CN110829771A - Permanent-magnet synchronous motor with seamless armature winding - Google Patents
Permanent-magnet synchronous motor with seamless armature winding Download PDFInfo
- Publication number
- CN110829771A CN110829771A CN201910937805.1A CN201910937805A CN110829771A CN 110829771 A CN110829771 A CN 110829771A CN 201910937805 A CN201910937805 A CN 201910937805A CN 110829771 A CN110829771 A CN 110829771A
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- Prior art keywords
- permanent magnet
- armature winding
- seamless
- synchronous motor
- rotor
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- 238000004804 winding Methods 0.000 title claims abstract description 49
- 230000001360 synchronised effect Effects 0.000 title claims abstract description 24
- 238000003825 pressing Methods 0.000 claims abstract description 8
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 4
- 239000010935 stainless steel Substances 0.000 claims abstract description 4
- 229910000976 Electrical steel Inorganic materials 0.000 claims description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 210000003781 tooth socket Anatomy 0.000 abstract 1
- 238000002788 crimping Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 241000764238 Isis Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000005405 multipole Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
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
- 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
- H02K1/24—Rotor cores with salient poles ; Variable reluctance rotors
-
- 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
- H02K1/278—Surface mounted magnets; Inset magnets
-
- 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)
- Permanent Magnet Type Synchronous Machine (AREA)
Abstract
The invention discloses a permanent magnet synchronous motor with a seamless armature winding, which is characterized in that: the permanent magnet motor comprises a front bearing (1), a front end cover (2), an armature winding (3), a stator core (4), a rotor (5), a rear end cover (6) and a rear bearing (7), wherein the rotor (5) comprises a rear pressing ring (51), a stainless steel sleeve (52), a front pressing ring (53), a permanent magnet magnetic pole (54) and a rotor shaft (55), the permanent magnet magnetic pole (52) is formed by fixedly connecting three sections of magnets along the axial direction of the permanent magnet magnetic pole, and each section of magnet in the three sections of magnets is staggered by a space angle in sequence. The invention realizes the rotor slant pole by the rotor magnetic pole subsection dislocation, effectively eliminates the positioning torque of the tooth socket, and the motor has good waveform sine property and no obvious ripple.
Description
Technical Field
The invention relates to the technical field of motors, in particular to a permanent magnet synchronous motor with a seamless armature winding.
Background
The land, air and water mobile devices all adopt 12-48 (72) V direct current power supplies, need low-voltage driven permanent magnet synchronous motors, and the pursuit of small size, light weight and high power density increases the demand of high-speed motors. The motor with a small base number of 40-60 can achieve a rated torque of 1-2 Nm, the output power of the motor reaches from thousands of watts to hundreds of kilowatts when tens of thousands of revolutions per minute, the winding current reaches hundreds of amperes or even thousands of amperes when low voltage is supplied, the sectional area of the armature winding wire of the motor is quite large, and if the armature coils and the phases are connected in a welding or crimping mode as usual, the realization of the small motor end space is quite complicated.
Disclosure of Invention
Based on the defects of the prior art, the invention aims to provide a permanent magnet synchronous motor with seamless armature windings, which improves the structure of the permanent magnet synchronous motor, improves the performance of the permanent magnet synchronous motor and reduces the cost.
The technical scheme of the invention is as follows:
the seamless armature winding permanent magnet synchronous motor comprises a front bearing 1, a front end cover 2, an armature winding 3, a stator iron core 4, a rotor 5, a rear end cover 6 and a rear bearing 7, wherein the rotor 5 comprises a rear pressing ring 51, a stainless steel sleeve 52, a front pressing ring 53, a permanent magnet magnetic pole 54 and a rotor shaft 55, the permanent magnet magnetic pole 52 is formed by fixedly connecting three sections of magnets along the axial direction of the permanent magnet magnetic pole, and each section of the three sections of magnets is staggered by a space angle in sequence.
Further, the spatial angle of each magnet section in the three magnet sections, which is staggered with the adjacent magnet section, is the same.
Further, the spatial angle of each magnet section in the three magnet sections, which is staggered with the adjacent magnet section, is 11 degrees.
Further, the rotor 5 is a four-pole rotor.
Further, the number of slots of the stator core 4 is 6 slots.
Further, the 6 grooves are formed by surrounding two adjacent teeth, and the width of each notch is smaller than the distance between two adjacent teeth except the notch.
Further, the stator core 4 is made of a silicon steel sheet.
Further, the stator core 4 is made of a silicon steel sheet 0.2 or 0.35 thick.
Furthermore, the armature winding 3 is three-phase, each phase of winding occupies two teeth, the first tooth and the fourth tooth are continuously wound into one phase, and a end a and an end x are led out; the third tooth and the sixth tooth are continuously wound into a phase, and a b end and a y end are led out; the fifth tooth and the second tooth are continuously wound into one phase, and c and z ends are led out, wherein the a end and the z end are combined and connected with the U end of the motor, the b end and the x end are combined and connected with the V end of the motor, and the c end and the y end are combined and connected with the W end of the motor.
The invention has the beneficial effects that: the rotor magnetic poles are staggered in a segmented mode to realize rotor oblique poles, so that the positioning torque of tooth grooves is effectively eliminated, and the motor is good in waveform sine and free of obvious ripples.
Drawings
FIG. 1 is a schematic cross-sectional view of an embodiment of the present invention;
FIG. 2 is a schematic view of a rotor structure according to an embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view of the rotor of FIG. 2 in accordance with the present invention;
fig. 4 is a schematic view of stator winding connection according to an embodiment of the present invention.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the features of the following embodiments and examples may be combined with each other without conflict.
As shown in fig. 1-3, the permanent magnet synchronous motor with seamless armature windings comprises a front bearing 1, a front end cover 2, an armature winding 3, a stator core 4, a rotor 5, a rear end cover 6 and a rear bearing 7, wherein the rotor 5 comprises a rear pressing ring 51, a stainless steel sleeve 52, a front pressing ring 53, a permanent magnet magnetic pole 54 and a rotor shaft 55, the permanent magnet magnetic pole 52 is formed by fixedly connecting three sections of magnets along the axial direction of the permanent magnet magnetic pole, and each section of the three sections of magnets is staggered by a space angle in sequence. The spatial angle of dislocation of each section of magnet and the adjacent magnet in the three sections of magnets is the same, and the spatial angle of dislocation is 11 degrees.
The rotor 5 is a four-pole rotor. For high speed motors, it is not desirable to use multi-pole logarithm in addition to the low loss silicon steel sheet material required to reduce iron losses. The universal servo synchronous motor 4 has the most pole pairs 5, and the high-speed synchronous motor preferably adopts fewer pole pairs. The yoke part of the iron core of the stator and the iron core of the rotor of one pair of poles is relatively thickened, so that the space of an effective tooth layer for electromechanical energy conversion is reduced, and the torque density and the power density are reduced, so that 2 pairs of poles are optimal for a high-speed permanent magnet synchronous motor with a small base number. The three phases have two pairs of extremely minimum slots, meaning the minimum number of coils and the most simplified process, 6 slots. Each phase occupies two teeth, and each tooth has one turn to form two turns of the simplest phase winding in series. Therefore, as shown in fig. 4, the number of slots of the stator core 4 is 6. The 6 grooves are formed by surrounding two adjacent teeth, and the width of each notch is smaller than the distance between two adjacent teeth except the notch. The stator core 4 is made of a silicon steel sheet with a thickness of 0.2 or 0.35.
The armature winding 3 is three-phase, each phase of winding occupies two teeth, the first tooth and the fourth tooth are continuously wound into one phase, and a end a and an end x are led out; the third tooth and the sixth tooth are continuously wound into a phase, and a b end and a y end are led out; the fifth tooth and the second tooth are continuously wound into one phase, and c and z ends are led out, wherein the a end and the z end are combined and connected with the U end of the motor, the b end and the x end are combined and connected with the V end of the motor, and the c end and the y end are combined and connected with the W end of the motor.
The three-phase windings of the permanent magnet synchronous motor are connected by adopting a delta (△). the three-phase windings of the permanent magnet synchronous motor are generally connected by adopting a star (Y) connection method, because the electromotive force fundamental wave phases in the three-phase windings sequentially differ by 120 degrees in electrical angle, the third harmonic is in the same phase, when the three-phase windings are connected into a star, the third harmonic in the line potential is mutually counteracted, when the three-phase windings are connected into a triangle, the three-phase harmonics are superposed in a triangle loop, and large third harmonic circulation and large additional loss and resistance torque are possibly caused, but the winding current and the lead sectional area in the low-voltage high-speed permanent magnet motor are large, and in a narrow end space, both-end welding and crimping are difficult, namely the middle points of the three-phase star connection windings need to be welded or crimped together, so that the triangle connection windings are selected according to the requirement of a seamless armature winding, under the condition of 4-pole 6-slot matching, the pitch Y of the stator winding is a
Namely, it is
Is short to fall
And the third harmonic potential is zero in the short-distance winding with the polar distance angle, and the circulating current of the third harmonic is not generated.
Uniform and symmetrical winding distribution both electrically and spatially. The three-phase winding starts in 1, 2 and 3 slots respectively, the electromotive forces of the phase windings are also different by 120 degrees in electrical angle and are electrically symmetrical, but the distribution of the electromotive forces in the end space is not completely symmetrical and uniform. The invention adopts the starting ends a, b and c of the three-phase winding, which are respectively 1, 3 and 5 slots, so that the three-phase winding is electrically symmetrical and mechanically (spatially) symmetrically and uniformly distributed, and the three-phase winding comprises the uniformly and symmetrically distributed transition lines among the coils of each phase. The ends z, y and x of the phase winding to be merged with the three-phase starting end and led out are respectively arranged in 1, 3 and 5 slots, az, by and cx are naturally merged together to form U, V and W leading out, and a perfect seamless armature winding structure is formed.
The above embodiments are merely representative of the centralized embodiments of the present invention, and the description thereof is specific and detailed, but it should not be understood as the limitation of the scope of the present invention, and it should be noted that those skilled in the art can make various changes and modifications without departing from the spirit of the present invention, and these changes and modifications all fall into the protection scope of the present invention. Therefore, the protection scope of the present patent should be subject to the appended claims.
Claims (9)
1. Seamless armature winding permanent magnet synchronous motor, its characterized in that: the permanent magnet motor comprises a front bearing (1), a front end cover (2), an armature winding (3), a stator core (4), a rotor (5), a rear end cover (6) and a rear bearing (7), wherein the rotor (5) comprises a rear pressing ring (51), a stainless steel sleeve (52), a front pressing ring (53), a permanent magnet magnetic pole (54) and a rotor shaft (55), the permanent magnet magnetic pole (52) is formed by fixedly connecting three sections of magnets along the axial direction of the permanent magnet magnetic pole, and each section of magnet in the three sections of magnets is staggered by a space angle in sequence.
2. The seamless armature winding permanent magnet synchronous motor according to claim 1, wherein: the spatial angle of each section of magnet in the three sections of magnets and the adjacent magnet are staggered to be the same.
3. A seamless armature winding permanent magnet synchronous motor as claimed in claim 2, wherein: the spatial angle of dislocation between each section of magnet and the adjacent magnet in the three sections of magnets is 11 degrees.
4. The seamless armature winding permanent magnet synchronous motor according to claim 1, wherein: the rotor (5) is a four-pole rotor.
5. The seamless armature winding permanent magnet synchronous motor according to claim 1, wherein: the number of the slots of the stator iron core (4) is 6.
6. The seamless armature winding permanent magnet synchronous motor according to claim 5, wherein: the 6 grooves are formed by surrounding two adjacent teeth, and the width of each notch is smaller than the distance between two adjacent teeth except the notch.
7. A seamless armature winding permanent magnet synchronous motor as in claim 6, wherein: the stator core (4) is made of silicon steel sheets.
8. A seamless armature winding permanent magnet synchronous motor as in claim 7 wherein: the stator core (4) is made of silicon steel sheets with the thickness of 0.2 or 0.35.
9. The gapless armature winding permanent magnet synchronous motor according to claim 5 or 6, wherein: the armature winding (3) is three-phase, each phase of winding occupies two teeth, the first tooth and the fourth tooth are continuously wound into one phase, and a end a and an end x are led out; the third tooth and the sixth tooth are continuously wound into a phase, and a b end and a y end are led out; the fifth tooth and the second tooth are continuously wound into one phase, and c and z ends are led out, wherein the a end and the z end are combined and connected with the U end of the motor, the b end and the x end are combined and connected with the V end of the motor, and the c end and the y end are combined and connected with the W end of the motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910937805.1A CN110829771A (en) | 2019-09-30 | 2019-09-30 | Permanent-magnet synchronous motor with seamless armature winding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910937805.1A CN110829771A (en) | 2019-09-30 | 2019-09-30 | Permanent-magnet synchronous motor with seamless armature winding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110829771A true CN110829771A (en) | 2020-02-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910937805.1A Pending CN110829771A (en) | 2019-09-30 | 2019-09-30 | Permanent-magnet synchronous motor with seamless armature winding |
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| Country | Link |
|---|---|
| CN (1) | CN110829771A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090033174A1 (en) * | 2007-07-30 | 2009-02-05 | Jtekt Corporation | Brushless motor |
| CN201893676U (en) * | 2010-11-25 | 2011-07-06 | 江苏超力电器有限公司 | Automobile electric power steering (EPS) permanent magnet brushless direct current motor |
| CN202737714U (en) * | 2012-06-06 | 2013-02-13 | 春城控股集团有限公司 | Brushless permanent magnetism direct current motor with sectional offset high speed rotor magnetic pole |
| CN103457377A (en) * | 2013-09-03 | 2013-12-18 | 蒂森克虏伯电梯（上海）有限公司 | Packaging structure of skewing permanent magnet motor |
| CN105703505A (en) * | 2014-12-16 | 2016-06-22 | 西门子公司 | Permanently magnetically excited electric machine |
| CN206004437U (en) * | 2016-09-27 | 2017-03-08 | 深圳市航天电机系统有限公司 | Permanent magnet machine rotor and magneto |
| CN210780481U (en) * | 2019-09-30 | 2020-06-16 | 珠海运控电机有限公司 | Permanent-magnet synchronous motor with seamless armature winding |
-
2019
- 2019-09-30 CN CN201910937805.1A patent/CN110829771A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090033174A1 (en) * | 2007-07-30 | 2009-02-05 | Jtekt Corporation | Brushless motor |
| CN201893676U (en) * | 2010-11-25 | 2011-07-06 | 江苏超力电器有限公司 | Automobile electric power steering (EPS) permanent magnet brushless direct current motor |
| CN202737714U (en) * | 2012-06-06 | 2013-02-13 | 春城控股集团有限公司 | Brushless permanent magnetism direct current motor with sectional offset high speed rotor magnetic pole |
| CN103457377A (en) * | 2013-09-03 | 2013-12-18 | 蒂森克虏伯电梯（上海）有限公司 | Packaging structure of skewing permanent magnet motor |
| CN105703505A (en) * | 2014-12-16 | 2016-06-22 | 西门子公司 | Permanently magnetically excited electric machine |
| CN206004437U (en) * | 2016-09-27 | 2017-03-08 | 深圳市航天电机系统有限公司 | Permanent magnet machine rotor and magneto |
| CN210780481U (en) * | 2019-09-30 | 2020-06-16 | 珠海运控电机有限公司 | Permanent-magnet synchronous motor with seamless armature winding |
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