CN101595626A - Magnetically driven reciprocating system and method - Google Patents
Magnetically driven reciprocating system and method Download PDFInfo
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- CN101595626A CN101595626A CNA2007800334956A CN200780033495A CN101595626A CN 101595626 A CN101595626 A CN 101595626A CN A2007800334956 A CNA2007800334956 A CN A2007800334956A CN 200780033495 A CN200780033495 A CN 200780033495A CN 101595626 A CN101595626 A CN 101595626A
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Abstract
The invention discloses a kind of magnetically driven reciprocating system and method, it comprises: at least one first electromagnet (18), have length direction with define axially, first end and second end and microscler unlatching core (21), it extends to second end from first end, and core (21) has symmetry axis roughly with axially coaxial; Control unit (24), first magnetic field that can provide first power to input to first electromagnet (18) and electromagnet (18) is changed in time, it is first utmost point of points in axial direction roughly; At least one fixed body (22) has second magnetic field, its roughly points in axial direction second utmost point and be configured to core (21) roughly coaxial at first end; At least one reciprocating type ferromagnet (20) is configured to core (21) roughly coaxially, and does not extend to fully outside the core at second end, can have second magnetic field responding first magnetic field, ferromagnet (20) but axial displacement to respond first and second magnetic field; And converter unit (26), mechanically receive reciprocating type ferromagnet (20) and the displacement of reciprocating type ferromagnet (20) can be changed into power output.Therefore the present invention can provide outputting power.
Description
Technical field
The present invention relates to a kind of magnetically driven reciprocating system and method, and relate to a kind of magnetically driven reciprocating system and method that power output is provided especially.
Background technology
Most rotary type electro-motors is to depend on electromagnetic principle to operate (though some motor is to operate by other Principle of Electric Engine, as electrostatic force and piezoelectric effect).The basic principle of electromagnetic motor is that charged line will produce mechanical force in magnetic field, and this power is all vertical with conductor and magnetic field as described in cold law (Lorentz force law), and rotation motor utilizes this effect exactly.
Linear motor is the electronic motor of a kind of polyphase ac basically, its stator (being the stationary part of motor) is the moment but produce a linear force along its length of therefore not rotating of spreading out, modal operator scheme is cold type actuator, wherein according to above-mentioned cold law, the increase of the linear ratio of the application of force and electric current and magnetic field.
Many previous electromagnetic motors as mentioned above because following factor, but may be not only following these, as structure, service speed and condition, moment, and material composition, and make its efficient limited, one few part is arranged in the said apparatus, if also have, is to operate by the reciprocating motion principle.
But the magnetic repeat system that therefore needs a kind of certainty ratio, it can high efficiency manipulation and/or can produce power.
Summary of the invention
The objective of the invention is the defective at above-mentioned prior art, a kind of magnetic reciprocating system and method are provided, it can provide outputting power.
The technical scheme taked of the present invention is to achieve these goals:
A kind of magnetically driven reciprocating system of the present invention, comprise: at least one first electromagnet, it is axial to define one to have a length direction, have one first end and one second end, and has a microscler unlatching core, it extends to second end from first end, and core has a symmetry axis, and it is roughly with axially coaxial; One control unit can provide one first power to input to first electromagnet and can make electromagnet have first magnetic field that changes in time, and it has roughly first utmost point of points in axial direction; At least one fixed body has one second magnetic field, its have one roughly points in axial direction second utmost point and be configured to core roughly coaxial at first end; At least one reciprocating type ferromagnet is configured to core roughly coaxially, and does not extend to fully outside the core at second end, can have one second magnetic field responding first magnetic field, but ferromagnet axial displacement is to respond first and second magnetic field; And a converter unit, mechanically receive reciprocating type ferromagnet and reciprocating type ferromagnetic displacement can be changed into power output.
Large-crowd selects ground, and power output is not less than the input of first power.
Large-crowd choosing ground, converter unit comprises a mechanical energy Buffer Unit again, it can the non-output of stores power side by side and sends the input of one second power back to.Usually, but converter unit sense power output again, displacement, and reciprocating type ferromagnetic speed.More generally, control unit can be indicated according to data again, and these data are that converter unit senses reciprocating type ferromagnetic power output, displacement, and speed, and control in time a plurality of and electric pulse wave that change, so that the input of first power to be provided.Large-crowd choosing ground, control unit again the input of may command first power so that power output pole is big.
Large-crowd choosing ground, fixed body are permanent magnetisms roughly.Usually, fixed body is ferromagnetic and exists second magnetic field to respond first magnetic field.More generally, fixed body is adiaphorous electromagnet.
Large-crowd selects ground, and fixed body is effective electromagnet, reach second magnetic field and roughly maintain necessarily, or second magnetic field changes along with the variation in first magnetic field.Large-crowd choosing ground, first electromagnet and reciprocating type ferromagnet are fixed on a common casing, but and it is characterized in that casing axial displacement is to respond first and second magnetic field.
The present invention also provides the method for the reciprocating type generation of a kind of operation one magnetic system, may further comprise the steps: take at least one first electromagnet, it is axial to define one to have a length direction, have one first end and one second end, and has a microscler unlatching core, it extends to second end from first end, and core has a symmetry axis, and it is roughly with axially coaxial; Provide one first power to input to first electromagnet with a control unit, and can make electromagnet have first magnetic field that changes in time, it has roughly first utmost point of points in axial direction; Dispose at least one fixed body, it is roughly coaxial at first end and nucleus, and this fixed body has one second magnetic field, and it has second utmost point of points in axial direction roughly; Dispose at least one reciprocating type ferromagnet and make itself and core roughly coaxial, and do not extend to fully outside the core, have one second magnetic field responding first magnetic field, but ferromagnet axial displacement is to respond first and second magnetic field at second end; And mechanically connect a converter unit to reciprocating type ferromagnet, and converter unit changes into power output with reciprocating type ferromagnetic displacement.
Large-crowd choosing ground, the unit comprises a mechanical energy Buffer Unit again, it can the non-output of stores power side by side and sends the input of one second power back to.
Large-crowd selects ground, but converter unit sense power output again, displacement, and reciprocating type ferromagnetic speed.Usually, control unit is indicated according to data, and these data are that converter unit senses reciprocating type ferromagnetic power output, displacement, and speed, and control unit is the in time a plurality of and electric pulse wave that changes of may command, so that the input of first power to be provided.The most common, control unit makes power output pole big by the input of control first power.
Large-crowd selects ground, and fixed body is a permanent magnetism roughly.
Large-crowd choosing ground, fixed body is ferromagnetic and exists second magnetic field to respond first magnetic field.
The invention has the beneficial effects as follows: compared to existing technology, magnetic reciprocating system of the present invention and method can provide outputting power.
Description of drawings
Figure 1A and Figure 1B are the schematic diagrames according to the magnetically driven reciprocating system of the embodiment of the invention 1;
Fig. 2 A and Fig. 2 B are the schematic diagrames according to the magnetically driven reciprocating system of the embodiment of the invention 2;
Fig. 3 A and Fig. 3 B are the schematic diagrames according to the magnetically driven reciprocating system of the embodiment of the invention 3;
Fig. 4 A and Fig. 4 B are the schematic diagrames according to the magnetically driven reciprocating system of the embodiment of the invention 4;
Fig. 5 is power and the displacement in a series of experiments of graphical display;
Fig. 6 and 7 is respectively the schematic diagram of the oscilloscope output of additional experiments setting.
Embodiment
The invention will be further described below in conjunction with the drawings and specific embodiments, but not as a limitation of the invention.
The present invention includes a kind of magnetic reciprocating system and method that outputting power is provided.
Embodiment 1
Referring to Figure 1A and Figure 1B, they are the schematic diagrames according to the magnetically driven reciprocating power range system 10 of the embodiment of the invention, system 10 comprises that a casing 15, is arranged in the ring-type electromagnet 18 of casing 15, and a ferromagnet 20 that is arranged in unlatching core 21 spaces of electromagnet 18.The noun that in following specification and claims, uses " electromagnet " be meant any inductor, owing to the effect of electric current produces magnetic field and follow-up magnetic force, electromagnet 18 is the unlatching core electromagnet of any suitable construction normally, yet core electromagnet that also can solid, it can burrow or revise to allow ferromagnet 20 general arrangement in opening core 21.Open core 21 and have a symmetry axis (not shown) usually to define the axial of system, electromagnet 18 is fixed in the casing 15, and ferromagnet 20 can axially displacement in the core of opening, the magnetic pole of the magnetic pole of electromagnet 18 and ferromagnet 20 is axle alignment, shown in Figure 1A and Figure 1B and will further specify in following, additionally or alternatively, electromagnet 18 can be represented more than one electromagnet, it has structure similar to the above and general arrangement becomes axial (not shown), to allow ferromagnet 20 displacement in opening core.
One fixed body 22 and the configuration of unlatching core axial direction, near electromagnet 18, but in the casing outside and in core 21 outsides, in an embodiment of the present invention, alternatively or additionally, fixed body is: desirable ferromagnetism does not have remanent magnetism, when this expression disappeared when the driving magnetic field of electromagnet 18, it did not promptly have magnetic; Or have the permanent magnet of height remanent magnetism, and or electromagnet, it can attonity or action is arranged when electromagnet 18 worked.The magnetic pole of fixed body 22 is to axially align and when fixed body is adiaphorous electromagnet (in the electromagnet no current flow), fixed body 22 is not change, as not changing among the figure "+" reach "-" shown in the symbol.
If fixed body 22 is electromagnet, then the allomeric function of fixed body 22 and configuration are similar to electromagnet 18, and have only the core of fixed body 22 to show in the drawings.When fixed body 22 was effective electromagnet, its utmost point can change in time, and mode is similar to lower electromagnet 18 described.Alternatively or additionally, fixed body 22 is adiaphorous electromagnet, the core of fixed body in the case, its function is substantially similar to above-mentioned ferromagnet.
One control unit, 24 power controlling are input to electromagnet 18, and make magnetic pole change in time, the noun that in following specification and claims, uses " power input " reach " power exports " be meant electricity or machine power, usually with watt (W) expression, in an embodiment of the present invention, control unit is controlled by the pulse wave time of control pulse wave frequency (for example power pulse number of per second) and power pulse wave (for example measuring with millisecond (ms)), and is controlled to the power pulse wave of electromagnet.At an embodiment, control unit 24 provides in time and the power pulse wave that changes, understands as prior art, as the pulse wave modulating method etc., alternately changing the pole orientation of electromagnet, as among Figure 1A and the 1B alternately shown in "+" and "-" symbol.Alternatively or additionally, control unit 24 provides in time and the power pulse wave that changes, understands as prior art, as pulse wave modulating method etc., alternately to make the electromagnet action and it is failure to actuate, produce and end a magnetic pole at a direction (not shown) by this.As above and the following stated, the magnetic pole of the magnetic pole of ferromagnet 20 and electromagnet 18 works.
In an example, wherein fixed body 22 is effective electromagnet, and as previously discussed, control unit 24 may command power again is input to fixed body to strengthen the reciprocal of ferromagnet 20, as described below.
In Figure 1A, can find out, when the magnetic pole of ferromagnet and fixed body is opposite, the displacement that ferromagnet 20 and fixed body 22 can be attracted each other and be moved one section S towards fixed body 22.Can find out at Figure 1B, when the magnetic pole of ferromagnet 20 and fixed body 22 is identical, the displacement that ferromagnet 20 can be ostracised and be moved one section S towards the direction away from fixed body 22.As previously discussed, control unit 24 control and change the power input (and if be suitable for the power input that also can change fixed body 22) of electromagnet 18 is so that ferromagnet 20 axially reciprocally moves the displacement of one section S and the displacement of moving one section S towards the direction away from fixed body 22 towards fixed body 22.In system, the changeization of magnetic pole, can strengthen and/or help ferromagnetic moving back and forth by mechanical energy.
In embodiments of the present invention, desirable electromagnet 18 does not have magnetic hysteresis, and this expression electromagnet when imposing energy can produce magnetic field simultaneously, and the magnetic field of electromagnet can disappear immediately when energy disappears.Similarly, desirable ferromagnet 20 does not have remanent magnetism, and when this expression disappeared when the driving magnetic field of electromagnet 18, ferromagnet 20 did not promptly have magnetic.In an embodiment of the present invention, ferromagnet 20 is by iron, yet other material can be obtained magnetic field so long as have mechanical stability, and low magnetic hysteresis, all is suitable for as previously discussed.
Can above following query site about can be used as typical electrical magnet that electromagnet 18 uses:
Http:// www.mannel-magnet.info/en_round.php of Mannel Magnet Ttechnik GbR, Tente 3,42859 Remscheid, Germany (Germany), its content is at this as a reference.
Execution experiment as described below comprises the input and the output of merit with the various operative position standard of decision and displaying magnetically driven reciprocating system 10.
Referring to Fig. 2 A and Fig. 2 B, they are that it is similar to the system shown in Figure 1A and Figure 1B according to the schematic diagram of the magnetically driven reciprocating power range system 110 of the embodiment of the invention.Except the different places of the following stated, the operation of magnetically driven reciprocating system 110 roughly is similar to the magnetically driven reciprocating system 10 of Figure 1A and Figure 1B, thus the assembly of representing with same numbers, its configuration and operation and above-mentioned be roughly the same.In system 110, electromagnet and ferromagnet are to be fixed in the casing 15, the displacement that casing then reciprocally moves the displacement of one section S and moves one section S towards the direction away from fixed body 22 towards fixed body 22,26 of converter units are received casing, its function and above-mentioned similar.
Embodiment 3
Referring to Fig. 3 A and Fig. 3 B, they are that it is similar to the system shown in Figure 1A and Figure 1B according to the schematic diagram of the magnetically driven reciprocating power range system 120 of the embodiment of the invention.Except the different places of the following stated, the operation of magnetically driven reciprocating system 120 roughly is similar to the magnetically driven reciprocating system 10 of Figure 1A and Figure 1B, thus the assembly of representing with same numbers, its configuration and operation and above-mentioned be roughly the same.In system 120, second fixed body 27 disposes coaxially with opening core, and near electromagnet 18 but in the casing outside and in core 21 outsides, and relative with fixed body 22.
In embodiments of the present invention, fixed body 22 and 27 alternatively or additionally is: be not have remanent magnetism under ideal state, when this expression disappears when the driving magnetic field of electromagnet 18, promptly do not have magnetic, or have the permanent magnet of height remanent magnetism, or electromagnet.When electromagnet was unmagnetized, the magnetic pole of fixed body 27 was to axially align and do not change as not changing among the figure "+" reach "-" shown in the symbol.In addition, when fixed body 22 was effective electromagnet, fixed body 27 can be electromagnet and operate to be similar to said fixing body 22.Though show among Fig. 3 A and the 3B that system 120 comprises converter unit 26, its function is identical with system 110 among above-mentioned Fig. 2 A and the 2B.
Another embodiment of the present invention 120 system 120 comprises a kind of configuration, and wherein electromagnet and ferromagnet are to be fixed in the casing 15, and whole casing is all reciprocal, is similar to the system 110 among above-mentioned Fig. 2 A and the 2B.
Embodiment 4
Referring to Fig. 4 A and Fig. 4 B, they are the schematic diagrames according to the magnetically driven reciprocating power range system 130 of the embodiment of the invention, and it is similar to the system shown in Fig. 2 A and Fig. 2 B.Except the different places of the following stated, the operation of magnetically driven reciprocating system 130 roughly is similar to the magnetically driven reciprocating system 110 of Fig. 2 A and Fig. 2 B, thus the assembly of representing with same numbers, its configuration and operation and above-mentioned be roughly the same.As previously discussed, fixed body 22 is that electromagnet and this are configured in the present figure and show.When fixed body 22 was electromagnet, this electromagnet can have the core of opening and closing of fault, and the core configuration of opening is presented in the present figure.Extraly, as previously discussed, but operation control unit 24 with control polarity and offer fixed body 22 and the power of electromagnet 18 so that the reciprocating motion optimization.
Experiment merit and result
Measure and computing power by experiment setting model 10 (as described in above Figure 1A and the 1B) of system, merit, sequential (timing), and power, other assembly that uses in the feature of system's 10 assemblies and the experiment is: electromagnet: industrial thermoplasticity magnet, have the power of 45W, and length is 80mm, core diameter is 25mm, and specified magnetic force is 60kg.Two nearly magnets, the diameter of each is 22mm, and length is 80mm, and material is mild steel ST37, and two nearly magnets all can use as the past complex of system 10, as described below, measure the relative displacement of these two or one of them nearly magnet.Calibrating spring is with ergometry: length approximately is 200nm, and spring constant is k=1.1kg/mm.The manufacturer of stressometer: Vishay, greatly operating value 350kg.Control unit: power supply supply 12VDC, maximum 4A operates under 2A usually.Oscilloscope: Gould475.
Note,, can suppose extremely reasonably that then function can significantly promote, as described below if use ferromagnetic material rather than above-mentioned nearly magnetic material in the experiment.
The target of experiment merit is: 1) the decision very big power of operating on nearly magnetic material, 2) the mechanical output work of measuring system, and 3) measure the electric energy input to obtain merit output.These three targets and specific experiment content are known clearly as described below.
Very big power
1) the nearly magnet of two ironys of insertion contacts with each other in the central point of electromagnet core.2) spring that will receive the displacement measurement instrument each body of packing into is received electromagnet with the electricity of 12VDC and 2A, and two individualities are attracted each other by magnetic force, and spring does not then extend.3) then under controllable situation pulling two individual so that its separate, the elongation of record spring, and the power of its generation must be enough to resist and this is two individual disconnected from each other, they will be in the magnetic field of electromagnet simultaneously.4) the spring elongation that measures is 12cm, and as previously discussed, under the spring constant effect of spring, the suction that calculates approximately is 60kg.
Output work
1) spring is pulled down from nearly magnet, magnet nearly as previously discussed inserts once again then, contact and the central authorities that put into the magnet core, fix an individuality, second body can freely shift out from core, stressometer is received the end of second body, and stressometer is mechanically received a device, and it applies controllable pulling force so that this two individual separation.2) electromagnet begins action and device also moves to spur second body, measures distraction force according to the output of stressometer, the displacement that second body moves one section S towards the direction away from another fixed body, the power value when writing down different S value.
Referring to Fig. 5, it is that figure 200 is in order to show power (kgF) and the displacement S (mm) in a series of experiments in the above-mentioned steps 2, the cartographic represenation of area power of line 204 belows and the integration of displacement function, calculate minimum power (4kg) from very big power (60kg), also can represent integration with ferromagnetic mechanical power, representative dotted line 206 among the figure connects the value that each goes up 60kg and 7mm, the reasonable linearity that is line 204 approximately is worth, and the area of dotted line 206 belows approximately equates with the area of line 204 belows, and the merit that calculates approximately is 2.35 joules (Joule).
Carry out another serial experiment again, wherein one is that fixing second body then mechanically connects a crank, it receives the axle that is equiped with flywheel again, the weight of flywheel approximately is 10kg, the merit output that measures flywheel when rotating a circle is 1.Joule, and a pulse wave that measures electromagnet again can make second body move, and makes flywheel rotate three circles, therefore the output of the merit of this body is 1.3 * 3=4.2Joule, wherein frictional force is not taken into account.
The electric energy input
Use above-mentioned body and set the measurement of testing to carry out, referring to Fig. 6 and 7, they are respectively the oscilloscope and the schematic diagram of the experiment setting of use in the electric energy input decision, experiment set to allow the sum total energy of electric pulse wave electromagnet to be measured such as to be input to, to be used for respectively organizing voltage and current response curve 310
30mm in 320 and 10mm, shown in Figure 6 as the present invention.Response curve 320, the common displacement body of its reflection 10mm is most important, the trunnion axis of Fig. 6 is with 0,10,20 ..., 50 milliseconds of (ms) scales come the express time scale.
It is 1.5Joule that the input of the rated power of 45W can be calculated intake divided by 30 milliseconds (ms).
The middle junction opinion
The value that obtains more than the use: the energy input is that 1.5Joule and merit output are 4.2Joule, and do not consider any other loss, native system can produce significant energy limit, does not measure other loss in the experiment merit, suppose that energy loses because of friction, merit output promptly reduces about 2.3Joule.
As a result, the middle junction opinion of experiment merit is a native system, has the energy input of about 1.5Joule and the merit output (comprising friction loss) of about 2.3Joule, is highly to save the energy at least, because do not have other better explanation about above-mentioned energy limit.
Following experiment
Prospective project uses another kind of system to make additional experiments, this system has the electromagnet of very big ratio (as the project 2150 among the above-mentioned MannelMagnet Ttechnik GbR website http://www.mannel-magnett.info/en_round.php, 180mm), have about 1, the magnetic force of 000kg, the input power that only has about 37W, this system be at present approximately with 380 reciprocal speed operations of per minute, and more the accurately measuring of input of planning execution power and power output.
Additional experiments will be utilized ferromagnet, rather than the nearly magnet that uses in the above-mentioned experiment, and therefore predictable is that additional experiments can produce better result on energy efficiency.
Above-described embodiment, the present invention embodiment a kind of more preferably just, the common variation that those skilled in the art carries out in the technical solution of the present invention scope and replacing all should be included in protection scope of the present invention.
Claims (20)
1. magnetically driven reciprocating system is characterized in that: described system comprises,
At least one first electromagnet, it is one axial to define to have a length direction, has one first end and one second end, and has a microscler unlatching core, and it extends to second end from first end, and core has a symmetry axis, and it is roughly with axially coaxial;
One control unit can provide one first power to input to first electromagnet and can make electromagnet have first magnetic field that changes in time, and it has roughly first utmost point of points in axial direction;
At least one fixed body has one second magnetic field, its have one roughly points in axial direction second utmost point and be configured to core roughly coaxial at first end;
At least one reciprocating type ferromagnet is configured to core roughly coaxially, and does not extend to fully outside the core at second end, can have one second magnetic field responding first magnetic field, but ferromagnet axial displacement is to respond first and second magnetic field;
And a converter unit, mechanically receive reciprocating type ferromagnet and reciprocating type ferromagnetic displacement can be changed into power output.
2. system according to claim 1 is characterized in that: described power output is not less than the input of first power.
3. system according to claim 1 is characterized in that: described converter unit comprises a mechanical energy Buffer Unit again, and it can non-stores power side by side export and send back to the input of one second power.
4. system according to claim 3 is characterized in that: but the sense power output again of described converter unit, displacement, and reciprocating type ferromagnetic speed.
5. system according to claim 4, it is characterized in that: described control unit is the in time a plurality of and electric pulse wave that changes of may command again, so that indication provides the input of first power according to data, these data are that converter unit senses reciprocating type ferromagnetic power output, displacement and speed.
6. system according to claim 5 is characterized in that: described control unit may command first power is again imported so that power output pole is big.
7. system according to claim 6 is characterized in that: described fixed body is a permanent magnetism roughly.
8. system according to claim 6 is characterized in that: described fixed body is ferromagnetic and exists second magnetic field to respond first magnetic field.
9. system according to claim 8 is characterized in that: described fixed body is adiaphorous electromagnet.
10. system according to claim 6 is characterized in that: described fixed body is effective electromagnet.
11. system according to claim 10 is characterized in that: described second magnetic field roughly maintains necessarily.
12. system according to claim 10 is characterized in that: described second magnetic field changes along with the variation in first magnetic field.
13. system according to claim 6 is characterized in that: described first electromagnet and reciprocating type ferromagnet are fixed on a common casing, but and it is characterized in that casing axial displacement is to respond first and second magnetic field.
14. the method for the reciprocating type generation of operation one a magnetic system may further comprise the steps:
Step 1 is taken at least one first electromagnet, and it is one axial to define to have a length direction, has one first end and one second end, and has a microscler unlatching core, and it extends to second end from first end, and core has a symmetry axis, and it is roughly with axially coaxial;
Step 2 provides one first power to input to first electromagnet with a control unit, and can make electromagnet have first magnetic field that changes in time, and it has roughly first utmost point of points in axial direction;
At least one fixed body of step 3 configuration, it is roughly coaxial at first end and nucleus, and this fixed body has one second magnetic field, and it has second utmost point of points in axial direction roughly;
At least one reciprocating type ferromagnet of step 4 configuration makes itself and core roughly coaxial, and does not extend to fully outside the core at second end, have one second magnetic field responding first magnetic field, but ferromagnet axial displacement is to respond first and second magnetic field;
Step 5 mechanically connects a converter unit to reciprocating type ferromagnet, and converter unit changes into power output with reciprocating type ferromagnetic displacement.
15. method according to claim 14 is characterized in that: described unit comprises a mechanical energy buffer cell again, and it can non-stores power side by side export and send back to the input of one second power.
16. method according to claim 14 is characterized in that: but the sense power output again of described converter unit, displacement, and reciprocating type ferromagnetic speed.
17. method according to claim 16, it is characterized in that: describedly indicate according to data, these data are meant that converter unit senses reciprocating type ferromagnetic power output, displacement and speed, and control unit is that the in time a plurality of and electric pulse wave that changes of may command is to provide the input of first power.
18. method according to claim 17 is characterized in that: described control unit is controlled the input of first power so that power output pole is big.
19. method according to claim 18 is characterized in that: described fixed body is a permanent magnetism roughly.
20. method according to claim 18 is characterized in that: described fixed body is ferromagnetic and exists second magnetic field to respond first magnetic field.
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| US82223706P | 2006-08-13 | 2006-08-13 | |
| US60/822,237 | 2006-08-13 | ||
| US11/692,950 | 2007-03-29 |
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| CN106849589A (en) * | 2017-01-24 | 2017-06-13 | 瑞声科技（南京）有限公司 | The adjusting method of vibrating motor and its working frequency |
| CN111766816A (en) * | 2020-07-14 | 2020-10-13 | 广东旭龙物联科技股份有限公司 | Automatic control oscillator |
| CN111900851A (en) * | 2020-07-20 | 2020-11-06 | 广东旭龙物联科技股份有限公司 | Oscillator control circuit, oscillator control device and laser identification code scanning system |
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