CN200990552Y - Deformed rotor superlow speed large torque short magnetic path speed control motor - Google Patents

Deformed rotor superlow speed large torque short magnetic path speed control motor Download PDF

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Publication number
CN200990552Y
CN200990552Y CN 200520132405 CN200520132405U CN200990552Y CN 200990552 Y CN200990552 Y CN 200990552Y CN 200520132405 CN200520132405 CN 200520132405 CN 200520132405 U CN200520132405 U CN 200520132405U CN 200990552 Y CN200990552 Y CN 200990552Y
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rotor
stator
special
shaped
speed
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Expired - Fee Related
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CN 200520132405
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王钢
马强
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王钢
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Abstract

The utility model discloses a heteromorphic rotor super low speed large torque short magnetic line timing motor, which belongs to a new field of the electromagnetism application and consists of a heteromorphic stator and a heteromorphic rotor, a big and small gear short magnetic line system, a sensor and a controller. The utility model adopts the short magnetic line with heteromorphic fixed and rotor with equal circular pitch instead of the non heteromorphic stator or rotor with equal circular pitch, which timely controls the conductive time or the current to produce reluctance torque, and thus drives the motor to run in a set rotate speed, torque, rotate direction, brake or motor driving or electricity generating state. The motor has the advantages of simple structure and easy control, and can extremely save electricity and consumption, thereby being applied to the technical fields of pump mechanism oil extraction in oil field pipe way, water wheel motor and super low speed and large torque.

Description

Ultra slow speed, large torsional moment, short magnetic circuit, speed regulation electric motor of heterotype rotor
Technical field:
The utility model is a kind of ultra slow speed, large torsional moment, short magnetic circuit, speed regulation electric motor of heterotype rotor, it is major technological breakthrough to oilfield tubular pump mechanical oil recovery actuator, be the patentee's's " the low-speed big special-shape motor drags high-efficiency low-consumption intelligent pumping unit " (ZL 02 2 57259.7) core component, belong to the electromagnetic application frontier.
Background technology:
After 18th century, the forties electromagnetic theory was applied to the motor practice, since nearly 200 years, the development of electric drive is constantly weeded out the old and bring forth the new, and all kinds of motors such as AC synchronous, alternating current asynchronous, direct current shunt excitation, series excitation, compound excitation are a splendid legacy, and single-phase, two-phase, three-phase are multifarious.The application of motor has greatly improved productivity ratio and product quality, greatly facilitate automatic control and remote control, greatly alleviated heavy manual labor, motor miscellaneous has become the source of the power that industrial or agricultural, science and technology, national defence and people's daily life depend on for existence and development.Simple in structure, power conversion is convenient, and economical operation reliably is the flourishing long time basic reason of motor.The middle and later periods 1980s, develop successfully again that a kind of starting torque is big, starting current is little, be applicable to the switched reluctance machines of frequent forward and backward, obtained good electricity-saving consumption reduction effect aspect dragging in weaving, printing and dyeing, blower fan, water pump, electric locomotive and oil-field oil pumper speed governing.In recent years, the roll-turning motor that can realize low-speed big has also caused showing great attention to of electromechanics trade.But in many cases, as oilfield tubular pump mechanical oil production system, commutation trouble, speed governing difficulty, energy consumption height, common electric machine and the switched reluctance machines that is applicable to high-speed cruising usually be not by other mechanical driving device, be difficult to adapt to the service requirement of this kind operating mode, demand developing a kind of brand-new motor type urgently.For many years, further investigation has been done to the low-speed big motor in the forward position of the patentee's tracking motor technical development, develops solution such as the slow-speed of revolution, high pulling torque, the frequent electric drive that commutates, saves energy and reduce the cost.The utility model is exactly innovation improvement on the basis of the patentee ZL 00 2 46414.4, ZL 00 2 59694.6, ZL 02 2 57259.7 patented technologies, makes it the type of new generation that more becomes perfect.
Summary of the invention:
The purpose of this utility model is that a kind of speed governing of exploration is simple, convenience, high pulling torque, slow-revving electromagnetic method commutate, design a kind of brand-new motor dexterously, to replace heavy expensive reducing gear and complicated exchange system, for develop a kind of efficient low-consume driven equipment of electromechanical integration such as mining sites such as tubing pump mechanical oil recoverys, start the electromagnetic application frontier, realize that the revolutionary character of industry energy-saving consumption reductions such as oilfield tubular pump mechanical oil recovery breaks through.
For achieving the above object, the utility model has been broken through the Design Mode of conventional motors, employing phase utmost point independent magnetic circuit, the buncher that does not wait tooth pitch, special-shaped rotor, big or small tooth short magnetic circuit structural to design, the common electric machine slow-speed of revolution, the difficult difficult problem that realizes of high pulling torque have been overcome, be aided with that the power electronics control circuit can be realized rotating speed, turns to, the control of torque, four quadrant running has been realized breaking through such as the revolutionary character of field actuators such as oilfield tubular pump mechanical oil recovery.
Technical solution of the present utility model is:
1. complete machine structure
Complete machine is by being fixed on the special-shaped stator (6) on the sledge formula base, special-shaped rotor (7) and angle fluted disc (16) by bearing (1), main shaft (2), key (3), bearing (4) and transducer control, protection components such as (17) are formed; Special-shaped stator (6) is made up of bearing (1), terminal box (18), stop pin (15), fin (14), stator core (9), excitation winding (21) respectively; Special-shaped rotor (7) is made up of outstanding grooving or sling groove (10), brake disc (11), insurance grooving and safety rope hole (12), sealing ring (13), rotor core (8) respectively; Special-shaped stator (6), special-shaped rotor (7) are the biconvex utmost point, big or small tooth (19) short magnetic circuit structural; The complete machine lubricant housings is sealed by bearing (ball) cover (5).
2. rotor cylinder design
The face shaping of special-shaped rotor (7) is that symmetrical wheel shaft type both-end drives inside and outside rotor bending moment cylinder, the special-shaped external rotor cylinder of tubular, the inside and outside rotor bending moment of single-ended drive cylinder; Special-shaped rotor (7) be configured to the hollow spoke structure, axis hole is opened at its radial symmetric center, reinforcement is established at the power position of enjoying, its axial symmetrical centre is established outstanding grooving or sling groove (10), the groove outer surface is casting exasperate or sulfuration abrasive rubber; Outstanding grooving or sling groove (10) both sides are brake disc (11), brake disc (11) outside is insurance grooving and safety rope hole (12), block with brake disc (11) and sealing ring (13) insurance grooving and safety rope hole (12), and sealing ring (13) outer end is symmetrical arranged rotor core (8); The supporting way of special-shaped rotor (7) is that stator and bearing Contiuum type, stator and bearing are split type, bearing and main shaft independent support formula; Bearing (4) is assemblied in the rotor shaft hatch, also can be assemblied in the stator axis hole.
3. stator design
Special-shaped stator (6) corresponds to different outer, interior spoke structure with special-shaped rotor (7), and two axial ends is symmetrical arranged, and reinforcement is established in each force part; Special-shaped stator (6) outer end upper and lower sides is established stop pin (15), terminal box (18) respectively, and the inner end upper and lower sides is less than the exterior arc surface external upset (EU)s of 180 degree, and the auger shell hole is respectively with the fixing two ends stator casing and fastening with base of curved cover plate; Corresponding inside and outside wheel rim fixed stator iron core (9), stator core (9) between cog is equipped with central excitation winding (21); Special-shaped stator (6) axis hole splines.
4. magnetic Circuit Design
Stator and rotor are for waiting tooth pitches such as tooth pitch or rotor, and stator does not wait the tooth pitch short magnetic circuit structural, and the phase of promptly switching on stator and rotor tooth pitch equates, the magnetic circuit closure is utilized the facewidth not wait and guaranteed certain overlap coefficient, but not the stator and rotor tooth pitch of energising phase does not wait; Offer three teeth or how little tooth on the stator canine tooth; The tooth pitch tooth utmost points (20) such as each rotor of rotor core (8) are fixed on the rotor body by bracket, location notch, end face step, outer back-up ring; The big or small tooth (19) of stator core (9) is axially fixed in the inside and outside wheel rim of stator by bracket, location notch, end face step and back-up ring; The central excitation winding (21) that constitutes by certain phase sequence is housed between stator tooth, and excitation winding (21) lead-out wire is fixed by terminal block, and is external to the control circuit of control cubicle by terminal box (18).
5. Control System Design
Bury thermal sensor element underground in special-shaped stator (6) slot for winding; special-shaped rotor (7) the one side settings angle fluted disc (16) identical with rotor tooth form; the stator position installing infrared electro tube sensor (17) corresponding with it; the Work condition analogue device is gathered load signal; above-mentioned signal feeds back to control circuit by cable, realize rotating speed, turn to, protection, indicator card manually, automatically, remote-controlled intelligent control.
6. stator and rotor heat dissipation design
Special-shaped stator (6) is outer, inner rim is provided with fin (14), and fin is established at spoke perforate position, and main shaft (2) is the hollow shaft of axial middle part sealing, and the axle two ends open one to several inlet and outlet holes, external unpowered or dynamic ventilating fan forced heat radiation.
7. internal body magnetic circuit Drive Structure design
Special-shaped stator (6), special-shaped rotor (7) internal body iron core and magnetic circuit Drive Structure are that the short Magnetic circuit switch magneto resistance speed-regulating of the inside and outside rotor of ultra-low speed big torsional moment drives, inside and outside rotor permanent magnet synchronous variable-speed drives, inside and outside rotor AC asynchronous speed-regulating drives, inside and outside rotor DC speed regulation drives, and its winding configuration is single-phase winding, two phase windings, three phase windings, four phase windings etc.
8. technical parameter design
The important technological parameters of ultra slow speed, large torsional moment, short magnetic circuit, speed regulation electric motor of heterotype rotor is determined according to following empirical equation:
Da = W M 1 Pem B δ Anλ 3
Nr=W M2?f?/n
L?cm(Ns,Nr)=q?Nr(>Ns>Nr)
In the formula: Da-motor rotor core external diameter; Pem-motor electromagnetic power; B δIt is close that-motor calculates magnetic; The A-motor calculates specific electric load; The n-motor speed; λ-silicon steel sheet diameter and folded thick ratio; The Nr-rotor number of teeth; The Ns-stator number of teeth; The q-number of motor phases; The f-frequency of supply; L cm-least common multiple; W M1-experience correction factor; W M2-tooth pole optimization coefficient.
Technical parameter after the optimization is: Mn>15KNm; N=0-50r/s; Da 〉=800mm; " the W of stator and rotor tooth pole optimization MGolden Combination " be four phase windings 3 * 16/90 or 3 * 32/180, three phase windings 3 * 18/120.
Operation principle of the present utility model as shown in Figure 2, adopt energising phase stator and rotor tooth pitch to equate, be tooth pitch place magnetic circuit closures such as stator and rotor (adopt and not wait the facewidth to guarantee certain overlap coefficient), but not the stator and rotor tooth pitch of energising phase do not wait, thereby realize the random start operation.Control in good time conducting phase time (electrical degree) produces reluctance torque and makes motor or electronic or generating state operation.Change the energising phase sequence, can change motor steering, the size of control electrical current and power on/off can change torque, rotating speed constantly, can also realize running under braking.For instantaneous position and the rotating speed that detects motor, high-performance infrared photocell member sensor device is housed in the motor shaft end.This sensor acquisition angular displacement signal and tach signal feed back to control circuit with it.Control circuit is made up of a single-chip microcomputer and numeral, analog circuit, its effect is to regulate output signal continuously according to peripheral operation control requirement and motor practical operation situation, to change the energising of motor by drive circuit and power circuit, make it to reach the service requirement of regulation, as turn to, torque, rotating speed, electronic and braking etc., and be in optimum Working.In addition, control circuit also can be realized kinds of protect and self-diagnostic function.Because the alterability of Single Chip Microcomputer (SCM) program can also satisfy the various requirement aspect motor performance more conveniently.The operation display circuit in order to receive manually, remote control or electric operation signal, as start, stop, turning to, tach signal etc., and operational circumstances, motor practical operation situation and failure condition shown with charactron and luminous tube, realize the highly electromechanical integration of intelligence.
The utility model ultra slow speed, large torsional moment, short magnetic circuit, speed regulation electric motor of heterotype rotor and common motor and ordinary tap reluctance motor relatively have tangible technical advantage aspect following eight.
1. ultralow rotating speed, high pulling torque can replace heavy expensive reducing gear;
2. detent torque is big, starting current is little, has the starting characteristic that conventional motor hardly matches;
3. be suitable for frequent forward and backward, can replace complicated changement;
Rotating speed, turn to, electromechanical integration height such as braking is controlled, can realize highly intelligent;
5. interpolar adopts short magnetic circuit structural, can significantly reduce the magnetic resistance loss;
6. stator core stamping sheet is that big or small tooth or interpolar are discontinuous, can save material, reduces copper loss;
7. rotor does not have winding or sliver, can save the iron core nonferrous materials, reduces rotor I 2The R loss;
8. simple in structure, easy to maintenance, control flexibly, energy-saving and cost-reducing, economical operation is reliable.
This machine is to have summed up motor operating experience over more than 200 year in modern age, the type of new generation of innovative design.
Description of drawings:
Fig. 1 is that special-shaped internal rotor Contiuum type supports the short magnetic circuit buncher of ultra-low speed big torsional moment structural representation, wherein: 1. bearing; 2. main shaft; 3. key; 4. bearing; 5. bearing (ball) cover; 6. special-shaped stator (outward); 7. special-shaped rotor (interior); 8. rotor core; 9. stator core; 10. outstanding grooving or sling groove; 11. brake disc; 12. insurance grooving and safety rope hole; 13. sealing ring; 14. fin; 15. stop pin; 16. angle fluted disc; 17. transducer; 18. terminal box.
Fig. 2 is the short magnetic circuit buncher size of a special-shaped internal rotor ultra-low speed big torsional moment tooth short magnetic circuit structural schematic diagram, wherein: the not equidistant tooth utmost point (big or small tooth) of 19. stators; 20. the tooth pitch tooth utmost points such as rotor; 21. excitation winding; 22. energising phase closed magnetic circuit.
Fig. 3 is the short magnetic circuit buncher of the split type support ultra-low speed big torsional moment of a special-shaped external rotor structural representation, wherein: 1. bearing; 2. main shaft; 3. key; 4. bearing; 5. bearing (ball) cover; 6. special-shaped stator (interior); 7. special-shaped rotor (outward); 8. rotor core; 9. stator core; 10. outstanding grooving or sling groove; 11. brake disc; 12. insurance grooving and safety rope hole; 13. sealing ring; 14. fin; 15. stop pin; 16. angle fluted disc; 17. transducer; 18. terminal box.
Fig. 4 is the short magnetic circuit buncher of a special-shaped external rotor ultra-low speed big torsional moment short magnetic circuit structural schematic diagram, wherein: the not equidistant tooth utmost point of 19. stators; 20. the tooth pitch tooth utmost points such as rotor; 21. excitation winding; 22. energising phase closed magnetic circuit.
Fig. 5 is that special-shaped external rotor stand alone type supports the short magnetic circuit buncher of ultra-low speed big torsional moment structural representation, wherein: 1. bearing; 2. main shaft; 3. key; 4. bearing; 5. bearing (ball) cover; 6. special-shaped stator (interior); 7. special-shaped rotor (outward); 8. rotor core; 9. stator core; 10. outstanding grooving or sling groove; 11. brake disc; 12. insurance grooving and safety rope hole; 13. sealing ring; 14. fin; 15. stop pin; 16. angle fluted disc; 17. transducer; 18. terminal box.
Fig. 6 is the special-shaped external rotor ultra-low speed big torsional moment of a tubular permanent magnetism velocity modulation electric engine structure schematic diagram, wherein: 1. bearing; 2. main shaft; 3. key; 4. bearing; 5. bearing (ball) cover; 6. special-shaped stator (interior); 7. special-shaped rotor (outward); 8. rotor core (magnet steel); 9. stator core (winding); 10. outstanding grooving or sling groove; 11. brake disc (hub); 23. outer end cap.
Fig. 7 is the short magnetic circuit buncher of the split type support single-ended drive of a special-shaped external rotor ultra-low speed big torsional moment structural representation, wherein: 1. bearing; 2. main shaft; 3. key; 4. bearing; 5. bearing (ball) cover; 6. special-shaped stator (interior); 7. special-shaped rotor (outward); 8. rotor core; 9. stator core (winding); 10. outstanding grooving or sling groove; 11. brake disc (hub); 23. outer end cap.
Embodiment:
1. the utility model ultra slow speed, large torsional moment, short magnetic circuit, speed regulation electric motor of heterotype rotor is the actuator that designs for " the low-speed big special-shape motor drags high-efficiency low-consumption intelligent pumping unit ".Structure is the short Magnetic circuit switch magneto resistance speed-regulating of a special-shaped internal rotor ultra-low speed big torsional moment motor, special-shaped internal rotor, the cast molding of cast steel of special-shaped external stator, external stator maximum outside diameter ∮ 1600, internal rotor maximum outside diameter ∮ 1380, the main shaft hollow shaft, external stator core adopts a canine tooth three little toothings, and the stator and rotor tooth utmost point adopts " W MGolden Combination ", i.e. four phase windings 3 * 16/90 or 3 * 32/180, three phase windings 3 * 18/120.0-20 rev/min of model machine rated speed, nominal torque are greater than 20kNm, and peak power output 37kW is suitable for dragging 12 type oil pumpers.
2. the utility model ultra slow speed, large torsional moment, short magnetic circuit, speed regulation electric motor of heterotype rotor also is the actuator that designs for oilfield tubular pump mechanical oil recovery.Its model machine is the ultra-low speed big torsional moment permanent magnetism velocity modulation electric engine of special-shaped outer-rotor structure, special-shaped external rotor, the cast molding of cast steel of special-shaped internal stator housing, its outer rotor case and tooth interpolar shield with non-magnetic stainless steel, external rotor maximum gauge ∮ 1412, internal stator maximum outside diameter ∮ 1210, the main shaft hollow shaft.0-50 rev/min of model machine rated speed, nominal torque are greater than 16kNm, and peak power output 22kW is suitable for dragging 10 type oil pumpers.

Claims (8)

1. ultra slow speed, large torsional moment, short magnetic circuit, speed regulation electric motor of heterotype rotor is characterized in that: complete machine is by being fixed on the special-shaped stator (6) on the sledge formula base, special-shaped rotor (7) and angle fluted disc (16) by bearing (1), main shaft (2), key (3), bearing (4) and transducer control, protection components such as (17) are formed; Special-shaped stator (6) is made up of bearing (1), terminal box (18), stop pin (15), fin (14), stator core (9), excitation winding (21) respectively; Special-shaped rotor (7) is made up of outstanding grooving or sling groove (10), brake disc (11), insurance grooving and safety rope hole (12), sealing ring (13), rotor core (8) respectively; Special-shaped stator (6), special-shaped rotor (7) are the biconvex utmost point, big or small tooth (19) short magnetic circuit structural; The complete machine lubricant housings is sealed by bearing (ball) cover (5).
2. ultra slow speed, large torsional moment, short magnetic circuit, speed regulation electric motor of heterotype rotor according to claim 1, it is characterized in that: the face shaping of special-shaped rotor (7) is that symmetrical wheel shaft type both-end drives inside and outside rotor bending moment cylinder, the special-shaped external rotor cylinder of tubular, the inside and outside rotor bending moment of single-ended drive cylinder; Special-shaped rotor (7) be configured to the hollow spoke structure, axis hole is opened at its radial symmetric center, reinforcement is established in each force part, its axial symmetrical centre is established outstanding grooving or sling groove (10), the groove outer surface is casting exasperate or sulfuration abrasive rubber; Outstanding grooving or sling groove (10) both sides are brake disc (11), brake disc (11) outside is insurance grooving and safety rope hole (12), block with brake disc (11) and sealing ring (13) insurance grooving and safety rope hole (12), and sealing ring (13) outer end is symmetrical arranged rotor core (8); The supporting way of special-shaped rotor (7) is that stator and bearing Contiuum type, stator and bearing are split type, bearing and main shaft independent support formula; Bearing (4) is assemblied in the rotor shaft hatch, also can be assemblied in the stator axis hole.
3. ultra slow speed, large torsional moment, short magnetic circuit, speed regulation electric motor of heterotype rotor according to claim 1 is characterized in that: special-shaped stator (6) corresponds to different outer, interior spoke structure with special-shaped rotor (7), and two axial ends is symmetrical arranged, and reinforcement is established in each force part; Special-shaped stator (6) outer end upper and lower sides is established stop pin (15), terminal box (18) respectively, and the inner end upper and lower sides is less than the exterior arc surface external upset (EU)s of 180 degree, and the auger shell hole is respectively with the fixing two ends stator casing and fastening with base of curved cover plate; Corresponding inside and outside wheel rim fixed stator iron core (9), stator core (9) between cog is equipped with central excitation winding (21); Special-shaped stator (6) axis hole splines.
4. ultra slow speed, large torsional moment, short magnetic circuit, speed regulation electric motor of heterotype rotor according to claim 1, it is characterized in that: stator and rotor are to wait tooth pitches such as tooth pitch or rotor, stator does not wait the tooth pitch short magnetic circuit structural, the phase of promptly switching on stator and rotor tooth pitch equates, the magnetic circuit closure, utilize the facewidth not wait and guarantee certain overlap coefficient, but not the stator and rotor tooth pitch of energising phase does not wait; Offer three teeth or how little tooth on the stator canine tooth; The tooth pitch tooth utmost points (20) such as each rotor of rotor core (8) are fixed on the rotor body by bracket, location notch, end face step, outer back-up ring; The big or small tooth (19) of stator core (9) is axially fixed in the inside and outside wheel rim of stator by bracket, location notch, end face step and back-up ring; The central excitation winding (21) that constitutes by certain phase sequence is housed between stator tooth, and excitation winding (21) lead-out wire is fixed by terminal block, and is external to the control circuit of control cubicle by terminal box (18).
5. ultra slow speed, large torsional moment, short magnetic circuit, speed regulation electric motor of heterotype rotor according to claim 1; it is characterized in that: bury thermal sensor element underground in special-shaped stator (6) slot for winding; special-shaped rotor (7) the one side settings angle fluted disc (16) identical with rotor tooth form; the stator position installing infrared electro tube sensor (17) corresponding with it; the Work condition analogue device is gathered load signal; above-mentioned signal feeds back to control circuit by cable, realize rotating speed, turn to, protection, indicator card manually, automatically, remote-controlled intelligent control.
6. ultra slow speed, large torsional moment, short magnetic circuit, speed regulation electric motor of heterotype rotor according to claim 1, it is characterized in that: special-shaped stator (6) is outer, inner rim is provided with fin (14), fin is established at spoke perforate position, main shaft (2) is the hollow shaft of axial middle part sealing, the axle two ends open one to several inlet and outlet holes, external unpowered or dynamic ventilating fan forced heat radiation.
7. ultra slow speed, large torsional moment, short magnetic circuit, speed regulation electric motor of heterotype rotor according to claim 1, it is characterized in that: special-shaped stator (6), special-shaped rotor (7) internal body iron core and magnetic circuit Drive Structure are that the short Magnetic circuit switch magneto resistance speed-regulating of the inside and outside rotor of ultra-low speed big torsional moment drives, inside and outside rotor permanent magnet synchronous variable-speed drives, inside and outside rotor AC asynchronous speed-regulating drives, inside and outside rotor DC speed regulation drives, and its winding configuration is single-phase winding, two phase windings, three phase windings, four phase windings etc.
8. ultra slow speed, large torsional moment, short magnetic circuit, speed regulation electric motor of heterotype rotor according to claim 1 is characterized in that: important technological parameters Mn>15kNm, n=0-50r/s, Da 〉=800mm, the stator and rotor tooth utmost point " W MGolden Combination " be four phase windings 3 * 16/90 or 3 * 32/180, three phase windings 3 * 18/120.
CN 200520132405 2005-11-07 2005-11-07 Deformed rotor superlow speed large torque short magnetic path speed control motor Expired - Fee Related CN200990552Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 200520132405 CN200990552Y (en) 2005-11-07 2005-11-07 Deformed rotor superlow speed large torque short magnetic path speed control motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 200520132405 CN200990552Y (en) 2005-11-07 2005-11-07 Deformed rotor superlow speed large torque short magnetic path speed control motor

Publications (1)

Publication Number Publication Date
CN200990552Y true CN200990552Y (en) 2007-12-12

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ID=38941586

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 200520132405 Expired - Fee Related CN200990552Y (en) 2005-11-07 2005-11-07 Deformed rotor superlow speed large torque short magnetic path speed control motor

Country Status (1)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103812295A (en) * 2012-11-09 2014-05-21 王刚 Low speed large torque heterotype motor
CN103867163A (en) * 2012-12-10 2014-06-18 王颖 Pressure balance motor reversing oil pumping unit

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103812295A (en) * 2012-11-09 2014-05-21 王刚 Low speed large torque heterotype motor
CN103812295B (en) * 2012-11-09 2017-03-15 王刚 Low-speed big special-shape motor
CN103867163A (en) * 2012-12-10 2014-06-18 王颖 Pressure balance motor reversing oil pumping unit
CN103867163B (en) * 2012-12-10 2016-09-28 王颖 Pressure balance electrical machinery commutation intelligence pumping unit

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