CN105452670B - Pump system - Google Patents
Pump system Download PDFInfo
- Publication number
- CN105452670B CN105452670B CN201380078587.1A CN201380078587A CN105452670B CN 105452670 B CN105452670 B CN 105452670B CN 201380078587 A CN201380078587 A CN 201380078587A CN 105452670 B CN105452670 B CN 105452670B
- Authority
- CN
- China
- Prior art keywords
- synchronous motor
- case
- pressure
- pump
- resetting
- Prior art date
- Legal status (The legal status 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 status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/02—Stopping of pumps, or operating valves, on occurrence of unwanted conditions
- F04D15/0209—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0066—Control, e.g. regulation, of pumps, pumping installations or systems by changing the speed, e.g. of the driving engine
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2260/00—Function
- F05D2260/85—Starting
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/20—Arrangements for starting
Abstract
A pump system having a pump unit that has an impeller provided inside a pump casing, a synchronous motor for rotatably driving the impeller, and an inverter for controlling the synchronous motor, wherein the inverter has a signal input unit for inputting signals from a pressure detection means for detecting water pressure provided to a discharge side of the pump unit, a calculation processor for deciding the rotational speed of the synchronous motor, a storage unit for storing control parameters needed for the calculations performed by the calculation processor, and a power converter for supplying a drive current to the synchronous motor; and the calculation processor stops the synchronous motor and performs a restarting process when a pressure change of a prescribed value or greater is detected according to a signal from the pressure detection means, and performs a second restart using a rate of increase different from the rate of increase in rotational speed of the synchronous motor during the first restart in a case when the synchronous motor does not start up normally in the first restart.
Description
Technical field
The present invention relates to the pumping system of the inverter using control synchronous motor.
Background technology
In the past, mainly induction conductivity was used as the driving source of pump, but now for energy-conservation, efficient viewpoint,
Using the synchronous motor using permanent magnet.In synchronous motor, not the motor with magnetic pole position sensor have need not
Worry the failure of magnetic pole position sensor and price can be suppressed to relatively low advantage.
On the other hand, not in the case of the synchronous motor with magnetic pole position sensor, there is the inverse of control motor
Become the rotating speed that identifies of the device phenomenon that be referred to as step-out inconsistent with the rotating speed of the motor of reality, be likely to become load and do not revolve
Turn and idle state.In the case of pump, there is the water supply that can not be required, generation drinking water is cut off the water supply or equipment stops
Probability only.
For example, according to following patent documentation 1, the rotation of motor can according to the reckoning of the axis error of motor, be detected
Turn the exception of state.
Patent documentation 1：Japanese Unexamined Patent Publication 2012-60781 publications
The content of the invention
Even if however, electric current corresponding with induced voltage is also flow through in motor under desynchronizing state, its current value with just
Current value often under rotation status is roughly the same.Therefore, it is described in patent documentation 1, examined according to voltage instruction value and electric current
In the method for measured value supposition axis error, because the change of current value is small, step-out is difficult to detect by.
The present invention is completed in view of the above problems, its object is to provide following technologies, in pumping system, can easily be examined
Dendrometry is walked, and as needed resets motor, so as to be stably driven with load, continues to supply water.
In order to solve above-mentioned problem, in the present invention, used as one, pumping system includes thering is the leaf being arranged in pump case body
The pumping section of wheel, the synchronous motor for driving above-mentioned impeller rotation and the inverter for controlling above-mentioned synchronous motor, above-mentioned inverter
The signal input list of the signal of the pressure sensing cell of the detection hydraulic pressure that the discharge side for coming comfortable said pump portion with input is arranged
The computing institute that unit, the operation processing unit of the rotating speed of the above-mentioned synchronous motor of decision, storage are carried out with above-mentioned operation processing unit
The memory element of the control parameter of needs and the power conversion unit to above-mentioned synchronous motor supply driving current, above-mentioned fortune
Processing unit is calculated in basis from the signal of above-mentioned pressure sensing cell, when detecting pressure change more than setting, is carried out
The process for making above-mentioned synchronous motor stop, resetting, above-mentioned synchronous motor does not normally rise in first time resets
In the case of dynamic, with the different increment rate of the increment rate of the rotating speed of above-mentioned synchronous motor when resetting from above-mentioned first time
Reset for the second time.
According to the present invention, though occur step-out, become load do not rotate and in the case of idle state, it is also possible to
Rapidly reset motor, driving load works on.Thus, it is possible to carry out stable water supply.
Description of the drawings
Fig. 1 is the overall structure of the pumping system in embodiments of the present invention.
Fig. 2 is the structure of the inverter internal in embodiments of the present invention.
Fig. 3 is the data content of the memory element in embodiments of the present invention.
Fig. 4 is the control flow under the constant speed operating of the pump in the first embodiment of the present invention.
The control flow that Fig. 5 is processed when being the exception in the first～the 3rd embodiment of the present invention.
Fig. 6 is the control under the constant automatic operating of pressure of supply water of the automatic water supply device in the first embodiment of the present invention
Flow process processed.
Fig. 7 is the control flow under the constant speed operating of the pump in second embodiment of the present invention.
Fig. 8 is the control under the constant automatic operating of pressure of supply water of the automatic water supply device in second embodiment of the present invention
Flow process processed.
Fig. 9 is the control of the constant automatic operating of pressure of supply water of the automatic water supply device in third embodiment of the present invention
Flow process.
Figure 10 is that the pump characteristicss in third embodiment of the present invention calculate the control flow (example 1) for processing.
Figure 11 is that the pump characteristicss in third embodiment of the present invention calculate the control flow (example 2) for processing.
Figure 12 is the explanatory diagram of the pressure change that the step-out in the first embodiment of the present invention causes.
Figure 13 is saying for the pressure change that the step-out in second embodiment of the present invention causes and load current value changes
Bright figure.
Figure 14 is the explanatory diagram of the pump characteristicss in second embodiment of the present invention.
Figure 15 is explanation Fig. 1 of the pump characteristicss in third embodiment of the present invention.
Figure 16 is explanation Fig. 2 of the pump characteristicss in third embodiment of the present invention.
Specific embodiment
The first embodiment of the present invention is in the synchronous motor in pump drives, according to the change of pump secondary pressure
Detection is abnormal (step-out).
Confirm pump secondary pressure, first stop pump in the case where its variable quantity exceedes setting, after resetting,
Pump secondary pressure is reaffirmed, judges to there occurs step-out in the case where secondary pressure reaches setting.
First, the overall structure of the pumping system of the present invention is shown in Fig. 1.In Fig. 1, in pump case body impeller is provided with
Pump 10 is driven by motor 20.Motor 20 is the synchronous motor without magnetic pole position sensor.Further, motor 20 with
Inverter 30 connects, inverter 30 change output current frequency, so as to change motor 20 rotating speed be driven.In pump
Pressure sensing cell 11 is set on 10 secondary side line, and detection pump discharges lateral pressure.
The internal structure of inverter 30 is shown in Fig. 2.Receive to inverter 30 supply power supply power receiving section with exchange-
Direct current converter section 31 connects, and the alternating current power supply of acceptance is converted into DC voltage.With DC-AC converter section 32 by the unidirectional current
Pressure is again converted into the alternating current power supply of the frequency indicated by operation processing unit 34.To signal in the case of the rotating speed of change load
The input signal of input block 33.According to the signal of input, the frequency exported by operation processing unit 34 is determined, to DC-AC
Converter section 32 sends the alternating current power supply for indicating to cause to generate the frequency.Prestore in memory element 35 and use operation processing unit
Control parameter required for 34 computings for carrying out, operation processing unit 34 enters as needed the storage content of line storage unit 35
Read, write.
Showing in Fig. 3 in store in the memory element 35 being made up of volatile memory and nonvolatile memory
Hold.In addition it is also possible to instead, memory element is not provided with the inside of inverter 30, storage is installed outside inverter
Device.
Record starts the rotating speed (instruction sent to motor when exception judges in the address 1000 of volatile memory
Frequency) HzN.Record starts pressure (discharge lateral pressure) HN of pump secondary side when exception judges in address 1001.Address
1002 control parameter is not used in the first embodiment.The storage in address 1003 is set for the abnormal week for judging and processing
TN1 remaining time of the timer of phase, stores the residue for confirming the timer of abnormal Frequency in address 1004
Time TN2.The storage in address 1005 has carried out the result of abnormal judgement, has implemented the number of times CN that resets.From address
The control parameter of 1006 to address 1009 is not used in the first embodiment of the present invention.In address 1010, storage is initial
Pump secondary side pressure (discharge lateral pressure) Hm.In address 1011, the frequency of when resetting of pump (first time) is stored
Increment rate D1, increment rate D2 of the frequency of when resetting of pump (second after) is stored in address 1012.
The pump two used in judgement during abnormal judgement is processed is prestored in the address 2001 of nonvolatile memory
Pressure reference value HDG of secondary side.The control parameter of address 2002 is not used in the first embodiment of the present invention.In address
Prestoring in 2008 carries out abnormal cycle T M1 for judging and processing.Prestore in address 2009 for confirming abnormal sending out
Setting time TM2 of the timer of raw frequency.
Parameter SLD for choosing whether to perform abnormal arbitration functions is prestored in address 2010.User is set as SLD
Abnormal judgement process is not carried out in the case of 0, SLD is set as that the moment set up in condition in the case of 1 performs exception by user
Judgement is processed.Do not use in the first embodiment from the control parameter of address 3100 to address 3215.
In address 7001, prestore when reset implement number of times reached store in address 7002 in advance time
Parameter SLA for exporting fault-signal is chosen whether in the case of number ALE.In address 8001, it is stored in advance at abnormal judgement
Parameter SLR for allowing motor to reset is chosen whether in the case of being judged as exception in reason.Deposit in advance in address 8002
The permission upper limit number of times RSE that storage is reset automatically, does not allow electronic in the case where enforcement number of times CN is reset more than RSE
Machine is reset, and makes motor keep stopping.
In the case of present embodiment, the SLA of address 7001 is set as into that the ALE of 1, address 7002 is set as 2, address
8001 SLR is set as that the RSE of 1, address 8002 is set as that 1 is preferable.Stop in the rotation of the impeller caused because of accidental step-out
When causing reduced pressure, reduced pressure only occurs 1 time.Reset pump with now not sending fault-signal, can continue to supply
Water.The situation or pump for causing discharge side reduced pressure because the reason for beyond step-out, such as breakage of discharge side line etc. is just
In the case of draining, there is multiple reduced pressure.Now by exporting fault-signal, notify abnormal, reset pump
But stop it, the protection of pump and relevant device can be carried out.
However, when the step-out that causes of such as foreign body, step-out is likely to repeated.Under such circumstances, also with
It is same in the case of the reason for beyond above-mentioned step-out, in order to carry out the protection of pump and relevant device, do not make pump with exceeding needs heavy
It is new to start, but stop it.
In address 9001, in the case of with the automatic water supply device mode constant with pressure of supply water automatically operating, in advance
Pressure of supply water value HS as target is first stored, so that the detection of the pressure sensing cell 11 arranged on the secondary side line of pump 10
The value mode consistent with HS is automatically controlled to rotating speed.
Of the invention the in the case that make pump is operated with constant speed (constant rotational speed, constant frequency) is shown in Fig. 4
The control flow of one embodiment.
After starting running in a step 101, the speed specified is reached in a step 102, in volatile memory address
Discharge side pressure value Hm (step 103) at the moment is stored in 1010.The selection for carrying out step-out arbitration functions at step 104 is true
Recognize process.Below step is performed in the case of have selected step-out arbitration functions.In step 105, on volatile memory ground
The exception prestored in non-volatile memory addresses 2008 is stored in TN1 the remaining time of the timer 1 of location 1003 to sentence
The disconnected cycle, with the setting value of timer TM1, starts counting down for TN1.In step 109, the counting of timer TN1 is not also tied
In the case of beam, the counting of waiting timer TN1 terminates and return to step 109, the situation that the counting of timer TN1 has terminated
Under, current discharge lateral pressure is stored in volatile memory address 1001 as HN in step 134.In step 140
Whether the middle difference for judging Hm and HN is less than the HDG prestored in non-volatile memory addresses 2001.
The difference of Hm and HN is normal less than in the case of HDG, being judged as in a step 160, deposits volatibility in step 165
The enforcement number of times CN that resets of memory address 1005 is set as 0.Restart the counting of timer in step 181, return
Step 109.
The difference of Hm and HN is in the case of more than HDG, because there is a possibility that step-out, is judged as exception, carries out
Process during the exception of step 170, after having carried out resetting process, reset pump in step 180, in step 181
In restart the counting of timer, return to step 109.Hm is set in Fig. 4 constant, but it is also possible in step 181, passed through
The value of HN is copied into into the value of Hm and is updated.
As shown in figure 12, when there is step-out in the state of pump is with certain rotation speed operation, pump can lose the ability drawn water, institute
It is greatly reduced with the discharge lateral pressure of pump.Reduced pressure to which kind of degree becomes according to the suction condition (state of primary side) of pump
Change, therefore consider that suction condition ground determines to discharge determining reference value HDG of lateral pressure.
In the present invention, in the case where the discharge lateral pressure of pump is greatly reduced, pump is made to stop being reset.
Resetting after second is carried out in the case of not becoming normal condition, discharge side reduced pressure in once resetting.
Herein, the increment rate of the instruction frequency of the rotating speed of synchronous motor when representing that first time resets, is set smaller than second
The increment rate of instruction frequency when resetting after secondary.This is because in the case that the exception for occurring is accidental step-out,
Recover normal condition easily by making instruction frequency gently increase in resetting in first time.Reset in first time
In recovered normal condition in the case of, can interpolate that discharge lateral pressure is step-out the reason for be greatly reduced.Although it is not shown, but
Can also be the information of step-out to outside output or the reason for showing pressure change.
On the other hand, in the case of not recovering normal condition in resetting for the first time, the sometimes reason such as pneumatosis causes
Exception, in this case, existing can be by increasing the increment rate, repeatedly of instruction frequency in resetting after second
Reset and remove the situation of foreign body.
In the example of Figure 12, when the increment rate of instruction frequency when resetting first time is than resetting for the second time
The increment rate of instruction frequency is little, but when can also make the increment rate of frequency when resetting for the second time than resetting for the first time
Frequency increment rate it is little.For example, even if reason is accidental step-out, it is also possible to rise again by the way that the increment rate of frequency is larger
It is dynamic, normal condition is recovered as early as possible.After second, it can be considered that in order to extensive in first time resets for accidental step-out
When failing for normal condition again, and preparation property be set to the increment rate of gentle instruction frequency.
The details processed during the exception that step 170 is shown in Fig. 5.It is judged as in step 300 after exception, in step
Current enforcement number of times of resetting is updated in 301, adds 1 to the storage value of volatile memory address 1005, in step
Stop pump in rapid 302.Choosing whether for confirming in step 303 to be prestored in non-volatile memory addresses 7001 is defeated
Be out of order parameter SLA of signal, does not export fault-signal within step 306 in the case where SLA is set as 0, advances to step
306.In the case where SLA is set as 1, in step 304 for prestoring in non-volatile memory addresses 7002
Number of abnormality detections ALE for starting to export fault-signal is reset with the current of storage in volatile memory address 1005
Implement number of times CN to be compared, CN exports in step 305 fault-signal in the case of more than ALE.Situations of the CN less than ALE
Under do not export fault-signal within step 306, advance to step 307.
The license reset is confirmed in step 307.The condition reset is preferably allowed for according to resetting enforcement
The characteristic or use of number of times or frequency or equipment and change.Confirm in non-volatile memory addresses 8001 in advance
The selection of storage allows parameter SLR reset automatically, it is allowed to step 308 is advanced in the case of resetting, is not allowed
In the case of advance to step 309 and wait reset indicate input.In step 308, abnormal detection number of times is less than 1 time
In the case of, in the step 310 by instruction frequency when resetting prestored in non-volatile memory addresses 1011
The increment rate of rate is set as D1.In the case that abnormal detection number of times is more than 2 times, will deposit non-volatile in step 311
The increment rate of instruction frequency when resetting prestored in memory address 1012 is set as D2.
Additionally, being silent in Fig. 5, but it is also possible to the permission upper limit number of times RSE for resetting automatically and in volatibility
The current enforcement number of times CN that resets stored in storage address 1005 is compared, and leads in the case where RSE is more than CN
Crossing manual operation carries out replacement instruction.
In the case of adding frequency in the condition reset is allowed, add following condition, detect exception
Moment device TM2 when the confirmation of the abnormal frequency prestored in non-volatile memory addresses 2009 is used tricks setting value
In being stored in timer 2 remaining time of the TN2 of volatile memory address 1004, TN2 is set to count down.Before TN2 becomes 0 again
It is secondary detect exception in the case of do not allow to reset.For example, if TN2 is set as into 1 hour, 2 times within 1 hour
In the case of detecting exception, can speculate that its reason is not accidental step-out, be that external cause causes.
Show in Fig. 6 with automatic water supply device with the present invention in the case of the constant mode of pressure of supply water automatically operating
Control flow.
When detecting the reduction for discharging lateral pressure in step 100, after starting running in a step 101, in a step 102
Reach the speed specified.The selection confirmation for carrying out step-out arbitration functions at step 104 is processed.Confirmation have selected step-out and judge work(
In the case of energy, judge whether current discharge lateral pressure is higher than in non-volatile memory addresses 9001 in step 130
Goal pressure HS for prestoring.Carry out in step 131 in the case where current discharge lateral pressure is higher than goal pressure HS
The instruction of deceleration.During the instruction slowed down, output frequency is changed in step 132.Conversely, in current discharge lateral pressure
In the case of less than goal pressure HS, the instruction accelerated in step 133.During the instruction for being accelerated, in step 135
Middle change output frequency.
Then, the cycle in step 105 judging the step-out prestored in non-volatile memory addresses 2008
It is stored in timer 1 remaining time of the TN1 of volatile memory address 1003 with the setting value of timer TM1, starts TN1's
Count down.After confirming the end that counts down of TN1 in step 109, current discharge lateral pressure HN is preserved in step 134,
Judge whether HN and the difference of goal pressure HS are less than HDG in step 142.
The difference for discharging lateral pressure HN and HS is normal less than in the case of HDG, being judged as in a step 160, in step 165
The enforcement number of times CN that resets of volatile memory address 1005 is set as into 0.It is then back to step 130.
In the case of more than HDG, judgement there is a possibility that step-out to the difference of discharge lateral pressure and HS, carry out step 170
Exception when process, after having carried out resetting process, reset pump in step 180, return to step 130.
Processing during the exception of step 170 is and makes pump with the situation phase of constant speed (constant rotational speed, constant frequency) operating
Same control flow (Fig. 5), therefore omit the description.
Second embodiment of the present invention is in the synchronous motor in pump drives, according to the change of pump secondary pressure
With the change-detection step-out of load current value.
Pump secondary pressure reduce in the case of, pump load current value not less than certain value in the case of be judged as exist
The probability of step-out, normal operating is started again at by resetting motor.Structure is identical with first embodiment,
It is the structure of Fig. 1, Fig. 2.
The content and the content of nonvolatile memory of the volatile memory stored in memory element are shown in Fig. 3.
The content of memorizer is identical with first embodiment, but in the present embodiment, record starts step-out judgement in address 1002
When pump secondary side load current value AN.
The present embodiment in the case that make pump is operated with constant speed (constant rotational speed, constant frequency) is shown in Fig. 7
Control flow.
Start running in a step 101.After reaching the speed specified in a step 102, in step 103 by initial row
Go out lateral pressure Hm to be stored in the address 1010 of volatile memory.The selection for carrying out step-out arbitration functions at step 104 is true
Recognize process.In the case of have selected step-out arbitration functions, the counting of timer is started in step 105.Confirm in step 109
Timer count terminates, in step 106 current discharge lateral pressure is stored in into volatile memory address as HN
In 1001.And then be stored in current load current value as AN in volatile memory address 1002 in step 107.
As shown in figure 13, electric current corresponding with induced voltage is also flow through in motor in the state of step-out, flow through with just
The substantially equal electric current of value often under rotation status.During generation step-out, pump loses the ability drawn water, therefore the discharge lateral pressure of pump
It is greatly reduced, but load current value will not significantly change.
General pump characteristicss are shown in Figure 14.In the case where being operated with certain arbitrary frequency HzN, in delivery flow
It is Ha that lateral pressure is discharged under Qa, and load current value is Aa.Herein, in the case that delivery flow increases to Qb from Qa, side pressure is discharged
Power is reduced to Hb, and load current value increases to Ab.When understanding to have discharge lateral pressure to reduce, the relation that load current value increases.
Therefore, in the case that in step 143 HN-Hm is more than HDG, normal, return to step is judged as in a step 160
105。
Whether HN-Hm judges in step 144 current load current value in more than AN+ADG less than in the case of HDG,
It is judged as normal, return to step 105 in the step 161 in the case of more than AN+ADG.
It is judged as step-out in the case of less than AN+ADG, carries out being processed during the exception of step 170, is being risen again
After dynamic process, reset pump in step 180, return to step 105.In the state of Figure 13, by detecting mistake as early as possible
Step, is reset as early as possible, can recover normal state before pressure is greatly reduced.Thereby, it is possible to make step-out to supplying
The impact of water becomes bottom line.Process identical with first embodiment during the exception of step 170, as shown in Figure 5.
Show in Fig. 8 with automatic water supply device with the present invention in the case of the constant mode of pressure of supply water automatically operating
Control flow.
When detecting the reduction for discharging lateral pressure in step 100, start running in a step 101.Reach in step 103
To after the speed specified, the selection confirmation that step-out arbitration functions are carried out at step 104 is processed.In the selection of step-out arbitration functions
After confirmation is processed, it is stored in current load current value as AN in volatile memory address 1002 in step 107.
Judge to discharge lateral pressure whether higher than the goal pressure prestored in non-volatile memory addresses 9001 in step 130
HS.In the case that discharge lateral pressure is higher than goal pressure HS, the instruction slowed down in step 131.The finger for being slowed down
When showing, output frequency is changed in step 132.Conversely, lateral pressure is discharged less than in the case of goal pressure HS, in step 133
In the instruction that accelerated.During the instruction for being accelerated, current discharge lateral pressure is stored in as HN in step 134
After in volatile memory address 1001, output frequency is changed in step 135.
In the case where the speed for indicating has been reached, step 143 is advanced to.Hereinafter, it is and makes pump with perseverance after step 143
Situation (Fig. 7) the identical control flow of constant speed degree (constant rotational speed, constant frequency) operating, therefore omit the description.
In this second embodiment, combined with load current value by the way that lateral pressure will be discharged, can more accurately detect mistake
Step.
Illustrate sequentially for third embodiment of the present invention.In the third embodiment, deposit in the memory unit
Storage pump performance data, by compare pump operating in operating frequency (instruction frequency) under discharge lateral pressure or load electricity
Whether flow valuve is consistent with the value calculated based on performance data detecting step-out.
In the discharge lateral pressure calculated based on the performance data of pump with the discharge lateral pressure for detecting or based on pump
The load current value and the difference of the load current value for detecting that performance data is calculated judges in the case of exceeding determining reference value
For exception, normal operating is started again at by resetting motor.
First, structure is identical with first embodiment, is the structure of Fig. 1, Fig. 2.Show in Fig. 3 in memory element and store
Volatile memory content and the content of nonvolatile memory.
The storage in the address 1006 of volatile memory processes the discharge side in the calculating obtained by pump characteristicss calculating
Pressure HC.Similarly storage processes the load current value AC in the calculating obtained by pump characteristicss calculating in address 1007.
Storage in address 1008 processes the flow QC in the calculating obtained by pump characteristicss calculating.Store in address 1009 to special with pump
Property calculating process whether the result obtained carries out the result for judging to obtain with the difference of actual detected value within determining reference value.
0 is stored in the case that value of calculation is consistent with detected value, in the case that value of calculation is inconsistent with detected value 1 is stored.
Pump characteristicss data are recorded in address 3100 to the address 3215 of nonvolatile memory.Deposit non-volatile in advance
Lift (the record at measurement point 1 when the operating under a certain optional frequency (record is in address 3115) of pump is stored in reservoir
In address 3100), flow (record in address 3101), electric current (record is in address 3102), the lift at measurement point 2
(record is in address 3103), flow (record is in address 3104), electric current (record is in address 3105), same storage measurement
The lift (record is in address 3112) at lift, flow, electric current, measurement point 5 at point 3, measurement point 4, flow (are recorded on ground
In location 3113), electric current (record in address 3114).Figure the pump characteristicss number stored from address 3100 to address 3215
According to relation, as shown in figure 15.
Pump characteristicss data can also be 1 group, but current frequency in pump characteristicss calculating is processed and pre-recorded pump
The frequency of performance data is close to preferably, so storing raising at the measurement point 1～5 under other frequencies (record is in address 3215)
Journey, flow, electric current are more preferably.Frequency may not be two, preserve more than 3 frequency and corresponding data more preferably.
Volatile memory that other are used, the content of nonvolatile memory are identical with first, second embodiment, because
This is omitted the description.
Show in Fig. 9 with automatic water supply device with the present invention in the case of the constant mode of pressure of supply water automatically operating
Control flow.
When detecting the reduction for discharging lateral pressure in step 100, start running in a step 101.Reach in step 103
To after the speed specified, the selection confirmation that step-out arbitration functions are carried out at step 104 is processed.Afterwards, judge in step 130
Lateral pressure is discharged whether higher than goal pressure HS prestored in non-volatile memory addresses 9001.Discharge lateral pressure high
In the case of goal pressure HS, the instruction slowed down in step 131.During the instruction slowed down, in step 132
Change output frequency.Conversely, in the case that discharge lateral pressure is less than goal pressure HS, the instruction accelerated in step 133.
During the instruction for being accelerated, output frequency is changed in step 135.
After in step 151 current discharge lateral pressure is stored in volatile memory address 1001 as HN,
It is stored in current load current value as AN in volatile memory 1002 in step 152.Will be current in step 153
Instruction frequency be stored in volatile memory address 1000 as HzN after, carry out in step 154 at pump characteristicss calculating
Reason.
Judge whether current output (detected value) is consistent with result of calculation (value of calculation) in step 155.Consistent
In situation (value CS stored in volatile memory address 1009 is 0 situation), it is judged as normally, returning in a step 160
Return step 103.Under current output (detected value) and the inconsistent situation of result of calculation (value of calculation) (CS is 1 situation), sentence
Break as step-out, carry out being processed during the exception of step 170, after carrying out resetting process, pump is risen again in step 180
It is dynamic, return to step 103.
Process identical with the above during exception of step 170, therefore omit the description.
The pump characteristicss that step 154 is shown in Figure 10 calculate the details (example 1) for processing.
In step 400 HzN is read from volatile memory address 1000, HN is read from address 1001, from address 1002
Read AN.
In step 401 based on HzN and pre-recorded spy in non-volatile memory addresses 3100 to address 3215
Property data, calculate the pump characteristic curve under current instruction frequency HzN, details are described further below.
Based on the pump characteristic curve and current discharge lateral pressure HN for calculating in step 411, current flow is calculated
QC.In step 412 based on the flow QC and current instruction frequency HzN for calculating, ask in the calculating under flow QC
Load current value AC.In step 413, whether the difference of the current load current value AN of confirmation and the load current value AC for calculating
Difference less than the ADG pre-saved in non-volatile memory addresses 2002, AN and AC within ADG in the case of in step
Think that current output is consistent with result of calculation in 431, in the comparison CS with result of calculation of volatile memory address 1009
Middle storage 0.In the case where the difference of AN and AC is more than ADG, think that current output differs with result of calculation in step 432
Cause, 1 is stored in CS.Process advances to step 155 after terminating.
The pump characteristicss that step 154 is shown in Figure 11 calculate another example (example 2) for processing.
Based on lateral pressure flow QC is discharged in step 411 in Figure 10 (example 1), in step 412 computational load is electric
Flow valuve AC, is compared in step 413 to current load current value AN with the load current value AC for calculating.
On the other hand, load current value calculated flow rate QC is based in step 421 in Figure 11 (example 2), is counted in step 422
Calculate and discharge lateral pressure HC, current discharge lateral pressure HN is compared with discharge lateral pressure HC for calculating in step 413.
Further describe for pump characteristicss calculate to process.Based under each pre-recorded in the memory unit frequency
Flow and discharge the current pump of lateral pressure, load current value and current discharges lateral pressure HN or load current value AN calculating
Operating condition.
First, it is confirmed whether the pump characteristicss data of the presence frequency consistent with current instruction frequency HzN.Non-existent
In the case of based on carrying out the approximate calculation of pump performance (equivalent to Figure 10 closest to the performance data under the frequency of instruction frequency HzN
Or the step of Figure 11 400).Pump performance is that, relative to frequency, it is proportional that flow presses linear function, discharges lateral pressure and presses quadratic function
Proportional, it is proportional that current value presses cubic function.Thus, the pump based on the frequency for prestoring of close instruction frequency HzN is special
Property pump characteristicss data of each data when calculating the operating under current instruction frequency HzN with similarity law.
First, coefficient FC1, FC2, the FC3 used in similarity law is calculated is asked for as follows according to formula 1, formula 2, formula 3：
FC1=(F1 ÷ FC) ... formulas 1
FC2=(F1 ÷ FC)2... formula 2
FC3=(F1 ÷ FC)3... formula 3
For example, if relative to the current immediate frequency data of instruction frequency HzN being recorded in address 3115
Hz1, then for performance data H11, H12 related to lift, H13, H14, H15 measured under frequency Hz1, (record is on ground
Location 3100,3103 ..., in 3112) be multiplied by FC1 respectively and obtain HC1, HC2, HC3, HC4, HC5.Equally, for flow phase
Performance data Q11, Q12 of pass, Q13, Q14, Q15 (record address 3101,3104 ..., in 3113) be multiplied by FC2 respectively and obtain
To QC1, QC2, QC3, QC4, QC5.Further, for performance data A11, A12 related to electric current, A13, A14, A15, (record exists
Address 3102,3105 ..., in 3114) be multiplied by FC3 respectively and obtain AC1, AC2, AC3, AC4, AC5.
Approximately for example asked for by the interpolation method or Lagrange interpolation polynomial of newton.Using the interpolation method of newton
In the case of, if the characteristic curve of the discharge lateral pressure relative to delivery flow：QH curves (Hi (Qi)) are：
C0=HC1
C1=(HC2-HC1) ÷ (QC2-QC1)
C2 '=(HC3-HC1) ÷ (QC3-QC1)
C2=(C2 '-HC2) ÷ (QC3-QC2)
C3 "=(HC4-HC1) ÷ (QC4-QC1)
C3 '=(C3 "-HC2) ÷ (QC4-QC2)
C3=(C3 '-HC3) ÷ (QC4-QC3)
C4 " '=(HC5-HC1) ÷ (QC5-QC1)
C4 "=(C4 " '-HC2) ÷ (QC5-QC2)
C4 '=(C4 "-HC3) ÷ (QC5-QC3)
During C4=(C4 '-HC4) ÷ (QC5-QC4),
Can ask for as follows：
Hi(Qi)
=C0
+C1×(Qi-QC1)
+C2×(Qi-QC1)×(Qi-QN2)
+C3×(Qi-QC1)×(Qi-QN2)×(Qi-QC3)
+C4×(Qi-QC1)×(Qi-QC2)×(Qi-QC3)×(Qi-QC4)
... formula 4
Equally, if the characteristic curve of the load current value relative to delivery flow：QA curves (Ai (Qi)) are：
C5=AC1
C6=(AC2-AC1) ÷ (QC2-QC1)
C7 '=(AC3-AC1) ÷ (QC3-QC1)
C7=(C7 '-AC2) ÷ (QC3-QC2)
C8 "=(AC4-AC1) ÷ (QC4-QC1)
C8 '=(C8 "-AC2) ÷ (QC4-QC2)
C8=(C8 '-AC3) ÷ (QC4-QC3)
C9 " '=(AC5-AC1) ÷ (QC5-QC1)
C9 "=(C9 " '-AC2) ÷ (QC5-QC2)
C9 '=(C9 "-AC3) ÷ (QC5-QC3)
During C9=(C9 '-AC4) ÷ (QC5-QC4),
Can ask for as follows：
Ai(Qi)
=C5
+C6×(Qi-QC1)
+C7×(Qi-QC1)×(Qi-QN2)
+C8×(Qi-QC1)×(Qi-QN2)×(Qi-QC3)
+C9×(Qi-QC1)×(Qi-QC2)×(Qi-QC3)×(Qi-QC4)
... formula 5
(, equivalent to the step of Figure 10 401, formula 5 is equivalent to the step of Figure 11 401 for formula 4).Figure QH curve (Hi
(Qi)) and during QA curves (Ai (Qi)), as shown in figure 16.
The solution of quarternary quantic is difficult, therefore for example uses substitution method, is asked for being born under instruction frequency HzN according to formula 5
Set current value is the flow QC (equivalent to the step of Figure 11 421) in the case of AC, additionally, being drawn in instruction frequency according to formula 4
HzN down-offs are discharge lateral pressure HC in the case of QC (equivalent to the step of Figure 11 422).
Like this based on the pump characteristicss data closest to instruction frequency HzN by approximately asking for QH curves, QA curves, so
It is preferred that measurement in advance, the pump characteristicss data of storage are for the degree of each frequency 5 point of presence.
As described above, measurement in advance, the frequency of the pump characteristicss data of storage can also be one, but because QH curves, QA
Curve is not quite identical with the similarity law of pump, so the performance data under by preserving multiple operating frequencys, from the characteristic quantity
According to the middle data selected closest to current operating frequency, carry out above-mentioned performance data calculating and process, can more accurately ask for
QH curves, QA curves, as a result can accurately hold current pump operating condition.
In first and second embodiments, pump characteristicss data need not be prestored thus be simple, and because be based on
Change in operating carries out step-out judgement, so on this point of will not be affected by the change for deteriorating the pump characteristicss for causing year in year out
It is outstanding, and in the 3rd embodiment, as described above to measurement in advance, the pump characteristicss data of storage and reality
Operating condition is compared, and accurately can at short notice detect that abnormal is on this point outstanding.
Claims (8)
1. a kind of pumping system, it includes：
Pumping section, it has the impeller being arranged in pump case body；
Synchronous motor, it drives the impeller rotation；With
Inverter, its described synchronous motor of control,
The pumping system is characterised by：
The inverter includes：
Signal input unit, pressure sensing cell for detect hydraulic pressure of its input from the discharge side for being arranged at the pumping section
Signal；
Operation processing unit, it determines the rotating speed of the synchronous motor；
Memory element, its control parameter of storage by required for the computing that the operation processing unit is carried out；With
Power conversion unit, it supplies driving current to the synchronous motor,
The operation processing unit, becomes in basis from the pressure that the signal detection of the pressure sensing cell goes out more than setting
During change, enter to exercise the process that the synchronous motor stops, resetting, the synchronous motor described in resetting for the first time
In the case of non-normal starting, the increment rate with the rotating speed of synchronous motor when resetting from the first time is different
Increment rate is reset for the second time.
2. pumping system as claimed in claim 1, it is characterised in that：
The operation processing unit, the pressure change of more than setting is detected the synchronous motor is reset
Afterwards, in the case that the detected value of pressure sensing cell reverts to normal range in first time resets, by pressure change
The reason for be judged as step-out and the signal of step-out represented to outside output.
3. pumping system as claimed in claim 1, it is characterised in that：
The operation processing unit, basis from the signal detection of the pressure sensing cell go out reduced pressure setting with
When upper and load current value is below setting, enter to exercise the process that the synchronous motor stops, resetting, the
In the case of the non-normal starting of synchronous motor described in once resetting, with described same when resetting with the first time
The increment rate that the increment rate of the rotating speed of step motor is different is reset for the second time.
4. pumping system as claimed in claim 1, it is characterised in that：
In the case where the number of times reset has exceeded stipulated number, the operation processing unit exports fault-signal.
5. pumping system as claimed in claim 1, it is characterised in that：
The institute when increment rate of the rotating speed of the synchronous motor when first time resets is than resetting for the second time
The increment rate for stating the rotating speed of synchronous motor is little.
6. a kind of pumping system, it includes：
Pumping section, it has the impeller being arranged in pump case body；
Synchronous motor, it drives the impeller rotation；With
Inverter, its described synchronous motor of control,
The pumping system is characterised by：
The inverter includes：
Signal input unit, pressure sensing cell for detect hydraulic pressure of its input from the discharge side for being arranged at the pumping section
Signal；
Operation processing unit, it determines the rotating speed of the synchronous motor；
Memory element, its control parameter of storage by required for the computing that the operation processing unit is carried out；With
Power conversion unit, it supplies driving current to the synchronous motor,
In the memory element, the discharge lateral pressure being previously stored with the rotating speed of multiple synchronous motors, the rotating speed
Relative to delivery flow characteristic and load current value relative to delivery flow characteristic,
The operation processing unit, in actual rotating speed, discharges the relation of lateral pressure and load current value departing from being stored in
In the case of stating the characteristic in memory element, enter to exercise the process that the synchronous motor stops, resetting, in first time weight
It is new start described in the case of the non-normal starting of synchronous motor, with described synchronous electronic when resetting with the first time
The increment rate that the increment rate of the rotating speed of machine is different is reset for the second time.
7. pumping system as claimed in claim 6, it is characterised in that：
In the case where the number of times reset exceedes stipulated number, the operation processing unit exports fault-signal.
8. pumping system as claimed in claim 6, it is characterised in that：
The institute when increment rate of the rotating speed of the synchronous motor when first time resets is than resetting for the second time
The increment rate for stating the rotating speed of synchronous motor is little.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2013/072936 WO2015029147A1 (en) | 2013-08-28 | 2013-08-28 | Pump system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105452670A CN105452670A (en) | 2016-03-30 |
| CN105452670B true CN105452670B (en) | 2017-05-10 |
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|---|---|---|---|
| CN201380078587.1A Expired - Fee Related CN105452670B (en) | 2013-08-28 | 2013-08-28 | Pump system |
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| Country | Link |
|---|---|
| JP (1) | JP6134800B2 (en) |
| CN (1) | CN105452670B (en) |
| WO (1) | WO2015029147A1 (en) |
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| JP2017096201A (en) * | 2015-11-26 | 2017-06-01 | 株式会社荏原製作所 | pump |
| JP6718263B2 (en) * | 2016-03-08 | 2020-07-08 | 株式会社ディスコ | Constant temperature water supply method |
| JP7057142B2 (en) * | 2018-01-22 | 2022-04-19 | 株式会社荏原製作所 | Pump device |
| JP7060385B2 (en) * | 2018-01-22 | 2022-04-26 | 株式会社荏原製作所 | Pump device |
| JP2020041455A (en) * | 2018-09-07 | 2020-03-19 | 株式会社島津製作所 | Pump monitoring device and vacuum pump |
| JP7194033B2 (en) * | 2019-02-04 | 2022-12-21 | 株式会社日立産機システム | Power conversion device and its step-out determination method |
| CN112519594B (en) * | 2020-12-11 | 2022-06-14 | 长沙中联重科环境产业有限公司 | Control system and method of transmission system and electric washing and sweeping vehicle |
| CN113446236B (en) * | 2021-07-08 | 2022-11-29 | 上海威派格智慧水务股份有限公司 | Centrifugal pump idle protection method and device and edge gateway |
| CN114376411B (en) * | 2022-02-15 | 2024-01-12 | 佛山市顺德区美的饮水机制造有限公司 | Control method and device for water treatment device, storage medium and water treatment device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1404214A (en) * | 2001-09-03 | 2003-03-19 | 三菱电机株式会社 | Step failing out detecting apparatus and method for synchronous motor, driving apparatus for motor |
| CN201142568Y (en) * | 2007-08-01 | 2008-10-29 | 薛黎明 | Intelligent out-of-step protection device for synchronization motor |
| CN101884162A (en) * | 2007-12-03 | 2010-11-10 | 霍夫曼-拉罗奇有限公司 | Be used to discern the method and apparatus of stepping motor step-out |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0631619B2 (en) * | 1984-07-27 | 1994-04-27 | 株式会社荏原製作所 | Variable speed water supply device |
| JP3163285B2 (en) * | 1998-06-12 | 2001-05-08 | 文人 小松 | Synchronous motor |
| JP4604777B2 (en) * | 2005-03-16 | 2011-01-05 | パナソニック株式会社 | Motor drive device |
| JP5369381B2 (en) * | 2007-03-06 | 2013-12-18 | パナソニック株式会社 | Brushless DC motor control device and ventilation blower |
| JP5422527B2 (en) * | 2010-09-09 | 2014-02-19 | 株式会社日立カーエンジニアリング | Brushless motor control device and brushless motor system |
-
2013
- 2013-08-28 CN CN201380078587.1A patent/CN105452670B/en not_active Expired - Fee Related
- 2013-08-28 JP JP2015533833A patent/JP6134800B2/en active Active
- 2013-08-28 WO PCT/JP2013/072936 patent/WO2015029147A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1404214A (en) * | 2001-09-03 | 2003-03-19 | 三菱电机株式会社 | Step failing out detecting apparatus and method for synchronous motor, driving apparatus for motor |
| CN201142568Y (en) * | 2007-08-01 | 2008-10-29 | 薛黎明 | Intelligent out-of-step protection device for synchronization motor |
| CN101884162A (en) * | 2007-12-03 | 2010-11-10 | 霍夫曼-拉罗奇有限公司 | Be used to discern the method and apparatus of stepping motor step-out |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105452670A (en) | 2016-03-30 |
| JP6134800B2 (en) | 2017-05-24 |
| WO2015029147A1 (en) | 2015-03-05 |
| JPWO2015029147A1 (en) | 2017-03-02 |
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