WO2005026545A1 - 電磁式ポンプの駆動方法 - Google Patents
電磁式ポンプの駆動方法 Download PDFInfo
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- WO2005026545A1 WO2005026545A1 PCT/JP2004/012931 JP2004012931W WO2005026545A1 WO 2005026545 A1 WO2005026545 A1 WO 2005026545A1 JP 2004012931 W JP2004012931 W JP 2004012931W WO 2005026545 A1 WO2005026545 A1 WO 2005026545A1
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- WIPO (PCT)
- Prior art keywords
- voltage
- electromagnetic
- cylinder
- current
- driving
- Prior art date
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Classifications
-
- 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
Definitions
- the present invention relates to a method for driving an electromagnetic pump, and more particularly, to a method for driving an electromagnetic pump used for transporting a fluid such as a gas or a liquid.
- the applicant of the present application first accommodates a mover made of a magnetic material in a cylinder on the stator side in a reciprocating manner, and energizes a single-phase electromagnetic coil fitted around the cylinder to thereby make it movable.
- a single-phase electromagnetic coil fitted around the cylinder to thereby make it movable.
- an external force is applied to one of the pump chambers to suck the fluid through the first valve and to the outside through the second valve.
- the electromagnetic coil When the electromagnetic coil is energized, the mover moves in the axial direction of the cylinder as a reaction to the magnetic field force applied to the electromagnetic coil by the electromagnetic force (see Patent Document 1).
- Patent Document 1 Japanese Patent Application No. 2002-286188 As a method of driving the electromagnetic pump, a square wave voltage as shown in FIG. 14 is applied to both ends of the electromagnetic coil to switch the direction of current flow through the electromagnetic coil. There is a method of driving the mover.
- FIG. 14 shows the relationship between the opening / closing operation of the first suction valve and the first discharge valve provided in the pump chamber, the opening / closing operation of the second suction valve and the second discharge valve, and the drive voltage. For example, when a positive side square wave drive voltage is applied to the electromagnetic coil, the first suction valve of the pump chamber opens, and then the first discharge valve closes to allow fluid to flow into the pump chamber.
- the second discharge valve opens, and then the second suction valve closes, causing fluid to flow out of the pump chamber.
- the first discharge valve of the pump chamber opens, and then the first suction valve closes, causing the fluid to flow out of the pump chamber.
- the second suction valve opens, and then the second discharge valve closes, allowing fluid to flow into the pump chamber.
- first suction valve and the second discharge valve or the first discharge valve and the second suction valve are opened, the first suction valve and the second suction valve vigorously abut against the locking surface of the frame portion forming the pump chamber to be locked. In addition, noise and vibration are generated at the same time. Furthermore, the first suction and discharge valves and the second suction and discharge valves are opened and closed by the pressure change in the pump chamber due to the movement of the mover. Closed force Opened force rather than open When closing, fluid temporarily flows in the opposite direction to the previous flow direction, so the valve closes with a slight delay in timing.
- a water hammer phenomenon occurs in which the fluid flowing in the opposite direction collides with the valve and instantaneously generates a high fluid pressure portion in a narrow flow passage. Noise and vibration are generated by this water hammer phenomenon.
- a noise value of 33dB was detected in the driving method applying a square wave driving voltage shown in Fig. 14, a noise value of 33dB was detected.
- the present invention has been made to solve these problems, and an object of the present invention is to provide an electromagnetic pump that reduces noise and vibration caused by sudden pressure fluctuations in the pump chamber when driving the electromagnetic pump. It is to provide a driving method.
- the present invention has the following configuration to achieve the above object.
- a mover with a permanent magnet is housed in the cylinder, and the mover is reciprocated in the axial direction within the cylinder by energizing an air-core electromagnetic coil fitted around the cylinder to form the mover in the cylinder.
- the voltage change when the polarity of the pulse voltage applied alternately on the positive side and the negative side for driving the electromagnetic coil is reversed.
- a pulse voltage having a continuous slope at least between the positive side and the negative side is applied.
- Another method is to detect the current flowing through the electromagnetic coil and detect the current change when the polarity of the current is reversed.
- the pulse current has a continuous gradient at least between the positive side and the negative side. It is characterized by.
- the polarity of the drive voltage or the conduction current of the electromagnetic coil is reversed.
- a pulse voltage having a period during which the voltage or current value becomes zero is applied or a pulse current flows.
- an offset voltage of 30% or less of the maximum voltage value or the maximum current value is applied or the offset current flows so that the offset current flows. It is characterized in that a loose voltage is applied or a pulse current flows.
- the voltage change when the polarity of the pulse voltage alternately applied on the positive side and the negative side for driving the electromagnetic coil is reversed is at least between the positive side and the negative side.
- the current change is at least a gradient between the positive side and the negative side. Since the energization control is performed so that a pulse current having the following flows, the excitation direction of the electromagnetic coil does not suddenly reverse.
- the moving speed of the mover can be reduced to reduce the sudden pressure fluctuation in the pump chamber, and the vibration on the cylinder wall due to the sudden fluctuation of the force acting on the inner surface of the pump chamber can be reduced.
- the vibration of the stator due to the sudden fluctuation of the electromagnetic force acting on the electromagnetic coil on the stator side can be reduced.
- the backflow when the suction or discharge valve of the fluid is closed can be reduced to mitigate the water hammer phenomenon, and the generation of noise and vibration can be reduced.
- an offset voltage of 30% or less of the maximum voltage value or the maximum current value is applied in advance, or a pulse voltage having a period during which the offset current flows is applied. Even if an applied or pulsed current flows, the backflow of the pump chamber fluid is reduced by reducing the closing speed of the suction or discharge valve of the pump chamber before the maximum voltage with inverted polarity is applied or the maximum current flows. As a result, the water hammer phenomenon can be reduced, and the generation of noise and vibration can be reduced.
- the thrust acting on the mover in the non-excited state The bias can be mitigated by adjusting the offset voltage or the offset current and performing weak excitation in a direction opposite to the direction of the thrust acting on the mover.
- a minimum pulse voltage or a minute pulse voltage of 30% or more of the maximum current value is applied before the period during which the voltage or current value becomes zero, or before applying the offset voltage or before the period during which the offset current flows.
- the excitation time for weakening the immediately preceding excitation state of the electromagnetic coil can be reduced by reducing the current or the minute pulse current, so that the pump efficiency can be reduced.
- FIG. 1 is a drive voltage waveform diagram of an electromagnetic pump according to a first embodiment.
- FIG. 2 is a drive voltage waveform diagram of the electromagnetic pump according to the first embodiment.
- FIG. 3 is a drive voltage waveform diagram of the electromagnetic pump according to the first embodiment.
- FIG. 4 is a drive voltage waveform diagram of the electromagnetic pump according to the first embodiment.
- FIG. 5 is a waveform diagram of a drive voltage or an energizing current of the electromagnetic pump according to the second embodiment.
- FIG. 6 is a waveform diagram of a drive voltage or an energizing current of the electromagnetic pump according to the second embodiment.
- FIG. 7 is a waveform diagram of a drive voltage or a conduction current of the electromagnetic pump according to the third embodiment.
- FIG. 8 is a waveform diagram of a drive voltage or an energizing current of the electromagnetic pump according to the third embodiment.
- FIG. 9 is a waveform diagram of a drive voltage or an energizing current of an electromagnetic pump according to a third embodiment, and a timing chart showing an open / closed state of a suction valve and a discharge valve.
- FIG. 10 is a waveform diagram of a drive voltage or an energizing current of the electromagnetic pump according to the fourth embodiment.
- FIG. 11A and FIG. 11B are explanatory diagrams showing a fully opened state of a discharge valve.
- FIG. 12A and FIG. 12B are explanatory diagrams showing a fully closed state of the discharge valve.
- FIG. 13 is a cross-sectional view showing the entire configuration of the electromagnetic pump.
- FIG. 14 is a waveform diagram of a drive voltage of a conventional electromagnetic pump and a timing chart showing an open / closed state of a suction valve and a discharge valve.
- the electromagnetic pump according to the present embodiment accommodates a mover having a permanent magnet in a cylinder, and is fitted around the cylinder.
- the present invention can be widely applied to electromagnetic pumps in which a movable element is reciprocated in an axial direction within a cylinder by energizing an air-core electromagnetic coil so as to transport fluid from a pump chamber formed in the cylinder.
- the mover 10 is housed in a closed cylinder and provided so as to be able to reciprocate in the axial direction of the cylinder.
- the mover 10 includes a disk-shaped magnet 12 and a pair of inner yokes 14a and 14b that sandwich the magnet 12 in the thickness direction.
- the magnet 12 is a permanent magnet that is magnetized in the thickness direction (vertical direction in FIG. 13) with one surface being an N pole and the other surface being an S pole.
- the inner yokes 14a and 14b are made of a magnetic material, and each of the inner yokes 14a and 14b has a flat plate portion 15a having a slightly larger diameter than the magnet 12, and a short tube standing on the periphery of the flat plate portion 15a. And a flange portion 15b.
- the outer peripheral surface of the flange portion 15b becomes a magnetic flux acting surface on the mover 10 side of the magnetic flux generated from the magnet 12.
- the sealing material 16 is a non-magnetic material such as plastic that covers the outer peripheral side surface of the magnet 12.
- the sealing material 16 has a function of covering the magnet 12 so as not to be exposed to the outside so that the magnet 12 does not expand, and a function of integrally forming the magnet 12 and the inner yokes 14a and 14b.
- the sealing material 16 is a force provided so as to fill the outer peripheral side surface of the magnet 12 sandwiched between the inner yokes 14a and 14b.
- the outer diameter of the sealing material 16 is slightly smaller than the outer diameter of the inner yokes 14a and 14b. It is formed.
- a cylindrical cylinder is formed by combining the upper frame body 20a and the lower frame body 20b, which also include a pair of non-magnetic materials, in which the above-described mover 10 is housed in a reciprocating manner.
- a cylinder part 24 formed in a cylindrical shape on the frame body 22b of the lower frame body 20b is formed in a body.
- a sealing material 29 is provided at a position where the end face of the cylinder portion 24 of the fitting groove 28 contacts, and the inside of the cylinder is sealed from the outside by abutting the end face of the cylinder portion 24 against the sealing material 29.
- the cylinder 24 extends from the upper frame 20a and fits into the lower frame 20b. It can also be done. Further, the cylinder portion 24 may be formed separately from the upper frame body 20a and the lower frame body 20b.
- both end surfaces of the cylinder are closed by the upper frame body 20a and the lower frame body 20b, and the pump chambers 30a, 30b are respectively provided between both side surfaces in the moving direction of the mover 10 and the inner wall surfaces of the upper and lower frame bodies 20a, 20b. 30b force S formed.
- the pump chambers 30a and 30b correspond to gaps formed between the end faces of the mover 10 and the frame body 22a of the upper frame 20a and the frame body 22b of the lower frame 20b.
- the mover 10 slides in a state in which the mover 10 is in air-tight or liquid-tight seal with the cylinder portion 24 while in contact with the inner surface of the cylinder portion 24.
- the outer peripheral surfaces of the inner yokes 14a and 14b have both a lubricating property and a protective effect such as DLC (diamond 'like' carbon) coating. Apply the coating obtained.
- a detent for preventing the mover 10 from rotating in the circumferential direction.
- Dampers 32 are attached to the end faces (inner wall surfaces) of the frame bodies 22a and 22b.
- the damper 32 is provided to absorb an impact when the inner yokes 14a, 14b come into contact with the end surfaces of the frame bodies 22a, 22b.
- the damper 32 may be provided on an end face of the frame bodies 22a, 22b, an end face of the inner yokes 14a, 14b, and a face abutting on the frame bodies 22a, 22b.
- a first suction valve 34a and a first discharge valve 36a are provided in communication with the pump chamber 30a.
- a second suction valve 34b and a second discharge valve 36b are provided in communication with the pump chamber 30b.
- the upper frame 20a and the lower frame 20b are provided with suction channels 38a and 38b communicating with the suction valves 34a and 34b.
- the upper frame 20a and the lower frame 20b are provided with discharge flow paths 40a, 40b communicating with the first and second discharge valves 36a, 36b.
- the suction flow path 38a of the upper frame 20a and the suction flow path 38b of the lower frame 20b are connected by a communication pipe 42, and are connected to the discharge flow path 40a of the upper frame 20a and the discharge flow path 40b of the lower frame 20b.
- a communication pipe 44 are connected by a communication pipe 44.
- air-core electromagnetic coils 50a and 50b are fitted around the cylinder.
- the electromagnetic coils 50a and 50b are slightly spaced apart in the axial direction of the cylinder, and are arranged at an equal position with respect to the center position in the axial direction of the cylinder.
- the axial length of the electromagnetic coils 50a and 50b is set longer than the movable range of the flange portion 15b of the inner yokes 14a and 14b.
- the winding directions of the electromagnetic coil 50a and the electromagnetic coil 50b are opposite to each other, and are set so that currents flowing in opposite directions flow when energized by the same power supply.
- the outer yoke 52 is provided in a cylindrical shape so as to surround the outer periphery of the electromagnetic coils 50a and 50b.
- the outer yoke 52 is made of a magnetic material, and is provided to increase the number of magnetic fluxes linked to the electromagnetic coils 50a and 50b to effectively apply an electromagnetic force to the mover 10.
- the flange 15b is provided in the periphery of the inner yokes 14a and 14b constituting the movable element 10 so as to be erected in the axial direction, the magnetic flux generated from the magnet 12 is transferred from the inner yokes 14a and 14b to the outer yoke 52a. , The magnetic resistance of the magnetic circuit can be reduced.
- the total amount of magnetic flux acting from the mover 10 is increased (a magnetic path is secured), and the magnetic flux generated by the magnet 12 is perpendicular to the current flowing through the electromagnetic coils 50a and 50b with respect to the axial direction.
- axial thrust can be effectively generated on the mover 10 by interlinking.
- the mass of the mover 10 according to this configuration is lighter than the generated thrust, a high-speed response is possible and the output flow rate can be increased.
- the electromagnetic coils 50a, 50b and the outer yoke 52 are formed by fitting the outer yoke 52 into the fitting grooves 28 provided in the upper frame 20a and the lower frame 20b when the upper frame 20a and the lower frame 20b are combined. Can be assembled concentrically with part 24.
- the mover 10 is reciprocally driven (moves up and down) by the action of the electromagnetic force generated by the electromagnetic coils 50a and 50b by applying an alternating current to the electromagnetic coils 50a and 50b.
- the electromagnetic coils 50a and 50b are controlled by a control unit (not shown). By controlling the energizing time and energizing direction, the mover 10 can be reciprocally driven with an appropriate stroke.
- the damper 32 absorbs an impact when the mover 10 comes into contact with the inner surfaces of the frame bodies 22a and 22b.
- the pumping action of the electromagnetic pump of the present embodiment is performed by reciprocating the mover 10 by the electromagnetic coils 50a and 50b, whereby fluid is alternately sucked into the pump chambers 30a and 30b and discharged. That is, when the mover 10 moves downward in the state of FIG. 13, a fluid is introduced into one pump chamber 30a, and at the same time, a fluid is discharged from the other pump chamber 30b. Conversely, when the mover 10 moves upward, fluid is discharged from one pump chamber 30a and fluid is introduced into the other pump chamber 30b. Thus, when the mover 10 moves to either side, the fluid is sucked and discharged, the pulsation of the fluid is suppressed, and the fluid can be transported efficiently.
- the electromagnetic pump of the present embodiment can be used for transporting gas or liquid, and the type of fluid is not limited.
- a liquid pump if the transport pressure is insufficient with a single mover 10, a multi-stage type unit in which a plurality of unit movers of the same shape consisting of a magnet 12 and inner yokes 14a and 14b are connected.
- the mover 10 may be used. By connecting the unit movers in multiple stages, a mover having a large thrust can be obtained, and an electromagnetic pump having a required transport pressure can be obtained.
- FIG. 11 shows the discharge valve 55 in a fully open state
- FIG. 12 shows the discharge valve 55 in a fully closed state.
- the discharge valve 55 opens and closes a flow path between the pump chambers 30a, 30b and the first and second discharge flow paths 40a, 40b.
- a valve body 56 disposed on the first and second discharge passages 40a and 40b side and a stopper 57 disposed on the pump chambers 30a and 30b side are integrally connected by a valve shaft 58. Have been.
- the discharge valve 55 moves in the valve axis direction due to the pressure change in the pump chambers 30a and 30b due to the movement of the mover 10 described above.
- the valve body 56 has a seating surface (tapered surface) 60 which can be closed by closing on a valve seat portion 59 formed on a part of the upper and lower frame portions 20a and 20b.
- the stopper 57 is formed in a cross shape, and is locked by a locking portion 61 formed on a part of the upper and lower frame portions 20a and 20b. When the stopper 57 is locked to the locking portion 61, the fluid flows from the pump chambers 30a and 30b through the valve holes 62 shown in FIG. 11B from the pump chambers 30a and 30b as indicated by arrows P in FIG. 11A.
- FIGS. 1 to 4 show voltage waveforms applied to both ends of each of the electromagnetic coils 50a and 50b.
- the drive voltage (pulse voltage) to each of the electromagnetic coils 50a and 50b is generated by a drive control circuit (not shown).
- a DC pulse voltage may be generated from a DC power supply voltage, or the AC power supply voltage may be rectified. It is permissible to generate a DC pulse voltage afterwards.
- Figure 1 shows that when the polarity of the pulse voltage applied alternately on the positive and negative sides for driving each of the electromagnetic coils 50a and 50b is reversed, the voltage change is at least linear between the positive and negative sides. This indicates that a pulse voltage having a continuously continuous slope is applied.
- FIG. 2 shows that a pulse voltage that smoothly changes to the upper and lower limits of the applied voltage between the positive side and the negative side according to an exponential function is applied.
- the exciting direction of each of the electromagnetic coils 50a and 50b does not suddenly reverse, so that the moving speed of the mover 10 is slowed down, so that sudden pressure fluctuations in the pump chambers 30a and 30b can be reduced, and the force acting on the inner surface of the pump chambers
- the vibration of the cylinder wall due to the rapid fluctuation of the stator can be reduced, and the vibration of the stator due to the rapid fluctuation of the electromagnetic force acting on the electromagnetic coils 50a and 50b on the stator side can also be reduced.
- the backflow when the suction or discharge valve of the fluid is closed can be reduced to mitigate the water hammer phenomenon, thereby reducing the generation of noise and vibration.
- the noise value by the driving method in Fig. 2 was 28dB, which was reduced compared to the conventional (33dB).
- Fig. 3 shows the inclination of the switching part of the excitation direction between at least the positive side and the negative side of the pulse voltage.
- a pulse voltage partially reduced in pressure By applying a pulse voltage partially reduced in pressure, at least the pressure fluctuations in the pump chambers 30a and 30b when the valve opens and closes are reduced.
- FIG. 4 shows that, in addition to the pulse waveform of FIG. 3, a pulse voltage having a linearly different slope of the excitation direction switching section is applied so as to further reduce sudden pressure fluctuations in the pump chambers 30a and 30b. It was done.
- the vibration of the cylinder wall due to the rapid fluctuation of the force acting on the inner surface of the pump chamber can be reduced, and the vibration of the stator due to the rapid fluctuation of the electromagnetic force acting on the electromagnetic coils 50a and 50b on the stator side can also be reduced.
- FIGS. 5 and 6 show a voltage waveform applied to both ends of each of the electromagnetic coils 50a and 50b or a current waveform flowing through each of the electromagnetic coils 50a and 50b.
- FIG. 5 shows that a sinusoidal pulse voltage is applied for driving each of the electromagnetic coils 50a and 50b.
- the vibration of the cylinder wall due to the sudden fluctuation of the force acting on the inner surface of the pump chamber can be reduced, and the vibration of the stator due to the sudden fluctuation of the electromagnetic force acting on the electromagnetic coils 50a and 50b on the stator side is also reduced. it can.
- the noise value obtained by the driving method shown in FIG. 5 was 26 dB, which was further reduced from the driving method shown in FIG.
- FIG. 6 shows that, when the maximum value of the drive voltage V (t) applied to each of the electromagnetic coils 50a and 50b is Vmax, the drive voltage V (t) is applied within the range given by the following equation (1). It indicates that. 0.8 ⁇ Vmax 'sin (co t) ⁇ V (t) ⁇ 1.5' Vmax 'sin (co t) ... Equation (1)
- a broken line 0.8 indicates 0.8 'Vmax' sin (co t)
- a broken line 1.0 indicates 1.0 'Vmax' sin (co t)
- a broken line C indicates 1.5 'Vmax' sin (co t).
- the solid waveform is the drive voltage waveform. That is, the waveform changes continuously in the area surrounded by the dashed lines A and C, which are sine waves! / ⁇ . Since Vmax is the maximum value of the sine wave voltage, it is actually limited to a range of ⁇ 1.0 ⁇ Vmax. in this way.
- the voltage change when the polarity is reversed becomes gentle, and the moving speed of the mover 10 is slowed down, and the pump chambers 30a and 30b Pressure fluctuation can be reduced.
- the voltage waveform is such that the head of the sine wave is crushed, the pump output efficiency can be improved while suppressing the maximum voltage.
- FIGS. 5 and 6 show the voltage waveform control described above.
- the current change when the polarity of the current waveform is inverted by detecting the current flowing through each of the electromagnetic coils 50a and 50b is at least between the positive side and the negative side.
- the energization control may be performed such that a pulse current having a continuous gradient flows in the step (a).
- the current may be controlled so that a sinusoidal pulse current flows through each of the electromagnetic coils 50a and 50b.
- the maximum value of the current I (t) flowing through each of the electromagnetic coils 50a and 5 Ob is defined as Imax, the current I (t) is controlled within the range given by the following equation (2). You can do it! ⁇ .
- FIGS. 7 to 9 show voltage waveforms applied to both ends of each of the electromagnetic coils 50a and 50b or current waveforms flowing through each of the electromagnetic coils 50a and 50b.
- Figures 7 and 8 show that when the polarity of the drive voltage or current flowing through each of the electromagnetic coils 50a and 50b is reversed, a pulse voltage having a period during which the voltage or current value becomes zero is applied or the pulse current is Indicates flowing.
- FIG. 8 shows that a voltage current change before and after the voltage becomes zero voltage or zero current has a linearly continuous slope.
- the noise value obtained by the driving method shown in FIG. 7 was 23 dB, which was further reduced from the driving method shown in FIG.
- Figure 9 shows that each electromagnetic coil 50a is set so that a minute pulse voltage of 30% or more of the maximum voltage value Vmax or the maximum current value Imax is applied or a minute pulse current flows before the voltage or current becomes zero.
- 50b indicates that a pulse voltage is applied or a pulse current flows.
- the excitation is performed by the minute pulse voltage or current in the opposite direction to the immediately preceding voltage or current, so that, for example, the first discharge valve and the De-energize when the suction valve 2 starts to close and the valve closes completely. This Thereby, the non-excitation period can be shortened, and a decrease in pump efficiency can be reduced.
- FIG. 10 shows a voltage waveform applied to both ends of each of the electromagnetic coils 50a and 50b or a current waveform flowing through each of the electromagnetic coils 50a and 5Ob.
- Fig. 10 shows that when the polarity of the drive voltage or current flowing through each of the electromagnetic coils 50a and 50b is reversed, a pulse is applied so that the maximum voltage or an offset voltage of 30% or less of the maximum current is applied or the offset current flows. Indicates that voltage is applied or pulse current flows.
- an attractive force acts between the magnet 12 of the mover 10 and the outer yoke 52 on the stator side, so that a thrust is generated on the mover 10.
- the effect of the thrust acting on the mover 10 can be reduced by adjusting the offset voltage or offset current and performing weak excitation in the direction opposite to the direction of the thrust acting on the mover 10. .
- a minute pulse voltage of 30% or more of the maximum voltage value or the maximum current value may be applied or a minute pulse current may flow (see FIG. 10). 10 dashed line). In this case, besides mitigating the effect of the thrust acting on the mover 10, the mover 10 can be moved without lowering its moving speed excluding the end of movement.
- the electromagnetic pump shown in FIG. 1 communicates with suction passages 38a and 38b provided on one side and the other side of the mover 10, and discharges the gas on the one side and the other side of the mover 10.
- a plurality of electromagnetic pumps can be used in serial communication with the flow paths.
- the force for communicating the discharge channel 40a with the suction channel 38b and the discharge channel 40b may be connected with the suction channel 38a.
- a plurality of pump chambers 30a and 30b were provided with suction valves 34a and 34b and discharge valves 36a and 36b, respectively. It may be an electromagnetic pump provided with a single valve.
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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
Description
Claims
Priority Applications (1)
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US10/571,140 US20070025861A1 (en) | 2003-09-10 | 2004-09-06 | Electromagnetic pump driving method |
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JP2003-318331 | 2003-09-10 | ||
JP2003318331A JP2005083309A (ja) | 2003-09-10 | 2003-09-10 | 電磁式ポンプの駆動方法 |
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JP (1) | JP2005083309A (ja) |
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US20100040490A1 (en) * | 2008-08-12 | 2010-02-18 | Anis Rahman | Volumetric Infusion Pump and Method |
DE102009019450A1 (de) * | 2009-04-29 | 2010-11-11 | Webasto Ag | Verfahren zum Betreiben und Vorrichtung mit einer Dosierpumpe |
DE102010014106B4 (de) * | 2010-04-07 | 2012-03-15 | Webasto Ag | Verfahren zum Betreiben einer Dosierpumpe und Vorrichtung mit einer Dosierpumpe |
CA2790732C (en) | 2011-09-26 | 2020-03-10 | Lennox Industries Inc. | Multi-staged water manifold system for a water source heat 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 |
DE102016115300B4 (de) * | 2016-08-17 | 2019-03-07 | Gkn Automotive Ltd. | Aktuatoranordnung zum Betätigen einer Stelleinheit in einem Kraftfahrzeug und Kupplungsanordnung mit einer solchen Aktuatoranordnung |
DE102018222731A1 (de) * | 2018-12-21 | 2020-06-25 | Robert Bosch Gmbh | Verfahren zum Betreiben einer Pumpe und System mit einer solchen Pumpe |
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JPS5415504A (en) * | 1977-06-10 | 1979-02-05 | Daisan Kogyo | Solenoid plunger pump |
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 |
DE3942542A1 (de) * | 1989-12-22 | 1991-06-27 | Lungu Cornelius | Bistabiler magnetantrieb mit permanentmagnetischem hubanker |
EP0605903B1 (en) * | 1993-01-07 | 1997-06-11 | TDK Corporation | Movable magnet type pump |
US5672950A (en) * | 1994-08-16 | 1997-09-30 | Itt Corporation | Voltage, phase and frequency control by miniature inverter system |
KR0134002B1 (ko) * | 1994-11-16 | 1998-04-28 | 배순훈 | 압력형 전자펌프의 플런저 |
JP3954669B2 (ja) * | 1996-06-06 | 2007-08-08 | 松下冷機株式会社 | 振動型圧縮機 |
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/ja active Pending
-
2004
- 2004-09-06 US US10/571,140 patent/US20070025861A1/en not_active Abandoned
- 2004-09-06 WO PCT/JP2004/012931 patent/WO2005026545A1/ja active Application Filing
- 2004-09-06 CN CNB2004800297934A patent/CN100567731C/zh not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5485404U (ja) * | 1977-11-30 | 1979-06-16 | ||
JPH0331913B2 (ja) * | 1983-02-09 | 1991-05-09 | Nippon Denso Co | |
JPH0227168A (ja) * | 1988-07-18 | 1990-01-29 | Hitachi Ltd | 定量ポンプ |
JP3363931B2 (ja) * | 1993-01-07 | 2003-01-08 | ティーディーケイ株式会社 | 可動磁石式ポンプ |
JPH09126147A (ja) * | 1995-10-30 | 1997-05-13 | Sanyo Electric Co Ltd | リニアコンプレッサの駆動装置 |
Also Published As
Publication number | Publication date |
---|---|
US20070025861A1 (en) | 2007-02-01 |
CN100567731C (zh) | 2009-12-09 |
JP2005083309A (ja) | 2005-03-31 |
CN1867773A (zh) | 2006-11-22 |
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