CN101871447A

CN101871447A - Pump controller

Info

Publication number: CN101871447A
Application number: CN201010209799A
Authority: CN
Inventors: D·T·特兰; T·Q·丹; R·小纳瓦尔; D·L·菲利普斯
Original assignee: ITT Manufacturing Enterprises LLC
Current assignee: Xylem IP Holdings LLC
Priority date: 2009-04-21
Filing date: 2010-04-21
Publication date: 2010-10-27
Anticipated expiration: 2030-04-21
Also published as: JP2010255634A; EP2246569A3; CN101871447B; BRPI1002730A2; EP2246569B1; EP2246569A2; JP5479995B2; AU2010201599A1; AU2010201599B2; MX2010004368A

Abstract

The present invention provides a technique using current sensing to control the pressure at constant level without the direct sensing of the pressure. This technique will help to reduce dependency solely on switch or sensor and their non linearity and other associated problems such as the non-repetitive behavior, being affected by EMI etc. The technique includes using a pump controller featuring one or more modules configured to respond to one or more input signals containing information about current provided from a pump; and configured to provide one or more output signals containing information to control the pump to operate at a substantially constant pressure without the direct sensing of pump pressure. The one or more modules control the operation of the pump based at least partly on a table of characteristics related to voltage and current that is calibrated for each pump.

Description

Pump controller

Technical field

The present invention relates to be used for the technology of the operation of control pump, comprise provide a kind of with current of electric as sensor parameter and the method under constant compression force, moved with control pump as Control Parameter with electric moter voltage.

More particularly, the present invention relates to a kind of method and apparatus, it makes delivery pressure keep constant with pump control, and this is at least in part based on the unique algorithm of detection-sensitive motor electric current with the V-I characteristic of following the trail of pump.

Background technique

Many pumps of prior art comprise mechanical pressure switches, or semiconductor hall sensor, perhaps load cell, and the perhaps electronic pressure-sensing device of any other form, it closes this pump when surpassing certain pressure (being closing pressure).This pressure switch, Hall transducer or load cell typically are in the position with pump inner fluid physical connection.When the pressure of this fluid surpassed this closing pressure, the motivation tool switch of trying hard to recommend of this fluid disconnected the power circuit of this pump or produces corresponding electrical signal to follow the tracks of this setting pressure.Mechanical switch has certain narrow limitation.For example, in the process that repeats to disconnect with the power circuit of closed pump, Arc Discharge takes place and burn through regular meeting between the contact of switch.This pressure is because non-repetition and/or characteristic of nonlinear and can not keep constant.So, rely on this pressure switch or sensor always can provide inconsistent control ring fully.

In view of this, be necessary to improve pump controller in the art, to solve the problem relevant in known pump design with mechanical pressure switches or sensor.

Summary of the invention

In order to overcome the problems referred to above of mechanical pressure switches and pressure transducer, the invention provides a kind of not direct sensing pressure and use current sense with the new technology of pressure control in constant level.This new technology will help to reduce and only depend on the non-linear of pressure switch or sensor and them, and other relevant issues, and as non-repetitive characteristic, and other known influence relevant problem with being subjected to electromagnetic interference (EMI), or the like.

According to some mode of executions, the present invention can be the form of equipment, as pump controller, it is characterized in that one or more modules are configured to: in response to one or more input signals that the relevant information of the electric current that provides with pump is provided; And be configured to provide comprise be used for not the direct sensing pumping pressure and one or more output signals of the information that control pump moves under substantially constant pressure.

Embodiments of the present invention also comprise one or more in the following feature:

For example, that these one or more modules can be configured to be based upon at least in part is that each pump is proofreaied and correct, about the operation that the form of voltage and current characteristic comes control pump, wherein said characteristic can by under establish an equation definite:

I＝Vm+C，

Wherein, m=(I1-I2)/(V1-V2),

C＝(V1*I2-V2*I1)/(V1-V2)，

(V1, I1): the low spot of curve, and

(V2, I2): the high point of curve.

These one or more input signals can comprise the information of the relevant actual motor current that is used for process pump that senses, and these one or more output signals can comprise about that read from form and information this corresponding voltage of actual motor current that senses.These one or more input signals can also comprise the information about the comparison of this actual motor current that senses and setting electric current.These one or more modules can also be configured to provide correction term to move under substantially constant pressure to control this pump.

These one or more modules or this equipment as a whole all can be configured for the PID controller of control pump operation.

This equipment can also adopt the form of controller, and its feature shows as one or more signal processing modules, and these one or more signal processing modules are configured in response to one or more input signals that the relevant information of the electric current that provides with pump is provided; And be configured to provide be used for not the direct sensing pumping pressure and the output signal of the information that control pump moves one or more comprising under substantially constant pressure.The mode of execution of this controller can be included in one or more in the feature described herein.This controller can also form pumping system or have the part of the device of pump.

The present invention can also adopt its feature to show as the form of the method step of control pump, and this method comprises in response to one or more input signals that the relevant information of the electric current that provides with pump is provided; And provide be used for not the direct sensing pumping pressure and the output signal of the information that control pump moves one or more comprising under substantially constant pressure.The mode of execution of this method can comprise in order to realize the step of one or more features described here.

The present invention can also take the form of computer program, it has computer-readable medium, this computer-readable medium is built-in carries out the computer-executable code of the step of this method when being used on signal processing apparatus operation, and this signal processing apparatus forms a part such as the element 10 of this pump controller.By way of example, the form of computer program can be CD, floppy disk, memory stick, memory cards, and the storage arrangement of other types or kind, it can store this computer-executable code on this computer-readable medium that develops future known or afterwards now.

Description of drawings

Accompanying drawing comprises with figure below, its not drawn on scale:

Fig. 1 comprises Fig. 1 a and Fig. 1 b, and wherein Fig. 1 a is the skeleton diagram of equipment, comprises pump controller according to certain embodiments of the present invention; And Fig. 1 b is used for the flow diagram of the method for execution graph 1a equipment according to certain embodiments of the present invention.

Fig. 2 is diaphragm lift of pump flow (head-flow) characteristic curve.

Fig. 3 is illustrated in constant pressure as the electric current of the V-I characteristic of diaphragm pump under 30 pound per square inches (PSI) and the curve of voltage relationship.

Fig. 4 is the skeleton diagram of equipment, comprises the pumping system of tape controller according to certain embodiments of the present invention.

Fig. 5 shows electric current and voltage curve, wherein the V-I characteristic of the expectation electric current of the diaphragm pump of with good grounds some embodiments of the present invention under constant pressure and acquisition electric current.

Fig. 6 comprises Fig. 6 a to Fig. 6 h, shows the functional flow diagram of the step of Display Realization equipment according to certain embodiments of the present invention.

Plotted curve shown in Fig. 7 has a PSI and gallon flow curve/running package winding thread of the part of the relation of per minute (GPM) who forms according to certain embodiments of the present invention.

Fig. 8 illustrates the flow chart of demonstration light emitting diode (LED) indicator code according to certain embodiments of the present invention.

Embodiment

Fig. 1 a illustrates the equipment of the pump controller form that is characterized as one or more modules 12 and 14 of reference character 10 expressions of applying greatly.These one or more modules 12 are configured in response to one or more input signals that the relevant information of the electric current that provides with pump (seeing element 30 (Fig. 4)) is provided; And also be configured to provide be used for not the direct sensing pumping pressure and the output signal of the information that control pump 30 (Fig. 4) moves one or more comprising under substantially constant pressure.

According to certain embodiments of the present invention, these one or more modules 12 can be configured to be based upon at least in part the operation that the form of the characteristic relevant with voltage and current that each pump proofreaies and correct comes control pump 30 (Fig. 4), wherein said characteristic can by under the decision that establishes an equation:

I＝Vm+C，

Wherein, m=(I1-I2)/(V1-V2),

C＝(V1*I2-V2*I1)/(V1-V2)，

(V1, I1): the low spot of curve, and

(V2, I2): the high point of curve.

These one or more input signals can comprise the relevant information of actual motor current that is used to move this pump that senses, and this one or more output signals can comprise about that read and information this corresponding voltage of actual motor current that senses from the correction form.These one or more input signals can also comprise the information about the comparison of this actual motor current that senses and setting electric current.These one or more modules 12 can also be configured to provide correction term to move under substantially constant pressure to control this pump.

This one or more modules 12 or make as a whole device 10 and all can be configured to module (seeing element 40 (Fig. 4)) or form wherein a part, this module has a PID controller 41 with the operation of following described miscellaneous part or

module

42,44,46,48 control pumps 30.As shown in the figure, module 40 comprises and for example is configured to carry out signal processing to realize one or more signal processing modules of function of the present invention.This PID controller 40 can also form apply greatly among Fig. 4 pumping system of 50 expressions or the part of device, is used for the operation of control pump 30.

These one or more modules 14 can comprise other modules of the part that can form this pump controller, be used to carry out other controller functions of a part that does not become following invention, for example, comprise processing to or the I/O function that transmits from the signal of pump/motor, sensing device etc., and the function that is associated with other devices or parts, described other devices or parts for example comprise random-access memory (ram) class device, ROM (read-only memory) (ROM) class device, control and data/address bus class device etc.

Proofread and correct form and can form for example part of memory storage apparatus.This memory storage apparatus itself can form the part of these one or more modules 12, these one or more other modules 14 or their certain combination.Memory storage apparatus is a known technology, and scope of the present invention intention be not be limited to now known or in the future after their any specific type or the kind that can develop.

The present invention can also be the form of the method shown in Fig. 1 b, this method has

step

22,24, they are configured for the constituent element of flow charts of 20 expressions of applying greatly of control pump 30 (Fig. 4), comprise in response to one or more input signals that the relevant information of the electric current that for example provided along signal path 42a (Fig. 4) with pump 30 is provided; And for example provide be used for not the direct sensing pumping pressure and the output signal of the information that control pump 30 moves one or more comprising under substantially constant pressure along signal path 41a (Fig. 4).

The structure of basic pump principle and form

Be based on assembling and working principle with following consistent general diaphragm pump according to above-mentioned indirect relation to the small part between electric current of the present invention and the pressure:

Be to be understood that as those skilled in the art in typical diaphragm pump, voltage puts on motor, motor makes rotor rotation then.This rotatablely moves and will be conducted to piston by cam.This piston rotatablely moves this subsequently and is converted to linear motion.This piston flows to driving fluid its outlet from the inlet of pump towards the linear motion of diaphragm.In this driving force of exit region, will in the fluid that flows out outlet, produce pressure.

Be in operation, if the demand at pump discharge place reduces, outlet pressure will increase so.Yet this pump is still to rotate with identical before speed.For this reason, the electric current in motor will begin to increase the pressure that is increased with response.In the same way, if the pressure of delivery side of pump is reduced to the pressure of expectation, the electric current that flows out from motor is because need the falling to produce more pressure reducing of moment of torsion so.

By the mode of example, provide Fig. 2 to show the general lift Flow characteristics of typical diaphragm pump.In this characteristic, be unique substantially for the lift flow of expecting with understanding this electric current and voltage.The important result of another one is that the pressure that will understand under two different flows can roughly not have identical voltage and current in any given time.

In order to support the understanding of mentioned above principle, the V-I characteristic under the constant pressure that Fig. 3 shows typical diaphragm pump is provided, it forms the basis according to form of the present invention or table lookup technology.

This V-I characteristic can determine like this, constant by keep-uping pressure, the whole service scope of pump (for example for+12V motor from 8.5V to 14.8V, and be not with any control electronic device, be variable speed drive (VSD)), change and put on the voltage of pump and draw electric current, the required maintained expectation constant pressure of this pump (for example 30PSI) when this constant pressure is normally moved for the expection that is in it when pump.

Should be understood that determine that corresponding V-I characteristic is unique for this given pump among Fig. 3 of form of given pump, because the V-I characteristic depends on the motor characteristic of this given pump substantially, it typically is different from another motor when comparing with other motor.In other words, according to the present invention, each pump V-I characteristic separately is sensed and definite, and for each pump forms separately the form unique to each pump, and be used to control each pump.

In case the V-I characteristic of given pump determines that available any controller or control system adopt according to table lookup technology of the present invention, by searching and follow the above-mentioned Trendline that obtains (V-I characteristic), control pump is in constant pressure.

By way of example, Fig. 4 illustrates the chart of the controll block of pumping system 50, and it has according to certain embodiments of the present invention simple but effective method.As shown, controll block or module 40 comprise device, parts or module, as PI (D) controller module 41, are used from the operation of control pump 30 with miscellaneous part or

module

42,44,46,48 1.Module 42 is along the electric current of signal path 42a sensing from motor, and provides the current sensing signal that comprises about the information of the current of electric that senses along signal path 42b.Module 44 is configured to measure the electric current under the electric moter voltage in response to the current sensing signal along signal path 42b, and the measurement current signal of the information that comprises the relevant electric current of measuring under this electric moter voltage is provided along signal path 44a.These one or more input signals that comprise with the electric current relevant information that is provided by pump 30 (Fig. 4) comprise along the current sensing signal of signal path 42b.Module 46 is configured in response to be provided to the voltage output signal E along signal path 41a of this pump 30 with the operation of control pump 30 from this PI (D) controller module 41 along signal path 41a, set down electric current at specific voltage (correction), and provide the signal that comprises the information relevant with setting electric current under the specific voltage (correction) along signal path 46a.Node module 48 be configured in response to along the signal that comprises the information relevant of signal path 44a with measurement electric current under the electric moter voltage and along signal path 46a comprise with specific voltage (corrections) under the signal of the setting electric current information of being correlated with, and provide the signal e that comprises with the information of these two signal corrections to PI (D) module 41 along signal path 48a.With following describe in further detail consistent, this signal e that is provided to this PI (D) module 41 from node module 48 along signal path 48a comprises the information about the error between the actual motor current of setting electric current and sensing, and this information will be used as the input parameter of this PID controller 41.This PI (D) module 41 is configured in response to one or more input signals, comprise along the signal e of comprising of signal path 48a of the information relevant, and be provided to the voltage output signal E of pump 30 by this PI (D) controller module 41 along path 41a with the operation of control pump 30 along signal path 41a with the electric current that provides from pump 30.Describe in further detail consistently with following, 30 voltage signal E will comprise correction term for electric moter voltage along signal path 41a to pump from this PI (D) module 41, to obtain desired pressure.Comprise these one or more output signals that are used for direct sensing pumping pressure not and control the information that this pump 30 (Fig. 4) moves under substantially constant pressure and comprise voltage output signal E along signal path 41a.Be in operation, voltage output signal E along the operation that is used for control pump 30 of signal path 41a is effectively proofreaied and correct or is revised based on the Control and Feedback system shown in Fig. 4 to small part, this system depends on the current of electric that senses and is included in relation between the information that is in the form that corresponding pump 30 proofreaies and correct, so that direct sensing pumping pressure and corresponding pump 30 is operated under the substantially constant pressure not.

Scope of the present invention is not restricted to type or the kind that is used for the signal path of exchange signal between parts or the module shown and described herein.Can predict, the signal path that embodiment uses is that the rigid line between parts shown and described herein or the module connects, or the wireless telecommunications between parts shown and described herein or the module connect, or their both combinations, and the other types known now or that develop later in the future or the signal path of kind.

Fig. 5 shows the plotted curve of electric current and voltage relationship, it has according to certain embodiments of the present invention not direct sensing pumping pressure and controls the diaphragm pump operation, under constant pressure by the expectation electric current of D (with the light colour function representation) expression with by the V-I characteristic of the electric current of the acquisition of A (with the dark colour function representation) expression.According to certain embodiments of the present invention, be in operation, these one or more modules 12 (Fig. 1) or 41 (Fig. 4) are configured to provide correction term, for example, with form along the correction voltage signal of signal path 41a, come control pump to make it move under substantially constant pressure, the electric current A of this expectation electric current D and acquisition has similar value as shown in Figure 5 under similar electric moter voltage like this, so that direct sensing pumping pressure and control the operation of diaphragm pump not.

Implementation according to this control of the present invention described herein provides a kind of height accurate, seamless (seamless) and the control algorithm that can realize easily, it provides the piecewise linear approximation (obtaining this V-I characteristic) of easy correction and less computation burden has been arranged on controller.

Regenerate this V-I curve with the piecewise linearity method.According to this piecewise linearity method, this curve is divided into the little straight line of some (desirable is infinitely great).Here get two points (check point), the relation between these two continuity points will have linear relationship.This linear relationship can be limited by following equation.

I＝Vm+C，

Wherein, m=(I1-I2)/(V1-V2),

C＝(V1*I2-V2*I1)/(V1-V2)，

(V1, I1): the low spot of curve, and

(V2, I2): the high point of curve.

Under normal conditions, this pump is applied on the motor with the current of electric of sensing reality and with voltage.Same voltage will be sent to sets the current forecasting logic element, to obtain the setting electric current of the desired pressure under the present electric moter voltage.This actual motor current that senses will be set electric current (the expectation electric current of corresponding desired pressure under this voltage-obtain) with this and compare from proofread and correct form.Error between this setting electric current and the actual motor current that senses will be as the input parameter of this PID controller.This PID controller will produce correction term (by the controller of dutycycle) for this electric moter voltage to obtain desired pressure.Next time, above-mentioned steps repeated with constant and very fast speed.

In case by electronic device and signal processing and propose here as one man implemented this algorithm, can provide along these one or more output signals of signal path 41a by prediction algorithm scheme according to the present invention to obtain such output, it provides the constant desired pressure of pump outlet.

The V-I curvilinear equation

Be description below about this V-I curvilinear equation:

From general linear equation:

I＝Vm+C，

Wherein: (V ₁, V ₁): the low spot of curve, and

(V ₂, V ₂): the high point of curve,

Can obtain:

\frac{I - I_{2}}{I_{1} - I_{2}} = \frac{V - V_{2}}{V_{1} - V_{2}}

I - I_{2} = (V - V_{2}) \frac{I_{1} - I_{2}}{V_{1} - V_{2}}

I = \frac{(I_{1} - I_{2}) V}{V_{1} - V_{2}} - \frac{V_{2} (I_{1} - I_{2})}{V_{1} - V_{2}} + I_{2}

Therefore:

m = \frac{(I_{1} - I_{2})}{V_{1} - V_{2}}

C = \frac{V_{2} (I_{2} - I_{1})}{V_{1} - V_{2}} + I_{2}

C = \frac{V_{2} (I_{2} - I_{1}) + I_{2} (V_{1} - V_{2})}{V_{1} - V_{2}}

Or

C = \frac{V_{1} I_{2} - V_{2} I_{1}}{V_{1} - V_{2}}

To small part based on this, this V-I curve is:

I = \frac{(I_{1} - I_{2})}{V_{1} - V_{2}} V + \frac{V_{1} I_{2} - V_{2} I_{1}}{V_{1} - V_{2}}

Module

12,41,42,44,46 or 48

With way of example, this

module

12,41,42,44,46 or 48 function available hardware, software, firmware or their combination are finished.In typical software realization mode, this

module

12,41,42,44,46 or 48 comprise one or more structures with microprocessor, random-access memory (ram), ROM (read-only memory) (ROM), input/output device based on microprocessor with the above-mentioned control that is connected, data and address bus.Those skilled in the art need not just can programme to realize function described herein to such implementation based on microcontroller (or microprocessor) by excessive experiment.Scope of the present invention does not attempt to be limited to any special implementation of using technology known or that develop later in the future.

Possible application

Of the present inventionly may use the implementation that comprises certain combination with following feature:

I. summary description:

By way of example, following specification is design and the development at the variable speed drives pump controller (VSD) of five cavity pumps.By way of example, this explanation application area can be sprayed from the water system to the general industry, though scope of the present invention is not intended to be limited to the type of application known at present or that develop later in the future.

II. function requirement

1. application specification

1.1 in saliferous and fresh water environment, work

1.2 voltage

1.2.1 direct current unit-9.5VDC-28.0VDC

1.2.2 the second stage of this project of Ac unit-85VAC-250VAC-will be finished after finishing the DC version.

2. ﹠amp abridges; Definition

2.1. abbreviation

2.1.1.#F-the quantity of outlet/valve/cock

2.1.2.C#-the flow curve under different voltages

2.1.3.P#-the rated point under different pressures and flow

2.1.4.GPM-gallon per minute

2.1.5.VDC-dc voltage

2.1.6.VAC-alternating current voltage

2.1.7.MTBF-the average time between the fault

2.1.8.PSI-pound per square inch

2.2. definition

2.2.1. any flow output of outlet-system

2.2.2. idle running-when the liquid that is fed to pump or be removed or supply when exhausting takes place

2.2.3. the initial stage-pump suction and the beginning amount of time that pumping spent

3. performance/life expectancy

3.1. performance

3.1.1 feature operation (is seen Fig. 6-Fig. 8)

3.1.1.1VSD it is last and have suitable power supply to connect that pump is installed in container/RV, this pump controller, for example controller 10 (Fig. 1) or module 40 (Fig. 4), diagnostic test that also can be as described in each this pump experience On/Off power supply circulation time operation proposes also in as Fig. 6.In normal operation mode, water system should pressurized and is remained on design load (outlet is opened) when demand is arranged.

3.1.1.2 in the time of as demand (P1), (P2) or (P3), this pump controller is opened pump with full gear degree/voltage, this pump may run on outside the working envelope scope (high ampere/volt), this pump controller can detect this situation and this pump that slows down up to reaching default ampere/volt.Can keep pump in this value operation, produce up to new situation, at this moment this pump controller will be reacted to this new situation.All these actions usually occur in the very short time scope, for example several seconds zero point.

3.1.1.3 along with more demands (P2) or (P3) or appearance (P4), the pressure of this water system descends, and pump descends in load/ampere figure.This pump controller can detect this new situation and pump is quickened, and up to reaching predefined value (ampere/volt), can keep the operation of pump in this value, produces up to news, and at this moment this controller will be reacted to this new situation.This technology can be employed all working point that working envelope scope shown in Figure 7 is limited.

3.1.1.4 high if desired demand (P4), this pump controller can keep full gear degree/voltage to satisfy this demand, change up to this situation.

3.1.1.5 when no longer including demand (port closing), this pump experience is higher than the high pressure of working pressure, pressure switch can disconnect the power supply that is connected to pump.

If 3.1.1.6 the inlet of idle running protection-tank/pump does not have fluid, this pump controller can detect this situation and in certain scheduled time, for example close pump after X minute.This controller also can be opened the pump pre-determined number sometimes to test sky/leakage situation and to send error signal to LED.

3.1.1.7 study-during all working pattern, this pump controller can " be learnt " operating range of volt/ampere in order to reference in the future.This study can allow this unit smooth conversion and little waste time in fluctuation.

3.1.1.8 overcurrent/low current-controller can be monitored the extraneous extreme amperage of being learnt, when this situation took place, it should close and make LED 1 flicker.See Fig. 6 and Fig. 8.

3.1.1.9 slowly leakage in time can be monitored in Leak testtion-this unit, when this pump controller detected leakage slowly in one irregular operating period, this pump can be closed in this unit.Slowly leak to make usually and itself show as the slow pressure loss, then this pumping pressure oblique ascension and closing.This often takes place under leak condition in time.This feature can allow the Preset Time that circulates, and closes and make LED 2 flickers then.See Fig. 6 and Fig. 8.

3.1.1.10 data storage

Pump controller also can be formed at plate and carry and store data on the storage, and for example plate carries the part that storage can form these one or more other modules 14, comprises following incident:

A. the number of times of idle running/low current-record idle running incident

B. overcurrent/motor stall-recording events number of times

C. the normal working hours that moves

Working hours during e. each incident

F. low voltage/ultra-voltage-recording events number of times

G. Leak testtion-recording events number of times

H. overtime-the recording events number of times

3.2 recommendation working life (MTBF)＞500 of the box that life expectancy-comprise operation and water enter hour.

4 physical features and size

4.1VSD housing should be defined as the matrix of motor and install.

4.2 power supply connect can be have enough diameters with bear 28 amperes and allow from wire harness connect reliably enough lines 12 " tap.

4.3 connect.

4.3.1 connecting, pump can or be molded to wherein equivalent based on 8 plug Molex MX150 connectors.

4.3.1.2:2 being used for+1 ground pin of power supply input, individual plug connects.

4.3.1.3:2 individual plug is used to motor that power supply is provided.

4.3.1.4:2 individual plug is used for the pressure switch input.

4.3.1.5:2 individual plug is used for the LED indicator and on/off switch is selected.These plugs are jam-packs, unless can be like this when needing.

5 some supplementary features

5.1 overtemperature protection.

5.2 except the software overcurrent protection, the unit also should utilize hardware redundancy to carry out overcurrent protection.

5.3 when the software overcurrent protection is lost efficacy, have the hardware overcurrent protection.

5.4 should be consistent with the PCB profile that provides by the ITT flow control.

5.5SMT/THT structure.

5.6 operating temperature range-10 ℉ to 150 ℉.

5.7 protection makes the influence that is not subjected to ampere/volt spike.

The advantage of above-mentioned enforcement is a lot, and mode by way of example, can comprise in following some.

Universal equation.

Expand and suitable any diaphragm pump characteristic and specification (same software is used for pumps such as 30PSI, 60PSI, 80PSI).

Software is adjusted to the particular motor characteristic.

Function mainly depends on correction.

Proofread and correct easily.

Also migrate to AC work easily.

Can provide the On-Board Diagnostics feature (most error is the function of electric current) of greater number.

Use general advanced algorithm (ecumenical advance algorithm).

Algorithm uses prediction logic.

As long as hardware satisfies the current processing capacity, can be fit to (same software is used for from 1PSI to 250PSI) for any diaphragm pump characteristic and specification regular software.

But software self-correction or external calibration.

Software does not use any pressure " sensor " to be used for its host computer algorithm, and all calculate all based on current of electric; So be " no sensor ".

Software is controlled needs opening relationships between current of electric and delivery pressure with the advanced algorithm of its height for the delivery pressure that satisfies it.

Level and smooth and the gentle flow of outlet.

That discharge pressure keeps in extended traffic demand is constant (near whole range of flows about 85%).

Rate of discharge fluctuation with the variation of input voltage is minimum.

Have advanced and accurate plate and carry electronically controlled quick quick response software algorithm.

Because advanced software absorbs and draws all higher voltages of ratio voltage rating of giving motor, the life-span of pump prolongs.

Not higher than voltage rating voltage affacts pump, and the heat that the result causes producing in the motor is inhibited.

Under the help of hardware and software combination preferably, provide a large amount of tell-tale On-Board Diagnostics features; The On-Board Diagnostics feature as idle running, pin rotor, Leak testtion, overtime, overvoltage, low voltage, excess current etc.

The idle running of pump, the Leak testtion in the system, overtime, overvoltage, low voltage.These are classified as system problem.

Excess current, no current (low current), the overheated pump problem that is classified as of shell.

These diagnosis are the visible indications by the LED flicker that makes in the outlet.

The LED output code is " system " or " pump " problem/mistake by accumulation broadly.

Can also provide LED output for each diagnostic characteristic separately by changing the error code module in the software.

The excess temperature that plate carries cuts off the safety of having strengthened the life-span of electronic equipment and having protected product.

Leak detection feature by the advanced person is come conserve water.

Scope of the present invention

Should be understood that, unless carried out other explanation, any other mode of execution of describing in the literary composition all can be used, uses or be attached to any feature, characteristic, variation or the modification described in conjunction with specific implementations in the literary composition.In addition, the figure here draws in proportion.

Though the present invention is by being that the mode of example is described with the diaphragm pump, scope of the present invention comprise uses it for known or in the future after the other types that can develop or the pump of kind.

Though the present invention is described and illustrates by exemplary mode of execution, under the situation that does not break away from the spirit and scope of the present invention, address various other interpolation and omissions before can making.

Claims

1. equipment that comprises pump controller, it comprises:

One or more modules are configured to the input signal that comprises the relevant information of the electric current that provides with pump in response to one or more; And be configured to provide be used for not the direct sensing pumping pressure and the output signal of the information that control pump moves one or more comprising under substantially constant pressure.

2. according to the equipment of claim 1, wherein these one or more modules are configured to be based upon at least in part operation that each pump is proofreaied and correct, come control pump about the form of voltage and current characteristic.

3. according to the equipment of claim 2, wherein determine by following equation about the characteristic of voltage and current:

I＝Vm+C，

Wherein, m=(I1-I2)/(V1-V2),

C＝(V1*I2-V2*I1)/(V1-V2)，

(V1, I1): the low spot of curve, and

(V2, I2): the high point of curve.

4. according to the equipment of claim 2, wherein these one or more input signals comprise the relevant information of actual motor current that is used to move this pump that senses, and these one or more output signals comprise about that read from form and information this corresponding voltage of actual motor current that senses.

5. according to the equipment of claim 4, wherein these one or more input signals comprise the information about the comparison of this actual motor current that senses and setting electric current.

6. according to the equipment of claim 5, wherein these one or more modules are configured to provide correction term to move under substantially constant pressure to control this pump.

7. according to the equipment of claim 1, wherein these one or more modules are configured for the PID controller of this pump operation of control.

8. pumping system comprises:

Controller with one or more signal processing modules, these one or more signal processing modules are configured to the input signal that comprises the relevant information of the electric current that provides with pump in response to one or more; And be configured to provide be used for not the direct sensing pumping pressure and the output signal of the information that control pump moves one or more comprising under substantially constant pressure.

9. pumping system according to Claim 8, wherein these one or more signal processing modules are configured to be based upon at least in part operation that each pump is proofreaied and correct, come control pump about the form of voltage and current characteristic.

10. according to the pumping system of claim 9, wherein relevant with voltage and current characteristic is determined by following equation:

I＝Vm+C，

Wherein, m=(I1-I2)/(V1-V2),

C＝(V1*I2-V2*I1)/(V1-V2)，

(V1, I1): the low spot of curve, and

(V2, I2): the high point of curve.

11. pumping system according to claim 9, wherein these one or more input signals comprise the relevant information of actual motor current that is used to move this pump that senses, and these one or more output signals comprise about that read from form and information this corresponding voltage of actual motor current that senses.

12. according to the pumping system of claim 11, wherein these one or more input signals comprise the information about the comparison of this actual motor current that senses and setting electric current.

13. according to the pumping system of claim 12, wherein these one or more signal processing modules are configured to provide correction term to move under substantially constant pressure to control this pump.

14. pumping system according to Claim 8, wherein this controller is configured for the PID controller of this pump operation of control.

15. pumping system according to Claim 8, this controller forms pumping system or has the part of the device of pump.

16. a method comprises:

In response to one or more input signals that the relevant information of the electric current that provides with pump is provided; And

Provide be used for not the direct sensing pumping pressure and the output signal of the information that control pump moves one or more comprising under substantially constant pressure.

17. according to the method for claim 16, wherein this method comprises and adopts one or more modules to be based upon operation that each pump is proofreaied and correct, control this pump about the form of voltage and current characteristic at least in part.

18. according to the method for claim 17, wherein this method comprises with the definite characteristic relevant with voltage and current of following equation:

I＝Vm+C，

Wherein, m=(I1-I2)/(V1-V2),

C＝(V1*I2-V2*I1)/(V1-V2)，

(V1, I1): the low spot of curve, and

(V2, I2): the high point of curve.

19. method according to claim 17, wherein these one or more input signals comprise the relevant information of actual motor current that is used to move this pump that senses, and these one or more output signals comprise about that read from form and information this corresponding voltage of actual motor current that senses, especially, these one or more input signals comprise the information about the comparison of this actual motor current that senses and setting electric current.

20. according to the method for claim 19, wherein this method comprises that these one or more modules of employing provide correction term, move under substantially constant pressure to control this pump.