Multi-coil-group induction motor stator and induction motor
By designing multi-coil groups and switching switches in the induction motor stator, switching between 2- and 4-pole motors is solved, and the problem of often changing motors of different pole numbers in the equipment is solved, reducing costs and improving adaptability.
Patent Information
- Application Number
- CN202421895806.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-06
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2034-08-06
AI Technical Summary
In some equipment with fans, it is often necessary to replace motors with different pole numbers, which leads to high cost and inconvenient adaptation to multiple application scenarios.
A multi-coil group induction motor stator is designed, including a stator core, a first winding coil and a second winding coil. By switching switches, switching between two-pole and four-pole motors is realized.
This design allows the induction motor to have multiple pole types at the same time, switch the operating mode according to needs, adapt to the needs of different scenarios, and reduce equipment costs and replacement frequency.
Smart Images
Figure CN223024194U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of motors, in particular to a stator of a multi-coil-group induction motor and an induction motor. Background Art
[0002] An induction motor is a device that places a rotor in a rotating magnetic field and obtains a driving torque under the action of the rotating magnetic field, thus causing the rotor to rotate.
[0003] The number of poles of a motor affects its performance and applications, including output power, rated speed, maximum speed, etc. Motors with different numbers of poles are suitable for different scenarios. For example, 2-pole motors are suitable for high-speed operation, 4-pole and 6-pole motors are suitable for mechanical equipment, and 8-pole motors are suitable for applications with large torque and low speed. Selecting the appropriate number of poles of the motor can improve performance, efficiency, and lifespan.
[0004] A 2-pole motor has the simplest structure, with only one positive pole and one negative pole. Due to the fast change of the magnetic field, a 2-pole motor has a high speed and power density, and is suitable for applications that require high-speed operation, such as fans, printers, electric fans, etc.
[0005] A 4-pole motor consists of two positive poles and two negative poles, and the magnetic field changes relatively slowly. A 4-pole motor has a medium speed and power density, and is suitable for some mechanical equipment, air-conditioning compressors, washing machines, etc.
[0006] A 6-pole motor consists of three positive poles and three negative poles, and the magnetic field changes slowly. A 6-pole motor has a lower speed and a larger torque, and is suitable for applications that require a larger torque but a lower speed, such as electric vehicles, power tools, etc.
[0007] An 8-pole motor consists of four positive poles and four negative poles, and the magnetic field changes slowly. An 8-pole motor has a lower speed and a larger torque, and is suitable for some applications that require a large torque but a low speed, such as elevators, rail transit, etc.
[0008] However, in some equipment with a fan, a 2-pole motor or a 4-pole motor may be required. At this time, it is often necessary to replace the motor, and even different models of equipment need to be prepared, resulting in high costs.
[0009] Therefore, there is an urgent need for a new type of induction motor that can solve the above problems. Summary of the Utility Model
[0010] The purpose of the utility model is to provide a stator of a multi-coil-group induction motor and an induction motor, which can simultaneously have motor types with multiple numbers of poles and can switch to the operating mode of the motor with the corresponding number of poles according to needs.
[0011] To achieve the above object, the utility model provides a stator of a multi-coil group induction motor, which includes a stator core, a first winding coil, a second winding coil and a switching switch. A plurality of winding installation grooves are circumferentially formed on the inner side wall of the stator core; the first winding coil is wound in the winding installation groove; the second winding coil is wound in the winding installation groove; each of the winding installation grooves is sequentially wound with the first winding coil and the second winding coil, and the first winding coil and the second winding coil are electrode winding coils with different pole numbers; the first electrode of the first winding coil and the first electrode of the second winding coil are electrically connected and then connected to the first electrode of the power supply, the second electrode of the first winding coil is led out to a first interface, and the second electrode of the second winding coil is led out to a second interface; the switching switch is connected in series between the second electrode of the power supply and the first interface and the second interface to switch the second electrode of the power supply to the first interface or the second interface to perform two-pole motor operation or four-pole motor operation.
[0012] Preferably, after the first electrodes of the first winding coil and the second winding coil are electrically connected, they sequentially pass through two temperature controllers and then are connected to the first electrode of the power supply.
[0013] Specifically, the two temperature controllers are respectively installed in the first winding coil and the second winding coil and fixed by copper buckles.
[0014] Preferably, the first winding coil is a 2-pole winding coil, and the second winding coil is a 4-pole winding coil; the first winding coil has four groups of first coils, and the four groups of first coils form two groups of electrodes and are arranged circumferentially along the inner circumference of the stator core; the second winding coil has eight groups of second coils, and each group of second coils forms four groups of electrodes and is arranged circumferentially along the inner circumference of the stator core.
[0015] Specifically, the stator core has 24 winding installation grooves, each group of first coils has 3 coils, and each group of second coils has 2 coils.
[0016] Preferably, the pole number of the first winding coil is less than that of the second winding coil, the first winding coil and the second winding coil are arranged in parallel in the winding installation groove, and the first winding coil is located inside the winding installation groove relative to the second winding coil.
[0017] Specifically, one first end of the switching switch is connected to the second electrode of the power supply, and the two second ends are respectively connected to the first interface and the second interface.
[0018] Preferably, the first winding coil and the second winding coil are simultaneously wound in the winding installation groove by a double-layer winding method.
[0019] Specifically, the first winding coil and the second winding coil are simultaneously wound around the winding installation groove by lap winding or wave winding.
[0020] The utility model discloses an induction motor, which comprises a stator and a rotor, and the stator is the stator of the multi-coil group induction motor as described above.
[0021] Compared with the prior art, in the induction motor stator of the utility model, there are two kinds of winding coils in one winding installation groove, so that the motor forms winding coil groups with different pole numbers, and then the corresponding winding coil groups are energized by switching through a change-over switch, so that the induction motor made of the induction motor stator can simultaneously have multiple motor types with different numbers of electrode poles, and can be switched to the motor operation mode with the corresponding pole number according to needs, and is suitable for a variety of different places. Description of the Drawings
[0022] Figure 1 is the structural diagram of the stator core of the stator of the utility model.
[0023] Figure 2a is the winding diagram of the first winding coil of the stator of the utility model.
[0024] Figure 2b is the winding diagram of the second winding coil of the stator of the utility model.
[0025] Figure 3 is the circuit diagram of the stator winding coil of the utility model.
[0026] Figure 4 is the illustration of the stator after winding the winding coil of the utility model. Detailed Embodiments
[0027] In order to describe in detail the technical content, structural features, achieved purposes and effects of the utility model, the following is described in detail in combination with the embodiments and with reference to the drawings.
[0028] Refer to Figures 1 to 2b, the present utility model discloses an induction motor, including a stator and a rotor. The stator includes a stator core 30, and a plurality of winding installation grooves (1-24) are circumferentially formed on the inner side wall of the stator core 30; a first winding coil 41 is wound in the winding installation grooves (1-24); a second winding coil 42 is wound in the winding installation grooves (1-24); each of the winding installation grooves (1-24) is sequentially wound with the first winding coil 41 and the second winding coil 42, and the first winding coil 41 and the second winding coil 42 are electrode winding coils with different pole numbers; the first electrode of the first winding coil 41 and the first electrode of the second winding coil 42 are electrically connected and then connected to the first electrode of the power supply 70, the second electrode VCC- of the first winding coil 41 is led out to a first interface a, and the second electrode VCC- of the second winding coil 42 is led out to a second interface b; a switching switch 60, the first end is connected to the second electrode VCC- of the power supply 70, and the two second ends are respectively connected to the first interface a and the second interface b, so as to switch the second electrode VCC- of the power supply to the first interface a or the second interface b to perform two-pole motor operation or four-pole motor operation. Among them, the induction motor of the present utility model is a single-phase motor. The rotor in this embodiment is a squirrel-cage rotor.
[0029] Reference Figure 3 , the first electrode VCC+ of the first winding coil 41 and the first electrode VCC+ of the second winding coil 42 are electrically connected and then sequentially pass through two temperature controllers 50 and are connected to the first electrode VCC+ of the power supply.
[0030] Specifically, the two temperature controllers 50 are respectively installed in the first winding coil 41 and the second winding coil 42 and fixed by copper buckles. Among them, the two temperature controllers 50 are respectively inserted into the coils of the first winding coil 41 and the second winding coil 42.
[0031] Reference Figure 2a and Figure 2b , the first winding coil 41 is a 2-pole winding coil, and the second winding coil 42 is a 4-pole winding coil; the first winding coil 41 has four groups of first coils, and the four groups of first coils form two groups of electrodes and are arranged circumferentially along the inner circumference of the stator core. Two first coils form a main winding 411, and two first coils form a secondary winding 412; the second winding coil 42 has eight groups of second coils, and each group of second coils forms four groups of electrodes and is arranged circumferentially along the inner circumference of the stator core. Four second coils form a main winding 421, and four second coils form a secondary winding 422.
[0032] Reference Figure 2a and Figure 2b, the stator core has 24 winding installation slots (1 - 24), each group of the first coils has 3 coils, and each group of the second coils has 2 coils.
[0033] Among them, the first winding coil 41 is not limited to 2 poles, and the second winding coil 42 is not limited to 4 poles. In this embodiment, the number of poles of the first winding coil 41 is less than that of the second winding coil 42. The first winding coil 41 and the second winding coil 42 are arranged in parallel in the winding installation slots (1 - 24), and the first winding coil 41 is located inside the winding installation slots (1 - 24) relative to the second winding coil 42.
[0034] Among them, the way that the first winding coil 41 and the second winding coil 42 are wound around the winding installation slots (1 - 24) simultaneously can be lap winding, wave winding or other winding ways of double-layer windings.
[0035] Reference Figure 4 , is the structural diagram of the stator after the first winding coil 41 and the second winding coil 42 are wound around the winding installation slots (1 - 24) simultaneously.
[0036] The above-disclosed are only the preferred embodiments of the present invention. Of course, the scope of the rights of the present invention cannot be limited thereby. Therefore, equivalent changes made according to the scope of the patent application of the present invention still fall within the scope covered by the present invention.
Claims
1. A multi-coil induction motor stator, characterized in that: include: A stator core, wherein the inner side wall of the stator core is provided with a plurality of winding installation grooves along the circumferential direction; A first winding coil is wound in the winding installation slot; A second winding coil is wound in the winding installation groove; Each of the winding installation grooves is sequentially wound with the first winding coil and the second winding coil, and the first winding coil and the second winding coil are electrode winding coils with different pole numbers; The first electrode of the first winding coil and the first electrode of the second winding coil are electrically connected and then connected to the first electrode of the power supply, the second electrode of the first winding coil is led out to the first interface, and the second electrode of the second winding coil is led out to the second interface; A switching switch is connected in series between the second electrode of the power supply and the first interface and the second interface to switch the second electrode of the power supply to the first interface or the second interface to perform two-pole motor operation or four-pole motor operation.
2. The multi-coil induction motor stator according to claim 1, characterized in that: The first electrode of the first winding coil and the first electrode of the second winding coil are electrically connected and then connected to the first electrode of the power supply through two temperature controllers in sequence.
3. The multi-coil induction motor stator according to claim 2, characterized in that: The two temperature controllers are respectively installed in the first winding coil and the second winding coil and fixed by copper buckles.
4. The multi-coil induction motor stator according to claim 1, characterized in that: The first winding coil is a 2-pole winding coil, and the second winding coil is a 4-pole winding coil; The first winding coil has four groups of first coils, the four groups of first coils form two groups of electrodes and are circumferentially arranged around the inner side of the stator core; The second winding coil has eight groups of second coils, each group of the second coils forms four groups of electrodes and is circumferentially arranged around the inner side of the stator core.
5. The multi-coil induction motor stator according to claim 4, characterized in that: The stator core has 24 winding installation slots, each group of the first coils has three coils, and each group of the second coils has two coils.
6. The multi-coil induction motor stator according to claim 1, characterized in that: The number of poles of the first winding coil is less than the number of poles of the second winding coil. The first winding coil and the second winding coil are arranged in parallel in the winding installation groove, and the first winding coil is located on the inner side of the winding installation groove relative to the second winding coil.
7. The multi-coil induction motor stator according to claim 1, characterized in that: A first end of the switch is connected to the second electrode of the power supply, and two second ends are connected to the first interface and the second interface respectively.
8. The multi-coil induction motor stator according to claim 1, characterized in that: The first winding coil and the second winding coil are simultaneously wound in the winding installation groove by a double-layer winding method.
9. The multi-coil induction motor stator according to claim 8, characterized in that: The first winding coil and the second winding coil are simultaneously wound in the winding installation slot by lap winding or wave winding.
10. An induction motor, characterized in that: It comprises a stator and a rotor, wherein the stator is a stator of a multi-coil induction motor as claimed in any one of claims 1 to 9.