Unmanned aerial vehicle driving circuit

Abstract

The embodiment of the utility model discloses an unmanned aerial vehicle drive circuit, which comprises a flight control system, a driver group, a temperature sensor group and a motor group, and is characterized in that the flight control system is connected with the motor group through the driver group, the output ends of motors in the motor group are connected in parallel through output shafts, and the temperature sensor group is connected with the temperature sensor group. The temperature sensor group is arranged between the driver group and the motor group, each driver in the driver group performs data interaction through a communication port, and each motor in the motor group is in one-to-one correspondence with each driver in the driver group. Each driver in the driver group realizes data sharing, so that the control output is synchronous, the current sharing effect of motor winding driving is realized, the total power is ensured to be maximized, and meanwhile, the rotating speed control is also ensured to be more accurate.

Description

Technical Field

[0001] This utility model relates to the field of unmanned aerial vehicle (UAV) motor control technology, and in particular to a UAV drive circuit. Background Technology

[0002] For large aircraft, the reliability and capacity of the propulsion system face more stringent requirements. The propulsion system includes the propeller, motor, and drive unit. Currently, heavy-duty aircraft often employ a coaxial dual-propeller configuration to achieve higher thrust and redundancy. However, this coaxial dual-propeller configuration reduces overall thrust by 15% to 20%, and some aircraft structures cannot accommodate this configuration. Therefore, parallel dual-motor or dual-winding motors driving the same propeller are also available on the market.

[0003] Existing dual-motor (or dual-winding motor) drive schemes, if a single fault occurs, such as a driver failure and stop outputting power, will cause the system's continuous output power to be halved, resulting in a halving of the propeller's lift. If the aircraft is operating under heavy load at this time, there will be insufficient power, leading to the risk of crashing. Utility Model Content

[0004] In view of this, the present invention provides a drone drive circuit to solve the problem that if a single fault occurs in the existing dual-motor (or dual-winding motor) drive scheme, such as a driver failure and stop output, the continuous output power of the system will be halved, resulting in a halving of the lift generated by the propeller. If the aircraft is operating under heavy load at this time, there will be insufficient power and the risk of crash.

[0005] To achieve one or more of the above objectives or other objectives, this utility model proposes a drone drive circuit, comprising: a flight control system, a driver assembly, a temperature sensor assembly, and a motor assembly;

[0006] The flight control system is connected to the motor group through the driver group. The output terminals of each motor in the motor group are connected in parallel through the output shaft. The temperature sensor group is set between the driver group and the motor group. Each driver in the driver group interacts with each other through the second communication port of each driver. Each motor in the motor group corresponds one-to-one with each driver in the driver group.

[0007] Optionally, the driver group includes a first driver, a second driver, a third driver, and a fourth driver; the first output port of the flight control system is connected to the first communication ports of the first driver and the second driver, and the second output port of the flight control system is connected to the first communication ports of the third driver and the fourth driver.

[0008] Optionally, the motor assembly includes a first motor, a second motor, a third motor, and a fourth motor, wherein the output port of the first driver is connected to the first motor, the output port of the second driver is connected to the second motor, the output port of the third driver is connected to the third motor, and the output port of the fourth driver is connected to the fourth motor.

[0009] Optionally, the temperature sensor group includes a first temperature sensor, a second temperature sensor, a third temperature sensor, and a fourth temperature sensor. The first temperature sensor is disposed on the winding of the first motor, and its output signal line is connected to the first driver. The second temperature sensor is disposed on the winding of the second motor, and its output signal line is connected to the second driver. The third temperature sensor is disposed on the winding of the third motor, and its output signal line is connected to the third driver. The fourth temperature sensor is disposed on the winding of the fourth motor, and its output signal line is connected to the fourth driver.

[0010] Optionally, the circuit further includes a rotor position sensor group, which includes a first rotor position sensor, a second rotor position sensor, a third rotor position sensor, and a fourth rotor position sensor. The first rotor position sensor is disposed on the first motor, and its output signal line is connected to the first driver. The second rotor position sensor is disposed on the second motor, and its output signal line is connected to the second driver. The third rotor position sensor is disposed on the third motor, and its output signal line is connected to the third driver. The fourth rotor position sensor is disposed on the fourth motor, and its output signal line is connected to the fourth driver.

[0011] Optionally, each driver in the driver group can exchange data between the data collected by the temperature sensor group and the data collected by the rotor position sensor group through the second communication port of each driver.

[0012] Implementing the embodiments of this utility model will have the following beneficial effects:

[0013] This system employs multiple independent motors connected in parallel via their output shafts. This effectively increases the total output power. Furthermore, each motor drive system operates independently, ensuring at least 3 / 4 of the continuous output power even in the event of a single fault, significantly enhancing system safety. Each motor drive system operates independently, with each driver exchanging control information via a CAN bus (CAN3) to achieve torque balancing and real-time synchronized control commands. This results in advantages such as high response speed and high power levels. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] in:

[0016] Figure 1 This is a schematic diagram of the structure of a drone drive circuit provided in an embodiment of this application. Detailed Implementation

[0017] 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.

[0018] like Figure 1 As shown, this application provides a drone drive circuit, including: a flight control system, a driver group, a temperature sensor group, and a motor group;

[0019] The flight control system is connected to the motor group through the driver group. The output terminals of each motor in the motor group are connected in parallel through the output shaft. The temperature sensor group is set between the driver group and the motor group. Each driver in the driver group interacts with each other through the second communication port of each driver. Each motor in the motor group corresponds one-to-one with each driver in the driver group.

[0020] This system employs multiple independent motors connected in parallel via their output shafts. This effectively increases the total output power. Furthermore, each motor drive system operates independently, ensuring at least 3 / 4 of the continuous output power even in the event of a single fault, significantly enhancing system safety. Each motor drive system operates independently, with each driver exchanging control information via a CAN bus (CAN3) to achieve torque balancing and real-time synchronized control commands. This results in advantages such as high response speed and high power levels.

[0021] In one possible implementation, the driver group includes a first driver, a second driver, a third driver, and a fourth driver; the first output port of the flight control system is connected to the first communication ports of the first driver and the second driver, and the second output port of the flight control system is connected to the first communication ports of the third driver and the fourth driver.

[0022] In one possible implementation, the motor assembly includes a first motor, a second motor, a third motor, and a fourth motor, wherein the output port of the first driver is connected to the first motor, the output port of the second driver is connected to the second motor, the output port of the third driver is connected to the third motor, and the output port of the fourth driver is connected to the fourth motor.

[0023] Optionally, the temperature sensor group includes a first temperature sensor, a second temperature sensor, a third temperature sensor, and a fourth temperature sensor. The first temperature sensor is disposed on the winding of the first motor, and its output signal line is connected to the first driver. The second temperature sensor is disposed on the winding of the second motor, and its output signal line is connected to the second driver. The third temperature sensor is disposed on the winding of the third motor, and its output signal line is connected to the third driver. The fourth temperature sensor is disposed on the winding of the fourth motor, and its output signal line is connected to the fourth driver.

[0024] Optionally, the circuit further includes a rotor position sensor group, which includes a first rotor position sensor, a second rotor position sensor, a third rotor position sensor, and a fourth rotor position sensor. The first rotor position sensor is disposed on the first motor, and its output signal line is connected to the first driver. The second rotor position sensor is disposed on the second motor, and its output signal line is connected to the second driver. The third rotor position sensor is disposed on the third motor, and its output signal line is connected to the third driver. The fourth rotor position sensor is disposed on the fourth motor, and its output signal line is connected to the fourth driver.

[0025] In one possible implementation, each driver in the driver group interacts with the data collected by the temperature sensor group and the data collected by the rotor position sensor group through the second communication port of each driver.

[0026] Specifically, four motors are used for coaxial output, or the output shaft is transmitted separately via gears. Each of the four drivers has two CAN interfaces (communication interfaces). One CAN interface (second communication port) is used for data sharing between the drivers, containing data such as received throttle information, output current, and output voltage. Since the drivers have current loops and speed loops for motor control, the four drivers can control the output synchronously, keeping the output current consistent. This results in consistent temperature rise of the windings of the four parallel motors and the four drivers, demonstrating excellent performance.

[0027] The four drives operate independently; the failure of one will not affect the operation of the others, thus greatly improving system redundancy. Furthermore, the four drives are standard components; the higher the output power of each individual drive, the greater the total output power of the combined system. This makes it easy to maximize the overall power and achieve greater thrust. Primarily used in large aircraft weighing tons, it has a promising future in the transportation industry.

[0028] Specifically, the driver outputs three-phase drive lines to connect to the motor as a power drive circuit; the driver is equipped with a temperature acquisition interface to connect to the motor winding temperature sensors; the driver can selectively use a motor position sensor to obtain the motor rotor position, or it can operate without a position sensor using a sensorless observer scheme.

[0029] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A drone drive circuit, characterized in that, include: Flight control system, drive unit, temperature sensor unit, and motor unit; The flight control system is connected to the motor group through the driver group. The output terminals of each motor in the motor group are connected in parallel through the output shaft. The temperature sensor group is set between the driver group and the motor group. Each driver in the driver group interacts with each other through the second communication port of each driver. Each motor in the motor group corresponds one-to-one with each driver in the driver group.

2. The UAV drive circuit as described in claim 1, characterized in that, The driver group includes a first driver, a second driver, a third driver, and a fourth driver; the first output port of the flight control system is connected to the first communication port of the first driver and the second driver, and the second output port of the flight control system is connected to the first communication port of the third driver and the fourth driver.

3. The UAV drive circuit as described in claim 2, characterized in that, The motor assembly includes a first motor, a second motor, a third motor, and a fourth motor. The output port of the first driver is connected to the first motor, the output port of the second driver is connected to the second motor, the output port of the third driver is connected to the third motor, and the output port of the fourth driver is connected to the fourth motor.

4. The UAV drive circuit as described in claim 3, characterized in that, The temperature sensor group includes a first temperature sensor, a second temperature sensor, a third temperature sensor, and a fourth temperature sensor. The first temperature sensor is disposed on the winding of the first motor, and its output signal line is connected to the first driver. The second temperature sensor is disposed on the winding of the second motor, and its output signal line is connected to the second driver. The third temperature sensor is disposed on the winding of the third motor, and its output signal line is connected to the third driver. The fourth temperature sensor is disposed on the winding of the fourth motor, and its output signal line is connected to the fourth driver.

5. The UAV drive circuit as described in claim 3, characterized in that, The circuit further includes a rotor position sensor group, which includes a first rotor position sensor, a second rotor position sensor, a third rotor position sensor, and a fourth rotor position sensor. The first rotor position sensor is mounted on the first motor, and its output signal line is connected to the first driver. The second rotor position sensor is mounted on the second motor, and its output signal line is connected to the second driver. The third rotor position sensor is mounted on the third motor, and its output signal line is connected to the third driver. The fourth rotor position sensor is mounted on the fourth motor, and its output signal line is connected to the fourth driver.

6. The UAV drive circuit as described in claim 5, characterized in that, Each driver in the driver group interacts with the data collected by the temperature sensor group and the data collected by the rotor position sensor group through the second communication port of each driver.

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