CN104992827A - Liquid magnetic transformer - Google Patents
Liquid magnetic transformer Download PDFInfo
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- CN104992827A CN104992827A CN201510436066.XA CN201510436066A CN104992827A CN 104992827 A CN104992827 A CN 104992827A CN 201510436066 A CN201510436066 A CN 201510436066A CN 104992827 A CN104992827 A CN 104992827A
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- resolver
- rotating part
- transformer
- magnetic core
- magnetic
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Abstract
A Liquid magnetic transformer comprises a fixed portion, a rotary portion, a liquid magnet and a sealed housing. The fixed portion and the rotary portion are disposed in the sealed housing. The liquid magnet is filled, in the sealed housing, wherein the liquid magnet is filled between the fixed portion and the rotary portion, and in gaps between the fixed and rotary portion and the sealed housing. According to the liquid magnetic transformer, the liquid magnet is filled in the transformer, requirement for shake precision of the transformer can be greatly reduced, and the production efficiency and performance of the transformer can be raised.
Description
Technical field
The present invention relates to transformer technology field, be specifically related to a kind of liquid magnetic transformer.
Background technology
Different spatialities is in and under the two needs the environment of transmitting energy or signal at two kinds of equipment, such as equipment is fixed, another is when rotating, and resolver, photoelectricity transmission or electric induction transmission (capacitive transmission) mode generally can be adopted to realize.
In three kinds of transmission meanss, photoelectricity transmission, because of efficiency low (generally can only reach 18%), is transmitted so be only applicable to small-signal; Condenser type transmission means is because of himself defect, and under being only suitable for being used in very high (generally reaching tens of million to the several G) condition of frequency, frequency is once drop to very low, and capacitive transmission equipment will bulky, weak effect and being abandoned.And applicability is the strongest, using the widest, is resolver.Resolver can use under rather low-frequency environment, also can transmit the energy of relatively high power, furthermore low price, makes it original bright spot and gains great popularity.
But resolver also has the shortcoming of self, it is the most scabrous is exactly requiring very strict occasion to signal jitter, because of the trueness error of mechanical structure self, non-uniform phenomenon in coupling energy process can be produced, when rotated, because of the trueness error of mechanical structure, the distance between rotating part and standing part and orientation can be made to produce skew, during Energy Transfer, interference can be produced because of this shake fast, original waveform is superimposed with this interference, and impact uses.
Summary of the invention
For solving the problem, the invention provides a kind of liquid magnetic transformer, by adding the mode of liquid magnetic in transformer, the shake precision requirement of transformer being reduced greatly, reduce interference, improve the performance of production efficiency and equipment.
The invention provides a kind of liquid magnetic transformer, described transformer comprises, standing part, rotating part, liquid magnetic, can;
Described standing part and rotating part are arranged in a can, and described liquid magnetic is filled in described can, for filling between described standing part and rotating part, and standing part and the space between rotating part and can.
As can be seen from the above technical solutions, the embodiment of the present invention has the following advantages:
1, by said method, the rotating part of transformer and standing part are arranged in a can, in shell, space is filled with liquid magnetic, and the rotating part of transformer rotates in liquid magnetic, and the shake gap in rotation is filled by liquid magnetic.The permeability of liquid magnetic is much higher than air, good liquid magnetic permeability is more than 1800 times of air, and therefore jitter rate reduces greatly, thus greatly reduces self shake precision requirement of resolver, reduce electromagnetic interference, improve the performance of production efficiency and equipment.
2, simultaneously, due to the mode adopting liquid magnetic to fill, thus decrease leakage inductance, improve coupling performance.
3, in addition, by adopting the mode of liquid underfill, because the standing part of transformer is what to separate with rotating part, standing part is fixed on equipment, only rotating part can be changed, when transformer is installed, for reaching and originally close parameter when rotating part damages, sometimes adjust number of times and reach hundreds of times, just can reach the state with original parameter similar.After adopting transformer of the present invention, originally close parameter can easily be adjusted to.
4, because described resolver also comprises sealing device, described sealing device is positioned at described rotation axis through the intersection of seal casinghousing, for stoping when rotating liquid magnetic in the leakage of rotation axis periphery.
5, owing to adopting bearing that rotation axis rotary resistance can be made less, rotate more steady.
6, the mode owing to adopting magnetic core to add coil, therefore than adopting separately the mode of coil to reduce cost.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of the liquid magnetic transformer of the embodiment of the present invention
Fig. 2 is the structural representation of the rotating part of the liquid magnetic transformer of the another kind of embodiment of the present invention;
Fig. 3 is the structural representation of the standing part of the liquid magnetic transformer of the another kind of embodiment of the present invention;
Fig. 4 is the secondary coil of the specific embodiment of the invention and the decomposing schematic representation of magnetic core;
Fig. 5 is the primary coil of the specific embodiment of the invention and the decomposing schematic representation of magnetic core;
Embodiment
The present invention proposes a kind of liquid magnetic transformer, mainly being applicable to the Energy Transfer between fixing and mobile device or Signal transmissions, by adding the mode of liquid magnetic in transformer, the shake precision requirement of transformer being reduced greatly, reduce interference, improve the performance of production efficiency and equipment.
Below in conjunction with the Figure of description in the present invention, be clearly and completely described the technical scheme in invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
In this specific embodiment, for convenience of understanding, carrying out the detailed description of embodiment for resolver, should be noted that, the present invention is not limited to resolver, and the transformer (as Split type transformer) anyly have vibration, having relative displacement is all applicable.
Embodiment one,
As shown in Figure 1, the invention provides a kind of liquid magnetic transformer, described transformer comprises: standing part, rotating part, liquid magnetic, can.
Described standing part and rotating part are arranged in a can, and described liquid magnetic is filled in described can, for filling between described standing part and rotating part, and the space between standing part and rotating part analogy can.
By said method, the rotating part of transformer and standing part are arranged in a can, in shell, space is filled with liquid magnetic, and the rotating part of transformer rotates in liquid magnetic, and the shake gap in rotation is filled by liquid magnetic.The permeability of liquid magnetic is much higher than air, good liquid magnetic permeability is more than 1800 times of air, and therefore jitter rate reduces greatly, thus greatly reduces self shake precision requirement of resolver, reduce electromagnetic interference, improve the performance of production efficiency and equipment.
Meanwhile, due to the mode adopting liquid magnetic to fill, thus decrease leakage inductance, improve coupling performance.
In addition, by adopting the mode of liquid underfill, because the standing part of transformer is what to separate with rotating part, standing part is fixed on equipment, only rotating part can be changed, when transformer is installed, for reaching and originally close parameter when rotating part damages, sometimes adjust number of times and reach hundreds of times, just can reach the state with original parameter similar.After adopting transformer of the present invention, originally close parameter can easily be adjusted to.
Embodiment two,
For convenience of understanding, for the resolver in transformer, further describe technical scheme of the present invention.
As shown in Figure 2, be the structural representation of the rotating part of resolver.Described resolver comprises, resolver rotating part, resolver standing part, resolver can 23, liquid magnetic 24.
Described resolver rotating part comprises, rotation axis 211, secondary coil 212; Described rotation axis 221 one end is fixedly connected with described secondary coil 222, is rotated and then drive described secondary coil 222 synchronous axial system by driven by motor rotation axis.
Described resolver standing part comprises, primary coil 221; During resolver work, primary coil 221 is standing parts, does not participate in rotating.Described primary coil 221 can be fixed on described can 23.
Described resolver can 23 is arranged on outside described resolver rotating part, resolver standing part, liquid magnetic 24 is filled in described can, for to fill between resolver rotating part, resolver standing part and and can between space, that is to say for fill between coil 221,222 and and can 23 between space.
As shown in Figure 3, in certain embodiments, described resolver also comprises sealing device 25, and described sealing device 25 is positioned at the intersection of described rotation axis 211 through seal casinghousing 23, for stoping when rotating liquid magnetic 24 in the leakage of rotation axis 211 periphery.Described sealing device can comprise: water seal, rubber seal, various encapsulating method of sealing with wax etc., described encapsulating method belongs to prior art, does not repeat them here.
As shown in Figure 3, in certain embodiments, the rotating part of described resolver also comprises at least one bearing 213, and described bearing 213 is arranged on rotation axis 211, and described rotation axis 211 can rotate in described bearing 213; Described bearing 213 with can 23 for bracing frame is fixed on can 23.Adopt bearing that rotation axis rotary resistance can be made less, rotate more steady.
As shown in Fig. 3,4,5, in certain embodiments, described rotating part also comprises secondary magnetic core 214, and rotation axis 211 connects motor, is rotated by driven by motor; Secondary magnetic core 214 is fixed on rotation axis 211, and when rotation axis 211 rotates, secondary magnetic core 214 is synchronous axial system along with the rotation of rotation axis 211; Secondary coil 212 is embedded in secondary magnetic core 214, and exposed and described standing part nearside, with secondary magnetic core 214 synchronous axial system.Described standing part also comprises elementary magnetic core 222, and described primary coil 221 is embedded in elementary magnetic core 222.The mode adopting magnetic core to add coil reduces cost than adopting separately the mode of coil.
Elementary magnetic core 222 and secondary magnetic core 214 are two magnetic cores that diameter is identical, performance is identical, and during installation, center line is coaxial; Elementary magnetic core 222 and secondary magnetic core 214 concentric are arranged, and when secondary magnetic core 214 is rotated, each angle all keeps relative position constant with elementary magnetic core 222.Secondary coil 212 and primary coil 221 position coaxially overlap in a confronting relationship, ensure when secondary magnetic core 214 is rotated, secondary coil 212 and primary coil 221 relative position constant.
Further, as shown in Figure 4,5, described secondary magnetic core 214 and elementary magnetic core 222 are annular, and the two opposite face arranges cannelure, and described secondary coil 212 and primary coil 221 are embedded in described cannelure.
In sum, during work, the elementary magnetic core of standing part, secondary coil, can are that standing part is motionless.The rotation axis of rotating part, secondary magnetic core, secondary coil rotate.AC energy is coupled to secondary from resolver elementary, or from secondary be coupled to elementary.
In the resolver course of work, primary coil is ideally coupled for lossless with the coupled relation of secondary coil, and coupling coefficient K is 1, that is:
(S11)
2+ (S21)
2=k=1, wherein, S11 represents reflected wave, and S21 represents transmission coefficient
But in fact, this parameter is less than 1, because there is the existence of several factors in transmitting procedure, the factor wherein had the greatest impact is exactly the Q value of core material, and Q value affects magnetic core own loss.
And to signal transmission network, S21 is the bigger the better, S11 is the smaller the better, and ideally S21 is 1, S11 is zero.But in fact S11 is greater than zero, the factor wherein had the greatest impact is exactly the size of leakage inductance.
We have just summed up like this, affect that this kind of transformer is most important two factors:
1, the Q value of magnetic material, this parameter determines the size of the own loss energy of magnetic material;
2, leakage inductance size, this is the important factor in order determining transformer S11 and S22 parameter, then has influence on S21 and S22;
For factor 1, we solve by the mode of preferred magnetic material, and this is fairly simple, little to the requirement of technique, and material is once selected, and Q value just changes hardly.
And for influencing factor, leakage inductance size.By desirable design, when sub section rotates, transmission 3, secondary magnetic core, secondary coil are around axle center smooth rotation, and its radial direction does not all change completely with lateral attitude.At this moment the permeability u of transformer is one and stablizes constant parameter, and this is best a kind of state.During actual motion, because gap (otherwise cannot rotate) all can be had between various bearing outside diameter and internal diameter, between steel ball and internal-and external diameter, the size in this gap is relevant with the quality of bearing, same producer, bearing between same batch also have difference, and high-quality bearing is greatly between 1um-10us; Meanwhile, the straight error (being also bending error) of rotation axis 3 also cannot accomplish zero, in any case be also all have small bending; All these machine error parameters, cause reality operationally, secondary magnetic core 4 and secondary coil 5, and gap between elementary magnetic core 6 and primary coil 7 and position be fast, small change.Although this change is little, naked eyes are not seen, concerning magnetic flux u, but individual very important significant impact.The permeability of air only has several one thousandths of magnetic core, and at work, the magnetomotive force of transformer is almost complete on air gap, and can find out according to H=B/u, the stored energy of magnetic core and H are proportional relations, W=VuH
2, V is volume, and air gap stores the energy of the overwhelming majority thus.And the mode by filling with liquid magnetic, can overcome and above-mentionedly store the drawback that most energy brings due to air gap.
For the impact of shake, suppose that resolver is without liquid magnetic, replaces with air.If primary part and sub section are 5us at a distance of gap.Various shake has 50ns (0.05us), at this moment on the impact of transmission is:
Parameters jitter rate=0.05/5* (u
gas/ u
magnetic)
U
gasit is the permeability of air gap; U
magneticit is the permeability of core gaps.Due to several thousand times greatly (about 2-4 thousand times) of the ratio air of this parameter of magnetic core, can find out thus, even if distance has only changed 1% (0.05/5=0.01) outwardly, and actual permeability has changed decades of times, at this moment reflected wave S11 increases rapidly, and transmission coefficient S21 reduces rapidly, Here it is in the secondary most important factor that there will be signal jitter.
In the cavity of sealing, poured into liquid magnetic, primary part and sub section are filled with liquid magnetic.The permeability of liquid magnetic is much higher than air, and good liquid magnetic permeability is more than 1800 times of air, so according to formula above, the change of identical distance, jitter rate reduces greatly.
In certain embodiments, the mobility of described liquid magnetic is corresponding with the velocity of rotation of described rotating part.If transformer secondary coil and magnetic core rotating speed are very fast, should select fluidity large, the liquid magnetic of permeability slightly low (the large permeability of fluidity can reduce); If secondary coil and magnetic core rotating speed are comparatively slow, just select the liquid magnetic that slightly thick permeability is large.
In certain embodiments, as being used in the huge environment of temperature change, have the gap for thermal expansion between described liquid magnetic and described can, namely liquid magnetic does not fill whole can, leave some gaps, be convenient to thermal expansion; Or arrange on can and collapse air cavity.
Above the liquid magnetic transformer of one provided by the present invention is described in detail, for one of ordinary skill in the art, according to the thought of the embodiment of the present invention, all will change in specific embodiments and applications, therefore, this description should not be construed as limitation of the present invention.
Claims (10)
1. a liquid magnetic transformer, is characterized in that, described transformer comprises, standing part, rotating part, liquid magnetic, can;
Described standing part and rotating part are arranged in a can, and described liquid magnetic is filled in described can, for filling between described standing part and rotating part, and standing part and the space between rotating part and can.
2. transformer according to claim 1, is characterized in that, described transformer is resolver.
3. transformer according to claim 2, is characterized in that, described resolver comprises, resolver rotating part, resolver standing part, resolver can, liquid magnetic;
Described resolver rotating part comprises, rotation axis, secondary coil, and described rotation axis one end connects described secondary coil, drives described secondary coil synchronous axial system;
Described resolver standing part comprises, primary coil;
Described resolver can is arranged on outside described resolver rotating part, resolver standing part, liquid magnetic is filled in described can, for fill between resolver rotating part and resolver standing part and and can between space.
4. the transformer according to Claims 2 or 3, is characterized in that, described resolver also comprises sealing device, and described sealing device is positioned at the intersection that described rotation axis passes through described seal casinghousing, for preventing the leakage of described liquid magnetic.
5. the transformer according to Claims 2 or 3, is characterized in that, the rotating part of described resolver also comprises at least one bearing, and described bearing is installed on the rotating shaft, and described rotation axis can rotate in described bearing; Described bearing is fixed on described can.
6. transformer according to claim 3, is characterized in that, described rotating part also comprises secondary magnetic core, and described secondary magnetic core is fixedly connected with described rotation axis, along with described rotation axis synchronous axial system; Described secondary coil is embedded in described secondary magnetic core; Described standing part also comprises elementary magnetic core, and described primary coil is embedded in elementary magnetic core.
7. transformer according to claim 6, is characterized in that, described elementary magnetic core is identical with secondary magnetic core, and concentric is arranged.
8. transformer according to claim 6, is characterized in that, described secondary magnetic core and elementary magnetic core are annular, and the two opposite face arranges cannelure, and described secondary coil and primary coil are embedded in described cannelure.
9. transformer according to claim 1 and 2, is characterized in that, the mobility of described liquid magnetic is corresponding with the velocity of rotation of described rotating part.
10. transformer according to claim 1 and 2, is characterized in that, has the gap for thermal expansion between described liquid magnetic and described can.
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| CN201510436066.XA CN104992827B (en) | 2015-07-23 | 2015-07-23 | A kind of liquid magnetic transformer |
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| CN201510436066.XA CN104992827B (en) | 2015-07-23 | 2015-07-23 | A kind of liquid magnetic transformer |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10189375A (en) * | 1996-12-24 | 1998-07-21 | Diamond Electric Mfg Co Ltd | Electromagnetic device |
| JP2002217042A (en) * | 2001-01-18 | 2002-08-02 | Nec Tokin Corp | Inductance component and manufacturing method thereof |
| CN101651017A (en) * | 2009-01-14 | 2010-02-17 | 郑州乾新电子有限公司 | Liquid-magnetism filled high-frequency transformer |
| CN102226958A (en) * | 2011-03-11 | 2011-10-26 | 深圳市五洲龙汽车有限公司 | Rotary transformer fixed structure and hybrid electric vehicle |
| CN202405060U (en) * | 2011-12-24 | 2012-08-29 | 车晋绥 | Magnetic liquid transformer |
| US20120218069A1 (en) * | 2011-02-28 | 2012-08-30 | GM Global Technology Operations LLC | High frequency rotary transformer for synchronous electrical machines |
-
2015
- 2015-07-23 CN CN201510436066.XA patent/CN104992827B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10189375A (en) * | 1996-12-24 | 1998-07-21 | Diamond Electric Mfg Co Ltd | Electromagnetic device |
| JP2002217042A (en) * | 2001-01-18 | 2002-08-02 | Nec Tokin Corp | Inductance component and manufacturing method thereof |
| CN101651017A (en) * | 2009-01-14 | 2010-02-17 | 郑州乾新电子有限公司 | Liquid-magnetism filled high-frequency transformer |
| US20120218069A1 (en) * | 2011-02-28 | 2012-08-30 | GM Global Technology Operations LLC | High frequency rotary transformer for synchronous electrical machines |
| CN102226958A (en) * | 2011-03-11 | 2011-10-26 | 深圳市五洲龙汽车有限公司 | Rotary transformer fixed structure and hybrid electric vehicle |
| CN202405060U (en) * | 2011-12-24 | 2012-08-29 | 车晋绥 | Magnetic liquid transformer |
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Address after: 518057 Shenzhen Nanshan District, Guangdong Province Patentee after: Biologic medical Science and Technology Co., Ltd. is opened in Shenzhen Address before: 518051 Yizhe Building, Yuquan Road, Nanshan District, Shenzhen City, Guangdong Province, 4th, 5th, 8th, 9th and 10th Floors Patentee before: Biologic medical Science and Technology Co., Ltd. is opened in Shenzhen |