CN103872647A - Multiloop intelligent motor protector - Google Patents
Multiloop intelligent motor protector Download PDFInfo
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- CN103872647A CN103872647A CN201410064239.5A CN201410064239A CN103872647A CN 103872647 A CN103872647 A CN 103872647A CN 201410064239 A CN201410064239 A CN 201410064239A CN 103872647 A CN103872647 A CN 103872647A
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Abstract
The invention provides a multiloop intelligent motor protector, comprising one man-machine interaction unit and multiple independent motor protection units; the man-machine interaction unit and the independent motor protection units are all connected with an external monitoring system; the multiloop intelligent motor protector integrates measuring, protecting and controlling for the motor; the independent motor protection units can finish the measuring, protecting and controlling for one motor under the condition without connecting the man-machine interaction unit and a monitoring system. As multiple independent motor units share one man-machine interaction unit, so the whole multiloop intelligent motor protector is simpler, more material-saving, and easier to connect, and has the advantages of convenience in mounting and maintenance, easiness in parameter adjustment, reliability in system connection, low investment cost and the like.
Description
Technical field
The present invention relates to low-voltage three phase asynchronous electric motor protecting equipment technical field, relate in particular to a kind of multiloop intelligent protector for motor.
Background technology
Along with the development of distribution system, in order to guarantee the motor safety stable operation of low-voltage power supply and distribution system, prevention motor in use burns or causes serious accident, and the motor distribution loop of low-voltage distribution system all will be installed intelligent protector for motor.Present motor protecter, mainly using single-chip microcomputer as microcontroller, can be realized the intelligent comprehensive protection of motor.Electric current, the voltage signal data of motor protecter to front-end collection are calculated; according to the real time data calculating; the various faults phenomenons such as overcurrent, disconnected phase, stall, overload, electric leakage, overvoltage, under-voltage, degree of unbalance judges to processings, and to motor, implementation is protected and fault alarm.What have also has a remote communicating function, can be realized the motor of many networkings is realized to online integrated supervision and control by supervisory control system.
In traditional motor distribution loop, realize multiple motors are protected, a motor protecter is installed in each loop.Common motor protecter is generally adopted in two ways: a kind of is the mode that main body summation current transformer separates, main body is for measuring, show, operate, protect and controlling, be arranged on switch cabinet panel, current transformer, for switching current, is arranged on inside switch cabinet; Another kind is the mode of operation display, main body summation current transformer; operation display, for showing and operation, is arranged on switch cabinet panel, and main body is used for measurement, protection and controls; current transformer is for switching current, and main body summation current transformer is all arranged on inside switch cabinet.Electric motor loop is more, and motor protecter is just more, and installation wiring is just more complicated, and user's operation and maintenance is very inconvenient, and investment is larger.
Summary of the invention
The technical problem to be solved in the present invention is: in order to solve the motor protecter wiring complexity of in prior art, the more motor in loop being protected; equipment is various; user's operation and maintenance inconvenience; invest the problems such as larger, the invention provides a kind of multiloop intelligent protector for motor and solve the problems referred to above.
The technical solution adopted for the present invention to solve the technical problems is: a kind of multiloop intelligent protector for motor; comprise a personal-machine interactive unit and multiple free-standing electric motor protectings unit; described man-machine interaction unit is all connected with outer monitoring system with multiple free-standing electric motor protectings unit, and described man-machine interaction unit comprises
The first microcontroller, the measurement data, motor operating state and the fault alarm information that provide in order to receive described multiple free-standing electric motor protectings unit, and Protection parameters modification order and Electric Machine Control order are sent to free-standing electric motor protecting unit;
Display module, is connected with described the first microcontroller, in order to the measurement data interface, motor operating state interface, fault alarm information interface, Protection parameters modification interface and the Electric Machine Control interface that show that described the first microcontroller provides;
Key circuit, be connected with described the first microcontroller, switch in order to be implemented between measurement data interface, motor operating state interface, fault alarm information interface, Protection parameters modification interface and Electric Machine Control interface, and the order of input protection parameter modification and Electric Machine Control order;
The first communicating circuit, as the communication interface between described the first microcontroller and multiple free-standing electric motor protecting unit and outer monitoring system;
Described free-standing electric motor protecting unit comprises
Current transformer signal acquisition circuit, the current analog signal of collection motor, precision reaches 0.5 grade, and overload capacity reaches 10 times;
Voltage signal acquisition circuit, the voltage analog signal of collection motor;
Data operation process chip, received current analog signal and voltage analog signal, and carry out high-speed sampling and calculating, draw electric current, voltage, zero sequence and degree of unbalance data;
The second microprocessor, received current, voltage, zero sequence and degree of unbalance data, electric current, voltage, zero sequence and degree of unbalance data are carried out logic analysis and processing and contrasted and export internal control order with default Protection parameters, described internal control order generates in the time reaching default Protection parameters in electric current, voltage, zero sequence and degree of unbalance data, receives from the Protection parameters of described the first microcontroller or outer monitoring system and revises order and Electric Machine Control order;
Control relay circuit, obtains internal control order and controls to motor output, realizes the protection operation of motor,
Obtain from the Electric Machine Control order of described the first microcontroller or outer monitoring system and to motor output and control by described the second microcontroller, realize the startup of motor or close;
The second communicating circuit, as the communication interface between described the second microcontroller and the first microcontroller and outer monitoring system.
As preferably, described free-standing electric motor protecting unit also comprises switching value input circuit, and to described the second microcontroller output pulse or level signal, thereby described the second microcontroller opens or cuts out by control relay circuit control motor.
Concrete, described display module comprises LCDs, has the advantages such as large-screen backlight, high definition, wide visual angle.
Concrete, described man-machine interaction unit is installed on the cover of switch cubicle, and described multiple free-standing electric motor protecting cellular installations are in the inside of switch cubicle.
As preferably, described the first communicating circuit and the second communicating circuit are RS485 communicating circuit.
Further, described control relay circuit comprises for implementing electric motor starting normally opened relay and operating and cut out normally closed relay for the protection of implementing motor.
Concrete, described data operation process chip is electric energy chip 90E36, and in dynamic range 6000: 1, precision reaches 0.1 grade, and temperature is floated and also only had 6ppm/ ℃, the high-acruracy survey of Neng Dui tri-current signal He San road, road voltage signals.
The invention has the beneficial effects as follows; the measurement of this multiloop intelligent protector for motor current collection machine, protection and control are integrated; stand alone type electric motor protecting unit can be in the situation that not connecting man-machine interaction unit and supervisory control system; complete independently is measured, protects and control an electric motor loop; because sharing a personal-machine interactive unit in multiple free-standing electric motor protectings unit; make entirety more simply, more material saving, better connect, have that convenient for installation and maintenance, parameter regulates easily, system connects the advantages such as reliable, cost of investment is cheap.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is the frame diagram of the optimum embodiment of multiloop intelligent protector for motor of the present invention.
Embodiment
In conjunction with the accompanying drawings, the present invention is further detailed explanation.These accompanying drawings are the schematic diagram of simplification, and basic structure of the present invention is only described in a schematic way, and therefore it only shows the formation relevant with the present invention.
As shown in Figure 1, the invention provides a kind of multiloop intelligent protector for motor, comprise a personal-machine interactive unit and multiple free-standing electric motor protectings unit, man-machine interaction unit is all connected with outer monitoring system with multiple free-standing electric motor protectings unit, and man-machine interaction unit comprises display module, key circuit, the first microcontroller, the first communicating circuit;
The first microcontroller, the measurement data, motor operating state and the fault alarm information that provide in order to receive multiple free-standing electric motor protectings unit, and Protection parameters modification order and Electric Machine Control order are sent to free-standing electric motor protecting unit;
Display module, be connected with the first microcontroller, revise interface and Electric Machine Control interface in order to show measurement data interface, motor operating state interface, fault alarm information interface, Protection parameters that the first microcontroller provides, comprise LCDs, there is the advantages such as large-screen backlight, high definition, wide visual angle;
Key circuit, be connected with the first microcontroller, switch in order to be implemented between measurement data interface, motor operating state interface, fault alarm information interface, Protection parameters modification interface and Electric Machine Control interface, and the order of input protection parameter modification and Electric Machine Control order;
The first communicating circuit, as the communication interface between the first microcontroller and multiple free-standing electric motor protecting unit and outer monitoring system;
Stand alone type electric motor protecting unit comprises current transformer signal acquisition circuit, voltage signal acquisition circuit, data operation process chip, the second microcontroller, control relay circuit, the second communicating circuit, switching value input circuit;
Current transformer signal acquisition circuit, the current analog signal of collection motor, precision reaches 0.5 grade, and overload capacity reaches 10 times;
Voltage signal acquisition circuit, the voltage analog signal of collection motor;
Data operation process chip, is electric energy chip 90E36, and in dynamic range 6000: 1, precision reaches 0.1 grade, and temperature is floated and also only had 6ppm/ ℃, the high-acruracy survey of Neng Dui tri-current signal He San road, road voltage signals; Electric energy chip 90E36 received current analog signal and voltage analog signal, and carry out high-speed sampling and calculating, draw electric current, voltage, zero sequence and degree of unbalance data;
The second microprocessor, received current, voltage, zero sequence and degree of unbalance data, electric current, voltage, zero sequence and degree of unbalance data are carried out logic analysis and processing and contrasted and export internal control order with default Protection parameters, internal control order generates in the time reaching default Protection parameters in electric current, voltage, zero sequence and degree of unbalance data, receives from the Protection parameters of the first microcontroller or outer monitoring system and revises order and Electric Machine Control order;
Control relay circuit, obtains internal control order and controls to motor output, realizes the protection operation of motor,
Obtain from the Electric Machine Control order of the first microcontroller or outer monitoring system and to motor output and control by the second microcontroller, realize the startup of motor or close;
The second communicating circuit, as the communication interface between the second microcontroller and the first microcontroller and outer monitoring system, the first communicating circuit and the second communicating circuit are RS485 communicating circuit;
Switching value input circuit, to the second microcontroller output pulse or level signal, thereby the second microcontroller opens or cuts out by control relay circuit control motor;
Man-machine interaction unit is installed on the cover of switch cubicle, and multiple free-standing electric motor protecting cellular installations are in the inside of switch cubicle;
Control relay circuit also comprises for implementing electric motor starting normally opened relay and operating and cut out normally closed relay for the protection of implementing motor.
Take above-mentioned foundation desirable embodiment of the present invention as enlightenment, by above-mentioned description, relevant staff can, not departing from the scope of this invention technological thought, carry out various change and modification completely.The technical scope of this invention is not limited to the content on specification, must determine its technical scope according to claim scope.
Claims (7)
1. a multiloop intelligent protector for motor; it is characterized in that: comprise a personal-machine interactive unit and multiple free-standing electric motor protectings unit; described man-machine interaction unit is all connected with outer monitoring system with multiple free-standing electric motor protectings unit, and described man-machine interaction unit comprises
The first microcontroller, the measurement data, motor operating state and the fault alarm information that provide in order to receive described multiple free-standing electric motor protectings unit, and Protection parameters modification order and Electric Machine Control order are sent to free-standing electric motor protecting unit;
Display module, is connected with described the first microcontroller, in order to the measurement data interface, motor operating state interface, fault alarm information interface, Protection parameters modification interface and the Electric Machine Control interface that show that described the first microcontroller provides;
Key circuit, be connected with described the first microcontroller, switch in order to be implemented between measurement data interface, motor operating state interface, fault alarm information interface, Protection parameters modification interface and Electric Machine Control interface, and the order of input protection parameter modification and Electric Machine Control order;
The first communicating circuit, as the communication interface between described the first microcontroller and multiple free-standing electric motor protecting unit and outer monitoring system;
Described free-standing electric motor protecting unit comprises
Current transformer signal acquisition circuit, the current analog signal of collection motor;
Voltage signal acquisition circuit, the voltage analog signal of collection motor;
Data operation process chip, received current analog signal and voltage analog signal, and carry out high-speed sampling and calculating, draw electric current, voltage, zero sequence and degree of unbalance data;
The second microprocessor, received current, voltage, zero sequence and degree of unbalance data, electric current, voltage, zero sequence and degree of unbalance data are carried out logic analysis and processing and contrasted and export internal control order with default Protection parameters, described internal control order generates in the time reaching default Protection parameters in electric current, voltage, zero sequence and degree of unbalance data, receives from the Protection parameters of described the first microcontroller or outer monitoring system and revises order and Electric Machine Control order;
Control relay circuit, obtains internal control order and controls to motor output, realizes the protection operation of motor,
Obtain from the Electric Machine Control order of described the first microcontroller or outer monitoring system and to motor output and control by described the second microcontroller, realize the startup of motor or close;
The second communicating circuit, as the communication interface between described the second microcontroller and the first microcontroller and outer monitoring system.
2. multiloop intelligent protector for motor as claimed in claim 1; it is characterized in that: described free-standing electric motor protecting unit also comprises switching value input circuit; to described the second microcontroller output pulse or level signal, thereby described the second microcontroller opens or cuts out by control relay circuit control motor.
3. multiloop intelligent protector for motor as claimed in claim 1, is characterized in that: described display module comprises LCDs.
4. multiloop intelligent protector for motor as claimed in claim 1, is characterized in that: described man-machine interaction unit is installed on the cover of switch cubicle, and described multiple free-standing electric motor protecting cellular installations are in the inside of switch cubicle.
5. multiloop intelligent protector for motor as claimed in claim 1, is characterized in that: described the first communicating circuit and the second communicating circuit are RS485 communicating circuit.
6. multiloop intelligent protector for motor as claimed in claim 1, is characterized in that: described control relay circuit comprises for implementing electric motor starting normally opened relay and operating and cut out normally closed relay for the protection of implementing motor.
7. multiloop intelligent protector for motor as claimed in claim 1, is characterized in that: described data operation process chip is electric energy chip 90E36.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410064239.5A CN103872647A (en) | 2014-02-25 | 2014-02-25 | Multiloop intelligent motor protector |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410064239.5A CN103872647A (en) | 2014-02-25 | 2014-02-25 | Multiloop intelligent motor protector |
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| CN103872647A true CN103872647A (en) | 2014-06-18 |
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| CN201410064239.5A Pending CN103872647A (en) | 2014-02-25 | 2014-02-25 | Multiloop intelligent motor protector |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107658849A (en) * | 2017-07-18 | 2018-02-02 | 北京电联港电器设备有限责任公司 | Intelligent low-pressure comprehensive safety protection device |
| CN108882611A (en) * | 2018-07-27 | 2018-11-23 | 江苏银佳电气设备有限公司 | A kind of high-pressure immersed electromotor monitoring two-channel rotation is received at the counter |
| CN109787191A (en) * | 2019-02-28 | 2019-05-21 | 哈尔滨理工大学 | A kind of detection of asynchronous motor supplied with variable frequency and protection system and method |
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| CN201084006Y (en) * | 2007-09-04 | 2008-07-09 | 深圳市配天网络技术有限公司 | Network servo control device |
| 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 |
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2014
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Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS6489990A (en) * | 1987-09-29 | 1989-04-05 | Hitachi Ltd | Highly integrated control board |
| JPH0223038A (en) * | 1988-07-08 | 1990-01-25 | Mitsubishi Electric Corp | Parallel operation unit for generator |
| JPH05153723A (en) * | 1991-03-01 | 1993-06-18 | Siemens Ag | Controller for switchgear |
| JPH1189074A (en) * | 1997-09-10 | 1999-03-30 | Toshiba Corp | Load controller |
| JP2001042923A (en) * | 1999-08-03 | 2001-02-16 | Hitachi Ltd | Motor multirelay and plant monitor and control system |
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| 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 |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107658849A (en) * | 2017-07-18 | 2018-02-02 | 北京电联港电器设备有限责任公司 | Intelligent low-pressure comprehensive safety protection device |
| CN108882611A (en) * | 2018-07-27 | 2018-11-23 | 江苏银佳电气设备有限公司 | A kind of high-pressure immersed electromotor monitoring two-channel rotation is received at the counter |
| CN108882611B (en) * | 2018-07-27 | 2024-01-30 | 江苏银佳电气设备有限公司 | High-voltage submersible motor monitoring double-circuit switching cabinet |
| CN109787191A (en) * | 2019-02-28 | 2019-05-21 | 哈尔滨理工大学 | A kind of detection of asynchronous motor supplied with variable frequency and protection system and method |
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Application publication date: 20140618 |