CN102237835A - Low-voltage motor restarting device - Google Patents
Low-voltage motor restarting device Download PDFInfo
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- CN102237835A CN102237835A CN2010101576180A CN201010157618A CN102237835A CN 102237835 A CN102237835 A CN 102237835A CN 2010101576180 A CN2010101576180 A CN 2010101576180A CN 201010157618 A CN201010157618 A CN 201010157618A CN 102237835 A CN102237835 A CN 102237835A
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Abstract
The invention discloses a low-voltage motor restarting device, which comprises a master central processing unit (CPU) control unit, a power unit, analogue quantity units, input units, output units and a display unit. Each unit adopts a modular design and independent detection and control ways. The power unit is connected with the other units, and supplies working power to the other units. A low-voltage motor restarting function and data transmission among the master CPU control unit, the analogue quantity units, the input units, the output units and the display unit are realized by a controller area network (CAN) bus. The device has the characteristics of high reliability, high real-time performance, wide application range, low cost and flexibility and convenience of operation and maintenance.
Description
Technical field
It is one that the present invention collects real-time measurement measurement, Based Intelligent Control, field bus communication, occurs in industrial production under the occasion of " rolling " or short time power down, can realize the device that the batch low voltage motor is reset automatically.Belong to Power System Intelligent control technology field.
Background technology
Existing low voltage motor restarting device mostly adopts the various protections of apportion arrangements of components and auxiliary relay, various electrical measurement table and signal lamp to wait to realize motor to restart controlled function; though such structure can realize the effect that motor is restarted; but such infrastructure cost is huge; system integration degree is low; inefficiency; can not realize the functional requirement that motor in enormous quantities is restarted well; simultaneously modern equipment control and accident analysis are brought very big inconvenience; intelligent degree is low, can not adapt to the developing direction of the modernization of industry.
Summary of the invention
The configuration of existing restarting device peripheral cell is numerous and diverse, efficient is poor in order to overcome in the present invention, the cost height, should not manage, and the deficiency that control mode is single designs a kind of intelligence, and is high efficiency, the low voltage motor restarting device of multi-mode control.Its technology is achieved in that and comprises host CPU control unit, power subsystem, opens into the structure of leaving unit and display unit, it is characterized in that: each unit adopts modularized design, independent detection and independent control mode; Power subsystem and host CPU control unit, analog quantity unit, open into the unit, leave unit and display unit and be connected and its working power is provided; Host CPU control unit, analog quantity unit, leave between unit and the display unit by the CAN bus and realize transfer of data between each unit; Except that the power module unit, host CPU control unit, analog quantity unit, open into the unit, leave the unit and display unit has all adopted high-performance CPU intelligent controller, wherein the CPU of host CPU control unit is the high-performance embedded ARM9 processor of low-power consumption, this unit has the RS485 interface simultaneously, be used to connect the terminal unit of intelligent MCC or DCS in factory system and so on, remaining element has all adopted the STM32 processor; Power subsystem has adopted the AC-DC switch power supply of wide region input, has redundancy feature between the power subsystem;
This device data processing and function implementation procedure are:
(1) high-speed sampling is directly realized to the input analog signal in the analog quantity unit, and bus current, voltage are directly monitored in three-phase current, three-phase voltage input, becomes in the middle of minimizing is more and send link, can detect voltage or current fluctuation less than 20ms.The analog quantity unit carries out analog-to-digital conversion with alternating current, the voltage signal that samples, and real time data is uploaded to fieldbus (CAN bus); This unit has the record wave energy simultaneously, and when " rolling " or short time power down occurring, ripple is recorded in the analog quantity unit, and bus current, voltage data in " rolling " process are stored; Its unit module is connected with the PC terminal by RS485, the transmission recorder data;
(2) open into the unit and insert peripheral motor signal dry contact and other control signal dry contacts, on the unit module layout, adopted external input signal and output to do the photoelectricity isolation simultaneously, have perfect electric and safe isolation.By after opening unit module CPU and handling, the switching value status data is uploaded to fieldbus (CAN bus);
(3) leave the relay of finishing on the modular unit by the transmitting order to lower levels that receives on the CAN bus unit and export, realize the restart function of far-end low voltage motor;
(4) power subsystem input alternating current-direct current 80V--265V, output can be for the working power of other each cell operation;
(5) the host CPU control unit is finished bus data and is received, uses functions such as processing, function realization, logout, communication; The host CPU control unit is the core of whole device, based on the AT91RM9200 processor, external high capacity FLASH, SDRAM memory, network chip, real-time timepiece chip, high-speed CAN bus control chip, and move into high performance embedded OS linux, possess powerful data-handling capacity and application program management ability, have 485 ports of standard simultaneously, adopt Modbus RTU communications protocol, communication between support equipment realizes Long-distance Control;
The host CPU control unit receives voltage, electric current, the pass amount of the opening data on the CAN bus, and analyzing and processing in addition.When rolling electricity or low voltage condition occurring, the host CPU control unit receives voltage, the current data of bringing the analog quantity unit in real time, and itself and low voltage set value are compared, and determines whether it satisfies power down to determine whether restart function is implemented; When satisfying the power down parameter, determine to participate in the tabulation of restarting motor by the pass amount of opening data, and (restart immediately with the different patterns of restarting, time-delay is restarted in batches, time-delay is restarted by platform, time-delay intelligence is restarted) send a command to the CAN bus, receive order and action by leaving the unit, thereby finish this process of restarting, the SD that details that while host CPU control unit also will be restarted at every turn and switching value displacement information deposit on the host CPU control unit stores on the card, is sent to the backstage service terminal by specific communication protocol and makes things convenient for technical staff's query analysis;
(6) display unit provides man-machine interface, display unit and host CPU control unit still carry out communication by the CAN bus according to certain agreement, show measurement data and switching value state in real time, can set by the selection of button simultaneously and restart protection and operational factor, and amended parameter returned to the host CPU control unit by the CAN bus, realize the online modification parameter;
Advantage and the effect implemented after this technology are: independently modularized design, and more reliable and stable, also be easy to the maintenance of equipment; Restart function can realize that the centralized of low-tension motor restart, and has the restart function immediately of anti-" rolling "; Can restart the flexible setup parameter of order by what the user provided, kinds of protect function, function are thrown and are moved back conveniently; Become in the middle of directly measurement bus current, voltage reduce more and send link, can detect the rolling electricity that minimum reaches 20mS, real-time is higher; Have the operation note function, can review apparatus operating; Have distant control function, can realize network or host CPU control unit master serial ports realization distant place control; The continuous oneself of hardware and software detects, to obtain maximum reliability; In the processing of application program, adopt the processing structure of multithreading to make it have the on-line maintenance function, can the online modification of carrying out working procedure, can the online modification of carrying out project data; By to the reading of analog quantity unit recorder data, can provide electric current, change in voltage curve in the fault generating process, better the process of isolated-phase buses rolling electricity; Display unit adopts independently single-chip microcomputer, according to certain agreement and host CPU communication and do not take the resource of host CPU substantially, has button and LCD, for this device provides perfect human interface function; Power supply adopts Switching Power Supply, is applicable to the power of alterating and direct current input of wide region, and cost is low.This device has reliability height, real-time is good, applied widely, Operation and Maintenance is flexible characteristics.
Description of drawings
Fig. 1 is a low voltage motor restarting device general structure schematic diagram;
Wherein, 1-power subsystem, 2-host CPU control unit, 3-display unit, 4-open into unit, 5-and leave unit, 6-analog quantity unit, 7-PC terminal
Embodiment
Below in conjunction with accompanying drawing the present invention is further described:
See accompanying drawing 1, the connection of low voltage motor restarting device be adopt power subsystem (1) with host CPU control unit (2), display unit (3), open into unit (4), leave unit (5), analog quantity unit (6) directly are connected.Host CPU control unit (2), display unit (3), open into unit (4), leave unit (5), analog quantity unit (6) communicate according to certain agreement by the CAN bus.
See accompanying drawing 1, in 380V (690V) and following low-pressure system, motor circuit for continuous operation, when of short duration dead electricity appears in system,, need under the occasion that motor can reset automatically when power up for recovering technological process as early as possible, three-phase voltage and electric current insert analog quantity unit (6), be converted to the voltage signal in the AD sample range, the data after treated device is handled, active upload is to the CAN bus; Motor operating state and each configuration throwing are moved back the access of dry contact signal and are opened into unit (4), the data after treated device is handled, and active upload is to the CAN bus; Host CPU control unit (2) receives analog quantity unit (6) and opens data into unit (4) from the CAN bus, judge, when being provided with thresholding less than low-voltage, the voltage data of bringing when the analog quantity unit (6) that host CPU control unit (2) receives starts restart function, restart mode by the default pattern setting of restarting, and, send out by host CPU control unit (2) again and leave action command to the CAN bus by opening the motor numbering of determining to restart into the data of unit (4).After leaving unit (5) to receive order, carry out the corresponding relays action.
Restart the result of generation, no matter be that success or failure all are recorded in the details of dependent event on the SD card of this unit by host CPU control unit (2), recorder data on the analog quantity unit (6) and real time data can communicate through Modbus rtu protocol and PC terminal (7) by the RS485 interface, go up in PC terminal (7) to show real time data, logout information, voltage current waveform, online modification device parameter, device information inquiry etc.; The display unit of low voltage motor restarting device (3) is through CAN bus and host CPU control unit (2) swap data, also can independent displaying real time data and some other device configuration information, and parameter that can be by the button modifier on the display unit and be handed down to the function that host CPU control unit (2) is finished online modification.
Claims (5)
1. low voltage motor restarting device, comprise host CPU control unit, power subsystem, analog quantity unit, open, leave the structure of unit and display unit into the unit, it is characterized in that: each unit adopts modularized design, independent detection and independent control mode; Power subsystem and host CPU control unit, analog quantity unit, open into the unit, leave unit and display unit and be connected and its working power is provided; Host CPU control unit, analog quantity unit, open the unit, leave between unit and the display unit by the CAN bus and realize transfer of data between each unit.
2. low voltage motor restarting device according to claim 1 is characterized in that: high-speed sampling is realized to the input analog signal in the analog quantity unit, can detect voltage or current fluctuation less than 20ms; This unit has the record wave energy simultaneously, and its unit module is connected with the PC terminal by RS485, the transmission recorder data.
3. low voltage motor restarting device according to claim 1 is characterized in that: host CPU control unit, analog quantity unit, open into the unit, leave the unit and display unit has all adopted high-performance CPU intelligent controller.
4. low voltage motor restarting device according to claim 1, it is characterized in that: the CPU of host CPU control unit is the high-performance embedded ARM9 processor of low-power consumption, this unit has the RS485 interface, is used to connect the terminal equipment of intelligent MCC or DCS in factory system and so on.
5. low voltage motor restarting device according to claim 1 is characterized in that: power subsystem has adopted the AC-DC switch power supply of wide region input, has redundancy feature between the power subsystem.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101576180A CN102237835A (en) | 2010-04-27 | 2010-04-27 | Low-voltage motor restarting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101576180A CN102237835A (en) | 2010-04-27 | 2010-04-27 | Low-voltage motor restarting device |
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| Publication Number | Publication Date |
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| CN102237835A true CN102237835A (en) | 2011-11-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010101576180A Pending CN102237835A (en) | 2010-04-27 | 2010-04-27 | Low-voltage motor restarting device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103138380A (en) * | 2011-11-24 | 2013-06-05 | 上海华建电力设备股份有限公司 | Multi-functional relay and control method thereof |
| CN103475277A (en) * | 2013-07-14 | 2013-12-25 | 湖南金塔机械制造有限公司 | Mining plate-scraper control system and control method thereof |
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| CN101309003A (en) * | 2008-06-27 | 2008-11-19 | 东南大学 | Synthetic apparatus of anti-flashover and protection for low-voltage three phase asynchronous motor |
| CN201226444Y (en) * | 2008-05-20 | 2009-04-22 | 北京思瑞科技有限公司 | Control device for protecting low-voltage motor |
| CN101593965A (en) * | 2008-05-26 | 2009-12-02 | 鞍钢集团矿业公司 | The intelligent low-pressure motor protecter of charged energy function of measuring |
| CN201360139Y (en) * | 2009-01-19 | 2009-12-09 | 上海华建电力设备股份有限公司 | Group-type microcomputer motor protective monitoring device |
| CN201408251Y (en) * | 2009-01-19 | 2010-02-17 | 上海华建电力设备股份有限公司 | Modularized microcomputer electromotor protective and monitoring device |
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2010
- 2010-04-27 CN CN2010101576180A patent/CN102237835A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201226444Y (en) * | 2008-05-20 | 2009-04-22 | 北京思瑞科技有限公司 | Control device for protecting low-voltage motor |
| CN101593965A (en) * | 2008-05-26 | 2009-12-02 | 鞍钢集团矿业公司 | The intelligent low-pressure motor protecter of charged energy function of measuring |
| CN101309003A (en) * | 2008-06-27 | 2008-11-19 | 东南大学 | Synthetic apparatus of anti-flashover and protection for low-voltage three phase asynchronous motor |
| CN201360139Y (en) * | 2009-01-19 | 2009-12-09 | 上海华建电力设备股份有限公司 | Group-type microcomputer motor protective monitoring device |
| CN201408251Y (en) * | 2009-01-19 | 2010-02-17 | 上海华建电力设备股份有限公司 | Modularized microcomputer electromotor protective and monitoring device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103138380A (en) * | 2011-11-24 | 2013-06-05 | 上海华建电力设备股份有限公司 | Multi-functional relay and control method thereof |
| CN103475277A (en) * | 2013-07-14 | 2013-12-25 | 湖南金塔机械制造有限公司 | Mining plate-scraper control system and control method thereof |
| CN103475277B (en) * | 2013-07-14 | 2016-05-25 | 湖南金塔机械制造有限公司 | A kind of mining scraper machine control system and control method thereof |
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Application publication date: 20111109 |