinder after through hole, sheet material curling are upper and lower
Edge uses gas shielded arc welding that described cylinder welding is formed on stationary plane the scheme of short-circuited conducting sleeve, but because of the weldering of sheet material joint
The electric conductivity of material is often weaker than panel body part, causes the electric conductivity of formed short-circuited conducting sleeve still can not reach industry institute
The degree expected.
Therefore, industry urgently develops the new method of a kind of impedance that can reduce electrodynamic vibration equipment.
Summary of the invention
Present invention is primarily targeted at a kind of new method reducing vibration table impedance of offer, to overcome prior art not
Foot.
For realizing aforementioned invention purpose, the technical solution used in the present invention includes:
Embodiments provide a kind of new method reducing vibration table impedance, comprising:
The becket being used as short-circuited conducting sleeve, at the same temperature, the internal diameter of described becket and electric vibration testing equipment are provided
The external diameter of magnetic core array is of substantially equal, or, the external diameter of described becket is of substantially equal with the internal diameter of magnetic cylinder body；
Described becket is heated to temperature higher than magnetic core array, and makes the internal diameter of becket swell to more than electric vibration testing to set
The external diameter of standby magnetic core array, more rapidly described metal ring is set on magnetic core array,
Or, described magnetic cylinder body is heated to temperature and is higher than becket, and make the internal diameter of magnetic cylinder body swell to more than becket
External diameter, more rapidly described becket is inserted magnetic cylinder body；
And, make the becket being set on described magnetic core array cool down with magnetic core array simultaneously, form becket and magnetic core array interference
The structure coordinated, and make becket internal face fit tightly with magnetic core array outside wall surface, or, make the metal of insertion described magnetic cylinder body
Ring cools down with magnetic cylinder body simultaneously, forms the structure of magnetic cylinder body and becket interference fit, and makes becket outside wall surface and magnetic cylinder body
Internal face fits tightly.
In some preferred embodiments, described becket is tubular structure, radially projecting formation annular in its upper end edge
Structure, when described becket forms the structure of interference fit with magnetic core array, the loop configuration of described becket upper end and magnetic core
Body upper surface fits tightly.
More preferred, a plurality of vertical screw is also distributed in the loop configuration of described becket upper end, in order to pass through
Fastening bolt and magnetic core array secure bond.
In some preferred embodiments, described becket is tubular structure, and its upper end edge outer radial is prominent forms annular
Structure, when described becket forms the structure of interference fit with magnetic cylinder body, the loop configuration of described becket upper end and magnetic cylinder
Body upper surface fits tightly.
More preferred, a plurality of vertical screw is also distributed in the loop configuration of described becket upper end, in order to pass through
Fastening bolt and magnetic cylinder body secure bond.
More preferred, the regional area of described magnetic inboard wall of cylinder block bottom is along interior radially projecting formation limiting section, described gold
Belong to ring lower end to be arranged on described limiting section.
More preferred, described becket uses seamless metal ring.
More preferred, described becket uses copper ring.
More preferred, the wall thickness of described becket is 2～10mm, especially preferably 3～8mm.
Than prior art, nationality by the method for the present invention can simply, quick, low cost is at electric vibration testing equipment
Magnetic circuit system is formed there is the short-circuit ring structure of excellent conductive capability, and the short-circuited conducting sleeve formed and magnetic core array, the consolidating of magnetic cylinder body
Determine to be tightly combined between face, basic gapless, such that it is able to effectively solve the equiva lent impedance problem of magnetic circuit system, improve electric vibrating
The test accuracy of testing equipment, promotes its service life and safety coefficient simultaneously.
Accompanying drawing explanation
Fig. 1 is the mounting process schematic diagram of a kind of short-circuited conducting sleeve in the present invention one exemplary embodiments；
Fig. 2 is the mounting process schematic diagram of a kind of short-circuited conducting sleeve in another exemplary embodiments of the present invention；
Description of reference numerals: becket 1, loop configuration 11, vertical screw 12, magnetic core array 2, becket 1 ', loop configuration 11 ',
Vertically screw 12 ', magnetic cylinder body 3, limiting section 31.
Detailed description of the invention
In view of deficiency of the prior art, inventor, through studying for a long period of time and putting into practice in a large number, is proposed the present invention's
Technical scheme.As follows will in conjunction with accompanying drawing and some embodiments technical scheme, its implementation process and principle etc. made into
The explanation of one step.
Refer to shown in Fig. 1, in an exemplary embodiments of the present invention, a kind of new method bag reducing vibration table impedance
Include:
Thering is provided the becket being used as short-circuited conducting sleeve 1, at the same temperature (the most at room temperature), the internal diameter of described becket is with electronic
The external diameter of the magnetic core array 2 of vibration rig is of substantially equal；
Described becket is heated to temperature and is higher than magnetic core array, and make the internal diameter of becket swell to the external diameter more than magnetic core array,
Rapidly described metal ring is set on magnetic core array again；
And, make the becket being set on described magnetic core array and magnetic core array cool down simultaneously (the most at room temperature natural cooling or,
Or air-cooled, quenching etc.), form the structure of becket and magnetic core array interference fit, it is achieved the fastening knot of short-circuited conducting sleeve and magnetic core array
Close.
" of substantially equal " in the exemplary embodiment should be understood identical or be slightly lower than.
Referring to Fig. 1 again, the most preferably, described becket is seamless tubular structure, radially projecting shape in its upper end edge
Circularize structure 11, when described becket forms the structure of interference fit with magnetic core array, the ring junction of described becket upper end
Structure fits tightly with magnetic core array upper surface.
Especially preferred, some vertical screw 12 also can be distributed in the loop configuration of described becket upper end, in order to logical
Cross fastening bolt and magnetic core array secure bond.
Refer to again shown in Fig. 2, in another exemplary embodiments of the present invention, a kind of new method reducing vibration table impedance
Including:
The becket being used as short-circuited conducting sleeve 1 ', at the same temperature (the most at room temperature), the external diameter of described becket and electricity are provided
The internal diameter of the magnetic cylinder body 3 of dynamic vibration rig is of substantially equal；
Described magnetic cylinder body is heated to temperature and is higher than becket, and make the internal diameter of magnetic cylinder body swell to the external diameter more than becket,
Rapidly described becket is inserted magnetic cylinder body again；
And, make the becket of insertion described magnetic cylinder body and magnetic cylinder body cool down simultaneously (the most at room temperature natural cooling or or
Air-cooled, quenching etc.), form the structure of magnetic cylinder body and becket interference fit.
" of substantially equal " in the exemplary embodiment should be understood identical or be slightly larger than.
Referring to Fig. 2 again, the most preferably, described becket is seamless tubular structure, and its upper end edge outer radial highlights shape
Circularize structure 11 ', when described becket forms the structure of interference fit with magnetic cylinder body, the ring junction of described becket upper end
Structure fits tightly with magnetic cylinder upper end face.
Especially preferred, a plurality of vertical screw 12 ' is also distributed in the loop configuration of described becket upper end, in order to logical
Cross fastening bolt and magnetic cylinder body secure bond.
Wherein, the regional area of described magnetic inboard wall of cylinder block bottom is also along interior radially projecting formation limiting section, described becket
Lower end is arranged on described limiting section.
" of substantially equal " in typical embodiment discussed above should be understood identical or be slightly larger than.
Aforesaid electric vibration testing equipment can be selected from electric vibration table known to industry etc..
Can be by becket or magnetic cylinder body in inert atmosphere, vacuum environment or air atmosphere in typical embodiment discussed above
Heat, it is possible in identical atmosphere, complete becket and magnetic core array or the socket of magnetic cylinder body, interference fit.
The present invention utilizes principle of expanding with heat and contracting with cold, by the seamless short-circuited conducting sleeve set of heat is set on cold magnetic core array, or will
Cold seamless short-circuited conducting sleeve inserts in cold magnetic cylinder body, after both coolings to be joined together, make short-circuited conducting sleeve cooling meat and with
Magnetic core array closely cooperates, or makes magnetic cylinder body cooling meat closely cooperate with short-circuited conducting sleeve, in particular so that short-circuited conducting sleeve and magnetic core
At the combination interface of body or magnetic cylinder body gapless exist, such that it is able to simply, fast, the realization of low cost there is good electric conductivity
The making of the short-circuited conducting sleeve of energy, the short circuit formed than modes such as using plating, built-up welding, the protection weldering of sheet material coiling in prior art
Ring, not only without complex device and stringent process conditions, and can eliminate the internal structure that short-circuited conducting sleeve brings because of processing technology
The problems such as defect, damage, material of main part are discontinuously arranged, and then make the equivalence resistance of the magnetic circuit system of electric vibration testing equipment
Anti-problem is addressed.
Wherein, described becket inwall all preferably employs hydraulically smooth surface with the wall of magnetic core array outer wall.Or, described metal
Ring outer wall all preferably employs hydraulically smooth surface with the wall of magnetic inboard wall of cylinder block.
The material of aforementioned metal ring preferably employs has bigger effect of expanding with heat and contract with cold, and has excellent heat conductivity, conduction energy
The metal material etc. of power, such as, can use gold, silver, red copper, pyrite, beryllium copper etc., but in view of gold, silver expensive raw material price,
And the problems such as the moderate cost of red copper, pyrite, beryllium copper.Again in view of red copper, pyrite, the character of beryllium copper, such as: red copper, namely
The heat conductivity of fine copper is 386.4w/ (m.k), and when its 20 DEG C, resistivity is 0.018 Ω mm2/ m, and the heat conductivity of pyrite
For 108.9w/ (m.k), when its 20 DEG C, resistivity is 0.071 Ω mm2/m；The heat conductivity of beryllium copper is 195w/ (m.k), conduction
Rate is less than fine copper.It is advantageous to use red copper material.
Wherein, described becket preferably employs seamless metal ring, and it can use the technique such as punching press, casting to make, its wall
Thickness should be tried one's best uniformly.And, it is preferred that the wall thickness of described becket can be 2～10mm, especially preferably 3～8mm.
It should be noted that the accompanying drawing of the present embodiment all uses the form simplified very much and all uses non-ratio accurately,
It is only used for aiding in illustrating conveniently, lucidly embodiments of the invention.
Should be appreciated that above-described embodiment is only technology design and the feature of the explanation present invention, its object is to allow and be familiar with this
The personage of item technology will appreciate that present disclosure and implements according to this, can not limit the scope of the invention with this.All
The equivalence change made according to spirit of the invention or modification, all should contain within protection scope of the present invention.
Claims (10)
1. the new method reducing vibration table impedance, it is characterised in that including:
The becket being used as short-circuited conducting sleeve, at the same temperature, the internal diameter of described becket and electric vibration testing equipment are provided
The external diameter of magnetic core array is of substantially equal, or, the internal diameter base of the magnetic cylinder body of the external diameter of described becket and electric vibration testing equipment
This is equal；
Described becket is heated to temperature and is higher than magnetic core array, and make the internal diameter of becket swell to the external diameter more than magnetic core array,
Rapidly described metal ring is set on magnetic core array again,
Or, described magnetic cylinder body is heated to temperature and is higher than becket, and make the internal diameter of magnetic cylinder body swell to more than becket
External diameter, more rapidly described becket is inserted magnetic cylinder body；
And, make the becket being set on described magnetic core array cool down with magnetic core array simultaneously, form becket and magnetic core array interference
The structure coordinated, and make becket internal face fit tightly with magnetic core array outside wall surface, or, make the metal of insertion described magnetic cylinder body
Ring cools down with magnetic cylinder body simultaneously, forms the structure of magnetic cylinder body and becket interference fit, and makes becket outside wall surface and magnetic cylinder body
Internal face fits tightly.
The new method of reduction vibration table impedance the most according to claim 1, it is characterised in that: described becket is tubular knot
Structure, radially projecting formation loop configuration in its upper end edge, when described becket forms the structure of interference fit with magnetic core array, institute
The loop configuration stating becket upper end fits tightly with magnetic core array upper surface.
The new method of reduction vibration table impedance the most according to claim 2, it is characterised in that: the ring of described becket upper end
A plurality of vertical screw is also distributed, in order to by fastening bolt and magnetic core array secure bond in shape structure.
The new method of reduction vibration table impedance the most according to claim 1, it is characterised in that: described becket is tubular knot
Structure, its upper end edge outer radial is prominent forms loop configuration, when described becket forms the structure of interference fit with magnetic cylinder body, institute
The loop configuration stating becket upper end fits tightly with magnetic cylinder upper end face.
The new method of reduction vibration table impedance the most according to claim 4, it is characterised in that: the ring of described becket upper end
A plurality of vertical screw is also distributed, in order to by fastening bolt and magnetic cylinder body secure bond in shape structure.
The new method of reduction vibration table impedance the most according to claim 1, it is characterised in that: described magnetic inboard wall of cylinder block bottom
Regional area be arranged on described limiting section along interior radially projecting formation limiting section, described becket lower end.
7. according to the new method reducing vibration table impedance according to any one of claim 1-6, it is characterised in that: described metal
Ring uses seamless metal ring.
The new method of reduction vibration table impedance the most according to claim 7, it is characterised in that: described becket uses copper
Ring.
The new method of reduction vibration table impedance the most according to claim 7, it is characterised in that: the wall thickness of described becket is
2～10mm.
The new method of reduction vibration table impedance the most according to claim 7, it is characterised in that: the wall thickness of described becket
It is 3～8mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610343372.3A CN106052990B (en) | 2016-05-23 | 2016-05-23 | The method for reducing shake table impedance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610343372.3A CN106052990B (en) | 2016-05-23 | 2016-05-23 | The method for reducing shake table impedance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106052990A true CN106052990A (en) | 2016-10-26 |
| CN106052990B CN106052990B (en) | 2018-03-09 |
Family
ID=57177468
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610343372.3A Active CN106052990B (en) | 2016-05-23 | 2016-05-23 | The method for reducing shake table impedance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106052990B (en) |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55125065A (en) * | 1979-03-17 | 1980-09-26 | Fujitec Co Ltd | Short-circuit ring for squirrel-cage induction motor |
| JPH10150751A (en) * | 1996-11-19 | 1998-06-02 | Hitachi Ltd | Method and equipment for manufacturing cage rotor |
| CN101145721A (en) * | 2006-10-19 | 2008-03-19 | 余国华 | Magnetic lag synchronous motor and its making technology |
| CN201083595Y (en) * | 2007-09-25 | 2008-07-09 | 苏州东菱振动试验仪器有限公司 | Welded fastening jigging platform short-circuited conducting sleeve |
| CN201149538Y (en) * | 2007-12-04 | 2008-11-12 | 苏州试验仪器总厂 | Split type magnetic jar loop |
| CN101377446A (en) * | 2008-08-29 | 2009-03-04 | 苏州东菱振动试验仪器有限公司 | Structure and method for connecting electric oscillating table short circuit ring |
| CN201314863Y (en) * | 2008-12-01 | 2009-09-23 | 苏州苏试试验仪器有限公司 | Short circuit ring structure suitable for long-stroke electric vibration table |
| CN101593597A (en) * | 2009-04-03 | 2009-12-02 | 中国科学院电工研究所 | The stress support ring and the installation method of highfield superconducting solenoid coil |
| CN203708029U (en) * | 2013-12-30 | 2014-07-09 | 攀钢集团工程技术有限公司 | Device for positioning short-circuiting ring of motor rotor |
| CN104201842A (en) * | 2014-08-14 | 2014-12-10 | 宁波华斯特林电机制造有限公司 | Manufacturing method for coil of Stirling cycle machine |
| CN104426303A (en) * | 2013-08-21 | 2015-03-18 | 广东肇庆爱龙威机电有限公司 | Assembling method for permanent magnet direct-current motors and permanent magnet direct-current motor assembled by same |
| CN204330257U (en) * | 2014-12-22 | 2015-05-13 | 苏州景联精密机械有限公司 | The syndeton of electric vibration table central magnetic pole and short-circuited conducting sleeve |
| CN105322735A (en) * | 2015-11-28 | 2016-02-10 | 白银海佳电泵制造有限公司 | Production process of large-power submersible motor cast-aluminum rotor |
-
2016
- 2016-05-23 CN CN201610343372.3A patent/CN106052990B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55125065A (en) * | 1979-03-17 | 1980-09-26 | Fujitec Co Ltd | Short-circuit ring for squirrel-cage induction motor |
| JPH10150751A (en) * | 1996-11-19 | 1998-06-02 | Hitachi Ltd | Method and equipment for manufacturing cage rotor |
| CN101145721A (en) * | 2006-10-19 | 2008-03-19 | 余国华 | Magnetic lag synchronous motor and its making technology |
| CN201083595Y (en) * | 2007-09-25 | 2008-07-09 | 苏州东菱振动试验仪器有限公司 | Welded fastening jigging platform short-circuited conducting sleeve |
| CN201149538Y (en) * | 2007-12-04 | 2008-11-12 | 苏州试验仪器总厂 | Split type magnetic jar loop |
| CN101377446A (en) * | 2008-08-29 | 2009-03-04 | 苏州东菱振动试验仪器有限公司 | Structure and method for connecting electric oscillating table short circuit ring |
| CN201314863Y (en) * | 2008-12-01 | 2009-09-23 | 苏州苏试试验仪器有限公司 | Short circuit ring structure suitable for long-stroke electric vibration table |
| CN101593597A (en) * | 2009-04-03 | 2009-12-02 | 中国科学院电工研究所 | The stress support ring and the installation method of highfield superconducting solenoid coil |
| CN104426303A (en) * | 2013-08-21 | 2015-03-18 | 广东肇庆爱龙威机电有限公司 | Assembling method for permanent magnet direct-current motors and permanent magnet direct-current motor assembled by same |
| CN203708029U (en) * | 2013-12-30 | 2014-07-09 | 攀钢集团工程技术有限公司 | Device for positioning short-circuiting ring of motor rotor |
| CN104201842A (en) * | 2014-08-14 | 2014-12-10 | 宁波华斯特林电机制造有限公司 | Manufacturing method for coil of Stirling cycle machine |
| CN204330257U (en) * | 2014-12-22 | 2015-05-13 | 苏州景联精密机械有限公司 | The syndeton of electric vibration table central magnetic pole and short-circuited conducting sleeve |
| CN105322735A (en) * | 2015-11-28 | 2016-02-10 | 白银海佳电泵制造有限公司 | Production process of large-power submersible motor cast-aluminum rotor |
Non-Patent Citations (1)
| Title |
|---|
| 胡娟: "某火工品短路环在线检测技术的研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106052990B (en) | 2018-03-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4621358B2 (en) | Device for clamping tools | |
| US20170126084A1 (en) | Electrical hollow conductor for an electromagnetic machine | |
| KR100527482B1 (en) | Combination device using electromagnetic molding | |
| JP2009207274A (en) | Vehicle alternator | |
| US20160329141A1 (en) | Method for attaching a metal ring in a frame and induction coil obtained by said method | |
| CN101447280B (en) | Choke of electric device | |
| JP2003257611A (en) | Inside diameter face induction heating coil | |
| CN106052990A (en) | New method of reducing vibrating table impedance | |
| CN205808652U (en) | Reduce the structure of electric vibration testing equipment magnetic circuit system equiva lent impedance | |
| US11191131B2 (en) | Double-sided flat inductor assembly | |
| EP3522181A1 (en) | Heat dissipation structure for magnetic component and magnetic component having the same | |
| KR102032651B1 (en) | Hollow metal part of rotating electric machine stator, rotating electric machine, manufacturing method of hollow metal part | |
| CN206966820U (en) | A kind of air-cooled type generator unit stator winding confluxes copper ring soldering induction coil | |
| CN213366308U (en) | Anti-cracking high-strength coil inductance magnetic ring for PCB | |
| CN201425542Y (en) | Superactive water-cooling short-circuit ring structure | |
| CN209897299U (en) | Internal heating type induction heater | |
| CN101561340A (en) | Effective water cooling short-circuit ring structure | |
| CN201105353Y (en) | Low-radiation high-frequency induction-heating weld bench | |
| CN213636978U (en) | Mounting plate for mounting wall bushing | |
| JP2827089B2 (en) | High frequency heating coil | |
| JP2652755B2 (en) | High frequency heating equipment | |
| CN2473848Y (en) | Conductive induction heater for irregular work piece | |
| EA200300575A1 (en) | METHOD OF CONNECTING SHELLS WITH CORE | |
| CN210091867U (en) | Heat radiation structure for coil | |
| CN216700796U (en) | High-temperature-resistant lifting electromagnet sucker for counterweight block production |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |