CN217935252U - Brushless synchronous motor - Google Patents
Brushless synchronous motor Download PDFInfo
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- CN217935252U CN217935252U CN202221827258.5U CN202221827258U CN217935252U CN 217935252 U CN217935252 U CN 217935252U CN 202221827258 U CN202221827258 U CN 202221827258U CN 217935252 U CN217935252 U CN 217935252U
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Abstract
The utility model provides a brushless synchronous motor, include: the lower end cover is arranged below the shell, a third annular table is arranged on the lower end cover, a bearing is arranged in the third annular table, the bearing is connected with the lower end of the base body, a rotating shaft is arranged at the upper end of the base body, an upper end cover is arranged above the shell, and the rotating shaft penetrates through the upper end cover; the outer side wall of the base body is sleeved with stator silicon steel, and a winding is wound on the stator silicon steel. The utility model discloses a brushless synchronous motor need not use the preparation of tombarthite material, realizes the purpose that the cost of manufacture reduces. And, the brushless synchronous motor formed by using the base, the stator silicon steel and the housing can achieve the objects of small volume, high energy density, low failure rate and low-speed mechanical vibration, in which the volume size can be reduced by at least 40% compared to the existing motor.
Description
Technical Field
The utility model relates to the technical field of electric machines, in particular to brushless synchronous machine.
Background
At present, brushless synchronous motors are widely applied in the field of motors, the brushless synchronous motors are acknowledged in the industry due to high efficiency, high torque and small volume, the permanent magnet synchronous motors and the switched reluctance motors in the field also become the classic design of the brushless synchronous motors, but the permanent magnet synchronous motors are relatively high in cost due to the fact that rare earth materials with relatively small reserves are used; there is therefore a lack of a motor that can solve the above-mentioned existing problems.
SUMMERY OF THE UTILITY MODEL
The utility model provides a brushless synchronous motor for solve the higher condition of permanent-magnet machine cost among the prior art.
The utility model provides a brushless synchronous motor, include: the lower end cover is arranged below the shell, a third annular table is arranged on the lower end cover, a bearing is arranged in the third annular table, the bearing is connected with the lower end of the base body, a rotating shaft is arranged at the upper end of the base body, an upper end cover is arranged above the shell, and the rotating shaft penetrates through the upper end cover; the outer side wall of the base body is sleeved with stator silicon steel, and a winding is wound on the stator silicon steel.
Preferably, the stator silicon steel is of a cylindrical structure, a second notch is formed in the center of the cylindrical structure, and a base body is sleeved in the second notch in a matched mode; the inner wall equipartition of second notch has a plurality of first notches, the circumference outer wall equipartition of base member has a plurality of fifth notches.
Preferably, the first notch is a T-shaped notch, and the number ratio of the fifth notch to the first notch is 1:3; the upper end cover and the lower end cover are respectively connected with the two ends of the shell into a whole through screws.
Preferably, a plurality of magnetic blocks are uniformly distributed on the circumferential outer wall of the base body, and each magnetic block is arranged between every two adjacent fifth notches; the magnetic blocks respectively correspond to the opening ends of a group of first notches in the stator silicon steel one by one; the fifth notch is an inclined groove or a straight groove; and a raised column matched with the bearing is arranged below the base body.
Preferably, the windings comprise a first winding, a second winding and a third winding, the first winding, the second winding and the third winding are respectively wound on the stator silicon steel by taking three first notches as a group,
and the first winding, the second winding and the third winding are uniformly distributed in a first notch of the stator silicon steel from outside to inside.
The utility model provides a brushless synchronous motor, include: the lower part of the shell is connected with a base body, an inner rotor column is arranged at the center of one surface of the base body, which is close to the shell, and an inner rotor groove is formed in the inner rotor column; the outer wall of the inner rotor column is provided with a bearing; the base member with still be provided with stator silicon steel between the shell, the last winding that winds of stator silicon steel, stator silicon steel with a plurality of magnetic conduction pieces have the equipartition between the shell inner wall.
Preferably, a first annular table and a second annular table are respectively arranged on one surface of the base body close to the shell at intervals, and the first annular table and the second annular table are concentrically arranged; a bearing is arranged between the first annular table and the inner rotor column, and a plurality of sixth notches are formed in the upper surface of the shell at intervals.
Preferably, a plurality of assembling holes are uniformly distributed on the upper surface of the stator silicon steel, a plurality of screw holes are uniformly distributed above the second annular table, and the screw holes are matched with the assembling holes one by one; one surface of the magnetic conductive sheet close to the shell is bonded with the inner wall of the shell.
Preferably, the stator silicon steel is the cylindricality structure, the center of cylindricality structure is equipped with the third notch that runs through, stator silicon steel's circumference outer wall equipartition has the fourth notch of a plurality of T type structures, the fourth notch is used for around establishing the winding.
Preferably, the number ratio of the magnetic conductive sheets to the fourth notch is as follows: 1; the winding includes first winding, second winding and third winding, first winding, the second winding with the third winding uses three fourth notch to establish as a set of winding respectively on the stator silicon steel, just first winding, second winding and third winding outside-in's equipartition is in the fourth notch of stator silicon steel.
The utility model discloses a theory of operation and beneficial effect as follows:
the motor technology of the present invention structurally provides two types of brushless synchronous motors, including an outer rotor brushless synchronous motor and an inner rotor brushless synchronous motor, and the structure of the motor is designed differently according to the connection mode of inward rotation and outward rotation, so that the motor can meet different usage scenarios;
and simultaneously, the utility model discloses a brushless synchronous motor need not use the preparation of tombarthite material, realizes the purpose that the cost of manufacture reduces.
And, the brushless synchronous motor formed by using the base, the stator silicon steel and the case can achieve the objects of small volume, high energy density, low failure rate and low-speed mechanical vibration, in which the volume size can be reduced by at least 40% compared to the existing motor.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.
The technical solution of the present invention is further described in detail by the accompanying drawings and examples.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the principles of the invention. In the drawings:
fig. 1 is a schematic structural view of an inner rotor switched reluctance motor of the present invention;
fig. 2 is a schematic view of the cross-sectional structure of the inner rotor switched reluctance motor of the present invention;
fig. 3 is a schematic diagram of the structure of the three-phase winding of the inner rotor switched reluctance motor of the present invention;
fig. 4 is a schematic diagram of the relationship between the number and the angular position of one phase winding and the rotor slot of the inner rotor switched reluctance motor of the present invention;
fig. 5 is a schematic view of an inner rotor structure of the inner rotor switched reluctance motor of the present invention;
fig. 6 is a schematic structural view of the stator of the inner rotor switched reluctance motor of the present invention;
fig. 7 is a schematic view of a three-dimensional structure of a rotor of the inner rotor switched reluctance motor of the present invention;
fig. 8 is a schematic structural view of a rotor with magnets of an inner rotor switched reluctance motor according to the present invention;
fig. 9 is a schematic view of a rotor chute structure of the inner rotor switched reluctance motor of the present invention
Fig. 10 is a schematic view of a connection structure of a rotor and a stator with magnets of the inner rotor switched reluctance motor according to the present invention;
fig. 11 is a schematic structural view of the outer rotor switched reluctance motor of the present invention;
fig. 12 is a schematic view of a cross-sectional structure of the outer rotor switched reluctance motor of the present invention;
fig. 13 is a schematic diagram of a three-phase winding structure of the outer rotor switched reluctance motor of the present invention;
fig. 14 is a schematic diagram illustrating the relationship between the number and the angular positions of the magnetic conductive material patches or the magnet patches on the winding and the outer rotor of the outer rotor switched reluctance motor according to the present invention;
fig. 15 is a schematic view of a stator structure of an outer rotor switched reluctance motor according to the present invention;
fig. 16 is a schematic structural view of a magnet or magnetic block of an outer rotor switched reluctance motor according to the present invention;
fig. 17 is a schematic view of the structure of the guide ring according to the present invention.
Wherein, 1-rotating shaft, 2-winding, 3-shell, 4-stator silicon steel, 5-lower end cover, 6-fifth notch, 7-base, 8-bearing, 9-upper end cover, 10-first notch, 11-second notch, 12-magnet, 13-convex column,
14-inner rotor slot, 15-magnetic conductive sheet, 16-first annular table, 17-second annular table, 18-third notch, 19-fourth notch, 20-third annular table, 21-fourth annular table, 22-assembly hole, 23-screw hole, 24-sixth notch, 25-guide ring, 26-wear-resistant ring, 2A-first winding, 2B-second winding and 2C-third winding.
Detailed Description
The preferred embodiments of the present invention will be described hereinafter with reference to the accompanying drawings, and it should be understood that the preferred embodiments described herein are merely for purposes of illustration and explanation, and are not intended to limit the present invention.
According to fig. 1-10, an embodiment of the present invention provides a brushless synchronous motor, specifically an inner rotor switched reluctance motor, comprising: the device comprises a shell 3, wherein a lower end cover 5 is arranged below the shell 3, a third annular table 20 is arranged on the lower end cover 5, a bearing 8 is arranged in the third annular table 20, the bearing 8 is connected with the lower end of a base body 7, a rotating shaft 1 is arranged at the upper end of the base body 7, an upper end cover 9 is arranged above the shell 3, and the rotating shaft 1 penetrates through the upper end cover 9; the lateral wall cover of base member 7 is equipped with stator silicon steel 4, the winding 2 is equipped with on the stator silicon steel 4.
The stator silicon steel 4 is of a cylindrical structure, a second notch 11 is formed in the center of the cylindrical structure, and the base body 7 is sleeved in the second notch 11 in a matched mode; the inner wall equipartition of second notch 11 has a plurality of first notches 10, the circumference outer wall equipartition of base member 7 has a plurality of fifth notches 6.
The first notch 10 is a T-shaped notch, and the number ratio of the fifth notch 6 to the first notch 10 is 1:3; the upper end cover 9 and the lower end cover 5 are respectively connected with the two ends of the shell 3 into a whole through screws.
A plurality of magnetic blocks 12 are uniformly distributed on the circumferential outer wall of the base body 7, and each magnetic block 12 is arranged between every two adjacent fifth notches 6; and each magnetic block 12 respectively corresponds to the opening end of a group of first notches 10 on the stator silicon steel 4 one by one; the fifth notch 6 is a chute or a straight groove; and a raised column 13 matched with the bearing 8 is arranged below the base body 7.
The winding 2 comprises a first winding 2A, a second winding 2B and a third winding 2C, the first winding 2A, the second winding 2B and the third winding 2C are respectively wound on the stator silicon steel 4 by taking three first notches 10 as a group, and the first winding 2A, the second winding 2B and the third winding 2C are uniformly distributed in the first notches 10 of the stator silicon steel 4 from outside to inside.
According to fig. 17, a guide ring 25 with an annular structure is further arranged on the upper end cover 9, a wear-resistant ring 26 is arranged on the inner wall of the guide ring 25, and the center of the wear-resistant ring 26 is used for the rotating shaft 1 to pass through.
Specifically, the utility model discloses in, the one side that upper end cover 9 is close to shell 3 is equipped with fourth annular platform 21, fourth annular platform 21 is used for mutually supporting with bearing 8 to be used for connecting pivot 1. The stator silicon steel 4 forms a stator which is a three-phase winding 2, each phase of winding 2 is wound in the same phase or each phase of winding 2 is wound in the opposite phase, each phase of the three-phase winding 2 is staggered with a first notch 10 in sequence, and the first notches 10 are stator silicon steel 4T grooves with T-shaped structures;
the number of the sub-windings 2 of each phase of winding 2 is 1/3 of the number of the stator silicon steel 4T slots, the number of the sub-windings 2 of each phase of winding 2 is equal to the number of the fifth notches 6, the fifth notches 6 are rotor slots, and the interval angle of each sub-winding 2 is equal to the interval angle of the rotor slots.
Where, in fig. 4, α = the angle between the sectors of two adjacent stator T slots.
Each sub-winding 2 in each phase is wound across two first notches 10, namely, each sub-winding 2 surrounds two stator silicon steel 4T-shaped grooves to form a closed structure; the expression of in-phase or anti-phase means that in any phase winding 2, the in-phase is that all the partial windings 2 are wound in the same direction, namely the closed coils are wound in the same direction, and the anti-phase is that the winding directions of two adjacent partial windings 2 are opposite;
the rotating shaft 1 and the base 7 form a rotor, and the rotor can be formed by processing a fifth notch 6 through silicon steel laminations; the fifth notch 6 is a rotor silicon steel slot, the number of the rotor silicon steel slots is 1/3 of that of the stator silicon steel 4T slots, and the number of the rotor silicon steel slots is more than or equal to 2; for example, the number of the rotor silicon steel slots is 6, and the number of the stator silicon steel slots is 4T is 18.
Alternatively, the rotor may be formed integrally with a tube of a high permeability material such as a solid block of high carbon steel, silicon steel, or a bar material to form a structure with an elongated slot.
Or the rotor can also be designed with magnets, and any two adjacent magnets NS are arranged outside the rotor in a staggered bipolar uniform manner, wherein the number of the magnets on the rotor is 1/3 of the number of the stator silicon steel 4T slots, and the number of the magnets on the rotor is more than or equal to 2;
the rotor silicon steel groove or the structure with the long groove formed by the integrated processing can be a vertical groove or a chute with a certain angle; the chute with a proper angle can further reduce the cogging effect during starting and mechanical vibration, so that the motor is started more smoothly, the low-speed mechanical vibration is smaller, and the angles of the chute can be all angles matched with the structural design of the motor;
the groove depth of the fifth notch 6 can be a proper depth, and the rotor can be integrally machined and formed and can comprise casting, turning and milling, linear cutting, tempering, surface treatment and the like; the rotor can be assembled many parts installation combination, can contain casting, car and mill, wire-electrode cutting, quenching and tempering, surface treatment and equipment, and the rotor also can be silicon steel sheet lamination formula machine-shaping, and the silicon steel after the shaping is connected as an organic wholely with pivot 1.
In the utility model, the three-phase unidirectional square wave is adopted for driving, the duty ratio is 33 percent, the three-phase is electrified in sequence, the rotating speed and the torque of the motor are adjusted by controlling the frequency of the square wave, the input voltage and the input current, wherein the square wave can be optimized into a triangular wave or a half sine wave; when the motor is started, one phase in the three-phase control circuit is electrified firstly, then an adjacent phase is electrified sequentially, and the electrification sequence of the adjacent phase determines the forward rotation and the reverse rotation of the motor;
compared with the prior art, the switched reluctance motor can greatly reduce the cost by adopting the design of the switched reluctance motor in the invention compared with the existing permanent magnet synchronous motor under the condition of comprehensively considering the application scene;
compared with the existing switched reluctance motor, the switched reluctance motor designed by the invention has the advantages of low cost, small volume, high energy density, simple control, low failure rate and small low-speed mechanical vibration, wherein the volume can be reduced by more than 40%.
In another embodiment, as shown in fig. 11-16, the present invention provides a brushless synchronous machine, in particular an external rotor switched reluctance machine, comprising: the lower part of the shell 3 is connected with a base body 7, an inner rotor column is arranged at the center of the base body 7 close to one surface of the shell 3, and an inner rotor groove 14 is arranged on the inner rotor column; the outer wall of the inner rotor column is provided with a bearing 8; the base member 7 with still be provided with stator silicon steel 4 between the shell 3, the last winding 2 that is equipped with of stator silicon steel 4, stator silicon steel 4 with the equipartition has a plurality of magnetic conduction pieces 15 between the 3 inner walls of shell.
A first annular table 16 and a second annular table 17 are respectively arranged on one surface of the base 7 close to the shell 3 at intervals, and the first annular table 16 and the second annular table 17 are concentrically arranged; a bearing 8 is arranged between the first annular table 16 and the inner rotor column, and a plurality of sixth notches 24 are arranged on the upper surface of the outer shell 3 at intervals.
A plurality of assembling holes 22 are uniformly distributed on the upper surface of the stator silicon steel 4, a plurality of screw holes 23 are uniformly distributed above the second annular table 17, and the screw holes 23 are matched with the assembling holes 22 one by one; one surface of the magnetic conductive sheet 15 close to the shell 3 is bonded with the inner wall of the shell 3.
The number ratio of the magnetic conductive sheets 15 to the fourth notches 19 is as follows: 1; the winding 2 comprises a first winding 2A, a second winding 2B and a third winding 2C, the first winding 2A, the second winding 2B and the third winding 2C are respectively wound on the stator silicon steel 4 by taking three fourth notches 19 as a group, and the first winding 2A, the second winding 2B and the third winding 2C are uniformly distributed in the fourth notches 19 of the stator silicon steel 4 from outside to inside.
Specifically, the utility model discloses in, shell 3 passes through 8 erection connections of bearing with base member 7, and stator silicon steel 4 installation is fixed on base member 7, and 15 rubber coatings of magnetic conduction piece are pasted on the inner wall of shell 3, and 2 coiling of winding are on stator silicon steel 4. The winding 2 is a three-phase winding 2, and the winding 2 can be wound in the same phase or in opposite phase;
the magnetic conductive sheet 15 is a high magnetic conductive material block or a magnet; the number of the magnetic conductive sheets 15 is 12, the fourth notch 19 is a stator T slot, the number of the stator T slots is 36, and the number ratio of the magnetic conductive sheets 15 to the stator slots is 1.
The stator silicon steel 4 and the winding 2 form a stator, the stator adopts a three-phase winding 2, each phase of winding 2 is wound in the same phase or each phase of winding 2 is wound in the opposite phase, wherein each phase of the three-phase winding 2 is staggered with a fourth notch 19 in turn, and the fourth notch 19 is a stator silicon steel 4T groove; the number of the sub-windings 2 of each phase of winding 2 is 1/3 of the number of the stator silicon steel 4T slots, the number of the sub-windings 2 of each phase of winding 2 is equal to the number of the rotor slots, the interval angle of each sub-winding 2 is equal to the interval angle of the rotor slots, and the rotor slots are gaps among the magnetic conductive sheets 15. Where, in fig. 14, α = the angle between the sectors of two adjacent stator T slots.
Wherein, every partial winding 2 strides two grooves to wind for in every phase: each sub-winding 2 surrounds two stator silicon steel 4T slots to form a closed structure; the in-phase or anti-phase is: in any phase winding 2, the same phase is that all the sub-windings 2, namely the closed coils, are wound in the same direction, and the opposite phase is that the winding directions of two adjacent sub-windings 2 are opposite;
in the utility model, the three-phase unidirectional square wave is adopted for driving, the duty ratio is 33 percent, the three-phase is electrified in sequence, the rotating speed and the torque of the motor are adjusted by controlling the frequency of the square wave, the input voltage and the input current, wherein the square wave can be optimized into a triangular wave or a half sine wave; when the motor is started, one phase in the three-phase control circuit is electrified firstly, then the adjacent phase is electrified in the same position, and the electrification sequence of the adjacent phase determines the positive rotation and the reverse rotation of the motor;
compared with the prior art, the switched reluctance motor can greatly reduce the cost by adopting the design of the switched reluctance motor in the invention compared with the existing permanent magnet synchronous motor under the condition of comprehensively considering the application scene;
compared with the existing switched reluctance motor, the switched reluctance motor designed by the invention has the advantages of low cost, small volume, high energy density, simple control, low failure rate and small low-speed mechanical vibration, wherein the volume can be reduced by more than 40%.
It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A brushless synchronous motor, comprising: the lower end cover is arranged below the shell, a third annular table is arranged on the lower end cover, a bearing is arranged in the third annular table and is connected with the lower end of the base body, a rotating shaft is arranged at the upper end of the base body, an upper end cover is arranged above the shell, and the rotating shaft penetrates through the upper end cover;
the outer side wall of the base body is sleeved with stator silicon steel, and a winding is wound on the stator silicon steel.
2. A brushless synchronous machine according to claim 1, wherein the stator silicon steel is a cylindrical structure, a second notch is formed in the center of the cylindrical structure, and the second notch is used for being matched with and sleeved on the base body;
the inner wall equipartition of second notch has a plurality of first notches, the circumference outer wall equipartition of base member has a plurality of fifth notches.
3. A brushless synchronous machine according to claim 2, wherein the first notches are T-shaped notches, and the ratio of the number of the fifth notches to the number of the first notches is 1:3;
the upper end cover and the lower end cover are respectively connected with the two ends of the shell into a whole through screws.
4. A brushless synchronous motor according to claim 2, wherein a plurality of magnetic blocks are uniformly distributed on the circumferential outer wall of the base, and each magnetic block is respectively arranged between two adjacent fifth notches; the magnetic blocks respectively correspond to the opening ends of a group of first notches in the stator silicon steel one by one;
the fifth notch is a chute or a straight groove; and a raised column matched with the bearing is arranged below the base body.
5. A brushless synchronous machine according to claim 1, wherein the windings comprise a first winding, a second winding, and a third winding, the first winding, the second winding, and the third winding are wound around the stator silicon steel in sets of three first notches, respectively,
and the first winding, the second winding and the third winding are uniformly distributed in a first notch of the stator silicon steel from outside to inside.
6. A brushless synchronous motor, comprising: the lower part of the shell is connected with a base body, an inner rotor column is arranged at the center of one surface of the base body, which is close to the shell, and an inner rotor groove is formed in the inner rotor column;
the outer wall of the inner rotor column is provided with a bearing; the base member with still be provided with stator silicon steel between the shell, the last winding that is equipped with of stator silicon steel, stator silicon steel with the equipartition has a plurality of magnetic conduction pieces between the shell inner wall.
7. A brushless synchronous machine as recited in claim 6, wherein a first annular land and a second annular land are respectively provided at a spacing on a side of the base adjacent to the housing, the first annular land and the second annular land being concentrically disposed;
a bearing is arranged between the first annular table and the inner rotor column, and a plurality of sixth notches are formed in the upper surface of the shell at intervals.
8. The brushless synchronous motor of claim 7, wherein a plurality of assembly holes are uniformly distributed on the upper surface of the stator silicon steel, a plurality of screw holes are uniformly distributed above the second annular table, and the screw holes and the assembly holes are matched one by one;
one surface of the magnetic conductive sheet close to the shell is bonded with the inner wall of the shell.
9. A brushless synchronous machine according to claim 6, wherein the stator silicon steel is a cylindrical structure, the center of the cylindrical structure is provided with a third notch therethrough,
the circumference outer wall equipartition of stator silicon steel has the fourth notch of a plurality of T type structures, the fourth notch is used for around establishing the winding.
10. A brushless synchronous machine according to claim 9, wherein the ratio of the number of said flux guide plates to the number of said fourth slots is: 1;
the windings comprise a first winding, a second winding and a third winding, the first winding, the second winding and the third winding are respectively wound on the stator silicon steel by taking three fourth notches as a group,
and the first winding, the second winding and the third winding are uniformly distributed in a fourth notch of the stator silicon steel from outside to inside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221827258.5U CN217935252U (en) | 2022-07-15 | 2022-07-15 | Brushless synchronous motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221827258.5U CN217935252U (en) | 2022-07-15 | 2022-07-15 | Brushless synchronous motor |
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| Publication Number | Publication Date |
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| CN217935252U true CN217935252U (en) | 2022-11-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221827258.5U Active CN217935252U (en) | 2022-07-15 | 2022-07-15 | Brushless synchronous motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217935252U (en) |
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2022
- 2022-07-15 CN CN202221827258.5U patent/CN217935252U/en active Active
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