CN207377784U - A kind of electric-control system for being used to monitoring, being promoted submersible pump startability - Google Patents
A kind of electric-control system for being used to monitoring, being promoted submersible pump startability Download PDFInfo
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- CN207377784U CN207377784U CN201721091378.2U CN201721091378U CN207377784U CN 207377784 U CN207377784 U CN 207377784U CN 201721091378 U CN201721091378 U CN 201721091378U CN 207377784 U CN207377784 U CN 207377784U
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- submersible pump
- controller
- electric
- control system
- promoted
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- Control Of Non-Positive-Displacement Pumps (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
The utility model is related to a kind of for monitoring, being promoted the electric-control system of submersible pump startability, it is in submersible pump start-up course, when the detent torque of submersible pump is close to load resistance square, during the difficulty in starting of submersible pump, matched capacitance is put into along polarity in the loop, is allowed to form an approximate LC oscillation circuits with the submersible pump under starting state, improves the voltage of motor receiving end, to overcome load resistance square, the clean boot of motor is realized.The utility model patent is by the improvement to traditional Starting mode, and while promoting the detent torque of motor, effective guarantee supplies the operational safety of transformer.
Description
Technical field
The utility model is related to it is a kind of for submersible pump start control system, more particularly to one kind for monitor,
Promote the electric-control system of submersible pump startability.
Background technology
At present, the existing submersible pump Starting mode that is commonly used for is divided into two major classes in the market：One kind is to directly initiate.This
The capacity that the startup of kind of Starting mode generally requires transformer is more than 4 times of submersible pump rated capacity, otherwise when the electricity on circuit
When stream is more than the current limit that transformer allows, the tripping of transformer can be caused, it is impossible to smoothly start.In the operation of submersible pump
Occasion is generally all difficult to meet, and particularly it is more difficult to reach this requirement for powerful submersible pump.
Second class is reduced-voltage starting, and traditional reduced-voltage starting mode is divided into three kinds：The first is stator string resistance or reactance
Start；Second is auto-transformer reduced-voltage starting；The third is soft strater reduced-voltage starting.
Three of the above Starting mode has the characteristics of common, that is, reduces the voltage of submersible pump receiving end, therefore exists
Following deficiency：The landing of voltage in start-up course of submersible pump adapted motor can cause being greatly reduced for its detent torque,
From the characteristic of motor：The first power landing of voltage can cause the quadratic power of motor start-up torque to reduce.Submersible pump
Typical startability curve is shown in Fig. 1, wherein：Ist/IN-- rated voltage dive water power pump startup electric current multiple；Ist’/
Submersible pump starting current multiple after IN-- decompression；Tst/TN-- rated voltage dive water power pump startup torque multiple；
Submersible pump detent torque multiple after Tst '/TN-- decompression；Tp/TN-- load water pump moment of resistance multiple；S-- diving electricity
Pump the revolutional slip of adapted motor.
Known by Fig. 1：When the startability curve of submersible pump intersects at A points with load water pump damping moment curve, i.e.,
When the detent torque of motor is less than the moment of resistance of water pump, rotating speed can rest at this point, motor sends " drone motor at this time
Drone " sound, rotating speed no longer rises, it is impossible to up to rated speed.Motor start-up does not get up at this time, starts failure.
Utility model content
The purpose of this utility model be exactly in order to solve the deficiency in above-mentioned technology, and provide it is a kind of monitoring, promoted diving
The electric-control system 2 of electric pump startability, such electric-control system 2 make the startability of submersible pump 1 be greatly improved,
While not influencing 4 riding quality of power grid, the detent torque of submersible pump 1 is improved, ensures the smooth startup of submersible pump 1,
And after the completion of start-up course, rational switching capacitance 5 arrives the operational mode of submersible pump 1.Improve the operation of transformer 3
The startup reliability of security and submersible pump.
In order to achieve the above object, the technical solution adopted in the utility model is：A kind of monitoring promotes submersible pump startup
The electric-control system of performance：In 1 start-up course of submersible pump, by installing electricity on the rotor of 1 adapted motor of submersible pump
Machine speed device, is monitored the acceleration of its rotating speed, when detecting that this value is less than a certain fixed value, this means that latent
The detent torque of water power pump 1 is close to load resistance square, it is therefore foreseen that 1 difficulty in starting of submersible pump.When being started according to submersible pump 1
Characteristic, power factor≤0.2 can be approximately considered the motor of submersible pump adapted as perception, then throw in the loop at this time
Enter matched capacitance 6, form an approximation LC oscillation circuits, while capacitance 6 must be put under the conditions of along polarity phase, ensure capacitance
6 discharge conditions to improve the voltage of 1 receiving end of submersible pump, that is, improve the detent torque of the submersible pump 1, to overcome load
The water pump moment of resistance realizes the clean boot of submersible pump 1.After the completion of start-up course, timely and effective switch-capacitor 6 ensures electricity
4 operational safety of net.
Survey rotation speed change device in above-mentioned electric-control system, using in magnetoelectric transducer, tachometer generator, rotary encoder
It is any, on the rotor of adapted motor.
Matched capacitance 6 is the startability according to motor in above-mentioned electric-control system, calculates inductance, then reasonable computation
With matched capacitance, an approximation LC oscillation circuits are formed.
Refer to the state that capacitance 6 discharges in this approximation LC oscillation circuit along polarity phase in above-mentioned electric-control system.
Submersible pump receiving end refers to the cable outlet end of submersible pump in above-mentioned electric-control system, i.e. B points in Fig. 2.
Above-mentioned electric-control system is controlled by controller 10.
From the above technical scheme, it can be seen that the beneficial effects of the utility model：
Electric-control system improves the detent torque of submersible pump 1, more than its load resistance square, improves submersible pump startup
Reliability.Electric-control system utilizes LC oscillation circuit principles, cannot overcome the resistance of load water pump in 1 detent torque of submersible pump
During square, the voltage of submersible pump receiving end B points is promoted, so as to improve the detent torque of submersible pump 1, for overcoming load water pump
The moment of resistance, achieve the effect that submersible pump 1 securely and reliably starts.
Description of the drawings：
Fig. 1 is submersible pump typical case's startability curve and load water pump damping moment curve；
Fig. 2 is the utility model location drawing in power grid；
In Fig. 2：1 submersible pump, 2 monitorings, the electric-control system for promoting submersible pump startability, 3 transformers, 4 power supply electricity
Net, 5 switching capacitance controllers, 6 matching capacitances, 7 soft straters, 8 comprehensive protection devices, 9 motor speed velometers, 10 controllers.
Specific embodiment
Hereinafter reference will be made to the drawings, and the preferred embodiment of the utility model is described in detail.
Embodiment
A kind of electric-control system for being used to monitoring, being promoted submersible pump startability, including power supply grid 4, transformer 3 is thrown
Cut capacitance controller 5, matching capacitance 6, submersible pump 1, motor speed velometer 9, controller 10, the controller can calculate
The differential magnitude dn/dt of rotating speed acceleration, when the differential magnitude of rotating speed acceleration is less than definite value C, controller starts switching electricity
Hold controller, matching capacitance is put under the conditions of along polarity phase in circuit, after submersible pump start completion, controller breaks
Switching capacitance controller switches are opened, the definite value C is the value of motor load resistive torque.
Specifically, the electric-control system further includes soft strater 7, comprehensive protection device 8, and the soft strater is arranged at transformation
After device, before switching capacitance controller, the comprehensive protection device is arranged at cut capacitance controller after, before submersible pump.
Specifically, the motor speed velometer is any in magnetoelectric transducer, tachometer generator, rotary encoder
Kind, installation position is on the rotor of adapted motor.
Specifically, the controller is dsp controller.
Operation principle：When in 1 start-up course of submersible pump, being monitored to the micro component dn/dt of its rotating speed acceleration, when
Monitor this amount be less than certain value C when, C be motor load resistive torque value, i.e. dn/dt<C represents submersible pump 1 at this time
Torque starts difficulty, in the loop along polarity input by calculating and this submersible pump already close to load water pump resistive torque
Matched capacitance 6, the electric current increase in approximation LC oscillation circuits at this time, 1 receiving end B points voltage of submersible pump rises, according to latent
Water power pumps the characteristic of 1 adapted motor, and receiving end B points voltage linear rises, and can make the upper of 1 detent torque quadratic power of submersible pump
It rises, so as to improve the detent torque of submersible pump 1, to overcome the load water pump moment of resistance, while can ensure in higher level supply line
Electric current do not increase, to ensure the safe operation of supply transformer 3, after submersible pump start completion, controller disconnect switching
Capacitance controller switchs.
Claims (4)
1. a kind of electric-control system for being used to monitoring, being promoted submersible pump startability, it is characterised in that：Including power supply grid, become
Depressor, switching capacitance controller, matching capacitance, submersible pump, motor speed velometer, controller, the controller can calculate
Go out the differential magnitude dn/dt of rotating speed acceleration, when the differential magnitude of rotating speed acceleration is less than definite value C, controller starts switching
Capacitance controller puts into matching capacitance under the conditions of along polarity phase in circuit, after submersible pump start completion, controller
Switching capacitance controller switches are disconnected, the definite value C is the value of motor load resistive torque.
2. according to a kind of for monitoring, promoted the electric-control system of submersible pump startability, feature described in claim 1
It is：The electric-control system further includes soft strater, and comprehensive protection device, after the soft strater is arranged at transformer, switching is electric
Hold controller before, the comprehensive protection device is arranged at cut capacitance controller after, before submersible pump.
3. according to a kind of for monitoring, promoted the electric-control system of submersible pump startability, feature described in claim 1
It is：The motor speed velometer is magnetoelectric transducer, tachometer generator, any one of rotary encoder, installation position
On rotor for adapted motor.
4. according to a kind of for monitoring, promoted the electric-control system of submersible pump startability, feature described in claim 1
It is：The controller is dsp controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721091378.2U CN207377784U (en) | 2017-08-29 | 2017-08-29 | A kind of electric-control system for being used to monitoring, being promoted submersible pump startability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721091378.2U CN207377784U (en) | 2017-08-29 | 2017-08-29 | A kind of electric-control system for being used to monitoring, being promoted submersible pump startability |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207377784U true CN207377784U (en) | 2018-05-18 |
Family
ID=62343209
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721091378.2U Expired - Fee Related CN207377784U (en) | 2017-08-29 | 2017-08-29 | A kind of electric-control system for being used to monitoring, being promoted submersible pump startability |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207377784U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107327397A (en) * | 2017-08-29 | 2017-11-07 | 合肥恒大江海泵业股份有限公司 | A kind of electric-control system for being used to monitoring, being lifted submersible pump starting performance |
-
2017
- 2017-08-29 CN CN201721091378.2U patent/CN207377784U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107327397A (en) * | 2017-08-29 | 2017-11-07 | 合肥恒大江海泵业股份有限公司 | A kind of electric-control system for being used to monitoring, being lifted submersible pump starting performance |
| CN107327397B (en) * | 2017-08-29 | 2021-06-01 | 合肥恒大江海泵业股份有限公司 | Electric control system for monitoring and improving starting performance of submersible electric pump |
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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 |
Granted publication date: 20180518 Termination date: 20210829 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |