CN105452670A - Pump system - Google Patents
Pump system Download PDFInfo
- Publication number
- CN105452670A CN105452670A CN201380078587.1A CN201380078587A CN105452670A CN 105452670 A CN105452670 A CN 105452670A CN 201380078587 A CN201380078587 A CN 201380078587A CN 105452670 A CN105452670 A CN 105452670A
- Authority
- CN
- China
- Prior art keywords
- synchronous motor
- time
- pressure
- rotating speed
- pump
- 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.)
- Granted
Links
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
-
- 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
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Non-Positive-Displacement Pumps (AREA)
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 synchronization motor.
Background technique
In the past, main use sense induction motor as the driving source of pump, but now for energy-conservation, high efficiency viewpoint, adopted the synchronous motor utilizing permanent magnet.In synchronous motor, the electric tools without magnetic pole position sensor has the fault without the need to worrying magnetic pole position sensor and price can be suppressed for lower advantage.
On the other hand, when not there is the synchronous motor of magnetic pole position sensor, there is to control the phenomenon being called as step-out that rotating speed that the inverter of motor identifies is inconsistent with the rotating speed of actual motor, load non rotating and idle state may be become.When pump, there is the water supply can not carrying out requirement, the possibility that potable water is cut off the water supply or equipment stops occurs.
Such as, according to following patent documentation 1, according to the reckoning of the axis error of motor, the exception of the rotation status of motor can be detected.
Patent documentation 1: Japanese Unexamined Patent Publication 2012-60781 publication
Summary of the invention
But even if also flow through the electric current corresponding to induced voltage in motor under desynchronizing state, its current value is roughly the same with the current value under normal rolled state.Therefore, record in patent documentation 1, infer in the method for axis error according to voltage instruction value and current detection value, because the change of current value is small, so be difficult to detect step-out.
The present invention completes in view of the above problems, and its object is to provides following technology, in pumping system, easily can detect step-out, make motor reset as required, thus stably drive load, continues to supply water.
In order to solve above-mentioned problem, in the present invention, as an example, pumping system comprises the pumping section with the impeller be arranged in pump case, drive the synchronous motor of above-mentioned vane rotary, with the inverter controlling above-mentioned synchronous motor, above-mentioned inverter has the signal input unit that input carrys out the signal of the pressure sensing cell of the detection hydraulic pressure of the discharge side setting in comfortable said pump portion, determine the operation processing unit of the rotating speed of above-mentioned synchronous motor, store the storage unit of the controling parameters required for computing undertaken by above-mentioned operation processing unit, with the power conversion unit to above-mentioned synchronous motor supply driving current, above-mentioned operation processing unit is at the signal of basis from above-mentioned pressure sensing cell, when detecting the pressure change of more than specified value, carry out above-mentioned synchronous motor is stopped, the process of resetting, when the non-normal starting of above-mentioned synchronous motor during first time resets, carry out second time by the increment rate that the increment rate of the rotating speed of above-mentioned synchronous motor when resetting from above-mentioned first time is different to reset.
According to the present invention, though generation step-out, become load non rotating and idle state when, also can motor be made rapidly to reset, drive load, work on.Stable water supply can be carried out thus.
Accompanying drawing explanation
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 storage unit in embodiments of the present invention.
Fig. 4 is the control flow under the operate at constant speed of pump in the first mode of execution of the present invention.
The control flow that Fig. 5 processes when being the exception in the first ~ three mode of execution of the present invention.
Fig. 6 is the control flow under the constant automatic running of pressure of supply water of automatic water supply device in the first mode of execution of the present invention.
Fig. 7 is the control flow under the operate at constant speed of pump in the second mode of execution of the present invention.
Fig. 8 is the control flow under the constant automatic running of pressure of supply water of automatic water supply device in the second mode of execution of the present invention.
Fig. 9 is the control flow of the constant automatic running of pressure of supply water of automatic water supply device in the 3rd mode of execution of the present invention.
Figure 10 is the control flow (example 1) of the pump characteristics computing in the 3rd mode of execution of the present invention.
Figure 11 is the control flow (example 2) of the pump characteristics computing in the 3rd mode of execution of the present invention.
Figure 12 is the explanatory drawing of the pressure change that the step-out in the first mode of execution of the present invention causes.
Figure 13 is the explanatory drawing that pressure changes and load current value changes that the step-out in the second mode of execution of the present invention causes.
Figure 14 is the explanatory drawing of the pump characteristics in the second mode of execution of the present invention.
Figure 15 is the explanatory drawing 1 of the pump characteristics in the 3rd mode of execution of the present invention.
Figure 16 is the explanatory drawing 2 of the pump characteristics in the 3rd mode of execution of the present invention.
Embodiment
First mode of execution of the present invention is in the synchronous motor in pump drives, and the change according to pump secondary pressure detects abnormal (step-out).
Confirm pump secondary pressure, first make pump stop when its variable quantity exceedes specified value, after resetting, reaffirm pump secondary pressure, judge when secondary pressure reaches specified value to there occurs step-out.
First, the overall structure of pumping system of the present invention has been shown in Fig. 1.In Fig. 1, the pump 10 being provided with impeller in pump case is driven by motor 20.Motor 20 is the synchronous motors without magnetic pole position sensor.And then motor 20 is connected with inverter 30, inverter 30 changes the frequency of output current, thus the rotating speed ground changing motor 20 drives.The second side pipe arrangement of pump 10 arranges pressure sensing cell 11, testing pump discharge side pressure.
The internal structure of inverter 30 has been shown in Fig. 2.Accept to be connected with AC-DC changeover part 31 power receiving section of the power supply that inverter 30 supplies, the ac power supply of acceptance is converted into VDC.With DC-AC changeover part 32, this VDC is converted again to the ac power supply of the frequency indicated by operation processing unit 34.To signal input unit 33 input signal when changing the rotating speed of load.According to the signal of input, determine the frequency exported by operation processing unit 34, the ac power supply that instruction makes to generate this frequency is sent to DC-AC changeover part 32.In storage unit 35, prestore the controling parameters required for computing undertaken by operation processing unit 34, operation processing unit 34 carries out reading, the write of the storage content of storage unit 35 as required.
The content stored in the storage unit 35 be made up of volatile memory and nonvolatile memory has been shown in Fig. 3.In addition, also instead, in the inside of inverter 30, storage unit can be set, in inverter outside, storage device be installed.
In the address 1000 of volatile memory, record starts rotating speed (instruction frequency to motor sends) HzN when extremely judging.In address 1001, record starts pressure (discharge side pressure) HN of pump second side when extremely judging.The controling parameters of address 1002 does not use in the first embodiment.In address 1003, store setting carry out abnormal TN1 remaining time judging the timer in the cycle of process, in address 1004, store TN2 remaining time of the timer for confirming abnormal Frequency.Store in address 1005 carried out abnormal judgement result, namely implement the number of times CN that resets.Do not use the first mode of execution of the present invention from the controling parameters of 1006 to address, address 1009.In address 1010, store pressure (discharge side pressure) Hm of initial pump second side.In address 1011, store the increment rate D1 of the frequency of (for the first time) during the resetting of pump, in address 1012, store the increment rate D2 of the frequency of (after second time) during the resetting of pump.
The abnormal pressure reference value HDG judging the pump second side used in judgement in process is prestored in the address 2001 of nonvolatile memory.The controling parameters of address 2002 does not use in the first mode of execution of the present invention.Prestore in address 2008 and carry out the abnormal cycle T M1 judging process.The set time TM2 of the timer for confirming abnormal Frequency is prestored in address 2009.
The parameter SLD selecting whether execute exception arbitration functions is prestored in address 2010.User does not carry out exception and judges process when SLD being set as 0, judge process when SLD is set as 1 by user in the moment execute exception that condition is set up.Do not use in the first embodiment from the controling parameters of 3100 to address, address 3215.
In address 7001, prestore when resetting the parameter SLA implementing to select whether to export trouble signal number of times reaches the number of times ALE stored in address 7002 in advance.In address 8001, be stored in advance in the abnormal parameter SLR judging to select when being judged as abnormal in process whether to allow motor to reset.In address 8002, prestore the permission upper limit number of times RSE automatically reset, implement number of times CN and reset more than not allowing motor when RSE when resetting, make motor keep stopping.
When present embodiment, the SLA of address 7001 is set as 1, the ALE of address 7002 is set as 2, the SLR of address 8001 is set as 1, the RSE of address 8002 is set as that 1 is better.When the rotation of the impeller caused because of accidental step-out stops causing pressure to reduce, pressure reduces only generation 1 time.Pump is not reset with now sending trouble signal, can continue to supply water.Just when draining, there is repeatedly pressure and reduce in the situation causing discharge side pressure to reduce because of the breakage etc. of the reason beyond step-out, such as discharge side pipe arrangement or pump.Now by exporting trouble signal, notice is abnormal, does not make pump reset but makes it stop, can carrying out the protection of pump and relevant device.
But in the situations such as the step-out that such as foreign matter causes, step-out also may occur repeatedly.Under such circumstances, also same with when reason beyond above-mentioned step-out, in order to carry out the protection of pump and relevant device, not making pump exceed and desirably resetting, but make it stop.
In address 9001, when automatically operating in the mode that pressure of supply water is constant with automatic water supply device, prestore the pressure of supply water value HS as target, to make the checkout value of the pressure sensing cell 11 that the second side pipe arrangement of pump 10 the is arranged mode consistent with HS, rotating speed is controlled automatically.
The control flow of the first mode of execution of the present invention when pump is operated with constant speed (constant rotational speed, constant frequency) has been shown in Fig. 4.
In a step 101 after entry into service, reach the speed of specifying in a step 102, in volatile memory address 1010, store the discharge side force value Hm (step 103) in this moment.The selection carrying out step-out arbitration functions at step 104 confirms process.Following step is performed when have selected step-out arbitration functions.In step 105, the cycle being stored in the exception judgement prestored in non-volatile memory addresses 2008 in the remaining time of the timer 1 of volatile memory address 1003 in TN1, by the setting value of timer TM1, starts counting down of TN1.In step 109, the counting of timer TN1 is also in unclosed situation, the counting of waiting timer TN1 terminates and returns step 109, when the counting of timer TN1 terminates, is stored in volatile memory address 1001 by current discharge side pressure in step 134 as HN.Judge whether the difference of Hm and HN is less than the HDG prestored in non-volatile memory addresses 2001 in step 140.
When the difference of Hm and HN is less than HDG, be judged as normal in a step 160, in step 165, the enforcement number of times CN that resets of volatile memory address 1005 be set as 0.In step 181, restart the counting of timer, return step 109.
The difference of Hm and HN is when more than HDG, because there is the possibility of step-out, so be judged as exception, process when carrying out the exception of step 170, after having carried out resetting process, in step 180, make pump reset, in step 181, restart the counting of timer, return step 109.Establish Hm constant in Fig. 4, but also when step 181, can upgrade by the value of HN is copied into the value of Hm.
As shown in figure 12, when there is step-out under pump is with the state of certain rotation speed operation, pump can lose the ability of drawing water, so the discharge side pressure of pump significantly reduces.Which kind of degree Pressure Drop is low to moderate changes according to the suction condition (state of first side) of pump, therefore considers that suction condition ground determines the determining reference value HDG of discharge side pressure.
In the present invention, when the discharge side pressure of pump significantly reduces, pump is made to stop resetting.Resetting after not becoming normal state, discharge side pressure during first time resets and carrying out for the second time when reducing., represent the increment rate of the instruction frequency of the rotating speed of the synchronous motor of first time when resetting herein, the increment rate of instruction frequency during resetting after being set smaller than second time.This is because when the exception occurred is accidental step-out, easily recover normal state by making instruction frequency gently increase in resetting for the first time.When having recovered normal state during first time resets, can judge that the reason that discharge side pressure significantly reduces is step-out.Although not shown, the reason that also can export or show pressure change to outside is the information of step-out.
On the other hand, when not recovering normal state in resetting for the first time, sometimes be the exception that the reasons such as pneumatosis cause, in this situation, exist can by increase in resetting after second time instruction frequency increment rate, repeatedly reset and remove the situation of foreign matter.
In the example of Figure 12, the increment rate of the instruction frequency when increment rate of instruction frequency when resetting for the first time is reset than second time is little, but the increment rate of frequency when resetting for the second time also can be made less than the increment rate of frequency when resetting for the first time.Such as, even if reason is accidental step-out, also by larger the resetting of the increment rate of frequency, normal state can be recovered as early as possible.After second time, when can consider to revert to normal state failure for accidental step-out in first time resets, and preparation property be set to the increment rate of mild instruction frequency.
The details processed when the exception of step 170 has been shown in Fig. 5.Be judged as in step 300 extremely, in step 301 number of times implemented to current resetting and upgrade, 1 is added to the storing value of volatile memory address 1005, makes pump stop in step 302.Confirm whether the selection prestored in non-volatile memory addresses 7001 exports the parameter SLA of trouble signal, does not export trouble signal within step 306, advance to step 306 when SLA is set as 0 in step 303.When SLA is set as 1, implement number of times CN for current the resetting stored in the number of abnormality detections ALE starting to export trouble signal prestored in non-volatile memory addresses 7002 and volatile memory address 1005 in step 304 to compare, ALE exports trouble signal in step 305 when more than CN.ALE does not export trouble signal when being less than CN within step 306, advances to step 307.
Confirm the license of resetting in step 307.The condition reset preferably is allowed to change according to resetting the characteristic or use of implementing number of times or frequency or equipment.Confirm that the selection prestored in non-volatile memory addresses 8001 allows the parameter SLR automatically reset, when allowing to reset, advance to step 308, advance to step 309 in unallowed situation and wait for the input resetting instruction.In step 308, when abnormal detection number of times is below 1 time, in the step 310 by prestore in non-volatile memory addresses 1011 reset time the increment rate of instruction frequency be set as D1.When abnormal detection number of times is more than 2 times, in step 311 by prestore in non-volatile memory addresses 1012 reset time the increment rate of instruction frequency be set as D2.
In addition, do not record in Fig. 5, but also can implementing number of times CN to the permission upper limit number of times RSE automatically reset with current the resetting stored in volatile memory address 1005 to compare, carrying out replacement instruction at RSE more than manually operating when CN.
When adding frequency in the condition allowing to reset, add following condition, when detecting that the abnormal moment, the confirmation by the abnormal frequency prestored in non-volatile memory addresses 2009 was used tricks, the setting value of device TM2 is stored in timer 2 TN2 remaining time of volatile memory address 1004, and TN2 is counted down.Do not allow when again detecting abnormal before TN2 becomes 0 to reset.Such as, if TN2 is set as 1 hour, then when detecting abnormal 2 times within 1 hour, can infer that its reason is not accidental step-out, be that external cause causes.
Control flow of the present invention when automatically operating in the mode that pressure of supply water is constant with automatic water supply device has been shown in Fig. 6.
When detecting the reduction of discharge side pressure in step 100, in a step 101 after entry into service, reach the speed of specifying in a step 102.The selection carrying out step-out arbitration functions at step 104 confirms process.When confirming to have selected step-out arbitration functions, judge that whether current discharge side pressure is higher than the goal pressure HS prestored in non-volatile memory addresses 9001 in step 130.At current discharge side pressure higher than the instruction carrying out when goal pressure HS slowing down in step 131.During the instruction of slowing down, change output frequency in step 132.On the contrary, when current discharge side pressure is lower than goal pressure HS, in step 133, the instruction accelerated is carried out.During the instruction accelerated, change output frequency in step 135.
Then, in step 105 the cycle that the step-out prestored in non-volatile memory addresses 2008 judges is stored in timer 1 TN1 remaining time of volatile memory address 1003 by the setting value of timer TM1, starts counting down of TN1.Confirm the end that counts down of TN1 in step 109 after, preserve current discharge side pressure HN in step 134, judge whether the difference of HN and goal pressure HS is less than HDG in step 142.
When the difference of discharge side pressure HN and HS is less than HDG, be judged as normal in a step 160, in step 165, the enforcement number of times CN that resets of volatile memory address 1005 be set as 0.Then step 130 is returned.
The difference of discharge side pressure and HS, when more than HDG, judges the possibility that there is step-out, processes, after having carried out resetting process, made pump reset, return step 130 in step 180 when carrying out the exception of step 170.
During the exception of step 170, process is the control flow (Fig. 5) identical with the situation making pump operate with constant speed (constant rotational speed, constant frequency), therefore omits the description.
Second mode of execution of the present invention is in the synchronous motor in pump drives, and detects step-out according to the change of pump secondary pressure and the change of load current value.
When pump secondary pressure reduces, being judged as the possibility that there is step-out when pump load current value does not exceed certain value, again starting normal running by making motor reset.Structure is identical with the first mode of execution, is the structure of Fig. 1, Fig. 2.
The content of the volatile memory stored in storage unit and the content of nonvolatile memory have been shown in Fig. 3.The content of storage is identical with the first mode of execution, but in the present embodiment, in address 1002, record starts the load current value AN of pump second side when step-out judges.
The control flow of present embodiment when pump is operated with constant speed (constant rotational speed, constant frequency) has been shown in Fig. 7.
Entry into service in a step 101.After reaching the speed of specifying in a step 102, in step 103 initial discharge side pressure Hm is kept in the address 1010 of volatile memory.The selection carrying out step-out arbitration functions at step 104 confirms process.When have selected step-out arbitration functions, start the counting of timer in step 105.In step 109, confirm that timer counting terminates, in step 106 current discharge side pressure is stored in volatile memory address 1001 as HN.And then in step 107 current load current value is stored in volatile memory address 1002 as AN.
As shown in figure 13, under the state of step-out, also flow through the electric current corresponding to induced voltage in motor, flow through the electric current roughly equal with the value under normal rolled state.When there is step-out, pump loses the ability of drawing water, and therefore the discharge side pressure of pump significantly reduces, but load current value can not change significantly.
General pump characteristics has been shown in Figure 14.When with certain arbitrary frequency HzN running, under discharge flow rate Qa, discharge side pressure is Ha, and load current value is Aa.Herein, discharge flow rate is increased to Qb from Qa, discharge side pressure is reduced to Hb, and load current value is increased to Ab.Known when having discharge side pressure to reduce, the relation that load current value increases.
Therefore, when HN-Hm is more than HDG in step 143, is judged as normal in a step 160, returns step 105.
When HN-Hm is less than HDG, judge that whether current load current value is at more than AN+ADG in step 144, be judged as when more than AN+ADG normal in the step 161, return step 105.
Being judged as step-out when being less than AN+ADG, processing when carrying out the exception of step 170, after having carried out resetting process, in step 180, made pump reset, return step 105.Under the state of Figure 13, by detecting step-out as early as possible, resetting as early as possible, before pressure significantly reduces, normal state can be recovered.Thereby, it is possible to make step-out become bottom line to for water mitigation.During the exception of step 170, process is identical with the first mode of execution, as shown in Figure 5.
Control flow of the present invention when automatically operating in the mode that pressure of supply water is constant with automatic water supply device has been shown in Fig. 8.
When detecting the reduction of discharge side pressure in step 100, entry into service in a step 101.After reaching the speed of specifying in step 103, the selection carrying out step-out arbitration functions at step 104 confirms process.After the selection of step-out arbitration functions confirms process, in step 107 current load current value is stored in volatile memory address 1002 as AN.Judge that whether discharge side pressure is higher than the goal pressure HS prestored in non-volatile memory addresses 9001 in step 130.When discharge side pressure is higher than goal pressure HS, in step 131, carry out the instruction of slowing down.During the instruction of slowing down, change output frequency in step 132.On the contrary, when discharge side pressure is lower than goal pressure HS, in step 133, carry out the instruction accelerated.During the instruction accelerated, in step 134 using current discharge side pressure as after HN is stored in volatile memory address 1001, change output frequency in step 135.
When reaching the speed of instruction, advance to step 143.Below, be the control flow identical with the situation (Fig. 7) making pump operate with constant speed (constant rotational speed, constant frequency) after step 143, therefore omit the description.
In this second embodiment, by discharge side pressure and load current value being combined, step-out can be detected more accurately.
Then the 3rd mode of execution of the present invention is described.In the third embodiment, store pump characteristics data in the memory unit, by comparing discharge side pressure under the operating frequency (instruction frequency) in pump running or load current value detects step-out with whether the value calculated based on performance data is consistent.
Being judged as exception at the discharge side pressure calculated based on pump characteristics data and the discharge side pressure detected or when exceeding determining reference value based on the load current value that pump characteristics data calculate with the difference of the load current value detected, again starting normal running by making motor reset.
First, structure is identical with the first mode of execution, is the structure of Fig. 1, Fig. 2.The content of the volatile memory stored in storage unit and the content of nonvolatile memory have been shown in Fig. 3.
The discharge side pressure HC in the calculating obtained by pump characteristics computing is stored in the address 1006 of volatile memory.In address 1007, similarly store the load current value AC in the calculating obtained by pump characteristics computing.The flow QC in the calculating obtained by pump characteristics computing is stored in address 1008.Store in address 1009 and whether the result that obtains is judged within determining reference value to the result obtained with pump characteristics computing and the difference of actual checkout value.Store 0 when calculated value is consistent with checkout value, calculated value and checkout value inconsistent when store 1.
Pump characteristics data are recorded in 3100 to the address, address 3215 of nonvolatile memory.The lift (being recorded in address 3100) at measuring point 1 place when storing the running under a certain optional frequency (being recorded in address 3115) of pump in advance in the nonvolatile memory, flow (being recorded in address 3101), electric current (being recorded in address 3102), the lift (being recorded in address 3103) at measuring point 2 place, flow (being recorded in address 3104), electric current (being recorded in address 3105), same storage measuring point 3, the lift at measuring point 4 place, flow, electric current, the lift (being recorded in address 3112) at measuring point 5 place, flow (being recorded in address 3113), electric current (being recorded in address 3114).Figure the relation of the pump characteristics data stored from 3100 to address, address 3215, as shown in figure 15.
Pump characteristics data also can be 1 group, but the frequency of frequency current in pump characteristics computing and pre-recorded pump characteristics data is close to better, thus store the lift at measuring point 1 ~ 5 place under other frequencies (being recorded in address 3215), flow, electric current are better.Frequency may not be two, and frequency and the data corresponding with it of preserving more than 3 are better.
The content of other volatile memory used, nonvolatile memory is identical with first, second mode of execution, therefore omits the description.
Control flow of the present invention when automatically operating in the mode that pressure of supply water is constant with automatic water supply device has been shown in Fig. 9.
When detecting the reduction of discharge side pressure in step 100, entry into service in a step 101.After reaching the speed of specifying in step 103, the selection carrying out step-out arbitration functions at step 104 confirms process.Afterwards, judge that whether discharge side pressure is higher than the goal pressure HS prestored in non-volatile memory addresses 9001 in step 130.When discharge side pressure is higher than goal pressure HS, in step 131, carry out the instruction of slowing down.During the instruction of slowing down, change output frequency in step 132.On the contrary, when discharge side pressure is lower than goal pressure HS, in step 133, carry out the instruction accelerated.During the instruction accelerated, change output frequency in step 135.
In step 151 using current discharge side pressure as after HN is stored in volatile memory address 1001, in step 152 current load current value is stored in volatile memory 1002 as AN.In step 153 using current instruction frequency as after HzN is stored in volatile memory address 1000, carry out pump characteristics computing in step 154.
In step 155, judge that whether current output (checkout value) is consistent with result of calculation (calculated value).In consistent situation (the value CS stored in volatile memory address 1009 is the situation of 0), be judged as normal in a step 160, return step 103.In the situation (CS is the situation of 1) that current output (checkout value) is inconsistent with result of calculation (calculated value), be judged as step-out, process when carrying out the exception of step 170, after carrying out resetting process, in step 180, make pump reset, return step 103.
During the exception of step 170, process is with identical above, therefore omits the description.
The details (example 1) of the pump characteristics computing of step 154 have been shown in Figure 10.
Read HzN from volatile memory address 1000 in step 400, read HN from address 1001, read AN from address 1002.
In step 401 based on HzN and performance data pre-recorded in non-volatile memory addresses 3100 to address 3215, calculate the pump curve under current instruction frequency HzN, details are described below.
Based on the pump curve calculated and current discharge side pressure HN in step 411, calculate current flow QC.In step 412 based on the flow QC calculated and current instruction frequency HzN, ask for the load current value AC in the calculating under this flow QC.In step 413, whether the difference of the load current value AC on confirming current load current value AN and calculating is less than the ADG preserved in advance in non-volatile memory addresses 2002, in step 431, think the difference of AN and AC is within ADG that current output is consistent with result of calculation, store 0 in volatile memory address 1009 with comparing in CS of result of calculation.When the difference of AN and AC is more than ADG, think in step 432 current output and result of calculation inconsistent, in CS store 1.Step 155 is advanced to after process terminates.
Another example (example 2) of the pump characteristics computing of step 154 has been shown in Figure 11.
In Figure 10 (example 1) in step 411 based on discharge side calculation of pressure flow QC, computational load current value AC in step 412, in step 413 to current load current value AN with calculate on load current value AC compare.
On the other hand, in Figure 11 (example 2) in step 421 based on load current value calculated flow rate QC, calculate discharge side pressure HC in step 422, in step 413 current discharge side pressure HN and the discharge side pressure HC on calculating compared.
Pump characteristics computing is further described.Current pump operating condition is calculated based on the flow under each pre-recorded in the memory unit frequency and discharge side pressure, load current value and current discharge side pressure HN or load current value AN.
First, the pump characteristics data that there is the frequency consistent with current instruction frequency HzN are confirmed whether.The calculus of approximation (being equivalent to the step 400 of Figure 10 or Figure 11) of pump performance is carried out in case of absence based on the performance data under the frequency closest to instruction frequency HzN.Pump performance is relative to frequency, and it is proportional that flow presses linear function, and it is proportional that discharge side pressure presses quadratic function, and it is proportional that current value presses cubic function.Thus, the pump characteristics data during running under current instruction frequency HzN are calculated based on each data similarity law of the pump characteristics of the frequency prestored close to instruction frequency HzN.
First, ask for during similarity law calculates according to formula 1, formula 2, formula 3 coefficient FC1, FC2, FC3 of using as follows:
FC1=(F1 ÷ FC) ... formula 1
FC2=(F1 ÷ FC)
2formula 2
FC3=(F1 ÷ FC)
3formula 3
Such as, if relative to the current immediate frequency data of instruction frequency HzN be the Hz1 of record in address 3115, then for the performance data H11 relevant to lift measured under frequency Hz1, H12, H13, H14, H15 (be recorded in address 3100,3103 ..., in 3112) be multiplied by FC1 respectively and obtain HC1, HC2, HC3, HC4, HC5.Equally, for the performance data Q11 relevant to flow, Q12, Q13, Q14, Q15 (be recorded in address 3101,3104 ..., in 3113) be multiplied by FC2 respectively and obtain QC1, QC2, QC3, QC4, QC5.And then, for the performance data A11 relevant to electric current, A12, A13, A14, A15 (be recorded in address 3102,3105 ..., in 3114) be multiplied by FC3 respectively and obtain AC1, AC2, AC3, AC4, AC5.
Approximate such as to be asked for by the interpolation of newton or Lagrange interpolation polynomial.When using the interpolation of newton, if the characteristic curve of the discharge side pressure relative to discharge flow rate: QH curve (Hi (Qi)) is:
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)
Time 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 discharge flow rate: QA curve (Ai (Qi)) is:
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)
Time 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
(formula 4 is equivalent to the step 401 of Figure 10, and formula 5 is equivalent to the step 401 of Figure 11).When figuring QH curve (Hi (Qi)) and QA curve (Ai (Qi)), as shown in figure 16.
The solution of quarternary quantic is difficult, therefore such as substitution method is used, flow QC (being equivalent to the step 421 of Figure 11) when asking for that load current value is AC under instruction frequency HzN according to formula 5, in addition, the discharge side pressure HC (being equivalent to the step 422 of Figure 11) when instruction frequency HzN down-off is QC is drawn according to formula 4.
Ask for QH curve, QA curve based on the pump characteristics data closest to instruction frequency HzN by approximate like this, thus preferably measure in advance, 5 points of the degree pump characteristics data that store exist to(for) each frequency.
As mentioned above, the frequency of the pump characteristics data measure in advance, stored also can be one, but because the similarity law of QH curve, QA curve and pump is not quite identical, so by preserving the performance data under multiple operating frequency, the data closest to current operating frequency are selected from this performance data, carry out above-mentioned performance data computing, can ask for QH curve, QA curve more accurately, result accurately can hold current pump operating condition.
In first and second mode of executions, without the need to prestore pump characteristics data, because of but simple, and because carry out step-out judgement based on the change in running, so the affecting in this point of change that can not be subject to the pump characteristics that deterioration year in year out causes is outstanding, and in the 3rd mode of execution, comparing the pump characteristics data measured in advance, store and actual operating condition as described above, accurately can detect in abnormal this point it is outstanding at short notice.
Claims (8)
1. a pumping system, it comprises:
Pumping section, it has the impeller be arranged in pump case;
Synchronous motor, it drives described vane rotary; With
Inverter, it controls described synchronous motor,
The feature of described pumping system is:
Described inverter comprises:
Signal input unit, it inputs the signal of the pressure sensing cell for detecting hydraulic pressure from the discharge side being arranged at described pumping section;
Operation processing unit, it determines the rotating speed of described synchronous motor;
Storage unit, it stores the controling parameters required for computing undertaken by described operation processing unit; With
Power conversion unit, it is to described synchronous motor supply driving current,
Described operation processing unit, when going out the pressure change of more than specified value according to the input from described pressure sensing cell, carry out the process making described synchronous motor stop, resetting, when the non-normal starting of synchronous motor described in first time resets, carry out second time by the increment rate that the increment rate of the rotating speed of synchronous motor described when resetting from described first time is different and reset.
2. pumping system as claimed in claim 1, is characterized in that:
Described operation processing unit, detecting the pressure change of more than specified value after described synchronous motor is reset, when the checkout value of pressure sensing cell has reverted to normal range (NR) during first time resets, the reason that pressure changes is judged as step-out and outside has been exported to the signal representing step-out.
3. pumping system as claimed in claim 1, is characterized in that:
Described operation processing unit, according to go out from the input of described pressure sensing cell pressure reduce more than specified value and load current value below specified value time, carry out the process making described synchronous motor stop, resetting, when the non-normal starting of synchronous motor described in first time resets, carry out second time by the increment rate that the increment rate of the rotating speed of synchronous motor described when resetting from described first time is different and reset.
4. pumping system as claimed in claim 1, is characterized in that:
When the number of times reset has exceeded stipulated number, described operation processing unit has exported trouble signal.
5. pumping system as claimed in claim 1, is characterized in that:
The increment rate of the rotating speed of the described synchronous motor when increment rate of the rotating speed of described synchronous motor when described first time resets is reset than second time is little.
6. a pumping system, it comprises:
Pumping section, it has the impeller be arranged in pump case;
Synchronous motor, it drives described vane rotary; With
Inverter, it controls described synchronous motor,
The feature of described pumping system is:
Described inverter comprises:
Signal input unit, it inputs the signal of the pressure sensing cell for detecting hydraulic pressure from the discharge side being arranged at described pumping section;
Operation processing unit, it determines the rotating speed of described synchronous motor;
Storage unit, it stores the controling parameters required for computing undertaken by described operation processing unit; With
Power conversion unit, it is to described synchronous motor supply driving current,
In described storage unit, be previously stored with the discharge side pressure under the rotating speed of multiple described synchronous motor, this rotating speed relative to the characteristic of discharge flow rate and the load current value characteristic relative to discharge flow rate,
Described operation processing unit, when the relation of the rotating speed of reality, discharge side pressure and load current value has departed from the characteristic be stored in described storage unit, carry out the process making described synchronous motor stop, resetting, when the non-normal starting of synchronous motor described in first time resets, carry out second time by the increment rate that the increment rate of the rotating speed of synchronous motor described when resetting from described first time is different and reset.
7. pumping system as claimed in claim 6, is characterized in that:
When the number of times reset exceedes stipulated number, described operation processing unit exports trouble signal.
8. pumping system as claimed in claim 6, is characterized in that:
The increment rate of the rotating speed of the described synchronous motor when increment rate of the rotating speed of described synchronous motor when described first time resets is reset than second time 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 true CN105452670A (en) | 2016-03-30 |
| CN105452670B CN105452670B (en) | 2017-05-10 |
Family
ID=52585766
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201380078587.1A Expired - Fee Related CN105452670B (en) | 2013-08-28 | 2013-08-28 | Pump system |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP6134800B2 (en) |
| CN (1) | CN105452670B (en) |
| WO (1) | WO2015029147A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110886698A (en) * | 2018-09-07 | 2020-03-17 | 株式会社岛津制作所 | Pump monitoring device and vacuum pump |
| CN112519594A (en) * | 2020-12-11 | 2021-03-19 | 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 |
| CN113446236A (en) * | 2021-07-08 | 2021-09-28 | 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 |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
| 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 (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000125580A (en) * | 1998-06-12 | 2000-04-28 | Fumito Komatsu | Synchronous motor |
| 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 |
| JP2006262581A (en) * | 2005-03-16 | 2006-09-28 | Matsushita Electric Ind Co Ltd | Motor drive device |
| JP2008220078A (en) * | 2007-03-06 | 2008-09-18 | Matsushita Electric Ind Co Ltd | Controller for brushless dc motor and ventilating air-blower |
| 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 (2)
| 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 |
| 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 WO PCT/JP2013/072936 patent/WO2015029147A1/en active Application Filing
- 2013-08-28 JP JP2015533833A patent/JP6134800B2/en active Active
- 2013-08-28 CN CN201380078587.1A patent/CN105452670B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000125580A (en) * | 1998-06-12 | 2000-04-28 | Fumito Komatsu | Synchronous motor |
| 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 |
| JP2006262581A (en) * | 2005-03-16 | 2006-09-28 | Matsushita Electric Ind Co Ltd | Motor drive device |
| JP2008220078A (en) * | 2007-03-06 | 2008-09-18 | Matsushita Electric Ind Co Ltd | Controller for brushless dc motor and ventilating air-blower |
| 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 |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110886698A (en) * | 2018-09-07 | 2020-03-17 | 株式会社岛津制作所 | Pump monitoring device and vacuum pump |
| CN110886698B (en) * | 2018-09-07 | 2021-07-16 | 株式会社岛津制作所 | Pump monitoring device and vacuum pump |
| CN112519594A (en) * | 2020-12-11 | 2021-03-19 | 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 |
| 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 |
| CN113446236A (en) * | 2021-07-08 | 2021-09-28 | 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP6134800B2 (en) | 2017-05-24 |
| WO2015029147A1 (en) | 2015-03-05 |
| JPWO2015029147A1 (en) | 2017-03-02 |
| CN105452670B (en) | 2017-05-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105452670A (en) | Pump system | |
| JP4812327B2 (en) | Water supply equipment | |
| WO2021012884A1 (en) | Control method and apparatus for automatically emptying water pump, corresponding device, and storage medium | |
| CN108720785A (en) | A kind of table dish-washer controlling Method for inflow | |
| CN115978710A (en) | Plate heat exchanger leakage-proof control method and device, air conditioner and storage medium | |
| CN111568308B (en) | Charging seat searching method and device, sweeping equipment and readable storage medium | |
| CN107120842B (en) | Supply control method for heat, for heat control device, for thermal control system and heating plant | |
| CN107767292B (en) | Intelligent water supply management system and method thereof | |
| CN115864936A (en) | Motor speed regulation control method, device and system and computer readable storage medium | |
| JP2017036669A (en) | Control device, control method and pump station | |
| JP3445317B2 (en) | Level gauge failure detection method and apparatus | |
| JP2003021069A (en) | Water supply system and its control method | |
| JP7319173B2 (en) | Control system and pumping equipment | |
| CN109323362B (en) | Refrigerant leakage fault processing method and system and air conditioner | |
| US10644638B2 (en) | Electric motor system | |
| JP2013238161A (en) | Portable engine generator | |
| CN110101310A (en) | Water leakage detection device and method for water purification machine and water purification machine | |
| TWI587235B (en) | Intelligent water supply management system and its method | |
| WO2018128004A1 (en) | Pump device and pump-device control method | |
| JP4395700B2 (en) | High pressure coolant supply device | |
| JP6581801B2 (en) | Water supply equipment | |
| JP2003343476A (en) | Variable speed water supply device | |
| KR100887149B1 (en) | Outlet low-pressure detection system of inverter booster pump system | |
| JP2021072257A (en) | Fuel cell system | |
| CN106247624A (en) | A kind of heat pump control method and device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170510 Termination date: 20210828 |