CN114123670A - Special large-torque variable-power reluctance motor for oil pumping unit in oil field - Google Patents
Special large-torque variable-power reluctance motor for oil pumping unit in oil field Download PDFInfo
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- CN114123670A CN114123670A CN202210081023.4A CN202210081023A CN114123670A CN 114123670 A CN114123670 A CN 114123670A CN 202210081023 A CN202210081023 A CN 202210081023A CN 114123670 A CN114123670 A CN 114123670A
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- driving device
- detection driving
- oil
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/21—Devices for sensing speed or position, or actuated thereby
- H02K11/215—Magnetic effect devices, e.g. Hall-effect or magneto-resistive elements
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/085—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/21—Devices for sensing speed or position, or actuated thereby
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/25—Devices for sensing temperature, or actuated thereby
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/30—Structural association with control circuits or drive circuits
Abstract
The invention relates to the technical field of special high-torque variable-power reluctance motors for oil pumping units in oil fields, in particular to a special high-torque variable-power reluctance motor for oil pumping units in oil fields, which comprises a motor shell, wherein a detection driving device and a control device are arranged inside the motor shell, an emergency braking button connected with the control device is arranged outside the motor shell, the control device is connected with an external terminal through radio, the emergency braking button and the control device control the detection driving device to be in single-phase conduction, an operator only needs to operate at a safe distance, electromagnetic braking is rapid and reliable, the oil pumping units are matched and fixed by a mechanical braking device after being stopped stably, the requirements of abnormal emergency braking and normal maintenance are greatly facilitated, and the safety of stopping operation is guaranteed.
Description
Technical Field
The invention relates to the technical field of a large-torque variable-power reluctance motor special for an oil pumping unit in an oil field, in particular to a large-torque variable-power reluctance motor special for an oil pumping unit in an oil field.
Background
The existing oil pumping units in oil fields have various models, such as a beam type oil pumping unit, a tower frame type oil pumping unit, a screw type oil pumping unit and the like, wherein the beam type oil pumping unit is a prime power type oil pumping unit.
The mounting position that the reluctance motor corresponds beam-pumping unit is narrow and small, reserves in the inside of reluctance motor hollow shaft position sensor's mounting position during, need special finish machining, the installation accuracy requires highly.
The existing pumping unit braking mode is a mechanical braking mode, operators need to approach the pumping unit when the pumping unit is not stopped, and the mechanical braking device is controlled to perform friction braking on the pumping unit, so that the existing pumping unit braking mode is extremely unsafe, and human casualty accidents happen for many times.
Disclosure of Invention
The invention aims to provide a large-torque variable-power reluctance motor special for an oil pumping unit in an oil field, and aims to solve the technical problems that in the prior art, the braking mode of the oil pumping unit is a mechanical braking mode, operators need to approach the oil pumping unit when the oil pumping unit is not stopped, and the mechanical braking device is controlled to perform friction braking on the oil pumping unit, so that the oil pumping unit is extremely unsafe and has human casualty accidents for many times.
In order to achieve the purpose, the high-torque variable-power reluctance motor special for the oil pumping unit in the oil field comprises a detection driving device and a control device, wherein the detection driving device is used for detecting the running state data of the motor; the control device is used for acquiring running state data of the motor for analysis and controlling the detection driving device to act; the detection driving device is also used for starting and stopping or braking the motor.
The detection driving device comprises a motor shell, a stator core, a rotor core and a magnetic induction coil, wherein the stator core is fixedly arranged in the motor shell; the rotor iron core is rotatably arranged on the motor shell and is positioned in the stator iron core; the stator core sleeve is provided with the magnetic induction coil.
The detection driving device further comprises a position sensor, and the position sensor is arranged on one side, close to the rotor core, of the motor shell and is connected with a signal transmitter.
The detection driving device further comprises a current sensor, wherein the current sensor is arranged on one side, close to the magnetic induction coil, of the motor shell, is connected with the control device and is used for detecting the current value of the detection driving device.
The detection driving device further comprises an abnormal large current sensor, and the abnormal large current sensor is connected with the control device and used for detecting the abnormal large current value of the detection driving device.
The control device is used for acquiring a current value, and controlling the brake current amount of the detection driving device to increase when the current value is rapidly attenuated by normal large current; when the current value rapidly rises to a normal current value, controlling the driving current amount of the detection driving device to increase; the motor is also used for acquiring abnormal large current, and when the acquired current value exceeds a threshold value, the motor is controlled to be shut down in a protective and safe manner.
The control device is also used for acquiring the flow of the extract liquid through an extract liquid flow sensor, and controlling the pumping unit to stop when the sprint is reduced to a preset minimum value; and when the machine is stopped for a preset time, controlling the oil pumping unit to work.
The detection driving device further comprises a stator magnetic blocking ring and a rotor magnetic blocking ring, and the stator magnetic blocking ring is arranged between the stator iron core and the motor shell; the rotor magnetic blocking ring is arranged between the rotor iron core and the motor shell.
The invention relates to a special high-torque variable-power reluctance motor for an oil pumping unit in an oil field, which comprises a motor shell, wherein a driving device and a control device are arranged in the motor shell, an emergency braking button connected with the control device is arranged on the outer side of the motor shell, the control device is connected with an external terminal through radio, the emergency braking button and the control device control the driving device to be conducted in a single phase, an operator only needs to operate at a safe distance, electromagnetic braking is rapid and reliable, the pumping unit is matched and fixed by a mechanical braking device after being stopped stably, the requirements of abnormal emergency braking and normal maintenance are greatly facilitated, and the safety of stopping operation is guaranteed.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a detection driving device of the present invention.
Fig. 2 is a schematic view of the installation structure of the rotor magnetic shielding ring of the present invention.
Fig. 3 is a schematic view of the internal structure of the motor case of the present invention.
Fig. 4 is a schematic connection diagram of the control device of the present invention.
In the figure: the device comprises a motor 1, a motor 2, a detection driving device 3, a control device 6, a position sensor 7, a current sensor 8, an abnormal large current sensor 9, a liquid drawing flow sensor 21, a stator iron core 22, a rotor iron core 23, a magnetic induction coil 24, a stator magnetic blocking ring 25, a rotor magnetic blocking ring and a signal transmitter 32.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Further, in the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Referring to fig. 1, fig. 2, fig. 3 and fig. 4, the present invention provides a high torque variable power reluctance motor for an oil pumping unit in an oil field, which includes a detection driving device 2 and a control device 3, wherein the detection driving device 2 is used for detecting the operation state data of the motor; the control device 3 is used for acquiring running state data of the motor for analysis and controlling the detection driving device 2 to act; the detection driving device 2 is also used for starting and stopping or braking the motor.
In this embodiment, control panel is installed in the outside of motor casing 1, installs direct control on control panel detect drive arrangement 2's emergency braking button to and through the indirect control of remote input signal controlling means 3, controlling means 3 and emergency braking button control reluctance motor are single-phase to switch on for reluctance motor becomes the electro-magnet in the twinkling of an eye, realizes the emergency electromagnetic braking to the beam-pumping unit, and current beam-pumping unit braking mode is mechanical brake formula braking mode. The operator needs to approach the operation when the pumping unit is not stopped, which is extremely unsafe and causes human casualty accidents for many times. Meanwhile, the conventional pumping unit braking mode cannot realize emergency braking under special conditions; the pumping unit in the technical scheme controls the descending speed of the pumping rod to slow, so that accidents such as hair braid falling off, polished rod bending and even breaking caused by resistance formed by underground oil thickening, wax deposition and the like are effectively prevented; the pumping unit in the technical scheme controls the pumping unit to be fast when rising, thereby effectively preventing the oil leakage of the plunger pump and reducing the accident and the pumping efficiency loss; the intelligent slow shutdown function of the reluctance motor well protects a sucker rod string, a plunger pump and the like of the oil pumping unit, greatly prolongs the overhaul operation period of the oil pumping unit and has obvious benefits; the reluctance motor of the invention realizes the self-adaptive effect-increasing operation of the oil pumping unit, obviously improves the operation efficiency of the oil pumping unit, has obvious electricity-saving effect, and comprises the following steps: the original matched dragging motor of the same oil well is a 37KW rare earth permanent magnet synchronous motor, and the sucker rod is punched for 4 times/minute. When the motor is used, under the working condition that the liquid production amount is basically maintained unchanged, the number of spurs is reduced to 0.85 times/minute, the power consumption is reduced by 60 percent, the abrasion of a pump rod is obviously reduced, and the operation pump inspection period is greatly prolonged; the ratio of the radial length to the axial length of the reluctance motor is more than 4.0, the magnetic flux leakage caused by the extension part of the concentrated winding end part is higher than that of the motor with the traditional structure, the electromagnetic efficiency of the motor is reduced, and the electromagnetic noise is increased; because the over-current capability and the high-voltage resistance of SiC are far higher than that of Si, the volume of the improved controller is greatly reduced by using the SiC-based IGBT, and is only about one fourth of the original volume, and the voltage resistance and the over-current capability are improved by three times to the maximum. Meanwhile, the requirements of various voltage grades (380V/660V/1140V/2200V) and different power reluctance motors of the oil field can be met by fewer types of controllers, and the equipment purchase and maintenance cost is greatly reduced; after the test shows that the magnetic blocking ring is added under the same condition, the maximum power of the motor can be improved by 10.2 percent, the temperature rise is reduced by 8.6 ℃, and the electromagnetic noise is reduced by 40db to the maximum. The energy-saving and noise-reducing effect is obvious; according to the electromagnetic braking function of the invention, an operator only needs to operate at a safe distance, the braking is rapid and reliable, the pumping unit can be controlled to stop at a desired position, and the pumping unit is matched and fixed by the mechanical braking device after being stopped stably, so that the requirements of abnormal emergency braking and normal maintenance are greatly facilitated, and the safety of the shutdown operation is ensured.
Further, referring to fig. 1, fig. 2 and fig. 3, the detection driving device 2 includes a motor housing 1, a stator core 21, a rotor core 22 and a magnetic induction coil 23, wherein the stator core 21 is fixedly installed in the motor housing 1; the rotor core 22 is rotatably mounted on the motor housing 1 and is located in the stator core 21; the stator core 21 is sleeved with the magnetic induction coil 23.
Further, referring to fig. 1, fig. 2 and fig. 3, the detection driving device 2 further includes a stator magnetic shielding ring 24 and a rotor magnetic shielding ring 25, wherein the stator magnetic shielding ring 24 is disposed between the stator core 21 and the motor housing 1; the rotor magnetic shielding ring 25 is disposed between the rotor core 22 and the motor housing 1.
In the present embodiment, the stator magnetic shielding ring 24 and the rotor magnetic shielding ring 25 are both made of non-magnetic conductive metal materials, the stator magnetic shielding ring 24 is fixedly installed on the inner side wall of the motor housing 1, and the stator magnetic shielding ring 24 is sleeved on the outer side of the stator core 21; rotor keeps off the magnetosphere 25 and installs rotor core 22's tip, and be connected stator core 21 is last, rotor core 22 twines and has magnetic induction coil 23, and then through setting up stator keeps off magnetosphere 24 with the magnetosphere 25 is kept off to the rotor, can effectively prevent the magnetic leakage.
Further, referring to fig. 1 and 4, the detection driving device 2 further includes a position sensor 6, and the position sensor 6 is disposed on a side of the motor housing 1 close to the rotor core 22 and connected to a signal transmitter 32.
In the embodiment, the existing pumping units in the oil field have various models, such as a beam type pumping unit, a tower type pumping unit, a screw type pumping unit and the like, wherein the beam type pumping unit is a main power type pumping unit. The installation position of the reluctance motor corresponding to the beam pumping unit is narrow, and when the installation position of the position sensor 6 is reserved in the hollow shaft of the reluctance motor, special fine machining is needed, and the installation precision requirement is high. The position sensor 6 which is separated from the reluctance motor is specially designed, for a beam pumping unit, the position sensor 6 is directly arranged on the other side of the input shaft of the speed reducer of the pumping unit, which corresponds to the installation position of the motor, and the position sensor is rotatably arranged by utilizing the original threads of the input shaft, the input shaft does not need to be additionally machined and modified, the installation is simple and convenient, and the additional cost is not increased. The split position sensor 6 has wide adaptability and economical efficiency for other types of pumping units; the reluctance motor of the invention realizes the independent control of the ascending and descending speeds of the sucker rod; the position sensor 6 can be installed at the other end of the input shaft of the speed reducer corresponding to the installation position of the motor in a split mode so as to meet the installation requirements of various types of pumping units; for the beam-pumping unit, the position sensor 6 is directly installed on the other side corresponding to the installation position of the motor on the input shaft of the speed reducer of the pumping unit, the input shaft is rotatably installed by utilizing the original threads of the input shaft, the input shaft does not need to be additionally machined and transformed, the installation is simple and convenient, and extra cost is not increased.
Further, referring to fig. 4, the detection driving device 2 further includes a current sensor 7, and the current sensor 7 is disposed on a side of the motor housing 1 close to the magnetic induction coil 23, and connected to the control device 3, and is configured to detect a current value of the detection driving device 2.
In the embodiment, the power of the dragging motor of the pumping unit is about 30kw generally, when the sucker rod is lifted upwards, the current of the motor is about 20A, and when the sucker rod descends, the current is almost zero. By utilizing the characteristic, the invention is provided with the current sensor 7 at the power supply input end of the motor, and the current sensor 7 and the driving power pipe form a closed-loop control subsystem. When the pumping unit normally operates and the current value of the motor is quickly attenuated by normal large current, the pumping rod starts to move downwards from the top dead center, at the moment, the subsystem can increase the braking current, and the speed is controlled to be reduced to a set value when the pumping rod moves downwards. When the current value of the motor is increased from almost zero to a normal current value, the sucker rod is indicated to move upwards from the bottom dead center, and the supply amount of the driving current is increased by the subsystem.
Further, referring to fig. 4, the detection driving device 2 further includes an abnormal large current sensor 8, and the abnormal large current sensor 8 is connected to the control device 3 and is configured to detect an abnormal large current value of the detection driving device 2.
In the embodiment, when the pumping unit loses balance, the current of the motor is abnormally and greatly increased, the special abnormal large current sensor 8 is additionally arranged, the controller controls the motor to be safely shut down in a protective manner according to signals transmitted by the abnormal large current sensor 8, the abnormal large current protection function is reliable in action, and accidents caused by the loss of balance of the pumping unit can be avoided.
Further, referring to fig. 4, the control device 3 is configured to obtain a current value, and when the current value is rapidly attenuated by a normal large current, control the amount of brake current of the detection driving device 2 to increase; when the current value rapidly rises to the normal current value, controlling the drive current amount of the detection drive device 2 to increase;
the motor is also used for acquiring abnormal large current, and when the acquired current value exceeds a threshold value, the motor is controlled to be shut down in a protective and safe manner;
in this embodiment, the control device 3 acts on the conducting phase of the magnetic induction coil 23 of the reluctance motor in one point period through the driving power tube, and the signal transmitter 32 is connected with the driving power tube through a conducting wire and is connected with an external terminal, so that the external terminal receives and controls the conducting phase of the driving power tube.
Further, referring to fig. 4, the control device 3 is further configured to obtain a flow rate of the pumping liquid through a pumping liquid flow rate sensor 9, and when the sprint is lowered to a preset minimum value, control the pumping unit to stop; and when the machine is stopped for a preset time, controlling the oil pumping unit to work.
In this embodiment, the pump-out liquid flow sensor 9 is installed at the outlet of the pump-out liquid well and forms a closed-loop control subsystem with the controller. The subsystem adjusts the rotating speed of the motor through the flow of the extract outlet, thereby adjusting the sprint of the pumping unit. When the sprint is low to the preset minimum value and has no running value, the subsystem controls the oil pumping unit to automatically stop by controlling the motor. When the system is stopped to the preset time and underground oil is fully permeated and enriched, the subsystem controls the automatic starting of the pumping unit through the control motor, so that the self-adaptive effect-improving operation of the pumping unit is realized.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (8)
1. The large-torque variable-power reluctance motor special for the oil pumping unit in the oil field is characterized by comprising a detection driving device and a control device, wherein the detection driving device is used for detecting the running state data of the motor; the control device is used for acquiring running state data of the motor for analysis and controlling the detection driving device to act; the detection driving device is also used for starting and stopping or braking the motor.
2. The special high-torque variable-power reluctance motor for the oil pumping unit in the oil field according to claim 1, wherein the detection driving device comprises a motor shell, a stator core, a rotor core and a magnetic induction coil, and the stator core is fixedly arranged in the motor shell; the rotor iron core is rotatably arranged on the motor shell and is positioned in the stator iron core; the stator core sleeve is provided with the magnetic induction coil.
3. The high-torque variable-power reluctance motor special for the oil pumping unit in the oil field according to claim 2, wherein the detection driving device further comprises a position sensor, and the position sensor is arranged on one side of the motor shell close to the rotor core and connected with a signal transmitter.
4. The high-torque variable-power reluctance motor special for the oil pumping unit in the oil field according to claim 2, wherein the detection driving device further comprises a current sensor, the current sensor is arranged on one side of the motor shell close to the magnetic induction coil and connected with the control device, and is used for detecting the current value of the detection driving device.
5. The high-torque variable-power reluctance motor special for the oil pumping unit in the oil field according to claim 1, wherein the detection driving device further comprises an abnormal high-current sensor, and the abnormal high-current sensor is connected with the control device and used for detecting the abnormal high-current value of the detection driving device.
6. The special high-torque variable-power reluctance motor for the oil pumping unit in the oil field according to claim 1, wherein the control device is used for acquiring a current value, and controlling the brake current of the detection driving device to increase when the current value is rapidly attenuated by a normal large current; when the current value rapidly rises to a normal current value, controlling the driving current amount of the detection driving device to increase;
the motor is also used for acquiring abnormal large current, and when the acquired current value exceeds a threshold value, the motor is controlled to be shut down in a protective and safe manner.
7. The special high-torque variable-power reluctance motor for the oil pumping unit in the oil field according to claim 1, wherein the control device is further used for obtaining the flow rate of the pumping liquid through a pumping liquid flow rate sensor, and controlling the oil pumping unit to stop when the sprint is reduced to a preset minimum value; and when the machine is stopped for a preset time, controlling the oil pumping unit to work.
8. The high-torque variable-power reluctance motor special for the oil pumping unit in the oil field according to claim 2, wherein the detection driving device further comprises a stator magnetic blocking ring and a rotor magnetic blocking ring, and the stator magnetic blocking ring is arranged between the stator iron core and the motor shell; the rotor magnetic blocking ring is arranged between the rotor iron core and the motor shell.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210081023.4A CN114123670A (en) | 2022-01-24 | 2022-01-24 | Special large-torque variable-power reluctance motor for oil pumping unit in oil field |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210081023.4A CN114123670A (en) | 2022-01-24 | 2022-01-24 | Special large-torque variable-power reluctance motor for oil pumping unit in oil field |
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| CN114123670A true CN114123670A (en) | 2022-03-01 |
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| CN202210081023.4A Pending CN114123670A (en) | 2022-01-24 | 2022-01-24 | Special large-torque variable-power reluctance motor for oil pumping unit in oil field |
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Citations (7)
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| CN1330206A (en) * | 2001-05-28 | 2002-01-09 | 彭利 | Hydraulically speed variable rotor and hydraulic type pumping unit for petroleum exploitation |
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2022
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| CN1330206A (en) * | 2001-05-28 | 2002-01-09 | 彭利 | Hydraulically speed variable rotor and hydraulic type pumping unit for petroleum exploitation |
| CN2765349Y (en) * | 2004-11-04 | 2006-03-15 | 陈剑波 | Intelligent electric control cabinet for oil extractor with computer settable parameters |
| CN202737797U (en) * | 2012-08-20 | 2013-02-13 | 郭源生 | Speed governing system of switched reluctance motor special for screw pump |
| CN203119818U (en) * | 2012-11-16 | 2013-08-07 | 淄博京科电气研究所 | Oil-pumping-unit dedicated switch reluctance motor speed regulation system |
| CN106026425A (en) * | 2016-01-07 | 2016-10-12 | 安泰科技股份有限公司 | Switched reluctance motor with nanocrystalline alloy iron core and preparation method thereof |
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| CN107565858A (en) * | 2017-09-15 | 2018-01-09 | 王慧玲 | A kind of oil pumping in oil fields switched Reluctance Motor Control System |
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