CN205754107U - A kind of motor dynamics star-delta conversion energy-conserving device - Google Patents
A kind of motor dynamics star-delta conversion energy-conserving device Download PDFInfo
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- CN205754107U CN205754107U CN201620549463.8U CN201620549463U CN205754107U CN 205754107 U CN205754107 U CN 205754107U CN 201620549463 U CN201620549463 U CN 201620549463U CN 205754107 U CN205754107 U CN 205754107U
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- electric machine
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Abstract
The utility model discloses a kind of motor dynamics star-delta conversion energy-conserving device in oil field equipment field, it is connected to the three phase electric machine on three phase mains including through main circuit breaker, the first combination switch and the 4th contactless contactor it is parallel with on three phase electric machine, the front end of three phase electric machine is connected with main circuit breaker, the tail end of three phase electric machine connects the second combination switch, on circuit between three phase electric machine and main circuit breaker, side is connected to the 3rd contactless contactor, the tail end of the 3rd catalyst is connected to compensate electric capacity, this utility model simple in construction, easy to control, decrease the input of manpower, reduce production cost, improve automaticity, there is higher cost performance, can be used in pumping-unit motor control.
Description
Technical field
This utility model relates to a kind of circuit for controlling motor, particularly to a kind of pumping-unit motor control circuit.
Background technology
At present, what China mainly applied in oil field is beam pumping unit, its simple in construction, and reliability is high, working service side
Just, adapt to severe field working conditions, but, it operationally can waste substantial amounts of electric energy, is the most all the consumption in oil field
TV university family, its power consumption accounts for the 40% of oil field total electricity consumption, and therefore, the efficiency improving beam pumping unit reduces the damage of electric energy
Consumption is very important.
The main cause of oil-field oil pumper highly energy-consuming has following: load when (1) is in order to make oil pumper start and run
Ability reaches requirement.Therefore oil pumper is had to the motor of adapted relatively high power, and this has resulted in great majority in running
In the case of motor to be in light condition, operational efficiency and power factor the lowest.(2) beam-pumping unit is in running
Balanced ratio is relatively low, causes the current transformation between motor uneven, and which increasing the interior of motor can consume, and reduces operational efficiency.
(3) when the load and energy of oil pumper fluctuates bigger, although this machine can be properly functioning, but the speed of its reduction box will exceed
Its actuating speed, oil pumper will generate electricity by drive motor, from motor principle, at the electronic and transformation process of generating
Middle motor is just in efficiency lowest segment, whole during the efficiency of energy conversion the lowest.
The above reason causes oil pumper energy consumption excessive, and the electricity charge of oil mining consume high.The most conventional
Power save mode has following several:
(1) use Energy-saving reformation type oil pumper: new pumping unit through test for many years, major part due to design, quality,
The reason of the aspect such as safety, Operation and Maintenance, reliability can not reach the requirement in oil field far away and be eliminated, and only minority type exists
New oil field promoted, and the good energy-saving effect taken.But domestic also have substantial amounts of OW.Change these dark soy sauce
Oil machine is unpractical, can only reduce energy consumption saves energy by other means.
(2) use other motors replace asynchronous machine:
A) magneto is used: magneto has the advantages that operational efficiency is high, power factor is high, detent torque is big, can
To play good energy-saving effect, but, magneto can demagnetize in use for some time, and now the efficiency of motor can be significantly
Reduce.
B) high slip motor is used: the output of on-the-spot most motors is 20%～about 30%.To common electricity
For motivation, so running, its efficiency and power factor spy are low.From the point of view of super-high slip ratio multiple-speed motor, owing to curve is put down
Smooth, η and cos ψ is under load situation of change, and the change of its value is little, thus itself η and cos ψ is higher than common motor comparatively speaking,
Causing active power to reduce, power factor improves.But, super-high slip ratio motor power saving to be used, object must be that vibration carries
The well that lotus is big.
(3) energy-saving electric device is used
A) silicon-controlled voltage regulation: although using bidirectional thyristor to achieve stator voltage continuously adjusting with load change, joint
Electricity effect is preferable, but source current waveform is distorted, and harmonic pollution in electric power net is serious, additionally under the adverse circumstances in oil field,
Its reliability etc. is all restricted.Structure is complicated simultaneously, relatively costly.
B) frequency control: can be according to the liquid outlet quantity of oil well, the rotating speed of self-regulation motor adjusts power, reaches joint
The purpose of energy, its defect is that equipment cost is higher, and control system is complicated, works under the adverse circumstances in oil field, and its reliability is prevented
Steal to wait and be all a problem
C) Y/ △ conversion: when motor is properly functioning, stator winding is delta connection, is Y connection during starting.Winding during starting
Voltage is the radical sign 1/3rd of electrical network rated line voltage, and starting voltage reduces, and when close to rated speed, stator winding is changed
For delta connection, controlling simple, but start every time and need manual intervention, pressure relief ranges is certain, and purposes is restricted.
Utility model content
The purpose of this utility model is to provide a kind of motor dynamics star-delta conversion energy-conserving device, its simple in construction,
Low cost, easy to use, reliable, cost performance is high.
The purpose of this utility model is achieved in that a kind of motor dynamics star-delta conversion energy-conserving device, including
It is connected to the three phase electric machine on three phase mains through main circuit breaker, described three phase electric machine is parallel with the first combination switch and the 4th and connects
Tentaculum switchs, and the front end of described three phase electric machine is connected with main circuit breaker, and the tail end of three phase electric machine connects the second combination switch, institute
Stating side on the circuit between three phase electric machine and main circuit breaker and be connected to the 3rd contactless contactor, the tail end of described 3rd catalyst is connected to
Compensate electric capacity.
During utility model works, promising Three models: " non-control ", " controlled ", " fault "；
" non-control " pattern: in such a mode, the 4th contactless contactor Guan Bi, other switching devices are all off, now electricity
Machine is operated in delta connection, and cannot carry out any switching.System is in non-power save mode；
" controlled " pattern: in such a mode, the 4th contactless contactor disconnects, and energy conserving system comes into operation, according to motor
Parameter, the connection of switch motor, the first combination switch Guan Bi, rest switch device disconnects and being then operated under delta connection, as
Really second on-load switch Guan Bi, rest switch device disconnect, then be operated under wye connection, motor can dynamic translation, Qi Zhong
Three contactless contactors can carry out reactive-load compensation on the spot according to current power factor and improve power factor and reduce loss motor,
Motor can be made to operate in optimum state by these measures, it is achieved the Energy Saving Control of system；
" fault " pattern: this pattern occur, illustrates that energy-saving control system there occurs fault, and any one control system has
The probability broken down, then how handling failure just seem particularly significant, this utility model once breaks down and (includes electricity
Source fault, the fault such as control chip), system can automatically control the 4th contactless contactor Guan Bi, and other switches are all off, it is ensured that
Motor is appointed and so can normally be worked.
Compared with prior art, the beneficial effects of the utility model are, this utility model simple in construction, easy to control,
Decrease the input of manpower, reduce production cost, improve automaticity, there is higher cost performance.This utility model
Can be used in pumping-unit motor control.
In order to improve the stability that this utility model runs, extend its service life, described first combination switch, second multiple
Combination switch structure is identical, and single-phase switch is formed by double-thyristor, magnetic latching relay switch in parallel.Traditional contactless contactor
Electric arc can be produced in handoff procedure, motor and switch itself can be produced injury, can be allowed by this compound structure
Switch carries out zero passage conversion, does not substantially have the generation of electric arc, can improve the service life of switching device, can allow motor simultaneously
Smooth transition, will not produce injury to motor.
Accompanying drawing explanation
Fig. 1 is this utility model circuit theory diagrams.
Fig. 2 is the first compound switch structure schematic diagram in this utility model.
Detailed description of the invention
A kind of motor dynamics star-delta conversion energy-conserving device as shown in Figure 1-2, is connected to including through main circuit breaker
Three phase electric machine on three phase mains, three phase electric machine is parallel with the first combination switch K1 and the 4th contactless contactor K4, three-phase electricity
The front end of machine is connected with main circuit breaker, and the tail end of three phase electric machine connects the second combination switch K2, three phase electric machine and main circuit breaker
Between circuit on other be connected to the 3rd contactless contactor K3, the tail end of the 3rd catalyst K3 is connected to compensate electric capacity C1, C2, C3, the
One combination switch K1, the second combination switch K2 structure are identical, and single-phase switch is by double-thyristor SCR, magnetic latching relay switch K
It is formed in parallel.
When utility model normally comes into operation, now the 4th contactless contactor K4 is off, and one powers on, and first closes
Main circuit breaker, motor just starts when, owing to the special operation condition now motor of oil pumper needs the biggest torque, so opening
Under dynamic state, the first combination switch K1 Guan Bi, the second combination switch K2 disconnect, and motor is operated under triangle state；Work as motor
Starting smoothly under the situation that rear motor is i.e. operated in underloading, now, energy-saving controller can be according to the Rated motor parameter set, certainly
The power switched that dynamic searching is optimal, after the running status of motor arrives this switching value, controller can be automatically converted into star-like connecing
Method, now the first combination switch K1 disconnects, the second combination switch K2 closes, it is achieved Energy Saving Control；If the power of motor becomes big,
Wye connection can not meet the demand of power, is converted into delta connection the most immediately.If system jam, turn off the most immediately
First combination switch K1, the second combination switch K2, the 3rd contactless contactor K3, and allow the 4th contactless contactor Operating In Persistent Current Mode,
Guarantee system properly functioning.
This utility model is not limited to above-described embodiment, on the basis of technical scheme disclosed in this utility model, this
The technical staff in field is according to disclosed technology contents, it is not necessary to performing creative labour just can be special to some of which technology
Levying and make some replacements and deformation, these are replaced and deformation is all in protection domain of the present utility model.
Claims (2)
1. a motor dynamics star-delta conversion energy-conserving device, it is characterised in that include being connected to three-phase through main circuit breaker
Three phase electric machine on power supply, described three phase electric machine is parallel with the first combination switch and the 4th contactless contactor, described three-phase electricity
The front end of machine is connected with main circuit breaker, and the tail end of three phase electric machine connects the second combination switch, described three phase electric machine and main open circuit
On circuit between device, side is connected to the 3rd contactless contactor, and the tail end of described 3rd catalyst is connected to compensate electric capacity.
A kind of motor dynamics star-delta conversion energy-conserving device the most according to claim 1, it is characterised in that described the
One combination switch, the second compound switch structure are identical, single-phase switch by double-thyristor, magnetic latching relay switch in parallel and
Become.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620549463.8U CN205754107U (en) | 2016-06-08 | 2016-06-08 | A kind of motor dynamics star-delta conversion energy-conserving device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620549463.8U CN205754107U (en) | 2016-06-08 | 2016-06-08 | A kind of motor dynamics star-delta conversion energy-conserving device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205754107U true CN205754107U (en) | 2016-11-30 |
Family
ID=57361418
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620549463.8U Expired - Fee Related CN205754107U (en) | 2016-06-08 | 2016-06-08 | A kind of motor dynamics star-delta conversion energy-conserving device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205754107U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111371372A (en) * | 2020-04-16 | 2020-07-03 | 广东美的制冷设备有限公司 | Motor connecting circuit, driving circuit, method, medium, system and air conditioner |
-
2016
- 2016-06-08 CN CN201620549463.8U patent/CN205754107U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111371372A (en) * | 2020-04-16 | 2020-07-03 | 广东美的制冷设备有限公司 | Motor connecting circuit, driving circuit, method, medium, system and air conditioner |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| 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: 20161130 Termination date: 20190608 |