CN104118782A - Elevator frequency converter bus capacitor capacity detection method and system and diagnosis early warning method and system - Google Patents
Elevator frequency converter bus capacitor capacity detection method and system and diagnosis early warning method and system Download PDFInfo
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- CN104118782A CN104118782A CN201410324056.2A CN201410324056A CN104118782A CN 104118782 A CN104118782 A CN 104118782A CN 201410324056 A CN201410324056 A CN 201410324056A CN 104118782 A CN104118782 A CN 104118782A
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Abstract
The invention provides an elevator frequency converter bus capacitor capacity detection method and system and a diagnosis early warning method and system. The detection method comprises the steps of controlling an elevator to ascend on floors in a no-load mode, wherein the number of ascending floors is at least the minimum number of floors reaching the nominal speed of the elevator; obtaining the capacitor voltage data u1 and u2 of a frequency converter bus capacitor at the moment t1 and the moment t2 in the ascending period of the elevator; detecting the car movement distance data h1 and h2 at the moment t1 and the moment t2 in the ascending process of the elevator; calculating the capacitor capacity C of the frequency converter bus capacitor according to the following formula: C=[2*k*m*g*(h2-h1)*eta-2*P*(t2-t1)]/(u2<2>-u1<2>). The technical scheme can be applied to frequency convertor products of existing hardware systems of elevators, and low-cost and accurate detection on the capacity of the frequency converter bus capacitor can be achieved without additionally arranging any hardware. Meanwhile, according to the diagnosis early warning method and system achieved based on the elevator frequency converter bus capacitor capacity detection method and system, low-cost and accurate diagnosis early warning on the capacity of the frequency converter bus capacitor can be achieved, and maintenance, detection and replacement are convenient.
Description
Technical field
The present invention relates to elevator technology field, particularly relate to a kind of elevator frequency converter bus capacitor capacity check and diagnosis method for early warning and system.
Background technology
In elevator device, rectifying and wave-filtering link at frequency converter, the use of large capacity alminium electrolytic condenser is very frequent, but alminium electrolytic condenser in use capacity can change, after capacity loss, tend to cause properties of product to decline, when capacity loss can accelerate decay until lost efficacy to electric capacity after certain numerical value.Therefore be necessary capacitance to detect, and need to diagnose capacitance, when finding that it declines to a great extent, provide alert, and then change when elevator maintain and protection, avoid condenser failure to cause phenomenon of the failure.
At present, on-the-spot being difficult to of elevator operation, directly frequency converter bus capacitor capacity is measured, the measuring ability of capacitance is not substantially all set in existing elevator frequency converter product, and for the detection technique of capacitance, in photovoltaic product, have by be connected in series current sensor in bus capacitor loop and detect the electric current that flows through electric capacity, according to the mode of Detection capacitance electric current and voltage, calculate again the method for electric capacity, but this utilization detects the sensor of bus capacitor electric current, hardware cost is higher, and in frequency converter product, also lack the sensor that detects bus capacitor electric current, therefore this technology is also difficult in elevator device elevator frequency converter bus capacitor capacity check and diagnosis early warning.
Summary of the invention
Based on this, being necessary for above-mentioned, to the technical matters existing in elevator frequency converter bus capacitor capacity check, provides a kind of elevator frequency converter bus capacitor capacity check method and system.
An elevator frequency converter bus capacitor capacity check method, comprises the steps:
Control elevator up in floor zero load, the operation number of plies is at least the minimum number of plies that can reach rated speed of lift;
Obtain the t of elevator during up
1and t
2the capacitance voltage data u of moment frequency converter bus capacitor
1and u
2;
Detect t in ascending for elevator process
1and t
2moment cab moving distance data h
1and h
2;
According to following formula, calculate the capacitance C of frequency converter bus capacitor;
C＝[2*k*m*g*(h
2-h
1)*η-2*P*(t
2-t
1)]/(u
2 2-u
1 2)
In formula, C is capacitance, and k is balance coefficient of elevator, and η is elevator efficiency, and P is frequency converter stand-by power consumption, and g is acceleration due to gravity, and m is elevator payload ratings.
An elevator frequency converter bus capacitor capacity check system, comprising:
The first elevator operation control module, up in floor zero load for controlling elevator, the operation number of plies is at least the minimum number of plies that can reach rated speed of lift;
The first capacitance voltage detection module, for obtaining the t of elevator during up
1and t
2the capacitance voltage data u of moment frequency converter bus capacitor
1and u
2;
The first cab miles of relative movement detection module, for detection of t in ascending for elevator process
1and t
2moment cab moving distance data h
1and h
2;
The first data processing module, for calculating the capacitance C of frequency converter bus capacitor according to following formula;
C＝[2*k*m*g*(h
2-h
1)*η-2*P*(t
2-t
1)]/(u
2 2-u
1 2)
In formula, C is capacitance, and k is balance coefficient of elevator, and η is elevator efficiency, and P is frequency converter stand-by power consumption, and g is acceleration due to gravity, and m is elevator payload ratings.
Above-mentioned elevator frequency converter bus capacitor capacity check method and system, by controlling elevator fixedly floor zero load is up, obtains capacitance voltage data and the cab moving distance data of the frequency converter bus capacitor of elevator during up; Utilize the potential energy change of elevator cage and the relation between the energy storage of electric capacity and the loss of the standby consumption of frequency converter and system, determine the capacitance of frequency converter bus capacitor.This scheme can be applied on the frequency converter product of elevator existing hardware system, without increasing any hardware, can realize, accurately detection low-cost to elevator frequency converter bus capacitor capacity.
In addition, be necessary, for the above-mentioned technical matters existing in early warning that elevator frequency converter bus capacitor capacity is diagnosed, to provide a kind of elevator frequency converter bus capacitor capacity diagnosis method for early warning and system.
An elevator frequency converter bus capacitor capacity diagnosis method for early warning, comprises the steps:
Control elevator up in floor zero load, the operation number of plies is at least the minimum number of plies that can reach rated speed of lift;
Obtain the t of elevator during up
1and t
2the capacitance voltage data u of moment frequency converter bus capacitor
1and u
2;
Corresponding motor current value A when detecting elevator and reaching described command speed;
Detect t in ascending for elevator process
1and t
2moment cab moving distance data h
1and h
2;
According to following formula, calculate the capacitance C of frequency converter bus capacitor, and according to two groups of motor current value A and capacitance C, frequency converter bus capacitor is diagnosed to early warning;
C＝[2*k*m*g*(h
2-h
1)*η-2*P*(t
2-t
1)]/(u
2 2-u
1 2)；
In formula, C is capacitance, and k is balance coefficient of elevator, and η is elevator efficiency, and P is frequency converter stand-by power consumption, and g is acceleration due to gravity, and m is elevator payload ratings.
An elevator frequency converter bus capacitor capacity diagnosis forewarn system, comprising:
The second elevator operation control module, up in floor zero load for controlling elevator, the operation number of plies is at least the minimum number of plies that can reach rated speed of lift;
The second capacitance voltage detection module, for obtaining the t of elevator during up
1and t
2the capacitance voltage data u of moment frequency converter bus capacitor
1and u
2;
The second current of electric detection module, corresponding motor current value A while reaching described command speed for detection of elevator;
The second cab miles of relative movement detection module, for detection of t in ascending for elevator process
1and t
2moment cab moving distance data h
1and h
2;
The second data processing module, for calculating the capacitance C of frequency converter bus capacitor according to following formula, and diagnoses early warning according to two groups of motor current value A and capacitance C to frequency converter bus capacitor;
C＝[2*k*m*g*(h
2-h
1)*η-2*P*(t
2-t
1)]/(u
2 2-u
1 2)；
In formula, C is capacitance, and k is balance coefficient of elevator, and η is elevator efficiency, and P is frequency converter stand-by power consumption, and g is acceleration due to gravity, and m is elevator payload ratings.
Above-mentioned elevator frequency converter bus capacitor capacity diagnosis method for early warning and system, up in floor zero load by controlling elevator, capacitance voltage data, the elevator that obtains the frequency converter bus capacitor of elevator during up corresponding motor current value and cab moving distance data while reaching command speed; Utilize the potential energy change of elevator cage and the relation between the energy storage of electric capacity and the loss of the standby consumption of frequency converter and system, determine the capacitance of frequency converter bus capacitor, then realize frequency converter bus capacitor is diagnosed to early warning by two groups of motor current values and capacitance.This scheme can be utilized on the frequency converter product of the existing hardware system of elevator, without increasing any hardware, can realize low to elevator frequency converter bus capacitor Capacity Cost, diagnose early warning accurately, facilitate repair and maintenance to detect and change.
Accompanying drawing explanation
Fig. 1 is elevator frequency converter bus capacitor capacity check method flow diagram of the present invention;
Fig. 2 is elevator frequency converter bus capacitor capacity check system architecture schematic diagram of the present invention;
Fig. 3 is elevator frequency converter bus capacitor capacity diagnosis method for early warning diagram of circuit of the present invention;
Fig. 4 is the capacitance voltage of frequency converter bus capacitor and the sequential chart that elevator cage moving distance data gathers;
Fig. 5 is the record data comparison diagram of circuit of an application example;
Fig. 6 is elevator frequency converter bus capacitor capacity diagnosis forewarn system structural representation of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing, the specific embodiment of elevator frequency converter bus capacitor capacity check method and system of the present invention is described in detail.
Shown in figure 1, Fig. 1 is elevator frequency converter bus capacitor capacity check method flow diagram of the present invention, comprises the steps:
Step S101, controls elevator up in floor zero load, and the operation number of plies is at least the minimum number of plies that can reach rated speed of lift.
In this step, can, when elevator every day does not move, control elevator in the minimum number of plies of the unloaded up arrival command speed of fixing intermediate floor.
Step S102, obtains the t of elevator during up
1and t
2the capacitance voltage data u of moment frequency converter bus capacitor
1and u
2.
In this step, can be before the up braking resistor work in service of elevator no-load, record up during two capacitance voltage data of frequency converter bus capacitors constantly.
Step S103, detects t in ascending for elevator process
1and t
2moment cab moving distance data h
1and h
2.
In this step, elevator start unloaded up after, record aforementioned two elevator cage moving distance datas constantly during up.
Step S104, according to the capacitance C of following formula calculating frequency converter bus capacitor;
C＝[2*k*m*g*(h
2-h
1)*η-2*P*(t
2-t
1)]/(u
2 2-u
1 2)
In formula, C is capacitance, and k is balance coefficient of elevator, and η is elevator efficiency, and P is frequency converter stand-by power consumption, and g is acceleration due to gravity, and m is elevator payload ratings, and symbol " * " represents to multiply each other.
In one embodiment, described k*m=m2-m1, m
1for the weight of elevator cage, m
2weight for Elevator weight sensor.
In addition, elevator device efficiency when low cruise is lower, so η can get 10%.The idling consumption of frequency converter generally, in 10W left and right, can be got 10W and calculate.
Shown in figure 2, Fig. 2 is elevator frequency converter bus capacitor capacity check system architecture schematic diagram of the present invention, comprising:
The first elevator operation control module, up in floor zero load for controlling elevator;
The first capacitance voltage detection module, for obtaining the t of elevator during up
1and t
2the capacitance voltage data u of moment frequency converter bus capacitor
1and u
2;
The first cab miles of relative movement detection module, for detection of t in ascending for elevator process
1and t
2moment cab moving distance data h
1and h
2;
The first data processing module, for calculating the capacitance C of frequency converter bus capacitor according to following formula;
C＝[2*k*m*g*(h
2-h
1)*η-2*P*(t
2-t
1)]/(u
2 2-u
1 2)
In formula, C is capacitance, and k is balance coefficient of elevator, and η is elevator efficiency, and P is frequency converter stand-by power consumption, and g is acceleration due to gravity, and m is elevator payload ratings.
In one embodiment, described k*m=m2-m1, m
1for the weight of elevator cage, m
2for the weight of Elevator weight sensor, η=10%, P=10W.
Elevator frequency converter bus capacitor capacity check system of the present invention is corresponding one by one with elevator frequency converter bus capacitor capacity check method of the present invention, technical characterictic and the beneficial effect thereof of at the embodiment of above-mentioned elevator frequency converter bus capacitor capacity check method, setting forth are all applicable in the embodiment of elevator frequency converter bus capacitor capacity check system, hereby statement.
The elevator frequency converter bus capacitor capacity check method and system of comprehensive above-described embodiment, up in floor zero load by controlling elevator, obtain capacitance voltage data and the cab moving distance data of the frequency converter bus capacitor of elevator during up; Utilize the potential energy change of elevator cage and the relation between the energy storage of electric capacity and the loss of the standby consumption of frequency converter and system, determine the capacitance of frequency converter bus capacitor.This scheme can be utilized on the frequency converter product of the existing hardware system of elevator, without increasing any hardware, can realize low to elevator frequency converter bus capacitor Capacity Cost, detect accurately, scheme is easy to realize, and suitablely generally applies.
Below in conjunction with accompanying drawing, the specific embodiment of elevator frequency converter bus capacitor capacity diagnosis method for early warning of the present invention and system is described in detail.
Shown in figure 3, Fig. 3 is elevator frequency converter bus capacitor capacity diagnosis method for early warning diagram of circuit of the present invention, comprises the steps:
Step S201, controls elevator up in floor zero load, and the operation number of plies is at least the minimum number of plies that can reach rated speed of lift.
In this step, can, when elevator every day does not move, control elevator in the minimum number of plies of the unloaded up arrival command speed of fixing intermediate floor.
Step S202, obtains the t of elevator during up
1and t
2the capacitance voltage data u of moment frequency converter bus capacitor
1and u
2.
In this step, can be before the up braking resistor work in service of elevator no-load, record up during two capacitance voltage data of frequency converter bus capacitors constantly.
Shown in figure 4, Fig. 4 is the capacitance voltage of frequency converter bus capacitor and the sequential chart that elevator cage moving distance data gathers, and in figure, longitudinal axis U is voltage, and H is distance, and transverse axis T is the time, during ascending for elevator, records t
1and t
2the capacitance voltage data u that the moment is corresponding
1and u
2.
Step S203, corresponding motor current value A when detecting elevator and reaching described command speed.
In this step, be during ascending for elevator, corresponding motor current value when recording elevator and reaching unloaded command speed.
Step S204, detects t in ascending for elevator process
1and t
2moment cab moving distance data h
1and h
2.
In this step, elevator start unloaded up after, record aforementioned two elevator cage moving distance datas constantly during up.
As shown in Figure 4, during ascending for elevator, record t
1and t
2the cab moving distance data h that the moment is corresponding
1and h
2.
Step S205, calculates the capacitance C of frequency converter bus capacitor, and according to two groups of motor current value A and capacitance C, frequency converter bus capacitor is diagnosed to early warning according to following formula;
C＝[2*k*m*g*(h
2-h
1)*η-2*P*(t
2-t
1)]/(u
2 2-u
1 2)；
In formula, C is capacitance, and k is balance coefficient of elevator, and η is elevator efficiency, and P is frequency converter stand-by power consumption, and g is acceleration due to gravity, and m is elevator payload ratings.
In this step, be mainly utilize each ascending for elevator detect in the capacitance data of the motor current value of record and the frequency converter bus capacitor of calculating carry out corresponding diagnosis judgement, thereby make early warning accurately.
In one embodiment, described k*m=m2-m1, m
1for the weight of elevator cage, m
2for the weight of Elevator weight sensor, η=10%, P=10W.
In one embodiment, in step S205, frequency converter bus capacitor is diagnosed the method for early warning, can be comprised as follows:
Obtain two groups of motor current value A
1, A
2with capacitance C
1, C
2, wherein, A
1, C
1be first group of motor current value and capacitance, A2, C2 are second group of motor current value and capacitance;
If ︱ A1-A2 ︱/MIN (A1, A2) is less than the first threshold values, and ︱ C1-C2 ︱/MIN (C1, C2) is greater than the second threshold values, carries out capacity abnormity early warning.
Generally, described the first threshold values can be got 5%, the second threshold values and can get 30%.Here current error gets 5% as a reference, is mainly in order to guarantee that participating in two groups of data is relatively to draw under same load and operating mode, thereby makes the variation of follow-up relatively capacitance more objective and accurate.
For the scheme of more clear elevator frequency converter bus capacitor capacity diagnosis method for early warning of the present invention, below in conjunction with accompanying drawing, set forth detailed applications example.
First, every day is twice capacitance of continuous detecting under same operating mode, records elevator at every turn simultaneously and run to the at the uniform velocity motor current value of section while calculating capacitance, and the motor current value of twice record and capacitance are averaged as the data reservation on the same day.Will store like this two-dimensional array of one group of motor current value and capacitance every day.Utilize the CPU (central process unit) of elevator device by the processing of comparing in the record data of every day, if find that the motor current value gap of any two groups of data is in 5%, and corresponding capacitance gap reaches 30% when above, points out capacitance abnormal failure.
Shown in figure 5, Fig. 5 is the record data comparison diagram of circuit of an application example, mainly comprises the steps:
Step S501, reads the data of two groups of storages; Wherein, A
1the first motor current value, C
1it is the first capacitance; A
2the second motor current value, C
2it is the second capacitance;
Step S502, judgement ︱ A
1-A
2︱/MIN (A
1, A
2) whether be less than 5%, if so, perform step S503, otherwise return to step S501;
Step S503, judgement ︱ C
1-C
2︱/MIN (C
1, C
2) whether be greater than 30%, if so, perform step S504, otherwise execution step S505;
Step S504, it is complete whether the data that judge all storages read, and if so, finishes to judge flow process, otherwise return to step S501.
Step S505, enters capacitance abnormity early warning flow process.
Shown in figure 6, Fig. 6 is elevator frequency converter bus capacitor capacity diagnosis forewarn system structural representation of the present invention, comprising:
The second elevator operation control module, up in floor zero load for controlling elevator, the operation number of plies is at least the minimum number of plies that can reach rated speed of lift;
The second capacitance voltage detection module, for obtaining the t of elevator during up
1and t
2the capacitance voltage data u of moment frequency converter bus capacitor
1and u
2;
The second current of electric detection module, corresponding motor current value A while reaching described command speed for detection of elevator;
The second cab miles of relative movement detection module, for detection of t in ascending for elevator process
1and t
2moment cab moving distance data h
1and h
2;
The second data processing module, for calculating the capacitance C of frequency converter bus capacitor according to following formula, and diagnoses early warning according to two groups of motor current value A and capacitance C to frequency converter bus capacitor;
C＝[2*k*m*g*(h
2-h
1)*η-2*P*(t
2-t
1)]/(u
2 2-u
1 2)；
In formula, C is capacitance, and k is balance coefficient of elevator, and η is elevator efficiency, and P is frequency converter stand-by power consumption, and g is acceleration due to gravity, and m is elevator payload ratings.
In one embodiment, described k*m=m2-m1, m
1for the weight of elevator cage, m
2for the weight of Elevator weight sensor, η=10%, P=10W.
In one embodiment, the second data processing module, for frequency converter bus capacitor being diagnosed to the method for early warning, can comprise as follows:
Obtain two groups of motor current value A
1, A
2with capacitance C
1, C
2, wherein, A
1, C
1be first group of motor current value and capacitance, A2, C2 are second group of motor current value and capacitance;
If ︱ A1-A2 ︱/MIN (A1, A2) is less than the first threshold values, and ︱ C1-C2 ︱/MIN (C1, C2) is greater than the second threshold values, carries out capacity abnormity early warning.
In one embodiment, described the first threshold values is that 5%, the second threshold values is 30%.
Elevator frequency converter bus capacitor capacity diagnosis forewarn system of the present invention is corresponding one by one with elevator frequency converter bus capacitor capacity diagnosis forewarn system method of the present invention, the technical characterictic of setting forth at the embodiment of above-mentioned elevator frequency converter bus capacitor capacity diagnosis method for early warning and beneficial effect thereof are all applicable in the embodiment of elevator frequency converter bus capacitor capacity diagnosis forewarn system, statement hereby.
Elevator frequency converter bus capacitor capacity diagnosis method for early warning and the system of comprehensive above-described embodiment, up in floor zero load by controlling elevator, capacitance voltage data, the elevator that obtains the frequency converter bus capacitor of elevator during up corresponding motor current value and cab moving distance data while reaching command speed; Utilize the potential energy change of elevator cage and the relation between the energy storage of electric capacity and the loss of the standby consumption of frequency converter and system, determine the capacitance of frequency converter bus capacitor, then realize frequency converter bus capacitor is diagnosed to early warning by two groups of motor current values and capacitance.This scheme can be utilized on the frequency converter product of the existing hardware system of elevator, without increasing any hardware, can realize low to elevator frequency converter bus capacitor Capacity Cost, diagnose early warning accurately, facilitate repair and maintenance to detect and change, scheme is easy to realize, and suitablely generally applies.
The above embodiment has only expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (10)
1. an elevator frequency converter bus capacitor capacity check method, is characterized in that, comprises the steps:
Control elevator up in floor zero load, the operation number of plies is at least the minimum number of plies that can reach rated speed of lift;
Obtain the t of elevator during up
1and t
2the capacitance voltage data u of moment frequency converter bus capacitor
1and u
2;
Detect t in ascending for elevator process
1and t
2moment cab moving distance data h
1and h
2;
According to following formula, calculate the capacitance C of frequency converter bus capacitor;
C＝[2*k*m*g*(h
2-h
1)*η-2*P*(t
2-t
1)]/(u
2 2-u
1 2)
In formula, C is capacitance, and k is balance coefficient of elevator, and η is elevator efficiency, and P is frequency converter stand-by power consumption, and g is acceleration due to gravity, and m is elevator payload ratings.
2. elevator frequency converter bus capacitor capacity check method according to claim 1, is characterized in that described k*m=m2-m1, m
1for the weight of elevator cage, m
2for the weight of Elevator weight sensor, η=10%, P=10W.
3. an elevator frequency converter bus capacitor capacity diagnosis method for early warning, is characterized in that, comprises the steps:
Control elevator up in floor zero load, the operation number of plies is at least the minimum number of plies that can reach rated speed of lift;
Obtain the t of elevator during up
1and t
2the capacitance voltage data u of moment frequency converter bus capacitor
1and u
2;
Corresponding motor current value A when detecting elevator and reaching described command speed;
Detect t in ascending for elevator process
1and t
2moment cab moving distance data h
1and h
2;
According to following formula, calculate the capacitance C of frequency converter bus capacitor, and according to two groups of motor current value A and capacitance C, frequency converter bus capacitor is diagnosed to early warning;
C＝[2*k*m*g*(h
2-h
1)*η-2*P*(t
2-t
1)]/(u
2 2-u
1 2)；
In formula, C is capacitance, and k is balance coefficient of elevator, and η is elevator efficiency, and P is frequency converter stand-by power consumption, and g is acceleration due to gravity, and m is elevator payload ratings.
4. elevator frequency converter bus capacitor capacity diagnosis method for early warning according to claim 3, is characterized in that, according to two groups of motor current value A and capacitance C, to frequency converter bus capacitor, diagnoses the method for early warning to comprise:
Obtain two groups of motor current value A
1, A
2with capacitance C
1, C
2, wherein, A
1, C
1be first group of motor current value and capacitance, A2, C2 are second group of motor current value and capacitance;
If ︱ A1-A2 ︱/MIN (A1, A2) is less than the first threshold values, and ︱ C1-C2 ︱/MIN (C1, C2) is greater than the second threshold values, carries out capacity abnormity early warning.
5. elevator frequency converter bus capacitor capacity diagnosis method for early warning according to claim 4, is characterized in that, described the first threshold values is that 5%, the second threshold values is 30%.
6. an elevator frequency converter bus capacitor capacity check system, is characterized in that, comprising:
The first elevator operation control module, up in floor zero load for controlling elevator, the operation number of plies is at least the minimum number of plies that can reach rated speed of lift;
The first capacitance voltage detection module, for obtaining the t of elevator during up
1and t
2the capacitance voltage data u of moment frequency converter bus capacitor
1and u
2;
The first cab miles of relative movement detection module, for detection of t in ascending for elevator process
1and t
2moment cab moving distance data h
1and h
2;
The first data processing module, for calculating the capacitance C of frequency converter bus capacitor according to following formula;
C＝[2*k*m*g*(h
2-h
1)*η-2*P*(t
2-t
1)]/(u
2 2-u
1 2)
In formula, C is capacitance, and k is balance coefficient of elevator, and η is elevator efficiency, and P is frequency converter stand-by power consumption, and g is acceleration due to gravity, and m is elevator payload ratings.
7. elevator frequency converter bus capacitor capacity check system according to claim 1, is characterized in that described k*m=m2-m1, m
1for the weight of elevator cage, m
2for the weight of Elevator weight sensor, η=10%, P=10W.
8. an elevator frequency converter bus capacitor capacity diagnosis forewarn system, is characterized in that, comprising:
The second elevator operation control module, up in floor zero load for controlling elevator, the operation number of plies is at least the minimum number of plies that can reach rated speed of lift;
The second capacitance voltage detection module, for obtaining the t of elevator during up
1and t
2the capacitance voltage data u of moment frequency converter bus capacitor
1and u
2;
The second current of electric detection module, corresponding motor current value A while reaching described command speed for detection of elevator;
The second cab miles of relative movement detection module, for detection of t in ascending for elevator process
1and t
2moment cab moving distance data h
1and h
2;
The second data processing module, for calculating the capacitance C of frequency converter bus capacitor according to following formula, and diagnoses early warning according to two groups of motor current value A and capacitance C to frequency converter bus capacitor;
C＝[2*k*m*g*(h
2-h
1)*η-2*P*(t
2-t
1)]/(u
2 2-u
1 2)；
In formula, C is capacitance, and k is balance coefficient of elevator, and η is elevator efficiency, and P is frequency converter stand-by power consumption, and g is acceleration due to gravity, and m is elevator payload ratings.
9. elevator frequency converter bus capacitor capacity diagnosis forewarn system according to claim 8, is characterized in that, according to two groups of motor current value A and capacitance C, to frequency converter bus capacitor, diagnoses the method for early warning to comprise:
Obtain two groups of motor current value A
1, A
2with capacitance C
1, C
2, wherein, A
1, C
1be first group of motor current value and capacitance, A2, C2 are second group of motor current value and capacitance;
If ︱ A1-A2 ︱/MIN (A1, A2) is less than the first threshold values, and ︱ C1-C2 ︱/MIN (C1, C2) is greater than the second threshold values, carries out capacity abnormity early warning.
10. elevator frequency converter bus capacitor capacity diagnosis forewarn system according to claim 8, is characterized in that, described the first threshold values is that 5%, the second threshold values is 30%.
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|---|---|---|---|
| CN201410324056.2A CN104118782B (en) | 2014-07-08 | 2014-07-08 | Elevator variable frequency device bus capacitor capacity check and diagnosis method for early warning and system thereof |
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|---|---|---|---|
| CN201410324056.2A CN104118782B (en) | 2014-07-08 | 2014-07-08 | Elevator variable frequency device bus capacitor capacity check and diagnosis method for early warning and system thereof |
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| CN104118782B CN104118782B (en) | 2016-06-01 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106348116A (en) * | 2016-10-20 | 2017-01-25 | 大连欧意测量仪器有限公司 | Elevator balance coefficient detection method |
| CN109596923A (en) * | 2018-12-24 | 2019-04-09 | 日立电梯（中国）有限公司 | Frequency converter bus capacitor on-line measuring device, method and frequency converter |
| CN110114294A (en) * | 2016-12-26 | 2019-08-09 | 三菱电机株式会社 | Recovery system |
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| CN110114294A (en) * | 2016-12-26 | 2019-08-09 | 三菱电机株式会社 | Recovery system |
| CN110114294B (en) * | 2016-12-26 | 2020-11-03 | 三菱电机株式会社 | Recovery system |
| CN109596923A (en) * | 2018-12-24 | 2019-04-09 | 日立电梯（中国）有限公司 | Frequency converter bus capacitor on-line measuring device, method and frequency converter |
| CN109596923B (en) * | 2018-12-24 | 2021-07-16 | 日立电梯（中国）有限公司 | Online detection device and method for bus capacitor of frequency converter and frequency converter |
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|---|---|
| CN104118782B (en) | 2016-06-01 |
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