Electronic speed regulator for brushless motor of unmanned aerial vehicle

Abstract

The utility model 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. According to the utility model, the problems of power supply stability, electromagnetic interference, high PCB manufacturing difficulty and high cost of the conventional electronic speed regulator of the brushless motor of the unmanned aerial vehicle are effectively solved.

Description

Technical Field

[0001] This utility model relates to the field of drone speed controller technology, specifically a drone brushless motor electronic speed controller. Background Technology

[0002] With the rapid development of drone technology, high-power brushless motors are being used more and more widely in drones. The electronic speed controller (ESC) of a brushless motor, as the core component controlling the motor's speed, directly affects the drone's flight stability and efficiency. An ESC typically consists of two parts: 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 high-current output.

[0003] In the design of electronic speed controllers, the power module's power supply lines need to carry a large current, typically requiring a thicker copper foil PCB (printed circuit board) to meet the demands of high current transmission. However, the controller module's power supply current is relatively small, and its internal chips are sensitive to power supply stability and noise. If both the power module and controller module's power supply lines use the same thick copper foil design, it may result in excessively low impedance in the controller module's power supply lines, affecting the chip's operational stability and even causing signal integrity issues.

[0004] Since the controller module and power module are usually integrated on the same PCB, the current difference between them further exacerbates this problem. The high-current lines of the power module may affect the signal lines of the controller module through electromagnetic coupling or ground interference, causing abnormal operation of the controller chip. In addition, the method of integrating the controller module and power module on a single PCB often requires more than 10 layers, which makes the manufacturing process more difficult and costly.

[0005] Therefore, there is an urgent need for a new type of electronic speed controller for brushless motors in drones, which can provide an effective solution to the shortcomings of existing technologies. Utility Model Content

[0006] The purpose of this invention is to provide an electronic speed controller for a brushless motor of a drone to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] An electronic speed controller for a brushless motor in a drone includes a controller module and a power module: the controller module controls the operating state of the brushless motor in the drone, and the power module controls the operating power of the brushless motor in the drone; the power module includes a power PCB board on which a power chip is soldered; the controller module includes an independent controller PCB board on which a controller chip is soldered, and the power PCB board has surface mount pads for the controller module on its upper surface, and the controller PCB board is soldered onto the surface mount pads for the controller module on the power PCB board; the copper foil thickness of the power PCB board and the controller PCB board is different, with the copper foil thickness of the power PCB board being greater than that of the controller PCB board.

[0009] Furthermore, the power PCB board has a square structure, the power board chip is soldered to the edge of the power PCB board, and the surface mount pad of the controller module is set at the center of the upper surface of the power PCB board.

[0010] Furthermore, the power PCB board has mounting and positioning holes at its four corners, which are engaged with the positioning posts on the drone body.

[0011] Furthermore, both the power PCB board and the controller PCB board have a six-layer structure.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. This utility model employs copper foil designs of different thicknesses for the power PCB board and the controller PCB board. The thicker copper foil on the power PCB board meets the requirements for high-current transmission, while the thinner copper foil on the controller PCB board reduces the impedance of the power supply lines, avoiding instability issues caused by excessively low power supply impedance in the controller chip. The controller PCB board is independently designed and connected to the power PCB board via surface mount pads, effectively isolating the electromagnetic coupling and ground interference of the high-current lines of the power module to the signal lines of the controller module, improving signal integrity, and facilitating standardized manufacturing and subsequent interchangeability and maintenance.

[0014] 2. Both the medium-power PCB board and the controller PCB board of this utility model have a six-layer structure, which significantly reduces the manufacturing difficulty and cost compared with the traditional integrated design of PCB boards with more than one layer. Attached Figure Description

[0015] Figure 1 An exploded view of the structure of an electronic speed controller for a brushless motor in a drone.

[0016] Figure 2 A schematic diagram of the front structure of an electronic speed controller for a brushless motor in a drone.

[0017] Figure 3 A schematic diagram of the back structure of an electronic speed controller for a brushless motor in a drone.

[0018] Figure 4-9 This is a structural diagram of the controller PCB board from the first to the sixth layer;

[0019] Figure 10-15 This is a structural diagram of the first to sixth layers of a power PCB board;

[0020] Figure 16-20 This is the schematic diagram of the controller module;

[0021] Figure 21-22 This is the schematic diagram of the power module.

[0022] In the diagram: 1. Power PCB board; 2. Controller PCB board; 3. Power board chip; 4. Controller chip; 5. Controller module surface mount pads; 6. Mounting positioning holes. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Example 1: Please refer to Figures 1-2 3. An electronic speed controller for a brushless motor of 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 1, on which a power board chip 3 is soldered; the controller module includes an independent controller PCB board 2, on which a controller chip 4 is soldered, and on which a controller module surface mount pad 5 is provided on the upper surface of the power PCB board 1, and the controller PCB board 2 is soldered onto the controller module surface mount pad 5 on the power PCB board 1; the copper foil thickness of the power PCB board 1 and the controller PCB board 2 is different, with the copper foil thickness of the power PCB board 1 being greater than that of the controller PCB board 2.

[0025] The power PCB board 1 has a square structure. The power board chip 3 is soldered to the edge of the power PCB board 1, and the surface mount pad 5 of the controller module is set at the center of the upper surface of the power PCB board 1.

[0026] The power PCB board 1 has mounting and positioning holes 6 at its four corners, which are connected to the positioning posts on the drone body.

[0027] Both the power PCB board 1 and the controller PCB board 2 have a six-layer structure.

[0028] Working principle of this embodiment:

[0029] In this embodiment, the controller chip 4 on the controller PCB board 2 receives control signals from the UAV. After signal processing and logic operations, it generates corresponding PWM pulse width modulation signals to control the working state of the brushless motor, such as speed and direction. 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, thereby driving the brushless motor. The power PCB board 1 adopts a thicker copper foil design, which can carry large currents and ensure the efficient operation of the motor. The four corners of the power PCB board 1 are provided with mounting positioning holes 6, which are connected to the positioning posts on the UAV body to achieve a stable installation of the electronic speed controller. In this embodiment, the controller PCB board 2 is soldered 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. This ensures the stability of signal transmission and avoids interference from the large current of the power module to the controller module. In addition, the control module can be uniformly manufactured, the control module circuit is highly integrated, the size is small, and it can be used with various different power modules, which facilitates the subsequent interchangeability and maintenance of the UAV brushless motor electronic speed controller.

[0030] In this embodiment, the power PCB board 1 and the controller PCB board 2 use copper foil of different thicknesses. The thick copper foil of the power PCB board 1 can meet the requirements of high current transmission, while the thin copper foil of the controller PCB board 2 reduces the impedance of the power supply line, avoiding the instability problem of the controller chip 4 due to excessively low power supply impedance. The controller PCB board 2 is designed independently and connected to the power PCB board 1 through surface mount pads 5, effectively isolating the electromagnetic coupling and ground interference of the high current line of the power module to the signal line of the controller module, improving signal integrity, and facilitating standardized manufacturing and subsequent interchangeability and maintenance.

[0031] In this embodiment, both the power PCB board 1 and the controller PCB board 2 are six-layer structures, which significantly reduces the manufacturing difficulty and cost compared to the traditional integrated design of PCB boards with more than 10 layers.

Claims

1. An electronic speed controller for a brushless motor of a drone, characterized in that, Includes controller module and 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), on which a power board chip (3) is soldered; The controller module includes an independent controller PCB board (2), on which a controller chip (4) is soldered. The power PCB board (1) has a controller module surface mount pad (5) on its upper surface. The controller PCB board (2) is soldered onto the controller module surface mount pad (5) on the power PCB board (1). The copper foil thickness of the power PCB board (1) and the controller PCB board (2) is different, and the copper foil thickness of the power PCB board (1) is greater than that of the controller PCB board (2).

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

3. The electronic speed controller for a brushless motor of a drone according to claim 1, characterized in that: The power PCB board (1) has mounting and positioning holes (6) at its four corners, which are connected to the positioning posts on the drone body.

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

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