CN105204384A - Motor group operation monitoring method - Google Patents
Motor group operation monitoring method Download PDFInfo
- Publication number
- CN105204384A CN105204384A CN201510613118.6A CN201510613118A CN105204384A CN 105204384 A CN105204384 A CN 105204384A CN 201510613118 A CN201510613118 A CN 201510613118A CN 105204384 A CN105204384 A CN 105204384A
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- CN
- China
- Prior art keywords
- total current
- current
- motor
- downward gradient
- monitoring method
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Classifications
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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
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Control Of Electric Motors In General (AREA)
Abstract
The invention discloses a motor group operation monitoring method. The method comprises the steps that a total current of multiple motors is collected, a numerical value of the total current is converted into a 4-20-mA standard instrument signal through a current transducer, and then the signal is transmitted to a DCS; when one or more motors stop operation due to a fault, a downward gradient is certainly generated in the total current, and the rated current of the motor with the minimum power serves as the minimum downward gradient Imin; the DSC compares an obtained total current I with a total current I' obtained before t seconds every t seconds, and if a difference value of the total current I and the total current I' is larger than the minimum downward gradient Imin, that is I-I'> Imin, the DSC gives an alarm signal to remind that one motor stops operation due to the fault. According to the motor group operation monitoring method, the operation state of the multiple motors can be monitored, motor operation stopping is judged through changes of the total current, and therefore the method is very simple and practical; the current total current can be regularly compared with the total current before t seconds through the DCS, and meanwhile trend recording and flexible and varied alarm modes can be achieved.
Description
Technical field
The present invention relates to motor control technology field, specifically a kind of motor group operation and monitoring method.
Background technology
Current is the current of electric that will need to monitor to the usual way of motor operation monitoring, each all will introduce DCS control system by a D.C mutual-inductor and a current transducer, in order to reduce expenses, only important motor is just introduced under normal circumstances, secondary motor just have ignored, and particularly a large amount of low power motor is in the blind area of monitoring especially.These do not have monitored motor once jump car, and produce upper large fluctuation although can not cause, often cause technique slowly to worsen, energy consumption rises gradually, is only running up to a certain degree, just can be found, to produce bring very large passive.If all monitored, just need a large amount of cables and current transducer, DCS system also will provide receiving cable for each current of electric simultaneously, this just needs to increase fastener, if the electric current received is more, also may exceeds DCS system maximum-norm, cause DCS job insecurity.
Summary of the invention
The object of the invention is the defect in order to overcome prior art existence and deficiency, a kind of motor group operation and monitoring method is provided, just can realize the monitoring to a motor group by a D.C mutual-inductor and a current transducer.
Technical scheme of the present invention is as follows:
A kind of motor group operation and monitoring method, is characterized in that: specifically comprise the following steps:
(1), choosing a station power distribution cabinet is that the multiple electric motors simultaneously run is powered;
(2), the electric current gathered on power distribution cabinet inlet wire cable, namely gather the total current of multiple electric motors, by current transducer, total current numerical value converted to the standard meter signal of 4-20mA, and be delivered to DCS system;
(3), when have one or more motor because of fault out of service time, total current must have a downward gradient, wherein the rated current of the motor that power is minimum, is minimum downward gradient I
min;
(4), the total current I ' obtained before the total current I of acquisition and t second compared, if the difference of total current I and total current I ' is greater than minimum downward gradient I at interval of t second by DCS system
min, i.e. I-I ' >I
min, then DCS system sends alerting signal, prompting have motor because of fault out of service.
Described motor group operation and monitoring method, is characterized in that: described time interval t can carry out online modification second, is preferably 30 seconds.
Beneficial effect of the present invention:
The present invention can monitor the running status of multiple electric motors, judges that motor is stopped transport by the change of total current, very simple and practical; Total current before total current currency and t second can be compared (time interval t can carry out online modification) timing by DCS system, while also can realize trend record and flexile type of alarm.
Accompanying drawing explanation
Fig. 1 is the structural principle block diagram of equipment therefor of the present invention.
Embodiment
See Fig. 1, a kind of motor group operation and monitoring method, specifically comprises the following steps:
(1), choose a station power distribution cabinet is 1#, 2# of running simultaneously ... n# feeding electric motors;
(2), the electric current gathered on power distribution cabinet inlet wire cable, namely gather 1#, 2# ... the total current of n# motor, is converted to the standard meter signal of 4-20mA, and is delivered to DCS system by total current numerical value by current transducer;
(3), when have one or more motor because of fault out of service time, total current must have a downward gradient, wherein the rated current of the motor that power is minimum, is minimum downward gradient I
min;
(4), the DCS system total current I(I=I that will obtain at interval of t second
1+ I
2+ ... + In) with t second before the total current I ' that obtains compare, if the difference of total current I and total current I ' is greater than minimum downward gradient I
min, i.e. I-I ' >I
min, then DCS system sends alerting signal, prompting have motor because of fault out of service.
In the present invention, time interval t can carry out online modification second, is preferably 30 seconds.
Below in conjunction with accompanying drawing, the present invention is further illustrated:
The power supply of all motors is from same cable, be each feeding electric motors by same power distribution cabinet by different air switches, generally power is all little, if all mix current remote transmission signal for every platform motor, need to use a lot of cables and current transducer, cause the waste of material and expense.In the same way, be not only confined to motor, the operation monitoring of all electrical appliances on same power distribution cabinet can make in this way.From the angle of control accuracy, if voltage is 380V, minimum power is more preferably greater than 3KW; If voltage is 220V, minimum power more preferably greater than 1KW, to ensure that maximum current fluctuation is less than the minimum downward gradient of electric current.
By DCS system platform, by control program, realize every 30 seconds, the currency of total current and the total current value before 30 seconds being compared, if difference is greater than minimum downward gradient, just carry out sound and light alarm.
Total current must gather from the inlet wire cable of power distribution cabinet, then by current transducer, total current numerical value is converted to the instrument signal of 4-20mA, teletransmission is to DCS system, and show on operation microcomputer, once there is alerting signal, this signal must be sent by rest-set flip-flop, needs manual reset to confirm and ejects alert box.
Claims (2)
1. a motor group operation and monitoring method, is characterized in that: specifically comprise the following steps:
(1), choosing a station power distribution cabinet is that the multiple electric motors simultaneously run is powered;
(2), the electric current gathered on power distribution cabinet inlet wire cable, namely gather the total current of multiple electric motors, by current transducer, total current numerical value converted to the standard meter signal of 4-20mA, and be delivered to DCS system;
(3), when have one or more motor because of fault out of service time, total current must have a downward gradient, wherein the rated current of the motor that power is minimum, is minimum downward gradient I
min;
(4), the total current I ' obtained before the total current I of acquisition and t second compared, if the difference of total current I and total current I ' is greater than minimum downward gradient I at interval of t second by DCS system
min, i.e. I-I ' >I
min, then DCS system sends alerting signal, prompting have motor because of fault out of service.
2. motor group operation and monitoring method according to claim 1, is characterized in that: described time interval t can carry out online modification second, is preferably 30 seconds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510613118.6A CN105204384A (en) | 2015-09-23 | 2015-09-23 | Motor group operation monitoring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510613118.6A CN105204384A (en) | 2015-09-23 | 2015-09-23 | Motor group operation monitoring method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105204384A true CN105204384A (en) | 2015-12-30 |
Family
ID=54952129
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510613118.6A Pending CN105204384A (en) | 2015-09-23 | 2015-09-23 | Motor group operation monitoring method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105204384A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111092658A (en) * | 2019-12-30 | 2020-05-01 | 徐州中矿大传动与自动化有限公司 | Device and method for monitoring information of multi-motor cluster system |
| CN112269349A (en) * | 2020-10-12 | 2021-01-26 | 首钢京唐钢铁联合有限责任公司 | Method and system for detecting refined RH four-motor driven molten steel car |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2768304Y (en) * | 2004-10-28 | 2006-03-29 | 浙江轻纺职业技术学院 | Motor swarm controlling and starting device |
| CN1896896A (en) * | 2005-07-15 | 2007-01-17 | 韩红桥 | Monitoring system of machine tool |
| US20080211511A1 (en) * | 2007-01-26 | 2008-09-04 | Myongji University Industry And Academia Cooperation Foundation | Method of Generating Fault Indication in Feeder Remote Terminal Unit for Power Distribution Automation System |
| CN102111088A (en) * | 2010-11-24 | 2011-06-29 | 广东工业大学 | Photovoltaic power generation control system |
| CN103746872A (en) * | 2013-12-30 | 2014-04-23 | 马钢控制技术有限责任公司 | Power supply fault detection method of network machine room |
| CN203965912U (en) * | 2014-07-02 | 2014-11-26 | 株洲职业技术学院 | Factory's motor group real time monitoring apparatus based on CAN bus |
| CN204290478U (en) * | 2014-12-26 | 2015-04-22 | 大唐贵州发耳发电有限公司 | The fast cutting system of a kind of power supply monitored by DCS system |
-
2015
- 2015-09-23 CN CN201510613118.6A patent/CN105204384A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2768304Y (en) * | 2004-10-28 | 2006-03-29 | 浙江轻纺职业技术学院 | Motor swarm controlling and starting device |
| CN1896896A (en) * | 2005-07-15 | 2007-01-17 | 韩红桥 | Monitoring system of machine tool |
| US20080211511A1 (en) * | 2007-01-26 | 2008-09-04 | Myongji University Industry And Academia Cooperation Foundation | Method of Generating Fault Indication in Feeder Remote Terminal Unit for Power Distribution Automation System |
| CN102111088A (en) * | 2010-11-24 | 2011-06-29 | 广东工业大学 | Photovoltaic power generation control system |
| CN103746872A (en) * | 2013-12-30 | 2014-04-23 | 马钢控制技术有限责任公司 | Power supply fault detection method of network machine room |
| CN203965912U (en) * | 2014-07-02 | 2014-11-26 | 株洲职业技术学院 | Factory's motor group real time monitoring apparatus based on CAN bus |
| CN204290478U (en) * | 2014-12-26 | 2015-04-22 | 大唐贵州发耳发电有限公司 | The fast cutting system of a kind of power supply monitored by DCS system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111092658A (en) * | 2019-12-30 | 2020-05-01 | 徐州中矿大传动与自动化有限公司 | Device and method for monitoring information of multi-motor cluster system |
| CN112269349A (en) * | 2020-10-12 | 2021-01-26 | 首钢京唐钢铁联合有限责任公司 | Method and system for detecting refined RH four-motor driven molten steel car |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20151230 |