CN215378586U - Stator with minimum unit motor, outer rotor motor and inner rotor motor - Google Patents
Stator with minimum unit motor, outer rotor motor and inner rotor motor Download PDFInfo
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- CN215378586U CN215378586U CN202121328362.5U CN202121328362U CN215378586U CN 215378586 U CN215378586 U CN 215378586U CN 202121328362 U CN202121328362 U CN 202121328362U CN 215378586 U CN215378586 U CN 215378586U
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Abstract
The utility model provides a stator with a minimum unit motor, an outer rotor motor and an inner rotor motor, wherein the stator comprises a stator core, a conductive end ring and n direct-insertion slot conductors which are axially arranged on the stator core in a penetrating way, and n is an integral multiple of the phase number m; one end of the direct plug-in type slot conductor is detachably arranged on the conductive end ring and is in short circuit with other direct plug-in type slot conductors through the conductive end ring; every m direct-insert slot conductors are provided with different electric phases by a power supply device to form a minimum unit motor; the utility model can arrange more rotor magnetic poles and is more suitable for direct-drive low-speed and high-torque application.
Description
Technical Field
The utility model relates to the technical field of motors, in particular to a stator with a minimum unit motor, an outer rotor motor and an inner rotor motor.
Background
In the winding structure of the motor, only one section of the winding placed in the slot can directly influence the output power of the motor, so that the effective length of the winding is called. In order to form a loop, a loop winding is required to be arranged in a winding structure of a traditional motor, the loop winding is usually required to be arranged across slots, and accordingly an overlong end winding is arranged on the motor, the invalid length of the motor winding can be increased and can even exceed the effective length, and a plurality of defects of the overlong end winding exist. And a common method for solving the problem of overlong end parts adopts a ring winding, but the ring winding has a back winding which has no effect on the internal magnetic field of the motor, so that the back winding is also the invalid length of the motor winding, and the utilization rate of the winding of the structure is obviously reduced. When the motor winding breaks down, because the air gap space is little, need extract the rotor usually, just can carry out the winding and change, the maintenance degree of difficulty greatly increased, and maintenance cycle is longer.
In order to solve the above problems, people are always seeking an ideal technical solution.
Disclosure of Invention
An object of the present invention is to address the disadvantages of the prior art, and to provide a stator, an outer rotor motor, and an inner rotor motor having a minimum unit motor.
In order to achieve the purpose, the utility model adopts the technical scheme that: a stator with a minimum unit motor comprises a stator core, a conductive end ring and n straight-inserting type slot conductors which penetrate through the stator core along the axial direction, wherein n is an integral multiple of the phase number m; one end of the direct plug-in type slot conductor is detachably arranged on the conductive end ring and is in short circuit with other direct plug-in type slot conductors through the conductive end ring; every m of the in-line slot conductors are provided with different electrical phases by the power supply means to form a minimum unit motor.
Based on the above, every m adjacent in-line slot conductors are provided with different electrical phases by the power supply device.
Based on the above, every k adjacent in-line slot conductors are provided with the same electrical phase by the power supply device, the j-th in-line slot conductor and the j + k-l-th in-line slot conductor are provided with different electrical phases by the power supply device, k is n/m, j is 1,2 … m, and l belongs to [1, k ].
Based on the above, be equipped with n circumference evenly distributed and the axial stator slot that runs through stator core on the stator core, be equipped with n circumference evenly distributed's draw-in groove on the conductive end ring, every cut straightly formula groove conductor runs through and sets up in a stator slot, and one end stretches out insert behind the stator slot and establish in the draw-in groove.
The utility model also provides an outer rotor motor with the minimum unit motor, which comprises an inner stator and an outer rotor, wherein the inner stator is the stator.
The utility model also provides an inner rotor motor with the minimum unit motor, which comprises an outer stator and an inner rotor, wherein the inner stator is the stator.
Compared with the prior art, the utility model has substantive characteristics and progress, particularly,
1. the number of the unit motor slots is equal to the number of the phases, so that the unit motor structure with the minimum slot number is provided, more rotor magnetic poles can be arranged compared with the traditional integral slot winding structure motor, and the unit motor is more suitable for direct-drive low-speed large-torque application; compared with the traditional fractional slot single-layer and double-layer concentrated winding with the same slot pole number matching, the winding structure provided by the utility model has higher winding coefficient, and because each slot of the winding structure provided by the utility model only has a single-phase (single) conductor, the reliability of the winding structure provided by the utility model is higher than that of the fractional slot double-layer concentrated winding structure with two-phase windings in each slot.
2. The direct-insertion type slot conductor is simple in structural arrangement, wherein the direct-insertion type slot conductor penetrates through the stator core along the axial direction and one end of the direct-insertion type slot conductor is detachably mounted on the conductive end ring; compared with the traditional motor structure that when a motor winding has a fault, the winding can be replaced only after a rotor is usually disassembled, the direct-insert type slot conductor can be directly disassembled from the conductive end ring when the fault direct-insert type slot conductor is replaced, then the direct-insert type slot conductor is pulled out from the stator iron core, a new direct-insert type slot conductor is inserted into the stator iron core, and one end of the direct-insert type slot conductor is installed on the conductive end ring, so that the replacement is convenient.
3. One end of each slot direct insertion type slot conductor is in short circuit through a conductive end ring with a clamping slot, and the other end of each slot direct insertion type slot conductor is in parallel connection through each phase of direct insertion type slot conductor and then supplies power to each phase, so that the star-shaped slot conductor is suitable for star connection; compared with the traditional winding structure in which one loop winding structure of each phase forms one turn of coil, the direct insertion type slot conductor structure does not form a loop structure in each phase winding, so that cross-slot jumper arrangement is not required to be carried out on each phase winding, the material consumption of the end part of the conductor and the length of the end part are greatly reduced, the length of an invalid conductor is reduced under the condition that the effective length of the conductor is not changed, the ratio of the effective length of the conductor is greatly increased, and the utilization rate of the conductor is greatly improved; the motor structure provided by the utility model can solve the problems of overlarge end loss, serious end magnetic leakage and the like caused by overlong end of the traditional motor winding structure.
4. The number of the direct-insert type slot conductors in each slot is 1, namely single-stranded conductors formed by winding or connecting a plurality of conductors in parallel are only arranged, and the direct-insert type slot conductors are in a laminating design with the stator slots, so that the slot filling rate can be improved to the maximum extent. Because the number of the direct-insertion type slot conductors of each slot is 1, turn-to-turn short circuit faults do not exist, the concept of turns in the traditional winding does not exist, each phase of conductor is separated by the slot, and the probability of the turn-to-turn short circuit faults occurring in the slot is greatly reduced; all direct plug-in slot conductors are short-circuited by the tail end ring, so that no turn-to-turn short-circuit fault and no interphase short-circuit fault exist at the end part, and the reliability is higher.
Drawings
Fig. 1 is a schematic perspective view of a stator according to embodiment 1 of the present invention.
Fig. 2 is a schematic sectional view of a stator core in embodiment 1 of the utility model.
Fig. 3 is a schematic cross-sectional view of a conductive end ring in embodiment 1 of the present invention.
Fig. 4 shows the current flowing through the conductors of the respective phases in embodiment 1 of the present invention.
Fig. 5 shows the magnetic field distribution and the rotation direction at each time in example 1 of the present invention.
In the figure: 1. a stator core; 2. a stator slot; 3. a direct insertion slot conductor; 4. a conductive end ring; 5. a clamping groove.
Detailed Description
The technical solution of the present invention is further described in detail by the following embodiments.
Example 1
The present embodiment provides a stator with a minimum unit motor, as shown in fig. 1, including a stator core 1, a conductive end ring 4, and n in-line slot conductors 3 axially penetrating the stator core 1, where n is an integer multiple of a phase number m; one end of the straight-inserting type slot conductor 3 is detachably arranged on the conductive end ring 4 and is in short circuit with other straight-inserting type slot conductors 3 through the conductive end ring 4; every m of the in-line slot conductors 3 are supplied with a different electrical phase by the power supply means to form a minimum unit motor.
The number of the unit motor slots is equal to the number of the phases, so that the unit motor structure with the minimum slot number is provided, more rotor magnetic poles can be arranged compared with the traditional integral slot winding structure motor, and the unit motor is more suitable for direct-drive low-speed large-torque application; compared with the traditional fractional slot single-layer and double-layer concentrated winding with the same slot pole number matching, the winding structure provided by the utility model has higher winding coefficient, and because each slot of the winding structure provided by the utility model only has a single-phase (single) conductor, the reliability of the winding structure provided by the utility model is higher than that of the fractional slot double-layer concentrated winding structure with two-phase windings in each slot.
The direct-insert type slot conductor is simple in structural arrangement, wherein the direct-insert type slot conductor 3 penetrates through the stator core 1 along the axial direction, and one end of the direct-insert type slot conductor is detachably mounted on the conductive end ring 4; compared with the traditional motor structure that when the motor winding has a fault, the winding can be replaced only after the rotor is generally disassembled, the utility model can directly disassemble the direct insertion type slot conductor 3 from the conductive end ring 4 when the fault direct insertion type slot conductor 3 is replaced, then pull out the direct insertion type slot conductor 3 from the stator iron core 1, insert a new direct insertion type slot conductor 3 into the stator iron core 1, and install one end of the direct insertion type slot conductor 3 on the conductive end ring 4, thus the replacement is convenient.
In one embodiment, as shown in fig. 2-3, the in-line slot conductor 3 is a single straight conductor or a single wire formed by winding a plurality of wires in parallel or in parallel. The stator core 1 is provided with a plurality of stator slots 2 which are uniformly distributed in the circumferential direction and axially penetrate through the cylindrical stator core, each direct insertion type slot conductor 3 penetrates through one stator slot 2, and two ends of each direct insertion type slot conductor respectively extend out of the stator slots 2; a plurality of clamping grooves 5 which are uniformly distributed in the circumferential direction are formed in the conductive end ring 4, and one end of the direct insertion type groove conductor 3 is inserted into the clamping grooves 5; and the shapes of the stator slot 2 and the slot 5 are adapted to the shape of the in-line slot conductor 3.
The number of the direct-insert type slot conductors 3 in each slot is 1, namely, only a single conductor or a plurality of single-strand conductors formed by parallel winding or parallel connection are arranged, and the direct-insert type slot conductors 3 are in a shape of being attached to the stator slots 2, so that the slot filling rate can be improved to the maximum extent. Because the number of the direct-insert type slot conductors 3 in each slot is 1, the inter-turn short circuit fault does not exist, the concept of the number of turns in the traditional winding does not exist, and the direct-insert type slot conductors 3 in each phase are separated by the stator slots 2, so the probability of the inter-phase short circuit fault in the slots is greatly reduced; all the direct-plug type slot conductors 3 are in short circuit through the conductive end rings 4, so that no turn-to-turn short circuit fault or phase-to-phase short circuit fault exists at the end parts, and the reliability is higher.
One end of each slot direct-insert slot conductor 3 is in short circuit through a conductive end ring 4 with a clamping slot, and the other end of each slot direct-insert slot conductor is in parallel connection through each phase of direct-insert slot conductor 3 and then supplies power to each phase, so that the utility model is suitable for star connection; compared with the traditional winding structure in which one loop winding structure of each phase forms one turn of coil, the direct insertion type slot conductor 3 structure does not form a loop structure in each phase winding, so that cross-slot jumper arrangement is not needed to be carried out on each phase winding, the material consumption of the end part of the conductor and the length of the end part are greatly reduced, the length of an invalid conductor is reduced under the condition that the effective length of the conductor is not changed, the effective length ratio of the conductor is greatly increased, and the utilization rate of the conductor is greatly improved; the motor structure provided by the utility model can solve the problems of overlarge end loss, serious end magnetic leakage and the like caused by overlong end of the traditional motor winding structure.
In specific implementation, the number m of the phases is at least more than or equal to 3, and each m adjacent in-line slot conductors are provided with different electrical phases by a power supply device.
The working principle of the utility model is as follows:
and inserting the straight-line slot conductor 3 into the stator slot 2, wherein one end of the straight-line slot conductor 3 is short-circuited by the conductive end ring 4, and the other end of the straight-line slot conductor 3 is connected with a power supply device, as shown in figure 1. A. The phase currents of the respective direct-insert type slot conductors 3 of the three phases B and C change along with time under the condition of electrifying as shown in figure 4, the three-phase currents change in a sine periodic manner, the positive value and the negative value of the phase currents correspond to each moment in table 1, the positive value and the negative value represent the current direction, therefore, the change of the magnetic force lines in the motor at the corresponding moment is shown in figure 5, the magnetic field in the motor rotates anticlockwise along with the change of time, and the motor also rotates anticlockwise.
TABLE 1 Current flow directions at various times of conductors of various phases
Example 2
This example differs from example 1 in that: every k adjacent in-line slot conductors are supplied with the same electrical phase by a power supply device, the j-th in-line slot conductor and the j + k-th in-line slot conductor are supplied with different electrical phases by the power supply device, k is n/m, j is 1,2 … m, and l belongs to [1, k ].
Example 3
The utility model also provides an outer rotor motor with a minimum unit motor, which comprises an inner stator and an outer rotor, wherein the inner stator is the stator described in the embodiment 1 or the embodiment 2, and the outer rotor can be an induction rotor, a reluctance rotor or a permanent magnet rotor.
When the outer rotor is the permanent magnet rotor, the number of poles of the rotor is 2N, and N is the number of unit motors.
The application field of the embodiment includes but is not limited to the field of high-speed motors, and particularly, the high-speed motors are preferably single-layer coils formed by winding a plurality of wires in parallel.
Example 4
The utility model also provides an inner rotor motor with a minimum unit motor, which comprises an outer stator and an inner rotor, wherein the outer stator is the stator described in embodiment 1 or embodiment 2, the inner rotor can be an induction rotor, a reluctance rotor or a permanent magnet rotor, and when the inner rotor is the permanent magnet rotor, the number of poles of the rotor is 2N, and N is the number of unit motors.
The application field of the embodiment includes but is not limited to the field of high-speed motors, and particularly, the high-speed motors are preferably provided with a single direct-insertion slot conductor formed by winding a plurality of wires in parallel.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications to the specific embodiments of the utility model or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the utility model as defined by the appended claims.
Claims (10)
1. A stator having a minimum unit motor, characterized in that: the stator comprises a stator core, a conductive end ring and n direct-insert slot conductors which are axially arranged on the stator core in a penetrating mode, wherein n is an integral multiple of the phase number m; one end of the direct plug-in type slot conductor is detachably arranged on the conductive end ring and is in short circuit with other direct plug-in type slot conductors through the conductive end ring; every m of the in-line slot conductors are provided with different electrical phases by the power supply means to form a minimum unit motor.
2. The stator with a minimum unit motor according to claim 1, wherein: every m adjacent in-line slot conductors are provided with a different electrical phase by the power supply means.
3. The stator with a minimum unit motor according to claim 1, wherein: every k adjacent in-line slot conductors are supplied with the same electrical phase by a power supply device, the j-th in-line slot conductor and the j + k-th in-line slot conductor are supplied with different electrical phases by the power supply device, k is n/m, j is 1,2 … m, and l belongs to [1, k ].
4. The stator with a minimum unit motor according to claim 1, wherein: the stator core is provided with n stator slots which are uniformly distributed in the circumferential direction and axially penetrate through the stator core, the conducting end ring is provided with n clamping grooves which are uniformly distributed in the circumferential direction, each straight-insertion slot conductor penetrates through one stator slot, and one end of each straight-insertion slot conductor extends out of the stator slot and is inserted into the clamping groove.
5. The stator with a minimum unit motor according to claim 4, wherein: the shapes of the stator slot and the clamping slot are matched with the shape of the direct insertion type slot conductor.
6. The stator with a minimum unit motor according to claim 1, wherein: the number of phases is at least equal to or greater than 3.
7. The stator with a minimum unit motor according to claim 1, wherein: the direct-insertion type slot conductor is a single linear conductor.
8. The stator with a minimum unit motor according to claim 1, wherein: the direct-insertion type slot conductor is a single-stranded conductor formed by winding or connecting a plurality of conductors in parallel.
9. An external rotor motor with minimum unit motor, includes inner stator and external rotor, its characterized in that: the inner stator is the stator of any one of claims 1-8.
10. An inner rotor motor with a minimum unit motor, comprising an outer stator and an inner rotor, characterized in that: the outer stator is the stator of any one of claims 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121328362.5U CN215378586U (en) | 2021-06-15 | 2021-06-15 | Stator with minimum unit motor, outer rotor motor and inner rotor motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121328362.5U CN215378586U (en) | 2021-06-15 | 2021-06-15 | Stator with minimum unit motor, outer rotor motor and inner rotor motor |
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| Publication Number | Publication Date |
|---|---|
| CN215378586U true CN215378586U (en) | 2021-12-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121328362.5U Active CN215378586U (en) | 2021-06-15 | 2021-06-15 | Stator with minimum unit motor, outer rotor motor and inner rotor motor |
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|---|---|
| CN (1) | CN215378586U (en) |
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2021
- 2021-06-15 CN CN202121328362.5U patent/CN215378586U/en active Active
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