WO2008026661A1 - Dispositif de commande de pompe volumétrique alternative, dispositif électrique utilisant celui-ci, système de pile à combustible et procédé de commande de pompe volumétrique alternative - Google Patents

Dispositif de commande de pompe volumétrique alternative, dispositif électrique utilisant celui-ci, système de pile à combustible et procédé de commande de pompe volumétrique alternative Download PDF

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Publication number
WO2008026661A1
WO2008026661A1 PCT/JP2007/066812 JP2007066812W WO2008026661A1 WO 2008026661 A1 WO2008026661 A1 WO 2008026661A1 JP 2007066812 W JP2007066812 W JP 2007066812W WO 2008026661 A1 WO2008026661 A1 WO 2008026661A1
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WIPO (PCT)
Prior art keywords
frequency
duty ratio
pulse signal
reciprocating pump
flow rate
Prior art date
Application number
PCT/JP2007/066812
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English (en)
Japanese (ja)
Inventor
Akinori Yukimasa
Masataka Ozeki
Hideo Ohara
Akinari Nakamura
Original Assignee
Panasonic Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Panasonic Corporation filed Critical Panasonic Corporation
Publication of WO2008026661A1 publication Critical patent/WO2008026661A1/fr

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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
    • F04B17/042—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors using solenoids the solenoid motor being separated from the fluid flow
    • F04B17/044—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors using solenoids the solenoid motor being separated from the fluid flow using solenoids directly actuating the piston
    • 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
    • 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
    • F04B2201/00—Pump parameters
    • F04B2201/02—Piston parameters
    • F04B2201/0206—Length of piston stroke
    • 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
    • F04B2203/0401—Current
    • 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
    • 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
    • F04B2203/0404—Frequency of the electric current

Definitions

  • Reciprocating pump control device electric device using the same, fuel cell system, and reciprocating pump control method
  • the present invention relates to a reciprocating pump control device, an electric device using the same, a fuel cell system, a reciprocating pump control method, and the like.
  • a conventional fuel cell system includes a hydrogen generator that generates a hydrogen-containing gas by a steam reforming reaction using a raw material containing at least carbon and hydrogen, such as methane, city gas, and methanol, and steam, and the hydrogen generator And a fuel cell that generates electricity using hydrogen-containing gas and oxidant gas supplied from
  • the water for water vapor is generally supplied using a reciprocating pump exemplified by a plunger pump or the like (see, for example, Patent Document 1).
  • FIG. 1 is a schematic view showing an operation of taking a fluid into a reciprocating pump casing.
  • FIG. 2 is a schematic view showing the operation of pushing out the fluid from the inside of the back and forth pump housing.
  • the same number is assigned to the same configuration.
  • a reciprocating pump housing 1 in a reciprocating pump housing 1, there are a moving body 2, a suction side valve 4, and a discharge side valve 5 having magnetism.
  • the moving body 2 moves upward in the figure with the suction side valve 4 opened and the discharge side valve 5 closed, the fluid 3 enters the reciprocating pump housing 1 from the suction side.
  • 10 is a spring
  • 11 is an electromagnetic coil for energization (for example, refer patent document 2).
  • Patent Document 2 Registered Utility Model No. 3090496
  • the fuel cell system can be used as a hydrogen generator in a startup process, a stop process, and a power generation process.
  • the required flow rate of water is different, and the required flow rate of water varies depending on the amount of power generation in the power generation process, so the range of flow rate required for the fuel cell system is very wide.
  • the range is significantly higher than the controllable flow range when using only the frequency of the drive power pulse signal of the reciprocating pump.
  • the present invention takes into consideration the problems of such a conventional reciprocating pump, and a reciprocating pump control device capable of controlling the reciprocating pump in a wide flow rate range, an electric device using the reciprocating pump, a fuel cell system, and An object is to provide a reciprocating pump control method.
  • the first aspect of the present invention provides:
  • a reciprocating pump control device for controlling an operation of a reciprocating pump having a moving body and reciprocating the moving body by a driving power pulse signal to supply a fluid
  • the frequency of the driving power pulse signal When controlling the flow rate of the fluid, the frequency of the driving power pulse signal, at least the duty ratio of the driving power pulse signal, the voltage value or current value of the driving power pulse signal, and the driving power pulse It is a reciprocating pump controller that controls at least one of the signal time constants.
  • the second aspect of the present invention provides:
  • the control target is a frequency of the driving power pulse signal and a duty ratio of the driving power pulse signal.
  • the third aspect of the present invention provides When the flow rate is controlled by controlling the frequency of the driving power pulse signal having the first duty ratio, if the frequency is equal to or higher than the upper limit frequency set for the first duty ratio,
  • the reciprocating pump control device controls the frequency by changing to a driving power pulse signal having a second duty ratio larger than the first duty ratio.
  • the fourth aspect of the present invention provides
  • the driving power pulse signal having the second duty ratio is changed and the frequency is decreased below the upper limit frequency.
  • 3 is a reciprocating pump control device of the present invention.
  • the fifth aspect of the present invention provides
  • the reciprocating pump control device controls the frequency by changing to a driving power pulse signal having a second duty ratio larger than the first duty ratio.
  • the sixth aspect of the present invention provides
  • the drive power pulse signal having the second duty ratio is changed to a frequency higher than the frequency corresponding to the upper limit flow rate.
  • 5 is a reciprocating pump control device according to the fifth aspect of the present invention.
  • the seventh aspect of the present invention provides:
  • FIG. 8 is a reciprocating pump control device according to a seventh aspect of the present invention.
  • the ninth aspect of the present invention provides:
  • the reciprocating pump control device When the flow rate is controlled by controlling the frequency of the drive power pulse signal having the second duty ratio, if the frequency is equal to or lower than the lower limit flow rate set for the second duty ratio, The reciprocating pump control device according to the second or fifth aspect of the present invention, wherein the frequency is controlled by changing to a driving power noise signal having a first duty ratio smaller than the second duty ratio.
  • the driving power pulse signal having the first duty ratio is changed to a frequency higher than the frequency corresponding to the lower limit flow rate.
  • 9 is a reciprocating pump control device according to the ninth aspect of the present invention.
  • a reciprocating pump control device according to a third aspect of the present invention, wherein the flow rate is greater than a flow rate converted from the lower limit frequency serving as a reference when changing to a duty ratio of 1 and the second duty ratio.
  • the lower limit of the frequency set with respect to the second duty ratio If the flow rate is less than or equal to the flow rate, the frequency is controlled by changing to a drive power pulse signal having a first duty ratio smaller than the second duty ratio,
  • the upper limit flow rate serving as a reference when changing from the first duty ratio to the second duty ratio is the lower limit serving as a reference when changing from the second duty ratio to the first duty ratio.
  • the reciprocating pump control device according to the fifth aspect of the present invention is larger than the flow rate.
  • the control target is a frequency of the driving power pulse signal and a voltage value or a current value of the driving power pulse signal.
  • the frequency is the first voltage value or the first current. If the frequency exceeds the upper limit frequency set for the value, the driving voltage is changed to a driving power pulse signal having a second voltage value or a second current value larger than the first voltage value or the first current value.
  • a thirteenth reciprocating pump control device for controlling a frequency.
  • the driving power pulse signal having the second voltage value or the second current value 14 is a reciprocating pump control device according to the fourteenth aspect of the present invention, wherein the reciprocating pump control device reduces the frequency to a value lower than the upper limit frequency.
  • the frequency is the second voltage value or the second current value. If the frequency falls below the lower limit frequency set for the current value, the frequency is changed by changing to the driving power pulse signal having the first voltage value or the first current value smaller than the second duty ratio.
  • a thirteenth reciprocating pump control device according to the present invention for controlling.
  • the seventeenth aspect of the present invention provides
  • the lower limit frequency at which the frequency is set with respect to the second voltage value or the second current value When the number is less than or equal to the number, the driving power pulse signal having the first voltage value or the first current value is changed, and the reciprocating motion according to the sixteenth present invention increases the frequency above the lower limit frequency. It is a pump control device.
  • the control target is a frequency of the driving power pulse signal and a time constant of the driving power pulse signal.
  • the reciprocating pump control device is configured to control the frequency by changing to a drive electric signal having a second time constant larger than the first time constant.
  • the twentieth aspect of the present invention provides
  • the driving power pulse signal having the second time constant is changed and the frequency is decreased from the upper limit frequency.
  • 19 is a reciprocating pump control device according to the present invention.
  • the frequency of the driving power pulse signal having the second time constant is controlled to control the flow rate
  • the frequency is equal to or lower than the lower limit frequency set for the second time constant.
  • a reciprocating pump control device according to an eighteenth aspect of the present invention, wherein the frequency is controlled by changing to the driving power pulse signal having the second time constant.
  • the twenty-second aspect of the present invention provides
  • a reciprocating pump control device When the frequency is equal to or lower than a lower limit frequency set for the second time constant, the driving power pulse signal having the first time constant is changed, and the frequency is increased from the lower limit frequency.
  • a reciprocating pump having a moving body and reciprocating the moving body by a drive power pulse signal to supply a fluid;
  • An electric apparatus comprising the reciprocating pump control device according to any one of the first to twenty-second aspects of the present invention and operating by receiving a supply of fluid from the reciprocating pump.
  • a reciprocating pump having a moving body and reciprocating the moving body by a drive power pulse signal to supply water;
  • a reciprocating pump control device according to any one of the first to 22nd aspects of the present invention
  • a hydrogen generator that generates a hydrogen-containing gas from the raw material and water supplied from the reciprocating pump;
  • a fuel cell system comprising: a fuel cell that generates power using a hydrogen-containing gas delivered from the hydrogen generator.
  • the twenty-fifth aspect of the present invention provides
  • a reciprocating pump housing a moving body that reciprocates in the reciprocating pump housing, a suction side valve, a discharge side valve, a panel that urges the moving body, and an electromagnetic that moves the moving body.
  • a reciprocating pump for supplying a fluid by reciprocating the moving body by driving the electromagnetic coil based on a driving electric cannula signal, and in the flow rate control, The frequency of the drive power pulse signal and at least one of the duty ratio of the drive power pulse signal, the voltage value or the current value of the drive power pulse signal, and the time constant of the drive power pulse signal are controlled. This is a reciprocating pump control method that controls the flow rate.
  • a control method for a reciprocating pump according to a 25th aspect of the present invention wherein the controlled object is a frequency of the drive power pulse signal and a duty ratio of the drive power pulse signal.
  • a control method for a reciprocating pump according to a twenty-sixth aspect of the present invention wherein the frequency is controlled by changing to a driving power noise signal having a second duty ratio larger than the first duty ratio.
  • a control method for a reciprocating pump according to a twenty-sixth aspect of the present invention wherein the frequency is controlled by changing to a driving power pulse signal having a second duty ratio larger than the first duty ratio.
  • the 29th aspect of the present invention provides
  • a control method for a reciprocating pump according to a 26th or 27th aspect of the present invention wherein the frequency is controlled by changing to a driving electric chan- nel signal having a first duty ratio smaller than a second duty ratio.
  • a control method for a reciprocating pump according to the twenty-sixth or twenty-eighth aspects of the present invention, wherein the frequency is controlled by changing to a driving electric chan- nel signal having a first duty ratio smaller than a second duty ratio.
  • the thirty-first aspect of the present invention is
  • control target is the frequency of the driving power pulse signal, the duty ratio of the driving power pulse signal, and the voltage value or current value of the driving power pulse signal. It is.
  • the thirty-second aspect of the present invention provides
  • the frequency is equal to or higher than the first upper limit frequency set for the first duty ratio.
  • a thirty-second reciprocating pump control device according to the thirty-second aspect of the present invention, wherein the frequency and voltage value or current value are controlled by changing to a driving power pulse signal having a duty ratio.
  • the frequency When the frequency is equal to or higher than the second upper limit frequency set with respect to the first duty ratio, the frequency is changed to a driving power pulse signal having the second duty ratio and the frequency is changed to the second duty ratio.
  • a reciprocating pump control device according to the thirty-third aspect of the present invention, wherein the voltage value or current value is returned to the voltage value or current value before the increase.
  • the thirty-fifth aspect of the present invention provides
  • control of the reciprocating pump according to the 25th aspect of the present invention wherein the control object is the frequency of the drive power pulse signal, the duty ratio of the drive power pulse signal, and the voltage value or current value of the drive power pulse signal. Is the method.
  • the frequency is equal to or higher than the first upper limit frequency set for the first duty ratio.
  • the thirty-seventh aspect of the present invention provides
  • a control method for a reciprocating pump according to a thirty-sixth aspect of the present invention wherein the frequency and voltage value or current level are controlled by changing to a driving power pulse signal having a duty ratio.
  • the thirty-eighth aspect of the present invention provides When the frequency is equal to or higher than the second upper limit frequency set with respect to the first duty ratio, the frequency is changed to a driving power pulse signal having the second duty ratio and the frequency is changed to the second duty ratio.
  • the control method for a reciprocating pump according to the thirty-seventh aspect of the present invention wherein the control is performed so that the voltage value or current value is returned to the voltage value or current value before the increase.
  • the thirty-ninth aspect of the present invention provides
  • the driving power pulse signal is a control method for a reciprocating pump according to any one of the 25th to 30th and 35th to 38th aspects of the present invention, wherein the driving power pulse signal is a rectangular wave signal, a sine wave signal, a triangular wave signal, or a trapezoidal wave signal. .
  • the reciprocating pump control device of the present invention has the advantage that the reciprocating pump can be controlled over a wide flow rate range.
  • the electrical device of the present invention can control the reciprocating pump in a wide flow rate range by using the above-described reciprocating pump control device, and thus can exhibit excellent performance.
  • FIG. 1 Schematic showing the operation of taking fluid into the reciprocating pump housing
  • FIG. 2 Schematic showing the operation of pushing out the fluid from the reciprocating pump housing
  • FIG. 3 is a diagram comparing a high duty ratio signal and a low duty ratio signal in the driving power pulse signal of the same frequency in the embodiment of the present invention.
  • the reciprocating pump control device determines the position of the top dead center of the moving body when the reciprocating pump is driven at a high duty ratio and when it is driven at a low duty ratio.
  • FIG. 5 is a diagram showing a flow rate control method for a reciprocating pump according to an embodiment of the present invention.
  • FIG. 6 is a diagram showing a flow rate control method for a reciprocating pump according to another embodiment of the present invention.
  • 7] A diagram for explaining the flow rate fluctuation state when the reciprocating pump in the embodiment of the present invention deteriorates with time.
  • FIG. 9 A diagram for explaining a flow rate control method of a reciprocating pump for controlling the frequency and voltage value of a driving power pulse signal in a reciprocating pump control device according to a modification of the embodiment of the present invention.
  • FIG. 10 (a) (b) Diagrams for explaining the influence of the time constant on the flow rate in the drive signal power noise signal of the same frequency in the modification of the embodiment of the present invention.
  • FIG. 11 A diagram for explaining a flow rate control method of a reciprocating pump for controlling the frequency and time constant of a driving power pulse signal in a reciprocating pump control device according to a modification of the embodiment of the present invention.
  • FIG. 12 A diagram for explaining a flow rate control method for a reciprocating pump that controls the frequency, duty ratio, and voltage value of a driving power pulse signal in a reciprocating pump control device according to a modification of the embodiment of the present invention.
  • FIG. 13 A diagram for explaining a flow rate control method for a reciprocating pump that controls the frequency, duty ratio, and voltage value of a driving power pulse signal in a reciprocating pump control device according to a modification of the embodiment of the present invention.
  • FIGS. 15A and 15B are diagrams for explaining the influence on the flow rate when the frequency is increased in the operation at a low duty ratio of the reciprocating pump according to another embodiment of the present invention.
  • FIG. 16] (a) and (b) are diagrams for explaining the influence on the flow rate when the frequency is increased in the operation at a high duty ratio of the reciprocating pump of another embodiment of the present invention.
  • FIG. 17 A diagram for explaining a flow rate control method for a reciprocating pump according to another embodiment of the present invention.
  • Fig. 3 is a diagram comparing a high duty ratio signal and a low duty ratio signal in a drive electric chan- nel signal of the same frequency.
  • FIG. 4 is a schematic diagram comparing the position of the top dead center of the moving body 2 when the high duty ratio drive is input and when the low duty ratio drive is input in the reciprocating pump according to the present embodiment.
  • the reciprocating pump control device 12 of the present invention is a control unit that controls both the frequency of the driving power pulse signal and the duty ratio of the driving power pulse signal during flow rate control. Is a semiconductor memory that stores data indicating the relationship between the frequency of the driving power pulse signal, the duty ratio of the driving power pulse signal, and the flow rate, which are determined in advance through experiments and the like!
  • top dead center 7 of the moving body 2 when driven at a high duty ratio is higher than the top dead center 6 of the moving body 2 when driven at the tee ratio.
  • the reason why the top dead center changes is as follows.
  • the electromagnetic coil 11 installed around the moving body 2 is energized and controlled to move the magnetic moving body 2.
  • the drive power pulse signal is OFF, the energization of the electromagnetic coil 11 is stopped, and the moving body 2 is returned to the original position only by the repulsive force of the spring 10.
  • the moving body 2 is moved by turning on and off the drive power pulse signal. For this reason, if the ON time is long, the time during which the force is applied from the electromagnetic coil 11 to the moving body 2 becomes long, so that the height of the top dead center increases. Conversely, if the ON time is short, the height of the top dead center will decrease.
  • the flow rate of the fluid entering the reciprocating pump housing is larger when driving at a high duty ratio than at a low duty ratio.
  • changing the height of the top dead center of the moving body 2 changes the flow rate of the fluid that the reciprocating pump sucks and discharges, even if the frequency of the drive electric signal input to the reciprocating pump is the same.
  • FIG. 5 is a diagram showing a flow rate control method for the reciprocating pump according to Embodiment 1 of the present invention.
  • the duty ratios a, b, c, and d in the figure are in a relationship of a ⁇ b ⁇ c ⁇ d.
  • the relationship between the frequency of each flow-rate drive power signal and the duty ratio a, b, c, d of each drive power pulse signal of the reciprocating pump is experimentally grasped beforehand.
  • flow control of the reciprocating pump is performed by increasing or decreasing the frequency of the drive power pulse signal.
  • the relationship between the frequency of the drive power pulse signal of the reciprocating pump at a certain duty ratio a and the discharge flow rate is shown in FIG.
  • Increasing the frequency of the drive power pulse signal increases the fluid discharge flow rate of the pump.
  • the frequency of the driving power pulse signal is limited by the mechanical restrictions or durability of the reciprocating pump, or has a preferable range of a to /3.Therefore, the frequency of the driving power pulse signal at the duty ratio a is the upper limit value /
  • the duty ratio power of the drive electric signal is changed to further increase the fluid discharge rate. It is.
  • the frequency of the drive power noise signal is set. Control is performed so as to decrease.
  • the discharge flow rate of the reciprocating pump is set to the drive power having the duty ratio a and the upper limit frequency A. Control is performed so that the frequency C becomes equal to the flow rate LL when the reciprocating pump is operated by the cannulus signal.
  • the value of the frequency C of the drive power cannulus signal at this time is determined based on the relationship of the frequency of the flow drive power pulse signal obtained experimentally in advance at the duty ratio b. These values are stored as data in the storage memory 13! /
  • the frequency of the drive power pulse signal at the duty ratios a and b is within a limited range derived from the mechanical or durability of the reciprocating pump, or within a preferable frequency range, ⁇ to / 3. It ’s done.
  • the discharge flow rate of the reciprocating pump is controlled by increasing the frequency of the driving electric chan- nel signal, and the frequency force of the driving electric cannula signal is set for the predetermined duty ratio.
  • control is performed so as to increase the duty ratio of the drive power pulse signal and simultaneously reduce the frequency of the drive power pulse signal.
  • the pump discharge flow rate decreases.
  • the frequency of the drive power pulse signal when operating at a duty ratio d with a duty ratio of the drive power pulse signal and reducing the fluid discharge flow rate, when the frequency of the drive power pulse signal at the duty ratio d reaches a certain lower limit frequency B Then, the duty ratio of the driving power signal is changed to c. At the same time, the flow rate can be prevented from abruptly changing by increasing the frequency of the drive power signal.
  • the discharge flow rate of the reciprocating pump is driven at the lower limit frequency B with the duty ratio d as shown in FIG.
  • Control is performed to reduce the frequency D to be equal to the flow rate when the reciprocating pump is operated by the power pulse signal.
  • the frequency of the drive power canonical signal is determined based on the relationship between the frequency of the flow drive power pulse signal obtained experimentally in advance.
  • the discharge flow rate of the reciprocating pump is used to reduce the frequency of the drive power pulse signal.
  • V the duty ratio of the driving power signal is lowered when the frequency of the driving power signal reaches the lower limit frequency, and at the same time the frequency of the driving power signal is increased.
  • the fluid discharge flow rate of the reciprocating pump is wide as shown in Fig. 5. It can be changed in range and range.
  • the fluid discharge flow rate of the reciprocating pump is limited to the range of L to H.
  • the fluid discharge flow range of the reciprocating pump can be expanded by controlling both the frequency of the driving power pulse signal and the duty ratio of the driving power pulse signal.
  • the duty ratio may be changed by focusing on threshold values such as an upper limit flow rate and a lower limit flow rate instead of focusing on the upper limit frequency and the lower limit frequency.
  • the reciprocating pump control device controls the frequency of the drive power noise signal having the first duty ratio (for example, the duty ratio a in FIG. 5) to control the flow rate of the fluid from the reciprocating pump.
  • the first duty ratio greater than the first duty ratio is controlled.
  • the frequency is controlled by changing to a driving electric signal having a duty ratio of 2 (for example, duty ratio b in FIG. 5).
  • the reciprocating pump control device sets the second duty ratio (for example, The driving power pulse signal having a duty ratio b) is changed to a frequency lower than the frequency corresponding to the upper limit flow rate (eg, flow rate LL).
  • the reciprocating pump control device controls the flow rate of the fluid from the reciprocating pump by controlling the frequency of the driving power pulse signal having the second duty ratio (for example, duty ratio b). If the frequency falls below the lower limit flow rate set for the second duty ratio (for example, duty ratio b) (for example, the flow rate LL in FIG. 5), the second duty ratio The frequency is controlled by changing to a drive power noise signal having a first duty ratio (for example, duty ratio a in FIG. 5) smaller than the ratio (for example, duty ratio b).
  • a first duty ratio for example, duty ratio a in FIG. 5
  • the reciprocating pump control device performs the first duty ratio (for example, Then, the drive power noise signal having the duty ratio a) in FIG. 5 is changed, and the frequency is increased from the frequency corresponding to the lower limit flow rate.
  • the second duty ratio for example, duty ratio b
  • the reciprocating pump control device performs the first duty ratio (for example, Then, the drive power noise signal having the duty ratio a) in FIG. 5 is changed, and the frequency is increased from the frequency corresponding to the lower limit flow rate.
  • the flow rate force converted from the upper limit frequency A and the duty ratio a used as a reference when the duty ratio a is changed to a higher duty ratio b In the process of decreasing the flow rate of the reciprocating pump, the lower limit frequency E at the duty ratio b is set so as to be larger than the flow rate converted from the lower limit frequency and the duty ratio b, which is the reference when changing from the duty ratio to the duty ratio a. Is set.
  • the reciprocating pump control device in the present embodiment changes from a low duty ratio (for example, duty ratio a) to a high duty ratio (for example, duty ratio b) in the process of increasing the flow rate of the reciprocating pump.
  • a low duty ratio for example, duty ratio a
  • a high duty ratio for example, duty ratio b
  • a low duty ratio for example, duty ratio a
  • a low duty ratio for example, duty ratio a
  • the duty ratio and frequency are controlled according to the increase / decrease of the flow rate so that it is larger than the flow rate LLD.
  • the frequency threshold value of the driving power pulse signal differs when the duty ratio of the driving power pulse signal is changed between when the flow rate is increased and when the flow rate is decreased.
  • the flow rate control is performed near the upper limit flow rate LLU, once it is changed to the duty ratio b and frequency C in the process of increase, how many small increases / decreases are performed near that point.
  • the frequency of the drive power pulse signal only fluctuates in the vicinity of frequency C on the duty ratio b.
  • FIG. 7 shows a case where there is no difference in the frequency threshold of the driving power pulse signal when the duty ratio of the driving power pulse signal is changed between when the flow rate is increased and when the flow rate is decreased ( 6 is a graph of the state described in FIG. In FIG. 7, the duty ratios a and b before deterioration of the reciprocating pump are indicated by solid lines, and the duty ratios a and after deterioration are indicated by alternate long and short dash lines. If the reciprocating pump deteriorates over time and the sealing performance becomes poor due to wear of the O-ring, etc., the flow rate will decrease even when operated at the same duty ratio.
  • Fig. 8 shows the case where a difference is made in the threshold value of the frequency of the drive power pulse signal when the duty ratio of the drive power pulse signal is changed between when the flow rate is increased and when the flow rate is decreased (Fig. 8).
  • 6 is a graph of the state described in 6).
  • the duty ratios a and b before deterioration of the reciprocating pump are shown by solid lines, and the duty ratios a and b after deterioration are shown by dotted lines. .
  • the flow rate will change from LL3 to LL2 when the duty ratio is increased from a to b. Also, when decreasing the flow rate, when the frequency reaches LL4 with the duty ratio b, the duty ratio is changed from 3 ⁇ 4 to a and the frequency is increased from E to F, and the flow rate from LL4. It will change to LL5.
  • the duty ratio of the drive power pulse signal is changed depending on whether the duty ratio is changed or the flow rate is changed.
  • the frequency of the drive power pulse signal only fluctuates in the vicinity of frequency C on the duty ratio b.
  • the reciprocating pump can be controlled over a wide flow range by controlling the frequency and duty ratio of the drive power pulse signal.
  • the drive power pulse signal It may be realized by controlling the frequency and the voltage value or current value, or may be realized by controlling the frequency and time constant of the drive power noise signal. This will be further described below with reference to the drawings.
  • FIG. 9 is a graph showing a case where the reciprocating pump is controlled using the frequency and voltage value of the drive power pulse signal.
  • the voltage values increase in the order of voltage values a, b, c, and d shown in Fig. 9. The higher the voltage value, the stronger the force that pulls up the moving body 2, so the top dead center of the moving body 2 becomes higher and the flow rate increases.
  • Fig. 9 The higher the voltage value, the stronger the force that pulls up the moving body 2, so the top dead center of the moving body 2 becomes higher and the flow rate increases.
  • the solid line represents the control when the flow rate is increased, and the dotted line represents the control when the flow rate is decreased.
  • the reciprocating pump control device drives when the frequency of the driving power noise signal is equal to or higher than the upper limit frequency (for example, the upper limit frequency A) in the process of increasing the flow rate of the reciprocating pump.
  • the voltage value of the power pulse signal is changed from a low voltage value (for example, voltage value a) to a high voltage value (for example, voltage value b).
  • control is performed so as to reduce the frequency of the drive electric cannula signal.
  • the present embodiment as shown in FIG.
  • the reciprocating pump is controlled by the driving electric chan- nel signal with the voltage value b!
  • the voltage value of the drive power pulse signal is changed from a high voltage value (for example, voltage value b) to a low voltage value (for example, voltage value a).
  • control is performed so as to increase the frequency of the drive power no-load signal.
  • the driving power pulse signal having the voltage value b and the lower limit frequency E is used. Is controlled so as to decrease to a frequency G equal to the discharge flow rate LL8 when the reciprocating pump is operated.
  • Figures 10 (a) and (b) show the drive power noise signal. And the actual voltage change due to the drive power pulse signal.
  • the driving power pulse signal is indicated by a one-dot chain line, and the actual voltage change is indicated by a solid line. As shown in FIG. 10, the rise of the actual voltage is delayed by the influence of the time constant of the circuit of the control device 12 and the electromagnetic coil 11 or the like.
  • FIG. 11 is a graph showing a case where the reciprocating pump is controlled using the frequency and time constant of the driving power pulse signal.
  • the time constant As described above, the smaller the time constant is, the higher the top dead center of the moving body 2 is, so the flow rate increases. Therefore, the time constants become smaller in the order of time constants a, b, c, and d shown in Fig. 11.
  • the same control as in Fig. 6 above can be performed to make it possible to control the reciprocating pump over a wide flow rate range.
  • the solid line represents the control when the flow rate is increased
  • the dotted line represents the control when the flow rate is decreased.
  • the reciprocating pump control device drives when the frequency of the driving power noise signal is equal to or higher than the upper limit frequency (for example, the upper limit frequency A) in the process of increasing the flow rate of the reciprocating pump.
  • the voltage value of the power pulse signal is changed from a high time constant (for example, time constant a) to a low time constant (for example, time constant b).
  • time constant a for example, time constant a
  • time constant b for example, time constant b
  • the reciprocating motion is generated by the driving power cannulus signal of frequency A with the time constant a. Control is performed to reduce the frequency to C, which is equal to the discharge flow rate LL1 when the pump is operated.
  • the reciprocating pump is controlled by the driving electric chan- nel signal with a time constant b! /, And the driving electric chan- If the frequency is lower than the lower limit frequency (for example, lower limit frequency E), the time constant of the drive power pulse signal is changed from the low time constant (for example, time constant b) to the high time constant (for example, time constant a).
  • control is performed so as to increase the frequency of the drive power no-relay signal.
  • the time constant of the driving power pulse signal when changing the time constant of the driving power pulse signal to the time constant a as shown in FIG. 9, it is reciprocated by the driving power pulse signal with the time constant b and the lower limit frequency E. Control is performed so that the discharge flow rate when the dynamic pump is operated is decreased to a frequency G that is equal to LL8.
  • the force S illustrated in the case of any one of a duty ratio, a voltage value, a current value, and a time constant as a control parameter of the driving power noise signal controlled along with the frequency Two parameters selected from the duty ratio, voltage value, current value, and time constant may be used as the control parameters of the drive electric chan- nel signal controlled along with the frequency.
  • the frequency of the drive power pulse signal, the duty ratio, and the voltage value may be controlled. Specifically, as shown in FIG.
  • the duty ratio and the voltage value are alternately changed.
  • the frequency power of the driving power noise signal as shown in Fig. 13 exceeds the predetermined upper limit frequency, or when the predetermined lower limit frequency is reached, the duty ratio and voltage value are changed simultaneously, etc.
  • the combination of the two control parameters of the dynamic power pulse signal controlled other than the frequency is not limited to this example, and other combinations may be used. Further, when controlling the discharge flow rate of the reciprocating pump, the duty ratio, voltage value, and time constant, or the duty ratio, current value, and time constant may be controlled together with the frequency.
  • the threshold value for changing at least one of the duty ratio, voltage value, current value, and time constant is also used.
  • the discharge flow rate (upper limit flow rate or lower limit flow rate) of the reciprocating pump may be used instead of the frequency of the drive power panelless signal.
  • the reciprocating pump is controlled using the frequency of the driving power pulse signal, the duty ratio of the driving power pulse signal, and the voltage value of the driving power cannula signal. Precise flow rate control is possible.
  • FIG. 14 is a graph showing the relationship between the duty ratio, frequency, and flow rate. Forces not shown in FIGS. 5, 6, 9, and 11 for simplicity of explanation As shown in FIG. 14, at each duty ratio, the flow rate tends to decrease as the frequency increases.
  • FIG. 15 (a) is a diagram showing the relationship between the driving power pulse signal and the operating position of the moving body 2 when the reciprocating pump is controlled at a low frequency with a low duty ratio.
  • FIG. 15 (b) is a diagram showing the driving power pulse signal and the operating position of the moving body 2 when the reciprocating pump is controlled at a high frequency at a low duty ratio.
  • the dotted line indicates the drive power pulse signal
  • the solid line indicates the position of the moving body 2.
  • the position of the moving body 2 in (a) is indicated by a one-dot chain line.
  • FIG. 16 (a) is a diagram showing the driving power pulse signal and the operating position of the moving body 2 when the reciprocating pump is controlled at a low frequency with a high duty ratio.
  • FIG. 16 (a) shows a state in which the moving body 2 is lowered to the position of DO in the reciprocating pump housing 1 during the off time.
  • FIG. 16 (b) is a diagram showing the driving power pulse signal and the operating position of the moving body 2 when the reciprocating pump is controlled at a high frequency with a high duty ratio.
  • the dotted line indicates the drive power noise signal
  • the solid line indicates the operation of the mobile unit 2.
  • the flow rate increases to a predetermined amount.
  • the flow rate tends to decrease.
  • an upper limit frequency r in the duty ratio a is set as shown in FIG. Further, the upper limit frequency at the duty ratio b is set to p, and the upper limit frequency force at the duty ratio c is set. These frequencies r, p, and q are set to frequencies lower than the flow rate decreases at each duty ratio.
  • the maximum flow rate at the duty ratio a is LLa, and the frequency at that time is fl.
  • the frequency is increased at the duty ratio a with the voltage value fixed, and the frequency force is exceeded.
  • the voltage value of the drive power pulse signal is increased and the frequency is increased without changing the duty ratio.
  • the maximum flow rate at the duty ratio a can be increased from LLa, and the frequency at the maximum flow rate is higher than fl. You can do it.
  • the frequency of the driving power pulse signal is set from ⁇ to / 3 as a limitation due to mechanical restrictions or durability of the reciprocating pump or a preferable range. Therefore, when the frequency reaches / 3, which is an example of the second upper limit frequency of the present invention, at the duty ratio a, the duty ratio is changed from a to b, the frequency is decreased from / 3 to t, and the voltage value Control is performed to return to the value before increasing.
  • the frequency t is a frequency at the duty ratio b that can maintain the same flow rate as the flow rate at the frequency / 3 of the duty ratio a when the voltage is increased. If the flow rate at frequency r is LL6 and the flow rate at frequency / 3 is LL7, the flow from LL6 to LL7 is controlled between frequency and ⁇ at duty ratio a.
  • the frequency force ⁇ is reached at the duty ratio a
  • the voltage is not increased and the duty ratio is increased from a to b and the frequency is increased from r to s as in the first and second embodiments. If it is reduced to, the flow from LL6 to LL7 is controlled from frequency s to t.
  • the frequency width for controlling the same flow width becomes narrow. In other words, since the frequency range from / 3 is wider than the frequency range from s to t, it is possible to finely control between the flow LL6 force and LL7, enabling precise control. It can be.
  • control may be similarly performed for the force S described for the control for increasing the voltage value when the lowest duty ratio a is equal to or higher than the frequency force, and for other duty ratios.
  • the voltage value may be increased without changing the duty ratio from b to c.
  • the lower limit frequency is set to a value lower than t in the duty ratio b, and the difference between the frequency of increase and decrease is set as in Fig. 6.
  • the frequency change can be suppressed.
  • the duty ratio is changed from b to a at a higher frequency, so it is within the range where continuous frequency change can be suppressed! Is as big as possible!
  • the maximum flow rate is increased by increasing the force current that has increased the voltage value of the drive power noise signal. Control may be performed so as to shift the hour frequency to the high frequency side. Furthermore, instead of increasing the voltage value, the time constant may be reduced to increase the maximum flow rate, and control may be performed to shift the frequency at the maximum flow rate to the high frequency side.
  • a pulse signal that is a rectangular wave is used as an example of the drive power pulse signal of the present invention.
  • the present invention is not limited to this, and a sine wave signal, a triangular wave signal, or It can be a trapezoidal wave signal.
  • the upper limit frequency at each duty ratio described in FIGS. 5 and 6 is illustrated in FIG.
  • the upper limit frequency A in FIG. 6 can be set as the frequency r.
  • the fourth embodiment of the present invention is a reciprocating pump as a water supply device for hydrogen generation in a hydrogen generator in a fuel cell system as an example of the electric apparatus of the present invention.
  • This is an embodiment in which the reciprocating pump control device of the present invention described in the first, second, and third embodiments is used as a control device for controlling the reciprocating pump.
  • reference numeral 21 denotes a reformer that generates a hydrogen-containing gas by reforming a raw material of hydrocarbon components such as natural gas and LPG and steam.
  • Reference numeral 22 denotes a heater of the reformer 21, which is composed of a flame burner, and supplies heat necessary for the reforming reaction to the reforming catalyst body.
  • 23 is a raw material supplier that supplies the reformer 21 with raw materials necessary for the reforming reaction.
  • Reference numeral 24 denotes a water supply device that supplies water necessary for the reforming reaction to the reformer 21, and is composed of a reciprocating pump.
  • 25 is a transformer that shifts carbon monoxide and water in the hydrogen gas after the reformer 21.
  • Reference numeral 26 denotes an air supply unit including an air pump that supplies air, which is an oxidizing gas, to the hydrogen gas after the transformer 25.
  • 27 is a CO remover that oxidizes carbon monoxide in the hydrogen gas after the transformer 25.
  • Reference numeral 28 denotes a fuel cell using a solid polymer as an electrolyte, and a hydrogen-containing gas delivered from the hydrogen generator is supplied to the anode side of the fuel cell 28.
  • a blower 29 supplies air used for power generation to the power sword side of the fuel cell 28.
  • 210 is a heat recovery unit that recovers heat generated during power generation from the fuel cell 28, and recovers heat using cooling water.
  • Reference numeral 212 denotes a reciprocating pump control device, and reference numeral 213 denotes a structure that supplies power to the heater 22 through the exhaust hydrogen gas path of the drainage element that is not consumed by the fuel cell 28.
  • 214 is a control device that controls the entire fuel cell system, and determines the power generation amount of the fuel cell 28 based on the power demand of the load power (not shown), and further to the hydrogen generator according to this power generation amount.
  • the raw material flow rate and the water flow rate are determined, and a command is output to the reciprocating pump control device 212 so that the flow rate becomes this flow rate.
  • the flow rate of water to be supplied to the hydrogen generator is large in accordance with the variation in the amount of power generated by the fuel cell based on severe load fluctuations. Even if there is a change, the reciprocating pump control device 212 controls the operation of the reciprocating pump, which is the water supply device 24, as in the first and second embodiments described above. Is possible.
  • the duty ratio change is controlled using thresholds such as the upper limit flow rate and the lower limit flow rate as in the first and second embodiments, which are not threshold values such as the upper limit frequency and the lower limit frequency.
  • the reciprocating pump control device controls the flow rate of the fluid from the reciprocating pump by controlling the frequency of the drive power noise signal having the first duty ratio
  • the flow rate is When the flow rate exceeds the preset upper limit flow rate with respect to the first duty ratio, the frequency is controlled by changing to a driving power signal having a second duty ratio larger than the first duty ratio.
  • the reciprocating pump control device changes to the driving power noise signal having the second duty ratio, and Reduce the frequency below the frequency corresponding to the upper flow limit.
  • the reciprocating pump control device controls the flow rate of the fluid from the reciprocating pump by controlling the frequency of the driving power pulse signal having the second duty ratio, If the frequency falls below the lower limit flow rate set for the second duty ratio, the frequency is controlled by changing to the driving power pulse signal having the first duty ratio smaller than the second duty ratio. The At that time, when the flow rate is equal to or lower than the lower limit flow rate set for the second duty ratio, the reciprocating pump control device changes to the driving power pulse signal having the first duty ratio, The frequency is increased above the frequency corresponding to the lower limit flow rate.
  • the upper limit flow rate serving as a reference when changing from the first duty ratio to the second duty ratio is It is greater than the lower limit flow rate that is used as a reference when changing from the second duty ratio to the first duty ratio. This is desirable because it can prevent repeated firing.
  • the recording medium carrying the program is a recording medium storing a program for causing the computer to execute the operation of the above-described reciprocating pump control method of the present invention, and is readable by the computer.
  • the read program is a recording medium for executing the operation in cooperation with the computer.
  • one usage form of the program may be an aspect in which the program is recorded on a recording medium such as a ROM readable by a computer and operates in cooperation with the computer.
  • one usage form of the program is a mode in which the program is transmitted through a transmission medium such as the Internet or a transmission medium such as an optical 'radio wave' sound wave, read by a computer, and operates in cooperation with the computer. Even if there is good ,.
  • the computer described above is not limited to pure hardware such as a CPU, but may include firmware, an OS, and peripheral devices.
  • the configuration of the present invention may be realized in software or hardware.
  • the present invention eliminates the difference between the flow rate immediately before changing the duty ratio of the drive power pulse signal and the flow rate immediately after the change, and makes it possible to make the flow rate change continuous.
  • the present invention makes it possible to prevent repeated changes in the duty ratio of the drive power pulse signal during flow rate control and the frequency change of the drive power kanron signal associated therewith.
  • the present invention can expand the controllable flow rate range using an inexpensive pump without using an expensive pump, and thus can reduce the cost of the fuel cell cogeneration system. To do.
  • the present invention can control a reciprocating pump in a wide flow rate range, and can control the reciprocating pump in a wide flow rate range from start to stop. It is suitable for necessary electrical equipment, particularly fuel cell systems in which the amount of water supplied to the hydrogen generator varies greatly with fluctuations in power generation even during steady operation.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Control Of Positive-Displacement Pumps (AREA)

Abstract

La commande conventionnelle de l'écoulement d'un fluide utilisant une pompe volumétrique alternative pour alimenter un fluide à l'aide du mouvement alternatif d'un piston en fournissant en entrée un signal à impulsions de puissance d'excitation et en utilisant uniquement l'augmentation/la diminution de la fréquence du signal à impulsions de puissance d'excitation engendre un problème en ce que la zone d'écoulement pouvant être contrôlée est étroite. Un dispositif de commande de pompe volumétrique alternative est équipé d'un corps mobile et est utilisé pour commander le fonctionnement d'une pompe volumétrique alternative pour alimenter un fluide à l'aide du mouvement alternatif du corps mobile en utilisant un signal à impulsions de puissance d'excitation. Pour commander l'écoulement d'un fluide, la fréquence du signal à impulsions de puissance d'excitation et au moins un des facteurs de marche (a à d) du signal à impulsions de puissance d'excitation, la valeur de tension ou de courant du signal à impulsions de puissance d'excitation et la constante de temps du signal à impulsions de puissance d'excitation sont utilisés en tant qu'objets pouvant être contrôlés.
PCT/JP2007/066812 2006-08-29 2007-08-29 Dispositif de commande de pompe volumétrique alternative, dispositif électrique utilisant celui-ci, système de pile à combustible et procédé de commande de pompe volumétrique alternative WO2008026661A1 (fr)

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JP2006232310 2006-08-29

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WO2017072532A1 (fr) * 2015-10-30 2017-05-04 Aspen Pumps Limited Dispositif de commande de pompe à solénoïde
IT201800004099A1 (it) * 2018-03-29 2019-09-29 Magneti Marelli Spa Pompa a pistoni e relativo metodo di controllo
JP7525899B2 (ja) 2021-09-14 2024-07-31 ヤマト科学株式会社 Ｄｃポンプの制御装置、制御プログラムおよび制御方法

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JPS6332173A (ja) * 1986-07-25 1988-02-10 Sanyo Electric Co Ltd 電磁ポンプの制御装置
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JPS5929779A (ja) * 1982-08-11 1984-02-17 Yamatake Honeywell Co Ltd 電磁ポンプの制御方式
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WO2017072532A1 (fr) * 2015-10-30 2017-05-04 Aspen Pumps Limited Dispositif de commande de pompe à solénoïde
GB2543832B (en) * 2015-10-30 2020-03-11 Aspen Pumps Ltd Pump driver
IT201800004099A1 (it) * 2018-03-29 2019-09-29 Magneti Marelli Spa Pompa a pistoni e relativo metodo di controllo
EP3546746A1 (fr) * 2018-03-29 2019-10-02 Magneti Marelli S.p.A. Pompe à piston et procédé de commande correspondant
US20190301438A1 (en) * 2018-03-29 2019-10-03 MAGNETI MARELLI S.p.A. Piston pump and relative control method
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US10914295B2 (en) 2018-03-29 2021-02-09 Marelli Europe S.P.A. Piston pump and relative control method
JP7525899B2 (ja) 2021-09-14 2024-07-31 ヤマト科学株式会社 Ｄｃポンプの制御装置、制御プログラムおよび制御方法

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