CN201717615U - Motor protector - Google Patents
Motor protector Download PDFInfo
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- CN201717615U CN201717615U CN2010202599645U CN201020259964U CN201717615U CN 201717615 U CN201717615 U CN 201717615U CN 2010202599645 U CN2010202599645 U CN 2010202599645U CN 201020259964 U CN201020259964 U CN 201020259964U CN 201717615 U CN201717615 U CN 201717615U
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Abstract
The utility model relates to a motor protector, comprising a power plate, a control plate and a display plate, wherein the power plate and the control plate are inserted at an angle of 90 degree by three double-row pins. The power plate is provided with a power module, a binding post, a relay and a voltage transformer thereon. The control plate comprises a power supply unit, a sampling resistance, a filter circuit, an operational amplifier, an A/D converter, a DSP processor, an analog conversion output circuit and a 485 communication module. The sampling resistance and the filter circuit are used to convert current signals output by the voltage transformer and the signals, after the low-pass filter, enters the DSP processor through the operational amplifier and the A/D converter. The DSP processor processes and calculates the data. The analog conversion output circuit and the 485 communication module are connected with the DSP processor. The display plate comprises an eight digital tube, a plurality of buttons and a plurality of alarm indicating lamps, which are all welded on the display plate and connected with the control plate via 10-pin sockets.
Description
Technical field
The utility model relates to the emergency circuit protective device, relates in particular to a kind of motor protecter.
Background technology
Motor protector (motor protecter) is the important devices of generating, power supply, using electricity system, be inter-trade, have a large capacity and a wide range, the energy-conservation electronic product of Remarkable Energy Saving, almost be penetrated into all and use electrical domain; Be the important assurance of industry, agricultural and national defense construction and people's lives ordinary production and trouble free service, in national economy and energy-conservation cause, irreplaceable critical role and effect arranged." Energy Conservation Law of the People's Republic of China " regulation: " energy-conservation being meant strengthened with managing; take technical feasible, reasonable and environment and the social measure that can bear economically; loss and waste reducing from production of energy to each link of consumption, utilize the energy more effectively and reasonably "; " energy-conservation long-range strategy and policy of developing the economy ".Energy-conservation is system engineering.According to incompletely statistics, the 1KW-320KW low-tension motor quantity of whole nation operation is 6,000 ten thousand, accounts for more than 70% of electrical network power consumption, is the power-equipment that is most widely used in industrial or agricultural and the business system.Every year is burnt about 3,000,000 of motor quantity in the whole nation, and capacity is 1,000,000,000 kilowatts, and every year, only motor was several hundred million ten thousand degree with regard to power consumption in the process of burning, and price for repairing causes the stop work and production loss to reach several 10,000,000,000 yuan unexpectedly up to several about 10,000,000,000 yuan.Only above-mentioned expense not very, also can cause motor repair after power descend, power consumption is big, degradation directly influences enterprise's ordinary production.But illustrate by above-mentioned situation: the motor protector and the development trend whole nation thereof are annual because of about 1 hundreds of millions kilograms of maintenance motor electricity wasting magnet-wire, if produce 1 hundreds of millions kilograms of electromagnetic wires (per kilogram needs electricity consumption 33.4 degree) less annual just electrical energy saving 33.4 hundred million degree.
This product is based on the intelligent motor protection device of DSP technology; on the basis of the existing intelligent electric function that motor protector is realized in market, introduced embedded OS; make motor protecter upgrade to an embedded platform; the versatility of software is strengthened; autgmentability strengthens; increased the stability of product, fault-tolerance and upgradability, and lay the first stone for product further extended function from now on.Still do not have at home under the situation of using the embedded system motor protecter; this product takes the lead in using this system to make technical trial; improve the technical merit of product, begin to introduce in a large number under the present situation of embedded system, met the trend of product technology development at industrial control field.This project will drive application product research and development such as software, industrial electronics, digital technology and product, novel sensor research and development simultaneously.
Some producers developed the intelligent electric motor protector for the needs that adapt to motor protection both at home and abroad, but technical merit just differs.Small part adopts LCDs, less employing advanced person's high-speed dsp chip, and do not have product to adopt embedded OS.This project development product is specially as reservoir, ship lock, hydroelectric station, pumping plant and for the protection of the gate hoist of, drainage system in industrial circle electric motor protecting and the hydraulic engineering; has the high speed processing ability; high reliability; the middle-size and small-size motor protecting device that expanded compatibility is strong is realized protection when fault such as overheated, overload, short circuit, under-voltage, stall and imbalance can take place motor.Its major technique characteristics are: six charactron Pagination Display and data cut-off protection; Adopt the dsp chip of high speed high integration; Parallel high-precision high-speed AD conversion chip, sample simultaneously 3 road voltages and three road current values; The ModbusRTU interface of standard; Adopted embedded OS to improve the stable autgmentability and the compatibility of system.At present domesticly do not see that as yet the small-sized electric protector that has above technical characterstic is simultaneously arranged.Therefore the product development of this project successfully will become the leading product of domestic technique.
The utility model content
For addressing the above problem; the utility model provides a kind of employing DSP as processor; fast operation is powerful; adopt duplex high precision AD chip; can gather three-phase alternating voltage and three-phase current simultaneously, device has the motor protecter of defencive functions such as overload, stall, current imbalance, phase shortage, overvoltage, under-voltage, underload, overcurrent.
A kind of motor protecter of the present utility model; comprise power panel; control board and display panel; described power panel becomes an angle of 90 degrees to plug with control board by three double contact pins; power panel is provided with power module; the binding post of 19 external connections; relay and voltage transformer; power module provides DC power supply for the work of other module; relay is used for exporting control signal; voltage transformer is used for high-voltage signal is converted into a milliampere signal; described control board includes power supply unit; 6 road sampling resistors and filter circuit; operational amplifier; A/D converter; dsp processor; analog quantity conversion output circuit and 485 communication modules; described sampling resistor and filter circuit be used for changing voltage instrument transformer output current signal and carry out low-pass filtering after operational amplifier and A/D converter enter dsp processor; dsp processor is handled and is calculated data; analog quantity conversion output circuit is connected with dsp processor with 485 communication modules; described display panel comprises eight sections charactrons; a plurality of buttons and a plurality of alarm lamp, described eight sections charactrons; button all is welded on the display panel and by 10 pin insert rows with alarm lamp and is connected with described control board.
A kind of motor protecter of the present utility model, described power module be provided with one insert for described control board provides DC power supply 10 faller gills, analog and digital signal socket that 10 needle moulds fit digital signal socket and one 16 pin.
A kind of motor protecter of the present utility model, described power panel is provided with in the binding post of 19 external connections, and it is the 220V power supply that 3 binding posts are arranged, and all the other are holding wire.
A kind of motor protecter of the present utility model, described 19 external connection terminals become single arrangement.
The beneficial effect of the utility model motor protecter is: the utility model adopts DSP as processor; fast operation is powerful; adopt duplex high precision AD chip; can gather three-phase alternating voltage and three-phase current simultaneously, device has defencive functions such as overload, stall, current imbalance, phase shortage, overvoltage, under-voltage, underload, overcurrent.The user can on-the-spot be provided with: motor start-up time, rated current, overload operate time, overvoltage operating value, low-voltage value, locked rotor current multiple (with respect to rated current), earth leakage protective operating current value, three-phase current unbalance rate, underload operating value.
Like product on the contrast market, the motor protecter of the pure defencive function of location small size, the parameter of electric machine that this product is measured is more complete, comprises the analog measurement of three road voltages, three road electric currents.Only measure the measurement three-phase voltage that three-phase current has and the electric motor protective device of similar size and function has; or three-phase current adds a phase voltage; therefore the defencive function of device is subjected to certain limitation; and this product measurement parameter is more complete; the phase sequence and the power protection that comprehensive three-phase voltage under-voltage/over-voltage protection can be provided on the basis of existing basic defencive function and match by the user; therefore compare at similar small-sized motor protecter with market; this product makes the more approaching large-scale motor protecter of defencive function of this product accomplishing miniaturization and can be the user under the situation cheaply to provide more defencive function and selection.
Description of drawings
Fig. 1 is the system construction drawing of the utility model embodiment motor protecter;
Fig. 2 is the systems soft ware schematic flow sheet of the utility model embodiment motor protecter.
Embodiment
Below in conjunction with Figure of description the utility model motor protecter is described further.
Referring to Fig. 1 and Fig. 2; a kind of motor protecter of the present utility model; comprise power panel 1; control board 2 and display panel 3; power panel 1 becomes an angle of 90 degrees to plug with control board 2 by three double contact pins; power panel 1 is provided with power module 11; become the binding post 12 of 19 external connections of single arrangement; relay 13 and voltage transformer 14; power module 11 provides DC power supply for the work of other module; power module 11 is provided with one and inserts for control board 2 provides DC power supply 10 faller gills; one 10 needle mould fits the analog and digital signal socket of digital signal socket and one 16 pin; in the binding post of 19 external connections; it is the 220V power supply that 3 binding posts are arranged; all the other are holding wire; relay 13 is used for exporting control signal; voltage transformer 14 is used for high-voltage signal is converted into a milliampere signal; control board 2 comprises power supply unit 21; 6 road sampling resistors and filter circuit 25; operational amplifier 24; A/D converter 23; dsp processor 22; analog quantity conversion output circuit 26 and 485 communication modules 27; sampling resistor and filter circuit 25 be used for changing voltage instrument transformer 14 output current signal and carry out low-pass filtering after operational amplifier 24 and A/D converter 23 enter dsp processor 22; 22 pairs of data of dsp processor are handled and are calculated; analog quantity conversion output circuit 27 all is connected with dsp processor 22 with 485 communication modules 26; display panel 3 comprises eight sections charactrons; a plurality of buttons and a plurality of alarm lamp, eight sections charactrons; button all is welded on the display panel and by 10 pin insert rows with alarm lamp and is connected with control board 2.
Electric motor protecting is to detect three-phase voltage U A, UB, UC, making on the basis of three-phase current IA, IB, IC.
Referring to the system construction drawing among Fig. 1, the process of a kind of electric motor protecting implement body of the present utility model is as follows:
1, system powers on behind 220V alternating current input power module, and DSP is provided with parameters (subparameter before preserving automatically) and lights display screen each subsystem initialization;
2, motor power line voltage and current signal enters instrument transformer by binding post, the forceful electric power signal is converted into weak electric signal, this signal is a current signal, be converted into voltage signal by sampling resistor, after filter circuit filtering and operational amplifier amplification, be sent to A/D converter, DSP controls the real time data of high-precision modulus (A/D) converter sampling three-phase voltage, three-phase current, and DSP reads in the instantaneous value of six tunnel analog quantitys by parallel 16 bit data bus;
3, DSP handles and calculates data, obtains effective value, active power, reactive power and the power factor of three-phase voltage, three-phase current, obtains leakage current value by zero sequence current mutual inductor;
4, DSP judges by above numerical computations whether motor is in abnormal running status, be in which kind of abnormal condition, and data such as current voltage, current value or fault tape code are sent to display circuit by universal serial bus show, drive the two-way actuating of relay by DSP and report to the police as abnormality takes place;
5, instrument is used 485 buses by response mode or real-time mode and host computer is got in touch, and transmits information such as current electric current and voltage value or failure code, can accept to revise parameter from the commands for controlling of host computer.Instrument can be exported current any one road selectable voltage or current value by 4～20mA signal simultaneously.
In the utility model motor protecter, two-way relay output control signal is cut off the motor power loop during motor abnormality; DSP (TMS320LF2407) is as system processor, and it is the industry control processor of the band 16*16 hardware multiplier module of TI company exploitation; The high-speed parallel 16bitADC chip (ADS8364) of operational amplifier and TI is formed measuring circuit, detects the ac voltage signal after changing; 485 communication modules carry out the communication of instrument and host computer, adopt the ModbusRTU agreement; 4～20 milliamperes of change-over circuits are modulated into square-wave signal to the electric current and voltage value by DSP by PWM, are converted to by amplifier and are sent to U/I conversion chip (AD694) behind the voltage signal and convert the output of 4～20mA current signal to;
The following characteristics of the utility model electric motor protecting implement body:
1), six charactron page-turnable display voltage electric currents and various parameter, content is clear, and is easy to operate.
2), highly reliable modular power source, the input of 220V alternating current.
3), can show the three-phase voltage three-phase current, displaying contents is comprehensive.
4), the watchdog technique that adopts operating voltage to monitor and prevent to crash.
5), adopt high speed processor high-precision A device to guarantee the real-time and the reaction speed of sampling, adopt digital filtering technique and Error detection technology, to improve measurement accuracy and reliability.
6), can finish various data setting operations, operate visual and understandable by the button on the panel.
7), the passive contact output of big capacity, function is able to programme, control, warning function are powerful.
8), have a power-failure memory function, various initialize datas power up start again and need not to do any adjustment and can come into operation after shutdown.
9), embedded RS-485 communication interface, be convenient to the networking communication, realize remote monitoring.
10), have the leakage current input function, the more accurate response time of earth leakage protective is shorter.
The utility model based on the intelligent motor protection device (motor protecter) of DSP technology mainly with single-chip microcomputer as controller; can realize the intelligent comprehensive protection of motor; has remote communicating function; can realize on PC that the motor that reaches 256 All-China Federation of Taiwan Compatriots net is implemented in line generalization to be monitored and control; than analogue type motor protecter qualitative leap is being arranged aspect the sampling and the precision of adjusting; can carry out the software gamma correction to sampled signal; and can realize that real effective calculates; thereby greatly reduced the influence of measured signal wave distortion; really realized sampling with high precision; aspect adjusting, adopt numeral to set; set by the user is on-the-spot voluntarily by keyboard; there is not error, also can be overload protection many more inverse time lag curves of science are set.Because adopted single-chip microcomputer just to make the appearance at the comprehensive protection device of multiple function of same hardware condition next part and one become possibility; have multiple functions such as telecommunication, sound and light alarm, overload, stall, short circuit, electric leakage, undercurrent, fault memory; adopt AC Data, linear multi alignment technique, range automatic switchover technology, can keep very high sampling precision.Along with the development of microelectric technique, motor protector (motor protecter) is just towards intellectuality, synthesization, and high accuracy, highly reliable direction develops.
Above embodiment is described preferred implementation of the present utility model; be not that scope of the present utility model is limited; under the prerequisite that does not break away from the utility model design spirit; various distortion and improvement that the common engineers and technicians in this area make the technical solution of the utility model all should fall in the definite protection range of claims of the present utility model.
Claims (4)
1. motor protecter; comprise power panel; control board and display panel; it is characterized in that: described power panel becomes an angle of 90 degrees to plug with control board by three double contact pins; power panel is provided with power module; the binding post of 19 external connections; relay and voltage transformer; power module provides DC power supply for the work of other module; relay is used for exporting control signal; voltage transformer is used for high-voltage signal is converted into a milliampere signal; described control board includes power supply unit; 6 road sampling resistors and filter circuit; operational amplifier; A/D converter; dsp processor; analog quantity conversion output circuit and 485 communication modules; described sampling resistor and filter circuit be used for changing voltage instrument transformer output current signal and carry out low-pass filtering after operational amplifier and A/D converter enter dsp processor; dsp processor is handled and is calculated data; analog quantity conversion output circuit is connected with dsp processor with 485 communication modules; described display panel comprises eight sections charactrons; a plurality of buttons and a plurality of alarm lamp, described eight sections charactrons; button all is welded on the display panel and by 10 pin insert rows with alarm lamp and is connected with described control board.
2. motor protecter according to claim 1 is characterized in that: described power module be provided with one insert for described control board provides DC power supply 10 faller gills, analog and digital signal socket that 10 needle moulds fit digital signal socket and one 16 pin.
3. motor protecter according to claim 1 and 2 is characterized in that: described power panel is provided with in the binding post of 19 external connections, and it is the 220V power supply that 3 binding posts are arranged, and all the other are holding wire.
4. motor protecter according to claim 3 is characterized in that: described 19 external connection terminals become single arrangement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202599645U CN201717615U (en) | 2010-07-13 | 2010-07-13 | Motor protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202599645U CN201717615U (en) | 2010-07-13 | 2010-07-13 | Motor protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201717615U true CN201717615U (en) | 2011-01-19 |
Family
ID=43463621
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202599645U Expired - Fee Related CN201717615U (en) | 2010-07-13 | 2010-07-13 | Motor protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201717615U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104377654A (en) * | 2014-11-20 | 2015-02-25 | 安徽江河技术有限公司 | Motor running protecting method based on DSP embedded motor protector |
| CN112398383A (en) * | 2020-11-10 | 2021-02-23 | 上海翰萨智能科技有限公司 | Window pusher motor driving system and control method |
-
2010
- 2010-07-13 CN CN2010202599645U patent/CN201717615U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104377654A (en) * | 2014-11-20 | 2015-02-25 | 安徽江河技术有限公司 | Motor running protecting method based on DSP embedded motor protector |
| CN112398383A (en) * | 2020-11-10 | 2021-02-23 | 上海翰萨智能科技有限公司 | Window pusher motor driving system and control method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110119 Termination date: 20130713 |