Three-speed motor

Abstract

The utility model discloses a three-speed motor which comprises a support, a stator, a rotor and an output shaft, the stator is arranged on the support, the rotor is rotatably connected in the middle of the support, and the output shaft is arranged in the middle of the rotor and fixedly connected with the rotor. The stator comprises a plurality of coils, the coils are connected in series, and one end of each coil is connected with an external control end through different connecting lines. By conducting different connecting lines, the number of coils which are actually conducted is controlled, so that the power of the motor is controlled, and the rotating speed of the rotor is controlled.

Description

Technical Field

[0001] The utility model relates to the field of motors, in particular to a three-speed motor. Background Art

[0002] Existing motors mainly control the output power of the motor by controlling the input current or input voltage. This control method is not accurate enough and requires complex circuit design for control. For actual use, if the number of coils is directly controlled, the output of the motor can be controlled more simply and directly, and the motor is easier to maintain. Utility Model Content

[0003] The main purpose of the utility model is to provide a three-speed motor which has a simple structure, is easy to control and is convenient to maintain.

[0004] The utility model provides a three-speed motor, comprising a bracket, a stator, a rotor and an output shaft, wherein the stator is arranged on the bracket, the rotor is rotatably connected in the middle of the bracket, and the output shaft is arranged in the middle of the rotor and fixedly connected to the rotor;

[0005] The stator includes a plurality of coils, the coils are connected in series, and one end of the plurality of coils is connected to an external control end through different connection lines;

[0006] By conducting different connecting lines, the number of the windings that are actually conducted is controlled, thereby controlling the power of the motor and controlling the rotation speed of the rotor.

[0007] Preferably, the top and bottom of the bracket are respectively provided with bracket through holes, connecting bearings are provided in the bracket through holes, and the output shaft is arranged in the bracket through holes through the connecting bearings.

[0008] Preferably, a cooling fan is further included. A cooling fan is arranged on one end of the output shaft. The cooling fan is driven to rotate by the output shaft, so that the cooling fan dissipates heat for the three-speed motor.

[0009] Preferably, a connector is provided on one end of the output shaft, a connecting groove is provided between the connector and the output shaft, and the connector is connected to an external structure through the connecting groove.

[0010] Preferably, a connecting seat is provided on the bracket, and a connecting seat connecting hole is provided on the connecting seat, and the three-speed motor is connected to the external structure through the connecting seat connecting hole.

[0011] The beneficial effects of the three-speed motor of the utility model are:

[0012] 1. By setting up multiple coils, the working efficiency of the motor can be controlled by controlling the number of coils connected to the working circuit, thereby controlling the speed of the motor.

[0013] 2. A cooling fan is arranged at the bottom of the output shaft so that the three-speed motor can be cooled by the cooling fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a side view of the three-speed motor of the utility model;

[0015] Figure 2 It is a top view of the three-speed motor of the utility model;

[0016] Figure 3 It is a circuit diagram of the three-speed motor of the utility model;

[0017] Numbers in the figure: 1. bracket, 2. stator, 3. rotor, 4. output shaft, 5. cooling fan, 6. output circuit, 7. first input circuit, 8. second input circuit, 9. third input circuit, 11. connecting seat, 111. connecting seat connecting hole, 21. first wire package, 22. second wire package, 23. third wire package, 24. fourth wire package.

[0018] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0019] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0020] Reference Figures 1 to 3 , an embodiment of the three-speed motor of the utility model is proposed:

[0021] A three-speed motor comprises a bracket 1, a stator 2, a rotor 3, a cooling fan 5 and an output shaft 4.

[0022] The stator 2 is arranged on the outside of the bracket 1, the bracket 1 is provided with bracket through holes at the top and bottom, and connecting bearings are arranged inside the bracket through holes. The rotor 3 is fixedly connected with the output shaft 4, and the rotor 3 is arranged inside the bracket 1. The upper and lower sides of the output shaft 4 are connected with the bracket through holes through connecting bearings. A connecting seat 11 is arranged on the outside of the top of the bracket 1, and a connecting seat connecting hole 111 is arranged on the connecting seat 11. The three-speed motor is fixedly connected with the external structure through the connecting seat connecting hole 111.

[0023] The cooling fan 5 is arranged on the output shaft 4 at the rear side and is fixedly connected to the output shaft 4. The cooling fan 5 is driven to rotate by the output shaft 4, so that the cooling fan 5 dissipates heat for the three-speed motor. A connector is arranged on the output shaft 4 at the front side, and a connecting groove is arranged between the connector and the output shaft 4. The connector is connected to the external structure through the connecting groove. The output shaft drives the external structure to rotate through the connector.

[0024] In this embodiment, the stator is composed of four coils, which are the first coil 21, the second coil 22, the third coil 23 and the fourth coil 24, wherein one end of the fourth coil 24 is connected to the output line, the first coil 21, the second coil 22, the third coil 23 and the fourth coil 24 are connected in series, and the ends of the first coil 21, the second coil 22 and the third coil 23 away from the fourth coil 24 are respectively connected to the first input line 7, the second input line 8 and the third input line 9. The output pins of the main control chip are respectively connected to the first input line 7, the second input line 8 and the third input line 9, and the three-speed motor is driven to work by selecting the corresponding first input line 7, the second input line 8 and the third input line 9, thereby realizing the three-speed design.

[0025] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structural transformation made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, is also included in the patent protection scope of the present invention.

Claims

1. A three-speed motor, characterized in that: It includes a bracket, a stator, a rotor and an output shaft, wherein the stator is arranged on the bracket, the rotor is rotatably connected in the middle of the bracket, and the output shaft is arranged in the middle of the rotor and fixedly connected to the rotor; The stator includes a plurality of coils, the coils are connected in series, and one end of the plurality of coils is connected to an external control end through different connection lines; By conducting different connecting lines, the number of the windings that are actually conducted is controlled, thereby controlling the power of the motor and controlling the rotation speed of the rotor.

2. The three-speed motor according to claim 1, characterized in that: The top and bottom of the bracket are respectively provided with bracket through holes, and connecting bearings are arranged in the bracket through holes. The output shaft is arranged in the bracket through holes through the connecting bearings.

3. The three-speed motor according to claim 1 or 2, characterized in that: It also includes a cooling fan. A cooling fan is arranged on one end of the output shaft. The cooling fan is driven to rotate by the output shaft, so that the cooling fan is used to dissipate the heat of the three-speed motor.

4. The three-speed motor according to claim 1 or 2, characterized in that: A connector is provided on one end of the output shaft, a connecting groove is provided between the connector and the output shaft, and the connector is connected to an external structure through the connecting groove.

5. The three-speed motor according to claim 1, characterized in that: The bracket is provided with a connecting seat, and the connecting seat is provided with a connecting seat connecting hole, and the three-speed motor is connected to the external structure through the connecting seat connecting hole.

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