CN104533990A - Reluctance type electromagnetic coil reducer and speed reducing method thereof - Google Patents
Reluctance type electromagnetic coil reducer and speed reducing method thereof Download PDFInfo
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- CN104533990A CN104533990A CN201410820023.7A CN201410820023A CN104533990A CN 104533990 A CN104533990 A CN 104533990A CN 201410820023 A CN201410820023 A CN 201410820023A CN 104533990 A CN104533990 A CN 104533990A
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- coil
- armature
- retarder
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Abstract
The invention relates to a reluctance type electromagnetic coil reducer and a speed reducing method thereof. An inverse process of a common acceleration technique in electromagnetic emission is utilized, an impulse capacitor is used as an excitation power source, electric discharging is conducted on a coil, an impulse electromagnetic field is formed; pulling is conducted on a ferromagnetic material object with speed, therefore, the speed of the object is reduced until the object stops, and a braking action on the ferromagnetic object is achieved. According to the reluctance type electromagnetic coil reducer and the speed reducing method thereof, the accelerative inverse process is artfully used so that the ferromagnetic object achieving a certain speed due to a working state can be quickly and simply braked, convenience and high-efficiency are achieved, and minimum price is used for braking the ferromagnetic object and for the next work.
Description
Technical field
The present invention relates to a kind of magnetoresistive type electromagnetic coil retarder and retarding method thereof, it is mainly used in the field needing braking motion ferromagnetic object, can realize the braking action to the ferromagnetic object obtaining certain speed.
Background technique
In theory, the emitter using electric energy to launch is by the restriction not by ectocine, and be only subject to the restriction of emitter and coil method, therefore Electromagnetic Launching is a kind of desirable radiation pattern.So-called ELECTROMAGNETIC LAUNCH TECHNOLOGY is kinetic energy electromagnetic energy, by electromagnetic force acting, is actually a kind of special electric actuator.ELECTROMAGNETIC LAUNCH TECHNOLOGY is the application technology of Theory of Electromagnetic Field, the advantage that this technology has that launching speed is high, the energy is simple and easy, efficiency is high, function admirable, controllability are good and the general transmit technology such as various structures is incomparable, it is made to have great meaning and application potential in future military, the association area such as civilian, be the study hotspot of international academic community rise in recent years, it provides new approaches for replacing traditional chemical motility technology.
According to Electromagnetic Launching principle, coil EML device can be divided into magnetic resistance type and induction type, and the acceleration principle of the two is different.Wherein, reluctance coil formula electromagnetic launcher utilizes the magnetic resistance change rate of the ferromagnetic magnetic circuit of coil to attract iron core motion to accelerate iron core emitter, and line of induction ring type electromagnetic launcher mainly utilizes the larger acceleration thrust of the generation of inductive loop when launching body to accelerate.Difference is: one be the emitter of reluctance coil formula electromagnetic launcher is a monoblock ferromagnetic material, and accelerated is not emitter coil or tubulose emitter; Two is introduce ferromagnetic material in reluctance coil formula electromagnetic launcher system, and efficiency is higher than air core coil electromagnetic launcher.
The present invention adopts the inverse process of Electromagnetic Launching, namely utilizes electromagnetic force to make to reach emitter at a high speed and slows down, select the braking action of magnetoresistive type coil damper realization to the emitter of the permeability magnetic material types such as such as iron.
As shown in Figure 2, when coil passes to electric current, emitter is magnetized, and to the direction motion that magnetic resistance reduces under magnetic force effect.When emitter is in the minimum position of magnetic resistance in magnetic circuit, emitter will keep motionless.When emitter advances to hub of a spool, the magnetic resistance of magnetic circuit is also little, now also minimum to the active force of emitter.Magnetic resistance type emitter is only by pulling force, and not by the feature of thrust, the feature making it be different from that induction type emitter can to draw emitter when suitably selecting two kinds of the direction of the winding current, can push away, the power supply effect also therefore in the present invention should at emitter after damper winding mid point.
Summary of the invention
Target of the present invention is that the ferromagnetic object to obtaining certain speed is braked, by arranging one or several coil winding and by power apparatus loops in series such as itself and capacitors, by controlling the excitation triggered time, the ferromagnetic object obtaining certain speed is slowed down, and finally realizes braking.
Specifically, for the object with good permeance, after worked, there is certain kinetic energy, slow down rapidly for making it, it is inverse that more satisfactory way is exactly principle Electromagnetic Launching accelerated, namely one-level or some grades of coil-power loops are set, by suitable time turning circuit, make the electric current by a certain size in coil.At this moment, ferromagnetic object is magnetized, and under the action of a magnetic force to the direction motion that magnetic resistance reduces.And for situation about the present invention relates to, this suitable time is after ferromagnetic object mid point moves through the mid point of coil, because for magnetoresistive type coil, it only has " further power " of attraction to the power of emitter, if therefore before mid point i.e. turning circuit, emitter accelerated motion by " attractions " can be caused on the contrary, after emitter passes through coil mid point, " attraction " of coil to it causes emitter to be subject to the power contrary with moving direction, thus braking deceleration.
Magnetoresistive type coil retarder is made up of retarder coil, capacitor power, diode and protective resistance, and the parameter of each several part comprehensively should be determined according to the test of the scale of accelerated test, line correlation of being gone forward side by side by certain calculating.Especially the voltage swing of capacitor and choosing of Capacity is the design focal point of whole coil damper.
Above-mentioned technical problem of the present invention is mainly solved by following technical proposals:
A kind of magnetoresistive type coil retarder, is characterized in that, structure comprises at least one-level reduction assemblies, described reduction assemblies connect successively at least one damping coil, power supply, diode composition circuit loop, an electric capacity that diode is also connected.
At above-mentioned a kind of magnetoresistive type coil retarder, described reduction assemblies is some levels, be arranged in parallel successively.
A kind of retarding method adopting magnetoresistive type coil retarder, it is characterized in that, according to the braking principle of magnetoresistive type, discharge when the mid point of ferromagnetic object has just moved across the coil retarder mid point moment, thus coil is braked because being subject to the attraction force contrary with moving direction, further, after the inverse parallel of diode ensures that switch is closed, no longer reverse secondary discharge after couple capacitors coil once discharges; Concrete grammar is:
According to until deceleration object speed and institute adopt electric capacity-coil to match deceleration circuit determination drive coil light a fire time armature relative position, method is as follows:
Definition drive coil inductance value is
l, condenser capacity is
c, initial voltage is U, then the initial energy storage of capacitor is
By the circuit loop principle of magnetoresistive type coil retarder, the rise time of loop current can be determined:
The speed defining armature to be slowed down is
v 0, definition correlation coefficient k, during drive coil igniting, the distance between armature mid point and drive coil mid point is
d.
D=
k×
v 0×
t rise
Wherein:
After armature mid point and coil mid point overlap during coil igniting, 0≤
k≤ 0.2, armature continued deceleration, slowing effect along with
kvalue increases and reduces, 0≤
kwhen≤0.05, slowing effect is best;
Before armature mid point and coil mid point overlap during coil igniting, 0≤
k≤ 0.2, concussion is slowed down by armature, is namely first accelerated by electromagnetic coil, being decelerated to armature velocity reversal subsequently, being retracted the other way around by armature, oppositely accelerate, by being decelerated after coil, then being pulled former moving direction again, until stop.As long as the energy that deceleration coil is deposited
eenough large, then ferromagnetic coil can be made completely to slow down.Along with retarder energy is larger,
kvalue also can increase.According to until deceleration object speed and institute adopt electric capacity-coil to match deceleration circuit determination drive coil light a fire time armature relative position.
At above-mentioned a kind of retarding method adopting magnetoresistive type coil retarder, can multi-stage speed-reducing be adopted, realize the braking completely of ferromagnetic object.
At above-mentioned a kind of retarding method adopting magnetoresistive type coil retarder, treat that deceleration object is that permeability magnetic material is made.
Tool of the present invention has the following advantages: the inverse process utilizing acceleration cleverly, makes to be braked rapidly, simply because working state obtains the ferromagnetic object of certain speed, convenient efficient again, by minimum cost, by ferromagnetic object braking and in order to the work of next time.
Accompanying drawing explanation
Fig. 1 is the circuit model figure of magnetoresistive type electromagnetic coil retarder.
Fig. 2 is single-stage reluctance coil electromagnetic launcher schematic diagram.
Fig. 3 is the process schematic of ferromagnetic object by coil retarder.
Fig. 4 is induction type retarder schematic diagram in the embodiment of the present invention.
Fig. 5 is embodiment of the present invention China and foreign countries circuit diagrams.
Fig. 6 is the drive coil current waveform in the embodiment of the present invention under different ignition location.
Fig. 7 is the stress curve that in the embodiment of the present invention, the different initial position of armature is corresponding.
Fig. 8 is the velocity curve that in the embodiment of the present invention, the different initial position of armature is corresponding.
Fig. 9 is the displacement diagram that in the embodiment of the present invention, the different initial position of armature is corresponding.
Embodiment
Below in conjunction with Figure of description, the present invention will be further described:
As shown in Figure 1, be the circuit model figure of magnetoresistive type electromagnetic coil retarder.Coil is wherein retarder coil, and capacitor initially has certain electric energy.In due course, turn-on power, is made electric capacity be discharged by adjustable protective resistance to coil, thus produce induction field around damper winding.
Fig. 2, for single-stage reluctance coil electromagnetic launcher, can illustrate principle of the present invention by composition graphs, simultaneously the present invention is also the inverse process accelerated ferromagnetic object based on it, realizes braking function.As indicated in figure, 1 is drive coil, and 2 is permeability magnetic material object.When coil passes to electric current, emitter is magnetized, and to the direction motion that magnetic resistance reduces under magnetic force effect.When emitter is in the minimum position of magnetic resistance in magnetic circuit, emitter will keep motionless.As long as have electric current in coil, no matter whether this electric current changes or how to change, and does not affect acceleration form.From this angle, it is simpler than induction type accelerated mode, and also determining high permeability material object can only be pulled simultaneously, and can not be pushed into, and its action effect only depends on the position of ferromagnetic object relative to drive coil.When ferromagnetic object advances to hub of a spool, the magnetic resistance of magnetic circuit is minimum, now also minimum to the active force of emitter, and magnetic flux is easier to be formed and pass through; When emitter is removed from hub of a spool, originally emitter magnetic force forward becomes now and draws emitter backward, therefore at emitter by after damper winding mid point, by loop, conducting damper winding place, coil is made to produce one toward the power of pulling back to emitter, emitter is slowed down, and method is as follows:
Definition drive coil inductance value is
l, condenser capacity is
c, initial voltage is U, then the initial energy storage of capacitor is
By the circuit loop principle of magnetoresistive type coil retarder, the rise time of loop current can be determined:
The speed defining armature to be slowed down is
v 0, definition correlation coefficient k, during drive coil igniting, the distance between armature mid point and drive coil mid point is
d.
D=
k×
v 0×
t rise
Wherein:
After armature mid point and coil mid point overlap during coil igniting, 0≤
k≤ 0.2, armature continued deceleration, slowing effect along with
kvalue increases and reduces, 0≤
kwhen≤0.05, slowing effect is best;
Before armature mid point and coil mid point overlap during coil igniting, 0≤
k≤ 0.2, concussion is slowed down by armature, is namely first accelerated by electromagnetic coil, being decelerated to armature velocity reversal subsequently, being retracted the other way around by armature, oppositely accelerate, by being decelerated after coil, then being pulled former moving direction again, until stop.As long as the energy that deceleration coil is deposited
eenough large, then ferromagnetic coil can be made completely to slow down.Along with retarder energy is larger,
kvalue also can increase.According to until deceleration object speed and institute adopt electric capacity-coil to match deceleration circuit determination drive coil light a fire time armature relative position.
Figure 3 shows that ferromagnetic object to slow down and at the point midway of the 3rd retarder coil through the first two retarder coil, power supply starts electric discharge to coil, by the magnetization to emitter, make emitter by " attraction ", be subject to and moving direction opposite effect power, thus realize braking and slowing down.It is worthy of note, such coil retarder can have multiple acting in conjunction in same ferromagnetic object, makes slowing effect better.
Here is the concrete embodiment adopting said method:
Set up simulation model as shown in Figure 1.Design parameter is described below:
Aluminum barrel armature: inside radius 0.1m, outer radius 0.2m, length is 0.4m, and quality is 2kg, moves upward along Sports band with the speed of 100m/s.
Copper drive coil: inside radius 0.3m, outer radius 0.5m, length is 0.4m, and the number of turn is 60 circles.
Impulse capacitor: to coil power supply, Capacity is 8mF, and initial voltage is 4000V.
Drive external circuit as shown in Figure 2.
In order to comparator coil light a fire time, armature and Coil spacing, on the impact of armature decelerability, compare the asynchronous slowing effect of armature initial position.
During armature initial position armz=0.2m, with drive coil distance D=0.3m;
During armature initial position armz=0.3m, with drive coil distance D=0.2m;
During armature initial position armz=0.4m, with drive coil distance D=0.1m;
During armature initial position armz=0.5m, with drive coil distance D=0.0m;
During armature initial position armz=0.6m, with drive coil distance D=-0.1m;
Stress curve under the different initial position of armature, velocity curve, displacement diagram are respectively as shown in Fig. 4, Fig. 5, Fig. 6.
As shown in Figure 6, rise-time of current trise is about 7ms, armature initial velocity v0=100m/s, then for making armature slow down, the ignition location size according to formula gained should be D=0.7k, i.e. 0.42m ~ 0.98m.
From Fig. 7,8,9, when armature initial position is 0 ~ 0.8m in example, corresponding to when being 0.3 ~ 1.1m at a distance of coil distance, within the scope of this, armature all can being made to slow down smoothly, even rebound.Deceleration demand can be met according to the ignition schemes that formulae discovery obtains.
The present invention is on the architecture basics of existing electromagnetic coil transmitter, for the situation that emitter is good permeability magnetic material, devise a magnetoresistive type electromagnetic coil retarder, can facilitate, make work complete efficiently and have certain speed electromagnetic object braking, and its structure is simple, easy for installation, for relevant scientific experimentation and practical application, there is important use value.
Specific embodiment described herein is only to the explanation for example of the present invention's spirit.Those skilled in the art can make various amendment or supplement or adopt similar mode to substitute to described specific embodiment, but can't depart from spirit of the present invention or surmount the scope that appended claims defines.
Claims (5)
1. a magnetoresistive type coil retarder, is characterized in that, structure comprises at least one-level reduction assemblies, described reduction assemblies connect successively at least one damping coil, power supply, diode composition circuit loop, an electric capacity that diode is also connected.
2. a kind of magnetoresistive type coil retarder according to claim 1, it is characterized in that, described reduction assemblies is some levels, be arranged in parallel successively.
3. one kind adopts the retarding method of magnetoresistive type coil retarder according to claim 1, it is characterized in that, according to the braking principle of magnetoresistive type, discharge when the mid point of ferromagnetic object has just moved across the coil retarder mid point moment, thus coil is braked because being subject to the attraction force contrary with moving direction, further, after the inverse parallel of diode ensures that switch is closed, no longer reverse secondary discharge after couple capacitors coil once discharges; Concrete grammar is:
According to until deceleration object speed and institute adopt electric capacity-coil to match deceleration circuit determination drive coil light a fire time armature relative position, method is as follows:
Definition drive coil inductance value is
l, condenser capacity is
c, initial voltage is U, then the initial energy storage of capacitor is
By the circuit loop principle of magnetoresistive type coil retarder, the rise time of loop current can be determined:
The speed defining armature to be slowed down is
v 0, definition correlation coefficient k, during drive coil igniting, the distance between armature mid point and drive coil mid point is
d;
D=
k×
v 0×
t rise
Wherein:
After armature mid point and coil mid point overlap during coil igniting, 0≤
k≤ 0.2, armature continued deceleration, slowing effect along with
kvalue increases and reduces, 0≤
kwhen≤0.05, slowing effect is best;
Before armature mid point and coil mid point overlap during coil igniting, 0≤
k≤ 0.2, concussion is slowed down by armature, is namely first accelerated by electromagnetic coil, being decelerated to armature velocity reversal subsequently, being retracted the other way around by armature, oppositely accelerate, by being decelerated after coil, then being pulled former moving direction again, until stop; As long as the energy that deceleration coil is deposited
eenough large, then ferromagnetic coil can be made completely to slow down; Along with retarder energy is larger,
kvalue also can increase; According to until deceleration object speed and institute adopt electric capacity-coil to match deceleration circuit determination drive coil light a fire time armature relative position.
4. a kind of retarding method adopting magnetoresistive type coil retarder according to claim 3, is characterized in that, can adopt multi-stage speed-reducing, realizes the braking completely of ferromagnetic object.
5. a kind of retarding method adopting magnetoresistive type coil retarder according to claim 3, is characterized in that, treats that deceleration object is that permeability magnetic material is made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410820023.7A CN104533990A (en) | 2014-12-25 | 2014-12-25 | Reluctance type electromagnetic coil reducer and speed reducing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410820023.7A CN104533990A (en) | 2014-12-25 | 2014-12-25 | Reluctance type electromagnetic coil reducer and speed reducing method thereof |
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| CN104533990A true CN104533990A (en) | 2015-04-22 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108759558A (en) * | 2018-04-09 | 2018-11-06 | 广州大学 | A kind of miniature reluctance type coilgun bullet firing rate control method based on switching sequence |
| CN110838782A (en) * | 2019-11-25 | 2020-02-25 | 武汉纺织大学 | Sectional combination relay type magnetic drive speed reducer and speed reduction method thereof |
| WO2021031799A1 (en) * | 2019-08-19 | 2021-02-25 | 北京航空航天大学 | High-load and low-loss inertial superconducting magnetic suspension micro-force measurement device |
| CN112857734A (en) * | 2021-04-02 | 2021-05-28 | 南京工业职业技术大学 | Electromagnetic traction type aircraft mooring experiment table and experiment method thereof |
| CN113241267A (en) * | 2021-03-29 | 2021-08-10 | 平高集团有限公司 | Quick opening/closing electromagnetic repulsion mechanism and quick opening/closing switch |
-
2014
- 2014-12-25 CN CN201410820023.7A patent/CN104533990A/en active Pending
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108759558A (en) * | 2018-04-09 | 2018-11-06 | 广州大学 | A kind of miniature reluctance type coilgun bullet firing rate control method based on switching sequence |
| WO2021031799A1 (en) * | 2019-08-19 | 2021-02-25 | 北京航空航天大学 | High-load and low-loss inertial superconducting magnetic suspension micro-force measurement device |
| CN110838782A (en) * | 2019-11-25 | 2020-02-25 | 武汉纺织大学 | Sectional combination relay type magnetic drive speed reducer and speed reduction method thereof |
| CN110838782B (en) * | 2019-11-25 | 2021-05-11 | 武汉纺织大学 | Sectional combination relay type magnetic drive speed reducer and speed reduction method thereof |
| CN113241267A (en) * | 2021-03-29 | 2021-08-10 | 平高集团有限公司 | Quick opening/closing electromagnetic repulsion mechanism and quick opening/closing switch |
| CN113241267B (en) * | 2021-03-29 | 2023-02-17 | 平高集团有限公司 | Quick opening/closing electromagnetic repulsion mechanism and quick opening/closing switch |
| CN112857734A (en) * | 2021-04-02 | 2021-05-28 | 南京工业职业技术大学 | Electromagnetic traction type aircraft mooring experiment table and experiment method thereof |
| CN112857734B (en) * | 2021-04-02 | 2023-03-14 | 南京工业职业技术大学 | Electromagnetic traction type aircraft mooring experiment table and experiment method thereof |
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Application publication date: 20150422 |