Motor system with excitation coil protection driving device

Abstract

The utility model relates to a motor system with a protection excitation coil driving device, which comprises a motor shell, a motor rotor assembly, a motor stator assembly and a wiring structure, the motor stator assembly is relatively fixedly connected in the motor shell, the motor rotor assembly can be rotatably connected with the motor shell relative to the motor stator assembly, and the wiring structure is arranged on the motor shell. A magnet exciting coil and a permanent magnet are correspondingly and alternatively arranged on the motor rotor assembly and the motor stator assembly, so that when the motor is in a non-electrified working state, the motor rotor assembly rotates relative to the motor stator assembly, electromotive force is generated, the magnet exciting coil is connected with an overvoltage protection device in parallel, and the overvoltage protection device can be arranged on a motor wiring board. The motor can also be arranged on a main control board of an upper computer, a product adopting the motor effectively prevents a driving device electrically connected with the motor from being damaged due to higher electromotive force generated when the motor is not electrified and rotates under the action of external force, a reliable motor product can be provided from the source, and reliable and safe performance of the product adopting the motor is ensured.

Description

[Technical field]

[0001] The utility model relates to motor technology, in particular to a motor system with a protective excitation coil driver. [Background technology]

[0002] There are many types of motors, and their applications are also very common. Motor products used in life include home appliances such as air conditioners, refrigerators, and security cameras. This type of motor is a micromotor, and is generally a stepper motor. Its structure mainly includes a rotor assembly with a permanent magnet and a stator assembly with an excitation coil that is relatively fixedly connected to the housing. Motors with this type of structure are generally bare machines without drive components when they leave the factory. In actual use, they are driven by a host computer. When this type of motor is used in home appliances, and the home appliance is not powered on, such as security cameras, people will try to turn the camera directly by hand to understand the range of its swinging camera. Such improper operation will cause the rotor assembly of the motor on the product to rotate relative to the stator assembly, thereby generating a corresponding electromotive force, such as Figure 4 As shown in FIG. 1 , when the security camera is not powered on, the electromotive force generated by the motor on the security camera is measured by directly rotating the camera manually.

[0003] Therefore, since home appliances such as air conditioners, refrigerators, and security cameras use motors of the above structure, they need to be controlled through a connection to a host computer, and some electronic components are provided on the host computer's main control board. The electronic components include driver devices for driving the motor. The driver devices have corresponding rated voltages and rated currents, such as chips and diodes. If the electromotive force generated by the motor exceeds the rated voltage of the corresponding driver device due to direct manual rotation, it will cause damage to the motor and make the product unusable.

[0004] In view of the above technical problems, the present invention is specially studied and proposed. [Contents of the utility model]

[0005] The technical problem to be solved by the utility model is to provide a motor system with a protective excitation coil driver. By connecting an overvoltage protection device in parallel to the excitation coil, the overvoltage protection device can be set on the motor terminal board or on the host computer main control board. Products using this motor effectively avoid the generation of a high electromotive force when the motor is not powered and rotated by external force, thereby avoiding damage to the driver electrically connected to it. Therefore, the technical solution of the utility model can provide reliable motor products from the source, ensuring that the performance of products using this motor is reliable and safe.

[0006] In order to solve the above technical problems, the utility model discloses a motor system with a protective excitation coil driver, comprising a motor housing 1, a motor rotor assembly 2, a motor stator assembly 3 and a wiring structure 4, wherein the motor stator assembly 3 is relatively fixedly connected to the motor housing 1, and the motor rotor assembly 2 is rotatably connected to the motor housing 1 relative to the motor stator assembly 3, and the motor rotor assembly 2 and the motor stator assembly 3 are respectively provided with an excitation coil 5 and a permanent magnet 6, so that the motor generates an electromotive force when the motor rotor assembly 2 rotates relative to the motor stator assembly 3 in a non-powered working state, and the excitation coil 5 is connected in parallel with an overvoltage protection device 7.

[0007] As described above, a motor system with a protective excitation coil driver is provided, wherein the motor rotor assembly 2 is provided with a permanent magnet 6, and correspondingly, the motor stator assembly 3 is provided with an excitation coil 5, the wiring structure 4 includes a terminal block 41, the wiring terminals of the excitation coil 5 are electrically connected to the terminal block 41, and the overvoltage protection device 7 is arranged on the terminal block 41 and connected in parallel with the excitation coil 5.

[0008] As described above, a motor system with a protective excitation coil driver is described, wherein the motor stator assembly 3 includes a coil frame 31, the excitation coil 5 is wound on the coil frame 31, the wiring structure 4 also includes a pin 42 fixedly connected to the coil frame 31, the terminal block 41 is relatively fixedly connected to the side of the coil frame 31 through the pin 42, and the pin 42 is electrically connected to the terminal block 41, and the wiring terminal of the excitation coil 5 is electrically connected to the pin 42 accordingly.

[0009] In the motor system with a protective excitation coil driver as described above, the wiring structure 4 further includes a wiring terminal 43 electrically connected to the wiring board 41 , or the wiring structure 4 further includes a wiring lead 45 electrically connected to the wiring board 41 .

[0010] In the motor system with a protective excitation coil drive device as described above, the wiring structure 4 further includes a terminal box 44 for connecting to the motor housing 1 to cover the terminal board 41 .

[0011] As described above, in a motor system with a protective excitation coil driver, the wiring structure 4 includes a host computer connection terminal arranged on the host computer main control board and electrically connected to the excitation coil 5, and the overvoltage protection device 7 is arranged on the host computer main control board and electrically connected to the host computer connection terminal.

[0012] In the motor system with a protective excitation coil driver as described above, the overvoltage protection device 7 is a transient voltage suppression diode.

[0013] Compared with the prior art, the utility model connects an overvoltage protection device in parallel to the excitation coil, and the products using this motor effectively avoid the generation of a high electromotive force when the motor is not powered and rotated by external force, which may cause damage to the driving device electrically connected to it. Therefore, the technical solution of the utility model can provide reliable motor products from the source, ensuring that the performance of the products using the motor is reliable and safe; and the solution has a simple structural design and a relatively economical manufacturing cost, which can greatly improve the reliability of the product.

Brief Description of the Drawings

[0014] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings, wherein:

[0015] Figure 1 It is a structural schematic diagram of the utility model connected with the host computer.

[0016] Figure 2 The utility model discloses an embodiment in which the motor adopts a wiring lead to be electrically connected to a wiring board.

[0017] Figure 3 This is another embodiment of the utility model in which the motor adopts a wiring terminal to be electrically connected to a wiring board.

[0018] Figure 4 An experimental diagram for testing the electromotive force generated by a security camera using an ordinary motor when it is artificially rotated.

[0019] Figure 5 The present invention is an experimental diagram for testing the electromotive force generated by a security camera using the motor of the utility model under artificial rotation.

[0020] Figure 6 This is a schematic diagram of another embodiment of the present invention in which an overvoltage protection device is arranged on a host computer main control board. [Specific implementation method]

[0021] The implementation modes of the present utility model are described in detail below in conjunction with the accompanying drawings.

[0022] like Figure 1-3 , Figure 5-6As shown, the utility model is a motor system with a protective excitation coil driver, comprising a motor housing 1, a motor rotor assembly 2, a motor stator assembly 3 and a wiring structure 4, wherein the motor stator assembly 3 is relatively fixedly connected to the motor housing 1, and the motor rotor assembly 2 can be rotatably connected to the motor housing 1 relative to the motor stator assembly 3, and the motor rotor assembly 2 and the motor stator assembly 3 are respectively provided with an excitation coil 5 and a permanent magnet 6, that is, when the motor rotor assembly 2 is provided with a permanent magnet 6, the motor stator assembly 3 is correspondingly provided with an excitation coil 5; or when the motor rotor assembly 2 is provided with an excitation coil 5, the motor stator assembly 3 is correspondingly provided with a permanent magnet 6. With such a motor structure, when the rotor assembly is rotated without power, the motor is converted into a generator. Therefore, when the motor rotor assembly 2 rotates relative to the motor stator assembly 3 in the non-powered working state, an electromotive force is generated, and when the generated electromotive force is reversely output to the host computer main control board, the drive device on the host computer main control board will be affected, especially when the generated electromotive force exceeds the rated voltage of the drive device, the corresponding drive device is likely to be burned, such as Figure 1-3 As shown, in order to effectively protect the drive device on the host computer main control board, an overvoltage protection device 7 is connected in parallel to each excitation coil 5 on the motor. Preferably, the overvoltage protection device 7 is a transient voltage suppression diode. The selection of transient voltage suppression diodes mainly considers the rated voltage of the drive device, such as Figure 5 As shown, it is a schematic diagram of the electromotive force generated by the excitation coil 5 being protected from overvoltage by the overvoltage protection device 7, which effectively ensures that the peak value of the generated electromotive force is lower than the rated voltage of the driving device.

[0023] like Figure 2 , 3 As shown, the wiring structure 4 includes a wiring board 41, the wiring terminal of the excitation coil 5 is electrically connected to the wiring board 41, and the overvoltage protection device 7 is arranged on the wiring board 41 and connected in parallel with the excitation coil 5; the motor stator assembly 3 includes a coil frame 31, the excitation coil 5 is wound on the coil frame 31, the wiring structure 4 also includes a pin 42 fixedly connected to the coil frame 31, the wiring board 41 is relatively fixedly connected to the side of the coil frame 31 through the pin 42, and the pin 42 is electrically connected to the wiring board 41, and the wiring terminal of the excitation coil 5 is correspondingly electrically connected to the pin 42; the wiring structure 4 also includes a wiring terminal 43 electrically connected to the wiring board 41, or the wiring structure 4 also includes a wiring lead 45 electrically connected to the wiring board 41; the wiring structure 4 also includes a wiring box 44 used to be connected to the motor housing 1 to cover the wiring board 41. Therefore, the connection structure of the utility model is simple and has almost no influence on the original installation and assembly process, so the manufacturing cost is very small, but the reliability of the product using the motor is effectively improved.

[0024] like Figure 6 As shown, as another embodiment of the utility model, the wiring structure 4 includes a host computer connection terminal arranged on the host computer main control board and electrically connected to the excitation coil 5, and the overvoltage protection device 7 is arranged on the host computer main control board and electrically connected to the host computer connection terminal. When connected for use, the motor is electrically connected to the host computer connection terminal accordingly, thereby also making the excitation coil 5 and the overvoltage protection device 7 connected in parallel. Such a structural design scheme can also effectively protect the function of the driving device on the host computer main control board.

Claims

1. A motor system with a protective excitation coil drive device, characterized in that The invention comprises a motor housing (1), a motor rotor assembly (2), a motor stator assembly (3) and a wiring structure (4); the motor stator assembly (3) is relatively fixedly connected to the motor housing (1); the motor rotor assembly (2) is rotatably connected to the motor housing (1) relative to the motor stator assembly (3); an excitation coil (5) and a permanent magnet (6) are selectively provided on the motor rotor assembly (2) and the motor stator assembly (3) respectively, so that the motor generates an electromotive force when the motor rotor assembly (2) rotates relative to the motor stator assembly (3) in a non-powered working state; and an overvoltage protection device (7) is connected in parallel to the excitation coil (5).

2. A motor system with a protective excitation coil driver according to claim 1, characterized in that The motor rotor assembly (2) is provided with a permanent magnet (6), and correspondingly, the motor stator assembly (3) is provided with an excitation coil (5), the wiring structure (4) comprises a wiring board (41), the wiring end of the excitation coil (5) is electrically connected to the wiring board (41), and the overvoltage protection device (7) is arranged on the wiring board (41) and connected in parallel with the excitation coil (5).

3. A motor system with a protective excitation coil driver according to claim 2, characterized in that The motor stator assembly (3) comprises a coil frame (31), the excitation coil (5) is wound on the coil frame (31), the wiring structure (4) further comprises a plug pin (42) fixedly connected to the coil frame (31), the wiring board (41) is relatively fixedly connected to the side of the coil frame (31) through the plug pin (42), and the plug pin (42) is electrically connected to the wiring board (41), and the wiring terminal of the excitation coil (5) is electrically connected to the plug pin (42) accordingly.

4. A motor system with a protective excitation coil driver according to claim 3, characterized in that The wiring structure (4) further includes a wiring terminal (43) electrically connected to the wiring board (41), or the wiring structure (4) further includes a wiring lead (45) electrically connected to the wiring board (41).

5. The motor system with a protective excitation coil driver according to claim 3, characterized in that The wiring structure (4) also includes a wiring box (44) used to be connected to the motor housing (1) to cover the wiring board (41).

6. The motor system with a protective excitation coil driver according to claim 1, characterized in that The wiring structure (4) comprises a host computer connection terminal arranged on a host computer main control board and electrically connected to an excitation coil (5); the overvoltage protection device (7) is arranged on the host computer main control board and electrically connected to the host computer connection terminal.

7. A motor system with a protective excitation coil driver according to any one of claims 1 to 6, characterized in that The overvoltage protection device (7) is a transient voltage suppression diode.

Images