CN112737175A - Compact type slotless permanent magnet spindle motor - Google Patents
Compact type slotless permanent magnet spindle motor Download PDFInfo
- Publication number
- CN112737175A CN112737175A CN202011608123.5A CN202011608123A CN112737175A CN 112737175 A CN112737175 A CN 112737175A CN 202011608123 A CN202011608123 A CN 202011608123A CN 112737175 A CN112737175 A CN 112737175A
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- Prior art keywords
- pole
- magnetic pole
- winding
- main magnetic
- permanent magnet
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/21—Devices for sensing speed or position, or actuated thereby
- H02K11/215—Magnetic effect devices, e.g. Hall-effect or magneto-resistive elements
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- 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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/46—Fastening of windings on the stator or rotor structure
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
Abstract
The invention relates to a compact type slotless permanent magnet spindle motor, which comprises a rotating shaft, a stator iron core, a winding and a Hall phase-changing device, wherein the winding is arranged in the stator iron core and consists of 3P-3 coils, P is the number of pole pairs of the motor, insulation encapsulation is arranged around the winding, a main magnetic pole and an auxiliary magnetic pole are arranged on the rotating shaft, the main magnetic pole and the auxiliary magnetic pole are distributed at intervals in a ring shape, the N pole and the S pole of the main magnetic pole are distributed in a staggered way, the magnetizing directions of the auxiliary magnetic pole at the two sides of the N pole of the main magnetic pole are towards the N pole, the magnetizing directions at the two sides of the S pole of the main magnetic pole are opposite to the S pole, and the Hall phase-changing device is. The invention adopts the winding formed by 3P-3 alternating current coils, the rotor adopts the magnetic gathering structure formed by the main magnetic pole and the auxiliary magnetic pole, the area from the inside of the stator core to the air gap meets the design requirements of the turns and the wire diameter of the alternating current coils, and the invention has the characteristics of high power-volume ratio, high speed stabilizing precision, small torque fluctuation, large overload capacity and the like.
Description
Technical Field
The invention relates to the technical field of motors, in particular to a compact type slotless permanent magnet spindle motor.
Background
At present, permanent magnet spindle motors applied to numerical control machines are basically slotted permanent magnet motors, and the common problems of the permanent magnet spindle motors are that the permanent magnet spindle motors have the defects of cogging effect, hysteresis loss, magnetic saturation and the like. The traditional method for weakening the cogging adopts a helical tooth structure, so that the processing difficulty is improved, and the cost is higher; the existing hollow cup slotless motor adopts cylindrical winding, has quite complex process and cannot be made into a large-base motor; in addition, the Hall phase-changing device in the traditional spindle motor is arranged on the side surface of the motor, and a section of the rotor extends out to install a Hall permanent magnet, so that the axial length of the spindle motor is increased.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: in order to overcome the defects in the prior art, the invention provides a compact type slotless permanent magnet spindle motor which is suitable for a precise numerical control machine tool.
The technical scheme adopted by the invention for solving the technical problems is as follows: a compact type slotless permanent magnet spindle motor comprises a rotating shaft, a stator core, a winding and a Hall phase-changing device, wherein the winding is installed in the stator core and is composed of 3P-3 coils, P is the number of pole pairs of the motor, insulation encapsulation is arranged around the winding, a main magnetic pole and an auxiliary magnetic pole are installed on the rotating shaft, the main magnetic pole and the auxiliary magnetic pole are distributed at intervals in a ring shape, N poles and S poles of the main magnetic pole are distributed in a staggered mode, the magnetizing directions of the auxiliary magnetic pole at two sides of the N pole of the main magnetic pole are towards the N pole, and the magnetizing directions at two sides of the S pole of the main magnetic pole are opposite to the S pole, and the Hall phase-changing device is installed inside the stator core.
Preferably, the winding adopts a distributed single-layer winding structure and is arranged on the stator core through a winding framework.
Furthermore, the number of the main magnetic poles and the number of the auxiliary magnetic poles are 2P, and the main magnetic poles and the auxiliary magnetic poles are adhered to the rotating shaft and are bound by adopting non-weft tape gluing.
In order to further reduce the installation space, three Hall phase-changing devices which are arranged in the stator core in a pairwise manner and have an electrical angle of 60 degrees in the circumferential direction are installed in the stator core.
The invention has the beneficial effects that: the invention
Drawings
The invention is further illustrated with reference to the following figures and examples.
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a left side view of fig. 1.
Fig. 3 is a schematic cross-sectional structure diagram according to a first embodiment of the present invention.
Fig. 4 is a schematic cross-sectional structure diagram of a second embodiment of the present invention.
Fig. 5 is a schematic view of the magnetizing method of the rotor permanent magnet according to the present invention.
In the figure: 1. the magnetic pole comprises a rotating shaft, 2 main magnetic poles, 3 auxiliary magnetic poles, 4 stator iron cores, 5 windings, 6 insulating encapsulation and 7 Hall phase-changing devices.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.
As shown in fig. 1 and 2, the compact type slotless permanent magnet spindle motor comprises a rotating shaft 1, a stator core 4, windings 5, an insulating encapsulation 6 and a hall commutation device 7, wherein the end parts of the windings 5 are shaped on two sides of the end parts of the stator core 4 by a shaping tool, the windings 5 adopt a distributed single-layer winding structure and are arranged on the stator core 4 through a winding framework made of insulating materials, the winding framework adopts a 6P-6 slot structure, the windings 5 are composed of 3P-3 coils, and P is the number of pole pairs of the motor.
The rotor is arranged on the rotating shaft 1 and comprises 2P main magnetic poles 2 and 2P auxiliary magnetic poles 3, and the main magnetic poles 2 and the auxiliary magnetic poles 3 are bonded on the rotating shaft 1 and are bound by adopting a weftless tape for gluing; the main magnetic pole 2 and the auxiliary magnetic pole 3 are distributed at intervals in a ring shape, wherein the N pole and the S pole of the main magnetic pole 2 are distributed in a staggered mode in the circumferential direction, the magnetizing directions of the auxiliary magnetic pole 3 on the two sides of the N pole of the main magnetic pole 2 are towards the N pole, the magnetizing directions on the two sides of the S pole of the main magnetic pole 2 are opposite to the S pole, the magnetizing mode is shown in figure 5, the arrow in the figure indicates the magnetic pole direction, and the arrow points to the N pole, so that a magnetism gathering structure can be formed to increase the rated torque of the motor, and the power density ratio is improved.
The three Hall phase-changing devices 7 are arranged in the stator core 4 at intervals of 60 electrical degrees in the circumferential direction, and a Hall circuit board of the Hall phase-changing devices 7 is positioned and arranged on the insulating encapsulation 6 through two screws.
The first embodiment is as follows: as shown in fig. 3, the rotor has a six-pair-pole structure, and includes twelve fan-shaped main magnetic poles and twelve rectangular auxiliary magnetic poles, the winding 5 formed by fifteen coils is decomposed into five sets of space phase structures with a mechanical angle of 60 degrees by a slot potential star diagram, the coils with an electrical angle of 360 degrees are connected in series to form a three-phase winding 5, and six outgoing lines of the three-phase winding 5 are suitable for star or angle connection.
Example two: as shown in fig. 4, the rotor has a nine-pair-pole structure, and includes eighteen fan-shaped main magnetic poles and eighteen rectangular auxiliary magnetic poles, the winding 5 formed by twenty-four coils is decomposed into eight sets of space phase structures with a mechanical angle of 60 degrees by a slot potential star diagram, the phase difference is 360 degrees, the coils are connected in series to form a three-phase winding 5, and six outgoing lines of the three-phase winding 5 are suitable for star or angle connection.
Further, the embodiment of the invention can be expanded to a rotor P antipole, and the winding 5 has 3P-3 coil structures.
The traditional motor usually comprises 3P coils to form a winding 5, three coils are removed to install a Hall phase-changing device 7, and the axial length of a stator and a rotor of the motor is shortened; meanwhile, the three Hall phase change devices 7 are separated by 60 electrical angles in the circumferential direction, but not separated by 120 electrical angles of the traditional motor, so that the volume of the Hall phase change devices 7 is reduced.
The invention adopts an annular stator core, the inside of the stator core is wound with a winding consisting of 3P-3 alternating current coils, the turns of each coil are equal, the rotor adopts an auxiliary magnetic pole magnetism gathering structure, the rated torque of the motor is improved, the area from the inside of the stator core to an air gap meets the design requirements of the turns and the wire diameter of the alternating current coils, the defects of tooth space effect, hysteresis loss, magnetic saturation and the like are avoided, the power-to-volume ratio is high, the speed stabilization precision is high, the torque fluctuation is small, the overload capacity is large, and the manufacturing process is simple.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (4)
1. The utility model provides a compact slotless permanent magnet spindle motor, includes pivot (1), stator core (4), winding (5) and hall commutation device (7), and winding (4) are installed in stator core (4), are equipped with insulating embedment (6), characterized by around winding (5): the winding (5) is composed of 3P-3 coils, P is the number of pole pairs of a motor, a main magnetic pole (2) and an auxiliary magnetic pole (3) are installed on the rotating shaft (1), the main magnetic pole (2) and the auxiliary magnetic pole (3) are distributed at intervals in an annular mode, the N pole and the S pole of the main magnetic pole (2) are distributed in a staggered mode, the auxiliary magnetic pole (3) faces the N pole in the magnetizing direction of the two sides of the N pole of the main magnetic pole (2), the magnetizing direction of the two sides of the S pole of the main magnetic pole (2) is the S pole in the opposite direction, and the Hall phase-changing device (7) is installed inside the stator core (4).
2. The compact slotless permanent magnet spindle motor of claim 1 in which: the winding (5) is of a distributed single-layer winding structure and is arranged on the stator iron core (4) through a winding framework.
3. The compact slotless permanent magnet spindle motor of claim 2 in which: the number of the main magnetic poles (2) and the number of the auxiliary magnetic poles (3) are 2P, and the main magnetic poles (2) and the auxiliary magnetic poles (3) are bonded on the rotating shaft (1) and are bound by adopting a weftless tape for gluing.
4. The compact slotless permanent magnet spindle motor of claim 1 in which: and three Hall phase-changing devices (7) which are arranged in the stator core (4) at intervals of 60 electrical degrees in the circumferential direction are arranged in the stator core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011608123.5A CN112737175A (en) | 2020-12-30 | 2020-12-30 | Compact type slotless permanent magnet spindle motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011608123.5A CN112737175A (en) | 2020-12-30 | 2020-12-30 | Compact type slotless permanent magnet spindle motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112737175A true CN112737175A (en) | 2021-04-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011608123.5A Pending CN112737175A (en) | 2020-12-30 | 2020-12-30 | Compact type slotless permanent magnet spindle motor |
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| CN (1) | CN112737175A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111711301A (en) * | 2020-07-06 | 2020-09-25 | 江阴市航勤特种电机有限公司 | Winding structure of multiphase rectifier type DC generator |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105634235A (en) * | 2015-12-29 | 2016-06-01 | 赵浩 | Shaft sleeve generator capable of simultaneously measuring rotating angular speed and angular acceleration |
| JP3207986U (en) * | 2015-09-30 | 2016-12-15 | ジョンソン エレクトリック ソシエテ アノニム | Single-phase permanent magnet motor and drive mechanism |
| CN108282065A (en) * | 2018-01-26 | 2018-07-13 | 西北工业大学 | High efficiency, high power density Halbach array brshless DC motor |
| CN110380534A (en) * | 2019-06-27 | 2019-10-25 | 北京理工大学 | A kind of low inertia high torque density joint of robot torque motor |
| CN111884385A (en) * | 2020-07-15 | 2020-11-03 | 杭州精导智能科技有限公司 | Hollow cup brushless DC motor |
-
2020
- 2020-12-30 CN CN202011608123.5A patent/CN112737175A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3207986U (en) * | 2015-09-30 | 2016-12-15 | ジョンソン エレクトリック ソシエテ アノニム | Single-phase permanent magnet motor and drive mechanism |
| CN105634235A (en) * | 2015-12-29 | 2016-06-01 | 赵浩 | Shaft sleeve generator capable of simultaneously measuring rotating angular speed and angular acceleration |
| CN108282065A (en) * | 2018-01-26 | 2018-07-13 | 西北工业大学 | High efficiency, high power density Halbach array brshless DC motor |
| CN110380534A (en) * | 2019-06-27 | 2019-10-25 | 北京理工大学 | A kind of low inertia high torque density joint of robot torque motor |
| CN111884385A (en) * | 2020-07-15 | 2020-11-03 | 杭州精导智能科技有限公司 | Hollow cup brushless DC motor |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111711301A (en) * | 2020-07-06 | 2020-09-25 | 江阴市航勤特种电机有限公司 | Winding structure of multiphase rectifier type DC generator |
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Application publication date: 20210430 |