CN202737797U - Speed governing system of switched reluctance motor special for screw pump - Google Patents
Speed governing system of switched reluctance motor special for screw pump Download PDFInfo
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- CN202737797U CN202737797U CN 201220413246 CN201220413246U CN202737797U CN 202737797 U CN202737797 U CN 202737797U CN 201220413246 CN201220413246 CN 201220413246 CN 201220413246 U CN201220413246 U CN 201220413246U CN 202737797 U CN202737797 U CN 202737797U
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- speed governing
- switched reluctance
- screw pump
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Abstract
The utility model discloses a speed governing system of a switched reluctance motor special for a screw pump, which belongs to the field of a control system for oil extraction equipment in an oil field. The speed governing system comprises a controller, a power converter, a motor and a sensor, wherein the controller, the power converter, the motor and the sensor are arranged in a shell. The speed governing system is characterized in that the output end of the controller is connected with the control end of the power converter. The input end of the controller is connected with an external setter. The output end of the power converter is connected with the motor, and the input end of the power converter is connected with a power supply. The motor is a switched reluctance motor. The output shaft of the switched reluctance motor is connected with a screw pump. A position detector is arranged in the switched reluctance motor. The output ends of both a current detector and the position detector are connected with the input end of the controller respectively. Based on the analysis on the characteristics of a driving system for a screw pump adapted in an oil field and the requirements on the switched reluctance motor, the integrity and the consistency of existing switched reluctance motors are targeted to be improved. The speed governing system of the switched reluctance motor special for a screw pump has the advantages of large instantaneous power, strong overload capacity, good acceleration performance and wide speed regulation range.
Description
Technical field
The utility model provides a kind of screw pump Special switch magneto-resistance motor governing system, belongs to oil field equipment control system field.
Background technology
Screw pump oil production down-hole lifting efficiency is much higher than deep well pump, and general screw pump pump efficiency is 60%～70%, and this is that work characteristics by screw pump determines.Screw bolt well is because stable and uniform ground feed liquor and to exterior liquid during its work, what do not have the suction of deep well pump and discharge that two processes bring closes late once in a while, opens late and leakage phenomena once in a while, the series of problems such as one-stroke feed flow that also do not have deep well pump, these factors are the main causes that affect pump efficiency, therefore the screw pump lifting is higher than deep well pump with regard to the theory pump efficiency, and this extremely is conducive to the raising of down-hole hoisting system efficient.
The screw pump rotating mechanism is simple, is generally double reduction and rotates, and the gross mass of sensible moving component is low than oil pumper, and total transmission efficiency is higher; Oil pumper lifting transmission node is many, and the double reduction of reduction box is not only arranged, and also has the motion of four link transmissions and horse head.The efficient of oil pumper ground drive system is 70%～75% to the maximum, and screw pump work the time only is unidirectional rotary motion, and turn to consistent, gearbox structure is simple, only one-level belt transmission and one-level gear drive, machinery driving efficiency is high, and surface efficiency is higher than oil pumper far away generally 88%～92%.
Conventional screw pump ground drive system generally is comprised of asynchronous machine, belt and decelerator at present, the power output shaft of motor converts electrical energy into mechanical energy, and drive sucker rod by belt and decelerator through CUSTOM HOUSE HOTEL, thus drive the rotor of screw pump, realize the lifting of crude oil; There is the speed governing difficulty in such drive system, lower meeting shake running up, and belt transmission speed height causes the large and wearing and tearing aggravation of caloric value easily, add that reduction box needs often to safeguard, anti-reverse mechanism damages self and equipment easily, total is complicated, the shortcoming that on-the-spot installation exercise operation is loaded down with trivial details, efficient is lower.Adopt AC permanent magnet synchronous motor ground directly-driven screw pump extracting device of oil, because the motor own characteristic has also cut deceleration device, efficiently solve above-mentioned speed governing difficulty, safeguard the problem of reduction box, but have the problem that the demagnetization phenomenon occurs under the mal-condition of oil field easily.
The utility model content
According to above deficiency of the prior art, problem to be solved in the utility model is: provide a kind of overload capacity strong, power savings is remarkable, the simple and screw pump Special switch magneto-resistance motor governing system that haves a wide reach of speed governing.
The technical scheme that its technical problem that solves the utility model adopts is: screw pump Special switch magneto-resistance motor governing system, comprise the controller, power inverter, motor and the transducer that arrange in the housing, it is characterized in that: the output of described controller connects the control end of power inverter, and the input of controller connects outside given; The output of described power inverter connects motor, and its input connects power supply; Described motor is switched reluctance machines, the output shaft connecting screw rod pump of switched reluctance machines; Described transducer comprises current detector and position detector, and position detector is arranged on switched reluctance machines inside, and current detector is connected output and is connected respectively the input of controller with position detector.
The outside given output signal that mainly comprises control button and speed governing knob is processed through controller signals, is input to motor driver, the horsepower output of power ratio control converter, realize that control drives SRM rotating speed and moment of torsion, again by mechanical driving device, the drive screw pump.
Wherein preferred version is:
Voltmeter, tachometer and the ammeter of linear array are set on the described housing, voltmeter, tachometer and ammeter are connected controller, control button on the housing, control button comprise scram button, stop button, starting button and the speed governing knob of the control input end that connects controller.Display switch reluctance motor running status and realize motor starting, stop, anxious stopping and speed-regulating function.
Described speed governing knob comprises and discharges speed governing knob and work speed governing knob, discharges the input that speed governing knob and the speed governing knob of being connected connect respectively controller.Work speed governing knob is screw pump motor rotational speed regulation potentiometer.Turn clockwise, machine operation speed is accelerated; Otherwise machine operation speed is slack-off; Discharging the speed governing knob is screw pump motor brake speed regulator potentiometer.Turn clockwise, motor brake speed is accelerated; Otherwise motor brake speed is slack-off.
The beneficial effect that screw pump Special switch magneto-resistance motor governing system of the present utility model has is: characteristics by analyzing the screw pump in oilfield drive system and to the requirement of switched reluctance machines, targetedly existing SRD has been carried out the globality Improvement of Consistency, instantaneous power is large, overload capacity is strong, acceleration performance is good, and speed adjustable range is broad.On concrete:
1, improved the fluctuation problem of motor at low speed torque, power density is greatly improved, and the noise of motor decreases;
2, by the software of switched reluctance machines and the optimization of control circuit are improved, avoided the universal switch reluctance motor when commutation, the motor torque fluctuation is large, the shortcoming that noise is large;
3, low-speed and large-torque, the characteristics that starting current is little; In wider speed adjustable range and output power range, all have high whole efficiency, meet the requirement of screw pump.
Description of drawings
Fig. 1 is electrical principle block diagram of the present utility model;
Fig. 2 is the structural representation of housing of the present utility model;
Fig. 3 is controller principle block diagram of the present utility model;
Wherein: 1, housing 2, scram button 3, work speed governing knob 4, release speed governing knob 5, starting button 6, stop button 7, voltmeter 8, tachometer 9, ammeter.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is described further:
Embodiment 1:
As shown in Figure 1, native system comprises controller, power inverter, motor and transducer.
Comprise controller, power inverter, motor and the transducer of housing 1 interior setting, it is characterized in that: the output of described controller connects the control end of power inverter, and the input of controller connects outside given; The output of described power inverter connects motor, and its input connects power supply; Described motor is switched reluctance machines, the output shaft connecting screw rod pump of switched reluctance machines; Described transducer comprises current detector and position detector, and position detector is arranged on switched reluctance machines inside, and current detector is connected output and is connected respectively the input of controller with position detector.
The outside given output signal that mainly comprises control button and speed governing knob is processed through controller signals, is input to motor driver, the horsepower output of power ratio control converter, realize that control drives SRM rotating speed and moment of torsion, again by mechanical driving device, the drive screw pump.
As shown in Figure 2, voltmeter 7, tachometer 8 and the ammeter 9 of linear array are set on the housing 1, voltmeter 7, tachometer 8 are connected with ammeter and are connected controller, control button on the housing 1, control button comprise scram button 2, stop button 6, starting button 5 and the speed governing knob of the control input end that connects controller.Display switch reluctance motor running status and realize motor starting, stop, anxious stopping and speed-regulating function.
The speed governing knob comprises and discharges speed governing knob 4 and work speed governing knob 3, discharges the input that speed governing knob 4 and the speed governing knob 3 of being connected connect respectively controller.Work speed governing knob 3 is screw pump motor rotational speed regulation potentiometers.Turn clockwise, machine operation speed is accelerated; Otherwise machine operation speed is slack-off.Discharging speed governing knob 4 is screw pump motor brake speed regulator potentiometers.Turn clockwise, motor brake speed is accelerated; Otherwise motor brake speed is slack-off.
As shown in Figure 3, controller is by starting and given circuit, reference integrator, speed regulator, current regulator, pulse-width modulation circuit, current limit circuit and the energising logical circuit of single-chip microcomputer, digital-to-analog circuit and the connection of peripheral circuit signalization; Current signal is after over-current detector detects, and the input current amplitude limiter circuit is carried out stationarity and processed the logical circuit driving power converter output of passing through again to switch on; The relative position signal of rotor and stator is processed by the input speed adjuster that tests the speed after detecting through position detector, the output of the simultaneously relative position signal of rotor and stator input energising logical circuit driving power converter; Outside given signal is through starting and given circuit input, after reference integrator, speed regulator processing, input current adjuster control output current, the output of control pulse-width modulation circuit, the simultaneously output signal of speed regulator input energising logical circuit, consist of the speed and current double closed loop system, the output of driving power converter.
Its governing system belongs to the speed and current double closed loop system, regulates the voltage and current that is added on the SRM winding by pulse width modulation circuit, realizes the purpose of speed governing and speed stabilizing.Change the energising phase sequence by logical circuit and change turning to of SRM, and change electronic, the braking operating state of SRM by changing angle of overlap.Current limit has improved the Torque Ripple of SRM, realizes the trouble free service of control and SRM.In the controller kinds of protect and self-diagnosing function can also be set.Because the Single Chip Microcomputer (SCM) program alterability can satisfy the user easily in the multiple demand of the aspects such as SRM performance.By single-chip microcomputer in house software and peripheral control circuit, simulate real test, through double loop system control, the Motor torque fluctuation significantly reduces, the noise decrease, the software and the control circuit that have solved the universal switch reluctance motor are generally controlled the phase current of motor, cause switched reluctance machines when commutation, larger fluctuation appears in motor torque, also causes the problem of larger noise simultaneously.
The operation display circuit that the controller setting is made of voltmeter 7, tachometer 8 and ammeter 9, the input of operation display circuit connects the data output end of controller.Show respectively the three-phase input end phase voltage; Phase current and rotating speed.
Operation principle
Relative position information between the rotor that controller detects according to position detector, in conjunction with given action command (forward or reverse), the main switch element of the corresponding stator phase winding of conducting.There is electric current to flow through in the corresponding phase winding, produces magnetic field; Magnetic field always is tending towards " magnetic resistance minimum " and the magnetoresistive electromagnetic torque that produces makes rotor turn to " extremely to the utmost point " position.When rotor forwarded the rotor magnetic pole that is attracted to and coincides mutually (equilbrium position) with stator is excitatory, electromagnetic torque disappeared.This Time Controller, is given an order to power inverter when rotor is about to reach the equilbrium position according to new positional information, turn-offs the main switch element of current phase, and next phase of conducting, then rotor can rotate to next equilbrium position again; Like this, controller is pressed the continuously main switch of the corresponding phase winding of turn-on and turn-off of certain control logic according to corresponding positional information, just can produce the continuous same electromagnetic torque that turns to, and makes rotor continuously operation under certain rotating speed; Control the break-make moment of each phase winding and the size of winding current according to certain control strategy again, just system is moved in the best condition.
From top analysis as seen, without any impact, turning to the sense of current of motor is irrelevant on torque for sense of current, and only depends on the power-up sequence of phase winding.If power-up sequence changes, then turning to also of motor changes.For guaranteeing that motor can rotate continuously, position detector is wanted in time to provide rotor interpolar relative position, makes the controller can be in time and control exactly the break-make of each phase winding of stator, makes SRM can produce desired torque and rotational speed, reaches the performance requirement of expectation.
For the plugging control of screw pump, in order to ensure safety, possess 3 kinds in the control cubicle and shut down control mode.
1, orderly closedown control: in this manner, press stop botton by the user.After controller detected stopping signal, the magnetic field rotating direction of controlling immediately motor stator switched to reverse rotation by being rotated in the forward, and the motor torque direction transfers to oppositely from forward, thus the direction of rotation of screw rod also from the forward reduction of speed to zero, and beginning reverse rotation.Rotary speed is given by controller, and given range is generally 50-200RPM.Screw rod causes speed to rise rapidly, and the trend above given speed is arranged owing to the reverse torsion that self-deformation produces.When screw speed during greater than the controller given speed, the conducting of controller control stator coil constantly, making the torsion direction is forward, the torsion that namely produces with the screw rod distortion is opposite, thereby has suppressed the rising of screw speed.Controller detects the motor direction of rotation at any time, speed, and the torsion direction makes screw rod under any given controlled speed, and the energy slow release is until discharge complete.Discharge complete after, controller is in stopped status, waits for again starting.
2, the controller shutdown control of breaking down: there is the controlled full-wave rectifying circuit of a three-phase control cubicle inside, and the A phase coil of motor is received in its direct current output.Its output voltage can pass through a potentiometer adjustment.When controller broke down, this direct current was received motor A phase, prevented that stall from appearring in motor.
3, external power source outage control: after the external power source outage, because the existence of controller internal capacitance, control system keeps normal operation in the short time.After the external power source outage, control system is moved immediately, makes motor switch to reverse rotation by being rotated in the forward rapidly.Under no-load condition, this transfer process is 3-5 second.Carry in the situation at band, because the reverse torsion of screw rod, the band process of carrying is less than unloaded change-over time change-over time.
After entering this state, the conducting of controller control stator coil makes motor be in the dynamic brake state constantly, and how much relevant with inverted speed energy output is.Speed is higher, and energy output is larger, otherwise less.And this speed is given by the user, and is arbitrarily adjustable, by regulating this speed, can control arbitrarily what of energy output.The electric energy that motor sends is by the continued flow tube ramp metering device internal capacitance of controller inside.And the stored electric energy of this electric capacity offers this control system, to guarantee its normal operation.When energy output was excessive, controller opens IGBT brake pipe was connected external capacitive, and energy is consumed externally on the resistance.
Its course of work is identical with orderly closedown.In fact, during orderly closedown, outside three-phase input power electric current is 0, is out-of-work.The energy that generating produces is far longer than the required energy of system's normal operation, and needs to discharge by outside high-power resistance.
Above embodiment is this patent preferred embodiments, and other distortion execution modes that those skilled in the art associate under the thought of this patent is guided are also in this protection range.
Claims (3)
1. a screw pump Special switch magneto-resistance motor governing system comprises the controller, power inverter, motor and the transducer that arrange in the housing (1), it is characterized in that:
The output of described controller connects the control end of power inverter, and the input of controller connects outside given;
The output of described power inverter connects motor, and its input connects power supply;
Described motor is switched reluctance machines, the output shaft connecting screw rod pump of switched reluctance machines;
Described transducer comprises current detector and position detector, and position detector is arranged on switched reluctance machines inside, and current detector is connected output and is connected respectively the input of controller with position detector.
2. screw pump Special switch magneto-resistance motor governing system according to claim 1, it is characterized in that: voltmeter (7), tachometer (8) and ammeter (9) that linear array is set on the described housing (1), voltmeter (7), tachometer (8) are connected 9 with ammeter) the connection controller, the upper control button of housing (1), control button comprises scram button (2), stop button (6), starting button (5) and the speed governing knob of the control input end that connects controller.
3. screw pump Special switch magneto-resistance motor governing system according to claim 2, it is characterized in that: described speed governing knob comprises and discharges speed governing knob (4) and work speed governing knob (3), and release speed governing knob (4) and the speed governing knob (3) of being connected connect respectively the input of controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220413246 CN202737797U (en) | 2012-08-20 | 2012-08-20 | Speed governing system of switched reluctance motor special for screw pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220413246 CN202737797U (en) | 2012-08-20 | 2012-08-20 | Speed governing system of switched reluctance motor special for screw pump |
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| Publication Number | Publication Date |
|---|---|
| CN202737797U true CN202737797U (en) | 2013-02-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220413246 Expired - Fee Related CN202737797U (en) | 2012-08-20 | 2012-08-20 | Speed governing system of switched reluctance motor special for screw pump |
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| Country | Link |
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| CN (1) | CN202737797U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105114335A (en) * | 2015-08-06 | 2015-12-02 | 中国石油天然气集团公司 | Anti-reverse device of electric submersible pump |
| CN106679972A (en) * | 2017-01-12 | 2017-05-17 | 北京理工大学 | Torsional vibration testing rack with overload protection function |
| CN114123670A (en) * | 2022-01-24 | 2022-03-01 | 欧胜(东营)环保科技有限责任公司 | Special large-torque variable-power reluctance motor for oil pumping unit in oil field |
-
2012
- 2012-08-20 CN CN 201220413246 patent/CN202737797U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105114335A (en) * | 2015-08-06 | 2015-12-02 | 中国石油天然气集团公司 | Anti-reverse device of electric submersible pump |
| CN105114335B (en) * | 2015-08-06 | 2017-05-17 | 中国石油天然气集团公司 | Anti-reverse device of electric submersible pump |
| CN106679972A (en) * | 2017-01-12 | 2017-05-17 | 北京理工大学 | Torsional vibration testing rack with overload protection function |
| CN114123670A (en) * | 2022-01-24 | 2022-03-01 | 欧胜(东营)环保科技有限责任公司 | Special large-torque variable-power reluctance motor for oil pumping unit in oil field |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: ZIBO JINGKE ELECTRIC INSTITUTE Free format text: FORMER OWNER: GUO YUANSHENG Effective date: 20130530 Free format text: FORMER OWNER: LI MINGXIAN DONG YIPENG YANG JIANWEI LI YAN Effective date: 20130530 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 721001 BAOJI, SHAANXI PROVINCE TO: 255086 ZIBO, SHANDONG PROVINCE |
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| TR01 | Transfer of patent right |
Effective date of registration: 20130530 Address after: 255086, A, block 135, No. 306, Zibo hi tech Zone, Shandong, China Patentee after: ZIBO JINGKE ELECTRICAL INSTITUTE Address before: 721001 Baoji province Shaanxi City Jintai District Road No. 102 Building No. 5 Po Patentee before: Guo Yuansheng Patentee before: Li Mingxian Patentee before: Dong Yipeng Patentee before: Yang Jianwei Patentee before: Li Yan |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130213 Termination date: 20210820 |
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| CF01 | Termination of patent right due to non-payment of annual fee |