Electronic speed regulator for brushless motor of unmanned aerial vehicle

Abstract

The invention relates to the technical field of unmanned aerial vehicle speed regulators, in particular to an unmanned aerial vehicle brushless motor electronic speed regulator which comprises a controller module and a power module, the controller module is used for controlling the working state of an unmanned aerial vehicle brushless motor, and the power module is used for controlling the working power of the unmanned aerial vehicle brushless motor; the power module comprises a power PCB (Printed Circuit Board), and a power board chip is welded on the power PCB; the controller module comprises an independent controller PCB, a controller chip is welded on the upper surface of the controller PCB, a controller module surface mounting bonding pad is arranged on the upper surface of the power PCB, and the controller PCB is welded on the controller module surface mounting bonding pad on the power PCB; the copper foil thickness of the power PCB is different from that of the controller PCB, and the copper foil thickness of the power PCB is larger than that of the controller PCB. The problems of power supply stability, electromagnetic interference, high PCB manufacturing difficulty and high cost of an existing unmanned aerial vehicle brushless motor electronic speed regulator are effectively solved.

Description

Technical Field

[0001] The present invention relates to the technical field of UAV speed regulators, and specifically to a brushless motor electronic speed regulator for UAVs. Background Art

[0002] With the rapid development of UAV technology, high-power brushless motors are increasingly widely used in UAVs. The electronic speed controller (ESC) of a brushless motor, as the core component for controlling the motor speed, directly affects the flight stability and efficiency of the UAV. The electronic speed controller usually consists of a controller module and a power module. The controller module is responsible for signal processing and logic control, while the power module is responsible for driving the motor and providing a large current output.

[0003] In the design of the electronic speed controller, the power supply line of the power module needs to carry a large current, and usually a thick copper foil PCB (printed circuit board) is required to meet the demand for large current transmission. However, the power supply current of the controller module is relatively small, and the chips inside are sensitive to the stability and noise of the power supply. If the power supply lines of the power module and the controller module adopt the same thick copper foil design, it may lead to too low impedance of the power supply line of the controller module, thus affecting the working stability of its chips and even causing signal integrity problems.

[0004] Since the controller module and the power module are usually integrated on the same PCB, the current difference between the two will further exacerbate this problem. The large current line of the power module may affect the signal line of the controller module through electromagnetic coupling or ground wire interference, resulting in abnormal operation of the controller chip. In addition, for the method of integrating and manufacturing the controller module and the power module on one PCB board, the number of PCB layers often needs to be more than 10 layers, and the manufacturing difficulty and cost are relatively high.

[0005] Therefore, there is an urgent need for a new type of brushless motor electronic speed regulator for UAVs to provide an effective solution to the defects of the existing technology. Summary of the Invention

[0006] The purpose of the present invention is to provide a brushless motor electronic speed regulator for UAVs to solve the problems raised in the above background art.

[0007] To achieve the above purpose, the present invention provides the following technical solutions:

[0008] A brushless motor electronic speed controller for a drone, comprising a controller module and a power module: the controller module is used to control the working state of the brushless motor of the drone, and the power module is used to control the working power of the brushless motor of the drone; the power module includes a power PCB board, and a power board chip is soldered on the power PCB board; the controller module includes an independent controller PCB board, a controller chip is soldered on the upper surface of the controller PCB board, a surface mount pad for the controller module is provided on the upper surface of the power PCB board, and the controller PCB board is soldered on the surface mount pad for the controller module on the power PCB board; the copper foil thicknesses of the power PCB board and the controller PCB board are different, and the copper foil thickness of the power PCB board is greater than that of the controller PCB board.

[0009] Further, the power PCB board is of a square structure, the power board chip is soldered on the edge of the power PCB board, and the surface mount pad for the controller module is arranged at the center position on the upper surface of the power PCB board.

[0010] Further, mounting positioning holes are provided at the four corner positions of the power PCB board, and the mounting positioning holes are inserted and matched with the positioning posts on the drone body.

[0011] Further, both the power PCB board and the controller PCB board are of a six-layer structure.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] 1. In the present invention, due to the design of different thickness copper foils for the power PCB board and the controller PCB board, the thick copper foil of the power PCB board can meet the large current transmission requirements, while the thin copper foil of the controller PCB board reduces the impedance of the power supply line and avoids the problem of unstable operation of the controller chip due to too low power supply impedance. The controller PCB board is independently designed and connected to the power PCB board through surface mount pads, effectively isolating the electromagnetic coupling and ground wire interference of the large current line of the power module to the signal line of the controller module, improving the signal integrity, and being easy to manufacture uniformly and convenient for subsequent interchange and repair.

[0014] 2. In the present invention, both the power PCB board and the controller PCB board are of a six-layer structure, which significantly reduces the manufacturing difficulty and manufacturing cost compared with the PCB board with more than one layer in the traditional integrated design. Description of the Drawings

[0015] Figure 1 It is a schematic exploded view of the structure of a brushless motor electronic speed controller for a drone;

[0016] Figure 2 It is a schematic front view of the structure of a brushless motor electronic speed controller for a drone;

[0017] Figure 3 Schematic diagram of the back structure of an electronic speed controller for a brushless motor of a drone;

[0018] Figure 4 Physical diagram of an electronic speed controller for a brushless motor of a drone;

[0019] Figures 5 - 10 Schematic diagram of the structure of the first to sixth layers of the controller PCB board;

[0020] Figures 11 - 16 Schematic diagram of the structure of the first to sixth layers of the power PCB board;

[0021] Figures 17 - 21 Schematic diagram of the controller module;

[0022] Figures 22 - 23 Schematic diagram of the power module.

[0023] In the figure: 1. Power PCB board; 2. Controller PCB board; 3. Power board chip; 4. Controller chip; 5. Surface mount pads of the controller module; 6. Mounting positioning holes. Specific implementation mode

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0025] Embodiment 1: Please refer to Figures 1 - 23 , an electronic speed controller for a brushless motor of a drone, including a controller module and a power module: the controller module is used to control the working state of the brushless motor of the drone, and the power module is used to control the working power of the brushless motor of the drone; the power module includes a power PCB board 1, and a power board chip 3 is soldered on the power PCB board 1; the controller module includes an independent controller PCB board 2, a controller chip 4 is soldered on the upper surface of the controller PCB board 2, the upper surface of the power PCB board 1 is provided with surface mount pads 5 of the controller module, and the controller PCB board 2 is soldered on the surface mount pads 5 of the controller module on the power PCB board 1; the copper foil thickness of the power PCB board 1 is different from that of the controller PCB board 2, and the copper foil thickness of the power PCB board 1 is greater than that of the controller PCB board 2.

[0026] The power PCB board 1 is of a square structure, the power board chip 3 is soldered on the edge of the power PCB board 1, and the surface mount pads 5 of the controller module are arranged at the center position of the upper surface of the power PCB board 1.

[0027] Four corner positions of the power PCB board 1 are provided with mounting positioning holes 6, and the mounting positioning holes 6 are inserted and matched with the positioning posts on the drone body.

[0028] Both the power PCB board 1 and the controller PCB board 2 are of six-layer structure.

[0029] Working principle of this embodiment:

[0030] In this embodiment, the controller chip 4 on the controller PCB board 2 receives the control signal from the drone. After signal processing and logical operation, it generates the corresponding PWM pulse width modulation signal to control the working state of the brushless motor, such as speed and steering. The power board chip 3 on the power PCB board 1 adjusts the magnitude and direction of the output current according to the PWM signal generated by the controller module, so as to drive the brushless motor to work. The power PCB board 1 adopts a thicker copper foil design, which can carry large currents and ensure the efficient operation of the motor. Four corner positions of the power PCB board 1 are provided with mounting positioning holes 6. By inserting and matching with the positioning posts on the drone body, the stable installation of the electronic speed controller is realized. In this embodiment, the controller PCB board 2 is welded to the power PCB board 1 through the surface mount pads 5 of the controller module, realizing the electrical connection between the controller module and the power module, ensuring the stability of signal transmission and avoiding the interference of the large current of the power module to the controller module. In addition, the control module can be manufactured uniformly. The control module circuit is highly integrated, small in size, can cooperate with various different power modules, and is convenient for the subsequent interchange and maintenance of the brushless motor electronic speed controller of the drone.

[0031] In this embodiment, since the power PCB board 1 and the controller PCB board 2 adopt copper foil designs with different thicknesses, the thick copper foil of the power PCB board 1 can meet the large current transmission requirements, while the thin copper foil of the controller PCB board 2 reduces the impedance of the power line and avoids the problem of unstable operation of the controller chip 4 due to too low power impedance. The controller PCB board 2 is independently designed and connected to the power PCB board 1 through the surface mount pads 5, effectively isolating the electromagnetic coupling and ground wire interference of the large current line of the power module to the signal line of the controller module, improving the signal integrity, and being easy to manufacture uniformly and convenient for subsequent interchange and maintenance.

[0032] In this embodiment, both the power PCB board 1 and the controller PCB board 2 are of six-layer structure. Compared with the traditional integrated design of more than 10-layer PCB boards, the manufacturing difficulty and manufacturing cost are significantly reduced.

Claims

1. An electronic speed regulator for a brushless motor of a drone, characterized in that: Including controller module and power module: The controller module is used to control the working state of the drone brushless motor, and the power module is used to control the working power of the drone brushless motor; The power module comprises a power PCB board (1), on which a power board chip (3) is welded; The controller module comprises an independent controller PCB board (2), a controller chip (4) is welded on the upper surface of the controller PCB board (2), a controller module surface mounting pad (5) is provided on the upper surface of the power PCB board (1), and the controller PCB board (2) is welded on the controller module surface mounting pad (5) on the power PCB board (1); The copper coating thickness of the power PCB board (1) and the controller PCB board (2) is different, and the copper coating thickness of the power PCB board (1) is greater than the copper coating thickness of the controller PCB board (2).

2. The electronic speed regulator for a brushless motor of a drone according to claim 1, characterized in that: The power PCB (1) is a square structure, the power board chip (3) is welded to the edge of the power PCB (1), and the controller module surface mounting pad (5) is arranged at the center position of the upper surface of the power PCB (1).

3. The electronic speed regulator for a brushless motor of a drone according to claim 1, characterized in that: The power PCB board (1) is provided with mounting positioning holes (6) at four corner positions, and the mounting positioning holes (6) are plugged into and matched with positioning posts on the drone body.

4. The electronic speed regulator for a brushless motor of a drone according to claim 1, characterized in that: The power PCB board (1) and the controller PCB board (2) both have a six-layer structure.

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