CN206517044U - A kind of threephase asynchronous protection device - Google Patents
A kind of threephase asynchronous protection device Download PDFInfo
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- CN206517044U CN206517044U CN201720231273.6U CN201720231273U CN206517044U CN 206517044 U CN206517044 U CN 206517044U CN 201720231273 U CN201720231273 U CN 201720231273U CN 206517044 U CN206517044 U CN 206517044U
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- protection device
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Abstract
The utility model discloses a kind of threephase asynchronous protection device, including processor and the signal acquisition module, key-press module, memory module, display module, communication module, control module, clock module, the negative phase-sequence inverse time-lag protection module that are connected with processor.The utility model has stable protective value, can automatic identification interference and exclusive PCR, plant failure position can be found exactly, and alarm, with profit processing, changed at random with the physical condition according to system operation or failure situation, make protection that there is adaptive ability, with less debugging maintenance workload, save substantial amounts of manpower and materials, economic benefits, can also be further by protection, the function Uniting such as control and monitoring, cooperation, realize whole power system monitoring, control, the comprehensive automation of protection, further realize System for Power System Computer control.
Description
Technical field
The utility model belongs to asynchronous motor field, more particularly to a kind of threephase asynchronous protection device.
Background technology
With China's power industry fast development, the use of motor has almost penetrated into all trades and professions, is industry, agricultural
The important guarantee being normally carried out with national defense construction and people's lives.Accordingly ensure that the normal operation of motor just seems very heavy
Will.Due to many factors such as power network, motor quality itself and working environments, motor occurs that over-pressed, under-voltage, electric current is uneven
The failures such as weighing apparatus, underload and excessively stream, and thus bring huge economic loss.Therefore, the exploitation of motor protecting device is with grinding
System is imperative.Majority motor protecting device is still in the single-chip microcomputer using 8/16 at present, because such single-chip microcomputer is most of
Lack the functional modules such as SPI interface, I2C buses and A/D conversion mouths.If further to improve the property of motor protecting device
Can, then need to be extended by adding corresponding chip.This virtually adds system manufacturing cost, and reduce system can
By property, while the volume of product will increase with the increase of chip.
Utility model content
The purpose of this utility model is to overcome the problem above that prior art is present, and there is provided a kind of threephase asynchronous
Protection device, forms effective protection to threephase asynchronous.
To realize above-mentioned technical purpose and the technique effect, the utility model is achieved through the following technical solutions：
A kind of threephase asynchronous protection device, including processor and be connected with processor signal acquisition module,
Key-press module, memory module, display module, communication module, control module；
Signal connection and processing that the processor is used to set up between each module；
The signal acquisition module is used to be acquired the voltage signal and current signal of motor；
The key-press module includes parameter setting key and reset key, for setting operational factor and reset, and forms parameter
Signal and reset signal are sent to processor；
The memory module includes program storage, static memory and read-only storage, and program storage is used to deposit
Program, static memory is used to store the data that collection is calculated, and is read-only memory for the ginseng set to key-press module
Number is stored；
The display module is used to externally show the parameter that key-press module is set；
The communication module includes some physical interfaces, for being remotely controlled and remote measurement；
The control module includes the I/O controllers being connected with processor output end.
Further, the processor is also associated with clock module, and the clock module includes external crystal oscillator, adopted
Internal clocking mode is used, clock frequency is 12MHz.
Further, the processor uses 80C196MC single-chip microcomputers, including CPU, memory, interrupt control unit, I/O mouthful
With peripheral hardware in piece, peripheral hardware includes 1 A/D converter, 1 event handler array, two timers, 1 three-phase waveform in piece
Generator and 1 pwm unit.
Further, the signal acquisition module includes current transformer and transformer；
The secondary side of the current transformer is by resistance short circuit, from resistance two ends extraction voltage, single-chip microcomputer is sent into, to obtain
Obtain the collection signal of electric current；
The transformer is used to the next voltage signal of collection being transformed into single-chip microcomputer acceptable signal.
Further, in the key-press module parameter setting key turned over from above, under turn over, return and confirm that four keys are constituted, lead to
The penal menu operation can be carried out by crossing these buttons, realize parameter setting；The reset key be used for trouble shooting after reset or
Person uses when stopping in emergency.
Further, the memory module Program memory uses 32K EPROM27256 chips, the static storage
Device uses 32K RAM62256 chips, and the read-only storage uses the EEPROMX84041 chips of electrically erasable.
Further, the display module includes 4 LED digital display tubes.
Further, the communication module includes RS485 physical interfaces, it then follows the MODBUS communications protocol of international standard,
And adopt communication integration module RSM3485CHT.
Further, the processor is also associated with negative phase-sequence inverse time-lag protection module, for reset circuit in instant power-down
Reliable reset is carried out afterwards and ungrounded property unbalanced fault is handled, and the negative phase-sequence inverse time-lag protection module uses two sections
Formula specified time unbalanced fault protection is used as Electric Motor Open-phase Situation, stator winding or the asymmetric phase fault of lead-out wire, stator winding circle
Between short-circuit main protection, from the special chip MAX705 with hardware watchdog and reset function.
The beneficial effects of the utility model are：
The utility model has stable protective value, can automatic identification interference and exclusive PCR, can send out exactly
Existing plant failure position, and alarm, with profit processing, are changed at random with the physical condition according to system operation or failure situation,
Make protection that there is adaptive ability, with less debugging maintenance workload, save substantial amounts of manpower and materials, economic benefit can
See, can also further will function Uniting, the cooperation such as protection, control and monitoring, realize whole power system monitor,
Control, the comprehensive automation of protection, further realize System for Power System Computer control.
Brief description of the drawings
Accompanying drawing described herein is used for providing further understanding to of the present utility model, constitutes the part of the application,
Schematic description and description of the present utility model is used to explain the utility model, does not constitute to of the present utility model improper
Limit.In the accompanying drawings：
Fig. 1 is system module figure of the present utility model；
Fig. 2 is system construction drawing of the present utility model.
Embodiment
Below with reference to the accompanying drawings and in conjunction with the embodiments, the utility model is described in detail.
A kind of threephase asynchronous protection device as depicted in figs. 1 and 2, including processor and be connected with processor
Signal acquisition module, key-press module, memory module, display module, communication module, control module, when processor is also associated with
Clock module, clock module includes external crystal oscillator, and generally, system operating frequency is higher, to device performance, exploitation
The requirement of device is higher, therefore uses internal clocking mode, and clock frequency is 12MHz.
Processor is also associated with negative phase-sequence inverse time-lag protection module, and reliable reset is carried out after instant power-down for reset circuit
And ungrounded property unbalanced fault is handled, the negative phase-sequence inverse time-lag protection module is using two-part specified time negative phase-sequence electricity
Stream protection is used as Electric Motor Open-phase Situation, stator winding or the asymmetric phase fault of lead-out wire, the main protection of stator winding inter-turn short circuit：
First paragraph has high setting valve I21 (I section of current ration of negative-sequence current), short delay T21 (I sections of time definite values of negative-sequence current).The
Two sections have low definite value (II section of current ration of negative-sequence current), long delay T22 (n sections of time definite values of negative phase-sequence time)；Select simultaneously
Special chip MAX705, MAX705 with hardware watchdog and reset function are cheap micro- places of MAXIM companies production
Device monitoring chip is managed, it can provide four kinds of functions:When power-up, power down and when supply voltage declines, reseting pulse width
Representative value be 200ms；Independent monitoring tracking timer output, if monitoring tracking timer input is not touched in 1.6s
Hair, monitoring tracking timer output will be changed into low level；1.25V threshold detectors, for power failure alarm, low-voltage inspection
Survey or ++ beyond 5V；The effective manual reset input of low level.
Signal connection and processing that processor is used to set up between each module, processor use 80C196MC single-chip microcomputers,
Including peripheral hardware in CPU, memory, interrupt control unit, I/O mouthfuls and piece, peripheral hardware includes 1 A/D converter, at 1 event in piece
Manage device array, two timers, 1 three-phase waveform generator and 1 pwm unit.
Signal acquisition module is used to be acquired the voltage signal and current signal of motor, and signal acquisition module includes
Current transformer and transformer；The secondary side of current transformer is by resistance short circuit, from resistance two ends extraction voltage, sends into monolithic
Machine, to obtain the collection signal of electric current, so realized in the case where not influenceing major loop forceful electric power and light current it is complete every
From further improving the reliability of system；Transformer, which is used to that the voltage signal come will to be gathered, to be transformed into single-chip microcomputer and can connect
The signal received, then again these through the signal after voltage transformation and current transformation, by LPF, filters off High-frequency Interference
Signal, sends into A/D three passages, starts A/D conversions, transformation result is sent into single-chip microcomputer, so as to complete the collection of data.
Key-press module includes parameter setting key and reset key, for setting operational factor and reset, and forms parameter signal
Sent with reset signal to processor, in key-press module parameter setting key turned over from above, under turn over, return and confirm that four keys are constituted,
Can carry out the penal menu operation by these buttons, realize parameter setting, reset that reset key is used for after trouble shooting or
Used when stopping in emergency；In order to which safety action is accurate, a bistable circuits are constituted with two NAND gates, when button closure or
Although contact point produces shake during disconnection, it will not change in the state of bistable circuit output, so as to eliminate shake.
Memory module includes program storage, static memory and read-only storage, and program storage is used to deposit program,
Static memory is used to store the data that collection is calculated, and is read-only memory for carrying out the parameter that key-press module is set
Storage, memory module Program memory uses 32K EPROM27256 chips, and static memory uses 32K RAM62256
Chip, read-only storage uses the EEPROMX84041 chips of electrically erasable.
Display module to the parameter that key-press module is set for externally being shown, it is aobvious that display module includes 4 LED numbers
Show pipe.
Communication module includes some physical interfaces, and for being remotely controlled and remote measurement, communication module connects including RS485 physics
Mouthful, it then follows the MODBUS communications protocol of international standard, and adopt communication integration module RSM3485CHT, the inside modules integrated power supply
Isolation, electrical isolation, RS-485 transceivers and bus protection device, with good interference free performance.
Control module includes the I/O controllers being connected with processor output end.
The ARM single-chip microcomputers that this protection device is used make it in instruction system as a result of 32 new ARM core processors
Considerably beyond 8/16 traditional single-chip microcomputer in terms of system, bus structures, debugging technique, power consumption and cost performance, while ARM
Single-chip microcomputer is integrated with substantial amounts of interior peripheral hardware in chip internal, greatly improves its function and reliability, and perfect motor is protected
Shield device be the various operation information data in motor operation course are acquired, computing, analysis, monitoring, alarm, control
Comprehensive device, device is by fault alarm, protecting and threading off and realized using the setting of action delay time timely standard
True protection, it is ensured that the safety of production；It can be communicated by data message, realize the details of motor running situation upper
Monitored in real time on the machine of position, and management information is provided through computer data processing, before equipment is there may be significant trouble, more
Limit alarm can remind administrative staff to be handled in time, it is to avoid unnecessary shutdown and normal production is impacted, it is maximum
Ensure to limit the validity of equipment operation and control, when motor running parameter reaches preset early warning value, protection device
Early warning is only carried out, dropout is not triggered；But when more limit value reaches preset drop-away value, protection device enters dropout Time delay,
If equipment recovers normal operation in preset dropout delay time, cancel threading off performing；And if it exceeds the delay time limit, then protect
Protection unit sends trip signal, and driving executive component action, deenergization stops motor running, in control device of electric motor reality
While existing items defencive function, various protection informations are also generated and through delivering to computer management system in communication interface by device
System.
The utility model has stable protective value, can automatic identification interference and exclusive PCR, can send out exactly
Existing plant failure position, and alarm, with profit processing, are changed at random with the physical condition according to system operation or failure situation,
Make protection that there is adaptive ability, with less debugging maintenance workload, save substantial amounts of manpower and materials, economic benefit can
See, can also further will function Uniting, the cooperation such as protection, control and monitoring, realize whole power system monitor,
Control, the comprehensive automation of protection, further realize System for Power System Computer control.
General principle of the present utility model, principal character and advantage of the present utility model has been shown and described above.One's own profession
The technical staff of industry is it should be appreciated that the utility model is not restricted to the described embodiments, described in above-described embodiment and specification
Simply illustrate principle of the present utility model, on the premise of the utility model spirit and scope are not departed from, the utility model is also
Various changes and modifications are had, these changes and improvements are both fallen within the range of claimed the utility model.
Claims (9)
1. a kind of threephase asynchronous protection device, it is characterised in that：The signal being connected including processor and with processor
Acquisition module, key-press module, memory module, display module, communication module, control module；
Signal connection and processing that the processor is used to set up between each module；
The signal acquisition module is used to be acquired the voltage signal and current signal of motor；
The key-press module includes parameter setting key and reset key, for setting operational factor and reset, and forms parameter signal
Sent with reset signal to processor；
The memory module includes program storage, static memory and read-only storage, and program storage is used to deposit program,
Static memory is used to store the data that collection is calculated, and is read-only memory for carrying out the parameter that key-press module is set
Storage；
The display module is used to externally show the parameter that key-press module is set；
The communication module includes some physical interfaces, for being remotely controlled and remote measurement；
The control module includes the I/O controllers being connected with processor output end.
2. a kind of threephase asynchronous protection device according to claim 1, it is characterised in that：The processor also connects
Clock module is connected to, the clock module includes external crystal oscillator, and using internal clocking mode, clock frequency is 12MHz.
3. a kind of threephase asynchronous protection device according to claim 1, it is characterised in that：The processor is used
Peripheral hardware includes 1 A/D turns in peripheral hardware in 80C196MC single-chip microcomputers, including CPU, memory, interrupt control unit, I/O mouthfuls and piece, piece
Parallel operation, 1 event handler array, two timers, 1 three-phase waveform generator and 1 pwm unit.
4. a kind of threephase asynchronous protection device according to claim 1, it is characterised in that：The signal acquisition mould
Block includes current transformer and transformer；
The secondary side of the current transformer is by resistance short circuit, from resistance two ends extraction voltage, single-chip microcomputer is sent into, to obtain electricity
The collection signal of stream；
The transformer is used to the next voltage signal of collection being transformed into single-chip microcomputer acceptable signal.
5. a kind of threephase asynchronous protection device according to claim 1, it is characterised in that：In the key-press module
Parameter setting key turns over from above, under turn over, return and confirm that four keys are constituted, can carry out the penal menu operation by these buttons,
Realize parameter setting；Reset or used when stopping in emergency that the reset key is used for after trouble shooting.
6. a kind of threephase asynchronous protection device according to claim 1, it is characterised in that：In the memory module
Program storage uses 32K EPROM27256 chips, and the static memory uses 32K RAM62256 chips, described
Read the EEPROMX84041 chips that memory uses electrically erasable.
7. a kind of threephase asynchronous protection device according to claim 1, it is characterised in that：The display module bag
Include 4 LED digital display tubes.
8. a kind of threephase asynchronous protection device according to claim 1, it is characterised in that：The communication module bag
Include RS485 physical interfaces, it then follows the MODBUS communications protocol of international standard, and adopt communication integration module RSM3485CHT.
9. a kind of threephase asynchronous protection device according to claim 1, it is characterised in that：The processor also connects
Negative phase-sequence inverse time-lag protection module is connected to, reliable reset is carried out and not right to ungrounded property after instant power-down for reset circuit
Failure is claimed to be handled, the negative phase-sequence inverse time-lag protection module is disconnected as motor using two-part specified time unbalanced fault protection
Phase, stator winding or the asymmetric phase fault of lead-out wire, the main protection of stator winding inter-turn short circuit, from band hardware watchdog and
The special chip MAX705 of reset function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720231273.6U CN206517044U (en) | 2017-03-10 | 2017-03-10 | A kind of threephase asynchronous protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720231273.6U CN206517044U (en) | 2017-03-10 | 2017-03-10 | A kind of threephase asynchronous protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206517044U true CN206517044U (en) | 2017-09-22 |
Family
ID=59870290
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720231273.6U Expired - Fee Related CN206517044U (en) | 2017-03-10 | 2017-03-10 | A kind of threephase asynchronous protection device |
Country Status (1)
| Country | Link |
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| CN (1) | CN206517044U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110880740A (en) * | 2020-01-14 | 2020-03-13 | 浙江中科正方电子技术有限公司 | Intelligent low-voltage power distribution system control device and control system thereof |
-
2017
- 2017-03-10 CN CN201720231273.6U patent/CN206517044U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110880740A (en) * | 2020-01-14 | 2020-03-13 | 浙江中科正方电子技术有限公司 | Intelligent low-voltage power distribution system control device and control system thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170922 Termination date: 20180310 |