CN103633625A - Motor monitoring protection device - Google Patents
Motor monitoring protection device Download PDFInfo
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- CN103633625A CN103633625A CN201210310029.0A CN201210310029A CN103633625A CN 103633625 A CN103633625 A CN 103633625A CN 201210310029 A CN201210310029 A CN 201210310029A CN 103633625 A CN103633625 A CN 103633625A
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Abstract
The invention discloses a motor monitoring protection device. The motor monitoring protection device is characterized in that: a data acquisition module transfers collected information of a three-phase power supply and a thermosensitive element to a protection control module, and compares the data with data preset in a storage module, if the data exceed standards, the protection control module drives a disconnecting relay to perform protection. Through adopting the above structure, the motor monitoring protection device can perform all-round monitoring on the state of a motor in working, perform intelligent protection on the motor according to set requirements. Thus, the motor monitoring protection device of the invention is advantageous in high measuring precision, strong anti-jamming capability and stability of a system, wide protection range, flexible networking modes and supporting of remote-end control. With the motor monitoring protection device adopted, various kinds of starting modes of the motor can be realized, and configurations can be selected by a user, and therefore, the motor monitoring protection device is further advantageous in flexibility and convenience.
Description
Technical field
The present invention relates to three phase electric machine field, particularly a kind of motor monitoring protective device.
Background technology
Three phase electric machine refers to the threephase stator winding when motor, respectively differ 120 degree electrical degrees, pass into after three-phase alternating current, to produce a rotating magnetic field, cutting rotor winding produces induced current, the rotor conductor of current-carrying will produce electromagnetic force under the effect of stator rotating magnetic field, thereby on machine shaft, form electromagnetic torque, drive motor rotation.Three phase electric machine is widely used the every field in production and life at present.
For the three phase electric machine in work, go back at present the special equipment of neither one it is carried out to omnibearing detection, monitoring and protection.Three phase electric machine running environment is complicated, and the various faults such as phase shortage happen occasionally, thereby cause burn-down of electric motor.Cause heavy economic losses.
A kind of motor monitoring protective device is provided, and it is the problem that prior art need to solve with protection that the motor status in work is carried out to omnibearing monitoring.
Summary of the invention
Technical problem to be solved by this invention is, a kind of motor monitoring protective device is provided, and to reach, the motor in work carried out to monitoring and protection in all directions.
For solving the problems of the technologies described above; technical scheme of the present invention is; a kind of motor monitoring protective device; it is characterized in that: described monitoring and protecting device is that data acquisition module passes to protection control module by the information of the three phase mains collecting and temperature-sensitive element; and the data that arrange in advance in these data and memory module are contrasted; if superscalar data, protection control module driving isolation relay is protected, thereby the three phase mains of motor and temperature are carried out to monitoring in all directions.
Described data acquisition module is connected to host computer by communication module, sets up monitor network and realizes far-end control.
Described data acquisition module is connected to and shows and operational module, and handled easily personnel set every data in advance.
Described demonstration and the display module in operational module and operational module are relatively independent structure, by serial ports independently, be connected to data acquisition module respectively, thereby can be equipped with display module and operational module according to client's demand, a nearly step reduces the price of product, improves the market competitiveness.
Described data acquisition module is connected to instrument transformer three-phase voltage and electric current is monitored.
Described disconnecting relay comprises protection relay in motor start circuit and the alarm relay in warning circuit.
Described data acquisition module completes real-time parameter collection the calculating of motor operation, and real-time storage is in memory module.
Described demonstration and operational module are that relevant parameter is set in keyboard operation, and the circulation of real time data and protection type shows.
Described communication module mainly provides communication interface to support native system and host computer to realize data communication, thereby realize control centre, a plurality of motor status in scene is carried out to implementing monitoring.
The model of described data acquisition module master chip is ADE7878; The model of protection control module master chip is STM32F103.
Described communication module is supported RS-232, RS-485, tri-kinds of communications protocol of CANBUS.
A motor monitoring protective device, owing to adopting above-mentioned design and system configuration, this protective device has the following advantages: 1, can carry out to the motor status in work conduct monitoring at all levels and need to carry out intelligent protection to motor according to setting.2, certainty of measurement is high, and system rejection to disturbance ability and stability are strong, and protected species is complete; 3, networking mode is flexible, supports far-end to control; 4, can realize the various start modes of motor, by user's option and installment, flexible.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation;
Fig. 1 is the structured flowchart of a kind of motor monitoring protective device of the present invention;
In Fig. 1,1, instrument transformer; 2, data acquisition module; 3, protection control module; 4, communication module; 5, disconnecting relay; 6, temperature-sensitive element; 7, memory module; 8, host computer; 9, demonstration and operational module.
Embodiment
As shown in Figure 1; the present invention is that data acquisition module 2 passes to protection control module 3 by the information of the three phase mains collecting and temperature-sensitive element 6; and the data that arrange in advance in these data and memory module 7 are contrasted; if superscalar data; protection control module 3 driving isolation relays 5 are protected, thereby the three phase mains of motor and temperature are carried out to monitoring in all directions.
The present invention reduces external voltage and electric current in proportion by instrument transformer 1, then inputs data acquisition module 2.Data acquisition module 2 gathers and calculates according to setting cycle, and result of calculation is input to memory module 7.And show the demonstration that circulates after result of calculation being taken out from memory module 7 with operational module 9.Protect 3 pairs of result of calculations of control module and impose a condition and judge, thereby determine whether to occur protection action.Show with operational module 9 and support setting, the information inquiry of all parameters, and be saved in memory module 7.
Wherein the acp chip model of data acquisition module 2 is ADE7878.Be to be the high accuracy electric energy computation chip that design of heterogeneous (three Xian tetra-Xian Y types) configuration, in the dynamic range of 1000:1, can reach 0.1% precision, industry is initiated.The acp chip model of protection control module 3 is STM32F103VET6 (take ARM Cortex-M3 as kernel).There is high-performance, the feature of end power consumption.Communication module is supported RS-232, RS-485, CAN multiple kinds and 4 road analog signal output interfaces.Between protection control module and relay, be respectively equipped with the stability that light-coupled isolation chip is guaranteed system.
Show the acquisition and display of supporting following data with operational module 9: three-phase voltage, current effective value; Three-phase fundamental active power, First Harmonic Reactive Power, total (first-harmonic+harmonic wave) active power, total reactive power and apparent power; Ac frequency; Zero-sequence current effective value; The electric weight that this motor operation consumes; Support the circulation of following parameter to show: three-phase voltage, three-phase current, total active power, total reactive power, power factor, frequency, electrical consumption electric weight, protection type; Support locking to show: under malfunction, locking shows protection type, parking reason, parking correct time; Arrange and under state, show current set point and assignment procedure.
And support following setting parameter and operation: instrument transformer ratio, rated voltage, rated current, cross pressure ratio, under-voltage ratio, overcurrent ratio, undercurrent (underload) ratio, current imbalance rate, disconnected phase time, the machine mailing address, communication interface baud rate (RS-232 be to the maximum 19200bps, RS-485 are 12Mbps to the maximum, CAN is 1Mbps to the maximum), protect enable, communication enabled, removing relay protection.
Simultaneously the present invention supports following electric motor protecting pattern: overvoltage, under-voltage, overcurrent, undercurrent, current imbalance, disconnected phase, overload, motor temperature are too high.The protection type of supporting is that stand by lamp is lighted, warning information shows, relay protection cuts off motor power (protection control module judges whether to reach protective condition according to result of calculation).
The present invention has following characteristics:
(1) certainty of measurement is high: in the design of motor electric parameter sampling, native system has adopted special integrated chip ADE7878.ADE7878 ShiADI company is electric energy metrical and the special chip of special development, it is by 7 analog channels, the DSP (digital signal processor) of second order sigma-delta type ADC (analog to digital converter) and dedicated computing is integrated, execution cycle voltage, current effective value, always (first-harmonic and harmonic wave) is meritorious, always idle, apparent, first-harmonic is meritorious, accumulated value (the power of fundamental wave reactive power, electric energy), by built-in curing signal processing chain road, can complete the measurement of the whole electrical parameters of electrical network, the certainty of measurement grade of ADE7878 can reach the precision that is less than 0.1% in the dynamic range of 1000:1, it supports connection, the high-precision benchmark of Embedded and the neutral line current special ADC passage of the U.S. ANSI C12.10 standard three phase electric machines such as three-phase three-wire system, three-phase four-wire system.The waveform sampling data that all three-phases and neutral line current are provided, can be used for electric harmonic analysis.ADE7878 provides IIC, SPI (Serial Peripheral Interface (SPI)) and special-purpose HSDC (high speed data capture) serial line interface of flexible and selectable, user can select one of them to complete with peripheral MCU (micro-control unit) to carry out transfer of data, realizes several functions such as the collection of the programmed configurations of ADE7878, electric quantity data, calibrations.In brief, ADE7878 has guaranteed the requirement low-cost in metering system, system is succinct, certainty of measurement is high, reliability is high.Compare with existing analog acquisition circuit, the design have acquisition precision high (accuracy of data acquisition of three-phase voltage, electric current etc. is better than 0.2% grade), strong interference immunity, hardware realize simple, safeguard the plurality of advantages such as easy;
(2) stability of a system is strong: because industrial environment is harsher, therefore need electric machine controller to have stronger stability.Native system, from the realization of the system of choosing of chip, has all guaranteed the stable operation of system.This is exclusively used in the chip of Industry Control the STM32F103VET6 of the MCU employing ST Microelectronics of host machine part.A technical grade microprocessor of the MCU STM32F103RBT6 Ye Shi ST Microelectronics of display unit.Between each communication interface and MCU, all passed through special isolation, to protect the safety of minimum control system.Three-phase voltage, electric current and neutral line current are measured and are all adopted instrument transformer, have realized the isolation of forceful electric power signal and weak electric signal, have further strengthened the fail safe of whole system;
(3) networking mode is flexible; data transmission bauds is fast: native system design has adopted multiple communication module (can select to install): the DEVICENET agreement based on CAN and the MODBUS agreement based on RS-485, PROFIBUS agreement, PROFINET agreement are carried out multiple electric motors network configuration monitoring and protection, and the long-range output of 4-20mA analog quantity.DEVICENET agreement is a kind of low cost, stable communication protocol, MODBUS and PROFIBUS agreement are in the most widely used bussing technique standard of industry spot, PROFINET is the automation bus standard of a new generation of releasing of PROFIBUS international organization based on Industrial Ethernet technology, support the communication of TCP/IP standard, real-time communication and synchronous three kinds of communication modes of real-time communication, for automated communication field provides a complete Networking Solutions & provisioned, included such as real-time ethernet, motion control, distributed automatization, the much-talked-about topic of the current automatic field such as failure safe and network security, and, as the technology across supplier, can complete compatible Industrial Ethernet and existing fieldbus (PROFIBUS for example, MODBUS) technology, protection existing investment.Because the environmental interference degree of industry spot is not quite similar, native system adopts multiple communication baud rate (highest communication baud rate can reach 12Mbps), specifically can select to set and automatically preserve according to site environment;
(4) protected species is complete: native system has been considered the various abnormal conditions that can cause burn-down of electric motor, comprises overvoltage, under-voltage, overcurrent (short circuit and stall), undercurrent, overload, underload, disconnected phase, current imbalance, ground connection/electric leakage, underpower, overheated, external fault etc.And corresponding to the protection of various abnormal conditions, the parameters such as its setting range, operate time, manner of execution can be set voluntarily according to motor situation, effectively protect motor safety operation;
(5) control perfect in shape and function: Starting mode flexible and selectable, require to control internal relay, by relay, export the A.C. contactor of controlling motor circuit, realize the various Starting mode of motor.By adjusting of inside, realize the direct startup of motor, positive and negative startup, star triangle start, soft start.Guard time can independently be set, and in start-up time, has short circuit, phase shortage and ground protection, all the other guard shields, and after arriving start-up time, the protection of all settings drops into.Motor start-up, stop and reset has local operation (action button and HLMB button) and by communication network straighforward operation.After trip protection parking, there is faulty indication, as needs operate again, need first to reset.Reset operation can be undertaken by three kinds of modes: local operation, programmable device and remote signalling network.
By reference to the accompanying drawings the present invention is exemplarily described above; obviously specific implementation of the present invention is not subject to the restrictions described above; as long as the various improvement that adopted technical solution of the present invention to carry out, or directly apply to other occasion without improvement, all within protection scope of the present invention.
Claims (10)
1. a motor monitoring protective device; it is characterized in that: described monitoring and protecting device is that data acquisition module (2) passes to protection control module (3) by the information of the three phase mains collecting and temperature-sensitive element (6); and the data that arrange in advance in these data and memory module (7) are contrasted; if superscalar data, protection control module (3) driving isolation relay (5) is protected.
2. a kind of motor monitoring protective device according to claim 1, is characterized in that: described data acquisition module (2) is connected to host computer (8) by communication module (4), sets up monitor network and realizes far-end control.
3. a kind of motor monitoring protective device according to claim 1; it is characterized in that: described data acquisition module (2) is connected to and shows and operational module (9); show with operational module (9) in display module and operational module be relatively independent structure, by serial ports independently, be connected to data acquisition module (2) respectively.
4. a kind of motor monitoring protective device according to claim 1, is characterized in that: described data acquisition module (2) is connected to instrument transformer (1) three-phase voltage and electric current are monitored.
5. a kind of motor monitoring protective device according to claim 1, is characterized in that: described disconnecting relay (5) comprises protection relay in motor start circuit and the alarm relay in warning circuit.
6. according to a kind of motor monitoring protective device described in claim 1 or 2 or 3 or 4, it is characterized in that: described data acquisition module (2) completes real-time parameter collection the calculating of motor operation, and real-time storage is in memory module.
7. a kind of motor monitoring protective device according to claim 3, is characterized in that: described demonstration and operational module (9) are keyboard operation setting relevant parameter, and the circulation of real time data and protection type shows.
8. a kind of motor monitoring protective device according to claim 2, is characterized in that: described communication module (4) mainly provides communication interface to support native system and host computer to realize data communication.
9. according to a kind of motor monitoring protective device described in claim 1 or 2 or 3 or 4, it is characterized in that: the model of described data acquisition module (2) master chip is ADE7878; The model of protection control module (3) master chip is STM32F103.
10. according to a kind of motor monitoring protective device described in claim 2 or 8, it is characterized in that: described communication module (4) is supported RS-232, RS-485, tri-kinds of communications protocol of CANBUS.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210310029.0A CN103633625A (en) | 2012-08-28 | 2012-08-28 | Motor monitoring protection device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210310029.0A CN103633625A (en) | 2012-08-28 | 2012-08-28 | Motor monitoring protection device |
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| CN103633625A true CN103633625A (en) | 2014-03-12 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105094044A (en) * | 2015-09-15 | 2015-11-25 | 国网山东夏津县供电公司 | Intelligent detection control system for motors |
| CN105278360A (en) * | 2014-07-24 | 2016-01-27 | 赵武敏 | Cell control electromechanical device with machine vision |
| CN108757175A (en) * | 2018-08-01 | 2018-11-06 | 郑州森鹏电子技术有限公司 | A kind of CAN bus engine monitoring instrument and its control method |
| CN109004622A (en) * | 2018-10-18 | 2018-12-14 | 邓逍坷 | A kind of intelligent motor monitoring and protecting control device based on Industrial Ethernet |
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| US5436784A (en) * | 1993-08-11 | 1995-07-25 | Schweitzer Engineering Laboratories, Inc. | Motor protection relay using thermal models |
| CN2896634Y (en) * | 2006-01-24 | 2007-05-02 | 东北大学 | Intelligent motor protection instrument |
| CN201146372Y (en) * | 2007-12-26 | 2008-11-05 | 比亚迪股份有限公司 | Protection system for motor |
| CN101403391A (en) * | 2008-10-07 | 2009-04-08 | 同济大学 | Novel duplicate-power double-fan intelligent monitoring protection device |
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| CN201766346U (en) * | 2010-09-08 | 2011-03-16 | 宜昌清江电气有限公司 | Intelligent integrated protector for motor |
| CN203071560U (en) * | 2012-08-28 | 2013-07-17 | 芜湖中能电气科技有限公司 | Motor monitoring protection device |
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- 2012-08-28 CN CN201210310029.0A patent/CN103633625A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US5436784A (en) * | 1993-08-11 | 1995-07-25 | Schweitzer Engineering Laboratories, Inc. | Motor protection relay using thermal models |
| CN2896634Y (en) * | 2006-01-24 | 2007-05-02 | 东北大学 | Intelligent motor protection instrument |
| CN201146372Y (en) * | 2007-12-26 | 2008-11-05 | 比亚迪股份有限公司 | Protection system for motor |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105278360A (en) * | 2014-07-24 | 2016-01-27 | 赵武敏 | Cell control electromechanical device with machine vision |
| CN105094044A (en) * | 2015-09-15 | 2015-11-25 | 国网山东夏津县供电公司 | Intelligent detection control system for motors |
| CN108757175A (en) * | 2018-08-01 | 2018-11-06 | 郑州森鹏电子技术有限公司 | A kind of CAN bus engine monitoring instrument and its control method |
| CN108757175B (en) * | 2018-08-01 | 2023-07-04 | 郑州森鹏电子技术股份有限公司 | Control method of CAN bus engine monitor |
| CN109004622A (en) * | 2018-10-18 | 2018-12-14 | 邓逍坷 | A kind of intelligent motor monitoring and protecting control device based on Industrial Ethernet |
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Application publication date: 20140312 |