CN211018438U - High-voltage dual-rotor magnetic circuit structure - Google Patents
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- CN211018438U CN211018438U CN201922340280.1U CN201922340280U CN211018438U CN 211018438 U CN211018438 U CN 211018438U CN 201922340280 U CN201922340280 U CN 201922340280U CN 211018438 U CN211018438 U CN 211018438U
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Abstract
The utility model discloses a high pressure birotor magnetic circuit structure, be used for 710 supple with the power consumption 1500KW, the large-scale high-pressure frequency conversion low-speed big moment of torsion permanent magnet synchronous motor of 10KV, the rotor includes the pivot, the rotor support, separate the magnetism sleeve, the zhonghuan, magnetic pole core and magnet steel, the cover is equipped with two mutual close rungs in the pivot, the cover is equipped with one on every rotor support and separates the magnetism sleeve, install magnetic pole core on every separates the magnetism sleeve outer face of cylinder, be equipped with the magnet steel mounting groove between the adjacent magnetic pole core, magnet steel mounting groove internal fixation has the magnet steel, it separates magnetism sleeve and divide into interior magnetism layer and outer fixed layer to separate the magnetism sleeve, outer fixed layer material is the magnetostrictive material, the zho. The utility model has the advantages that: the long and thin rotor required by the high-voltage high-power low-speed large-torque double-rotor permanent magnet intelligent driving system is realized, the torque is large, the operation accuracy is high, the manufacturing cost of system project engineering is reduced, and the double-rotor permanent magnet intelligent driving system is small in size, light in weight, high in power density and high in reliability.
Description
Technical Field
The utility model belongs to the technical field of the rotor structure among the permanent-magnet machine field of technology field of making, especially, relate to a high pressure birotor magnetic circuit structure who is applied to long and thin rotor.
Background
Conventional motors typically have only one stator and one rotor, and either dc, synchronous or asynchronous machines have only one mechanical port. In recent years, a concept of a dual rotor motor having 2 mechanical shafts has been proposed, which can realize independent transfer of energy of the 2 mechanical shafts. The novel motor greatly reduces the volume and the weight of equipment, improves the working efficiency, can well meet the requirements of energy conservation and speed regulation, and has superior running performance.
The double-rotor permanent magnet motor utilizes the principle of acting force and reacting force, takes the stator of the traditional motor as an outer rotor, takes the original rotor as an inner rotor, and moves reversely. The outer rotor is provided with an armature winding, and the inner rotor is also called a permanent magnet rotor because the inner rotor is provided with a permanent magnet. The magnetic field of the permanent magnet interacts with the magnetic field generated by the armature winding to generate electromagnetic torque, and the double-rotor structure cannot meet the requirement of a slender motor.
In order to solve the problems, the chinese utility model patent CN 201821173356.5 discloses a super-long efficient permanent magnet synchronous motor of an oil-submersible direct-drive pump for downhole barrel-type operation, which comprises a housing, a stator assembly, a rotor assembly and a rotor shaft; the rotor shaft is an integral shaft; the rotor assembly comprises a plurality of unit rotors, each unit rotor comprises a rotor core and a permanent magnet arranged on the rotor core, each unit rotor is coaxially connected to the rotor shaft through the rotor core, and a bearing is arranged between every two adjacent unit rotors; stator module includes coil winding, and size and cell type assorted stator silicon steel are towards piece and stator copper towards piece, silicon steel core length equals with rotor core length, stator copper is towards piece and bearing width and equals, all fasten the inner wall at the shell, wherein the unit rotor includes rotor core and sets up the permanent magnet on rotor core, each unit rotor all with its rotor core coaxial coupling on the rotor shaft, be provided with the bearing between the two adjacent unit rotors, such structure has increased the structural component of rotor, the assembly degree of difficulty has been increased, the fault rate of rotor has been increased.
In summary, a high-voltage dual-rotor magnetic circuit structure is urgently needed to realize a long and thin rotor required by a high-voltage, high-power, low-speed and high-torque dual-rotor permanent magnet intelligent driving system, the torque is large, the operation accuracy is high, the manufacturing cost of system project engineering is reduced, and the high-voltage dual-rotor magnetic circuit structure is small in size, light in weight, high in power density and high in reliability.
Disclosure of Invention
In order to overcome the defects of the prior art, the utility model provides a high-pressure birotor magnetic circuit structure.
The utility model discloses the concrete technical scheme who adopts does:
the utility model provides a high-pressure birotor magnetic circuit structure for 710 supplyes 1500KW, the large-scale high-pressure frequency conversion low-speed big moment of torsion permanent magnet synchronous motor of 10KV, the slenderness ratio of rotor is greater than or equal to 11 and is less than or equal to 20, the rotor includes pivot, rotor support, magnetism isolation sleeve, zhonghuan, magnetic pole iron core and magnet steel, the cover is equipped with two rotor support that lean on each other in the pivot, the cover is equipped with a magnetism isolation sleeve on every rotor support, installs magnetic pole iron core on every magnetism isolation sleeve outer face of cylinder, is equipped with the magnet steel mounting groove between the adjacent magnetic pole iron core, the magnet steel mounting groove internal fixation has the magnet steel, magnetism isolation sleeve divide into interior magnetism isolation layer and outer fixed layer, and outer fixed layer material is the magnetostrictive material, the zhonghuan:
the double-rotor magnetic circuit structure is designed, the rotor bidirectional structure generates a magnetism gathering effect, the magnetic induction intensity is 20-40% stronger than that of a single magnetic steel, and a permanent magnet material can be fully utilized; the magnetic steel is embedded into the rotor, the magnetic steel is protected from being damaged by external force, the hidden danger that the magnetic steel falls off due to factors such as vibration and adhesive failure is avoided when the motor runs, the running stability is higher, the magnetic steel magnetizes the magnetic conductive material, the magnetic conductive material forms a magnetic pole and is coupled with a stator magnetic field to form electromagnetic torque, the defect that the mechanical property of the permanent magnet material is poor and the permanent magnet synchronous motor is not suitable for transmitting torque is avoided, and the permanent magnet synchronous motor is suitable for a low-rotating-speed and large-torque permanent magnet synchronous motor; birotor magnetic structure adopts the leak protection magnetism structure, whole magnetic circuit magnetic leakage is few, make the magnetic property of magnet steel obtain make full use of, compare with the product of the same type and save 5% -10% permanent magnetic material, magnet steel material also obtains corresponding saving, make the power density of motor further improve, compare in the series connection magnetic circuit of table subsides form, the rotor magnetic circuit adopts parallel structure, the rotor magnetic pole through magnetic conductive material formation, air gap magnetic field waveform sine wave form is good, can effective control torque fluctuation, prevent that the rectangular wave from producing, in addition, the characteristic of magnetostrictive material can make the rotor can be in the use appropriate increase diameter in radial direction, further reduce the air gap between rotor and the stator under the prerequisite of not sweeping the thorax, improve the magnetic flux utilization ratio, increase motor output.
The magnetic pole iron core is formed by laminating a plurality of magnetic pole stamped sheets, and the magnetic pole stamped sheet structure with small volume is convenient to manufacture by adopting amorphous materials.
The magnetic pole punching sheet is provided with a fixing through hole in the middle, the corresponding magnetic pole punching sheets on the two magnetic isolation sleeves are compressed through a magnetic pole reinforcing key, the magnetic pole punching sheets can be compressed from the center by adopting the mechanism, the stress of the magnetic pole punching sheets is uniform, and meanwhile, the fixing structure is hidden in the magnetic pole iron core, so that the size of the rotor is further reduced, and the rotor mechanism is simplified.
The magnetic pole punching sheet is in a fan ring shape, and the design has the following benefits:
1. the magnetic pole punching sheets can conveniently form a circular ring, and a rectangular mounting space is provided for the magnetic steel mounting groove;
2. the magnetic pole punching sheet can fully utilize raw materials during blanking and discharging;
3. the amorphous alloy material with small volume is convenient to use.
The magnetic pole punching piece is characterized in that dovetail protrusions are arranged on the inner circle edge of the magnetic pole punching piece, dovetail grooves are formed in the outer fixing layer of the magnetic isolation sleeve, the dovetail protrusions are fixed in the dovetail grooves, the dovetail structure is adopted, fixing firmness and installation accuracy can be guaranteed, and the dovetail protrusions are determined by the structural characteristics of the dovetail grooves.
The middle ring is a magnetic isolation partition plate made of magnetic isolation materials and is combined with the magnetic isolation sleeve, so that the magnetic leakage of the whole magnetic circuit is less, and the magnetic performance of the magnetic steel is fully utilized.
The magnetic isolation partition plate is provided with corresponding through holes for connecting the magnetic steels, the rotor magnetic circuit adopts a parallel structure, and the rotor magnetic poles formed by magnetic conductive materials have good air gap magnetic field waveform sine waveform, so that torque fluctuation can be effectively controlled, and rectangular waves are prevented from being generated.
The through hole is the same as the cross section of the magnetic steel in shape, the shape of the through hole is 0.1 mm larger than the corresponding size of the cross section of the magnetic steel in shape, the installation is convenient, and the accuracy of fixing the magnetic steel in the magnetic steel installation groove can be ensured.
The last rotor fan that is fixed with of magnetic pole core adopts this kind of design, utilizes the fixed magnetic pole of magnetic pole fixed key to press the piece, can effectually reduce the volume of fan and used part, separates the effect that the magnetic end plate had both played fixed fan simultaneously, plays the effect of fixed magnet steel again the utility model discloses in through once fixed just accomplished magnet steel, magnetic pole towards the fixed of piece and fan.
The rotor fan comprises a magnetic isolation end plate and fan blades, wherein the magnetic isolation end plate and the fan blades are of an integral L type structure, parts are further reduced, the structure is simplified, and the size is smaller.
The utility model has the advantages that:
1. the design of the double rotors realizes the long and thin rotors required by the high-voltage, high-power, low-speed and high-torque double-rotor permanent magnet intelligent driving system, and the double rotors have high torque and high operation accuracy;
2. the magnetic pole punching sheet is connected with the dovetail groove of the magnetic steel mounting groove and is designed with the magnetic isolation end plate fan, so that the manufacturing cost of system project engineering is reduced, and the magnetic isolation end plate fan is small in size, light in weight, high in power density and high in reliability;
3. the use of the magnetostrictive material can enable the diameter of the rotor to be properly increased in the radial direction in the use process, further reduce the air gap between the rotor and the stator on the premise of not sweeping the chamber, improve the utilization rate of magnetic flux and increase the output power of the motor.
Drawings
Fig. 1 is a rotor structure diagram of a high-voltage dual-rotor magnetic circuit structure of the present invention;
fig. 2 is a side view of a rotor of a high-voltage dual-rotor magnetic circuit structure according to the present invention;
fig. 3 is a schematic view of a rotor magnetic steel mounting groove of the high-pressure dual-rotor magnetic circuit structure of the present invention;
illustration of the drawings: the rotor comprises a rotating shaft, 2 magnetic isolation partition plates, 3 magnetic pole iron cores, 4 magnetic pole reinforcing keys, 5 right magnetic isolation sleeves, 51 left magnetic isolation sleeves, 6 right rotor supports, 61 left rotor supports, 611 left rotor support outer cylinders, 612 left rotor support webs, 7 right magnetic steels, 71 left magnetic steels, 8 magnetic pole punching sheets, 9 magnetic steel mounting grooves, 10 magnetic pole reinforcing key mounting holes, 11 magnetic steel blocking sheets, 12 magnetic steel mounting positioning holes, 13 nuts and 14 rotor fans.
Detailed Description
The invention is described in detail below with reference to the following figures and specific embodiments:
the specific embodiment is as follows:
in the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
The first embodiment is as follows:
a high-voltage dual-rotor magnetic circuit structure is used for a 1000KW, 10KV large-scale high-voltage frequency conversion low-speed large-torque permanent magnet synchronous motor, the length-diameter ratio of a rotor is 15, a right rotor support 6, a magnetic isolation partition plate 2 and a left rotor support 61 are sleeved on an outer cylindrical surface of a rotor rotating shaft 1 from right to left, the magnetic isolation partition plate 2 is a middle ring, the right rotor support 6 and the left rotor support 61 are identical in structure, the left rotor support 61 is taken as an example, a left rotor support outer cylinder 611 is fixedly sleeved on the outer cylindrical surface of the rotor rotating shaft 1 through a left rotor support web 612 and is limited by a flat key to rotate relative to the rotor rotating shaft 1, the right rotor support 6, the magnetic isolation partition plate 2 and the left rotor support 61 are tightly abutted together, a magnetic isolation sleeve is sleeved on each rotor support 61, namely, a left magnetic isolation sleeve 51 is sleeved on each left rotor support 61, a dovetail magnetic isolation sleeve 5 is sleeved on each magnetic isolation sleeve 6, a magnetic isolation sleeve 3 is installed on each magnetic isolation sleeve, a magnetic pole 3 is provided with a magnetic isolation sleeve, a magnetic isolation mounting groove 9 is arranged between adjacent magnetic pole iron cores 3, a magnetic isolation sleeve 9, a magnetic isolation mounting groove 9 is fixed with a magnetic isolation sleeve, a magnetic isolation sleeve is manufactured by a magnetic pole corresponding to a magnetic pole, a magnetic isolation magnetic pole 5, a magnetic isolation magnetic pole, a magnetic isolation sleeve, a magnetic isolation magnetic pole 5 magnetic isolation magnetic pole corresponding to a magnetic pole inner magnetic pole of a magnetic pole 5 magnetic pole outer cylinder is manufactured by a magnetic pole outer cylinder, a magnetic pole outer cylinder 5 magnetic pole outer cylinder and a magnetic pole inner magnetic pole outer cylinder, a magnetic isolation magnetic pole inner magnetic pole 5 magnetic pole, a magnetic pole inner magnetic pole, a magnetic pole outer cylinder of a magnetic pole 5 magnetic pole inner magnetic pole corresponding to a magnetic pole inner magnetic pole lamination magnetic pole, a magnetic pole lamination, a magnetic pole.
Example two:
a high-pressure double-rotor magnetic circuit structure is used for a 1300KW, 10KV large-scale high-pressure frequency conversion low-speed large-torque permanent magnet synchronous motor, the length-diameter ratio of a rotor is 18, a right rotor support 6, a magnetic isolation partition plate 2 and a left rotor support 61 are sleeved on an outer cylindrical surface of a rotor rotating shaft 1 from right to left, the magnetic isolation partition plate 2 is a middle ring, the right rotor support 6 and the left rotor support 61 are identical in structure, taking the left rotor support 61 as an example, a left rotor support outer cylinder 611 is fixedly sleeved on the outer cylindrical surface of the rotor rotating shaft 1 through a left rotor support web 612 and is limited by a flat key to rotate relative to the rotor rotating shaft 1 on the rotor rotating shaft 1, the right rotor support 6, the magnetic isolation partition plate 2 and the left rotor support 61 are tightly abutted together, a magnetic isolation sleeve is sleeved on each rotor support, namely, a left magnetic isolation sleeve 51 is sleeved on the left rotor support 61, a dovetail magnetic isolation sleeve 5 is sleeved on the right rotor support 6, a magnetic isolation sleeve 3 is provided with a magnetic isolation sleeve, a magnetic pole mounting groove 9 is provided with a magnetic isolation mounting groove 9, a magnetic isolation mounting groove 7 is provided with a magnetic pole, a magnetic isolation sleeve, a magnetic pole mounting groove 7 is provided with a magnetic isolation mounting groove, a magnetic pole corresponding magnetic isolation plate, a magnetic isolation sleeve, a magnetic isolation magnetic pole mounting groove 5 is provided with a magnetic pole mounting groove 5, a magnetic pole mounting groove, a magnetic isolation magnetic pole mounting groove, a magnetic isolation magnetic pole mounting groove 7 magnetic pole mounting groove, a magnetic pole mounting groove 7 magnetic pole corresponding to a magnetic pole mounting groove 7 magnetic pole mounting groove, a magnetic pole mounting groove 7 magnetic pole mounting groove, a magnetic pole mounting groove 7 magnetic pole mounting groove corresponding to a magnetic pole mounting groove, a magnetic pole mounting groove 7 magnetic pole mounting groove, a magnetic pole mounting groove 7 magnetic pole mounting groove, a.
Example three:
a high-pressure double-rotor magnetic circuit structure is used for a 900KW, 10KV large-scale high-pressure frequency conversion low-speed large-torque permanent magnet synchronous motor, the length-diameter ratio of a rotor is 13, a right rotor support 6, a magnetic isolation partition plate 2 and a left rotor support 61 are sleeved on an outer cylindrical surface of a rotor rotating shaft 1 from right to left, the magnetic isolation partition plate 2 is a middle ring, the right rotor support 6 and the left rotor support 61 are identical in structure, taking the left rotor support 61 as an example, a left rotor support outer cylinder 611 is fixed on the outer cylindrical surface of the rotor rotating shaft 1 through a left rotor support web 612 and is sleeved on the outer cylindrical surface of the rotor rotating shaft 1 through a flat key and is limited to rotate relative to the rotor rotating shaft 1 through a magnetic isolation cylinder 5, each magnetic isolation cylinder 6, the magnetic isolation partition plate 2 and the left rotor support 61 are tightly abutted together, each rotor support is sleeved with a magnetic isolation cylinder 51, a right dovetail magnetic isolation cylinder 6 is sleeved on the left rotor support 61, a magnetic isolation cylinder 5 is sleeved on the left rotor support 6, each magnetic isolation cylinder is provided with a magnetic isolation cylinder 3, each magnetic isolation cylinder 3, a magnetic isolation cylinder 5 is provided with a magnetic isolation cylinder, a magnetic isolation cylinder 5, a magnetic isolation cylinder 7 is provided with a magnetic isolation cylinder 7, a magnetic isolation cylinder 5, a magnetic isolation cylinder 7 is provided with a magnetic isolation cylinder 5, a magnetic isolation cylinder is provided with a magnetic isolation cylinder 7 magnetic isolation cylinder, a magnetic isolation cylinder 7 is provided with a magnetic isolation cylinder, a magnetic isolation cylinder 7 magnetic isolation cylinder, a magnetic isolation cylinder 5, a magnetic isolation cylinder is provided with a magnetic isolation cylinder, a magnetic isolation cylinder 7 magnetic isolation cylinder, a magnetic isolation cylinder is provided with a magnetic isolation cylinder, a magnetic isolation magnetic cylinder, a magnetic isolation magnetic.
The foregoing has outlined broadly some of the aspects and features of the various embodiments, which should be construed to be merely illustrative of various potential applications. Other beneficial results can be obtained by applying the disclosed information in a different manner or by combining various aspects of the disclosed embodiments. Other aspects and a more complete understanding may be obtained by reference to the detailed description of the exemplary embodiments taken in conjunction with the accompanying drawings, based on the scope defined by the claims.
Furthermore, the utility model discloses on the basis of above-mentioned embodiment, still disclosed following technical scheme:
the first scheme is as follows:
be fixed with rotor fan 14 on the magnetic pole iron core 3, rotor fan 14 includes magnetic isolation end plate and flabellum, magnetic isolation end plate and flabellum are integral L type structure, are equipped with the through-hole on the magnetic isolation end plate, and the both ends at magnetic pole reinforcement key 4 are established to the through-hole cover to fix the tip at magnetic pole reinforcement key with nut 13, the size of magnetic isolation end plate along the circumferencial direction is greater than the size of magnetic pole towards piece 8, is used for blocking the axial displacement of magnet steel along the rotor than the big part of magnetic pole towards piece 8.
Scheme II:
be equipped with rectangular magnet steel mounting groove 9 between adjacent magnetic pole iron core 3, magnet steel mounting groove 9 internal fixation has the magnet steel, and the outer cylinder face end in magnet steel mounting groove 9 is equipped with magnet steel separation blade 11, is used for preventing that the magnet steel from throwing away from magnet steel mounting groove 9, magnet steel separation blade 11 is split type structure, sets up respectively on the diameter direction both sides of the fan ring structure of adjacent two magnetic pole towards piece 8, and is close to outer disc.
The third scheme is as follows:
be equipped with rectangular magnet steel mounting groove 9 between adjacent magnetic pole iron core 3, magnet steel mounting groove 9 internal fixation has the magnet steel, and the cylindrical surface end outside magnet steel mounting groove 9 is equipped with magnet steel separation blade 11, is used for preventing that the magnet steel from throwing away from magnet steel mounting groove 9, magnet steel separation blade 11 is overall structure, just is close to the outer disc and is equipped with the fluting on the diameter direction both sides of the fan ring shaped structure of adjacent magnetic pole towards piece 8 to insert magnet steel separation blade 11 and establish in the fluting.
The above embodiments have explained the present invention in detail. Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and the changes, modifications, additions, reductions, and substitutions made by the person skilled in the art within the spirit of the present invention also belong to the protection scope of the present invention.
Claims (10)
1. A high-voltage dual-rotor magnetic circuit structure is characterized by being used for a large-scale high-voltage variable-frequency low-speed large-torque permanent magnet synchronous motor with 1500KW and 10KV, the length-diameter ratio of a rotor is larger than or equal to 11 and smaller than or equal to 20, the rotor comprises a rotating shaft, rotor supports, a magnetism isolating sleeve, a middle ring, a magnetic pole iron core and magnetic steel, the rotating shaft is sleeved with the two rotor supports which are close to each other, each rotor support is sleeved with the magnetism isolating sleeve, the magnetic pole iron core is installed on the outer cylindrical surface of each magnetism isolating sleeve, a magnetic steel installing groove is formed between the adjacent magnetic pole iron cores, the magnetic steel is fixed in the magnetic steel installing groove, the magnetism isolating sleeve is divided into an inner magnetism isolating layer and an outer fixing layer, the outer fixing layer is made of magnetostrictive.
2. The structure of claim 1, wherein the pole core is formed by laminating a plurality of pole pieces.
3. The high-voltage dual-rotor magnetic circuit structure as claimed in claim 2, wherein the pole piece has a through hole in the middle, and a pole reinforcing key is used to press the corresponding pole piece on the two magnetic isolation sleeves.
4. The high-voltage dual-rotor magnetic circuit structure as claimed in claim 3, wherein the pole piece is in a fan-ring shape.
5. The high-voltage dual-rotor magnetic circuit structure as claimed in claim 4, wherein a dovetail protrusion is disposed on an inner circumferential edge of the magnetic pole punching sheet, a dovetail groove is disposed on the outer fixing layer of the magnetism isolating sleeve, and the dovetail protrusion is fixed in the dovetail groove.
6. The structure of any one of claims 1-5, wherein the middle ring is a magnetic isolation spacer made of a magnetic isolation material.
7. The structure of claim 6, wherein the magnetic isolation partition plate has corresponding through holes for engaging the magnetic steel.
8. The structure of claim 7, wherein the through hole has the same shape as the cross-section of the magnetic steel, and the shape of the through hole is 0.1 mm larger than the corresponding dimension of the cross-section of the magnetic steel.
9. The structure of any one of claims 1-5, wherein a rotor fan is fixed on the pole core.
10. The structure of claim 9, wherein the rotor fan comprises a magnetic-isolating end plate and fan blades, and the magnetic-isolating end plate and the fan blades are of an integral L-type structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922340280.1U CN211018438U (en) | 2019-12-24 | 2019-12-24 | High-voltage dual-rotor magnetic circuit structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922340280.1U CN211018438U (en) | 2019-12-24 | 2019-12-24 | High-voltage dual-rotor magnetic circuit structure |
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| Publication Number | Publication Date |
|---|---|
| CN211018438U true CN211018438U (en) | 2020-07-14 |
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| CN201922340280.1U Active CN211018438U (en) | 2019-12-24 | 2019-12-24 | High-voltage dual-rotor magnetic circuit structure |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A high-voltage dual rotor magnetic circuit structure Granted publication date: 20200714 Pledgee: Qilu Bank Co.,Ltd. Rizhao Branch Pledgor: RIZHAO DONGFANG MOTOR Co.,Ltd. Registration number: Y2024370010078 |