CN109167498B - Rare earth permanent magnet magnetic levitation AC and DC motor - Google Patents
Rare earth permanent magnet magnetic levitation AC and DC motor Download PDFInfo
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- CN109167498B CN109167498B CN201810988526.3A CN201810988526A CN109167498B CN 109167498 B CN109167498 B CN 109167498B CN 201810988526 A CN201810988526 A CN 201810988526A CN 109167498 B CN109167498 B CN 109167498B
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- 229910052761 rare earth metal Inorganic materials 0.000 title claims abstract description 29
- 150000002910 rare earth metals Chemical class 0.000 title claims abstract description 29
- 238000005339 levitation Methods 0.000 title claims description 16
- 238000004804 winding Methods 0.000 claims abstract description 67
- 239000000725 suspension Substances 0.000 claims abstract description 15
- 229910000976 Electrical steel Inorganic materials 0.000 claims description 5
- 230000000694 effects Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 108
- BGPVFRJUHWVFKM-UHFFFAOYSA-N N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] Chemical compound N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] BGPVFRJUHWVFKM-UHFFFAOYSA-N 0.000 description 14
- 238000010586 diagram Methods 0.000 description 8
- 230000001939 inductive effect Effects 0.000 description 3
- 230000006698 induction Effects 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000012271 agricultural production Methods 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
Classifications
-
- 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
- H02K21/14—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/28—Layout of windings or of connections between windings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
The invention discloses a rare earth permanent magnet magnetic suspension alternating current/direct current motor, wherein a rotor is positioned in a stator, a plurality of stator magnets are uniformly distributed in an inner ring of the stator, a plurality of rotor magnets are uniformly distributed in an outer ring of the rotor, magnetic poles on one side of each stator magnet adjacent to each rotor magnet are identical, a stator iron core is arranged between every two stator magnets and fixed on the inner ring of the stator, the axial direction of the stator iron core is along the diameter direction of the stator, an input direct current three-phase winding is wound on the stator iron core, namely, a first direct current first phase U is wound on the first stator iron core, a second direct current second phase V is wound on a second stator iron core adjacent to the first stator iron core, a third direct current third phase W is wound on a third stator iron core adjacent to the second stator iron core, the input end of U, V, W is set to be a homonymous end, and the heteronymous end of the first group U, V, W winding is connected with the homonymous end of the second group U, V, W winding, and the input direct current three-phase windings are sequentially circulated. The invention reduces the friction loss of the motor during operation, and has high working efficiency and low loss.
Description
Technical Field
The invention relates to the field of motors, in particular to a rare earth permanent magnet magnetic suspension alternating current-direct current motor.
Background
An electric motor refers to an electromagnetic device that converts or transmits electric energy according to the law of electromagnetic induction, or converts one form of electric energy into another form of electric energy. The electric motor converts electric energy into mechanical energy (commonly known as a motor), and the electric generator converts mechanical energy into electric energy. The motor is denoted in the circuit by the letter "M" (old standard by "D"). Its main function is to generate driving torque as power source for electric appliances or various machines. The motor is a power device for converting electric energy into mechanical energy, and the motor utilizes an electrified coil to generate a rotating magnetic field and acts on a rotor (such as a squirrel-cage closed aluminum frame) to form magneto-electric power rotating torque so as to drive a motor shaft to rotate. The motor has higher working efficiency, no smoke dust and smell, no environmental pollution, less noise, very convenient use and control, can meet various operation requirements, and can be widely applied to various aspects of industrial and agricultural production, transportation, national defense, commercial and household appliances, medical appliances and the like. The motor has various varieties and various functions so as to meet various different use requirements, and along with the progress of technology, the motor has higher and higher requirements, wherein the motor has the requirements on the performance and the functional requirements on the adaptability of the use occasion. The existing conventional motor has low working efficiency, large loss and difficult heat dissipation.
Disclosure of Invention
The invention aims to solve the technical problems of providing a rare earth permanent magnet magnetic suspension alternating current/direct current motor, which adopts the design principle that magnets repel each other in the same polarity to enable a stator rotor to be in relative magnetic suspension, and the stator magnet pushes the rotor to reduce the running friction loss of the motor when the rotor rotates, so that the working efficiency of the motor is high, the loss is low, and the power generation can be performed while the power is output.
In order to solve the technical problems, the invention adopts the following technical scheme:
A rare earth permanent magnet magnetic suspension alternating current-direct current motor comprises a stator, stator magnets, stator iron cores, a rotor and rotor magnets, wherein the rotor is positioned in the stator, a plurality of stator magnets are uniformly distributed in an inner ring of the stator, a plurality of rotor magnets are uniformly distributed in an outer ring of the rotor, magnetic poles of one side, adjacent to the rotor magnets, of the stator magnets are identical, a stator iron core is arranged between every two stator magnets and is fixed to the inner ring of the stator, the axial direction of the stator iron core is along the diameter direction of the stator, an input direct current three-phase winding is wound on the stator iron cores, the input direct current three-phase winding is provided with a winding mode that a first stator iron core is wound with a direct current first phase U, a second stator iron core, adjacent to the first stator iron core, is wound with a direct current second phase V, a third stator iron core, adjacent to the second stator iron core is wound with a direct current third phase W, a fourth stator iron core, adjacent to the third stator iron core is wound with a direct current first phase U, a fifth stator iron core, the fifth stator iron core, adjacent to the fourth stator iron core is wound with a direct current second phase V, the first phase winding is wound with a direct current second phase V, the same number of the first phase winding is wound with a second phase winding, the same number of the first winding is wound with the second winding is wound with the first phase winding, the same number of the first winding is wound with the second winding is in turn, and the same number as the input winding is in the same number as the first winding, and the winding is in the mode.
Further, the output alternating current three-phase winding is further comprised, 4 adjacent stator iron cores are used as a group of virtual output iron cores, each group of virtual output iron cores is wound with an output closed coil, the A, B, C output ends are set to be identical-name ends, and the different-name ends of the first group A, B, C windings are connected with the identical-name ends of the second group A, B, C windings so that the output closed coils of the same output phase are connected in series.
Further, the stator is a magnetic steel ring or the stator and the stator core are integrally formed by silicon steel.
Further, the stator core is a silicon steel core.
Further, the number of the stator magnets is 12×n, where N represents a natural number.
Further, a motor outgoing line is arranged on a stator of the rare earth permanent magnet magnetic suspension alternating current/direct current motor, a stator end cover is fixed on one side of the stator, and the rotor is connected to a rotor connecting shaft.
Further, the stator end cover is fixed on the side face of the stator through bolts.
Compared with the prior art, the motor has the advantages that the motor with the structure is adopted, the homopolarity of the corresponding magnets of the stator and the rotor is N-pole, the distance between the rotor magnet and the stator magnet depends on the fact that the S-poles induced by the rotor magnets do not influence the stator magnets, only repulsive force is used for reducing the running friction loss of the motor, the working efficiency of the motor is high, the loss is low, and power is output and meanwhile power generation is carried out.
Drawings
Fig. 1 is a schematic diagram of the internal structure of the rare earth permanent magnet magnetic levitation ac/dc motor of the invention.
Fig. 2 is a schematic diagram of an input dc three-phase winding structure of the rare earth permanent magnet magnetic levitation ac/dc motor of the present invention.
Fig. 3 is an expanded schematic diagram of an input dc three-phase winding of the rare earth permanent magnet magnetic levitation ac/dc motor of the present invention.
Fig. 4 is a schematic diagram of a dc U-phase winding of the rare earth permanent magnet magnetic levitation ac/dc motor of the present invention.
Fig. 5 is a schematic diagram of a dc V-phase winding of the rare earth permanent magnet magnetic levitation ac/dc motor of the present invention.
Fig. 6 is a schematic diagram of a dc W-phase winding of the rare earth permanent magnet magnetic levitation ac/dc motor of the present invention.
Fig. 7 is a schematic diagram of an output ac three-phase winding of the rare earth permanent magnet magnetic levitation ac/dc motor of the present invention.
Fig. 8 is an expanded view of an output ac three-phase winding of the rare earth permanent magnet magnetic levitation ac/dc motor of the present invention.
Fig. 9 is an overall appearance diagram of the rare earth permanent magnet magnetic levitation ac/dc motor of the present invention.
In the figure, 1-stator, 2-stator magnet, 3-stator iron core, 4-rotor, 5-rotor magnet, 6-motor lead-out wire, 7-bolt, 8-rotor connecting shaft, 9-stator end cover, O represents winding DC three-phase center point, U, V, W (with the same meaning as numbers, only in different device positions for convenient description) represents Y-connection DC three-phase of input winding respectively, A, B, C (with the same meaning as numbers, only in different device positions for convenient description), O represents AC three-phase center point represents three-phase four-wire of output AC winding Y-connection respectively.
Detailed Description
The invention will be described in further detail with reference to the drawings and the detailed description.
Example 1
A rare earth permanent magnet magnetic suspension alternating current-direct current motor comprises a stator 1, stator magnets 2, stator iron cores 3, a rotor 4 and rotor magnets 5, wherein the rotor 4 is positioned in the stator 1, a plurality of stator magnets 2 are uniformly distributed in an inner ring of the stator 1, a plurality of rotor magnets 5 are uniformly distributed in an outer ring of the rotor 4, magnetic poles of one side, adjacent to the rotor magnets 5, of each stator magnet 2 are identical, a stator iron core 3 is arranged between every two stator magnets 2, the stator iron cores 3 are fixed on the inner ring of the stator 1, the axial direction of each stator iron core 3 is along the diameter direction of the stator 1, an input direct current three-phase winding is wound on each stator iron core 3, the winding mode is that a first direct current first phase U is wound on each stator iron core 3, a second direct current second phase V is wound on each second stator iron core 3, a third stator iron core 3 is wound on each second stator iron core 3, a direct current third phase W is wound on each third stator iron core 3, a fourth stator iron core 3 is wound on each third stator iron core 3, the third stator core 3 is wound on each third stator iron core 3, and the third stator iron core 3 is wound on the third stator iron core 3. The stator and the rotor are in relative magnetic suspension, so that the running friction loss of the motor is reduced, the working efficiency of the motor is high, and the loss is low.
In the invention, the stator magnet 2 and the rotor magnet 5 are opposite to each other in N poles, S poles are induced between the two rotor magnets 5 to determine the distance between the rotor magnet 5 and the stator magnet 2 without affecting the N poles of the stator magnet 2, meanwhile, the maximum repulsive force between the stator magnet 2 and the rotor magnet 5 is kept, the rotor 4 corresponds to Shan Ciji rotor, the rotor is suspended in the center of the stator due to the repulsion of the stator magnet 2 and the rotor magnet 5, the rotor 4 rotates due to the rotary magnetic field formed by the action of the stator iron core 3, the N poles of the rotor magnet 5 and the induced S poles, and the rotor increases the torque due to the repulsion of the stator magnet 2 and the rotor magnet 5 during the rotation of the rotor 4.
In the invention, a direct current three-phase winding is unfolded, a Y connection method of the direct current three-phase winding is represented by U, V, W in fig. 2 and 3, a center point of the direct current three-phase winding is represented by O, a direct current signal is input from a U end to enable a U-phase winding iron core to be N-pole and N-pole of a rotor magnet 5 to repel each other, the direct current signal is input from a V end to a V end through the center point O of the direct current winding to enable the V-phase winding iron core to be S-pole and enable the N-pole of the rotor magnet 5 to attract each other to the V-phase winding, a direct current signal is input from the V end to enable the V-phase winding iron core to be N-pole and the N-pole of the rotor magnet 5 to repel each other, the direct current signal is input from the W end to enable the N-pole and the N-pole of the rotor magnet 5 to attract each other through the center point O of the direct current winding to enable the N-pole and the S-pole of the W-phase winding iron core to attract each other to be N-pole of the rotor magnet 5 to be S-pole of the rotor magnet 5, and the direct current signal is input from the V end to enable the V-phase winding iron core to be N-pole and the U-pole and the N-pole of the U-phase winding iron core to be S-pole of the rotor magnet to be S pole to the rotor winding to the rotating, and the magnetic core to rotate sequentially, and the direct current signal is enabled to rotate, the magnetic signal is formed.
In fig. 1, the dotted line is the center line and the side line of the coaxial magnets of the stator 1 and the rotor 4, all the stator magnets 2 are set to be N poles corresponding to the direction of the rotor 4, all the rotor magnets 5 are set to be N poles corresponding to the direction of the stator 1, the magnetic saturation quantity of the S poles inducing different magnetic poles between adjacent magnets of the stator magnets 2 is about 30% of the N poles of the magnet, the effect of the S poles on the rotor magnets 5 is very small, the stator 1 is regarded as a single-pole stator, the magnetic saturation quantity of the S poles inducing different magnetic poles between adjacent magnets of the rotor magnets 5 is about 30% of the N poles of the magnet, the effect of the S poles on the stator magnets 2 is very small, the rotor 4 is regarded as a single-pole rotor, and the distance between the stator magnets 2 and the rotor magnets 5 depends on the mutual influence of the S poles inducing the stator magnets 2 and the rotor magnets 5, and the maximum repulsive force between the stator magnets 2 and the rotor magnets 5 is ensured.
In the invention, a stator core 3 guides a stator induction magnetic pole S pole to the direction of a rotor magnet 5, a DC three-phase winding is wound on the stator core 3 to generate N, S poles which are alternately changed, and attraction and repulsion force are carried out on N poles and induction S poles of the rotor magnet 5 to form a rotating magnetic field so as to enable a rotor 4 to rotate, an AC three-phase winding Y connection method is adopted between the stator core 3 in fig. 7 and 8, the rotor 4 cuts magnetic force lines of the AC winding in the rotating process, the AC three-phase winding is denoted by A, B, C, and the center point of the three-phase winding is denoted by O.
Example 2
A rare earth permanent magnet magnetic suspension alternating current-direct current motor comprises a stator 1, stator magnets 2, stator iron cores 3, a rotor 4 and rotor magnets 5, wherein the rotor 4 is positioned in the stator 1, a plurality of stator magnets 2 are uniformly distributed in an inner ring of the stator 1, a plurality of rotor magnets 5 are uniformly distributed in an outer ring of the rotor 4, magnetic poles of one side, adjacent to the rotor magnets 5, of each stator magnet 2 are identical, a stator iron core 3 is arranged between every two stator magnets 2, the stator iron cores 3 are fixed on the inner ring of the stator 1, the axial direction of each stator iron core 3 is along the diameter direction of the stator 1, an input direct current three-phase winding is wound on each stator iron core 3, the winding mode is that a first direct current first phase U is wound on each stator iron core 3, a second direct current second phase V is wound on each second stator iron core 3, a third stator iron core 3 is wound on each second stator iron core 3, a direct current third phase W is wound on each third stator iron core 3, a fourth stator iron core 3 is wound on each third stator iron core 3, the third stator core 3 is wound on each third stator iron core 3, and the third stator iron core 3 is wound on the third stator iron core 3. The stator core assembly also comprises output alternating current three-phase windings, wherein adjacent 4 stator cores 3 are used as a group of virtual output cores, each group of virtual output cores is wound with output closed coils, and the output closed coils of the same output phase are connected in series.
Example 3
A rare earth permanent magnet magnetic suspension alternating current-direct current motor comprises a stator 1, stator magnets 2, stator iron cores 3, a rotor 4 and rotor magnets 5, wherein the rotor 4 is positioned in the stator 1, a plurality of stator magnets 2 are uniformly distributed in an inner ring of the stator 1, a plurality of rotor magnets 5 are uniformly distributed in an outer ring of the rotor 4, magnetic poles of one side, adjacent to the rotor magnets 5, of each stator magnet 2 are identical, a stator iron core 3 is arranged between every two stator magnets 2, the stator iron cores 3 are fixed on the inner ring of the stator 1, the axial direction of each stator iron core 3 is along the diameter direction of the stator 1, an input direct current three-phase winding is wound on each stator iron core 3, the winding mode is that a first direct current first phase U is wound on each stator iron core 3, a second direct current second phase V is wound on each second stator iron core 3, a third stator iron core 3 is wound on each second stator iron core 3, a direct current third phase W is wound on each third stator iron core 3, a fourth stator iron core 3 is wound on each third stator iron core 3, the third stator core 3 is wound on each third stator iron core 3, and the third stator iron core 3 is wound on the third stator iron core 3. The stator 1 is a magnetic steel ring. The stator core 3 is a silicon steel core.
Example 4
A rare earth permanent magnet magnetic suspension alternating current-direct current motor comprises a stator 1, stator magnets 2, stator iron cores 3, a rotor 4 and rotor magnets 5, wherein the rotor 4 is positioned in the stator 1, a plurality of stator magnets 2 are uniformly distributed in an inner ring of the stator 1, a plurality of rotor magnets 5 are uniformly distributed in an outer ring of the rotor 4, magnetic poles of one side, adjacent to the rotor magnets 5, of each stator magnet 2 are identical, a stator iron core 3 is arranged between every two stator magnets 2, the stator iron cores 3 are fixed on the inner ring of the stator 1, the axial direction of each stator iron core 3 is along the diameter direction of the stator 1, an input direct current three-phase winding is wound on each stator iron core 3, the winding mode is that a first direct current first phase U is wound on each stator iron core 3, a second direct current second phase V is wound on each second stator iron core 3, a third stator iron core 3 is wound on each second stator iron core 3, a direct current third phase W is wound on each third stator iron core 3, a fourth stator iron core 3 is wound on each third stator iron core 3, the third stator core 3 is wound on each third stator iron core 3, and the third stator iron core 3 is wound on the third stator iron core 3. The number of the stator magnets 2 is 12×n, where N represents a natural number.
Example 5
A rare earth permanent magnet magnetic suspension alternating current-direct current motor comprises a stator 1, stator magnets 2, stator iron cores 3, a rotor 4 and rotor magnets 5, wherein the rotor 4 is positioned in the stator 1, a plurality of stator magnets 2 are uniformly distributed in an inner ring of the stator 1, a plurality of rotor magnets 5 are uniformly distributed in an outer ring of the rotor 4, magnetic poles of one side, adjacent to the rotor magnets 5, of each stator magnet 2 are identical, a stator iron core 3 is arranged between every two stator magnets 2, the stator iron cores 3 are fixed on the inner ring of the stator 1, the axial direction of each stator iron core 3 is along the diameter direction of the stator 1, an input direct current three-phase winding is wound on each stator iron core 3, the winding mode is that a first direct current first phase U is wound on each stator iron core 3, a second direct current second phase V is wound on each second stator iron core 3, a third stator iron core 3 is wound on each second stator iron core 3, a direct current third phase W is wound on each third stator iron core 3, a fourth stator iron core 3 is wound on each third stator iron core 3, the third stator core 3 is wound on each third stator iron core 3, and the third stator iron core 3 is wound on the third stator iron core 3. The stator 1 of the rare earth permanent magnet magnetic suspension alternating current-direct current motor is provided with a motor outgoing line 6, one side of the stator 1 is fixed with a stator end cover 9, the rotor 4 is connected to a rotor connecting shaft 8, and the stator end cover 9 is fixed on the side face of the stator 1 through a bolt 7.
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810988526.3A CN109167498B (en) | 2018-08-28 | 2018-08-28 | Rare earth permanent magnet magnetic levitation AC and DC motor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810988526.3A CN109167498B (en) | 2018-08-28 | 2018-08-28 | Rare earth permanent magnet magnetic levitation AC and DC motor |
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| CN109167498A CN109167498A (en) | 2019-01-08 |
| CN109167498B true CN109167498B (en) | 2025-01-10 |
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| CN201810988526.3A Active CN109167498B (en) | 2018-08-28 | 2018-08-28 | Rare earth permanent magnet magnetic levitation AC and DC motor |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104935099A (en) * | 2014-03-21 | 2015-09-23 | 刘荣坤 | Three-phase AC and DC dual-purpose synchronous motor |
| CN106602760A (en) * | 2017-01-19 | 2017-04-26 | 杨济阁 | Rare-earth permanent-magnet magnetic levitation motor |
| CN213151870U (en) * | 2018-08-28 | 2021-05-07 | 杨济阁 | Rare-earth permanent-magnet magnetic suspension AC/DC motor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101820190A (en) * | 2010-01-22 | 2010-09-01 | 王铂仕 | Motor with strong weak air-gap field in alternative distribution |
| CN101951204A (en) * | 2010-03-02 | 2011-01-19 | 高宗大 | Magnetic converting engine |
| CN101951099A (en) * | 2010-08-25 | 2011-01-19 | 哈尔滨工业大学 | High-performance direct-current (DC) output permanent magnet generator system |
| CN102684350A (en) * | 2011-03-12 | 2012-09-19 | 李贵祥 | Power generator based on double-acting iron core winding |
| CN103715853A (en) * | 2014-01-03 | 2014-04-09 | 天津大学 | Bearingless doubly-salient permanent-magnet switched reluctance motor with axial and radial hybrid excitation |
| CN105790467B (en) * | 2016-04-25 | 2018-05-01 | 山东理工大学 | Mixing exciter panel type motor |
| CN105827159B (en) * | 2016-05-13 | 2018-12-25 | 福州大学 | A kind of three-phase bearing-free flux switch motor rotor suspension control method |
| CN106849800A (en) * | 2017-04-13 | 2017-06-13 | 齐桂杰 | Motor driven systems |
| CN107994694B (en) * | 2017-12-30 | 2024-02-27 | 保定市硕成科技有限公司 | Low-loss permanent magnet direct current motor |
| CN108226610B (en) * | 2018-03-16 | 2023-12-26 | 华中科技大学 | Clamp type measuring device for alternating current and direct current small current |
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2018
- 2018-08-28 CN CN201810988526.3A patent/CN109167498B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104935099A (en) * | 2014-03-21 | 2015-09-23 | 刘荣坤 | Three-phase AC and DC dual-purpose synchronous motor |
| CN106602760A (en) * | 2017-01-19 | 2017-04-26 | 杨济阁 | Rare-earth permanent-magnet magnetic levitation motor |
| CN213151870U (en) * | 2018-08-28 | 2021-05-07 | 杨济阁 | Rare-earth permanent-magnet magnetic suspension AC/DC motor |
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