CN103376410A - Apparatus for preventive maintenance of motor - Google Patents
Apparatus for preventive maintenance of motor Download PDFInfo
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- CN103376410A CN103376410A CN201310082028XA CN201310082028A CN103376410A CN 103376410 A CN103376410 A CN 103376410A CN 201310082028X A CN201310082028X A CN 201310082028XA CN 201310082028 A CN201310082028 A CN 201310082028A CN 103376410 A CN103376410 A CN 103376410A
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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
- G01R31/34—Testing dynamo-electric machines
- G01R31/343—Testing dynamo-electric machines in operation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/02—Measuring effective values, i.e. root-mean-square values
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B11/00—Automatic controllers
- G05B11/01—Automatic controllers electric
- G05B11/32—Automatic controllers electric with inputs from more than one sensing element; with outputs to more than one correcting element
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Abstract
The present invention provides an apparatus for preventive maintenance of motor, which can improve abnormity detection precision of the motor and can perform abnormity monitoring for auxiliary equipment with an auxiliary motor and preventive maintenance on a detected motor. The motor operates based on operation quantity input from a motor driving device. The apparatus for preventive maintenance comprises the following components: a state quantity acquiring unit which acquires state quantities of the motor, which are in preset relationship with an operation quantity; a model storing unit which prestores related models that are obtained through modeling the relationship between the operation quantity and state quantity according to the relationship on condition that the motor and auxiliary equipment operate normally; a model state quantity calculating unit which calculates the state quantities in the related models stored in the model storing unit relative to the operation amount in operation of the motor; and an abnormity detection unit which detects out abnormity of the motor and auxiliary equipment through comparing the state quantity acquired by the state quantity acquiring unit with the state quantity that is obtained through calculation by the model state quantity calculating unit.
Description
Technical field
The present invention relates to the prevention secure device of motor.
Background technology
Motor is one of major equipment that consists of factory.Motor all is the important elements of factory in a lot of situations, and its fault also can affect whole factory.Therefore, in the running of factory, need to whether produce unusually by monitoring motor, prevent motor fault (i.e. prevention is saved from damage).
As the abnormality diagnostic method of in the past motor, be known that the vibration that detects when motor starting, diagnose lax (for example with reference to the patent documentation 1) of motor winding based on this testing result.
Patent documentation
Patent documentation 1: Japanese kokai publication sho 60-066647 communique
Summary of the invention
In addition, such as in the employed large-scale motor such as rolling factory of iron-smelter, the how attached air-cooler that is useful on the heating of cool motors, to the attendant equipments such as bearing feeding means of bearing oil supply.And, owing in the attendant equipment of such motor, also need to stop motor in the situation of generation fault, therefore not only need the main body of monitoring motor, but also want the attendant equipment of monitoring motor whether to produce unusually, prevent its fault.
Yet the problem that invention shown in the patent documentation 1 exists is: do not consider attendant equipment unusual of motor fully, the prevention of motor that can't comprise anomaly monitoring, the detection of the attendant equipment of motor is saved from damage.
The present invention finishes for solving such problem, obtains a kind of prevention secure device of motor, the abnormality detection precision that it can improve motor, and the prevention of motor that can comprise anomaly monitoring, the detection of the attendant equipment of attached motor is saved from damage.
The prevention secure device of motor involved in the present invention, move based on the operational ton of inputting from motor drive, comprise: the quantity of state acquiring unit, this quantity of state acquiring unit obtains the quantity of state that is in the described motor of predetermined correlationship with described operational ton; The model storage element, this model storage element stores correlation model in advance, described correlation model is according to described correlationship, and modeling forms under normal circumstances described operational ton and described state the relationship between quantities carry out with the attendant equipment of described motor and described motor; The model state amount is calculated the unit, and this model state amount is calculated the quantity of state of the described operational ton of unit when calculating in the described correlation model of described model storage unit stores with respect to described motor operation; And abnormality detection unit, this abnormality detection unit by described quantity of state that described when running obtained by described quantity of state acquiring unit with calculate the described quantity of state of calculating the unit by described model state amount and compare, detect attendant equipment unusual of described motor and described motor.
The effect that the prevention secure device of motor involved in the present invention is obtained has: can improve the abnormality detection precision of motor, the prevention of motor that can comprise anomaly monitoring, the detection of the attendant equipment of attached motor is saved from damage.
Description of drawings
Fig. 1 is the integrally-built block diagram that the prevention secure device of the related motor of embodiments of the present invention 1 is shown.
Fig. 2 is the figure that the structure of the related motor of embodiments of the present invention 1 and attendant equipment thereof is shown.
Fig. 3 is the block diagram that the functional structure of the related prevention secure device of embodiments of the present invention 1 is shown.
Fig. 4 is the chart of an example of correlation model that the prevention secure device of the related motor of embodiments of the present invention 1 is shown.
Fig. 5 is the figure of an example of abnormality juding that the prevention secure device of the related motor of embodiments of the present invention 1 is shown.
Fig. 6 is the block diagram that the functional structure of the related prevention secure device of embodiments of the present invention 2 is shown.
Fig. 7 is the block diagram that the functional structure of the related prevention secure device of embodiments of the present invention 3 is shown.
Description of reference numerals
1 motor
The 1a rotating shaft
The 1b rotor
1c rotor winding
The 1d stator core
The 1e stator winding
The attendant equipment of 2 motor
The 2a cooling fan
The 2b oil-to-water heat exchanger
The 2c pedestal
3 motor drives
4 motor side remote I/O dishes
5 drive unit side remote I/O dishes
6 communication networks
7 prevention secure devices
7a model reservoir
7b model state amount calculating section
The 7c comparing section
The 7d informing portion
7e correcting value reservoir
The 7f count section
8 winding temperatures are measured and are used resistance temperature detector
9 refrigerant temperatures are measured and are used resistance temperature detector
10 correlation models
11 threshold values
12 check points
Embodiment
The present invention is described with reference to the accompanying drawings.Same Reference numeral illustrates same section or considerable part in each figure, and suitably simplification or omission are to the explanation of its repetition.
Embodiment 1
Fig. 1 to Fig. 5 relates to embodiments of the present invention 1, and Fig. 1 is the integrally-built block diagram that the prevention secure device of motor is shown; Fig. 2 is the figure that the structure of motor and attendant equipment thereof is shown; Fig. 3 is the block diagram that the functional structure of prevention secure device is shown; Fig. 4 is the chart of an example of correlation model that the prevention secure device of motor is shown; Fig. 5 is the figure of an example of abnormality juding that the prevention secure device of motor is shown.
In Fig. 1, the 1st, motor.The attached attendant equipment 2 that motor is arranged.Fig. 2 illustrates an example about the concrete structure of the attendant equipment 2 of these motor 1 and motor.Motor 1 has the rotor 1b of the inside that rotatably is located at motor 1; And from central authorities' extension setting of this rotor 1b and the rotating shaft 1a that becomes one and be rotated with rotor 1b.Periphery at rotor 1b is provided with rotor winding 1c.And, be fixed in the motor 1 with the opposed stator winding 1e that is wound on stator core 1d of rotor winding 1c and dispose.
Be provided with air-cooler at motor 1, this air-cooler consists of by being used for cooling fan 2a and the oil-to-water heat exchanger 2b of cooling at the motor 1 inner heat that produces.Cooling fan 2a makes air in motor 1 interior circulation, and the heat that produces at motor 1 is cooled off.The air of sending in the motor 1 cools off the heat in the motor 1, and the result is heated and the temperature rising.The air that seizes the heat in the motor 1 is cooled off by oil-to-water heat exchanger 2b, reverts to cold air, and the fan 2a that is cooled afterwards sends in the motor 1 again.
By utilizing such cooling fan 2a and oil-to-water heat exchanger 2b to carry out circulating cooling, motor 1 be cooled prevent to burn etc. undesirable.In addition, oil-to-water heat exchanger 2b is included in the cooling water pipe that there is cooling water circulation inside, carries out heat interchange between air and the chilled water and comes cooling-air by making.
In addition, at the rotating shaft 1a of motor 1 the rotatably pedestal 2c of supporting revolving shaft 1a is set partly.Comprise the bearing feeding means that lubricating oil is provided to bearing at this pedestal 2c.These oil-to-water heat exchangers 2b, cooling fan 2a and pedestal 2c (bearing feeding means) are examples of the attendant equipment 2 of motor.
The action of motor 1 is driven by motor drive 3.Motor 1 is via motor side remote I/O dish 4, and motor drive 3 is connected with communication network 6 respectively via drive unit side remote I/O dish 5, and motor 1 can carry out telecommunication by communication network 6 mutually with motor drive 3.
Be connected with prevention secure device 7 at the communication network 6 that motor 1 is linked to each other with motor drive 3.This prevention secure device 7 is by being in the quantity of state of the motor 1 of predetermined correlationship based on the operational ton of the operation signal of 1 input from motor drive 3 to motor and with this operational ton, to unusually the monitoring, detect of the attendant equipment 2 of motor 1 and motor, implement the prevention of motor 1 and save from damage.
Below, illustrate with the attendant equipment 2 that utilizes 7 pairs of motor of prevention secure device be air-cooler (cooling fan 2a and oil-to-water heat exchanger 2b) unusually monitor, detect the situation into object.
Prevention secure device 7 working load rates are as the operational ton of operation signal, and the rising value conduct of use winding temperature and this operational ton (load factor) are in the quantity of state of the motor 1 of predetermined correlationship, unusually monitoring, detecting air-cooler.
The following describes the predetermined correlationship of setting up between load factor and the winding temperature rising value.
At first, load factor L be current current value with respect to the ratio of load current value, determined by following formula (1).
L=i (currency)/i (ratings) * 100 (%) (1)
Square (RMS^2) of the root mean square RMS of load factor can be represented by following formula (2).
RMS＾2＝(L1＾2·t1＋L2＾ 2·t2＋…＋Ln＾2·tn)／T···(2)
Herein, T is the object time of obtaining RMS, t1, t2 ..., tn is the sample time of cutting apart in the object time T of RMS obtaining, L1, L2 ..., Ln be respectively each sample time t1, t2 ... the load factor of tn, T=t1+t2+ ... + tn.
And, in formula (2) substitution formula (1), can obtain the relation of following formula (3).
RMS^2∝i＾2···(3)
Next, the relation of the winding electric flow valuve i of derivation winding temperature rising value Δ T and motor 1.The kind of the loss that produces at motor 1 has iron loss, copper loss, stray load loss, mechanical loss etc.Wherein, the copper loss at the thermal value place that produces of the winding coil of motor 1 occupies the major part of the loss of motor 1.Since winding temperature rising value Δ T and motor 1 be worn to direct ratio, if so as can be known the loss of motor 1 and copper loss are considered as roughly the samely, then winding temperature rising value Δ T and copper loss are that the thermal value that the winding coil of motor 1 produces is directly proportional.
If i is winding current, R is winding resistance, and t is the time, and then the thermal value Q of winding coil is represented by following formula (4).
Q＝i＾2·R·t···(4)
And, if use described winding temperature rising value Δ T to be directly proportional with thermal value Q, then derived by formula (4) and have the relation shown in the following formula (5) between winding temperature rising value Δ T and the winding current i.
ΔT∝i＾2···(5)
And, can derive the relation shown in the following formula (6) from formula (3) and formula (5).
ΔT∝RMS＾2···(6)
Like this, winding temperature rising value Δ T is directly proportional with the root mean square RMS of load factor square (RMS^2) in theory as can be known, is in a side and changes the opposing party then also with the relevant relation of this variation.
Prevention secure device 7 is by obtaining 1 operation signal that sends from motor drive 3 to motor via communication network 6, can access the operational ton that inputs to motor 1 is load factor.
In addition, for the winding temperature rising value Δ T of one of quantity of state of obtaining motor 1, at motor 1 winding temperature is installed and measures with resistance temperature detector 8 and refrigerant temperature and measure with resistance temperature detector 9 these 2 resistance temperature detectors (Resistance Temperature Detector).Winding temperature is measured with the temperature (delivery temperature) of resistance temperature detector 8 for detection of the part of the winding in the motor 1, and refrigerant temperature is measured with resistance temperature detector 9 for detection of from here to the temperature (intake air temperature) of the cold-producing medium (air) of motor 1 interior importing.
Prevention secure device 7 obtains by winding temperature via communication network 6 and measures the delivery temperature that detects with resistance temperature detector 8 and these 2 quantity of states of intake air temperature that detected with resistance temperature detector 9 by refrigerant temperature mensuration, by obtaining poor with respect to intake air temperature of delivery temperature, calculate winding temperature rising value Δ T.In addition, the related operational ton (RMS of load factor) of prevention secure device 7 obtains regularly the Timing Synchronization that obtains with quantity of state (winding temperature rising value Δ T).
By like this, because the operational ton that prevention secure device 7 obtains is that RMS and the quantity of state of load factor is that winding temperature rising value Δ T is in the proportionate relationship shown in the formula (6) in theory, if therefore the attendant equipment 2 (air-cooler) of motor 1 and motor is normal state, then load factor RMS and winding temperature rising value Δ T illustrate stronger correlativity, and the RMS of load factor square should be able to come modeling with the straight line formula shown in the following formula (7) with winding temperature rising value Δ T.
ΔT＝k·RMS＾2＋c···(7)
Therefore, prevention secure device 7 utilizes the operational ton that is in so predetermined correlationship and the character of quantity of state, unusually monitoring, detecting the attendant equipment 2 of motor 1 and described motor.The structure of this prevention secure device 7 as shown in Figure 3.Prevention secure device 7 comprises model reservoir 7a, model state amount calculating section 7b, comparing section 7c and informing portion 7d.
At first, when the attendant equipment 2 (air-cooler) of motor 1 and motor ran well, during certain hour, the many groups of collection operational tons were that RMS and the quantity of state of load factor is the data of winding temperature rising value Δ T.Next, based on the data of collecting, such as known regression analysis such as use least square methods, calculate coefficient k and the intercept c of formula (7), obtain the regression equation that the form with formula (7) represents, generate the correlation model that the operational ton under the normal condition and state the relationship between quantities have been carried out modeling.
Then, the operational ton (RMS of load factor) of like this generation and the correlation model of quantity of state (winding temperature rising value Δ T) are stored in model reservoir 7a.Fig. 4 illustrate the correlation model that is stored in advance model reservoir 7a load factor RMS square with an example of the relation of winding temperature rising value Δ T.
In attendant equipment 2 runnings of motor 1 and motor, prevention secure device 7 regularly obtains operational ton and quantity of state.And, the correlation model that the included model state amount calculating section 7b of prevention secure device 7 store by the on-stream operational ton that obtains being applied to model reservoir 7a is if calculate the quantity of state that can get normally the time from the attendant equipment 2 of the motor 1 of correlation model anticipation and motor (below be called the model state amount).
With words as an example of the RMS of load factor and winding temperature rising value Δ T example so far, the RMS of the load factor in prevention secure device 7 is calculated during certain in attendant equipment 2 running of motor 1 and motor square, model state amount calculating section 7b calculates the winding temperature rising value Δ T of model state amount by square substitution formula (7) with this RMS.
The actual quantity of state that detects compares in the model state amount that the included comparing section 7c of prevention secure device 7 will be calculated by model state amount calculating section 7b and the running, the on-stream actual quantity of state that detects departs from the situation more than the predetermined benchmark with respect to the model state amount, and the attendant equipment 2 that detects at motor 1, motor has produced unusually.
With reference to Fig. 5 this abnormality detection judgement is described.In Fig. 5, the 10th, by the correlation model of regression equation (7) expression.And, comparing with the straight line of this correlation model 10 to the positive side of the Δ T axle predetermined benchmark of being separated by, set abnormality detection and judge employed threshold value 11.And the on-stream actual quantity of state that detects is that the attendant equipment 2 that detects at motor 1, motor has produced unusually in the situation (check point 12) of this threshold value more than 11.
In addition, herein, threshold value 11 is set in compares upward the side predetermined benchmark of being separated by with the straight line of correlation model 10, set as threshold value 11 but also the straight line of correlation model 10 can be amplified with predetermined multiplying power (for example 1.5 times) to the positive dirction of Δ T axle.
The informing portion 7d of prevention secure device 7 is being compared model state amount and actual quantity of state by comparing section 7c, and the attendant equipment 2 that detects at motor 1, motor has produced in the unusual situation, informs this content to maintenance person etc.As the form of informing of utilizing this informing portion 7d, for example may be displayed on the display frame of prevention secure device 7, also can make the rings such as hummer, sound move to inform.
In the prevention secure device of the motor that consists of like this, generate in advance the correlation model that the attendant equipment 2 of motor 1 and motor has been carried out modeling for the operational ton under the normal condition and state the relationship between quantities.And, in the running of the attendant equipment 2 of motor 1 and motor, by the model state amount on the correlation model and actual quantity of state are compared, detect attendant equipment 2 unusual of motor 1 and motor.
, generally carry out in the situation of unusual detection at the quantity of state of wanting to change based on the variation according to operational ton herein, by the value according to the operational ton in the running quantity of state of the benchmark that becomes abnormality detection is changed, can carry out more accurately abnormality detection.Yet the operational ton of data that is carried out sampling under the normal condition is not necessarily consistent with the operational ton of reality in the running.So, under normal condition, be carried out in the inconsistent situation of operational ton of reality in operational ton and the running of data of sampling, can produce the such problem of reference value of not knowing how to set abnormality detection.
For such problem, in the prevention secure device of motor involved in the present invention, owing to use the correlation model that the operational ton under the normal condition and state the relationship between quantities have been carried out modeling, set the quantity of state of the benchmark that becomes abnormality detection, therefore can set suitable reference value according to the operational ton of reality, can realize the abnormality detection that precision is higher.
In addition, the operational ton during from required normal of the setting of reference value, the data volume of quantity of state, in the situation of not using correlation model, in order to improve the abnormality detection precision, the setting of reference value need to have more data volume.And relative with it, in the situation of using correlation model, generate the data volume that obtains necessarily above relevant correlation model aequum to get final product, that is, can realize with data volume still less the abnormality detection that precision is higher.
And for example for the air-cooler, the cooling water pipe that air-cooler is included is because long-term use meeting is attached with dirt in pipe inside for the attendant equipment 2 of motor, and pipeline can slowly be stopped up sometimes.Because this obstruction can make the refrigerating function of air-cooler descend, and therefore finally might cause the fault of motor.Yet, direct-detection go out such cooling water pipe the air-coolers such as obstruction be very difficult unusually.
But, if because the obstruction of such cooling water pipe etc. descend the refrigerating function of air-cooler, then compare when normal, even identical load factor (operational ton), winding temperature rising value Δ T (quantity of state) also can increase.Therefore, by detecting departing from of model state amount the correlation model of actual quantity of state when normal, just can indirect detection go out such motor attendant equipment 2 unusually.
And in addition, because such deteriorated unusual time till find of following that slowly occurs along with the time such as the obstruction of the cooling water pipe of air-cooler is long, so its detection is very difficult.But, set the benchmark of abnormality detection by the correlation model when normal, owing to can improve the precision of abnormality detection, even therefore so long-term slowly occur deteriorated also can detect.
The prevention secure device of the motor that consists of as mentioned above comprises: the quantity of state acquiring unit is resistance temperature detector, obtains the quantity of state that is in the motor of predetermined correlationship with the operational ton of the input from motor drive to motor; The model storage element stores correlation model in advance, and described correlation model is according to correlationship, and modeling forms under normal circumstances operational ton and state the relationship between quantities carry out to the attendant equipment of motor and motor; The model state amount is calculated the unit, the quantity of state of the operational ton when calculating in the correlation model of model storage unit stores with respect to motor operation; And the abnormality detection unit is comparing section, the quantity of state that is obtained by the quantity of state acquiring unit by with described running the time with calculate the quantity of state of calculating the unit by the model state amount and compare, detect attendant equipment unusual of motor and motor.
Therefore, can improve the abnormality detection precision of motor, the prevention of motor that can comprise anomaly monitoring, the detection of the attendant equipment of attached motor is saved from damage, can accurately judge attendant equipment deteriorated of motor.In addition, owing to can learn in advance the sign of fault of the attendant equipment of motor, suitably implement to maintain accordingly with its symptom, therefore can prevent to affect the catastrophic failure of the motor of whole plant operation.
Fig. 6 is the block diagram that the functional structure of the related prevention secure device of embodiments of the present invention 2 is shown.
The embodiment 2 of explanation is based on the structure of above-mentioned embodiment 1 herein, considered quantity of state with motor have beyond the operational ton of predetermined correlationship, bring the key element of impact to this quantity of state, thereby calculate the model state amount.
Below, same with embodiment 1, as an example, the RMS of applicable load factor is described as operational ton, use winding temperature rising value Δ T as the situation of quantity of state.Quantity of state is winding temperature rising value Δ T except operational ton is load factor (RMS), for example also can be that the air quantity of the temperature of chilled water of oil-to-water heat exchanger 2b of air-cooler and flow, cooling fan 2a changes according to the attendant equipment 2 of motor.
Exemplifying concrete numerical value illustrates, for example under the identical prerequisite of other operating conditions, being that 20 rising value of winding temperature when spending Δ T are 30 degree in the temperature of chilled water, is that 25 rising value of winding temperature when spending Δ T are in the situations of 32 degree at cooling water temperature, be+2 to spend about the correcting value of cooling water temperature.By like this, respectively according to operating condition estimate correcting value about cooling water temperature, about the correcting value of cooling water flow, about the correcting value of air quantity of fan.
Then, with these correcting values respectively as α 1, α 2, α 3, with these correcting values as the regression equation of the correlation model of correction term substitution as shown in the formula (8).
ΔT＝k·RMS＾2＋c＋α1＋α2＋α3···(8)
The prevention secure device 7 of present embodiment 2 uses the regression equation with the such correction term of this formula (8) in the employed model state amount of the setting of the reference value of calculating abnormality detection.That is, prevention secure device 7 except model reservoir 7a, model state amount calculating section 7b, comparing section 7c and informing portion 7d, also comprises correcting value reservoir 7e as shown in Figure 6.
The in advance impact that brings to quantity of state of the key element beyond the store operation amount of this correcting value reservoir 7e (namely, the variable quantity of the quantity of state that brings of operational ton key element in addition) is as correcting value.The correlation model that model reservoir 7a stores is the form that does not comprise correction term as the formula (7) of enforcement mode 1.And model state amount calculating section 7b is when the model state amount of the correlation model of calculating model reservoir 7a storage, and the correcting value that stores by adding correcting value reservoir 7e is calculated the model state amount according to formula (8).
Like this, in calculating the model state amount, by the relevant part from expression operational ton and quantity of state, isolating the operational ton key element that affects quantity of state in addition processes as correction term, the generation of correlation model, use the formalities such as abnormality detection of the model state amount of calculating can be same with embodiment 1, considered the abnormality detection of the key element that affects quantity of state beyond the operational ton.
In addition, other structures and embodiment 1 are same, and description is omitted.
The prevention secure device of the motor that consists of as mentioned above is except the structure of embodiment 1, comprise that also the variable quantity of the quantity of state that the key element beyond the store operation amount is in advance brought is as the correcting value reservoir of correcting value, model state amount calculating section is added the correcting value that the correcting value reservoir stores, the quantity of state of the operational ton when calculating in the correlation model that the model reservoir stores with respect to motor operation.
Therefore, except can obtain with the same effect of embodiment 1, can not use multiple regression analysis just to consider will usually proofread and correct correlation model beyond the operational ton, can process without the data of complexity and just further improve the abnormality detection precision.
Fig. 7 is the block diagram that the functional structure of the related prevention secure device of embodiments of the present invention 3 is shown.
The embodiment 3 of explanation is based on the structure of above-mentioned embodiment 1 herein, for the model state amount number of times that the actual quantity of state that detects in the running departs from more than the predetermined benchmark is counted, this number of times in during certain is in the situation more than the predetermined number of times, and the attendant equipment that detects as motor, motor produces unusual.
The prevention secure device 7 of present embodiment 3 except model reservoir 7a, model state amount calculating section 7b, comparing section 7c and informing portion 7d, also comprises count section 7f as shown in Figure 6.Whether comparing section 7c compares the actual quantity of state that detects in the model state amount calculated by model state amount calculating section 7b and the running, judge for the on-stream actual quantity of state that detects of model state amount and depart from more than the predetermined benchmark.
Informing portion 7d and embodiment 1 are same, have produced in the unusual situation at the attendant equipment 2 that detects as motor 1, motor, utilize picture disply, sound etc. to inform to maintenance person etc. its content.In addition, also can utilize comparing section 7c to record herein to be judged to be actual quantity of state for the model state amount and depart from moment more than the predetermined benchmark, when informing with this informing portion 7d, utilize picture disply etc. to make maintenance person learn this moment, number of times.
The prevention secure device of the motor that consists of as mentioned above is based on the structure of embodiment 1, the quantity of state that is obtained by the quantity of state acquiring unit in the running departs from number of times more than the predetermined datum quantity with respect to the quantity of state of being calculated by model state amount calculating section, in during certain in the situation more than the predetermined number of times, the abnormality detection unit be comparing section and the count section attendant equipment that detects motor and motor unusually.
Therefore, except can obtain with the same effect of embodiment 1, also suppress to produce unusual error detection and realize quick and high-precision abnormality detection, can also learn the suitable period of maintenance inspection.
Claims (3)
1. the prevention secure device of a motor is based on the prevention secure device of the motor that moves from the operational ton of motor drive input, and the prevention secure device of this motor is characterised in that, comprising:
The quantity of state acquiring unit, this quantity of state acquiring unit obtains the quantity of state that is in the described motor of predetermined correlationship with described operational ton;
The model storage element, this model storage element stores correlation model in advance, described correlation model is according to described correlationship, and modeling forms under normal circumstances described operational ton and described state the relationship between quantities carry out with the attendant equipment of described motor and described motor;
The model state amount is calculated the unit, and this model state amount is calculated the quantity of state of the described operational ton of unit when calculating in the described correlation model of described model storage unit stores with respect to described motor operation; And
The abnormality detection unit, this abnormality detection unit by described quantity of state that described when running obtained by described quantity of state acquiring unit with calculate the described quantity of state of calculating the unit by described model state amount and compare, detect attendant equipment unusual of described motor and described motor.
2. the prevention secure device of motor as claimed in claim 1 is characterized in that,
Comprise the correcting value storage element, this correcting value storage element stores the variable quantity of the described quantity of state that the key element beyond the described operational ton brings in advance as correcting value,
Described model state amount is calculated the described correcting value that the unit adds described correcting value storage unit stores, the quantity of state of the described operational ton when calculating in the described correlation model of described model storage unit stores with respect to described motor operation.
3. the prevention secure device of motor as claimed in claim 1 or 2 is characterized in that,
The described quantity of state that is obtained by described quantity of state acquiring unit in described when running departs from number of times more than the predetermined datum quantity with respect to calculated the described quantity of state of calculating the unit by described model state amount, in during certain in the situation more than the predetermined number of times, described abnormality detection unit inspection go out described motor and described motor attendant equipment unusually.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012-091866 | 2012-04-13 | ||
| JP2012091866A JP2013223284A (en) | 2012-04-13 | 2012-04-13 | Preventive maintenance device for motor |
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| CN103376410A true CN103376410A (en) | 2013-10-30 |
| CN103376410B CN103376410B (en) | 2015-11-18 |
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| JP (1) | JP2013223284A (en) |
| KR (1) | KR101332113B1 (en) |
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| WO2018103863A1 (en) * | 2016-12-09 | 2018-06-14 | Siemens Aktiengesellschaft | Method for operating an electric rotating machine, in particular a turbo generator |
| KR20170002137U (en) | 2017-04-05 | 2017-06-16 | 김홍섭 | Apparatus for checking activity state of motor using piezo-electric vibration sensor |
| KR101858951B1 (en) * | 2018-02-01 | 2018-05-17 | 주식회사 프로웰 | The measurement motor monitoring control apparatus and monitoring control method thereof |
| KR20180003196U (en) | 2018-08-16 | 2018-11-09 | 김홍섭 | Device for measuring vibration frequency of motor |
| JP7434838B2 (en) | 2019-11-26 | 2024-02-21 | 富士電機機器制御株式会社 | Diagnostic equipment, distribution boards, control panels, diagnostic methods and machine diagnostic programs |
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| Publication number | Publication date |
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| KR101332113B1 (en) | 2013-11-21 |
| JP2013223284A (en) | 2013-10-28 |
| KR20130115977A (en) | 2013-10-22 |
| CN103376410B (en) | 2015-11-18 |
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