CN1137017A - Electromagnet excitation type self-excited oscillating type vibrator - Google Patents
Electromagnet excitation type self-excited oscillating type vibrator Download PDFInfo
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- CN1137017A CN1137017A CN96102973A CN96102973A CN1137017A CN 1137017 A CN1137017 A CN 1137017A CN 96102973 A CN96102973 A CN 96102973A CN 96102973 A CN96102973 A CN 96102973A CN 1137017 A CN1137017 A CN 1137017A
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- 230000005284 excitation Effects 0.000 title claims description 18
- 238000006073 displacement reaction Methods 0.000 claims description 26
- 230000010355 oscillation Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 6
- 230000004907 flux Effects 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
- B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
- B06B1/04—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with electromagnetism
- B06B1/045—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with electromagnetism using vibrating magnet, armature or coil system
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
- Jigging Conveyors (AREA)
Abstract
The invention aims at leading a rapping device stimulated by an electromagnet to start self-oscillation reliably. A solenoid coil 9 entwined on an electromagnet core 8 fixed on an oscillation drive 7, namely, the electromagnet 7 is connected with a diode 13; consequently even if a tiny current change can also reliably start self-oscillation.
Description
The present invention relates to the self-excited oscillating type vibrator of electromagnet excitation type.
For example, can issue in the census of manufacturing in (1992) " vibration applications technology " and disclose a kind of self-excited oscillating type vibrator as shown in Figure 8.
Fig. 8 represents C/LOOP, and general phase delay at open loop transfer function is that 180 ° frequency (phase place point of interface) will go up the gain of open loop transfer function when 1 (stability boundaris) is above, as circuit closed then will be produced autoexcitation.For improving the self-oscillatory characteristic of building up, gain fully must be increased (for example gain for stability boundaris 100 times).The detailed content of this gain not only has vibrating detector gain, controller gain, and the power amplifier gain also comprises the I/O map gain of vibratory driver.Yet when vibratory driver was electromagnet, its electric current-attractive force characteristic had the quadratic nonlinearity characteristic as shown in Figure 9.Therefore, when electric current is approximately zero (scope A), the I/O map also vanishing (slope approximates zero) that gains can not realize the high gain of open loop characteristic, thereby can not cause autoexcitation.
The self-excited oscillating type vibrator that the purpose of this invention is to provide a kind of electromagnet excitation type, even almost dead-beat state before producing autoexcitation, the I/O map gain of electromagnet is also non-vanishing, but has certain value, can make the open loop transmission characteristic reach high gain, thereby when with circuit closed, can produce autoexcitation reliably.
For reaching above purpose, the self-excited oscillating type vibrator of electromagnet excitation type of the present invention has the vibration displacement detector of the vibration displacement that is used for detecting vibration machine, with the output of vibration displacement detector as negative-feedback signal and the autoexcitation controller that amplified with feedback gain, the output of this controller is carried out the power amplifier of power gain, and the electromagnet that receives the output of this power amplifier, the magnetic attracting force that produces by means of the electric current that flows through this magnet coil is encouraged above-mentioned vibration machine and is shaken, and this self-excited oscillating type vibrator is characterised in that: connect a diode on above-mentioned magnet spool.
For reaching above purpose, the self-excited oscillating type vibrator of electromagnet excitation type of the present invention has the vibration displacement detector of the vibration displacement that is used for detecting vibration machine, with the output of vibration displacement detector as negative-feedback signal and the autoexcitation controller that amplified with feedback gain, the output of this controller is carried out the power amplifier of power gain, and the electromagnet that receives the output of this power amplifier, the magnetic attracting force that produces by means of the electric current that flows through this magnet coil is encouraged above-mentioned vibration machine and is shaken, and the feature of this self-excited oscillating type vibrator also is: comprise permanent magnet in above-mentioned electromagnet.
For reaching above purpose, the self-excited oscillating type vibrator of electromagnet excitation type of the present invention has the vibration displacement detector of the vibration displacement that is used for detecting vibration machine, with the output of vibration displacement detector as negative-feedback signal and the autoexcitation controller that amplified with feedback gain, the output of this controller is carried out the power amplifier of power gain, and the electromagnet that receives the output of this power amplifier, the magnetic attracting force that produces by means of the electric current that flows through this magnet coil is encouraged above-mentioned vibration machine and is shaken, and the feature of this self-excited oscillating type vibrator also is: flow through constant DC stream in above-mentioned magnet spool.
As the invention according to claim 1, even then change under the little situation at electric current, the aviation value of its I/O map gain is also non-vanishing, but has certain finite value, by means of this gain, the autoexcitation that can promptly build up vibration machine.
As invention according to claim 2, by in magnet spool, flowing through constant DC stream, though then electric current-attractive force is a square characteristic, but be added in because of this current value on the electric current of subtle change, can in square characteristic of this regional electric current attractive force, obtain certain limited input and output gain, the therefore autoexcitation that can promptly build up vibration machine equally.
As invention according to claim 3, then because the magnetic flux of the permanent magnet that often exists electromagnet and comprised in the magnetic flux of electromagnet, so even it is small to flow through the electric current of coil, but in a certain zone of electric current attractive force square characteristic, can obtain limited input and output gain, thereby this vibration machine can produce autoexcitation reliably.
Fig. 1 is the block diagram of the electromagnet excitation type self-excited oscillating type vibrator of the embodiment of the invention.
Fig. 2 is the part front elevation of the concrete structure of vibratory driver 7 in the presentation graphs 1.
Fig. 3 is the time diagram of its action usefulness of explanation.
Fig. 4 is the electric current-attractive force performance diagram of its action usefulness of expression.
Fig. 5 is the front elevation of the main portion of vibratory driver among expression the present invention the 2nd embodiment.
Fig. 6 is the block diagram of the autoexcitation controller in the self-excited oscillating type vibrator of the present invention the 3rd embodiment.
Fig. 7 is the electric current-attractive force graph of relation of its action usefulness of expression.
Fig. 8 is the block diagram of the self-excited oscillating type vibrator of conventional example.
Fig. 9 is the electric current-attractive force performance diagram of its action usefulness of expression.
Nomenclature:
1 self-excited oscillating type vibrator
2 vibrating machines
3 vibration displacement detectors
5 autoexcitation controllers
The 8a permanent magnet
9 magnet coils
13 diodes
15 adders
Below, with reference to the description of drawings embodiments of the invention.
Figure 1 shows that the electromagnet excitation type self-excited oscillating type vibrator of the embodiment of the invention, it is totally with 1 expression, vibrating machine 2 is vibration feeders in the present embodiment, its part shown in Figure 2, the output of the vibration displacement detector 3 of close vibration feeder configuration supplies to amplitude controller 4.Amplitude controller 4 has well-known structure, is used to set the specified amplitude value, and the output with vibration displacement detector 3 here compares, and is derived by circuit c with the cooresponding output of both differences.Autoexcitation controller 5 is made of alternate amplifier 11 and saturation limiter 12 as shown in Figure 6, and the output supply lines c of this controller 5 is amplified by power amplifier 6, and it amplifies output and is fed into vibratory driver 7.In the present embodiment, as shown in Figure 2, vibratory driver 7 is the electromagnet excitation mechanisms of shaking, by E shape fixed electromagnet iron core 8 with twine magnet coil 9 thereon and constitute movable part M and fixed part T inclination leaf spring 10 connections across space G and the armature S that iron core is oppositely arranged by pressing the equal angles arranged spaced.Above-mentioned vibration displacement detector 3 is near 10 configurations of inclination leaf spring, and it is a kind of eddy current type detector, and its output supplies to amplitude controller 4.In addition, according to the present invention, on magnet coil 9, connected a diode 13.And the self activated magnetic resistance of this system's magnetic circuit also changes along with the space G between armature S and the fixed electromagnet iron core 8, vibrates with resonant frequency in magnetic vibration.Therefore, the phase difference of power and displacement is 90 °, and the phase difference of voltage and electric current is 90 °, so in the C/LOOP shown in Fig. 1, the output via line a inverse feedback of vibration displacement detector 3 is to autoexcitation controller 5, constitute 180 ° phase difference as a whole, therefore may produce autoexcitation.
The structure of the electromagnet excitation type self-excited oscillating type vibrator of the embodiment of the invention below describes its action as mentioned above.
Not shown direct supply is connected in power amplifier 6 by switch, by with this switch closure, produce autoexcitation and make vibrating machine begin vibration, according to present embodiment, on being the magnet coil 9 of electromagnet, connecting diode 13 at vibratory driver 7, so electric current over time as shown in Figure 3, be asymmetric with respect to time shaft.Promptly, the relation of electric current and attractive force (nonlinear square of characteristic) as shown in Figure 4, when electric current is very small, at initial point place at zero point, its slope is zero, when electric current changes as shown in Figure 3, even change small, but electric current-attractive force, be that I/O map gain has identical symbol, so still can have certain aviation value.Therefore, in C/LOOP shown in Figure 1, can promptly begin autoexcitation, vibrating machine can carry out self-excited vibration subsequently reliably.
In addition, in the present embodiment, because autoexcitation controller 5 has saturation limiter 12, it accepts the output of amplitude controller 4, its clip level amplitude is changed with deviation, therefore can make the regulation amplitude vibration of movable part M in amplitude controller 4, to set of vibrating machine 2.In above structure, illustrate, vibratory driver 7 produces 90 ° phase delay in the ideal case, but be discrepant in fact with 90 °, so also can increase the link with phase delay function in autoexcitation controller 5, the output that therefore can make vibration displacement detector 3 in the C/LOOP of Fig. 1 is carried out inverse feedback with respect to the outlet line of vibratory driver 7 with 180 ° of phase delays accurately.Therefore vibrating machine 2 can resonant vibration, and can carry out follow-up control.
Fig. 5 illustrate the vibratory driver 7 of the present invention the 2nd embodiment ', be marked with identical symbol with cooresponding part in the foregoing description, its detailed explanation is omitted.
In the present embodiment promptly, permanent magnet 8a is contained in fixed electromagnet iron core 8 ' integral body of interior formation.Therefore, generation constant flux B as shown by arrows
0Even so flow through the electric current of magnet coil 9 is zero, but in square characteristic of having mentioned already as shown in Figure 7, add in the B zone under the situation of Weak current, just can produce certain attractive force, therefore the I/O map gain has the value (slope in B zone) of approximately constant, vibrating machine 2 is easy to begin autoexcitation, and can stably move.That is the constant flux component B that produces at permanent magnet 8a,
0On add the change component B that produces by Weak current.Therefore, when the Weak current of generations such as the detection electric current of detector 3, noise flows through magnet coil 9,,, can begin autoexcitation so the aviation value of input and output gain can not be zero owing to be in positive regional change.And on the other hand, as do not have constant flux component B0, then because of (+) (-) regional change of Weak current, so I/O map gain vanishing just can not begin autoexcitation at close 0.
Fig. 6 illustrates the autoexcitation controller 5 of the present invention the 3rd embodiment, identical with the 1st embodiment have alternate amplifier 11 and a saturation limiter 12, but the output of saturation limiter 12 is fed into adder 15, and this supplies with constant DC stream as the constant current instruction.Therefore, vibratory driver 7 ' magnet coil 9 in flow through constant DC stream, attract in the characteristic at electric current shown in Figure 7, when crossing Weak current with the 2nd embodiment same stream, have with the slope in this B zone is the I/O map gain of foundation, therefore can begin autoexcitation reliably equally, and can stably move.
As mentioned above, according to embodiments of the invention,, can begin autoexcitation reliably though the electromagnet excitation mode of shaking has nonlinear square of characteristic.
Embodiments of the invention more than being described, certainly, having the invention is not restricted to this, is that the basis can have various distortion with technological thought of the present invention.
For example, in above embodiment, vibrating machine 2 supposition are vibration feeders, can be applicable to generally have all vibrating machines that electromagnetism is encouraged the mechanism of shaking but it can be revised as.
In addition, in above embodiment, as vibrating detector 3, make it near leaf spring 10, and adopt the detector of so-called eddy current type, but not limited certainly, for example also piezoelectric element (constituting with lead zirconates) can be installed on the movable part M, its output is carried out 2 integrations and supplied with amplitude amplifier 4.
As mentioned above, as adopt electromagnet excitation type self-excited oscillating type vibrator of the present invention,, still can begin self-excited vibration reliably although then the relation of power and electric current is non-linear.
Claims (5)
1. electromagnet excitation type self-excited oscillating type vibrator, it has the vibration displacement detector of the vibration displacement that is used for detecting vibration machine, with the output of vibration displacement detector as negative-feedback signal and the autoexcitation controller that amplified with feedback gain, the output of this controller is carried out the power amplifier of power gain, and the electromagnet that receives the output of this power amplifier, the magnetic attracting force that produces by means of the electric current that flows through this magnet coil is encouraged above-mentioned vibration machine and is shaken, and this self-excited oscillating type vibrator is characterised in that: connect a diode on above-mentioned magnet spool.
2. electromagnet excitation type self-excited oscillating type vibrator, it has the vibration displacement detector of the vibration displacement that is used for detecting vibration machine, with the output of vibration displacement detector as negative-feedback signal and the autoexcitation controller that amplified with feedback gain, the output of this controller is carried out the power amplifier of power gain, and the electromagnet that receives the output of this power amplifier, the magnetic attracting force that produces by means of the electric current that flows through this magnet coil is encouraged above-mentioned vibration machine and is shaken, and this self-excited oscillating type vibrator is characterised in that: comprise permanent magnet in above-mentioned electromagnet.
3. electromagnet excitation type self-excited oscillating type vibrator, it has the vibration displacement detector of the vibration displacement that is used for detecting vibration machine, with the output of vibration displacement detector as negative-feedback signal and the autoexcitation controller that amplified with feedback gain, the output of this controller is carried out the power amplifier of power gain, and the electromagnet that receives the output of this power amplifier, the magnetic attracting force that produces by means of the electric current that flows through this magnet coil is encouraged above-mentioned vibration machine and is shaken, and the feature of this self-excited oscillating type vibrator also is: flow through constant DC stream in above-mentioned magnet spool.
4. according to any one described electromagnet excitation type self-excited oscillating type vibrator in the claim 1～3, it is characterized in that: the saturation level of the saturation element that is equipped with in the above-mentioned autoexcitation controller can change according to the output of above-mentioned vibration displacement detector.
5. according to any one described electromagnet excitation type self-excited oscillating type vibrator in the claim 1～4, it is characterized in that: above-mentioned autoexcitation controller has the phase delay function, and the resonant frequency of above-mentioned vibration machine is consistent with the frequency of self-excited vibration.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP09773995A JP3603376B2 (en) | 1995-03-29 | 1995-03-29 | Self-excited vibration type vibration device with electromagnet excitation method |
| JP97739/95 | 1995-03-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1137017A true CN1137017A (en) | 1996-12-04 |
Family
ID=14200272
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96102973A Pending CN1137017A (en) | 1995-03-29 | 1996-03-28 | Electromagnet excitation type self-excited oscillating type vibrator |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP3603376B2 (en) |
| KR (1) | KR100376007B1 (en) |
| CN (1) | CN1137017A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104736460A (en) * | 2012-10-10 | 2015-06-24 | Ntn株式会社 | Vibrating parts transport device |
| CN108336882A (en) * | 2018-04-04 | 2018-07-27 | 北京航空航天大学 | A kind of beam type microdrive based on electromagnetism self-excited vibration principle |
| CN112996558A (en) * | 2018-09-27 | 2021-06-18 | 约纳·佩莱德 | Method and apparatus for multi-channel simultaneous high power magnetic coil driver |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006008401A (en) * | 2004-06-29 | 2006-01-12 | Nitto Seiko Co Ltd | Parts supply device |
| CN109959495B (en) * | 2019-04-09 | 2021-03-02 | 哈尔滨工业大学 | Vibration table negative feedback failure detection system of device redundancy particle collision detection device and detection method thereof |
-
1995
- 1995-03-29 JP JP09773995A patent/JP3603376B2/en not_active Expired - Lifetime
-
1996
- 1996-03-25 KR KR1019960008129A patent/KR100376007B1/en not_active Expired - Fee Related
- 1996-03-28 CN CN96102973A patent/CN1137017A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104736460A (en) * | 2012-10-10 | 2015-06-24 | Ntn株式会社 | Vibrating parts transport device |
| CN108336882A (en) * | 2018-04-04 | 2018-07-27 | 北京航空航天大学 | A kind of beam type microdrive based on electromagnetism self-excited vibration principle |
| CN112996558A (en) * | 2018-09-27 | 2021-06-18 | 约纳·佩莱德 | Method and apparatus for multi-channel simultaneous high power magnetic coil driver |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3603376B2 (en) | 2004-12-22 |
| KR100376007B1 (en) | 2003-07-18 |
| KR960033565A (en) | 1996-10-22 |
| JPH08267007A (en) | 1996-10-15 |
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