CN201758362U - Equipment and frequency converter used for system state monitoring - Google Patents
Equipment and frequency converter used for system state monitoring Download PDFInfo
- Publication number
- CN201758362U CN201758362U CN2010201507400U CN201020150740U CN201758362U CN 201758362 U CN201758362 U CN 201758362U CN 2010201507400 U CN2010201507400 U CN 2010201507400U CN 201020150740 U CN201020150740 U CN 201020150740U CN 201758362 U CN201758362 U CN 201758362U
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- frequency converter
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/40—Testing power supplies
- G01R31/42—AC power supplies
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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
- F04D13/00—Pumping installations or systems
- F04D13/12—Combinations of two or more pumps
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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
- 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
- F04D15/0088—Testing machines
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/34—Testing dynamo-electric machines
- G01R31/343—Testing dynamo-electric machines in operation
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
- Emergency Alarm Devices (AREA)
- Dc-Dc Converters (AREA)
Abstract
The utility model relates to a piece of equipment and a frequency converter used for system state monitoring, which comprises at least one frequency converter (20) which is/are adapted to provide electricity to one or more than one load (30). The equipment includes a confirmation device (24) which is introduced to confirm the culminated amount of energy of one or more than one load provided or acquired from at least one frequency converter (20) within a pre-determined time cycle. The confirmation device (24) is also introduced to confirm another time the culminated amount of energy of one or more than one load provided or acquired from at least one frequency converter (20) within a pre-determined time cycle. Furthermore, the equipment comprises a comparing device, which is used to compare the two culminated amounts of energy obtained from the confirmation device. If the compared result indicates that the difference between the two culminated amounts is equal to at least a pre-determined threshold value, the system state is then marked abnormal.
Description
Technical field
The utility model relates to condition monitoring, more specifically, relates to the condition monitoring of the system that comprises at least one frequency converter.
Background technology
Frequency converter is a kind of device that is generally used for controlling motor or some other loads.Fig. 1 illustrates the representative instance of frequency converter configuration.Frequency converter 20 generally includes two converters, rectifier 21 and inverter 22, and direct voltage between this rectifier and inverter or direct-flow intermediate circuit 23.Rectifier 21 and inverter 22 can also physically separate.The example of rectifier 21 is diode bridges, its from AC power supplies 10 (such as 50 or the AC network of 60Hz) receive its input 40, utilizing leading of transistor (such as IGBT, igbt) or other semiconductors realization to control bridge (director bridge) is the example of inverter 22.Inverter 22 is generally used for regulating the power that transfers to load 30 from the intermediate circuit 23 of frequency converter.In the accompanying drawings, for example, inverter 22 connects (feed connection) 50 interconnection with load 30 by the feed that is connected such as three-phase AC.Frequency converter can be for example with reliable mode and with motor 30 for example accurately this mode of the speed of carry out desired or moment of torsion control command control this motor.Thereby frequency converter can Change Example such as the speed control of the motor fact that is fed to the power of engine be that they can be used for energy-conservation one of the main reasons.
Frequency converter can be used for to different electric.For example, a use that example is pump and fan of load, wherein, one or more pumps of one or more motor driven or fan extract liquid or gas.Provide the load of input can belong to bigger integral body by frequency converter, such as industrial process, perhaps they can work independently.Usually, use the load of carrying out feed to comprise easily frayed parts, therefore, need maintenance frequently by FREQUENCY CONTROL.Usually the supervisory control system state that need be discussed correct maintenance time.In theory, prenotice the maintenance needs,, make it hinder the use of system as few as possible to determine the time of maintenance operation.Can infer that such as the mass of system of pump speed and/or flow velocity and based on variation wherein maintenance need realize the condition monitoring to the system that comprises motor driver (such as different pumps) by observing.Yet the using system quality need be installed the corresponding measuring transducer that is connected with load itself such as pumping system.
WO 2004/059170 discloses and has a kind ofly controlled the method that the state of centrifugal pump and the moment of torsion by observing this pump and speed are monitored this state by speed change driver (VSD).In addition, a process variable such as pressure or flow velocity is used to describe this pump.Yet the method for describing in the disclosure adopts the fc-specific test FC stage, and pump speed increases with respect to the value that sets or reduces during this test phase.The variation of this speed becomes problem in repeatedly using.In addition, described method mainly is fit to only use with pump.
The utility model content
The purpose of this utility model is to provide the equipment that can solve or alleviate the problems referred to above at least.Purpose of the present invention is realized by the equipment or the frequency converter of independent claims record by its feature.The preferred embodiments of the present invention have been disclosed in the dependent claims.
The utility model is based on following steps: at least twice ground determine preset time in the cycle one or more frequency converters obtain or offer the energy total amount of one or more loads; And determined energy total amount compared each other, thereby, if the energy total amount relatively the time differs predetermined threshold at least each other, then can be registered as the pathological system state.
According to an aspect of the present utility model a kind of equipment that is used for the condition monitoring of system has been proposed, this system comprises at least one frequency converter that is arranged to one or more electric, this equipment comprises: determine device, be arranged to and determine that during the preset time cycle at least one frequency converter obtains or offer the energy total amount of one or more loads, it is characterized in that this determines that device further is arranged to and redefine the energy total amount that during the preset time cycle described at least one frequency converter obtained or offered one or more loads; And wherein, this equipment also comprises: comparison means, be arranged to determined energy total amount compared each other, and if the energy total amount that is compared differ predetermined threshold at least each other, recording exceptional system mode then.
According to another aspect of the present utility model, a kind of frequency converter of equipment of the condition monitoring that comprises above-mentioned system has been proposed.
The advantage of scheme of the present utility model is, can be applied to by the relevant condition monitoring of the different loads type of inverter supply.In addition, the solution of the present invention only adopts the energy information of frequency converter in its citation form, makes it possible to realize this scheme in simple and favourable mode.Usually, can easily from a plurality of already present frequency converters, obtain energy needed information, and without any need for the structural change of essence.
Description of drawings
Below, will the utility model be described in more detail with reference to preferred embodiments and drawings, wherein
Fig. 1 is the block diagram of frequency converter configuration;
Fig. 2 is the block diagram according to the equipment that is used for condition monitoring of embodiment; And
Fig. 3 is the example of the efficiency curve diagram of pump unit.
Embodiment
The utility model can be applied to be arranged to the relevant condition monitoring of different system that provides input for one or more loads 30 with at least one frequency converter 20, and therefore, the utility model is not limited to the device of particular type.The structure of frequency converter 20 and basic thought of the present utility model are irrelevant, and frequency converter can be made up of one or more physical units.Equally, load 30 or the connection of controlling to the type of the feed 10 of frequency converter 20, by frequency converter between them 40,50 (such as voltage level or a plurality of phase) is irrelevant with basic thought of the present utility model.Load 30 can comprise the one or more motor such as asynchronous or synchronous motor, and it further drives one or more other devices such as pump and/or machine fan.
Fig. 2 illustrates the example according to the equipment that is used for condition monitoring of embodiment.It should be noted that accompanying drawing only illustrates understands the necessary element of the utility model.The equipment of Fig. 2 not only comprises the frequency converter that will monitor and for it provides the load 30 of input, but also comprises energy calculator unit 24 and condition monitoring unit 60.Energy calculator unit 24 can be to be arranged in frequency converter 20 inner or outside unit, and perhaps it can be made of the internal element and the external unit of frequency converter 20.Preferably, energy calculator unit 24 determines that at least frequency converter 20 obtains or offer the electric energy of one or more loads.This unit 24 can determine in a manner known way the energy total amount by using from frequency converter or from voltage or current value that its connection is measured, for example, many already present frequency converters comprise that can combine integrated power supply and/or the energy used with the utility model determines function.For example, can, frequency converter obtains or offers the energy total amount of load 30 and can externally determine at frequency converter 20 connection 40 or 50 energy of propagating inner or that pass through to measure via input 10 or load 30.Yet, it should be noted that how this and the utility model are carried out definite irrelevant.Preferably, the energy information of being determined by energy calculator unit 24 further is sent to condition monitoring unit 60, this condition monitoring unit can be to be arranged in frequency converter 20 inner or outside unit, and perhaps it can be made of the internal element and the external unit of frequency converter 20.Another kind of possibility is that energy calculator unit 24 and condition monitoring unit 60 are realized as individual unit.For example, the energy information determined by energy calculator unit 24 can be sent to condition monitoring unit 60 with predetermined space and/or when the condition monitoring unit requests.For example can also use that the power calculator unit replaces energy calculator unit 24, obtain or offer the power of one or more loads 30 to determine frequency converter.In this case, power information preferably is sent to condition monitoring unit 60 or some other unit, it uses this information to come by integral and calculating for example corresponding to the energy information of special time.Also have a kind of possibility to be the energy and the power information of a plurality of frequency converters 20 are collected into as the frequency converter of primary transducer or public condition monitoring unit 60.
According to embodiment, at first, one or more frequency converters 20 obtain or offer the energy total amount of one or more loads 30 during determining the preset time cycle.For example, based on calendar time (second, divide, hour, day, week, month or year), such as the processing stage incident duration or such as the instruction that provides by the user of the beginning of energy calculator/stop, with specific mode determining unit 24 of user/application program and/or 60 energy total amount.The energy total amount can also be defined as at least one summation of above-mentioned parameter.Therefore, it should be noted that replacement is directly based on its duration, can determine the preset time cycle, make it corresponding to incident or stage (phase) etc., in this case, do not know precise durations in advance, unless incident, stage etc. have the constant duration.After this, redefine the energy total amount that during the preset time cycle one or more frequency converters 20 obtained or offered one or more loads 30.That is to say,, then redefine energy total amount corresponding to cycle of one hour if the energy total amount that frequency converter obtains or provides during cycle of one hour for example at first is provided.Should note, it is the duration of time that the duration of determining needed not be equal to the preset time cycle, if but frequency converter 20 obtain or offer the power of one or more loads 30 keep substantially constant or enough accurately known power then can determine corresponding to for example one hour the energy total amount of time cycle over time based on the cycle that is shorter than one hour.In fact, determined energy total amount representative employed energy total amount during predetermined period basically and identical predetermined period in different definite circulations importantly, and with how in different circulations, to carry out determine irrelevant.For example, the energy total amount that will obtain like this in condition monitoring unit 60 compares each other, and if these energy total amounts that compared differ predetermined threshold at least each other, recording exceptional system mode then.Predetermined threshold can be expressed as for example percentage, such as+5% ,-5% or+/-5%, perhaps represent in some other modes.For example, if this equipment is used to monitor with a plurality of frequency converters of its information gathering to primary transducer or public condition monitoring unit 60, then can set fault and/or alarm limit value in the specific mode of frequency converter and system.
According to embodiment, give the alarm or send fault-signal in response to the pathological system state that is write down.For example, condition monitoring unit 60 can come to send alarm or fault-signal from its output OUT in response to the pathological system state that is write down.According to embodiment, in this system,, carry out control and/or handover measurement in response to the pathological system state that is write down.For example, condition monitoring unit 60 can come to send control or switching command from its output OUT in response to the pathological system state that is write down.Therefore, condition monitoring unit 60 can directly be controlled other devices and prevented other damages automatically before system operator is reacted to this situation.
According to embodiment, the degree of how much verifying the pathological system state that differs each other of energy total amount based on the comparison also.According to embodiment, can use two or more predetermined thresholds to verify the degree of pathological system state, wherein, each predetermined threshold is corresponding to the specific degrees of pathological system state.For example ,+/-5% deviation can be represented not too serious abnormality (alarm with reference to), and+/-15% deviation can represent more serious abnormality (fault reference).It should be noted that applied threshold value depends on the system that the utility model uses therein under every kind of particular case.
According to embodiment, to determine the energy total amount such as one hour, one day or weekly predetermined space.Therefore, can be continuously or executing state monitoring termly.Can also redefine and subsequently comparison in response to asking to carry out by user command that this device sent or other.In addition, when the similar operation of the system's execution sequence that will monitor, can be in each energy total amount that redefines when carrying out the order discussed or its part.When determining the energy total amount with predetermined space, for example usually can with the energy total amount determined for the last time and the initial energy total amount of determining and/or with the last time before the energy total amount determined and/or compare with the mean value of two or more energy total amounts of determining before.Select based on the characteristic of using system of the present utility model.
According to embodiment, can change predetermined threshold in response to the one or more inside of representative system and/or the parameter value of external behavior.The parameter of being discussed can be for example temperature or pressure.For example, when the utility model is applied to system, when the inside of this system or external parameter act on one or more frequency converters 20 and obtain or offer the energy total amount of one or more loads 30 in the known mode of fundamental sum, can correspondingly compensate this change by changing predetermined threshold, to avoid the explanation of error of pathological system state.
In order to carry out the comparison between the energy total amount, condition monitoring unit 60 preferably includes memory MEM, and wherein the energy total amount of Que Dinging can be stored, with further comparison.Memory can also be arranged in other places of system.The value that is stored in the memory can also be used to produce the tabulation or the curve chart of different consumption, and can carry out convergent-divergent to them, perhaps they and externally measured data is compared.In addition, the result of acquisition can be connected by suitable telecommunications and be sent to another frequency converter (device that for example, is called as primary transducer) on the system layer, wherein, these results are made up, therefore, can present the result of a plurality of frequency converters 20 with unified report/warning.
The utility model can be applicable to for example pump and fan.Fig. 3 is the illustrative examples curve chart of the efficiency of pump.The curve chart of Fig. 3 is illustrated in the gross efficiency of pump under the situation of different flow velocitys and pipe diameter.As from accompanying drawing as can be seen, the optimal point of operation that is also referred to as best efficiency point is very little.In other words, even the minimum change that causes owing to wearing and tearing, pollution, damage, the leakage of for example pump/pipe also is counted as the remarkable increase of energy consumption.In the curve chart that meets as the optimal point of operation of the function of speed or other motor parameters, present different frequency converter speed.Therefore, can with the similar curve chart of the curve chart of Fig. 3 in present each speed, and this curve chart can be used for determining to be applied to the predetermined threshold of every kind of particular case.
Below, describe how to use examples more of the present utility model according to different embodiment.Although these examples relate to pump, this does not limit the load that it is applied to other types yet.
Example 1: circulating pump
Circulating pump is generally used in cooling or the heating system.Circulating pump or total amount of liquid are controlled based on for example temperature, pressure or flow measurements according to the requirement of cooling or heating, perhaps can receive control signal from other system.Usually circulating pump is mounted to a side of the primary side that is called as heat exchanger, therefore, circulating pump is to use unique device of the energy on the primary side.The characteristic feature of circulation is that the desired power total amount can significantly not change in one period short time.Common circulating pump is mounted in the circulating pump in the central-heating hot-water heating system.
According to the place of using these systems, the result who determines energy consumption preferably connects with running time or calendar time (for example, month in actual real estate system).By correct ordering, can obtain the information of split hair energy consumption about system, and need not external measurement device.In addition, energy consumption and externally measured data can be compared, such as, when relating to heating system or relating to cooling system and external temperature compare, compare with the temperature of primary side or based on temperature, energy total amount that pressure and/or flow velocity calculated.These measurement results make it possible to obtain clearly efficiency curve diagram, and they can be used to make the energy efficiency optimization of processing or be used to design improvement to the energy efficiency of system.Any error of also easier detection design system sizing.
For example, the energy total amount of determining in each case and before result or with its mean value relatively make it possible to variation in the detection system.By these change being set restriction, deterioration even fault that can detection system, and obtain required measured value.For example, limit (for example ,+/-15%), can keep in repair the time of measurement according to the Realtime Alerts arrangement of sending by system by restriction of set reporting to the police (for example ,+/-5%) and fault.The fault restriction makes it possible to locate for example potential pipe leakage of hidden fault, is decided to be the independent alarm of these hidden faults installations although differ.In some cases, even can substitute alarm fully by function of the present utility model.
Example 2: jar pump (tank pump)
Process industrial or pumping plant need the extraction of similar process usually.Its representative instance is with transmission or the process of contents from a jar to another jar.Another example is that the liquid level in the jar is maintained in the specific lower limit and the upper limit, wherein, opens this pump at the lower limit place, and closes this pump at upper limit place.Similarly mark the size of liquid tank, with the needs of the various processes of balance.The fresh water tower is typical liquid tank.
The jar pump is operated in very similar mode in each order (on/off) usually.In the ideal case, energy consumption is identical from an order to another order basically.Determine by using above-mentioned energy, based on the order of on/off restriction and by for the energy total amount relatively preestablish alarm limit and fault limits under the situation that limits the preset time order, detect the maintenance requirements of system and the fault in the system easily.Another point is that each pump has the best particular point of operation of economy aspect energy usually.Utilize these functions, easily after this relatively by for example passing through at first may to follow the order energy needed that extracts liquid at the operating point of energy economy by output (with the highest possibility speed) with the highest.Utilize known actual energy consumption, can under every kind of particular case, determine the macroeconomy pattern (time cost is with respect to cost of energy) of operation.In other words, under situation such as other factors of duration of difference circulation, the factor that may influence total cost that also will consider, can by with a plurality of different speed operation particular cycle, measure in energy total amount that each cycle period was consumed and based on measured energy and determine to guarantee the optimal point of operation of pump or some other loads for the optimal operator scheme of macroeconomy.
Example 3: a plurality of pumps
At the pumping plant of redundancy, total amount of liquid also may marked change situation under, usually, pumping plant has installation a plurality of pumps within it.Therefore, can utilize little pump to produce flow in low load place, and use a plurality of pumps simultaneously at the high flow capacity place.In addition, redundancy makes it possible to some pumps and doubles, and it can keep in repair pump again, and does not disturb processing.Because pumping plant consumes considerable energy total amount usually,, they measure so being provided with particular energy usually.In function of the present utility model, not necessarily need independent energy measurement.In this case, be called as the single assembly of primary transducer also in harvest energy information from frequency converter.This makes sets for example fault restriction and/or alarm limit separately for each pump/frequency converter and system.
Can provide the equipment of the present utility model of realizing by one or more unit, for example, energy calculator unit 24 and condition monitoring unit 60.Term " unit " relates generally to physics or logic entity, for example physical unit or its parts or software program.For example, the of the present utility model different embodiment and the combination thereof of above disclosure realized in one or more other unit that can utilize said units or utilization can physically separate or form single entity.
Can utilize the computer that is provided with suitable software or corresponding single treatment facility to realize equipment at least in part according to the utility model embodiment.An example of applicable signal handling equipment is FPGA (Field Programmable Gate Array) control (PLC).Such computer or signal handling equipment preferably comprise the working storage MEM (such as RAM) that the memory block that arithmetical operation adopts is provided and the processor CPU that carries out arithmetical operation (such as, general digital signal processor (DSP)) at least.Processor CPU can comprise one group of register, ALU and control unit.Utilize the control unit of a series of program command processor controls CPU, this serial program command is sent to processor from working storage MEM.The control unit of processor CPU can comprise the micro-order that is used for basic operation.The realization of micro-order can change according to procedure structure.Can utilize programming language that program command is encoded, programming language can be such as the high-level programming language of C, Jave etc. or such as the rudimentary programming language of machine language or assembler language.Computer can also comprise can offer system service the operating system of utilizing the computer program that control command writes.Realizing that the utility model or its a part of computer or some other equipment (such as condition monitoring unit 60 etc.) preferably include for example is used for receiving the suitable input unit of control or measurement data and being used for the printing equipment for example printing alarm and notice and/or be used to control the control data of other devices from user and/or some other devices.Preferably, this equipment also comprises the appropriate users interface, for example can set required parameter by this user interface user.Can also use such as the specific integrated circuit of ASIC (application-specific integrated circuit (ASIC)) and/or special-purpose member or be used for realizing other devices of function of the present utility model according to different embodiment.
The utility model can be in such as the existing system of frequency converter, realized and/or the principle and the device of separation can be used in the mode of concentrating or disperse.Generally include the processor and the memory of the function that can be used to realize the utility model embodiment such as the existing apparatus of frequency converter.Therefore, realize that change that different embodiment of the present utility model is required and configuration can pass through software program at least in part, this software program again can be as adding or the software program of renewal be realized.If realize function of the present utility model by software, then can provide software with the form of the computer program that comprises computer program code, wherein, carrying out this program code in computer makes computer etc. realize function of the present utility model according to the foregoing description.This computer program code can be stored in the computer-readable medium such as the suitable memory carrier of flash memory or optical memory, wherein, this computer program code can read to one or more unit of executive program code from this computer-readable medium.In addition, can program code be downloaded to one or more unit of program code execution by the suitable data network, and it can substitute or upgrade the program code that may exist.
Those skilled in the art will find significantly, along with technological progress can realize basic thought of the present utility model in a different manner.Therefore, the present invention and embodiment are not limited to the foregoing description, but can change within the scope of the claims.
Claims (8)
1. equipment that is used for the condition monitoring of system, described system comprises at least one frequency converter (20) that is arranged to one or more loads (30) power supply, described equipment comprises:
Determine device (24), be arranged to and determine that during the preset time cycle at least one frequency converter (20) obtains or offer the energy total amount of one or more loads, is characterized in that
Described definite device (24) further is arranged to and redefines the energy total amount that during the described preset time cycle described at least one frequency converter (20) obtained or offered one or more loads (30); And wherein, described equipment also comprises:
Comparison means is arranged to determined energy total amount is compared each other, and if the energy total amount that is compared differ predetermined threshold at least each other, recording exceptional system mode then.
2. equipment according to claim 1 is characterized in that, described equipment comprises that the described comparison means that is arranged in response to the recording exceptional system mode gives the alarm or sends the device of fault-signal.
3. equipment according to claim 1 is characterized in that, described equipment comprises that the described comparison means that is arranged in response to the recording exceptional system mode comes the control in the executive system and/or the device of handover measurement.
4. equipment according to claim 1 is characterized in that, described comparison means also is arranged to the device of the degree that how much writes down described pathological system state that the energy total amount based on described comparison differs each other.
5. equipment according to claim 1 is characterized in that, described device comprises and is arranged as the device that changes described predetermined threshold in response to the variation of the parameter value of representative one or more internal features of described system and/or surface.
6. according to each described equipment in the claim 1 to 5, it is characterized in that described one or more loads (30) comprise one or more motor.
7. equipment according to claim 6 is characterized in that, described one or more motor (30) are arranged to and drive one or more pumps.
8. one kind comprises the frequency converter according to each described equipment in the claim 1 to 7.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI20095352 | 2009-04-01 | ||
| FI20095352A FI20095352A0 (en) | 2009-04-01 | 2009-04-01 | Procedure and arrangements for permit monitoring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201758362U true CN201758362U (en) | 2011-03-09 |
Family
ID=40590235
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201507400U Expired - Lifetime CN201758362U (en) | 2009-04-01 | 2010-03-30 | Equipment and frequency converter used for system state monitoring |
Country Status (4)
| Country | Link |
|---|---|
| CN (1) | CN201758362U (en) |
| DE (1) | DE202010000374U1 (en) |
| DK (1) | DK201000061U3 (en) |
| FI (1) | FI20095352A0 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103185003A (en) * | 2011-12-27 | 2013-07-03 | Abb公司 | Method and apparatus for optimizing energy efficiency of pumping system |
| CN105281295A (en) * | 2014-07-02 | 2016-01-27 | 克利万工业-电子有限公司 | Method and safety device for protecting an electric motor and/or a work device coupled to it against malfunction |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102323806B (en) * | 2011-07-08 | 2012-12-19 | 中冶南方（武汉）自动化有限公司 | Inverter monitoring platform and monitoring method thereof |
| EP2851698B1 (en) * | 2013-09-18 | 2021-07-21 | ABB Schweiz AG | A method for detecting a fault in an electrical machine |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7112037B2 (en) | 2002-12-20 | 2006-09-26 | Itt Manufacturing Enterprises, Inc. | Centrifugal pump performance degradation detection |
-
2009
- 2009-04-01 FI FI20095352A patent/FI20095352A0/en not_active Application Discontinuation
-
2010
- 2010-03-15 DE DE202010000374U patent/DE202010000374U1/en not_active Expired - Lifetime
- 2010-03-25 DK DKBA201000061U patent/DK201000061U3/en not_active IP Right Cessation
- 2010-03-30 CN CN2010201507400U patent/CN201758362U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103185003A (en) * | 2011-12-27 | 2013-07-03 | Abb公司 | Method and apparatus for optimizing energy efficiency of pumping system |
| CN103185003B (en) * | 2011-12-27 | 2015-10-21 | Abb技术有限公司 | For the method and apparatus of the energy efficiency of optimization pumping system |
| US9382903B2 (en) | 2011-12-27 | 2016-07-05 | Abb Oy | Method and apparatus for optimizing energy efficiency of pumping system |
| CN105281295A (en) * | 2014-07-02 | 2016-01-27 | 克利万工业-电子有限公司 | Method and safety device for protecting an electric motor and/or a work device coupled to it against malfunction |
| CN105281295B (en) * | 2014-07-02 | 2019-10-29 | 克利万工业-电子有限公司 | For protecting motor and/or being coupled to method and protection equipment of the operation machine from incorrect control operation of motor |
Also Published As
| Publication number | Publication date |
|---|---|
| DK201000061U3 (en) | 2010-07-23 |
| FI20095352A0 (en) | 2009-04-01 |
| DE202010000374U1 (en) | 2010-07-01 |
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