CN112436636A - Permanent magnet motor and oil pumping device using same - Google Patents
Permanent magnet motor and oil pumping device using same Download PDFInfo
- Publication number
- CN112436636A CN112436636A CN202011351014.XA CN202011351014A CN112436636A CN 112436636 A CN112436636 A CN 112436636A CN 202011351014 A CN202011351014 A CN 202011351014A CN 112436636 A CN112436636 A CN 112436636A
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- China
- Prior art keywords
- permanent magnet
- brake
- silicon steel
- spoke
- steel sheet
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2786—Outer rotors
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/223—Rotor cores with windings and permanent magnets
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/26—Rotor cores with slots for windings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
- H02K1/30—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures using intermediate parts, e.g. spiders
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
- H02K21/22—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating around the armatures, e.g. flywheel magnetos
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/46—Motors having additional short-circuited winding for starting as an asynchronous motor
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
The invention discloses a permanent magnet motor which is characterized by comprising a stator assembly, a rotor assembly and a brake assembly. The rotor assembly comprises a spoke, a plurality of magnets, a silicon steel sheet, a hub, an end ring and a guide bar. The spoke is fixed at the lateral wall of ring channel, and the silicon steel sheet is installed in the spoke. The silicon steel sheet is provided with a plurality of first grooves and second grooves, the guide bars are installed in the first grooves, and the magnets are installed in the second grooves. A hub is fixed to one end of the spoke, which is mounted to the inner side of the support column via a rotating shaft. The end rings are positioned on two sides of the silicon steel sheet, the spoke is provided with an inclined hole, and a positioning column extends into the end rings from the inclined hole and at least partially extrudes the end rings into the silicon steel sheet. The permanent magnet motor adopts an outer rotor permanent magnet synchronous motor structure, is provided with a plurality of pairs of magnets, and can realize low-speed high-torque rotation. The positioning column extrudes the silicon steel sheet while fixing the end ring, and the silicon steel sheet is kept in a compression state.
Description
Technical Field
The invention belongs to the application technology of a permanent magnet motor, and particularly relates to a permanent magnet motor and an oil pumping unit using the same.
Background
It is known in the art that a multi-slot multi-pole structure may be used to manufacture permanent magnet motors, such as CN110061592A, etc. And this kind of permanent magnet motor can be used for beam-pumping unit, its structure is more compact than the high-speed motor, refer to the outer rotor motor direct traction formula beam-pumping unit of CN101696624A, but this patent does not disclose its permanent magnet motor's specific structure. According to the prior art, the working environment of the oil pumping device is severe, and the structure of the outer rotor enables the rotor to be easily affected by the outside. The existing permanent magnet motor is difficult to meet the requirements, and a permanent magnet motor with a more reliable structure is needed to be provided and is specially used for an oil pumping device.
Disclosure of Invention
The invention provides a permanent magnet motor which is stable in structure, suitable for severe working environments and capable of keeping low speed and high torque.
The technical scheme of the invention is realized as follows:
a permanent magnet electric machine, comprising:
the stator assembly comprises a shell, a stator core and a stator winding, wherein the shell is provided with a coaxial annular groove and a supporting column, the stator core is sleeved on the supporting column, and the stator winding is arranged on the stator core;
the rotor assembly comprises a spoke, a plurality of magnets, a silicon steel sheet, a hub, an end ring and guide bars, wherein the spoke is fixed on the side wall of the annular groove, the silicon steel sheet is installed in the spoke, the silicon steel sheet is provided with a plurality of first grooves and second grooves, the guide bars are installed in the first grooves, the magnets are installed in the second grooves, the hub is fixed at one end of the spoke, the hub is installed to the inner side surface of the supporting column through a rotating shaft, the end ring is located on two sides of the silicon steel sheet, the spoke is provided with an inclined hole, and a positioning column extends into the end ring from the inclined hole and at least partially extrudes the end ring into the silicon steel;
the brake assembly comprises a base, a brake pull rod, a brake arm, brake shoes and a pre-tightening spring, wherein the base is installed on a shell, the brake pull rod is installed on two sides of the base, the brake arm is sleeved on the brake pull rod, the upper end of the brake arm is connected to an output shaft of a magnetic device, the lower end of the brake arm is hinged to the shell, the brake shoes are installed in the middle of the brake arm, the pre-tightening spring is installed on the brake pull rod, and the end portion of the pre-tightening spring is connected to the brake.
In the invention, the end ring is provided with an abdicating groove, and the positioning column at least partially extends into the abdicating groove.
In the invention, a traction sheave is arranged outside the spoke, and the base is provided with a pressure rod which is positioned above the traction sheave.
In the invention, the brake arm is provided with a screw which is pressed against the outer side surface of the brake shoe.
In the present invention, the base has a stroke sensor for measuring the displacement of the brake arm.
The pumping unit is characterized by comprising a support stand column, wherein a transmission assembly is arranged on the support stand column, and the transmission assembly comprises a permanent magnet motor.
The permanent magnet motor adopts an outer rotor permanent magnet synchronous motor structure, is provided with a plurality of pairs of magnets, and can realize low-speed high-torque rotation. The positioning column extrudes the silicon steel sheet while fixing the end ring, so that the silicon steel sheet is kept in a compact state, the reliability is high, the structure is stable, and the positioning device is suitable for severe working environments.
Drawings
FIG. 1 is a schematic view of a permanent magnet electric machine of the present invention;
FIG. 2 is a cross-sectional view of FIG. 1;
FIG. 3 is a schematic view of the rotor assembly of FIG. 1;
FIG. 4 is a schematic cross-sectional view of FIG. 3;
FIG. 5 is a partial view of FIG. 4;
FIG. 6 is a schematic view of FIG. 5 in another orientation;
fig. 7 is a schematic structural diagram of the pumping unit of the present invention;
FIG. 8 is a top view of FIG. 1, showing primarily the structure of the permanent magnet motor and the guide wheel;
FIG. 9 is an enlarged view of portion A of FIG. 7;
fig. 10 is a schematic structural diagram of the permanent magnet motor of the pumping unit of the present invention disposed at the bottom of the support column;
FIG. 11 is a schematic structural view of the lifting bracket of FIG. 7, mainly illustrating the internal structure of the walking beam;
FIG. 12 is a bottom view of FIG. 11;
FIG. 13 is an enlarged view of the portion B of FIG. 12;
fig. 14 shows an automated control system for such a pumping unit of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.
The permanent magnet electric machine 11 of the present invention, as shown in fig. 1 to 6, includes a stator assembly 70, a rotor assembly 80, and a brake assembly 60. Stator assembly 70 includes a housing 71, a stator core 72, and a stator winding 73. The housing 71 has an annular groove 74 and a support post 75 which are coaxial. The annular groove 74 has a large-diameter wall 76 and a small-diameter wall surface 77, and the small-diameter wall surface 77 is the outer side surface of the support column 75. The stator core 72 is fitted over the support column 75, and the stator winding 73 is mounted on the stator core 72. Alternating magnetic fields are formed by passing alternating currents through the stator windings 73. The rotor assembly 80 includes a spoke 81, a plurality of magnets 82, a silicon steel sheet 83, a hub 84, an end ring 85, and a guide bar 86. The spokes 81 are fixed to the large-diameter wall surface 76 of the annular groove 74, and a traction sheave 87 is provided outside the spokes 81. The traction sheave 87 is used for connecting a wire rope. The base 61 is provided with a pressing bar 69, the pressing bar 69 is positioned above the traction sheave 87, and the pressing bar 69 is used for maintaining the position of the steel wire rope. Silicon steel sheets 83 are mounted in the spokes 81. The silicon steel sheet 83 has a plurality of first grooves 88 and second grooves 89, the guide bars 86 are installed in the first grooves 88, and the magnets 82 are installed in the second grooves 89. The number of the magnets 82 is not limited in the present invention, and preferably, a plurality of pairs of magnets 82 may be used to realize low-speed high-torque rotation. A hub 84 is fixed to one end of the spoke 81, the hub 84 being mounted to the inner side of the support post 75 via a shaft 91. The conducting bars 86 are connected with end rings 85 to form a squirrel cage structure. The rotor assembly 80 rotates in an alternating magnetic field and the hub 84 drives the cable through the traction sheave. In the present invention, the end rings 85 are located on both sides of the silicon steel sheet 83, the spoke 81 has an inclined hole 92, and the positioning column 93 extends into the end ring 85 from the inclined hole 92 and at least partially extrudes the end ring 85 into the silicon steel sheet 83 to form an extruding part 95. The positioning columns 93 press the silicon steel sheets 83 while fixing the end ring 85, so that the silicon steel sheets 83 are kept in a pressing state, the reliability is high, and the method is suitable for severe working environments. In addition, the end ring 85 has a recess 94, and the positioning pillar 93 at least partially extends into the recess 94, so that the position of the positioning pillar 93 can be maintained, the positioning pillar 93 is prevented from falling off, and the structural stability is good.
The pumping unit of the present invention as shown in fig. 7 to 14 comprises a support column 10, wherein a transmission assembly is disposed on the support column 10, and the transmission assembly comprises a permanent magnet motor 11, a first guide wheel 12 and a second guide wheel 121. The guide wheel plays the effect of supplementary tensioning and guide, avoids wire rope adhesion, lap winding phenomenon to appear, guarantees the stability of wire rope work.
A first wire rope 13 and a second wire rope 14 are wound around the permanent magnet motor 11. First wire rope 13 is connected with first leading wheel 12, and first leading wheel 12 below is equipped with first assembly pulley, and first assembly pulley includes first movable pulley 15 and first fixed pulley 16, and first wire rope 13 passes first movable pulley 15 and first fixed pulley 16 in proper order, and balancing weight 17 installs in first movable pulley 15 below. The torque of the permanent magnet motor for pulling the counterweight block 17 is effectively reduced through the combination of the fixed pulley and the movable pulley.
The up-and-down motion of balancing weight 17 and sucker rod 22 can be driven through the positive and negative rotation of permanent-magnet machine 11, and permanent-magnet machine 11 corotation drives balancing weight 17 upward movement through first wire rope 13, through first fixed pulley 16 and first movable pulley 15, greatly reduced the demand to the motor moment of torsion, sucker rod 22 moves down under the action of gravity of horse head 21 simultaneously. When the permanent magnet motor 11 rotates reversely, the counterweight 17 descends, the second movable pulley 19 descends under the action of the counterweight 17 and the permanent magnet motor 11, the sucker rod 22 moves upwards, the gravity influence of the second movable pulley 19 and the walking beam 20 is overcome, the energy consumption is effectively reduced, and the load of the lifting oil well is improved.
The balancing weight 17 can increase the lifting load, reduce the torque demand of the motor, and simultaneously, the upper stroke time and the lower stroke time of the sucker rod can be conveniently adjusted to be consistent through the synergistic effect of the balancing weight 17 and the permanent magnet motor 11.
Be equipped with brace table 231 on the lifting support 23, walking beam 20 articulates on brace table 231, lifting support 23 sets up to two, arranges respectively in the both sides of walking beam 20, guarantees the stability of walking beam 20 work. The walking beam 20 comprises an outer beam 201 and an inner beam 202, a guide device is arranged between the outer beam 201 and the inner beam 202, the guide device comprises a second permanent magnet motor 41, a gear 42 and a rack 43, the second permanent magnet motor 41 is fixedly mounted on the outer beam 201, a transmission shaft of the second permanent magnet motor 41 penetrates through the outer wall of the outer beam 201 and is connected with the gear 42, the rack 43 is mounted on the side wall of the inner beam 202, and the gear 42 is meshed with the rack 43. Through the transmission mode of rack and pinion, the flexible of control inner beam 202 in outer beam 201, the arm of force length of adjustment lever subassembly to reach and reduce the motor moment of torsion.
The inner beam 202 is installed on the outer beam 201 through a supporting device, the supporting device comprises an upper supporting device and a lower supporting device, the upper supporting device comprises a first fixing seat 44, a second fixing seat 45 and a connecting rod 46, the first fixing seat 44 is fixed at one end of the inner beam 202, the second fixing seat 45 is installed at one end of the outer beam 201, the connecting rod 46 is fixedly connected with the first fixing seat 44, for example, welded and fixed, a through hole is formed in the second fixing seat 45, and the connecting rod 46 penetrates through the through hole and is slidably installed in the second fixing seat 45.
The lower supporting device comprises a supporting frame 47 and an expansion link 48, the supporting frame 47 is mounted at the bottom of the outer beam 201 through a reinforcing rod 49, one end of the expansion link 48 is hinged on the supporting frame 47, and the other end of the expansion link 48 is hinged at the bottom of the inner beam 202. Support the inner beam through last strutting arrangement and bottom suspension device can be fine, guarantee the flexible stability of inner beam 202 in outer beam 201, the flexible distance of inner beam 202 is far away, and lever adjustment is effectual.
A limiting plate 203 is arranged on the inner beam 202, a positioning plate 204 is arranged in the outer beam 201, a sensor 205 is arranged on the positioning plate 204, and the sensor 205 is connected with the processor. When the inner beam 202 extends outwards, the limiting plate 203 moves along with the inner beam to contact with the sensor 205, the sensor 205 receives a signal and transmits the signal to the processor, and the processor controls the second permanent magnet motor 41 to stop moving.
The sucker rod 22 is a cylindrical structure, the upper part of the sucker rod 22 is provided with a binding hoop 24, the lower part of the sucker rod 22 is provided with a one-way infiltration valve 25, crude oil backflow can be avoided, the lower end of the one-way infiltration valve 25 is connected with a connecting rod 26, the bottom end of the connecting rod 26 is connected with an oil well pump 27, the connecting rod 26 is driven by the sucker rod 22 to be lifted up and down, crude oil extraction is carried out through the oil well pump 27, the outer ring of the sucker rod 22 is provided with an oil pipe 28, the top end of the oil pipe 28 is provided with. The pumping rod 22 is controlled to move up and down by the direct driving mode of the permanent magnet motor 11, so that crude oil is pumped, and the stability is good.
Fig. 4 shows a schematic structural view of a permanent magnet motor 11 of a pumping unit disposed at the bottom of a support column 10 according to another embodiment of the present invention. Including permanent-magnet machine 11, support post 10, sucker rod 22, balancing weight 17, second loose pulley assembly and lever subassembly, permanent-magnet machine 11 is located support post 10's bottom, second loose pulley assembly includes third fixed pulley 51, third movable pulley 52, fourth fixed pulley 53 and fourth movable pulley 54, third fixed pulley 51 and fourth fixed pulley 54 are installed at support post 10's top, permanent-magnet machine 11 connects gradually fourth fixed pulley 53, third movable pulley 52 and third fixed pulley 51 through third wire rope 55, balancing weight 17 is installed third movable pulley 52's below, permanent-magnet machine 11 passes through fourth wire rope 56 and connects fourth movable pulley 54, fourth movable pulley 54 is installed the one end of walking beam 20.
The permanent magnet motor 11 is located at the bottom of the support column 10 for convenient installation and maintenance by personnel, and the working principle is consistent with that of the first embodiment. In addition, through reasonable layout, two guide wheels are omitted, and the installation cost is reduced.
Fig. 5 shows an automatic management schematic diagram of the pumping unit of the present invention, which includes a frequency converter, a permanent magnet motor and a pumping unit, wherein parameters of the flow rate of oil in the pumping unit and the rotation direction and speed of the permanent magnet motor are obtained through a flow meter and an encoder, and are transmitted to a processor together with the parameters of the permanent magnet motor, the processor adjusts the parameters of the frequency converter according to a preset program, a human intervention process is added during the adjustment of the frequency converter by the processor, and the parameters are further adjusted on the parameters given by the processor to make the pumping unit in an optimal state through the working experience of a manager and the actual operation condition of the pumping unit. And a manual intervention process is added on the basis of automatic management, so that the stable operation of the pumping unit is further ensured, and the working efficiency is improved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (6)
1. A permanent magnet electric machine, comprising:
the stator assembly comprises a shell, a stator core and a stator winding, wherein the shell is provided with a coaxial annular groove and a supporting column, the stator core is sleeved on the supporting column, and the stator winding is arranged on the stator core;
the rotor assembly comprises a spoke, a plurality of magnets, a silicon steel sheet, a hub, an end ring and guide bars, wherein the spoke is fixed on the side wall of the annular groove, the silicon steel sheet is installed in the spoke, the silicon steel sheet is provided with a plurality of first grooves and second grooves, the guide bars are installed in the first grooves, the magnets are installed in the second grooves, the hub is fixed at one end of the spoke, the hub is installed to the inner side surface of the supporting column through a rotating shaft, the end ring is located on two sides of the silicon steel sheet, the spoke is provided with an inclined hole, and a positioning column extends into the end ring from the inclined hole and at least partially extrudes the end ring into the silicon steel;
the brake assembly comprises a base, a brake pull rod, a brake arm, brake shoes and a pre-tightening spring, wherein the base is installed on a shell, the brake pull rod is installed on two sides of the base, the brake arm is sleeved on the brake pull rod, the upper end of the brake arm is connected to an output shaft of a magnetic device, the lower end of the brake arm is hinged to the shell, the brake shoes are installed in the middle of the brake arm, the pre-tightening spring is installed on the brake pull rod, and the end portion of the pre-tightening spring is connected to the brake.
2. The permanent magnet electric machine of claim 1 wherein the end ring has an offset groove and the locator post extends at least partially into the offset groove.
3. The permanent magnet motor according to claim 1, wherein a traction sheave is provided outside the spoke, and the base is provided with a pressure lever which is located above the traction sheave.
4. The permanent magnet machine of claim 1, wherein the brake arm is provided with a threaded rod that bears against the outer side of the brake shoe.
5. The permanent magnet electric machine according to claim 1, wherein the base has a travel sensor for measuring the displacement of the brake arm.
6. An oil pumping unit, characterized by comprising a support column, wherein the support column is provided with a transmission assembly, and the transmission assembly comprises the permanent magnet motor of claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011351014.XA CN112436636B (en) | 2021-01-28 | 2021-01-28 | Permanent magnet motor and oil pumping device using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011351014.XA CN112436636B (en) | 2021-01-28 | 2021-01-28 | Permanent magnet motor and oil pumping device using same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112436636A true CN112436636A (en) | 2021-03-02 |
| CN112436636B CN112436636B (en) | 2021-06-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011351014.XA Active CN112436636B (en) | 2021-01-28 | 2021-01-28 | Permanent magnet motor and oil pumping device using same |
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| Country | Link |
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| CN (1) | CN112436636B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1387300A (en) * | 2002-06-11 | 2002-12-25 | 沈阳蓝光驱动技术有限公司 | Synchronous gearless permanent-magnet draw machine |
| CN1928365A (en) * | 2006-08-15 | 2007-03-14 | 兰州理工大学 | Blade pump for hydraulic engine with pore plate centrifugal auxiliary pump |
| CN101483378A (en) * | 2009-02-24 | 2009-07-15 | 江苏大学 | Asynchronous magnetic couplings for high temperature resistant high performance oblique slot type rotor |
| CN103457430A (en) * | 2013-08-28 | 2013-12-18 | 日立电梯电机（广州）有限公司 | Outer rotor permanent magnetic synchronous magnetic resistance type traction driving device |
| CN208698351U (en) * | 2018-08-31 | 2019-04-05 | 杭州星杰汽车部件制造有限公司 | A kind of spinning riveting automobile hub unit |
| CN110460183A (en) * | 2019-08-20 | 2019-11-15 | 瑞昌市森奥达科技有限公司 | Improve the p-m rotor and its installation equipment of conducting bar and end ring |
-
2021
- 2021-01-28 CN CN202011351014.XA patent/CN112436636B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1387300A (en) * | 2002-06-11 | 2002-12-25 | 沈阳蓝光驱动技术有限公司 | Synchronous gearless permanent-magnet draw machine |
| CN1928365A (en) * | 2006-08-15 | 2007-03-14 | 兰州理工大学 | Blade pump for hydraulic engine with pore plate centrifugal auxiliary pump |
| CN101483378A (en) * | 2009-02-24 | 2009-07-15 | 江苏大学 | Asynchronous magnetic couplings for high temperature resistant high performance oblique slot type rotor |
| CN103457430A (en) * | 2013-08-28 | 2013-12-18 | 日立电梯电机（广州）有限公司 | Outer rotor permanent magnetic synchronous magnetic resistance type traction driving device |
| CN208698351U (en) * | 2018-08-31 | 2019-04-05 | 杭州星杰汽车部件制造有限公司 | A kind of spinning riveting automobile hub unit |
| CN110460183A (en) * | 2019-08-20 | 2019-11-15 | 瑞昌市森奥达科技有限公司 | Improve the p-m rotor and its installation equipment of conducting bar and end ring |
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| Publication number | Publication date |
|---|---|
| CN112436636B (en) | 2021-06-29 |
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