Motor PCB structure and mute brushless motor

Abstract

The embodiment of the utility model relates to the technical field of motors, in particular to a motor PCB structure and a mute brushless motor, a PCB receives control signals through a positive electrode pad, a negative electrode pad and a control pad, and voltage input to a first coil is adjusted according to the control signals. Therefore, no extra Pmos drive needs to be added, meanwhile, 10-90% of the adjustable range PWM can be achieved through the driving chip, the adjusting range is wide, the application range of the motor voltage is wider, the rotating speed and the vibration sense range of the motor are wider, and the motor can be applied to more scenes.

Description

Technical Field

[0001] The embodiments of the present utility model relate to the technical field of motors, and particularly to a motor PCB structure and a silent brushless motor. Background Art

[0002] A brushless motor is a component that provides a vibration function in small mobile devices such as mobile phones, tablet computers, and watches. Generally, a brushless motor includes a housing, a stator, and a rotor. The stator generally generates magnetism through an energized coil. The coil of the stator and the magnet of the rotor generate a magnetic force that interacts with each other to drive the rotor to rotate, so that the shaft core of the eccentric structure rotates to generate vibration. The coil of the stator needs to be fixed on the PCB board, and the two wire ends of the coil need to be electrically connected to the PCB board, and are conducted with the external circuit through the PCB board to supply power to the coil to generate magnetism.

[0003] Currently, the flat brushless vibration motors on the market are basically at DC2.1V. Below this voltage, the IC cannot work, and the voltage range of DC2.1V - 3.3V is relatively narrow. The working voltage and rated voltage range of the IC are small, the speed and vibration intensity are not obvious, and at the same time, the adjustment range of the speed and vibration is small, the vibration feeling is relatively single, and the vibration feeling that weakens or strengthens gradually and has a hierarchy cannot be realized, which affects the user experience. Summary of the Utility Model

[0004] In view of the above problems, the embodiments of the present utility model provide a motor PCB structure and a silent brushless motor, which solve the problem that the flat brushless vibration motors on the market are basically at DC2.1V, below this voltage, the IC cannot work, and the voltage range of DC2.1V - 3.3V is relatively narrow. The working voltage and rated voltage range of the IC are small, the speed and vibration intensity are not obvious, and at the same time, the adjustment range of the speed and vibration is small, the vibration feeling is relatively single, and the vibration feeling that weakens or strengthens gradually and has a hierarchy cannot be realized, which affects the user experience.

[0005] In the first aspect, the present utility model provides a motor PCB structure, including:

[0006] A PCB board, provided with a positive electrode pad, a negative electrode pad, and a control pad;

[0007] A driving chip, provided with a positive input terminal connected to the positive electrode pad, a negative input terminal connected to the negative electrode pad, a control input terminal connected to the control pad, and a first positive terminal;

[0008] And a first coil, the first starting wire of the first coil is connected to the first positive terminal, and the first ending wire of the first coil is connected to the negative input terminal. The driving voltage of the first coil is adjusted according to the control signal input by the control pad.

[0009] In some alternative embodiments, the PCB board includes a main PCB board and an extension board. The extension board is connected to the main PCB board. The positive pad, negative pad, and control pad are disposed on the extension board, and the drive chip and the first coil are disposed on the main PCB board.

[0010] In some alternative embodiments, the PCB board is connected to an external power module through the positive pad and negative pad, and the PCB board is connected to an external control module through the control pad.

[0011] In some alternative embodiments, the PCB board is provided with a first input line, a second input line, and a third input line. The positive input terminal is connected to the positive pad through the first input line; the negative input terminal is connected to the negative pad through the second input line; the control input terminal is connected to the control pad through the third input line.

[0012] In some alternative embodiments, a capacitor is further connected between the first input line and the second input line.

[0013] In some alternative embodiments, a second coil is further included; the drive chip is provided with a second positive terminal and a second negative terminal. The second end wire of the second coil is connected to the second positive terminal and the second start wire of the second coil is connected to the second negative terminal. The drive voltage of the second coil is adjusted according to the control signal input through the control pad.

[0014] In some alternative embodiments, the main PCB board is further provided with a first connection wire, a second connection wire, a third connection wire, and a fourth connection wire;

[0015] The first connection wire is connected between the first positive terminal and the first start wire. The second connection wire is connected between the second positive terminal and the second end wire; the third connection wire is connected between the negative input terminal and the second negative terminal; the fourth connection wire is provided with a first pad and a second pad. The first pad is connected to the first end wire of the first coil, and the second pad is connected to the first start wire of the second coil.

[0016] In some alternative embodiments, the first coil and the second coil are symmetrically arranged.

[0017] In a second aspect, the present utility model provides a silent brushless motor, which includes an upper housing, a rotor assembly, a stator assembly and a lower housing; the upper housing and the lower housing form a housing with a cavity inside, the rotor assembly and the stator assembly are arranged inside the housing, and the rotor assembly is arranged above the stator assembly; the rotor assembly includes an injection molded part, a vibrator, a magnetic conductive sheet, a magnet and a bearing, the injection molded part and the vibrator are arranged horizontally to form a groove for accommodating the magnetic conductive sheet and the magnet, the bearing is arranged at the center of the groove and fixedly connected with the injection molded part, and the magnetic conductive sheet and the magnet are sequentially arranged in the groove; the stator assembly includes the motor PCB structure as described above, the motor PCB structure is connected to the lower housing through a shaft core, the shaft core is located at the center of the lower housing and the shaft core is rotationally connected with the bearing; a brake pad is further arranged between the lower housing and the motor PCB structure, and the brake pad is provided with a plurality of outwardly extending blades.

[0018] In some alternative embodiments, the shaft core and the bearing are made of ceramic structures.

[0019] The present utility model provides a motor PCB structure and a silent brushless motor. Compared with the prior art, the beneficial effects are as follows: The present utility model receives control signals through the positive electrode pad, the negative electrode pad and the control pad on the PCB board, and adjusts the voltage input to the first coil according to the control signals. Thus, it is possible to achieve without adding an additional Pmos driver, and at the same time, through the driver chip, a relatively wide adjustable range of PWM of 10 - 90% can be achieved, the application range of the motor voltage is wider, the speed and vibration range of the motor are wider, and more scenarios can be applied.

[0020] The above description is only an overview of the technical solutions of the embodiments of the present utility model. In order to be able to understand the technical means of the embodiments of the present utility model more clearly, it can be implemented according to the content of the description. And in order to make the above and other purposes, features and advantages of the embodiments of the present utility model more obvious and understandable, the following specifically illustrates the embodiments of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings are only used to illustrate the embodiments and are not considered as a limitation to the present utility model. And throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0022] Figure 1 shows a schematic structural diagram of the motor PCB structure provided by the present utility model;

[0023] Figure 2 shows a top view of the PCB board provided by the present utility model;

[0024] Figure 3 shows a schematic diagram of the interface of the driver chip provided by the present utility model;

[0025] Figure 4 Shows an internal schematic diagram of the drive chip provided by the present utility model;

[0026] Figure 5 Shows an exploded schematic diagram of the silent brushless motor provided by the present utility model.

[0027] Among them,

[0028] 1. PCB board; 11. PCB main board; 12. Extension board; 13. Positive electrode pad; 14. Negative electrode pad; 15. Control pad;

[0029] 2. Drive chip;

[0030] 3. First coil;

[0031] 4. Second coil;

[0032] 5. Capacitor;

[0033] 61. First input line; 62. Second input line; 63. Third input line; 64. First connection line; 65. Second connection line; 66. Third connection line; 67. Fourth connection line;

[0034] 100. Motor PCB structure; 200. Upper housing; 300. Lower housing; 400. Rotor assembly; 401. Injection molded part; 402. Vibrator; 403. Magnetic conductive sheet; 404. Permanent magnet; 405. Bearing; 500. Shaft core; 600. Brake pad. Detailed implementation manners

[0035] The exemplary embodiments of the present utility model will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present utility model are shown in the drawings, it should be understood that the present utility model can be implemented in various forms and should not be limited by the embodiments set forth herein.

[0036] Embodiment 1:

[0037] Figure 1-2The first embodiment of a motor PCB structure 100 of the present utility model is shown, which is applied in a brushless motor. Specifically, it includes a PCB board 1, a driving chip 2, and a first coil 3. Among them, the PCB board 1 is provided with a positive electrode pad 13, a negative electrode pad 14, and a control pad 15; the driving chip 2 is provided with a positive input terminal connected to the positive electrode pad 13, a negative input terminal connected to the negative electrode pad 14, a control input terminal connected to the control pad 15, and a first positive terminal; the first starting wire of the first coil 3 is connected to the first positive terminal and the first ending wire of the first coil 3 is connected to the negative input terminal, and the driving voltage of the first coil 3 is adjusted according to the control signal input through the control pad 15. In this embodiment, the present utility model receives a control signal on the PCB board 1 through the positive electrode pad 13, the negative electrode pad 14, and the control pad 15, and adjusts the voltage input to the first coil 3 according to the control signal. Thus, it is possible to achieve without adding an additional Pmos drive, and at the same time, through the driving chip 2, a relatively wide adjustable range of PWM of 10 - 90% can be achieved, the application range of the motor voltage is wider, the speed and vibration range of the motor are wider, and more scenarios can be applied.

[0038] In some alternative ways, referring to Figure 3-4 , the driving chip 2 can be a driving chip 2 such as the models SS6216 and TMI8118S. In this embodiment, the driving chip 2 can include a Hall sensor module Hall Sensor, an offset control module Offset Control, a logic control module Control Logic, a driving control module Driving Control, an output buffer module Output Buffer, a low dropout linear voltage regulator module LDO, and an overheat protection module TSD. The Hall sensor module converts the change of the motor magnetic field into an electrical signal and outputs the electrical signal to the offset control module. The low dropout linear voltage regulator module is used to provide a stable power supply, and the overheat protection module is used to protect the driving chip 2. The driving control module controls the driving output of the first positive terminal and the second positive terminal through the output buffer module according to the driving control module and the offset control module. The driving chip 2 is provided with a positive input terminal VDD connected to the positive electrode pad 13, a negative input terminal VSS connected to the negative electrode pad 14, a control input terminal CTL connected to the control pad 15, a first positive terminal OUT1, a second positive terminal OUT2, and a second negative terminal SEL.

[0039] In some alternative embodiments, the PCB board 1 includes a PCB main board 11 and an extension board 12. The extension board 12 is connected to the PCB main board 11. The positive electrode pad 13, the negative electrode pad 14, and the control pad 15 are disposed on the extension board 12, and the driving chip 2 and the first coil 3 are disposed on the PCB main board 11. In this embodiment, the PCB main board 11 can be disposed inside the housing of the brushless DC motor. The extension board 12 is connected to the PCB main board 11 and extends outside the housing of the brushless DC motor. The brushless DC motor is externally connected through the positive electrode pad 13, the negative electrode pad 14, and the control pad 15 on the extension board 12. The PCB board 1 is connected to an external power module through the positive electrode pad 13 and the negative electrode pad 14, and the PCB board 1 is connected to an external control module through the control pad 15. The external power module can be a constant current power supply of 2.1V - 5V. The external control module can be a microcontroller built into the device terminal.

[0040] In some alternative embodiments, the PCB board 1 is provided with a first input line 61, a second input line 62, and a third input line 63. The positive electrode input terminal is connected to the positive electrode pad 13 through the first input line 61. The negative electrode input terminal is connected to the negative electrode pad 14 through the second input line 62. The control input terminal is connected to the control pad 15 through the third input line 63. In this embodiment, the first input line 61 can be connected between the positive electrode input terminal and the positive electrode pad 13, and pads can be disposed at both ends of the first input line 61 to increase the welding area. The second input line 62 can be connected between the negative electrode input terminal and the negative electrode pad 14, and pads can be disposed at both ends of the second input line 62 to increase the welding area. The third input line 63 can be connected between the control input terminal and the control pad 15, and pads can be disposed at both ends of the third input line 63 to increase the welding area.

[0041] In some alternative embodiments, a capacitor 5 is further connected between the first input line 61 and the second input line 62, which is used to reduce the interference received by the motor PCB structure 100 and protect the normal operation of the circuit.

[0042] Embodiment 2:

[0043] Based on Embodiment 1, the present application further provides a second embodiment of a motor PCB structure 100, which specifically includes a PCB board 1, a driving chip 2, a first coil 3, and a second coil 4. Among them, the PCB board 1 is provided with a positive electrode pad 13, a negative electrode pad 14, and a control pad 15; the driving chip 2 is provided with a positive input terminal connected to the positive electrode pad 13, a negative input terminal connected to the negative electrode pad 14, a control input terminal connected to the control pad 15, and a first positive terminal; the first starting wire of the first coil 3 is connected to the first positive terminal and the first ending wire of the first coil 3 is connected to the negative input terminal, and the driving voltage of the first coil 3 is adjusted according to the control signal input through the control pad 15. In this embodiment, the utility model receives a control signal on the PCB board 1 through the positive electrode pad 13, the negative electrode pad 14, and the control pad 15, and adjusts the voltage input to the first coil 3 according to the control signal. The driving chip 2 is provided with a second positive terminal and a second negative terminal, the second ending wire of the second coil 4 is connected to the second positive terminal and the second starting wire of the second coil 4 is connected to the second negative terminal, and the driving voltage of the second coil 4 is adjusted according to the control signal input through the control pad 15. The first coil 3 and the second coil 4 are symmetrically arranged; so that the first coil 3 and the second coil 4 can be symmetrical with the magnet 404 of the rotor assembly 400, making the rotation of the shaft core 500 more uniform. Thereby, it is possible to achieve without adding an additional Pmos drive, and at the same time, through the driving chip 2, a wider adjustable range of PWM 10 - 90% can be achieved, the application range of the motor voltage is wider, the rotation speed and vibration range of the motor are wider, and more scenarios can be applied.

[0044] In some alternative ways, the PCB main board 11 is further provided with a first connecting wire 64, a second connecting wire 65, a third connecting wire 66, and a fourth connecting wire 67; the first connecting wire 64 is connected between the first positive terminal and the first starting wire, the second connecting wire 65 is connected between the second positive terminal and the second ending wire; the third connecting wire 66 is connected between the negative input terminal and the second negative terminal; the fourth connecting wire 67 is provided with a first pad and a second pad, the first pad is connected to the first ending wire of the first coil 3, and the second pad is connected to the first starting wire of the second coil 4. Among them, the third connecting wire 66 and the fourth connecting wire 67 can be connected to ground the first ending wire of the first coil 3 and the first starting wire of the second coil 4.

[0045] Embodiment 3:

[0046] Based on Embodiment 1 or 2, the present utility model provides a silent brushless motor, see Figure 5, including an upper housing 200, a rotor assembly 400, a stator assembly, and a lower housing 300; the upper housing 200 and the lower housing 300 form a housing with a cavity inside, the rotor assembly 400 and the stator assembly are arranged inside the housing, and the rotor assembly 400 is arranged above the stator assembly; the rotor assembly 400 includes an injection molded part 401, a vibrator 402, a magnetic conductive sheet 403, a magnet 404, and a bearing 405. The injection molded part 401 and the vibrator 402 are horizontally arranged to form a groove for accommodating the magnetic conductive sheet 403 and the magnet 404. The bearing 405 is arranged at the center of the groove and fixedly connected to the injection molded part 401. The magnetic conductive sheet 403 and the magnet 404 are sequentially arranged in the groove; the stator assembly includes the motor PCB structure 100 as described above. The motor PCB structure 100 is connected to the lower housing 300 through a shaft core 500. The shaft core 500 is located at the center of the lower housing 300 and the shaft core 500 is rotatably connected to the bearing 405; a brake pad 600 is further arranged between the lower housing 300 and the motor PCB structure 100. The brake pad 600 is provided with a plurality of blades extending outwards. In this embodiment, after the PCB structure is powered on, according to the control signal, the driving voltage of the first coil 3 and / or the second coil 4 is controlled, and a magnetic field is generated between the first coil 3, the second coil 4 and the magnet 404, so that the rotor assembly 400 rotates.

[0047] In some embodiments, the shaft core 500 and the bearing 405 of the present utility model are of ceramic structure. Using ceramic bearings 405, shaft cores 500 and ceramic gaskets increases wear resistance, and there are obvious improvements in vibration quantity and service life, with less noise, and even the motor can be in a silent state during operation. It solves the problems of the currently used SUS shaft and powder metallurgy bearings 405, where the lower end surface of the powder metallurgy bearing 405 contacts the graphene gasket surface of the motor, which is prone to wear, generates metal debris, increases the running resistance of the motor, and reduces the service life of the motor and increases the noise.

[0048] The present utility model provides a motor PCB structure 100 and a silent brushless motor. The present utility model receives control signals on the PCB board 1 through the positive electrode pad 13, the negative electrode pad 14, and the control pad 15, and adjusts the voltage input to the first coil 3 according to the control signals. Thus, it is possible to achieve without adding an additional Pmos drive, and at the same time, through the drive chip 2, a PWM with an adjustable range of 10 - 90% can be achieved, with a wider application range of the motor voltage, so that the speed and vibration range of the motor are wider, and more scenarios can be applied.

[0049] The algorithms or displays provided herein are not inherently related to any specific computer, virtual system, or other device. In addition, the embodiments of the present utility model are not directed to any specific programming language.

[0050] In the description provided herein, a number of specific details are set forth. It will be understood, however, that embodiments of the present invention may be practiced without these specific details. Similarly, in order to simplify the present invention and assist in understanding one or more of the various inventive aspects, in the foregoing description of exemplary embodiments of the present invention, the various features of the embodiments of the present invention are sometimes grouped together in a single embodiment, figure, or description thereof. Among them, the claims following the specific implementation are hereby expressly incorporated into the specific implementation, where each claim itself is a separate embodiment of the present invention.

[0051] Those skilled in the art can understand that the modules in the devices in the embodiments can be adaptively changed and arranged in one or more devices different from the embodiments. The modules or units or components in the embodiments can be combined into one module or unit or component, and in addition, they can be divided into multiple sub-modules or sub-units or sub-components. Except that at least some of such features and / or processes or units are mutually exclusive.

[0052] It should be noted that the above embodiments illustrate the present invention rather than limit the present invention, and those skilled in the art can design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in the claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The present invention can be implemented by means of hardware including several different elements and by means of a suitably programmed computer. In a unit claim listing several devices, several of these devices may be embodied by the same item of hardware. The use of the words first, second, and third, etc. does not denote any order. These words can be interpreted as names. The steps in the above embodiments, unless otherwise specified, should not be construed as limiting the order of execution.

Claims

1. A motor PCB structure, characterized in that, Comprising: A PCB board (1) provided with a positive electrode pad (13), a negative electrode pad (14) and a control pad (15); A driving chip (2) provided with a positive electrode input terminal connected to the positive electrode pad (13), a negative electrode input terminal connected to the negative electrode pad (14), a control input terminal connected to the control pad (15), and a first positive terminal; And a first coil (3), the first start wire of the first coil (3) is connected to the first positive terminal and the first end wire of the first coil (3) is connected to the negative electrode input terminal, and the driving voltage of the first coil (3) is adjusted according to the control signal input by the control pad (15).

2. The motor PCB structure according to claim 1, characterized in that, The PCB board (1) includes a PCB main board (11) and an extension board (12), the extension board (12) is connected to the PCB main board (11), the positive electrode pad (13), the negative electrode pad (14) and the control pad (15) are arranged on the extension board (12), and the driving chip (2) and the first coil (3) are arranged on the PCB main board (11).

3. The motor PCB structure according to claim 2, wherein The PCB board (1) is connected to an external power supply module through the positive electrode pad (13) and the negative electrode pad (14), and the PCB board (1) is connected to an external control module through the control pad (15).

4. The motor PCB structure according to claim 2, wherein, The PCB board (1) is provided with a first input line (61), a second input line (62), and a third input line (63), the positive electrode input terminal is connected to the positive electrode pad (13) through the first input line (61); the negative electrode input terminal is connected to the negative electrode pad (14) through the second input line (62); the control input terminal is connected to the control pad (15) through the third input line (63).

5. The motor PCB structure according to claim 4, wherein, A capacitor (5) is also connected between the first input line (61) and the second input line (62).

6. The motor PCB structure according to claim 2, wherein It further includes a second coil (4); the driving chip (2) is provided with a second positive terminal and a second negative terminal, the second end wire of the second coil (4) is connected to the second positive terminal and the second start wire of the second coil (4) is connected to the second negative terminal, and the driving voltage of the second coil (4) is adjusted according to the control signal input by the control pad (15).

7. The motor PCB structure according to claim 6, wherein The PCB main board (11) is further provided with a first connection line (64), a second connection line (65), a third connection line (66), and a fourth connection line (67); The first connection line (64) is connected between the first positive terminal and the first start wire, the second connection line (65) is connected between the second positive terminal and the second end wire; the third connection line (66) is connected between the negative electrode input terminal and the second negative terminal; the fourth connection line (67) is provided with a first pad and a second pad, the first pad is connected to the first end wire of the first coil (3), and the second pad is connected to the first start wire of the second coil (4).

8. The motor PCB structure according to claim 6, characterized in that, The first coil (3) and the second coil (4) are symmetrically arranged.

9. A silent brushless motor, characterized in that, It includes an upper housing (200), a rotor assembly (400), a stator assembly and a lower housing (300); the upper housing (200) and the lower housing (300) form a housing with a cavity inside, the rotor assembly (400) and the stator assembly are arranged inside the housing, and the rotor assembly (400) is arranged above the stator assembly; the rotor assembly (400) includes an injection molded part (401), a vibrator (402), a magnetic conductive sheet (403), a permanent magnet (404) and a bearing (405), the injection molded part (401) and the vibrator (402) are horizontally arranged to form a groove for accommodating the magnetic conductive sheet (403) and the permanent magnet (404), the bearing (405) is arranged at the center of the groove and fixedly connected to the injection molded part (401), and the magnetic conductive sheet (403) and the permanent magnet (404) are sequentially arranged in the groove; the stator assembly includes the motor PCB structure according to any one of claims 1-8, the motor PCB structure (100) is connected to the lower housing (300) through a shaft core (500), the shaft core (500) is located at the center of the lower housing (300) and the shaft core (500) is rotatably connected to the bearing (405); a brake pad (600) is further arranged between the lower housing (300) and the motor PCB structure (100), and the brake pad (600) is provided with a plurality of blades extending outwards.

10. The silent brushless motor according to claim 9, wherein The shaft core (500) and the bearing (405) are of ceramic structure.

Images