CN201001091Y - Intelligent soft starting pressure, fluid level control device - Google Patents
Intelligent soft starting pressure, fluid level control device Download PDFInfo
- Publication number
- CN201001091Y CN201001091Y CNU2007200831956U CN200720083195U CN201001091Y CN 201001091 Y CN201001091 Y CN 201001091Y CN U2007200831956 U CNU2007200831956 U CN U2007200831956U CN 200720083195 U CN200720083195 U CN 200720083195U CN 201001091 Y CN201001091 Y CN 201001091Y
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- control device
- fluid level
- host microcomputer
- pressure
- microcomputer controller
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Abstract
The utility model relates to an intelligent soft-start pressure liquid level control device, which consists of a pressure transmitter (2), a liquid level transmitter (3), a host microcomputer main controller (4), and a motor driver (5). The output signals of the pressure transmitter and the liquid level transmitter are respectively connected with the input end of the host microcomputer controller (4), the output end of the host microcomputer controller (4) is connected with the trigger control end of the motor driver through a pulse transformer (15), the input end of the motor driver is connected with a three-phase power, and the output end thereof is connected with a three-phase induction motor. Compared with the traditional control device of a hydroelectric power station tradition, the control device resolves three key problems that firstly, the control device resolves the problem that an electric-contact pressure gauge and a float operate unreliably and an operating contact is difficult to regulate; secondly, the control device resolves the problem of the starting and the easy adhesion of an AC contactor; thirdly, the control device resolves the problem of the overcurrent of the motor starting, strengthening the protection for the motor, the pump and the controlled system. The utility model can be used for the pressure oil pump of a hydroelectric power station, an air compressor and the other industry pump control system and the civil life water supply system.
Description
Technical field
The utility model relates to the alternating current machine soft start-up control device, especially a kind of intelligent soft starter pressure, fluid level control device.
Background technology
The pressure oil pump of water generating factory configuration, air compressor, the top cover water pump, equipment such as deep well water pump and fire pump is driven by supporting separately alternating current motor respectively, when unit starts, its current of electric is up to 6-7 times of rated current, electrical network there is bigger impact, if multimachine starts simultaneously, impact then bigger, even influence the normal operation of other equipment in the electrical network, and motor and motor-operated plant equipment are also caused bigger impact, produce bigger oil hammer, pneumatic hammer, the water hammer value, influence its useful life, or make motor overheating burn winding, and then influence the normal power generation of water generating factory.
In traditional control device in hydroelectric station, employed electro connecting pressure gauge, float liquid level sensor functional reliability are relatively poor, and its action connection point is difficult to be adjusted; The adhesion of greatly, easily striking sparks of ac contactor contact noise, maintenance difficult.
Summary of the invention
The purpose of this utility model is to provide a kind of electric motor starting electric current that can significantly reduce in order to overcome above-mentioned the deficiencies in the prior art, eliminates Disturbance in Power Net, guarantees intelligent soft starter pressure, the fluid level control device of system safety operation.
Described intelligent soft starter pressure, fluid level control device are made of pressure transmitter 2, fluid level transmitter 3, host microcomputer master controller 4, motor driver 5; The output signal of pressure transmitter 2, fluid level transmitter 3 is connected with the input of host microcomputer controller 4 respectively after isolating amplification, A/D conversion, the output of host microcomputer controller 4 through photoelectricity isolate with the D/A conversion after be connected by the trigger control end of pulse transformer 15 with motor driver 5, the input of motor driver 5 is connected with three phase mains, and its output is connected with three-phase induction motor.Described motor driver 5 is composed in parallel with bypass A.C. contactor 7 by intelligent thyristor module 6.Described host microcomputer controller 4 is provided with and shows and guidance panel 8, demonstration and guidance panel 8 comprise that microprocessor 14, Chinese LCDs 11, parameter are provided with key 12, hand automatic switchover button 13, microprocessor 14 is connected with host microcomputer controller 4 FPDP by data-interface, the output of microprocessor 14 is connected with Chinese LCDs 11, and parameter setup key 12, hand automatic switchover button 13 are connected with the input of host microcomputer controller 4.Described host microcomputer controller 4 is provided with RS485 on-line communication interface 9, and RS485 on-line communication interface 9 can be connected with the communication interface of many intelligent soft starter pressure, fluid level control device.
The utility model is the contactless electric machine control device that designs for hydraulic power plant's pressure oil pump, air compressor, top cover water pump, deep well water pump and fire pump specially.This device transmitter accurate to detect, reliable operation is a measuring element; with the sixteen bit industrial computer is the control core; adopt the Electric Machine Control algorithm; have multiple Starting mode such as voltage ramp startup, current-limited startup, kick torque startup; and multiple halt mode such as free shutdown, soft stop, skidding, can adapt to the control of the various load motors of hydraulic power plant.Also can be used for other industrial pump control system and domestic life water system.
Compare with the control device that the hydroelectric station is traditional, the intelligent soft starter control device has solved three big key issues:
1, thoroughly solved the problem of the unreliable and difficult adjustment of action connection point of electro connecting pressure gauge and float work.Pressure, fluid level transmitter detect accurately, stable performance, its output signal are 4～20mA electric current, oil pump (water pump) electric motor starting, stop contact and pressure, liquid level too high, cross low output contact and all can be provided with by panel button, not only convenient and swift, and accurately and reliably.
2, thoroughly solved the problem of A.C. contactor " sparking " and easy adhesion.Thyristor module is a contactless controller spare, thereby can " not strike sparks ", can adhesion.Built-in bypass contactor is not all worked when starting and stopping, thereby can " not strike sparks " yet, can adhesion.
3, thoroughly solved the excessive problem of electric motor starting electric current, strengthened protection motor, pump and controlled system.
Description of drawings
Fig. 1 is the utility model structural representation,
Fig. 2 is the utility model theory diagram,
Fig. 3 is the utility model key wiring diagram,
Fig. 4 is many All-China Federation of Taiwan Compatriots of the utility model machine schematic diagram.
Embodiment
The current signal that pressure, fluid level transmitter are sent here (pressure transmitter 0-XMPa correspondence 4～20mA, fluid level transmitter 0～XM correspondence 4～20mA) is input host microcomputer controller after isolating amplification, A/D conversion, the host microcomputer controller is according to pressure, the level value of surveying and after comparing by the keyboard to set up value, and the analog signal of output after the D/A conversion controlled electric motor starting and stopped.Be to increase the reliability of equipment operation, specialized designs A.C. contactor bypass operation and A.C. contactor directly start the loop, even if control main board and thyristor all damage, the intelligent soft starter control device still can be kept operation.
The utility model has multiple startup, stops mode with field-programmable DSP core control system, can adapt to the motor of various load type, can control by a pump one, and arbitrary control device fault does not influence the operation of other control device; Can a master be equipped with more, can form main preparation systems by 8 All-China Federation of Taiwan Compatriots's machines at most; But A.C. contactor bypass operation, the A.C. contactor emergency start; Have the automatic repairing of pressure oil system, automatic gas compensation function; Many pump impellers change operation in the same system; Water pump is thrown lubricated profit, the automatic emptying of air compressor machine, blowdown automatically; Multi-machine shared transmitter in the same system, the transmitters sense treatment circuit is independent; Have the RS485 communication function, can with full factory supervisory control system interface, its transmitter and float contact (electro connecting pressure gauge) and remote control signal parallel running; Has too high, low excessively, superelevation, the output of ultralow alarm contact; Can normally start, the output of standby startup, run signal contact, and have alarm information record, can write down 16 nearest warning information at most.
Described device is set different startups and is stopped mode at different load type, comes starter motor with the starting current of minimum.Generally the starting current of motor is controlled in three times of rated current.And this device also has perfect defencive functions such as open phase protection, rotation-clogging protection, current imbalance protection, overvoltage protection, under-voltage protection, short-circuit protection.Not only protected motor effectively; prolonged the useful life of pump and motor; and can also eliminate electric motor starting the time to the interference of station service; the soft start of intelligent soft starter control device and soft hold function are in pressure oil system, pressure gas system and pressure water system in addition; oil hammer, pneumatic hammer, the water hammer value of system are reduced, to guarantee the safe operation of system.
In conjunction with the accompanying drawings the utility model is further specified again below: among Fig. 1,2,3, the output signal of pressure transmitter 2, fluid level transmitter 3 is amplified by isolating, be connected with the input of host microcomputer controller 4 respectively after the A/D conversion, the output of described host microcomputer controller 4 through photoelectricity isolate with the D/A conversion after be connected by the trigger control end of pulse transformer 15 with motor driver 5, the input of described motor driver 5 is connected with three phase mains, and its output is connected with three-phase induction motor.Described motor driver 5 is composed in parallel with bypass A.C. contactor 7 by intelligent thyristor module 6.Microprocessor 14 is connected with host microcomputer controller 4 data by data-interface, the output of microprocessor 14 is connected with Chinese LCDs 11, parameter setup key 12 is connected with the input of microprocessor 14, and hand automatic switchover button 13 is connected with the input of host microcomputer controller 4.Among Fig. 4, RS485 on-line communication interface 9 can be connected with many intelligent soft starter pressure, level gauge communication interface.
Be controlled to be example with start and stop control, crawl now, sketch a kind of course of work of the present utility model: start and stop control is meant with an enabling signal and comes starting drive output that this signal can be cancelled after the startup.Come arresting stop output with another stop signal when stopping.Crawl control is meant with a signal enabling device output, arresting stop output when this signal is cancelled.Under the start and stop control mode, input " startup of this machine ", " the normal startup ", " standby startup " arbitrary signal enabling output stop output when input " this machine stops ", " stopping automatically " signal." this machine stops " correspondence " startup of this machine ", " stopping automatically " correspondence " the normal startup " reaches " standby startup ": under the crawl control mode, the output of input " this machine crawl " signal enabling is cancelled " this machine crawl " signal and is stopped output.Input " the normal startup " or the output of " standby startup " signal enabling are cancelled " the normal startup " or " standby startup " signal and are stopped output.It is effective when remote signal operation has only device to be in automatic operation.(press " automatically " key on the lower panel, simultaneously automatic pilot lamp bright) according to the measured value AutoPlay function simultaneously effectively, the enabling signal of two kinds of control signals be or relation, stop stop signal corresponding to enabling signal.Be that arbitrary entry condition starts when satisfying, the stop condition corresponding with enabling signal stops when satisfying.Starting mode has: voltage ramp, current-limited startup, kick torque, directly start the soft start initial voltage by the setting of " starting resistor " parameter item, should be set to 30%～70%Ue.Soft start is finished constantly.Parameter item " start-up time " setting voltage rate of rise, device judges whether start-up course is finished automatically in the voltage ramp uphill process, finish start-up course and complete conducting thyristor when finishing immediately when detecting to start.Bypass contactor closing moment.After startup is finished, move about 1 second closed bypass contactor.Thyristor turn-offs constantly.Detect after the bypass contactor closure, move about 1 second cutoff thyristor.Arrive current limliting constantly.Parameter item " start-up time " is invalid when current-limited startup.Device judges whether to arrive cut-off current automatically with maximum voltage rate of rise output voltage in the voltage ramp uphill process, regulated output voltage behind the arrival cut-off current, and cut-off current is set by " cut-off current " parameter item, and soft start is finished constantly.After arriving cut-off current and regulated output voltage, device judges whether start-up course is finished automatically, finishes start-up course and complete conducting thyristor when finishing immediately when detecting to start.Bypass contactor closing moment, start finish after, move about 1 second closed bypass contactor.Thyristor turn-offs constantly.Detect after the bypass contactor closure, move about 1 second cutoff thyristor, kick finish time.Set by parameter item " kick time ".Device is at first exported corresponding step voltage in kick in the time.After the kick time finished, device was pressed the output of initial voltage slope again.Parameter item " start-up time " setting voltage rate of rise, device judges whether start-up course is finished automatically in the voltage ramp uphill process, finish start-up course and complete conducting thyristor when finishing immediately when detecting to start.Therefore it all is uncertain reaching.Bypass contactor closing moment.After startup is finished, move about 1 second closed bypass contactor.Thyristor turn-offs constantly.Detect after the bypass contactor closure, move about 1 second cutoff thyristor.Directly startup is meant without thyristor, starts by bypass contactor.Halt mode has: soft stop, freely shut down, skidding orderly closedown time elder generation conducting thyristor, disconnect bypass contactor again, shut down according to halt mode then, disconnect bypass contactor constantly.Device is at 0 conducting thyristor constantly fully, disconnects bypass contactor after moving about 1 second.Soft stop zero hour.Disconnect bypass contactor and move after about 1 second, output soft stop voltage also begins the soft stop process.Soft stop is finished constantly.Whether parameter item " dwell time " setting voltage descending slope, device detect soft stop automatically and finish.Open bypass contactor constantly.Device is at 0 conducting thyristor constantly fully, disconnects bypass contactor after moving about 1 second.Soft stop zero hour.Disconnect bypass contactor and move after about 1 second cutoff thyristor.
Claims (4)
1, a kind of intelligent soft starter pressure, fluid level control device is characterized in that: described device is made of pressure transmitter (2), fluid level transmitter (3), host microcomputer controller (4), motor driver (5); The output signal of pressure transmitter (2), fluid level transmitter (3) is connected with the input of host microcomputer controller (4) respectively after isolating amplification, A/D conversion, the output of host microcomputer controller (4) through photoelectricity isolate with the D/A conversion after be connected by the trigger control end of pulse transformer (15) with motor driver (5), the input of motor driver (5) is connected with three phase mains, and its output is connected with three-phase induction motor.
2, intelligent soft starter pressure according to claim 1, fluid level control device is characterized in that: described motor driver (5) is composed in parallel by intelligent thyristor module (6) and bypass A.C. contactor (7).
3, intelligent soft starter pressure according to claim 1, fluid level control device, it is characterized in that: described host microcomputer controller (4) is provided with and shows and guidance panel (8), demonstration and guidance panel (8) comprise microprocessor (14), Chinese LCDs (11), parameter is provided with key (12), hand automatic switchover button (13), microprocessor (14) is connected with host microcomputer controller (4) FPDP by data-interface, the output of microprocessor (14) is connected with Chinese LCDs (11), parameter setup key (12), hand automatic switchover button (13) is connected with the input of microprocessor (14).
4, intelligent soft starter pressure according to claim 1, fluid level control device, it is characterized in that: described host microcomputer controller (4) is provided with RS485 on-line communication interface (9), and RS485 on-line communication interface (9) is connected with the communication interface of many intelligent soft starter pressure, fluid level control device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200831956U CN201001091Y (en) | 2007-01-16 | 2007-01-16 | Intelligent soft starting pressure, fluid level control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200831956U CN201001091Y (en) | 2007-01-16 | 2007-01-16 | Intelligent soft starting pressure, fluid level control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201001091Y true CN201001091Y (en) | 2008-01-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200831956U Expired - Lifetime CN201001091Y (en) | 2007-01-16 | 2007-01-16 | Intelligent soft starting pressure, fluid level control device |
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| CN (1) | CN201001091Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109742980A (en) * | 2018-12-21 | 2019-05-10 | 巩俭 | The device and control method of threephase asynchronous start and stop, control and voltage-reducing and electricity-saving |
| CN110768588A (en) * | 2018-07-26 | 2020-02-07 | 比亚迪股份有限公司 | Control method and device for adjusting motor, storage medium and vehicle |
| CN111396300A (en) * | 2020-05-06 | 2020-07-10 | 浙江川肯电气有限公司 | Operating system of integrated intelligent soft start air compressor |
| CN112902023A (en) * | 2020-12-21 | 2021-06-04 | 重庆江增船舶重工有限公司 | Steam pipeline pressurization system and full-automatic control method thereof |
-
2007
- 2007-01-16 CN CNU2007200831956U patent/CN201001091Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110768588A (en) * | 2018-07-26 | 2020-02-07 | 比亚迪股份有限公司 | Control method and device for adjusting motor, storage medium and vehicle |
| CN109742980A (en) * | 2018-12-21 | 2019-05-10 | 巩俭 | The device and control method of threephase asynchronous start and stop, control and voltage-reducing and electricity-saving |
| CN111396300A (en) * | 2020-05-06 | 2020-07-10 | 浙江川肯电气有限公司 | Operating system of integrated intelligent soft start air compressor |
| CN112902023A (en) * | 2020-12-21 | 2021-06-04 | 重庆江增船舶重工有限公司 | Steam pipeline pressurization system and full-automatic control method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: WUHAN HAIJI ELECTRIC POWER TECHNOLOGY DEVELOPMENT Free format text: FORMER NAME: WUHAN HAIJI SCIENCE + TECHNOLOGY DEVELOPMENT CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 430010, room 6, building 248, 106 Whampoa Road, Jiang'an District, Hubei, Wuhan Patentee after: Wuhan science and Technology Development Co., Ltd. Hodge power Address before: 430010, room 6, building 248, 106 Whampoa Road, Jiang'an District, Hubei, Wuhan Patentee before: Wuhan Haiji Science & Technology Development Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20080102 |
|
| EXPY | Termination of patent right or utility model |