Motor starting assist device

Abstract

The utility model relates to the field of motor accessories, and discloses a motor starting assistor which comprises an auxiliary ring, a detection module and a control module, the auxiliary ring is used for being coaxially connected to a motor shaft, the detection module is used for being connected to a motor shell, and the detection module is used for detecting the circumferential position of the auxiliary ring to output a signal; the control module is used for receiving a signal to connect or disconnect the starting capacitor. The control module can judge the rotating speed of the auxiliary ring based on the signal, debugging of the starting process of the motor can be completed by debugging parameters and programs of the control module, disassembly and assembly are not needed, and convenience is achieved.

Description

Technical Field

[0001] The present application relates to the field of motor accessories, and in particular to a motor starting aid. Background Art

[0002] The centrifugal switch is a special switch, which is mainly used in the start-up control of single-phase motors. Its working principle is to use centrifugal force to control the connection and disconnection of the circuit.

[0003] When the motor starts and the motor speed is lower than the set value, the tension of the spring resets the centrifugal block, the moving contact contacts the fixed contact, and the starting capacitor is connected. When the motor reaches a certain speed, the centrifugal block moves due to the centrifugal force, separating the moving contact from the fixed contact, thereby disconnecting the starting capacitor.

[0004] The design of the centrifugal switch should meet the following requirements: minimum number of components, marginal factors of friction, easily modifiable cut-out / cut-in ratios, and easy accessibility.

[0005] When debugging the above centrifugal switch, it is necessary to disassemble and assemble repeatedly, which is inconvenient. Utility Model Content

[0006] In order to facilitate debugging, the present application provides a motor starting aid.

[0007] The motor starting aid provided in this application adopts the following technical solution:

[0008] A motor starting assistant includes an auxiliary ring, a detection module and a control module.

[0009] The auxiliary ring is used to be coaxially connected to the motor shaft,

[0010] The detection module is used to be connected to the motor housing, and the detection module is used to detect the circumferential position of the auxiliary ring to output a signal.

[0011] The control module is used to receive a signal to connect or disconnect the starting capacitor.

[0012] By adopting the above technical solution, the control module can determine the rotation speed of the auxiliary ring based on the signal. By debugging the parameters and programs of the control module, the motor starting process debugging can be completed without disassembly and assembly, which is relatively convenient.

[0013] Preferably, the auxiliary ring is magnetic.

[0014] Preferably, the auxiliary ring comprises a coaxial magnetic ring and a magnetic isolation plate.

[0015] The magnetic ring and / or magnetic isolation plate are used to be coaxially connected to the motor shaft.

[0016] The surface of the magnetic isolation plate facing away from the magnetic ring is used to face the stator and rotor.

[0017] By adopting the above technical solution, the influence between the auxiliary ring magnetic field and the stator and rotor magnetic fields of the motor is reduced.

[0018] Preferably, two magnetic isolation plates are provided, and the magnetic ring is located between the two magnetic isolation plates.

[0019] By adopting the above technical solution, there is no need to identify the direction of the auxiliary ring, which makes it easy to install the auxiliary ring on the motor shaft.

[0020] Preferably, the auxiliary ring comprises a ring body and a screw.

[0021] The ring body is provided with a threaded hole, the axis of the threaded hole is coplanar with the axis of the ring body, and there is an angle between the axis of the threaded hole and the axis of the ring body.

[0022] The screw is threadedly connected in the threaded hole, and the screw is used to squeeze the motor shaft.

[0023] By adopting the above technical solution, a coaxial fixed connection between the auxiliary ring and the motor shaft is achieved.

[0024] Preferably, three threaded holes are arranged at intervals along the circumference of the ring body, and any two of the threaded holes are located on both sides of the axis of another threaded hole.

[0025] The screws correspond to the threaded holes one by one.

[0026] By adopting the above technical solution, the relative position between the ring body and the motor shaft is adjusted by rotating the three screws to ensure that the ring body and the motor shaft are coaxial.

[0027] Preferably, the axes of the three threaded holes are not coplanar.

[0028] By adopting the above technical solution, the relative position between the ring body and the motor shaft is adjusted by rotating the three screws to ensure that the end face of the ring body is perpendicular to the motor shaft.

[0029] Preferably, the auxiliary ring is magnetic.

[0030] The material of the screw cannot be magnetized.

[0031] By adopting the above technical solution, the magnetic field of the auxiliary ring is not affected by the position of the screw, which is conducive to the detection module to accurately detect the circumferential position of the auxiliary ring.

[0032] Preferably, the detection module is provided with a mounting hole, and the mounting hole is used for bolts to pass through.

[0033] By adopting the above technical solution, the bolt passes through the mounting hole and is threadedly connected to the motor housing, thereby achieving a fixed connection between the detection module and the motor housing.

[0034] In summary, the present application includes at least one of the following beneficial technical effects:

[0035] The control module can determine the rotation speed of the auxiliary ring based on the signal. By debugging the parameters and programs of the control module, the motor start process can be debugged without disassembly and assembly, which is more convenient.

[0036] The surface of the magnetic isolation plate facing away from the magnetic ring is used to face the stator and rotor to reduce the influence between the magnetic field of the auxiliary ring and the magnetic field of the stator and rotor of the motor;

[0037] Adjust the relative position between the ring body and the motor shaft by turning the three screws to ensure that the ring body is coaxial with the motor shaft and the end face of the ring body is perpendicular to the motor shaft;

[0038] The material of the screw cannot be magnetized, and the magnetic field of the auxiliary ring is not affected by the position of the screw, which helps the detection module to accurately detect the circumferential position of the auxiliary ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 This is a schematic diagram of the motor starting aid being installed on the motor.

[0040] Figure 2 It is a schematic diagram of a motor starting aid.

[0041] Figure 3 is a schematic diagram of the auxiliary ring.

[0042] Explanation of the accompanying drawings: 1. Auxiliary ring; 11. Ring body; 111. Magnetic ring; 112. Magnetic isolation plate; 12. Screw; 13. Threaded hole; 2. Detection module; 21. Mounting hole. DETAILED DESCRIPTION

[0043] The present application is further described in detail below in conjunction with the accompanying drawings.

[0044] Reference Figure 1 and Figure 2 The embodiment of the present application discloses a motor starting assistant, including an auxiliary ring 1, a detection module 2 and a control module (not shown in the figure).

[0045] The auxiliary ring 1 is used to be coaxially connected to the motor shaft. The detection module 2 is used to be connected to the motor housing, and the detection module 2 is used to detect the circumferential position of the auxiliary ring 1 to output a signal. The control module is used to receive the signal, and the control module is used to connect or disconnect the starting capacitor based on the signal.

[0046] It should be noted that: a receiving groove is provided on the surface of the motor end cover facing the motor stator and rotor, and the auxiliary ring 1 is located in the receiving groove; the detection module 2 can be installed on the outer surface of the motor housing.

[0047] Reference Figure 2 and Figure 3The auxiliary ring 1 includes a ring body 11 and a screw 12.

[0048] The inner diameter of the ring body 11 is larger than the motor shaft diameter. The ring body 11 is provided with at least three threaded holes 13, and all threaded holes 13 are arranged at intervals along the circumference of the ring body 11. The axis of any threaded hole 13 is coplanar with the axis of the ring body 11, and there is an angle between the axis of any threaded hole 13 and the axis of the ring body 11.

[0049] For any axis of the threaded hole 13, at least two threaded holes 13 are located on both sides of the axis.

[0050] The axes of at least three threaded holes 13 are not coplanar.

[0051] In this embodiment, three threaded holes 13 are provided; the threaded holes 13 penetrate the inner and outer circumferences of the ring body 11 , and the axes of the threaded holes 13 are perpendicular to the axis of the ring body 11 .

[0052] The screws 12 correspond to the threaded holes 13 one by one, and the screws 12 are threadedly connected in the threaded holes 13 . The screws 12 are used to squeeze the motor shaft.

[0053] Reference Figure 1 and Figure 2 The detection module 2 is provided with a mounting hole 21, and the mounting hole 21 is used for a bolt to pass through. After passing through the mounting hole 21, the bolt is threadedly connected to the motor housing to achieve a fixed connection between the detection module 2 and the motor housing.

[0054] In one embodiment: the auxiliary ring 1 can use a grating, and the detection module 2 can use an infrared sensor; the auxiliary ring 1 rotates with the motor shaft, the infrared sensor outputs a pulse signal, and the control module controls the connection or disconnection of the starting capacitor based on the comparison result between the frequency of the pulse signal and the set frequency.

[0055] In this embodiment: refer to Figure 2 and Figure 3 , the auxiliary ring 1 is magnetic, and the detection module 2 can use a Hall sensor;

[0056] The ring body 11 includes a coaxial magnetic ring 111 and two magnetic isolation plates 112;

[0057] The magnetic ring 111 and / or the magnetic isolation plate 112 are used to be coaxially connected to the motor shaft; for example, the magnetic ring 111 and the magnetic isolation plate 112 can be fixed by gluing; the threaded hole 13 can be located at any position of the magnetic ring 111, the magnetic isolation plate 112, or the junction between the magnetic ring 111 and the magnetic isolation plate;

[0058] The magnetic ring 111 is located between two magnetic isolation plates 112, so that when the ring body 11 is connected to the motor shaft, the surface of one magnetic isolation plate 112 facing away from the magnetic ring 111 is used to face the stator and rotor;

[0059] The material of the screw 12 cannot be magnetized, such as copper, aluminum, plastic, etc.

[0060] The material of the screw 12 is preferably a lightweight material such as plastic, so as to reduce the influence on the center of mass of the auxiliary ring 1 when adjusting the position of the screw 12 .

[0061] The implementation principle of a motor starting assistant in an embodiment of the present application is: by rotating three screws 12 to adjust the relative position between the ring body 11 and the motor shaft, ensure that the ring body 11 is cocentric with the motor shaft and the end face of the ring body 11 is perpendicular to the motor shaft; the control module can determine the rotation speed of the auxiliary ring 1 based on the signal, and the motor starting process can be debugged by debugging the parameters and programs of the control module without disassembly and assembly, which is more convenient.

[0062] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A motor starting aid, characterized in that: It comprises an auxiliary ring (1), a detection module (2) and a control module. The auxiliary ring (1) is used to be coaxially connected to the motor shaft. The detection module (2) is used to be connected to the motor housing, and the detection module (2) is used to detect the circumferential position of the auxiliary ring (1) to output a signal. The control module is used to receive a signal to connect or disconnect the starting capacitor.

2. The motor starting aid according to claim 1, characterized in that: The auxiliary ring (1) is magnetic.

3. The motor starting aid according to claim 2, characterized in that: The auxiliary ring (1) comprises a coaxial magnetic ring (111) and a magnetic isolation plate (112). The magnetic ring (111) and / or the magnetic isolation plate (112) are used to be coaxially connected to the motor shaft. The surface of the magnetic isolation plate (112) facing away from the magnetic ring (111) is used to face the stator and rotor.

4. The motor starting aid according to claim 3, characterized in that: Two magnetic isolation plates (112) are provided, and the magnetic ring (111) is located between the two magnetic isolation plates (112).

5. The motor starting aid according to claim 1, characterized in that: The auxiliary ring (1) comprises a ring body (11) and a screw (12). The ring body (11) is provided with a threaded hole (13), the axis of the threaded hole (13) is coplanar with the axis of the ring body (11), and an angle exists between the axis of the threaded hole (13) and the axis of the ring body (11). The screw (12) is threadedly connected in the threaded hole (13), and the screw (12) is used to squeeze the motor shaft.

6. The motor starting aid according to claim 5, characterized in that: Three threaded holes (13) are arranged at intervals along the circumference of the ring body (11), and any two of the threaded holes (13) are located on both sides of the axis of another threaded hole (13). The screws (12) correspond to the threaded holes (13) one by one.

7. The motor starting aid according to claim 6, characterized in that: The axes of the three threaded holes (13) are not coplanar.

8. The motor starting aid according to claim 5, characterized in that: The auxiliary ring (1) has magnetic properties. The material of the screw (12) cannot be magnetized.

9. The motor starting aid according to claim 1, characterized in that: The detection module (2) is provided with a mounting hole (21), and the mounting hole (21) is used for a bolt to pass through.

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