CN100567731C - The method for driving of electromagnetic pump - Google Patents
The method for driving of electromagnetic pump Download PDFInfo
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- CN100567731C CN100567731C CNB2004800297934A CN200480029793A CN100567731C CN 100567731 C CN100567731 C CN 100567731C CN B2004800297934 A CNB2004800297934 A CN B2004800297934A CN 200480029793 A CN200480029793 A CN 200480029793A CN 100567731 C CN100567731 C CN 100567731C
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- 238000000034 method Methods 0.000 title claims abstract description 29
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- 239000000696 magnetic material Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000002040 relaxant effect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
- F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
- F04B17/04—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors using solenoids
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
- F04B49/065—Control using electricity and making use of computers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B2203/00—Motor parameters
- F04B2203/04—Motor parameters of linear electric motors
- F04B2203/0402—Voltage
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Electromagnetic Pumps, Or The Like (AREA)
- Control Of Positive-Displacement Pumps (AREA)
- Control Of Linear Motors (AREA)
- Reciprocating, Oscillating Or Vibrating Motors (AREA)
Abstract
The invention provides the method for driving of the electromagnetic pump of noise that minimizing causes along with the rapid pressure oscillation in the pump chamber or vibration.Voltage change when electromagnetic coil drives the pole reversal of the pulsed voltage that alternately applies at positive side and minus side with the pulsed voltage that applies has at least at continuous incline section between side and the minus side just.
Description
Technical field
The present invention relates to the method for driving of electromagnetic pump, relate to the method for driving of the electromagnetic pump that uses in the fluids such as conveying gas and liquid in more detail.
Background technique
This case claimant has proposed a kind of thin electromagnetic pump of miniaturization, this electromagnetic pump at first in the cylinder body of stator side, place can free reciprocating action movable piece, by to embedding the single-phase electromagnetic coil electricity around the cylinder body, in the pump chamber that between the both ends of the surface of the movement direction bi-side of movable piece and cylinder body, forms, in a pump chamber, suck fluid from the outside by the 1st valve, pass through the 2nd valve again, in another pump chamber, also play same pumping action to outside discharge currents body.By electromagnetic coil is switched on, electromagnetic coil is subjected to the electromagnetic force of self-magnetic field, and as the reaction of this power, movable piece moves (with reference to patent documentation 1) along the axial direction of cylinder body.
Patent documentation 1: special hope 2002-286188
As the method for driving of above-mentioned electromagnetic pump, there are the two ends of pair electromagnetic coil to add that the energising direction of the electric current of square-wave voltage shown in Figure 14 and the mobile electromagnetic coil of switching drives the method for movable piece.In Figure 14, the 1st suction valve and the 1st expulsion valve and the on-off action of the 2nd suction valve and the 2nd expulsion valve and the relation of driving voltage that are provided with in the expression pump chamber.For example, if electromagnetic coil is added positive square wave drive voltage, and the 1st suction valve of pump chamber is opened, and the 1st expulsion valve cuts out, and makes fluid flow into pump chamber.In addition, the 2nd expulsion valve is opened, and the 2nd suction valve closure makes fluid flow out from pump chamber.In addition, if electromagnetic coil is added negative square wave drive voltage, and the 1st expulsion valve of pump chamber is opened, and the 1st suction valve closure makes fluid flow out from pump chamber.In addition, the 2nd suction valve is opened, and the 2nd expulsion valve cuts out, and makes fluid flow into pump chamber.
In the method for driving of above-mentioned electromagnetic pump, in electromagnetic coil, also flow through the electric current of approximate square wave, the thrust that movable piece is produced also becomes approximate square wave.Thereby, positive and negative when reverse in the polarity of driving voltage, in pump chamber, produce rapid pressure oscillation, because drastic change to the power of the internal surface effect of pump chamber, and the cylinder body wall produces vibration, because to the drastic change of the electromagnetic force of the electromagnetic coil effect of stator side, and stator produces vibration.In addition, when the 1st suction valve and the 2nd expulsion valve or the 1st expulsion valve and the 2nd suction valve are opened, the chucking face of the frame part that forms pump chamber is produced powerful collision and during chucking, will produce noise or vibration.
Have again, though owing to the variation in pressure that causes in the pump chamber that moves along with movable piece, then the 1st suction and expulsion valve and the 2nd suction and expulsion valve open and close, but valve whichsoever, with when closed condition is opened, compare, when open mode is closed, because fluid temporarily flows along the direction opposite with just now flow direction, thereby the closing some time that will lag behind of valve.At this moment, the fluid of reverse flow and valve produce and impact.The high fluid splenium branch of instantaneous generation in narrow circulation flow path, this just causes so-called water hammer.Because this water hammer will produce noise or vibration.For example, in the method for driving that applies square wave drive voltage shown in Figure 14, detected the noise figure of 33dB.
The present invention proposes in order to address these problems just, the method for driving of the noise that minimizing caused along with the change of the abrupt pressure in the pump chamber when its purpose was to be provided at the driving electromagnetic pump or the electromagnetic pump of vibration.
Summary of the invention
The present invention has following formation in order to achieve the above object.In cylinder body, place movable body at electromagnetic pump with permanent magnet, by switching on to embedding this cylinder body hollow electromagnetic coil on every side, make movable body in cylinder body along axial direction reciprocating action, the method for driving of the electromagnetic pump of the pump chamber conveyance fluid that in cylinder body, forms, for electromagnetic coil drive with and the pulsed voltage that applies, the voltage change the during pole reversal of the pulsed voltage that this pulsed voltage alternately applies at positive side and minus side has at least at continuous incline section between side and the minus side just.
In addition, the electric current that passes through in the method detection electromagnetic coil as other, the electric current when current polarity is reverse changes the impulsive current that has incline section continuous between positive side and minus side at least and flows through.
In addition,, apply pulsed voltage or impulsive current flows through as other method, when the pole reversal of the driving voltage of electromagnetic coil or electrical current, have voltage or current value and be zero during.
Have again,, apply pulsed voltage or impulsive current and flow, when the pole reversal of the driving voltage of electromagnetic coil or electrical current, make to apply 30% bias current smaller or equal to maximum voltage value as other method.
According to above-mentioned electromagnetic pump method for driving, owing to carry out such energising control, make for electromagnetic coil drive with and apply pulsed voltage, the voltage change of this pulsed voltage when the polarity inversion of the pulsed voltage that positive side and minus side alternately apply has at least at continuous incline section between side and the minus side just, perhaps detect the electric current that passes through in the electromagnetic coil, electric current when current polarity is reverse changes the impulsive current that has incline section continuous between positive side and minus side at least and flows through, so the excitation direction of electromagnetic coil is not sharply oppositely.Thereby, make the travelling speed of movable piece unhappy, can reduce the rapid pressure oscillation of pump chamber, can reduce the vibration of the cylinder body wall that the drastic change owing to the power of the internal surface that acts on pump chamber causes.In addition, also can reduce the vibration of the stator that the drastic change owing to the electromagnetic force of the electromagnetic coil that acts on stator side causes.Have again, can reduce the adverse current of fluid when suction valve or expulsion valve are closed, relax water hammer, can reduce noise or generation of vibration.
In addition, apply pulsed voltage or impulsive current flows through if make, when the pole reversal of the driving voltage of electromagnetic coil or electrical current, have voltage or current value and be zero during, then the speed of the fluid of pump chamber when suction valve or expulsion valve are closed slows down, can reduce adverse current, relax water hammer, can reduce noise or generation of vibration.
Have again, apply pulsed voltage or impulsive current flows through by making, when the pole reversal of the driving voltage of electromagnetic coil or electrical current, have in advance apply smaller or equal to 30% bias voltage of maximum voltage value or smaller or equal to 30% bias current of lowest high-current value flow through during, thereby before the maximum current of the maximum voltage that applies the pole reversal or the pole reversal flows through, the speed of the fluid of pump chamber when suction valve or expulsion valve are closed slows down, can reduce adverse current, relax water hammer, can reduce noise or generation of vibration.By adjusting bias voltage or bias current, carry out weak excitation along the opposite direction of the direction of the thrust that acts on movable piece, can relax the skew that acts on the thrust of movable piece under the no excited state.
In addition, by at voltage or current value be zero during before, before perhaps during applying that bias voltage or bias current flow through, apply 30% small pulsed voltage more than or equal to maximum voltage value, perhaps 30% small impulsive current more than or equal to lowest high-current value flows through, thereby can shorten the excitation time that the excited state that weakens electromagnetic coil is just now used, therefore can reduce the reduction of pump efficiency.
Description of drawings
Fig. 1 is the driving voltage waveform figure of the relevant electromagnetic pump of the 1st embodiment.
Fig. 2 is the driving voltage waveform figure of the relevant electromagnetic pump of the 1st embodiment.
Fig. 3 is the driving voltage waveform figure of the relevant electromagnetic pump of the 1st embodiment.
Fig. 4 is the driving voltage waveform figure of the relevant electromagnetic pump of the 1st embodiment.
Fig. 5 is the driving voltage of the relevant electromagnetic pump of the 2nd embodiment or the oscillogram of electrical current.
Fig. 6 is the driving voltage of the relevant electromagnetic pump of the 2nd embodiment or the oscillogram of electrical current.
Fig. 7 is the driving voltage of the relevant electromagnetic pump of the 3rd embodiment or the oscillogram of electrical current.
Fig. 8 is the driving voltage of the relevant electromagnetic pump of the 3rd embodiment or the oscillogram of electrical current.
Fig. 9 is driving voltage or the oscillogram of electrical current and the sequential chart of the open and-shut mode of expression suction valve and expulsion valve of the relevant electromagnetic pump of the 3rd embodiment.
Figure 10 is the driving voltage of the relevant electromagnetic pump of the 4th embodiment or the oscillogram of electrical current.
Figure 11 A and Figure 11 B are the explanatory drawing of the full-gear of expression expulsion valve.
Figure 12 A and Figure 12 B are the explanatory drawing of the full-shut position of expression expulsion valve.
Figure 13 is the integrally-built sectional view of expression electromagnetic pump.
Figure 14 is the driving voltage waveform figure of electromagnetic pump in the past and the sequential chart of representing the open and-shut mode of suction valve and expulsion valve.
Embodiment
Following with reference to description of drawings electromagnetism pump structure, the best example of the electromagnetic pump method for driving that the present invention is relevant is described simultaneously.The electromagnetic pump of this example can be widely used in following electromagnetic pump, promptly in cylinder body, place movable piece with permanent magnet, by switching on to embedding this cylinder body hollow electromagnetic coil on every side, make movable piece in cylinder body along axial direction reciprocating action, the pump chamber conveyance fluid that forms in the cylinder body.
In Figure 13, the exemplary configuration of electromagnetic pump is described.Movable piece 10 is placed in the airtight cylinder body, and being arranged to can be along the axial direction reciprocating action of cylinder body.Movable piece 10 has a pair of inner yoke 14a and the 14b that forms discoideus magnetic 12 and magnetic 12 is clamped along thickness direction.Magnetic 12 is along thickness direction (above-below direction of Figure 13) one side to be magnetized as the N utmost point, with the permanent magnet of another side magnetization as the S utmost point.Inner yoke 14a and 14b utilize magnetic material to form, and each inner yoke 14a and 14b have the plate part 15a that forms than the slightly larger in diameter of magnetic 12 and be the flange portion 15b that the brief note shape is holded up at the peripheral part of plate part 15a.The outer circumferential face of flange portion 15b becomes the magnetic flux that produced by the magnetic 12 flux interaction face in movable piece 10 1 sides.
Seal, sealing materials 16 is the nonmagnetic substances such as plastics that cover the outer lateral side of magnetic 12.Seal, sealing materials 16 has the effect that magnetic 12 is got rusty or do not make magnetic 12 expose covering effect outside and magnetic 12 and inner yoke 14a and 14b be formed one.Seal, sealing materials 16 is provided with like this, makes the circumferential lateral surface of the magnetic 12 that filling is clamped by inner yoke 14a and 14b, but that the outer circumference diameter of seal, sealing materials 16 forms is more smaller than the outer circumference diameter of inner yoke 14a and 14b.
Below, the structure of the stator side of the electromagnetic pump among Figure 13 is described.With a pair of upper frame body 20a and lower frame body 20b combination of making by nonmagnetic substance, form cylinder body cylindraceous, in this cylinder body, place above-mentioned movable piece 10, back and forth moving part.In this example, the frame body 22b that forms nullisomic part 24 cylindraceous and lower frame body 20b forms as one.It is chimeric to make the frame body 22a of the end of this cylinder part 24 and upper frame body 20a go up the telescoping groove 28 that is provided with, and by utilizing a pair of framework 20a and 20b like this, forms the cylinder body of axial both ends of the surface sealing.The position that contacts at the end face with cylinder part 24 of telescoping groove 28 is provided with sealing material 29, contacts with sealing material 29 by the end face with cylinder part 24, and will taking out in the body relatively, the outside seals.In addition, also can cylinder part 24 be extended out from upper frame body 20a, 20b be chimeric with lower frame body.In addition, also can separately form cylinder part 24 and upper frame body 20a and lower frame body 20b.
Like this, the both ends of the surface of cylinder body are utilized upper frame body 20a and lower frame body 20b sealing, at the movement direction bi-side of movable piece 10 and each self-forming pump chamber 30a and 30b between the internal face of framework 20a and 20b up and down. Pump chamber 30a and 30b are equivalent to the gap that forms between the frame body 22b of the frame body 22a of the both ends of the surface of movable piece 10 and upper frame body 20a and lower frame body 20b.In addition, movable piece 10 with the internal surface state of contact of nullisomic part 24 under, in sealing state lower slider airtight with nullisomic part 24 or that liquid is close.For the sliding that makes movable piece 10 is good, apply the fluorine resin coating or DLC (diamond-like-carbon) coating etc. has the coating of lubricity and antirust ability concurrently at the outer circumferential face of inner yoke 14a and 14b.In addition, the anti-rotation block that prevents that movable piece 10 from along the circumferential direction rotating can also be set.
End face (internal face) mounting shock absorber 32 at frame body 22a and 22b.Impact when vibration damper 32 contacts with the end face of frame body 22a and 22b in order to absorb inner yoke 14a and 14b is provided with.In addition, vibration damper 32 also can be arranged on the face that the end face of inner yoke 14a and 14b contacts with frame body 22a and 22b, to replace being arranged on the end face of frame body 22a and 22b.
In the frame body 22a of upper frame body 20a, the 1st suction valve 34a and the 1st expulsion valve 36a are set, 30a is communicated with pump chamber.In the frame body 22b of lower frame body 20b, the 2nd suction valve 34b and the 2nd expulsion valve 36b are set, 30b is communicated with pump chamber.
In upper frame body 20a and lower frame body 20b, the suction circulation path 38a and the 38b that are communicated with suction valve 34a and 34b are set.In addition, in upper frame body 20a lower frame body 20b, the discharge circulation path 40a and the 40b that are communicated with the 1st and the 2nd expulsion valve 36a and 36b are set.The suction of upper frame body 20a utilizes connecting tube 42 to be communicated with the suction of lower frame body 20b with flow path 38b with circulation path 38a, and the discharge of upper frame body 20a utilizes connecting tube 44 to be communicated with the discharge of lower frame body 20b with circulation path 40b with circulation path 40a.By like this, the suction of upper frame body 20a and lower frame body 20b is with circulation path and discharge and be communicated with a suction port 38 and an exhaust port 40 respectively with circulation path.
In Figure 13, embedded space electromagnetic coil 50a and 50b around cylinder body.Electromagnetic coil 50a and 50b leave some configuration a little along the cylinder body axial direction, and feasible central position with respect to the cylinder body axial direction becomes symmetrical position.The axial length that electromagnetic coil 50a and 50b set is longer than the movable range of the flange portion 15b of inner yoke 14a and 14b.In addition, electromagnetic coil 50a and electromagnetic coil 50b are such settings, make their direction of winding opposite, utilize same power supply energising, flow through reverse electric current mutually.Why make the direction of winding of electromagnetic coil 20a and 50b opposite, be for make act on the electromagnetic coil 50a of the magnetic flux interlinkage of magnetic 12 and 50b in the power of the electric current that flows through overlapping, act on movable piece 10 as counter-force, this power becomes thrust.
By electromagnetic coil 50a and 50b are passed to alternating current, then movable piece 10 utilizes the effect of the electromagnetic force of electromagnetic coil 50a and 50b generation, is back and forth driven (knee-action).The electromagnetic force that electromagnetic coil 50a and 50b produce depends on the energising direction to electromagnetic coil 50a and 50b, movable piece 10 is promoted to a certain direction and opposite direction, utilize not shown control unit, to the current"on"time of electromagnetic coil 50a and 50b and energising direction, can back and forth drive movable piece 10 by control with stroke suitably.Vibration damper 32 is members of the impact that produces when being absorbed in movable piece 10 and contacting with the internal surface of frame body 22a and 22b.
The pumping action of the electromagnetic pump of this example is to utilize electromagnetic coil 50a and 50b to make movable piece 10 reciprocal moving parts, thereby pump chamber 30a and 30b inner fluid alternately are inhaled into and discharge, and utilizes this effect to finish the pump action.That is, under the state of Figure 13, if movable piece 10 moves downwards, then fluid is inhaled into a pump chamber 30a, and fluid is discharged from another pump chamber 30b simultaneously.In addition, otherwise if movable piece 10 is moved upward, fluid is discharged from a pump chamber 30a, and fluid is inhaled into another pump chamber 30b simultaneously.Like this, no matter during to which side shifting, fluid all sucks and discharges at movable piece 10, pulsation that can suppression fluid, conveyance fluid effectively.
The electromagnetic pump of this example can be used in conveying gas or liquid, is not limited to the kind of fluid.When using, with the discharge pressure of a movable piece 10 when not enough, as long as use the unit movable piece of the same shape that magnetic 12 and inner yoke 14a and 14b are constituted to be connected a plurality of and multi-stage type movable piece 10 formation as liquid pump.By multistage connection unit movable piece, can form movable piece with high thrust, can form electromagnetic pump with needed discharge pressure.
Here, with reference to Figure 11 A and B and Figure 12 A and B, an example of the expulsion valve 55 that constitutes the 1st and the 2nd expulsion valve 36a and 36b is described.Figure 11 represents the full-gear of expulsion valve 55, and Figure 12 represents the full-shut position of expulsion valve 55.Expulsion valve 55 is discharged pump chamber 30a and 30b and the 1st and the 2nd and is opened and closed with the circulation path between circulation path 40a and the 40b.The the 1st and the 2nd valve body 56 of discharging with circulation path 40a and 40b one side that is configured in of expulsion valve 55 utilizes axle 58 to link into an integrated entity with the baffle plate 57 that is configured in pump chamber 30a and 30b one side.Utilize the pump chamber 30a of mobile generation of above-mentioned movable piece 10 and the variation in pressure of 30b, expulsion valve 55 moves along the valve shaft direction.Form supporting surface (inclined-plane) 60 on the valve body 56, on the valve seat part 59 that the part of frame part 20a and 20b formed about this supporting surface 60 dropped on, valve can cut out.Baffle plate 57 forms cross shapes, gripping part 61 chuckings that form with the part of frame part 20a and 20b up and down.
Under the state that baffle plate 57 and gripping part 61 tighten, fluid can discharge to go out with circulation path 40a and 40b one effluent to the 1st and the 2nd shown in the arrow P of Figure 11 A from pump chamber 30a and 30b by the valve opening 62 shown in Figure 11 B.When valve body 56 is opened, because baffle plate 57 powerful and gripping part 61 collisions, thereby be easy to generate noise.In addition, in Figure 12 A, under valve body 56 and valve seat part 59 state of contact, pump chamber 30a and 30b and the 1st and the 2nd circulation path of discharging with circulation path 40a and 40b are cut off.At this moment, in the circulation path of fluid, produces the reverse fluid shown in the dotted arrow Q of Figure 12 A owing to moving of valve body 56 mobile, then when valve cuts out, along the direction of dotted arrow Q mobile fluid and valve collision, the high hydrodynamic pressure part of instantaneous generation is easy to generate above-mentioned such water hammer in narrow circulation path.
Embodiment 1
Below, referring to figs. 1 through Fig. 4, the desirable embodiment of the method for driving of the electromagnetic pump that adopts in order to improve the above-mentioned problem that produces along with the switching of valve is described.Fig. 1 is to the voltage waveform that Figure 4 shows that the two ends that are added in each electromagnetic coil 50a and 50b.In addition, driving voltage (pulsed voltage) to each electromagnetic coil 50a and 50b is to utilize not shown Drive and Control Circuit to generate, for example can generate dc pulse voltage, perhaps also AC supply voltage can be carried out generating dc pulse voltage after the rectification from DC electrical source voltage.
The driving that Figure 1 shows that each electromagnetic coil 50a and 50b has the incline section that is connected in linearity between positive side and the minus side at least with the voltage change of the pulsed voltage that applies when the pole reversal of the pulsed voltage that positive side and minus side alternately apply.Figure 2 shows that the pulsed voltage that applies copying exponential function to the upper limit that applies voltage and the smooth variation of lower limit between positive side and minus side.By like this, because the excitation direction of each electromagnetic coil 50a and 50b is not sharply oppositely, therefore make the travelling speed of movable piece 10 unhappy, can reduce the rapid pressure oscillation of pump chamber 30a and 30b, can reduce the vibration of the cylinder body wall that the drastic change owing to the power of the internal surface that acts on pump chamber causes, the stator vibration that causes owing to the drastic change of the electromagnetic force of electromagnetic coil 50a that acts on stator side and 50b also can reduce.In addition, can reduce the adverse current of fluid when suction valve or expulsion valve are closed, relax water hammer, can reduce noise or generation of vibration.For example, utilize the noise figure of the method for driving generation of Fig. 2 to be 28dB, can be lower than noise figure (33dB) in the past.
Pulsed voltage that Fig. 3 applies, the switching part of the excitation direction between positive side and minus side reduces the inclination of part at least in pulsed voltage, by relax the pressure oscillation of pump chamber 30a and 30b so at least when valve opens and closes.The pulsed voltage that Fig. 4 applied is except the pulse shape of Fig. 3, and the switching part of excitation direction is added the part that linear difference tilts, and is the rapid pressure oscillation that more can relax pump chamber 30a and 30b.By like this, can reduce the vibration of the cylinder body wall that the drastic change owing to the power of the internal surface that acts on pump chamber causes, the stator vibration that causes owing to the drastic change of the electromagnetic force of electromagnetic coil 50a that acts on stator side and 50b also can reduce.
Embodiment 2
Below, other example of the method for driving of electromagnetic pump is described with reference to Fig. 5 and Fig. 6.Fig. 5 and Figure 6 shows that the voltage waveform at the two ends that are added in each electromagnetic coil 50a and 50b or the current waveform of each electromagnetic coil 50a and 50b flow through.The driving that Figure 5 shows that each electromagnetic coil 50a and the 50b pulsed voltage of the sine wave shape that is applied.By applying the pulsed voltage of sine wave shape, thereby the voltage change when relaxing the pole reversal makes the travelling speed of movable body 10 unhappy, can reduce the rapid pressure oscillation of pump chamber 30a and 30b.By like this, can reduce the vibration of the cylinder body wall that the drastic change owing to the power of the internal surface that acts on pump chamber causes, the stator vibration that causes owing to the drastic change of the electromagnetic force of electromagnetic coil 50a that acts on stator side and 50b also can reduce.For example, the noise figure that utilizes the method for driving of Fig. 5 to produce is 26dB, more can reduce than the method for driving of Fig. 2.
In addition, among Fig. 6, be Vmax if establish the maximum value of the driving voltage V (t) that each electromagnetic coil 50a and 50b are applied, then expression applies the driving voltage V (t) in the scope that provides according to following formula (1).
(0.8Vmaxsin ω t)＜V (t)＜1.5Vmaxsin (ω t) ... formula (1)
(t: time, ω: angular velocity)
In the oscillogram of Fig. 6, dotted line A represents 0.8Vmaxsin (ω t), and dotted line B represents 1.0Vmaxsin (ω t), and dotted line C represents 1.5Vmaxsin (ω t).Solid line waveform is a driving voltage waveform.That is, be formed on continually varying waveform in sinusoidal wave dotted line A and the dotted line C institute area surrounded.Because Vmax is the maximum value of sine voltage, so actual upper bound is in the scope of ± 1.0Vmax.Like this, by applying sinuous pulsed voltage, thereby the voltage change when relaxing the pole reversal makes the travelling speed of movable body 10 unhappy, can reduce the rapid pressure oscillation of pump chamber 30a and 30b.In addition, if the voltage waveform that adopts sinusoidal wave head to be crushed.In addition, if the voltage waveform that adopts sinusoidal wave head to be crushed then both can suppress maximum voltage, can improve the pump delivery efficiency again.
In addition, what Fig. 5 and Fig. 6 illustrated is voltage waveform control, but also can detect the electric current that passes through among each electromagnetic coil 50a and the 50b, the electric control that works of going forward side by side makes electric current when the pole reversal of current waveform change the impulsive current that has incline section continuous between positive side and minus side at least and flows through.In addition, the control of also can switching on makes that sinuous impulsive current flows through among each electromagnetic coil 50a and the 50b.Have again, in Fig. 6,, then also can use galvanization I (t) in the scope that provides according to following formula (2) control of switching on if the maximum value of establishing the electrical current I (t) that flows through each electromagnetic coil 50a and 50b is Imax.
(0.8Imaxsin ω t)＜I (t)＜1.5Imaxsin (ω t) ... formula (2)
(t: time, ω: angular velocity)
Embodiment 3
Below, with reference to Fig. 7 to Fig. 9, other example of the method for driving of electromagnetic pump is described.Fig. 7 flows through to the current waveform of the voltage waveform that Figure 9 shows that the two ends that are added in each electromagnetic coil 50a and 50b or each electromagnetic coil 50a and 50b.
Fig. 7 and Figure 8 shows that and apply pulsed voltage or impulsive current flows through, when the pole reversal of the driving voltage of each electromagnetic coil 50a and 50b or electrical current, have voltage or current value and be zero during.Fig. 8 changes the incline section that LINEAR CONTINUOUS is set for the electric current and voltage in the front and back that become no-voltage or zero current.By like this, the speed the when valve that can slow down opens and closes reduces adverse current, relaxes water hammer, can reduce noise or generation of vibration.For example, the noise figure that utilizes the method for driving of Fig. 7 to produce is 23dB, more can reduce than the method for driving of Fig. 5.
Figure 9 shows that each electromagnetic coil 50a and 50b applies pulsed voltage or impulsive current flows through, voltage or electric current be zero during before make and apply 30% small pulsed voltage that perhaps 30% small impulsive current more than or equal to lowest high-current value Imax flows through more than or equal to maximum voltage value Vmax.In Fig. 9, since voltage or current value be zero during before, utilize with just now the voltage or the small pulsed voltage or the electric current of current reversal and carry out excitation, therefore for example the 1st expulsion valve and the 2nd suction valve begin to close, when valve cuts out fully, do not carry out excitation.By like this, can shorten during the no excitation, the reduction of pump efficiency can reduce.
Embodiment 4
Below, other example of the method for driving of electromagnetic pump is described with reference to Figure 10.Figure 10 shows that the voltage waveform at the two ends that are added in each electromagnetic coil 50a and 50b or the current waveform of each electromagnetic coil 50a and 50b flow through.
Figure 10 shows that the pulsed voltage that applies or impulsive current flow through, when the pole reversal of the driving voltage of each electromagnetic coil 50a and 50b or electrical current, make to apply and flow through smaller or equal to 30% bias voltage of maximum voltage value or smaller or equal to 30% bias current of lowest high-current value.Utilize this bias voltage or bias current, carry out weak excitation along the direction opposite with just now voltage or sense of current, thereby at the maximum voltage Vmax that adds the pole reversal or before flowing through the maximum current Imax of the pole reversal, the speed that the valve that can slow down opens and closes, reduce adverse current, relax water hammer, can reduce noise or vibration.In addition, even under the state of no excitation, also attractive effect between the outer yoke 52 of the magnetic 12 of movable piece 10 and stator side produces thrusts to movable body 10.By adjusting bias voltage or bias current, carry out weak excitation in the opposite direction along side with the thrust that acts on movable body 10, thereby also can abirritation in the influence of the thrust of this movable body 10.
In Figure 10, before also can be during applying that bias voltage or bias current flow through, apply 30% small pulsed voltage more than or equal to maximum voltage value, perhaps 30% small impulsive current more than or equal to lowest high-current value flows through (with reference to the dot and dash line of Figure 10).In this case, except the influence of abirritation, can also except the mobile terminal point of movable piece 10, not reduce travelling speed in addition and move in the thrust of movable body 10.
In addition, in the example of electromagnetic pump shown in Figure 1, a side that is arranged on movable piece 10 is communicated with 38b with circulation path 38a with the suction of opposite side, a side that is arranged on movable piece 10 is communicated with 40b with circulation path 40a with the discharge of opposite side, be that what is called makes circulation path connection in parallel, use but also a plurality of electromagnetic pumps series connection can be communicated with circulation paths.In this case, use circulation path 40a and to suck and be communicated with, perhaps will discharge and use circulation path 40b to be communicated with circulation path 38a, get final product with suction with flow path 38b as long as will discharge.In addition, be that a plurality of pump chamber 30a and 30b are provided with suction valve 34a and 34b and expulsion valve 36a and 36b respectively, but also can be the electromagnetic pump that pump chamber and suction valve and expulsion valve are set at a place.
Claims (3)
1. the method for driving of an electromagnetic pump, described electromagnetic pump is placed the movable body with permanent magnet in cylinder body, by switching on to embedding this cylinder body hollow electromagnetic coil on every side with switching the energising direction, make movable body in cylinder body along axial direction reciprocating action, the pump chamber conveyance fluid that forms in the cylinder body, it is characterized in that
Flow through impulsive current, when the pole reversal of the electrical current of described electromagnetic coil, make that earlier 30% small impulsive current more than or equal to the lowest high-current value of reverse side flows through, current value be set then be zero during.
2. the method for driving of an electromagnetic pump, described electromagnetic pump is placed the movable body with permanent magnet in cylinder body, by switching on to embedding this cylinder body hollow electromagnetic coil on every side with switching the energising direction, make movable body in cylinder body along axial direction reciprocating action, the pump chamber conveyance fluid that forms in the cylinder body, it is characterized in that
Flow through impulsive current, when the pole reversal of the electrical current of described electromagnetic coil, be arranged so that 30% bias current smaller or equal to the lowest high-current value of reverse side flows through during.
3. the method for driving of electromagnetic pump as claimed in claim 2 is characterized in that,
Before described bias current flows through, make that 30% small impulsive current more than or equal to lowest high-current value flows through.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP318331/2003 | 2003-09-10 | ||
| JP2003318331A JP2005083309A (en) | 2003-09-10 | 2003-09-10 | Driving method for electromagnetic pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1867773A CN1867773A (en) | 2006-11-22 |
| CN100567731C true CN100567731C (en) | 2009-12-09 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004800297934A Expired - Fee Related CN100567731C (en) | 2003-09-10 | 2004-09-06 | The method for driving of electromagnetic pump |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20070025861A1 (en) |
| JP (1) | JP2005083309A (en) |
| CN (1) | CN100567731C (en) |
| WO (1) | WO2005026545A1 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100040490A1 (en) * | 2008-08-12 | 2010-02-18 | Anis Rahman | Volumetric Infusion Pump and Method |
| DE102009019450A1 (en) * | 2009-04-29 | 2010-11-11 | Webasto Ag | Method for operating and device with a metering pump |
| DE102010014106B4 (en) * | 2010-04-07 | 2012-03-15 | Webasto Ag | Method for operating a metering pump and device with a metering pump |
| CA2790907C (en) | 2011-09-26 | 2018-11-27 | Lennox Industries Inc. | A controller, method of operating a water source heat pump and a water source heat pump |
| CA2790732C (en) | 2011-09-26 | 2020-03-10 | Lennox Industries Inc. | Multi-staged water manifold system for a water source heat pump |
| DE102016115300B4 (en) * | 2016-08-17 | 2019-03-07 | Gkn Automotive Ltd. | Actuator arrangement for actuating an actuating unit in a motor vehicle and coupling arrangement with such an actuator arrangement |
| DE102018222731A1 (en) * | 2018-12-21 | 2020-06-25 | Robert Bosch Gmbh | Method of operating a pump and system with such a pump |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5394131A (en) * | 1989-12-22 | 1995-02-28 | Cornelius Lungu | Magnetic drive with a permanent-magnet armature |
| US5472323A (en) * | 1993-01-07 | 1995-12-05 | Tdk Corporation | Movable magnet type pump |
| CN1131729A (en) * | 1994-11-16 | 1996-09-25 | 大宇电子株式会社 | Actuating plunger of electromagnetic pump |
| JP3363931B2 (en) * | 1993-01-07 | 2003-01-08 | ティーディーケイ株式会社 | Moving magnet pump |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5415504A (en) * | 1977-06-10 | 1979-02-05 | Daisan Kogyo | Solenoid plunger pump |
| JPS5485404U (en) * | 1977-11-30 | 1979-06-16 | ||
| JPS59147886A (en) * | 1983-02-09 | 1984-08-24 | Nippon Denso Co Ltd | Vibration type air compressor |
| NZ213490A (en) * | 1985-09-16 | 1990-03-27 | Fisher & Paykel | Cyclic motor reversal by forced commutation |
| NZ222499A (en) * | 1987-11-10 | 1990-08-28 | Nz Government | Fuel injector pump: flow rate controlled by controlling relative phase of reciprocating piston pumps |
| JPH0227168A (en) * | 1988-07-18 | 1990-01-29 | Hitachi Ltd | Quantitative pump |
| US5672950A (en) * | 1994-08-16 | 1997-09-30 | Itt Corporation | Voltage, phase and frequency control by miniature inverter system |
| JPH09126147A (en) * | 1995-10-30 | 1997-05-13 | Sanyo Electric Co Ltd | Drive device for linear compressor |
| JP3954669B2 (en) * | 1996-06-06 | 2007-08-08 | 松下冷機株式会社 | Vibration type compressor |
| US6679105B1 (en) * | 2001-09-19 | 2004-01-20 | Sandia Corporation | Oscillatory erosion and transport flume with superimposed unidirectional flow |
-
2003
- 2003-09-10 JP JP2003318331A patent/JP2005083309A/en active Pending
-
2004
- 2004-09-06 WO PCT/JP2004/012931 patent/WO2005026545A1/en active Application Filing
- 2004-09-06 CN CNB2004800297934A patent/CN100567731C/en not_active Expired - Fee Related
- 2004-09-06 US US10/571,140 patent/US20070025861A1/en not_active Abandoned
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5394131A (en) * | 1989-12-22 | 1995-02-28 | Cornelius Lungu | Magnetic drive with a permanent-magnet armature |
| US5472323A (en) * | 1993-01-07 | 1995-12-05 | Tdk Corporation | Movable magnet type pump |
| JP3363931B2 (en) * | 1993-01-07 | 2003-01-08 | ティーディーケイ株式会社 | Moving magnet pump |
| CN1131729A (en) * | 1994-11-16 | 1996-09-25 | 大宇电子株式会社 | Actuating plunger of electromagnetic pump |
Also Published As
| Publication number | Publication date |
|---|---|
| US20070025861A1 (en) | 2007-02-01 |
| CN1867773A (en) | 2006-11-22 |
| WO2005026545A1 (en) | 2005-03-24 |
| JP2005083309A (en) | 2005-03-31 |
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