CN2298615Y - Pole shoe close jointed oscillating motor - Google Patents
Pole shoe close jointed oscillating motor Download PDFInfo
- Publication number
- CN2298615Y CN2298615Y CN 97203426 CN97203426U CN2298615Y CN 2298615 Y CN2298615 Y CN 2298615Y CN 97203426 CN97203426 CN 97203426 CN 97203426 U CN97203426 U CN 97203426U CN 2298615 Y CN2298615 Y CN 2298615Y
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- rotor
- pole shoe
- stator
- motor
- magnetic
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Abstract
The utility model provides a novel limited outer corner oscillating motor. The utility model changes the traditional structure, a stator and a pole shoe which are separated with definite spacing are tightly jointed, and limited magnetic resistance is formed at a joint part. The structure causes the deflection force moment between the rotor and a pole shoe pair to approach to zero, and the rotor can stay at any position with no limitation. Hence, the oscillating motor can be provided with no oscillating center, and an elastic element or an electromagnetic element generating recovery force moment is relieved. Simultaneously, the oscillating motor needs to work under the condition of a closed-loop control circuit; because no large constant electric current needs maintaining in winding for balancing the recovery force moment, the power consumption of the motor is reduced.
Description
The utility model relates to finite angle swing motor, relates in particular to the finite angle swing motor that pole shoe is right after the new structure that closes.
The swing motor of present traditional design, two pole shoes of its stator all are designed to certain distance interval that has separately, and rotor is swung between these two pole shoes that separate.Be set at oscillation center in bipolar shoe center at interval, this oscillation center is as the initial position of rotor.For being positioned at oscillation center, just must there be restoring torque with making rotor stability.This moment can be the torsional moment that produces of the flexible member of machinery or the magnetic torque of electro permanent magnetic.Injection current in motor magnetic circuit internal stator winding, the driving magnetic flux that produces in pole shoe just and preset the magnetic flux stack change magnetic flux distribution.Rotor is subjected to the effect of magnetic torque to turn to the big direction of magnetic flux density, and promptly the off-center position reaches balance up to the magnetic torque of this biasing and the twist recovery moment of flexible member.The direction of rotor biasing and size are corresponding to sense of current and the size of injecting winding.Usually, the swing of rotor is original position with the oscillation center, and the amplitude of oscillation is limited in the scope of two pole shoes.If it is constant injecting the current strength of winding, rotor then biases on the corresponding position, a certain angle.If inject suitable alternating signal, rotor is reciprocally swinging in a certain angular range just.
To more typically swinging motor (Fig. 1 a and 1b) in the prior art, the magnetic circuit principle of the motor that the torsional moment that promptly has elastic component is supported is done one and is briefly described below.
Among Fig. 1 a, a pair of stator b and b ', each stator have a pair of separately pole shoe jk and j ' k ' and the stator winding d and the d ' of a determining deviation; A pair of permanent magnet a and a ' are housed between two stators in parallel, and therefore, pole shoe j and k are same polarities, and polarity j ' and k ' also are same polarities, but opposite with jk polarity.Rotor c rotates in the concentric turns that pole shoe constitutes, and the arc surface of pole shoe and the arc surface of rotor have the very little air gap of spacing, and its oscillation center is on the centre position of pole shoe jk and j ' k ', and the (not shown) that has elastic component is supported in oscillation center with rotor.
As can be seen from Figure 1, the magnetic flux of permanent magnet a and a ' is for presetting magnetic flux, and the air gap through rotor c two ends forms the loop in parallel.The magnetic flux that presets that is a is from the N utmost point, pole shoe j and air gap through stator b enter rotor c, pole shoe j ' through air gap and stator b ' gets back to the S utmost point again, and the magnetic flux that presets of a ' is from the N utmost point, pole shoe k and air gap through stator b enter rotor c, and the pole shoe k ' through air gap and stator b ' gets back to the S utmost point again.
Magnetic flux distribution changes in the air gap if injection current in parallel among winding d and the d ', the driving magnetic flux of generation just and preset the magnetic flux stack, make.Particularly, the magnetic flux at the air gap place between the magnetic flux at the air gap place between pole shoe j and the rotor c and pole shoe k ' and the rotor c strengthens, and the magnetic flux at the air gap place between the magnetic flux at the air gap place between pole shoe j and the rotor c and pole shoe k and the rotor c weakens.Rotor is subjected to the magnetic torque effect to turn to the big direction of magnetic flux density, promptly turns to the direction of j and k ' from the center of jk and j ' k '.
The support if having elastic component, balance each other up to the twist recovery moment with flexible member in rotor off-center position.If but the support rotor that does not have flexible member is easy to enter the situation shown in Fig. 1 b.From Fig. 1 b as can be seen, rotor deflection is to the extreme position of pole shoe at this moment, and the arc surface of rotor faces the arc surface of stator pole shoes, is the configuration of system capacity minimum.Under this extreme position situation, rotor is absorbed in dark magnetic potential energy valley, is in stability, so rotor just can not be done corresponding swing according to the current signal that injects in the winding, thereby can't operate as normal.As seen, for traditional wobble electrode at regular intervals between the pole shoe, the torsional moment that flexible member provided is absolutely necessary.
In addition, flexible member provides restoring torque to also have an intrinsic feature.This class swing motor belongs to the second order vibrational system of mechanics, and its self-resonant frequency is
Wherein J is the moment of inertia of rotor and load thereof, and k is the elasticity of torsion constant of flexible member.When the frequency of injecting signal in the winding and self-resonant frequency f ten minutes near the time, the amplitude of oscillation of rotor will be very big, understands pole shoe limit range head and shoulders above, just must cause the damage of flexible member.For eliminating this phenomenon, this swing motor closed control circuit of being everlasting is promptly worked with under the condition of angular position pick up.
The swing motor that separates between stator pole shoes also has a more obvious shortcoming, exactly for the rotor long period of motor is remained on a certain bigger position, angle, just must in winding, keep corresponding bigger constant current, come and the restoring torque balance to produce the deflection magnetic torque, must have higher temperature rise and bigger power consumption in the winding this moment.
The utility model has changed the traditional structure of prior art to the swing design of electrical motor, will separate stator pole shoes at regular intervals and be right after altogether.In this structural design, a pair of permanent magnet is placed between two stators in parallel, and being right after a pair of bipolar shoe that closes has identical polar, and another has another identical polarity to being right after the bipolar shoe that closes.Therefore, permanent magnet produces presets magnetic flux, through air gap between an end pole shoe and rotor, by rotor, returns permanent magnet through other end air gap again.To produce and to preset magnetic flux be the pole shoe of urgent joint flows to another pole shoe by rotor c to j and k j ' and k ' to permanent magnet in such structure.Rotor is in the right interval of pole shoe, field of magnetic forece between stator and rotor in the air gap is to distribute along arc surface between stator and rotor symmetrically, and be basically perpendicular to arc surface, it radially by the axle center of rotor, therefore can think the moment of rotor deflection is close to zero with joint efforts approx.Do not have the situation of stable state that rotor is strapped in the low magnetic potential energy valley of pole shoe for this structural design yet, pole shoe to fixing interval in, rotor can rest on the optional position.Therefore, the swing motor of this structure can not be provided with oscillation center, has exempted the flexible member or the electromagnetic component that produce necessary restoring torque; Simultaneously owing to needn't in winding, keep the power consumption that bigger constant current (with the balance restoring torque) also greatly reduces motor.
For this reason, the utility model provides a kind of finite angle swing motor, comprising:
The a pair of stator of making by the Alperm material;
In a pair of stator, respectively be provided with a control coil winding;
Between a pair of stator, be installed in parallel a pair of permanent magnet;
At the pole shoe of stator one rotor of being made by the Alperm material is set rotationally internally;
At the two ends of rotor the bearing support is arranged, the upper end shaft extension connects load and the lower end shaft extension is equipped with angular position pick up, and this position transducer is worked motor in closed control circuit;
The mutual tight fit of pole shoe that it is characterized in that this motor stator makes its junction surface form a limited magnetic resistance.
Wherein, stator pole shoes is right after that to close be by only there being several microns to tens microns gap to realize between bipolar shoe; Also can embed the high permeability material of appropriate size and shape between bipolar shoe, two or more gaps realize to be provided with.
The utility model also comprises the another kind of variant of the novel swing motor with above-mentioned feature, i.e. the position mutual alternative of the position of permanent magnet and stator winding wherein.This variant can be realized purpose of the present invention equally.
Brief description of drawings
Fig. 1 a is that prior art is used the horizontal section schematic diagram of flexible member with the swing electric machine structure of generation torsional moment.
Fig. 1 b is the magnetic circuit distribution schematic diagram that the rotor of motor shown in Fig. 1 a is absorbed in dark magnetic potential energy valley.
Fig. 2 a is a swing electric machine structure longitudinal profile schematic diagram of the present utility model.
Fig. 2 b is the horizontal section schematic diagram of Fig. 2 a.
Fig. 2 c is the magnetic return path schematic diagram that rotor shown in Fig. 2 b is biased to the pole shoe extreme position.
Fig. 3 a is the structural representation of the location swap of mutation-permanent magnet of motor shown in Figure 2 and winding.
Fig. 3 b is the flux circuit schematic diagram that rotor shown in Fig. 3 b deflects into the pole shoe extreme position.
Fig. 2-3 below in conjunction with accompanying drawing describes the utility model in detail.
With reference to Fig. 2 a, rotor c is made by high magnetic conductive soft iron material, and there are bearing e and e ' support in two ends, h is that the shaft extension end of rotor is in order to connect load, stator b and b ' are made up of the high permeability material lamination, and drive coil winding d and d ' are arranged on it, and the lower end of rotor c is with angular position pick up.
Referring to Fig. 2 b, the pole shoe j of stator b and k are right after and close, and the pole shoe j ' of stator b ' and k ' are right after equally and close, and its gap o and o ' are several microns-tens microns; (also can be by between pole shoe, embedding the high magnetic conductive soft iron material of appropriate size and shape, be right after and close gap O-O to form two places
1And O '-O
1').Permanent magnet a and a ' are installed between two stators in parallel, and magnetic flux is from the permanent magnet N utmost point, in the same way in parallel through the stator pole shoes of an end and the air gap between rotor again by rotor, and then constitute the loop through the S utmost point that the air gap of the other end turns back to permanent magnet.J has identical polarity with k in the pole shoe, and pole shoe j ' is another identical polarity with k ', and the magnetic line of force in the air gap is basically perpendicular to the circular arc end face of rotor.
From last magnetic circuit analysis as can be known, when the swing machine operation, exist the stack in magnetic field, two aspects on the two ends pole shoe of stator.The first is that the magnetic flux that presets of the permanent magnet of parallel connection passes through pole shoe to rotor, makes the pole shoe of stator b to j and k identical polar be arranged, and makes the pole shoe of another stator b ' to j ' and k ' mutually the same but opposite with j and k magnetic polarity be arranged.It two is that the winding of two stators injects the driving magnetic flux that drive current in the same way produces, make two ends j and the different magnetic polarity of k generation at the magnetic resistance of the pole shoe gap of stator b o, generation is different magnetic polarities equally with k ' at the magnetic resistance two ends j ' of the pole shoe gap of stator b ' o ', but because drive current injects in the same way, so pole shoe j has identical magnetic polarity with pole shoe j ', and pole shoe k has another identical magnetic with k '.This shows, preset magnetic flux and drive the result that magnetic flux superposes in magnetic circuit, be magnetic field on a pair of pole shoe (as i-k ') that makes on a certain diagonal owing to the identical stack of polarity strengthens, and make a pair of pole shoe on another diagonal (as the magnetic field on the j '-k) owing to opposite polarity counteracting weakens.So just on a diagonal, form a pair of polarity phase pole shoe of magnetic field enhancing on the contrary, and form a pair of polarity phase pole shoe of field weakening on the contrary on another diagonal.Thereby the two ends of rotor are to the direction deflection of magnetic field enhancing.
Oscillating electrode of the present utility model must be worked under the condition of closed control circuit, and the rotor of promptly swinging motor is with angular position pick up, and it is exportable corresponding with it voltage E when rotor is in a certain angle position θ
T=K θ, K are the transducer sensitivity constants, and output voltage is that zero angle location definition is θ=0, and it is selected in the gap location at pole shoe junction surface.Injecting the mode that the electric current of winding can two kinds of input signals works.
If a) input signal E
iBe direct voltage, the drive current of amplifier A output makes rotor deflection, and position transducer promptly has correspondent voltage E
TOutput.Work as E
T≠ E
i, E
i-E
T=Δ E ≠ 0, amplifier A has the corresponding driving current i to continue the input stator winding, makes rotor continue deflection, up to E
T=E
i, E
i-E
TTill during=Δ E=0.Inject current i=0 of winding this moment, rotor by locking on corresponding certain position, angle, with the direct voltage E of θ angle and input
iCorresponding.Because in designed magnetic circuit, rotor has magnetic torque T=0 everywhere in the right interval of stator pole shoes, so rotor does not need to keep electric current i=0 in winding when resting on deflection angle theta.Just at E
iEffect under, when a certain θ angle that rotor keeps corresponding was static, the power loss of the winding of stator was zero.
B) if input signal E
iChange the output voltage E of (in the frequency range that can respond) angular position pick up
TTo follow E
i, but this moment E
T≠ E
i, Δ E ≠ 0, amplifier A has output current i to inject winding, makes rotor deflection, and the motion state of its deflection is just being followed the input signal E that changes
iBecause same reason, rotor only need overcome fricative resistance in yaw motion, and just the power consumption of motor windings is less therefore only to need less drive current.
With reference to figure 2c, this figure presentation graphs 2b rotor deflects into the extreme position of pole shoe, the flux circuit when promptly the both ends of the surface of rotor are coated by the end face of the pole shoe j of relative one group of stator and k ' fully.This moment permanent magnet driving magnetic flux because of through junction surface o and o ' magnetic resistance, the magnetic flux that enters rotor is weakened, thereby the obstruction of having avoided rotor c under the drive current effect, to rotate, promptly rotor can not be strapped in the dark magnetic potential energy valley shown in Fig. 1 b and cisco unity malfunction again.
Fig. 3 a is the mutation of Fig. 2 a, and promptly exchange has been done in the position of the position of permanent magnet and winding, but the swing motor of its operation principle and Fig. 2 a is basic identical.The magnetic flux that presets of permanent magnet passes through the junction surface gap o of pole shoe to j and k, makes the magnetic resistance two ends of magnetic gap o that different polarity be arranged, and another permanent magnet also produces same effect to the magnetic resistance o ' of pole shoe j ' and k '.Settle in the same way because of two permanent magnets, so j has the identical magnetic polarity that presets with j ', and k and k ' have another identical magnetic polarity that presets.When injecting in the same way drive current in two windings, the driving magnetic flux of generation makes pole shoe j and k that identical polarity be arranged and makes j ' and k ' that another identical polarity be arranged.Preset magnetic flux and the result who drives the magnetic flux mutual superposition, the magnetic flux density of opposite polarity pole shoe (as j-k ') on the diagonal is strengthened, (weaken as the magnetic flux density that should be j '-k) mutually and make on another diagonal.So rotor c is just to the diagonal deflection of j and k '.For this variant, similarly because pole shoe jj ' and kk ' are right after and close, and the limited magnetic resistance of its junction surface air gap o and o ' has been shunted a permanent magnet part and preset magnetic flux, thereby also weakened permanent magnet preset the control action of magnetic flux to rotor.Promptly have under the condition of work of angular position pick up closed circuit, no matter input signal is constant or alternation, owing to need in winding, not keep bigger electric current, thereby the power consumption of motor is minimum too.
Last with reference to figure 3b, the rotor deflection of this figure presentation graphs 3a is to the extreme position of pole shoe, and promptly rotor deflection extremely enters diagonal fully (as the interior situation of pole shoe of j '-k).At this moment, the magnetic flux that presets of two permanent magnets is entered pole shoe k and returns permanent magnet separately through air gap again by rotor c through air gap by pole shoe j '.Because the magnetic boots are right after and close, the limited magnetic resistance of its junction surface air gap o and o ' has been shunted and has partly been preset magnetic flux, the magnetic flux density of pole shoe and two ends of rotor face is fully weakened, thereby also avoided rotor c to be absorbed in the dark magnetic potential energy valley shown in Fig. 1 b and the situation of cisco unity malfunction.
Claims (4)
1. a finite angle is swung motor, comprising:
The a pair of stator of making by the Alperm material;
In a pair of stator, respectively be provided with a control coil winding;
Between a pair of stator, be installed in parallel a pair of permanent magnet;
A rotor of being made by the Alperm material is set in the pole shoe of stator rotationally;
At the two ends of rotor the bearing support is arranged, the upper end shaft extension connects load and the lower end shaft extension is equipped with angular position pick up, and this position transducer is worked motor in closed control circuit;
The pole shoe that it is characterized in that this motor stator is right after mutually and closes, and makes its junction surface form a limited magnetic resistance.
2. according to the swing motor of claim 1, wherein pole shoe is right after mutually that to close be by only there being one several microns to tens microns gap to realize between bipolar shoe.
3. according to the swing motor of claim 1, wherein the mutual tight fit of pole shoe is by embedding the high permeability material of appropriate size and shape between bipolar shoe, and two or more gaps realize to be provided with.
4. according to arbitrary swing motor among the claim 1-3, wherein the position mutual alternative of the position of permanent magnet and stator winding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97203426 CN2298615Y (en) | 1997-04-15 | 1997-04-15 | Pole shoe close jointed oscillating motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97203426 CN2298615Y (en) | 1997-04-15 | 1997-04-15 | Pole shoe close jointed oscillating motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2298615Y true CN2298615Y (en) | 1998-11-25 |
Family
ID=33924296
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97203426 Expired - Fee Related CN2298615Y (en) | 1997-04-15 | 1997-04-15 | Pole shoe close jointed oscillating motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2298615Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102077442B (en) * | 2008-05-12 | 2015-07-08 | 马格诺麦克斯有限公司 | Magnetic pole-piece support |
| CN107896045A (en) * | 2017-12-13 | 2018-04-10 | 浙江工业大学 | Magnetic pole tooth punching formula torque-motor |
| CN107910963A (en) * | 2017-12-13 | 2018-04-13 | 浙江工业大学 | Surface-mount type electromagnet |
| CN110492711A (en) * | 2019-08-12 | 2019-11-22 | 贵州航天林泉电机有限公司 | A kind of flat structure finite angle motor |
-
1997
- 1997-04-15 CN CN 97203426 patent/CN2298615Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102077442B (en) * | 2008-05-12 | 2015-07-08 | 马格诺麦克斯有限公司 | Magnetic pole-piece support |
| CN107896045A (en) * | 2017-12-13 | 2018-04-10 | 浙江工业大学 | Magnetic pole tooth punching formula torque-motor |
| CN107910963A (en) * | 2017-12-13 | 2018-04-13 | 浙江工业大学 | Surface-mount type electromagnet |
| CN110492711A (en) * | 2019-08-12 | 2019-11-22 | 贵州航天林泉电机有限公司 | A kind of flat structure finite angle motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |