CN112769265A - Novel split-phase permanent magnet synchronous servo motor - Google Patents
Novel split-phase permanent magnet synchronous servo motor Download PDFInfo
- Publication number
- CN112769265A CN112769265A CN202110034131.1A CN202110034131A CN112769265A CN 112769265 A CN112769265 A CN 112769265A CN 202110034131 A CN202110034131 A CN 202110034131A CN 112769265 A CN112769265 A CN 112769265A
- Authority
- CN
- China
- Prior art keywords
- phase
- stator
- permanent magnet
- split
- motor
- Prior art date
- 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.)
- Pending
Links
- 230000001360 synchronised effect Effects 0.000 title claims abstract description 14
- 238000004804 winding Methods 0.000 claims abstract description 36
- 238000007789 sealing Methods 0.000 claims abstract description 8
- 230000004907 flux Effects 0.000 claims abstract description 4
- 238000003475 lamination Methods 0.000 claims description 8
- 239000004020 conductor Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 229910000976 Electrical steel Inorganic materials 0.000 claims description 3
- 239000000696 magnetic material Substances 0.000 claims description 2
- 238000002955 isolation Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
Images
Classifications
-
- 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
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
-
- 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
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/16—Stator cores with slots for windings
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The invention relates to the technical field of motors, in particular to a novel phase-splitting permanent magnet synchronous servo motor which comprises a shell, an end cover, a phase-splitting stator laminated assembly and a phase-splitting rotor laminated assembly. The split-phase stator laminated assembly comprises a stator core, a split-phase winding, a stator connecting sheet and a stator end seal; the split-phase rotor laminated assembly comprises a rotor shaft, permanent magnet blocks, a rotor connecting sheet and a magnet sealing ring. The stator core is divided into three groups along the axial direction: the stator comprises a group A, a group B and a group C, wherein the middle parts of two adjacent groups of stator cores are connected by a stator connecting sheet, and the two ends of the stator cores are sealed and fixed by stator ends. And assembling the three groups of stators according to the corresponding phase difference according to the pole pair number determined in the design of the motor. The rotor shaft is axially divided into three sections corresponding to the stator core: the sections A, B and C are fixed with the same number of permanent magnet blocks in each phase area. The number of the permanent magnet blocks is also set into three groups according to the number of the split-phase windings, and the three groups of permanent magnet blocks are fixed according to corresponding phase differences as the three groups of stators. The novel split-phase permanent magnet synchronous servo motor does not need to detect the position change of a magnetic field through a Hall element, and the cost is saved. After three-phase current is conducted, the three wires U, V, W drive the A, B, C parts to operate simultaneously, the magnetic flux density and the torque are greatly improved, and the power which is nearly three times that of a conventional motor is obtained.
Description
Technical Field
The invention relates to the technical field of motors, in particular to a novel split-phase permanent magnet synchronous servo motor.
Background
The traditional permanent magnet synchronous motor has the advantages of simple structure, small volume, small loss and the like, and is widely applied to the fields of servo systems, electric automobiles, rail transit and the like.
In the stator structure of the conventional motor such as a synchronous motor and an asynchronous motor, the stator winding is fixed through the stator slot, and the three-phase winding is concentrated on one stator structure and fixed to form a complete stator.
In recent years, there has been a new type of coreless technology. For the brushless inner rotor hollow cup motor, the stator structure is also that three-phase windings are wound together and bonded into a complete stator.
For the two types of motors, the rotor permanent magnets are combined on the rotor shaft in different structural forms by three phases.
The invention is provided for overcoming the defects of complex winding process, small power and the like of the winding.
Disclosure of Invention
The invention aims to provide a novel split-phase permanent magnet synchronous servo motor with high power, high efficiency and low cost.
The invention provides a novel split-phase permanent magnet synchronous servo motor. The split-phase type stator lamination assembly comprises a shell, an end cover, a split-phase type stator lamination assembly and a split-phase type rotor lamination assembly.
The stator structure form of the invention is a split-phase stator laminated assembly, which comprises a stator core, a split-phase winding, a stator connecting sheet and a stator end seal.
The stator core is formed by laminating silicon steel sheets and is axially divided into three phases: the stator core comprises a phase A, a phase B and a phase C, wherein adjacent two phases of stator cores are axially overlapped; all phases are connected by stator connecting sheets, and two ends are sealed and fixed by stator ends.
And winding slots corresponding to the split-phase poles are reserved in the stator core of each phase according to the pole pair number determined in the design of the motor and used for fixing windings of the corresponding phase of the motor.
The split-phase winding is formed by A, B, C three phases, and the multi-component split-phase winding can be arranged along the axial direction to increase the power of the motor along with the extension of the stator core under the condition of not changing the diameter of the stator core. Based on one group of split-phase windings, the number of windings added can be n groups (n is a natural number).
The split-phase stator laminated assembly assembles three-phase stator cores according to corresponding phase differences according to the number of pole pairs determined during motor design, so that the phase cores are compared at a 0-degree comparison point by using an A-phase starting coil winding, and the phase difference is formed between each phase stator core and the other two phases of stator cores when each phase stator core is stacked. The A, B, C three-phase winding stacking can be carried out at different angle differences according to different pole numbers of the motor design; the larger the number of pole pairs, the smaller the phase difference.
The stator connecting sheet is made of a non-magnetic-conducting material, and carries out magnetic isolation on A, B, C three groups of stator cores, so that the magnetic field among the stator connecting sheets is not influenced.
The invention discloses a rotor structure in the form of a split-phase rotor laminated assembly, which comprises a rotor shaft, permanent magnet blocks, a rotor connecting sheet and a magnet sealing ring.
The rotor shaft is axially divided into three phase regions corresponding to the stator core: the permanent magnet blocks with the same number as the poles of the motor are fixed in each phase area of the A phase, the B phase and the C phase.
The permanent magnet blocks are formed by A, B, C three phases, and multiple groups of magnets can be arranged along the axial direction along with the extension of the rotor shaft under the condition of not changing the diameter of the rotor shaft so as to increase the power of the motor. The number of magnet groups increased based on one group of magnets is n (n is a natural number).
When the number of the groups of the stator and the rotor is increased, the number of the stator and the rotor is the same.
In the structure of the split-phase rotor laminated assembly, the number of permanent magnet blocks of each phase is the same as the number of poles of a motor, A, B, C three phases are set, the three-phase permanent magnet blocks are fixed on a rotor shaft according to corresponding phase differences, the initial permanent magnet block of each phase is taken as a 0-degree comparison point, the phase difference between the magnets of each phase and the magnets of the other two phases can be stacked according to different designed poles of the motor, and the phase difference is smaller when the number of pole pairs is larger.
Two adjacent sections of permanent magnet blocks are connected by a rotor connecting sheet, and two ends of the permanent magnet blocks are fixed by magnet sealing rings.
The rotor connecting sheet is made of a non-magnetic-conducting material, and carries out magnetic isolation on A, B, C three-phase permanent magnet blocks, so that the mutual magnetic field is not influenced.
In order to combine the magnet and the rotor shaft tightly, the rotor shaft and the magnet can be combined in a surface mode, and the shape of the rotor shaft of the combining part is a symmetrical polygon; the shaft and the magnet may be engaged with each other by a slot fitting method.
The novel split-phase permanent magnet synchronous servo motor does not need to detect the position change of a magnetic field through a Hall element, and the cost is saved. After three-phase current is conducted, the three leads U, V, W drive A, B, C three groups of coils to work simultaneously, the magnetic flux density and the torque are greatly improved, and the power which is nearly three times that of a conventional motor is obtained, namely P is PU+PV+PW。
Preferably, according to different use environments, the three-phase current incoming and outgoing line ends can be concentrated outgoing lines or divided into three port split-phase outgoing lines, namely U1U2Mouth, V1V2Mouth, W1W2And the anti-electromagnetic interference condition can be improved.
Drawings
Fig. 1 is a schematic cross-sectional structure diagram according to an embodiment of the present invention.
Fig. 2 is a perspective view of a split-phase stator core stack assembly in an embodiment of the invention.
Fig. 3 is a schematic plan view of a concentrated incoming/outgoing line terminal according to an embodiment of the present invention.
FIG. 4 is a schematic plan view of the split-phase inlet/outlet line according to the embodiment of the present invention.
In the figure: 1. a housing; 2. an end cap; 3. a split-phase stator stack assembly; 31. a stator core; 32. split-phase winding; 33. a winding slot; 34. a stator connecting sheet; 35. sealing the end of the stator; 4. a split-phase rotor assembly; 41. a rotor shaft; 42. permanent magnet blocks; 43. a rotor connecting sheet; 44. sealing a ring by a magnet; 5. a bearing; 6. a screw; 7. ABC three-phase centralized outlet terminal; 8. a split-phase outlet terminal; 81. an A phase outlet end; 82. a phase B outgoing line end; 83. and C phase outlet terminal.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following specific examples are merely illustrative of the invention and are not to be construed as limiting the invention.
As shown in fig. 1, the embodiment of the present invention provides a novel phase-splitting permanent magnet synchronous servo motor, which includes a housing 1, an end cover 2, a phase-splitting stator lamination assembly 3, and a phase-splitting rotor lamination assembly 4.
The split-phase stator laminated assembly 3 comprises a stator core 31, a split-phase winding 32, a stator connecting sheet 34 and a stator end seal 35.
The stator core 31 is formed by stacking silicon steel sheets, and is axially divided into three phases: the adjacent two phases of the A phase, the B phase and the C phase of the stator core 31 are connected by a stator connecting sheet 34, and two ends of the stator core are fixed by a stator end seal 35.
As shown in fig. 2, the stator core 31 of each phase has a number of pole pairs determined in the design of the motor, and winding slots 33 corresponding to the number of pole pairs are left for fixing the split phase windings 32.
The split-phase windings 32 are formed by A, B, C three phases, and the multi-split-phase windings can be arranged along the axial direction to increase the power of the motor along with the extension of the stator core 31 under the condition of not changing the diameter of the stator core. One group of split-phase windings is used as a base number, and the number of the added windings is n groups (n is a natural number)
The split-phase stator laminated assembly 3 is characterized in that three-phase stator cores 31 are assembled according to corresponding phase differences according to the number of pole pairs determined in the design of the motor, so that the A-phase starting coil winding of each phase of the core is taken as a 0-degree comparison point, and the phase difference between each phase of stator core and the other two phases of core can be subjected to A, B, C three-phase winding stacking according to different angle differences according to the number of poles designed by the motor; the larger the number of pole pairs, the smaller the phase difference.
The stator connecting sheet 34 is made of a non-magnetic material, and is used for carrying out magnetic isolation on A, B, C three groups of stator cores 31, so that a magnetic field between the stator connecting sheet and the stator cores is not influenced.
The split-phase rotor lamination assembly 4 comprises a rotor shaft 41, permanent magnet blocks 42, a rotor connecting sheet 43 and a magnet sealing ring 44.
The rotor shaft 41 is axially divided into three phase regions corresponding to the stator core 31: the same number of permanent magnets 42 are fixed in each phase region of the phase A, the phase B and the phase C.
The permanent magnet blocks 42 are grouped into A, B, C three phases, and multiple groups of magnets can be arranged along the axial direction to increase the power of the motor along with the extension of the rotor shaft under the condition of not changing the diameter of the rotor shaft 41. The number of magnet groups increased based on one group of magnets is n (n is a natural number).
In the structure of the split-phase rotor laminated assembly 4, the number of each phase of permanent magnet blocks 42 is the same as the number of poles of the motor, A, B, C three phases are set, the three-phase permanent magnet blocks are fixed on the rotor shaft 41 according to corresponding phase differences, each phase of permanent magnet blocks takes the phase A initial permanent magnet block as a 0-degree contrast point, and the phase difference between each phase of permanent magnet and the other two phases of permanent magnet can be stacked according to the different number of poles designed by the motor; the larger the number of pole pairs, the smaller the phase difference.
Two adjacent sections of permanent magnet blocks 42 are connected by a rotor connecting sheet 43, and two ends are fixed by a magnet sealing ring 44.
The rotor connecting sheet 43 is made of a non-magnetic conducting material, and is used for carrying out magnetic isolation on A, B, C three sections of permanent magnet blocks 42, so that the magnetic field among the permanent magnet blocks is not influenced.
In order to combine the permanent magnet 42 and the rotor shaft 41 tightly, the rotor shaft and the magnet can be combined in a surface mode, and the shape of the rotor shaft of the combining part is a symmetrical polygon; the shaft and the magnet may be engaged with each other by a slot fitting method.
The novel split-phase permanent magnet synchronous servo motor does not need to detect the position change of a magnetic field through a Hall element, and the cost is saved. After three-phase current is conducted, the three leads U, V, W drive A, B, C three groups of coils to work simultaneously, the magnetic flux density and the torque are greatly improved, and the power which is nearly three times that of a conventional motor is obtained, namely P is PU+PV+PW。
As shown in fig. 3 and 4, the incoming and outgoing ends of the three-phase current can be concentrated or divided into three parts according to different use environmentsWith separate phase outlets, i.e. U1U2Mouth, V1V2Mouth, W1W2And the mouth can provide a condition for resisting electromagnetic interference.
Claims (18)
1. A novel phase-splitting permanent magnet synchronous servo motor comprises a shell, an end cover, a phase-splitting stator laminated assembly and a phase-splitting rotor laminated assembly.
2. The split-phase stator stack assembly of claim 1 comprising a stator core, split-phase windings, stator tabs, stator end seals.
3. The stator core according to claim 2, which is laminated with silicon steel sheets, and is axially divided into three phases: the stator comprises a phase A, a phase B and a phase C, wherein adjacent two phases of stator cores are axially overlapped, the phases are connected through a stator connecting sheet, and two ends of the stator connecting sheet are sealed and fixed through stator ends.
4. The stator core of each phase according to claim 3, wherein winding slots corresponding to the number of poles of the motor are reserved for fixing the windings of the corresponding phase of the motor according to the number of pole pairs determined during the design of the motor.
5. The split-phase winding according to claim 4, wherein A, B, C three phases are taken as a group, the multi-component winding can be arranged along the axial direction to increase the power of the motor along with the lengthening of the stator core under the condition of not changing the diameter of the stator core, and the number of the increased windings is n groups (n is a natural number) by taking the single-component winding as a base.
6. The split-phase stator laminated assembly according to claim 1, wherein three-phase stator cores are assembled according to corresponding phase differences according to the number of pole pairs determined during motor design, the A-phase starting coil winding of each phase core is taken as a 0-degree comparison point, and the phase difference between each phase stator core and the other two phases core during lamination can be A, B, C three-phase winding lamination according to different pole numbers of the motor design; the larger the number of pole pairs, the smaller the phase difference.
7. The stator connecting sheet of claim 2 is made of a non-magnetic material, and A, B, C three groups of stator cores are magnetically isolated, so that magnetic fields among the stator cores are not affected.
8. The split-phase rotor stack assembly of claim 1 comprising a rotor shaft, permanent magnets, rotor attachment tabs, and a magnet seal.
9. The rotor shaft of claim 8 divided axially into three phase zones corresponding to the stator core: the permanent magnet blocks with the same number as the poles of the motor are fixed in each phase area of the A phase, the B phase and the C phase.
10. The permanent magnet according to claim 9, wherein A, B, C three phases are used as a set, and a plurality of sets of magnets are axially arranged to increase the power of the motor as the rotor shaft is extended without changing the diameter of the rotor shaft, and the number of the increased sets of magnets is n (n is a natural number) based on one set of magnets.
11. The rotor of claim 10 and the stator of claim 5 must be the same in number when increasing the number of sets.
12. A structure as claimed in claim 8, wherein the number of permanent magnets of each phase is equal to the number of poles of the motor, the three phases are A, B, C, the three-phase permanent magnets are fixed on the rotor shaft according to the corresponding phase difference, the initial permanent magnet of phase A of each phase permanent magnet is 0 ° of the reference point, and the magnet phase difference of each phase of permanent magnet and the magnet phase difference of the other two phases of permanent magnet can be stacked according to the number of poles designed by the motor; the larger the number of pole pairs, the smaller the phase difference.
13. The two adjacent segments of permanent magnet blocks of claim 10 are connected by a rotor connecting piece, and both ends are fixed by a magnet sealing ring.
14. The rotor connecting sheet of claim 8 is made of a non-magnetic conducting material, and A, B, C three-phase permanent magnet blocks are magnetically isolated, so that a magnetic field between the three-phase permanent magnet blocks is not influenced.
15. In order to combine the magnet and the rotor shaft tightly, the rotor shaft and the magnet can be combined in a surface mode, and the shape of the rotor shaft of the combining part is a symmetrical polygon; the shaft and the magnet may be engaged with each other by a slot fitting method.
16. The novel split-phase permanent magnet synchronous servo motor according to claim 1 does not need a Hall element to detect the position change of a magnetic field, and saves cost.
17. After three-phase current is conducted, the three leads U, V, W drive A, B, C three groups of coils to work simultaneously, the magnetic flux density and the torque are greatly improved, and the power which is nearly three times that of a conventional motor is obtained, namely P is PU+PV+PW。
18. According to different use environments, the three-phase current inlet and outlet wire end of claim 12 can be centralized and divided into three port split phase outlet wires, namely, U1U2Mouth, V1V2Mouth, W1W2And the mouth can provide a condition for resisting electromagnetic interference.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110034131.1A CN112769265A (en) | 2021-01-12 | 2021-01-12 | Novel split-phase permanent magnet synchronous servo motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110034131.1A CN112769265A (en) | 2021-01-12 | 2021-01-12 | Novel split-phase permanent magnet synchronous servo motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112769265A true CN112769265A (en) | 2021-05-07 |
Family
ID=75701369
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110034131.1A Pending CN112769265A (en) | 2021-01-12 | 2021-01-12 | Novel split-phase permanent magnet synchronous servo motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112769265A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004159492A (en) * | 2002-10-18 | 2004-06-03 | Mitsubishi Electric Corp | Permanent magnet rotary electric machine |
| JP2009027904A (en) * | 2007-06-19 | 2009-02-05 | Hitachi Ltd | Rotating electric machine |
| WO2013107127A1 (en) * | 2012-01-22 | 2013-07-25 | 浙江大学 | Segmented permanent-magnet synchronized motor rotor structure |
| JP2014166016A (en) * | 2013-02-25 | 2014-09-08 | Hitachi Appliances Inc | Permanent magnet synchronous machine and compressor using the same |
| JP2020167792A (en) * | 2019-03-28 | 2020-10-08 | ダイキン工業株式会社 | Stator and motor with this stator |
| CN214626550U (en) * | 2021-01-12 | 2021-11-05 | 江苏海能动力科技有限公司 | Novel split-phase permanent magnet synchronous servo motor |
-
2021
- 2021-01-12 CN CN202110034131.1A patent/CN112769265A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004159492A (en) * | 2002-10-18 | 2004-06-03 | Mitsubishi Electric Corp | Permanent magnet rotary electric machine |
| JP2009027904A (en) * | 2007-06-19 | 2009-02-05 | Hitachi Ltd | Rotating electric machine |
| WO2013107127A1 (en) * | 2012-01-22 | 2013-07-25 | 浙江大学 | Segmented permanent-magnet synchronized motor rotor structure |
| JP2014166016A (en) * | 2013-02-25 | 2014-09-08 | Hitachi Appliances Inc | Permanent magnet synchronous machine and compressor using the same |
| JP2020167792A (en) * | 2019-03-28 | 2020-10-08 | ダイキン工業株式会社 | Stator and motor with this stator |
| CN214626550U (en) * | 2021-01-12 | 2021-11-05 | 江苏海能动力科技有限公司 | Novel split-phase permanent magnet synchronous servo motor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4752707A (en) | Three-phase, one-third pitch motor | |
| US9236784B2 (en) | Flux-switching electric machine | |
| WO2015104893A1 (en) | Axial gap type motor | |
| US9362786B2 (en) | Poly-phase reluctance electric motor with transverse magnetic flux | |
| CN106067720B (en) | A kind of fault-tolerant permanent-magnetic cylindrical linear motor of low-loss semi-closed port groove profile and its processing method | |
| CN112186921A (en) | Rotor for asynchronous starting permanent magnet motor and asynchronous starting permanent magnet motor | |
| CN108964388B (en) | Switched reluctance motor | |
| CN111277092B (en) | A Stator Modular Double Rotor Alternating Pole Permanent Magnet Motor | |
| JP2022519096A (en) | Axial flux electrical machinery | |
| US4847982A (en) | Method of winding a three-phase, one-third pitch motor | |
| CN208674969U (en) | Motor stator and motor | |
| CN111245187B (en) | A toroidal winding dual rotor flux reversal motor | |
| US12231012B2 (en) | Axial flux electrical machine | |
| US20070138896A1 (en) | Outer magnetic circuit bias magnetic bias reluctance machine with permanent magnets | |
| CN109038871B (en) | Switched reluctance motor with segmented rotor | |
| CN111082622A (en) | Decoupling type birotor alternating pole permanent magnet motor | |
| CN214626550U (en) | Novel split-phase permanent magnet synchronous servo motor | |
| US10559987B2 (en) | Electromagnetic armature for rotating electrical machine and method for manufacturing same | |
| CN111181339A (en) | A Stator Modular Double Rotor Double Convex Permanent Magnet Motor | |
| JP2003153472A (en) | Electric rotating machine and electromagnetic apparatus | |
| CN111162614A (en) | Stator modularized hybrid dual-rotor motor | |
| CN113300558B (en) | Double concentrated winding permanent magnet synchronous motor | |
| CN214799085U (en) | Novel split-phase stacked motor rotor | |
| CN112769265A (en) | Novel split-phase permanent magnet synchronous servo motor | |
| JP7001483B2 (en) | Axial gap type transverse flux type rotary electric machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |