Electric aircraft dual-winding motor control method and device

Abstract

The embodiment of the specification discloses a kind of electric aircraft double-winding motor control methods, the method includes: the double-winding motor of electric aircraft enters double-winding operation mode, the running condition of the double-winding motor is monitored;When judging that the double-winding motor meets single-winding access condition, the double-winding motor is switched to single-winding operation mode;After switching to single-winding operation mode, it is monitored whether single-winding access condition is reached;If single-winding access condition is reached, the next operation mode is determined according to the current running information of the double-winding motor, and the double-winding motor is switched to the next operation mode.

Description

Technical Field

[0001] This application relates to the field of aviation electric propulsion technology, and in particular to a control method and device for a dual-winding motor of an electric aircraft. Background Technology

[0002] Currently, dual three-phase permanent magnet synchronous motors are already used in electric aircraft. Dual three-phase motors have two sets of independently operating stator windings, improving the overall redundancy of the motor. However, the two sets of windings in a dual three-phase permanent magnet synchronous motor may experience deviations and inconsistencies in their physical and electrical properties during design, production, and use. These inconsistencies may lead to differences in the electrical properties and temperature rise characteristics of the two sets of windings.

[0003] In the existing technology, the utilization of redundancy in dual three-phase permanent magnet synchronous motors is still insufficient, and it is not possible to independently control the two sets of windings of the motor during aircraft flight missions. Summary of the Invention

[0004] This specification provides a method and apparatus for controlling a dual-winding motor in an electric aircraft, which solves the technical problem of how to independently control the two sets of windings of a dual-winding motor.

[0005] To address the aforementioned technical problems, the embodiments in this specification provide the following technical solutions: This specification provides an embodiment of a control method for a dual-winding motor in an electric aircraft, the method comprising: After the dual-winding motor of the electric aircraft enters the dual-winding operation mode, the operation of the dual-winding motor is monitored; when it is determined that the dual-winding motor meets the single-winding access conditions, the dual-winding motor is switched to the single-winding operation mode. After switching to single-winding operation mode, monitor whether the single-winding exit condition is met; If the single-winding exit condition is met, the next operating mode is determined based on the current operating information of the dual-winding motor, and the dual-winding motor is switched to the next operating mode.

[0006] Preferably, monitoring the operation of the dual-winding motor includes: When the operation of the dual-winding motor of the electric aircraft in dual-winding mode enters the warning range, a judgment mechanism is activated to determine whether the dual-winding motor meets the single-winding access conditions.

[0007] Preferably, determining whether the dual-winding motor meets the single-winding access criteria according to the judgment mechanism includes: For any parameter of interest in a dual-winding motor, when the value of the parameter of interest enters the warning range, the duration and magnitude of change of the value of the parameter of interest within the warning range are monitored; Based on whether the duration and change amplitude meet preset conditions, it is determined whether the dual-winding motor meets the single-winding access conditions.

[0008] Preferably, determining whether the dual-winding motor meets the single-winding access criteria includes: Determine if the dual-winding motor has encountered a specific abnormal situation and / or received a specific instruction.

[0009] Preferably, determining whether the dual-winding motor meets the single-winding access criteria includes: Determine if a specific abnormal condition occurs in the dual-winding motor; wherein the specific abnormal condition includes one or more of the following: abnormal current, abnormal winding temperature, and abnormal power device temperature.

[0010] Preferably, switching the dual-winding motor to single-winding operation mode includes: Based on the status information of the dual windings, the available windings and unavailable windings are determined, and the available windings are kept running while the unavailable windings are stopped.

[0011] Preferably, after switching to single-winding operation mode, the method further includes: Determine whether the actual speed of the motor in single-winding operation mode is consistent with the reference speed; wherein, the reference speed is determined according to the instructions transmitted from the host computer; If there is a discrepancy, a report is sent to the host computer, which is used to characterize the actual rotational speed of the winding that is still in operation.

[0012] As a preferred method, monitoring whether the single-winding clearance condition is met includes: Monitor the operating information of the dual-winding motor and determine whether the single-winding exit condition has been met based on the operating information.

[0013] Preferably, the next operating mode includes a dual-winding operating mode or a fault mode.

[0014] This specification provides an embodiment of a dual-winding motor control device for an electric aircraft, the device comprising: The access module is used to monitor the operation of the dual-winding motor after it enters the dual-winding operation mode; when it is determined that the dual-winding motor meets the single-winding access conditions, it switches the dual-winding motor to the single-winding operation mode. The exit module is used to monitor whether the single-winding exit condition is met after switching to the single-winding operation mode; if the single-winding exit condition is met, the next operation mode is determined according to the current operation information of the dual-winding motor, and the dual-winding motor is switched to the next operation mode.

[0015] The above-described at least one technical solution adopted in the embodiments of this specification can achieve the following beneficial effects: The above technical solution proposes a dual-winding motor configuration and control strategy, which enables independent control of a single winding of the dual-winding motor, realizing the rational utilization of the motor's dual redundancy, thereby improving the reliability of electric aircraft. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this specification or the prior art, the drawings used in the description of the embodiments of this specification or the prior art will be briefly described below. Obviously, the drawings used in some embodiments of this application are only described below. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a flowchart illustrating the control method for a dual-winding motor of an electric aircraft provided in the first embodiment of this specification.

[0018] Figure 2 This is a schematic diagram of the architecture of a dual-winding motor.

[0019] Figure 3 This is a schematic diagram of the control principle of the dual-winding motor in the first embodiment of this specification.

[0020] Figure 4 This is a schematic diagram of the single-winding operation mode in the first embodiment of this specification.

[0021] Figure 5 This is a schematic diagram of the control process of a dual-winding motor in the first embodiment of this specification.

[0022] Figure 6 This is a schematic diagram of a mode switching in the first embodiment of this specification. Detailed Implementation

[0023] To enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments involved in the specific implementation are only a part of the embodiments of this application, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments in the specific implementation without creative effort should fall within the protection scope of this application.

[0024] The first embodiment of this specification (hereinafter referred to as "Embodiment 1") provides a control method for a dual-winding motor of an electric aircraft. The executing entity of Embodiment 1 includes, but is not limited to, a terminal, a server, an operating system, or an application program; that is, the executing entity can be diverse and can be set, used, or changed as needed. Alternatively, a third-party application program can assist the executing entity in executing Embodiment 1. For example, a server can execute the dual-winding motor control method for an electric aircraft in Embodiment 1, and a corresponding application program can be installed on a terminal (which may be held by a user). Data transmission can occur between the terminal or application program and the server, thereby assisting the server in executing the dual-winding motor control method for an electric aircraft in Embodiment 1.

[0025] refer to Figure 1 The electric aircraft dual-winding motor control method provided in Example 1 includes: S101: After the dual-winding motor of the electric aircraft enters the dual-winding operation mode, the operation status of the dual-winding motor is monitored; when it is determined that the dual-winding motor meets the single-winding access conditions, the dual-winding motor is switched to the single-winding operation mode. refer to Figure 2 The architecture of the dual-winding motor includes a dual three-phase permanent magnet synchronous motor and a six-phase power half-bridge. The motor control system directly controls the six-phase power half-bridge, thereby controlling the motor. Specifically, it includes: 1. One power battery provides energy for two sets of three-phase inverters; 2. A set of dual three-phase permanent magnet synchronous motors, including two sets of three-phase windings and one rotor; 2. Two sets of three-phase inverters are respectively connected to the two sets of windings of the dual three-phase permanent magnet synchronous motor to provide three-phase power to the motor; 3. The motor control system includes two independently operating gate drives, each driving a three-phase inverter; 4. Each gate drive can have multiple independent gate drive chips / units; each independent gate drive chip / unit can drive one of the six bridge arms of a three-phase inverter or can simultaneously drive a group of upper and lower bridge arms.

[0026] Electric propulsion systems in electric aircraft typically control the speed of their motors. This speed control drives the propeller to rotate at a stable speed, generating the thrust and lift required by the aircraft. Such a motor control loop usually includes a speed loop and a current loop. The speed loop calculates the torque and matching current command required by the electronic control unit (ECU) based on the commanded speed and the actual motor speed. The current loop then calculates the voltage value that the ECU should output based on this current command. The current loop's task is to perform closed-loop control of the motor's current. The control reference current for the current loop is the d-axis and q-axis reference current obtained from the speed loop's control and calculation. The feedback current for the current loop is obtained from the current sensor located in the motor controller, sampled via an ADC. The Clarke-Park converter module in the current loop transforms the two sets of sampled three-phase currents into two sets of d- and q-axis feedback currents. The Clarke-Park converter requires electrical angles as input. At this point, current controllers #1 and #2 can perform PI control based on the d- and q-axis reference and feedback currents. The output of the PI control is two sets of d- and q-axis voltage commands. These two sets of d-axis and q-axis voltage commands are then subjected to an inverse Clarke-Park transformation to obtain two sets of three-phase voltage commands. After modulation ratio calculation, such as space vector modulation, the corresponding two sets of three-phase duty cycle commands are obtained. The relevant hardware of the main controller converts the duty cycle into a fixed-frequency PWM.

[0027] In the control process of a motor with dual winding redundancy, two current loops are included in order to provide the required voltage to the two windings (see reference). Figure 3 (See the section on "High-Frequency Tasks, Interrupt Triggers"). The current commands for these two current loops should be distributed by the speed loop, and in general designs, they are distributed evenly.

[0028] In Example 1, after the dual-winding motor of the electric aircraft starts running, the executing entity in Example 1 will control the dual-winding motor to operate in dual-winding mode. In dual-winding mode, both windings of the dual-winding motor output power normally.

[0029] After the dual-winding motor enters the dual-winding operation mode, the execution unit in Embodiment 1 continuously monitors the operation of the dual-winding motor. When it is determined that the dual-winding motor meets the single-winding access conditions, the execution unit in Embodiment 1 switches the dual-winding motor to the single-winding operation mode.

[0030] Preferably, monitoring the operation of the dual-winding motor of the electric aircraft in dual-winding operation mode includes: when the operation of the dual-winding motor of the electric aircraft in dual-winding operation mode enters the warning range, a judgment mechanism is activated, and the judgment mechanism is used to determine whether the dual-winding motor meets the single-winding access conditions.

[0031] Specifically, certain parameters of a dual-winding motor can be selected as parameters of interest. These parameters characterize the motor's operation, such as current, winding temperature, and power device temperature. A corresponding threshold is set for each parameter of interest, and a reasonable relative difference (positive or negative) is established around this threshold. Values ​​above or below the threshold trigger an alarm. For example, if the threshold for a certain parameter is A, values ​​above or below A trigger an alarm. Furthermore, corresponding relative differences are set for each threshold. Again, using a threshold of A as an example, the relative differences are A+a and Aa (where a is a positive number).

[0032] When the dual-winding motor is running in dual-winding operation mode, the values ​​of these parameters of interest are monitored. For any parameter, when the current value of that parameter falls into its corresponding warning range, a judgment mechanism is activated to determine whether the dual-winding motor meets the single-winding access conditions.

[0033] Preferably, the determination of whether a dual-winding motor meets the single-winding access conditions according to the judgment mechanism includes: for any parameter of interest of the dual-winding motor, when the value of the parameter of interest enters the warning range, monitoring the duration and change range of the value of the parameter of interest within the warning range; and determining whether the dual-winding motor meets the single-winding access conditions based on whether the duration and change range meet preset conditions.

[0034] In other words, it's not enough to simply check if the value falls within the warning range; the duration and magnitude of change within that range are also considered. For any parameter of interest in a dual-winding motor, when its value enters its corresponding warning range, the duration and magnitude of change of that parameter of interest within that range are monitored. If the duration meets a preset condition (i.e., a time-related preset condition, such as reaching a certain duration), and the magnitude of change meets a preset condition (i.e., a value-related preset condition, specifically entering the warning range and reaching or exceeding a certain relative difference), then the dual-winding motor is deemed to meet the single-winding access condition. If the duration or magnitude of change does not meet the preset conditions, then the dual-winding motor is deemed not to meet the single-winding access condition. The magnitude of change is further explained below: Taking a threshold A corresponding to a certain parameter as an example, if the value of the parameter enters the warning range because it is lower than A, the preset condition is met when the change reaches or exceeds Aa; if the value of the parameter enters the warning range because it is higher than A, the preset condition is met when the change reaches or exceeds A+a.

[0035] In Example 1, when a dual-winding motor is determined to meet the single-winding access conditions, it means that the dual-winding motor is already in an abnormal operating state and a specific abnormal situation has occurred. For example, when the values ​​of current / winding temperature / power device temperature enter the corresponding warning range and the duration reaches a preset time condition, it indicates that there is an abnormal current or an over-threshold / winding temperature or power device temperature (these are all specific abnormal situations). Therefore, determining that a dual-winding motor meets the single-winding access conditions can actually be considered as determining that the dual-winding motor has experienced a specific abnormal situation.

[0036] In addition, other entities exist on the aircraft, such as the flight control computer, which can also play a role in controlling the dual-winding motor. These entities can send specific instructions to the execution entity in Embodiment 1. After receiving the specific instructions, the execution entity in Embodiment 1 determines that the dual-winding motor meets the single-winding access conditions.

[0037] As can be seen from the above, determining whether the dual-winding motor meets the single-winding access conditions may include: determining whether the dual-winding motor has experienced a specific abnormal situation and / or received a specific instruction.

[0038] In Example 1, when the dual-winding motor is determined to meet the single-winding access conditions, it switches to single-winding operation mode. In single-winding operation mode, only one winding outputs power, for example... Figure 4 As shown.

[0039] Preferably, switching a dual-winding motor to single-winding operation mode may include: determining the available and unavailable windings based on the status information of the dual windings, and keeping the available windings running while stopping the unavailable windings. For example, it can be determined which specific winding exhibited the aforementioned specific abnormal condition, and then designating the winding exhibiting the specific abnormal condition as the unavailable winding, and the winding that did not exhibit the specific abnormal condition as the available winding. Alternatively, the available and unavailable windings can be determined based on a specific instruction received.

[0040] Example 1 indicates that the speed (referred to as the reference speed) that the dual-winding motor should reach in dual-winding operation mode is controlled by a host computer (including but not limited to a flight control computer). Specifically, the host computer sends commands to the execution entity in Example 1, which then causes the dual-winding motor to rotate at the reference speed specified in the command. In single-winding operation mode, due to the reduced power output capability of the motor, the upper limit of the speed of the aircraft's power unit (such as a propeller or ducted fan) driven by the motor is also reduced. Therefore, under some operating conditions, the actual motor speed may differ from the reference speed in the command. The execution entity in Example 1 can characterize or describe the actual achievable speed of the motor and report it to the host computer. To this end, various operating conditions under various operating modes of the dual-winding motor (including dual-winding and single-winding operation modes) can be calibrated in advance. Calibration methods include, but are not limited to, simulation, experimentation, and fitting. In practical applications, the executing entity of Example 1 calculates the achievable speed range based on the actual power output capability of the single winding in the single winding operation mode, thereby characterizing or describing the actual speed that the motor can achieve.

[0041] Based on this, after switching to single-winding operation mode, it can be determined whether the actual speed of the motor in single-winding operation mode is consistent with the reference speed; wherein, the reference speed is determined according to the instructions transmitted by the host computer.

[0042] If the actual speed of the motor is inconsistent with the reference speed in single-winding operation mode, a report information is sent to the host computer. The report information is used to characterize the actual speed of the winding that is still in operation.

[0043] The host computer can take relevant actions based on the report information, such as sending instructions to the execution subject of Embodiment 1 to adjust the reference speed to the preset speed range in the single winding operation mode.

[0044] S103: After switching to single-winding operation mode, monitor whether the single-winding exit condition is met; In Example 1, after switching to single-winding operation mode, continuous monitoring is performed to determine whether the single-winding exit condition has been met. Monitoring the single-winding exit condition may include: monitoring the operating information of the dual-winding motor and determining whether the single-winding exit condition has been met based on the operating information.

[0045] In practice, after switching to single-winding operation mode, the operating information of a dual-winding motor may change during operation. For example, the status information of each winding may change, such as a non-abnormal winding becoming abnormal, the abnormality worsening (e.g., parameters exceeding a larger threshold), or the abnormal winding returning to normal. Additionally, specific abnormalities of the motor may disappear or return to normal, or new specific abnormalities may appear or worsen (e.g., parameters exceeding a larger threshold).

[0046] In Example 1, by continuously monitoring the operating information of the dual-winding motor, it can be determined whether the single-winding exit condition has been met.

[0047] S105: If the single-winding exit condition is met, then the next operating mode is determined based on the current operating information of the dual-winding motor, and the dual-winding motor is switched to the next operating mode.

[0048] In Example 1, if the single-winding exit condition is met, the next operating mode is determined based on the current operating information of the dual-winding motor.

[0049] As mentioned above, the operating information of a dual-winding motor may change after switching to single-winding operation mode. If the single-winding exit condition is met, the specific operating mode to switch to can be determined based on the current operating information of the dual-winding motor, thus determining the next operating mode.

[0050] Preferably, the next operating mode includes a dual-winding operating mode or a fault mode.

[0051] Preferably, after switching to single-winding operation mode, if the operation information of the dual-winding motor indicates the appearance of a new specific abnormality, the aggravation of the specific abnormality, or the transformation of a non-abnormal winding into an abnormal one, or the aggravation of the winding abnormality, then the next operation mode can be the fault mode; if the operation information of the dual-winding motor indicates the disappearance of the specific abnormality, the restoration to normal, or the restoration of the abnormal winding to normal, then the next operation mode can be the dual-winding operation mode.

[0052] Once the next operating mode is determined, the dual-winding motor can be switched to that mode. For example, if the next operating mode is dual-winding operation, the dual-winding motor will resume dual-winding operation, with both sets of windings working normally and the motor rotating normally; if the next operating mode is fault mode, the dual-winding motor will stop operating.

[0053] The following is combined with Figure 5 Example 1 is described below: The dual-winding motor enters normal operation mode (i.e., dual-winding operation mode) based on external commands (i.e., external commands from the electronic control system). If any single winding malfunctions, it enters single-winding operation mode. If the malfunction worsens, it enters fault mode (i.e., fault shutdown). If operation returns to normal, it enters normal operation mode.

[0054] Alternatively, it can switch between modes based on external commands.

[0055] The following is combined with Figure 6 Example 1 is described below: Figure 6 The document demonstrates two scenarios: a motor winding temperature rises to meet the single-winding access conditions, enters single-winding operation mode, and then transitions from single-winding operation mode to fault mode; and a motor winding temperature decreases to transition from single-winding operation mode to normal operation mode.

[0056] Figure 6 In the process, if the temperature of one winding exceeds the threshold Ts1, it enters the warning range, and the judgment mechanism is activated. After the cumulative over-temperature time T1 exceeds a certain threshold (meeting preset conditions) and the over-temperature amplitude Δt1 exceeds a certain threshold (i.e., reaching or exceeding a certain relative difference, meeting preset conditions), and the single-winding access condition is met, the dual-winding motor switches to single-winding operation mode. The execution entity in Example 1 can calculate the... using the computation interval time and a very small amount of buffer. Figure 6 The area of ​​the gray region corresponding to T1 and Δt1 can be used as the basis for determining whether the single winding access conditions are met.

[0057] In one scenario, when the winding temperature continues to rise and exceeds the threshold Ts2, the judgment mechanism begins to calculate. After the cumulative over-temperature time T2 (meeting the preset time condition) and Δt2 exceed a certain threshold (i.e., reaching or exceeding a certain relative difference, meeting the preset condition), the single winding exit condition is met, and the fault mode is entered.

[0058] In another scenario, if the winding temperature drops below the threshold Ts1 from its initial value, no action will be taken. If it continues to drop below the threshold Ts3, the judgment mechanism will start calculating. After the cumulative time T3 (meeting the preset time condition) and Δt3 exceed a certain threshold (i.e., reaching or exceeding a certain relative difference, meeting the preset condition), the single winding exit condition will be met, and the dual winding operation mode will be entered.

[0059] The values ​​of the parameters and motor status information involved in Example 1 can be collected or fed back by sensors of the motor or aircraft, or obtained through information transmitted from the host computer. Example 1 is not limited to these parameters.

[0060] The execution entity in Embodiment 1 can be the controller of the dual-winding motor or the processor of the controller (e.g., Figure 3 The dark shaded area in the image includes the speed loop calculation, state machine, and some sensor data acquisition. The execution unit of Embodiment 1 is deployed with corresponding control software (or motor control software). This control software can control the dual-winding and single-winding operation states using a single set of state machine code. Therefore, the execution unit of Embodiment 1 can independently enable two sets of gate drives, thereby independently driving two sets of inverters and motor windings. For example, a processing module can be added to the speed loop section of the control software to control the operation enable of the two windings based on the current, temperature, and other state information of the two windings. The torque distribution module should be placed in the low-frequency tasks of the software along with the speed loop. If there is interference in the acquisition link, the acquired temperature and current signals can be processed through low-pass filtering to prevent erroneous operation of the operation enable. Furthermore, the main body of the control software is generally a microprocessor-based embedded system (with or without an operating system). Other possible operating platforms for running the control software include terminals or servers with control cards, or PLC-like platforms. The upstream entities of the control software can be other embedded systems, terminals, servers, etc., and these upstream entities can also run the control software.

[0061] Example 1 can achieve the following beneficial effects: Example 1 proposes a dual-winding motor dual-winding allocation and control strategy, which can independently and rationally control each winding of the dual-winding motor, realize the rational utilization of the motor's dual redundancy, and enable the electric aircraft's power motor to have a reliable single-phase and three-phase operation mechanism, which can enhance the safety and reliability of the aircraft's power system, thereby improving the reliability of the electric aircraft.

[0062] Example 1 addresses the control of a permanent magnet synchronous motor with dual windings, providing a specific dual-winding configuration strategy and a suitable overall motor control system. This control strategy enhances the reliability of the electric propulsion system. Example 1 can be applied to electric drive systems with dual-winding redundancy in electric aircraft, representing an innovation in electric drive system control.

[0063] In Example 1, the determination of single-winding access conditions employs a combination of warning range, duration, and amplitude of change. This achieves a hysteresis design, ensuring a reasonable relative difference between the thresholds used. Compared to relying solely on threshold judgment, this prevents frequent mode switching and state uncertainty near the threshold, further improving motor control performance and efficiency.

[0064] The second embodiment of this specification provides a dual-winding motor control device for an electric aircraft corresponding to the method described in Embodiment 1. The device includes: The access module is used to monitor the operation of the dual-winding motor after it enters the dual-winding operation mode; when it is determined that the dual-winding motor meets the single-winding access conditions, it switches the dual-winding motor to the single-winding operation mode. The exit module is used to monitor whether the single-winding exit condition is met after switching to the single-winding operation mode; if the single-winding exit condition is met, the next operation mode is determined according to the current operation information of the dual-winding motor, and the dual-winding motor is switched to the next operation mode.

[0065] Preferably, monitoring the operation of the dual-winding motor includes: When the operation of the dual-winding motor of the electric aircraft in dual-winding mode enters the warning range, a judgment mechanism is activated to determine whether the dual-winding motor meets the single-winding access conditions.

[0066] Preferably, determining whether the dual-winding motor meets the single-winding access criteria according to the judgment mechanism includes: For any parameter of interest in a dual-winding motor, when the value of the parameter of interest enters the warning range, the duration and magnitude of change of the value of the parameter of interest within the warning range are monitored; Based on whether the duration and change amplitude meet preset conditions, it is determined whether the dual-winding motor meets the single-winding access conditions.

[0067] Preferably, determining whether the dual-winding motor meets the single-winding access criteria includes: Determine if the dual-winding motor has encountered a specific abnormal situation and / or received a specific instruction.

[0068] Preferably, determining whether the dual-winding motor meets the single-winding access criteria includes: Determine if a specific abnormal condition occurs in the dual-winding motor; wherein the specific abnormal condition includes one or more of the following: abnormal current, abnormal winding temperature, and abnormal power device temperature.

[0069] Preferably, switching the dual-winding motor to single-winding operation mode includes: Based on the status information of the dual windings, the available windings and unavailable windings are determined, and the available windings are kept running while the unavailable windings are stopped.

[0070] Preferably, the access module is further configured to: determine whether the actual speed of the motor in the single-winding operation mode is consistent with the reference speed after switching to the single-winding operation mode; wherein the reference speed is determined according to the instructions transmitted by the host computer; If there is a discrepancy, a report is sent to the host computer, which is used to characterize the actual rotational speed of the winding that is still in operation.

[0071] As a preferred method, monitoring whether the single-winding clearance condition is met includes: Monitor the operating information of the dual-winding motor and determine whether the single-winding exit condition has been met based on the operating information.

[0072] Preferably, the next operating mode includes a dual-winding operating mode or a fault mode.

[0073] The contents not described in detail in Embodiment 1 and Embodiment 2 can be referred to each other. Embodiment 2 can achieve the same beneficial effects as Embodiment 1. The above embodiments can be used in combination.

[0074] The above description is merely an embodiment of this specification and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this application should be included within the scope of the claims of this application.

Claims

1. A control method for a dual-winding motor in an electric aircraft, characterized in that, The method includes: After the dual-winding motor of the electric aircraft enters the dual-winding operation mode, the operation of the dual-winding motor is monitored; when it is determined that the dual-winding motor meets the single-winding access conditions, the dual-winding motor is switched to the single-winding operation mode. After switching to single-winding operation mode, monitor whether the single-winding exit condition is met; If the single-winding exit condition is met, the next operating mode is determined based on the current operating information of the dual-winding motor, and the dual-winding motor is switched to the next operating mode.

2. The method as described in claim 1, characterized in that, Monitoring the operation of the dual-winding motor includes: When the operation of the dual-winding motor of the electric aircraft in dual-winding mode enters the warning range, a judgment mechanism is activated to determine whether the dual-winding motor meets the single-winding access conditions.

3. The method as described in claim 2, characterized in that, Determining whether the dual-winding motor meets the single-winding access criteria based on the aforementioned judgment mechanism includes: For any parameter of interest in a dual-winding motor, when the value of the parameter of interest enters the warning range, the duration and magnitude of change of the value of the parameter of interest within the warning range are monitored; Based on whether the duration and change amplitude meet preset conditions, it is determined whether the dual-winding motor meets the single-winding access conditions.

4. The method according to any one of claims 1 to 3, characterized in that, Determining whether the dual-winding motor meets the single-winding access criteria includes: Determine if the dual-winding motor has encountered a specific abnormal situation and / or received a specific instruction.

5. The method as described in claim 1, characterized in that, Determining whether the dual-winding motor meets the single-winding access criteria includes: Determine if a specific abnormal condition occurs in the dual-winding motor; wherein the specific abnormal condition includes one or more of the following: abnormal current, abnormal winding temperature, and abnormal power device temperature.

6. The method as described in claim 1, characterized in that, Switching the dual-winding motor to single-winding operation mode includes: Based on the status information of the dual windings, the available windings and unavailable windings are determined, and the available windings are kept running while the unavailable windings are stopped.

7. The method as described in claim 1, characterized in that, After switching to single-winding operation mode, the method further includes: Determine whether the actual speed of the motor in single-winding operation mode is consistent with the reference speed; wherein, the reference speed is determined according to the instructions transmitted from the host computer; If there is a discrepancy, a report is sent to the host computer, which is used to characterize the actual rotational speed of the winding that is still in operation.

8. The method as described in claim 1, characterized in that, Monitoring whether the single-winding clearance condition is met includes: Monitor the operating information of the dual-winding motor and determine whether the single-winding exit condition has been met based on the operating information.

9. The method as described in claim 1, characterized in that, The next operating mode includes either a dual-winding operating mode or a fault mode.

10. A control device for a dual-winding motor of an electric aircraft, characterized in that, The device includes: The access module is used to monitor the operation of the dual-winding motor after it enters the dual-winding operation mode; when it is determined that the dual-winding motor meets the single-winding access conditions, it switches the dual-winding motor to the single-winding operation mode. The exit module is used to monitor whether the single-winding exit condition is met after switching to the single-winding operation mode; if the single-winding exit condition is met, the next operation mode is determined according to the current operation information of the dual-winding motor, and the dual-winding motor is switched to the next operation mode.

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