Cooling control method and related device of electric engine

Abstract

The present application provides a cooling control method and related device for an electric engine, wherein a motor controller is integrated inside a power motor, the power motor includes a first heat generating component and a bracket assembly having a liquid cooling chamber, the first heat generating component is arranged in the liquid cooling chamber; the motor controller includes a second heat generating component, the second heat generating component is arranged close to a cooling plate; the cooling medium flowing through the liquid cooling chamber and the cooling plate is different; the cooling control method includes: obtaining a first component temperature of the first heat generating component and a second component temperature of the second heat generating component, and regulating the flow of the cooling medium flowing through the liquid cooling chamber and the cooling plate according to the first component temperature and / or the second component temperature, so as to independently control the cooling of the power motor and the motor controller. Based on multiple indicators, the flow of the cooling medium flowing through the liquid cooling chamber and the cooling plate is precisely regulated to meet the cooling requirements of different heat generating components, thereby improving the cooling efficiency, the performance and efficiency of the electric engine.

Description

Technical Field

[0001] The present application relates to the field of aircraft technology, and in particular to a cooling control method and related devices for an electric engine. Background Art

[0002] The electric engine of the aircraft provides torque for the propeller and thus provides propulsion power for the aircraft. The temperature of the electric engine increases with the increase of output power due to the influence of ambient temperature, power demand within the flight envelope of the aircraft and power demand in emergency state. In order to improve the working efficiency of the electric engine and prolong the duration of peak power, the working temperature of the electric engine is maintained in a suitable range by designing a cooling circuit.

[0003] In the related art, the flow rate of the coolant in the cooling circuit of the electric engine is controlled by controlling the speed of the circulating pump, thereby controlling the cooling effect. Specifically, the required coolant flow rates of the components to be cooled are calculated respectively, and the largest required coolant flow rate is selected as the required coolant flow rate. The speed of the circulating pump is controlled according to the required coolant flow rate.

[0004] However, the above technology has the problem of limited cooling efficiency, and the cooling efficiency of current aircraft is relatively low. Summary of the invention

[0005] The present application provides a cooling control method and related devices for an electric engine, which are used to solve the problem that the cooling efficiency of related technologies is limited and the cooling efficiency of current aircraft is relatively low.

[0006] In a first aspect, the present application provides a cooling control method for an electric engine, which is used to control the cooling of an electric engine included in an aircraft, wherein the electric engine includes a power motor and a motor controller, the motor controller is integrated inside the power motor, the power motor includes a first heat-generating component and a bracket assembly having a liquid cooling cavity, the first heat-generating component is arranged in the liquid cooling cavity; the motor controller includes a second heat-generating component, and the second heat-generating component is arranged close to a cooling plate; a cooling medium flows through the liquid cooling cavity and the cooling plate respectively through different branches; the cooling control method includes:

[0007] Acquire a first component temperature of a first heat-generating component and / or a second component temperature of a second heat-generating component;

[0008] According to the temperature of the first component and / or the temperature of the second component, the flow rate of the cooling medium flowing through the liquid cooling cavity and the flow rate of the cooling medium flowing through the cooling plate are regulated to independently control the cooling of the power motor and the motor controller.

[0009] In a possible implementation, regulating the flow rate of the cooling medium flowing through the liquid cooling cavity and the flow rate of the cooling medium flowing through the cooling plate according to the temperature of the first component and / or the temperature of the second component includes:

[0010] Matching a target temperature condition corresponding to the first component temperature and / or the second component temperature among a plurality of temperature conditions applicable to the electric engine, wherein different flow distribution ratios corresponding to different temperature conditions are different;

[0011] If a target temperature condition corresponding to the temperature of the first component and / or the temperature of the second component is matched, the flow rate of the cooling medium flowing through the liquid cooling cavity and the flow rate of the cooling medium flowing through the cooling plate are regulated based on the flow distribution ratio corresponding to the target temperature condition.

[0012] In a possible implementation manner, the cooling control method further includes:

[0013] When the target temperature condition corresponding to the first component temperature and / or the second component temperature is not matched, determining, for each of the plurality of temperature conditions, a matching degree between the temperature condition and the first component temperature and / or the second component temperature;

[0014] Selecting a temperature condition corresponding to a maximum matching degree as a target temperature condition corresponding to the temperature of the first component and / or the temperature of the second component;

[0015] Based on the flow distribution ratio corresponding to the target temperature condition, the flow rate of the cooling medium flowing through the liquid cooling cavity and the flow rate of the cooling medium flowing through the cooling plate are regulated.

[0016] In a possible implementation, the cooling control method further includes: when the target temperature condition corresponding to the first component temperature and / or the second component temperature is not matched, controlling the cooling medium flow rate flowing through the liquid cooling chamber to be greater than the cooling medium flow rate flowing through the cooling plate.

[0017] In a possible implementation, a flow channel control valve is integrated in the motor controller, and the flow channel control valve is used to control the flow rate of the cooling medium flowing through the liquid cooling chamber and the flow rate of the cooling medium flowing through the cooling plate. Before obtaining the temperature of the first component and the temperature of the second component, the cooling control method further includes:

[0018] Monitor the working status of the flow control valve, which includes normal working status, power-off status and failure status;

[0019] Determine that the working state of the flow channel control valve is a normal working state;

[0020] According to the temperature of the first component and / or the temperature of the second component, the flow rate of the cooling medium flowing through the liquid cooling cavity and the flow rate of the cooling medium flowing through the cooling plate are regulated, including: according to the temperature of the first component and / or the temperature of the second component, the opening of the flow channel control valve is regulated to regulate the flow rate of the cooling medium flowing through the liquid cooling cavity and the flow rate of the cooling medium flowing through the cooling plate.

[0021] In a possible implementation manner, the cooling control method further includes:

[0022] When the flow channel control valve is in a non-powered state or a failed state, the flow rate of the cooling medium flowing through the liquid cooling cavity is controlled to be greater than the flow rate of the cooling medium flowing through the cooling plate.

[0023] In a possible implementation, a flow channel control valve is integrated in the motor controller, and the flow channel control valve is used to control the flow rate of the cooling medium flowing through the liquid cooling cavity and the flow rate of the cooling medium flowing through the cooling plate. The flow channel control valve is a dual-redundancy configuration, and the flow rate of the cooling medium flowing through the liquid cooling cavity and the flow rate of the cooling medium flowing through the cooling plate are regulated according to the temperature of the first component and / or the temperature of the second component, including:

[0024] Monitor the working state of the flow control valve with dual redundancy configuration, the working state includes the normal working state;

[0025] Determine the target flow path control valve in normal working condition;

[0026] The flow rate of the cooling medium flowing through the liquid cooling cavity and the flow rate of the cooling medium flowing through the cooling plate are regulated according to the temperature of the first component and / or the temperature of the second component.

[0027] In a possible implementation manner, the multiple temperature conditions are determined at least according to the flow area of ​​the liquid supply port of the liquid cooling chamber and the number of the liquid supply ports.

[0028] In a possible implementation, the cooling control method further includes: sending the first component temperature, the second component temperature and the working status of the target component to a flight control system, the flight control system being used to remotely monitor the electric engine, and the target component comprising at least one of a flow control valve integrated in a motor controller, a circulating pump in a cooling system of the electric engine and a heat dissipation component.

[0029] In a possible implementation, the heat dissipation component includes a fan.

[0030] In a second aspect, the present application provides a cooling control device for an electric engine, which is used to control the cooling of an electric engine included in an aircraft, wherein the electric engine includes a power motor and a motor controller, wherein the motor controller is integrated inside the power motor, and the power motor includes a first heat-generating component and a bracket assembly having a liquid cooling cavity, wherein the first heat-generating component is arranged in the liquid cooling cavity; the motor controller includes a second heat-generating component, and the second heat-generating component is arranged close to a cooling plate; a cooling medium flows through the liquid cooling cavity and the cooling plate respectively through different branches;

[0031] The cooling control unit includes:

[0032] An acquisition module: used for acquiring a first component temperature of a first heat-generating component and a second component temperature of a second heat-generating component;

[0033] The control module is used to adjust the cooling medium flow through the liquid cooling chamber and the cooling medium flow through the cooling plate according to the temperature of the first component and / or the temperature of the second component, so as to independently control the cooling of the power motor and the motor controller.

[0034] In a third aspect, the present application provides a control unit, comprising: a processor, and a memory communicatively connected to the processor;

[0035] Memory for storing computer-executable instructions;

[0036] The processor is used to execute the computer-executable instructions stored in the memory to implement the first aspect and / or various possible implementations of the first aspect as described above.

[0037] In a possible embodiment, the control unit is integrated into a motor controller included in the electric motor.

[0038] In a possible implementation, the motor controller is configured with dual redundancy.

[0039] In a fourth aspect, the present application provides a cooling system for an electric engine, the electric engine comprising a power motor and a motor controller, the motor controller being integrated inside the power motor;

[0040] The cooling system includes a flow channel, a first branch, a second branch, a flow channel control valve and a control unit as described in the third aspect, wherein the flow channel control valve is integrated inside the motor controller, and the cooling medium in the flow channel is diverted to the first branch and the second branch through the flow channel control valve. The flow channel control valve is used to control the flow rate of the cooling medium in the first branch and the second branch. The cooling medium flowing through the first branch is used to cool the motor controller, and the cooling medium flowing through the second branch is used to cool the power motor.

[0041] In a possible implementation, the cooling system of the electric engine further includes: a flight control system for monitoring the electric engine, and the flight control system is communicatively connected with the control unit.

[0042] In a fifth aspect, the present application provides a computer-readable storage medium, which stores computer-executable instructions. When the computer-executable instructions are executed, they are used to implement the above first aspect and / or various possible implementations of the first aspect.

[0043] In a sixth aspect, the present application provides a computer program product, including a computer program, which, when executed, implements the above first aspect and / or various possible implementations of the first aspect.

[0044] The electric engine cooling control method and related devices provided in the present application are used to control the cooling of the electric engine included in the aircraft, the electric engine includes a power motor and a motor controller, the motor controller is integrated inside the power motor, the power motor includes a first heat-generating component and a bracket assembly with a liquid cooling cavity, the first heat-generating component is arranged in the liquid cooling cavity; the motor controller includes a second heat-generating component, and the second heat-generating component is arranged close to the cooling plate; the cooling medium flowing through the liquid cooling cavity and the cooling plate is different; the cooling control method includes: obtaining a first component temperature of the first heat-generating component and a second component temperature of the second heat-generating component, and according to the first component temperature and / or the second component temperature, regulating the cooling medium flow rate flowing through the liquid cooling cavity and the cooling medium flow rate flowing through the cooling plate, so as to independently cool the power motor and the motor controller. The present application is based on multiple indicators to accurately control the cooling medium flow rate flowing through the liquid cooling chamber and the cooling medium flow rate flowing through the cooling plate, and adopts different cooling medium flow rates to dissipate heat for heat-generating components at different temperatures, so as to achieve efficient cooling of different heat-generating components through reasonable cooling medium flow rates, maximize the cooling needs of different heat-generating components, ensure that the power motor and motor controller are fully cooled, improve the cooling efficiency, and thus improve the operating efficiency of the electric engine; in addition, through efficient cooling, overheating of the power motor and motor controller is avoided, and the stable power output of the power engine is guaranteed, thereby improving the stability and reliability of the electric engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0046] Figure 1 A schematic diagram of a cooling control method for an electric engine provided by an exemplary embodiment of the present application;

[0047] Figure 2 A schematic flow chart of a cooling control method for an electric engine provided by an exemplary embodiment of the present application;

[0048] Figure 3 A schematic diagram of a temperature curve of a first component provided for an exemplary embodiment of the present application;

[0049] Figure 4 A schematic diagram of a temperature curve of a second component provided for an exemplary embodiment of the present application;

[0050] Figure 5 A schematic diagram of the structure of a control unit provided for an exemplary embodiment of the present application;

[0051] Figure 6 A schematic structural diagram of a cooling control device for an electric engine provided in accordance with an exemplary embodiment of the present application.

[0052] Reference numerals:

[0053] 11. flow channel; 12. first branch; 13. second branch; 14. flow channel control valve; 15. motor controller; 16. power motor; 17. circulation pump; 18. radiator; 19. control unit;

[0054] 60. Cooling control device for electric engine; 61. Acquisition module; 62. Control module.

[0055] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0056] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0057] In this application, unless otherwise clearly specified and limited, the terms "installation", "connection", "fixation" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, it can be a connection between two elements or an interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0058] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0059] In the above description, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0060] First, the terms involved in this application are explained:

[0061] Electric motor: A system consisting of an electric motor, motor controller, cables, etc. and its accessories that can convert electrical energy into mechanical energy.

[0062] Lift / thrust assembly: consists of an electric engine, propeller, etc. and their accessories.

[0063] Electric propulsion device: consists of power batteries, electric engines, propellers, etc. and their accessories.

[0064] In the related technology, the maximum coolant demand flow rate in the device to be cooled and the radiator is selected as the required coolant flow rate, and the circulating pump speed control target is obtained by looking up the table according to the required coolant flow rate. The circulating pump controls the coolant flow in the coolant pipeline according to the circulating pump speed control target. The coolant passes through the motor controller and the motor in turn, and finally flows into the radiator. The cooling control system of the vehicle's electric engine cooling circuit includes a temperature detection unit and a vehicle controller. The vehicle controller is connected to a water pump controller. The vehicle controller is preset with a radiator demand flow table, a flow speed table, and a demand flow table corresponding to each device to be cooled in the coolant pipeline. This technology can improve the cooling control effect of the electric engine cooling circuit and is suitable for the electric engine cooling system of electric vehicles.

[0065] However, the electric engine of an aircraft is highly integrated. Compared with electric vehicles, the electric engine cooling system is not connected to the on-board charger (OBC) controller and the DCDC converter cooling circuit. The traditional multi-system and multi-accessory electric engine dynamic cooling is not suitable for aviation electric engines (for example, electric engines of aircraft). In addition, the power devices of the high-voltage motor controller in the electric engine are preferably wide-bandgap power semiconductor modules, such as silicon carbide (SiC) and gallium nitride (GaN) semiconductors. Compared with traditional silicon-based power semiconductors (MOSFET and IGBT), wide-bandgap semiconductors have the characteristics of low loss and high efficiency, and have better electrical and thermal performance. Wide bandgap power semiconductor modules have lower heat generation and are suitable for high-voltage electric engines. In addition, the heat generation of the motor controller and the motor of the wide bandgap power semiconductor power module is quite different, resulting in different cooling requirements. If, according to the prior art, the coolant first flows into the motor controller to take away the heat of the power module, then flows into the motor to perform heat exchange on the motor stator winding, and finally flows into the radiator for heat dissipation, it is impossible to accurately cool the motor and motor controller with large differences in cooling requirements in the electric engine. To a certain extent, there is excessive cooling or incomplete cooling, resulting in low cooling efficiency of the electric engine cooling system and poor cooling control effect. The electric engine of the aircraft has high requirements on accuracy, reliability and safety. Therefore, the cooling control method of the prior art is not suitable for the electric engine of the aircraft.

[0066] In addition, many high-power heat-generating moving devices, such as the drive motors of new energy vehicles and the engines of fuel vehicles, generate a lot of heat during operation, so they are usually equipped with a cooling system (radiator and fan). The airflow generated by the fan blows through the radiator to take away the heat generated by the moving devices. For motors and engines such as automobiles, the heat dissipation is relatively spacious because of the structural layout and no rigid quality requirements. Therefore, in order to meet the heat dissipation requirements, there will not be too much research and development on the size of the radiator and the size of the fan, and usually the front end of the radiator will not be very tight and too much shielding. In order to meet the requirements of weight and layout space, the current electric vertical take-off and landing (eVTOL) aircraft usually requires the design of products to be small and precise, and to ensure the performance. In this way, the air inlet of the radiator will be blocked by the motor and pump. This layout will inevitably cause new problems that do not occur in other industries, such as uneven distribution of the air inlet, which will seriously cause a large amount of heat reflux in the middle area of ​​the radiator.

[0067] In order to solve the above technical problems, the present application proposes a cooling solution for an electric engine, which independently cools the power motor and the motor controller, and comprehensively considers the temperatures of the heat-generating components of the power motor and the motor controller, controls the flow rate of the cooling medium flowing through the liquid cooling chamber of the power motor and the flow rate of the cooling medium flowing through the cooling plate of the motor controller, so as to meet the different cooling requirements of the power motor and the motor controller, thereby optimizing the cooling efficiency and improving the operating efficiency of the electric engine.

[0068] The technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems are described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0069] Figure 1 A schematic diagram of a cooling control method for an electric engine provided by an exemplary embodiment of the present application. Figure 1 As shown, the cooling control method of the electric engine provided by the exemplary embodiment of the present application is applied in the cooling system of the electric engine of the aircraft, and the cooling system of the electric engine includes: a flow channel 11, a first branch 12, a second branch 13 and a flow channel control valve 14, the flow channel control valve 14 is integrated in the motor controller 15, the cooling medium in the flow channel 11 is divided into the first branch 12 and the second branch 13 through the flow channel control valve 14, the flow channel control valve 14 is used to control the flow rate of the cooling medium in the first branch 12 and the second branch 13, the cooling medium flowing through the first branch 12 is used to cool the motor controller 15, and the cooling medium flowing through the second branch 13 is used to cool the power motor 16. The cooling medium flowing out of the circulating pump 17 flows into the flow channel 11, and is divided into the first branch 12 and the second branch 13 through the flow channel control valve 14. The heat generating components of the motor controller 15 are arranged close to the cooling plate, and the other side of the cooling plate is a cooling flow channel, which is connected to the first branch 12. The cooling medium in the first branch 12 flows through the cooling plate, takes away the heat generated by the heat generating components of the motor controller 15, and realizes cooling of the motor controller 15. The cooling medium in the second branch 13 flows into the liquid cooling chamber of the power motor 16, takes away the heat generated by the heat generating components of the power motor 16, and cools the power motor 16. The high-temperature cooling medium flowing out of the two branches converges through the radiator 18 and flows back to the circulation pump 17, where the heat of the high-temperature cooling medium is discharged to the environment.

[0070] Temperature sensors are deployed on the motor controller 15 and the power motor 16 to collect the temperatures of the heat-generating components of the motor controller and the power motor. The control unit 19 regulates the flow of the cooling medium in the first branch 12 and the second branch 13 based on the temperature data on each temperature sensor and the conditions of the liquid supply ports on the liquid cooling chamber (such as the flow area and the number).

[0071] It should be noted that Figure 1 As just an example of a scenario, the location, form and number of the flow control valve 14 are just an example and are not limited in the embodiments of the present application. The control unit 19 can be a hardware control unit, such as a microcontroller, a programmable logic controller, etc.; it can be a software control unit, such as embedded software, a specific application software running on a microcontroller or other hardware platform; it can also be a dedicated control unit, such as a flight control computer, a microcomputer, etc. In addition, the control unit 19 can exist independently, or it can be integrated in the motor controller 15, or in other control units of the aircraft. The embodiments of the present application do not limit the location of the control unit and the form of the control unit.

[0072] In the present application, a cooling control method for an electric engine is used to control the cooling of an electric engine included in an aircraft, wherein the electric engine includes a power motor and a motor controller, wherein the motor controller is integrated inside the power motor, and wherein the power motor includes a first heat-generating component and a bracket assembly having a liquid cooling cavity, wherein the first heat-generating component is disposed in the liquid cooling cavity; wherein the motor controller includes a second heat-generating component, wherein the second heat-generating component is disposed close to a cooling plate; and wherein the cooling media flowing through the liquid cooling cavity and the cooling plate are different.

[0073] Among them, the motor controller is integrated inside the power motor, which can be understood as integrating the power motor and the motor controller in the same housing using a common shell design.

[0074] The support assembly in the power motor can also be called the housing of the power motor. The heat-generating components in the power motor mainly include the coil winding in the stator winding assembly. The coil winding is arranged in the liquid cooling cavity, that is, the first heat-generating component includes the coil winding. When the cooling medium flows into the liquid cooling cavity, it can take away the heat of the coil winding in the stator winding assembly to achieve heat dissipation of the coil winding. In addition, the cavity wall of the liquid cooling cavity has a liquid outlet and at least one liquid supply port. The liquid supply ports are arranged at intervals. The liquid supply port is used to supply the cooling medium to flow into the liquid cooling cavity, and the liquid outlet is used to supply the cooling medium in the liquid cooling cavity to flow out. For example, the second branch is connected to the liquid supply channel of the liquid cooling cavity through a bypass channel, and the liquid supply channel is connected to the liquid cooling cavity through the liquid supply port. The cooling medium flowing into the liquid supply port conducts heat to the single winding or multiple windings arranged in a circle through the annular cooling channel. The power motor can be designed as a single winding or multiple windings. That is to say, heat is conducted to a single winding or multiple windings arranged in a circular pattern through at least one annular cooling channel to take away the heat generated by the windings. The more liquid supply ports there are, the more annular cooling channels there are in the cooling cavity, the more uniform the heat dissipation of the coil windings is, and the better the heat dissipation effect is.

[0075] The heat-generating devices of the motor controller mainly include power devices, that is, the second heat-generating component includes power devices, the second heat-generating component is integrated on the cooling plate, or indirectly adhered to the outer surface of the tube wall of the cooling plate using heat-conductive material, and the other side of the cooling plate is a cooling channel. For example, the cooling channel is connected to the first branch, and the cooling medium in the first branch flows through the cooling plate, taking away the heat generated by the heat-generating component to achieve cooling of the motor controller.

[0076] Combine the following Figure 1 For application scenarios, refer to Figure 2 The cooling control method of the electric engine is described below. Figure 1 It should be noted that the above application scenarios are only shown to facilitate understanding of the spirit and principle of the present application, and the implementation of the present application is not limited to Figure 1 Limitations of the application scenario shown.

[0077] Figure 2 The following is a flow chart of a cooling control method for an electric engine provided by an exemplary embodiment of the present application. Figure 2 As shown, the cooling control method of the electric engine includes:

[0078] S201 , obtaining a first component temperature of a first heat-generating component and a second component temperature of a second heat-generating component.

[0079] Among them, the power motor is used to provide propulsion power for the aircraft. During the operation of the power motor, the motor winding generates a large amount of heat. The motor controller plays a vital role in the aircraft, especially in aircraft such as electric Vertical Take-Off and Landing (eVTOL) aircraft. It is used for power control, monitoring and adjusting the operating status of the motor, and communicating with the flight control system (such as the flight control computer). The heat-generating components in the motor controller mainly include the power devices corresponding to the motor controlled by the motor controller, for example, the power devices corresponding to the power motor, variable pitch motor and circulating pump motor respectively. The power devices are directly involved in the conversion and transmission of electric energy and generate a lot of heat.

[0080] For example, still refer to Figure 1 , by installing a sensor component on the power motor 16 and the heat generating component of the motor controller 15 to collect the real-time first component temperature of the first heat generating component and the real-time second component temperature of the second heat generating component, the sensor component is, for example, a temperature sensor such as a thermocouple, a thermistor, an infrared temperature sensor, and a semiconductor temperature sensor. For example, a temperature sensor is deployed on the stator winding component of the power motor 16; a temperature sensor is deployed on each power device in the motor controller 15.

[0081] The control unit 19 obtains the first component temperature of the first heat-generating component and the temperature of each power device from each sensing component. For example, the control unit 19 sends a request signal to the temperature sensor in real time or periodically, and the temperature sensor sends the collected first component temperature and the temperature of each power device to the control unit 19 through a specified communication protocol. For example, after the control unit obtains the temperature of each power device reported by multiple temperature sensors, it determines the maximum temperature among the temperatures of each power device as the second component temperature according to the control logic preset on the control unit.

[0082] S202: According to the temperature of the first component and / or the temperature of the second component, regulating the flow rate of the cooling medium flowing through the liquid cooling chamber and the flow rate of the cooling medium flowing through the cooling plate, so as to independently control the cooling of the power motor and the motor controller.

[0083] It can be understood that when the electric engine is working, the first component temperature of the first heat-generating component and the second component temperature of the second heat-generating component change dynamically, and thus the heat dissipation requirements of the first heat-generating component and the second heat-generating component change dynamically. For example, when the temperature of the first component is higher than the temperature of the second component, the cooling medium flow required by the first heat-generating component is greater than the cooling medium flow required by the second heat-generating component, or, when the second heat-generating component is over-temperature and the first heat-generating component is within a normal temperature range, the cooling medium flow required by the second heat-generating component is greater than the cooling medium flow required by the first heat-generating component, and so on.

[0084] Therefore, when regulating the flow rate of the cooling medium flowing through the liquid cooling chamber and the flow rate of the cooling medium flowing through the cooling plate, the heat dissipation requirements of each heat-generating component must be comprehensively considered.

[0085] Furthermore, the flow rate of the cooling medium flowing through the liquid cooling cavity and the flow rate of the cooling medium flowing through the cooling plate are dynamically regulated according to the temperature of the first component and / or the temperature of the second component.

[0086] In one implementation, a first valve is provided at the inlet of the liquid supply channel of the liquid cooling chamber, and a second valve is provided at the inlet of the cooling channel of the motor controller. The cooling medium flowing out of the circulating pump can flow into the liquid supply channel of the liquid cooling chamber and the cooling channel of the motor controller at the same time, and then be diverted to different liquid supply ports of the liquid cooling chamber through the liquid supply channel. The first valve and the second valve are electrically connected to the control unit respectively, and can receive the control signal sent by the control unit. The control unit sends the control signal to the first valve and the second valve based on the preset control logic, so as to adjust the valve opening to change the cooling medium flow in the liquid supply channel and the cooling channel. It should be noted that this embodiment does not limit the valve form.

[0087] In another implementation, Figure 1 As shown, the cooling medium flowing out of the circulation pump flows into the flow channel and is divided into the first branch and the second branch through the flow channel control valve, that is, the control unit controls the flow channel control valve based on a preset control logic to regulate the cooling medium flow in the first branch and the second branch, thereby adjusting the cooling medium flow flowing into the cooling channel in the liquid cooling chamber and the motor controller.

[0088] In the embodiment of the present application, the flow rate of the cooling medium flowing through the liquid cooling chamber and the flow rate of the cooling medium flowing through the cooling plate are precisely controlled based on multiple indicators, and different cooling medium flow rates are used to dissipate heat for heat-generating components at different temperatures, thereby achieving high-efficiency cooling control for components with high heat generation and low-efficiency cooling control for components with low heat generation, thereby maximizing the satisfaction of different cooling requirements of the power motor and the motor controller, ensuring that the power motor and the motor controller are fully cooled, improving the cooling efficiency, and thereby improving the operating efficiency of the electric engine; in addition, through efficient cooling of the power motor and heat-generating components, overheating of the power motor and the motor controller is avoided, and the power output of the power engine is guaranteed to be stable, thereby improving the performance of the electric engine.

[0089] In some embodiments, regulating the flow rate of the cooling medium flowing through the liquid cooling cavity and the flow rate of the cooling medium flowing through the cooling plate according to the temperature of the first component and / or the temperature of the second component includes:

[0090] Step 1.1: Match a target temperature condition corresponding to the first component temperature and / or the second component temperature among a plurality of temperature conditions applicable to the electric engine, wherein different flow distribution ratios correspond to different temperature conditions.

[0091] The larger the flow distribution ratio, the larger the valve opening (i.e. the degree of switching), the larger the cooling medium flow; the smaller the flow distribution ratio, the smaller the valve opening (i.e. the degree of switching), the smaller the cooling medium flow.

[0092] The temperature condition includes at least one of a magnitude relationship between the first component temperature and the second component temperature, a magnitude relationship between the first component temperature and the first component over-temperature protection temperature, and a magnitude relationship between the second component temperature and the second component over-temperature protection temperature.

[0093] For example, the corresponding relationship between the temperature condition and the flow distribution ratio is pre-stored in the memory of the electric engine, or stored in other databases of the aircraft, and the over-temperature protection temperature of the first component and the over-temperature protection temperature of the second component are also pre-set in the memory of the electric engine, or stored in other databases of the aircraft. After receiving the temperature sensor data, the control unit obtains the corresponding relationship between the temperature condition and the flow distribution ratio and the over-temperature protection temperature of the first component and the over-temperature protection temperature of the second component from the memory of the electric engine or other databases of the aircraft. Further, the preset control logic is executed in real time or regularly to match the target temperature condition corresponding to the temperature of the first component and / or the temperature of the second component in multiple temperature conditions, and the flow distribution ratio corresponding to the target temperature condition. It can be understood that as the temperature of the first component and the temperature of the second component change, the target temperature condition matched from the preset multiple temperature conditions also changes accordingly, and the corresponding flow distribution ratio also changes, thereby realizing dynamic regulation of the cooling medium flow through the liquid cooling chamber and the cooling medium flow through the cooling plate.

[0094] Step 1.2: If a target temperature condition corresponding to the temperature of the first component and / or the temperature of the second component is matched, the flow rate of the cooling medium flowing through the liquid cooling chamber and the flow rate of the cooling medium flowing through the cooling plate are regulated based on the flow distribution ratio corresponding to the target temperature condition.

[0095] For example, Table 1 shows a corresponding relationship between temperature conditions and flow distribution ratios.

[0096] Table 1

[0097]

[0098] Where T1 represents the temperature of the second component, T2 represents the temperature of the first component, and T C Indicates the over-temperature protection temperature of the second component, T m Indicates the over-temperature protection temperature of the first component. The temperature of the first component and the temperature of the second component change dynamically with the operation of the system.

[0099] like Figure 3As shown in the schematic diagram of the temperature curve of the first component provided by the exemplary embodiment of the present application, the horizontal axis represents the system operation time, and the vertical axis represents the temperature of the first component. As the system operation time accumulates, the temperature of the first component gradually increases. After exceeding the over-temperature protection temperature of the first component, the temperature of the first component tends to be stable. Figure 4 As shown in the schematic diagram of the temperature curve of the second component provided for the exemplary embodiment of the present application, the horizontal axis represents the system operating time, and the vertical axis represents the temperature of the second component. As the system operating time accumulates, the temperature of the second component gradually increases. After exceeding the over-temperature protection temperature of the second component, the temperature of the second component tends to stabilize.

[0100] Traverse the temperature conditions in Table 1, when the temperature of the second component and the temperature of the first component meet Tc-T1≤10℃ or T2-T1<0℃ When , the temperature condition completely matches the temperature of the first component and the temperature of the second component, and the temperature condition is the target temperature condition corresponding to the temperature of the first component and the temperature of the second component. Correspondingly, the flow distribution ratio under the target temperature condition is: the flow distribution ratio flowing through the liquid cooling chamber is 30%, and the flow distribution ratio flowing through the cooling plate is 70%; when the temperature of the second component and the temperature of the first component satisfy Tm-T2≤10℃ or T2-T1≥30℃, the temperature condition completely matches the temperature of the first component and the temperature of the second component, and the temperature condition is the target temperature condition corresponding to the temperature of the first component and the temperature of the second component. Correspondingly, the flow distribution ratio under the target temperature condition is: the flow distribution ratio flowing through the liquid cooling chamber is 70%, and the flow distribution ratio flowing through the cooling plate is 30%; when the temperature of the second component and the temperature of the first component satisfy 0≤T2-T1<30℃, the temperature condition completely matches the temperature of the first component and the temperature of the second component, and the temperature condition is the target temperature condition corresponding to the temperature of the first component and the temperature of the second component. Correspondingly, the flow distribution ratio under the target temperature condition is: the flow distribution ratio flowing through the liquid cooling chamber is 50%, and the flow distribution ratio flowing through the cooling plate is 50%.

[0101] For example, the preset over-temperature protection temperature of the second component is 70°C, and the over-temperature protection temperature of the first component is 80°C. When the control unit obtains that the second component temperature of the second heat-generating component is 50°C and the first component temperature is 20°C, the target temperature condition is determined to be T2-T1<0°C (the second component temperature is higher than the first component temperature) according to the preset control logic. At this time, the cooling demand of the motor controller is greater than the cooling demand of the power motor. The flow distribution ratio corresponding to the target temperature condition is 70% for the flow distribution ratio flowing through the cooling plate and 30% for the flow distribution ratio flowing through the liquid cooling chamber. The flow rate of the cooling medium flowing through the liquid cooling chamber and the flow rate of the cooling medium flowing through the cooling plate are regulated based on the target temperature condition.

[0102] When the control unit obtains that the temperature of the second component is 50°C and the temperature of the first component is 90°C, the target temperature condition is determined according to the preset control logic as Tm-T2≤10°C (the temperature of the first component is close to the over-temperature protection temperature of the first component), T2-T1≥30°C (the temperature of the first component is much higher than the temperature of the second component). At this time, the cooling demand of the power motor is greater than the cooling demand of the motor controller. From the table, it can be seen that the flow distribution ratio corresponding to the target temperature condition is 30% for the flow distribution ratio flowing through the cooling plate and 70% for the flow distribution ratio flowing through the liquid cooling cavity. Based on the target temperature condition, the flow rate of the cooling medium flowing through the liquid cooling cavity and the flow rate of the cooling medium flowing through the cooling plate are regulated.

[0103] When the control unit obtains that the temperature of the second component is 20°C and the temperature of the first component is 40°C, the target temperature condition is determined to be 0≤T2-T1<30°C (the temperature of the first component is close to the temperature of the second component) according to the preset control logic. At this time, the cooling demand of the power motor is close to the cooling demand of the motor controller. From the table, it can be seen that the flow distribution ratio corresponding to the target temperature condition is 50% for the flow distribution ratio flowing through the cooling plate and 50% for the flow distribution ratio flowing through the liquid cooling cavity. Based on the target temperature condition, the flow rate of the cooling medium flowing through the liquid cooling cavity and the flow rate of the cooling medium flowing through the cooling plate are regulated.

[0104] It should be noted that the above-mentioned flow distribution ratio and temperature conditions are only used as an example, and the flow distribution ratio and temperature conditions in the embodiments of the present application are not limited to the above-mentioned numerical values ​​or distribution forms.

[0105] In the embodiment of the present application, by matching the target temperature condition corresponding to the temperature of the first component and / or the temperature of the second component among the preset multiple temperature conditions, the flow rate of the cooling medium flowing through the liquid cooling chamber and the flow rate of the cooling medium flowing through the cooling plate are accurately regulated according to the flow distribution ratio corresponding to the matched target temperature condition, thereby improving the accuracy of the cooling medium flow control, realizing accurate temperature management of the electric engine, and thus improving the operating efficiency and performance of the electric engine.

[0106] In some embodiments, the cooling control method further includes: when the target temperature condition corresponding to the first component temperature and / or the second component temperature is not matched, for each temperature condition among multiple temperature conditions, determining the matching degree of the temperature condition with the first component temperature and / or the second component temperature; selecting the temperature condition corresponding to the maximum matching degree as the target temperature condition corresponding to the first component temperature and / or the second component temperature; and regulating the cooling medium flow rate flowing through the liquid cooling chamber and the cooling medium flow rate flowing through the cooling plate based on the flow distribution ratio corresponding to the target temperature condition.

[0107] Among them, the higher the matching degree, the closer the currently obtained first component temperature and second component temperature are to the preset temperature conditions. A matching degree of 0 indicates that the currently obtained first component temperature and second component temperature are not close to the preset temperature conditions at all. A matching degree of 100 indicates that the currently obtained first component temperature and second component temperature completely meet the preset temperature conditions.

[0108] Failure to match the target temperature condition corresponding to the first component temperature and / or the second component temperature can be understood as the absence of a target temperature condition with a matching degree of 100 in the multiple temperature conditions. It is then necessary to determine the temperature condition closest to the first component temperature and / or the second component temperature in the multiple temperature conditions as the target temperature condition.

[0109] For example, based on the first component temperature, the second component temperature, the second component over-temperature protection temperature and the first component over-temperature protection temperature, multiple temperature conditions are traversed to obtain multiple matching degrees. For a set of data of the first component temperature, the second component temperature, the second component over-temperature protection temperature and the first component over-temperature protection temperature, each temperature condition corresponds to a matching degree, and the temperature condition with the largest matching degree is selected as the target temperature condition.

[0110] In the embodiment of the present application, when the target temperature condition corresponding to the temperature of the first component and / or the temperature of the second component is not matched, the temperature condition with the greatest matching degree is selected as the target temperature condition, and the flow distribution ratio corresponding to the target temperature condition is used to regulate the flow of the cooling medium flowing through the liquid cooling chamber and the flow of the cooling medium flowing through the cooling plate, thereby ensuring that the heat-generating components of the power motor and the motor controller still have an appropriate amount of cooling medium for circulating heat dissipation, maximizing the guarantee that the heat dissipation requirements are met, and thereby ensuring that the efficiency and performance of the electric engine are maintained in a relatively stable range.

[0111] In some embodiments, the cooling control method may further include: when the target temperature condition corresponding to the first component temperature and / or the second component temperature is not matched, controlling the cooling medium flow rate flowing through the liquid cooling cavity to be greater than the cooling medium flow rate flowing through the cooling plate.

[0112] For example, when the control unit traverses multiple temperature conditions and fails to match the target temperature condition corresponding to the first component temperature and / or the second component temperature, it sends a first opening control signal to a first valve set at the liquid supply channel inlet of the liquid cooling chamber, and sends a second opening control signal to a second valve set at the cooling channel inlet of the motor controller, wherein the first opening is greater than the second opening, thereby controlling the cooling medium flow rate flowing through the liquid cooling chamber to be greater than the cooling medium flow rate flowing through the cooling plate.

[0113] Considering that the heat generated by the power motor is usually greater than the heat generated by the motor controller, preferably, the flow distribution ratio flowing through the liquid cooling chamber is 70%, and the flow distribution ratio flowing through the cooling plate is 30%.

[0114] In the embodiment of the present application, when the target temperature conditions corresponding to the temperature of the first component and / or the temperature of the second component are not matched, the flow rate of the cooling medium flowing through the liquid cooling chamber is controlled to be greater than the flow rate of the cooling medium flowing through the cooling plate, thereby ensuring that the heat-generating components of the power motor and the motor controller still have an appropriate amount of cooling medium for circulating heat dissipation, thereby maximizing the guarantee that the heat dissipation requirements are met, thereby ensuring that the efficiency and performance of the electric engine are maintained in a relatively stable range.

[0115] In some embodiments, a flow control valve is integrated in the motor controller, and the flow control valve is used to control the flow rate of the cooling medium flowing through the liquid cooling chamber and the flow rate of the cooling medium flowing through the cooling plate. Before obtaining the temperature of the first component and the temperature of the second component, the cooling control method also includes: monitoring the working state of the flow control valve, the working state includes a normal working state, an off-power state and a failure state; determining that the working state of the flow control valve is a normal working state; according to the temperature of the first component and / or the temperature of the second component, regulating the flow rate of the cooling medium flowing through the liquid cooling chamber and the flow rate of the cooling medium flowing through the cooling plate, including: according to the temperature of the first component and / or the temperature of the second component, regulating the opening of the flow control valve to regulate the flow rate of the cooling medium flowing through the liquid cooling chamber and the flow rate of the cooling medium flowing through the cooling plate.

[0116] In one example, the working state of the flow control valve is monitored by sensors (position sensors, flow sensors, pressure sensors, etc.). For example, the position sensor installed on the valve obtains the valve opening and position in real time. If the valve can open and close normally after receiving the control signal and meets the expected operating parameters, the working state is a normal working state; if the valve cannot open or close after receiving the control signal, the working state is a failure state; if the sensor data is analyzed and does not meet the expected operating parameters, the working state is a failure.

[0117] In another example, the working state of the flow control valve is monitored by a control signal or power supply. For example, when the valve does not receive power or a control signal, it is usually in a closed or default position. A voltage or current sensor is used to monitor the power supply state of the valve to detect whether there is power supply. If there is no power supply, the working state is a non-powered state.

[0118] When the working state of the flow channel control valve is a normal working state, the opening of the flow channel control valve is regulated to change the flow rate of the cooling medium flowing through the liquid cooling cavity and the flow rate of the cooling medium flowing through the cooling plate.

[0119] In some embodiments, the cooling control method further includes: when the flow channel control valve is in an unpowered state or a failed state, controlling the cooling medium flow rate flowing through the liquid cooling cavity to be greater than the cooling medium flow rate flowing through the cooling plate.

[0120] For example, by pre-modifying the return spring of the flow channel control valve so that the opening of the valve corresponding to the first branch is smaller than the opening of the valve corresponding to the second branch, the larger the opening, the larger the flow distribution ratio, the larger the cooling medium flow, and the flow distribution ratio is between 0 and 100%. When the flow channel control valve is not powered or fails, it is directly reset so that the valve opening corresponding to the first branch is smaller than the valve opening corresponding to the second branch, that is, the cooling medium flow through the cooling plate is smaller than the cooling medium flow through the liquid cooling chamber. Considering that the heat generated by the power motor is usually greater than the heat generated by the motor controller, preferably, the flow distribution ratio through the liquid cooling chamber is 70%, and the flow distribution ratio through the cooling plate is 30%.

[0121] Optionally, the actual heat generation relationship between the power motor and the motor controller under rated continuous power can be obtained in advance based on the type, model, actual application scenario, etc. of the power motor and the motor controller by actual measurement or simulation. Based on the actual heat generation relationship between the power motor and the motor controller, the return spring structure of the flow control valve can be designed. For example, if the motor controller generates a lot of heat, the valve opening corresponding to the first branch can be designed to be large. When the flow control valve is in an unpowered state or an invalid state, the return spring automatically resets so that the valve opening corresponding to the first branch is larger than the valve opening corresponding to the second branch.

[0122] The embodiments of the present application ensure that when the cooling medium flow distribution fails, the heat-generating components of the power motor and the motor controller still have an appropriate amount of cooling medium circulating to dissipate heat, thereby maximizing the guarantee that the heat dissipation requirements are met.

[0123] In some embodiments, a flow control valve is integrated in the motor controller, and the flow control valve is used to control the flow rate of the cooling medium flowing through the liquid cooling chamber and the flow rate of the cooling medium flowing through the cooling plate. The flow control valve is a dual-redundancy configuration, and the flow rate of the cooling medium flowing through the liquid cooling chamber and the flow rate of the cooling medium flowing through the cooling plate are regulated according to the temperature of the first component and / or the temperature of the second component, including: monitoring the working state of the dual-redundancy configured flow control valve, the working state includes a normal working state; determining a target flow control valve that is in a normal working state; and regulating the flow rate of the cooling medium flowing through the liquid cooling chamber and the flow rate of the cooling medium flowing through the cooling plate according to the temperature of the first component and / or the temperature of the second component.

[0124] Among them, the flow channel control valve is a dual-redundancy configuration, and the dual-redundancy flow channel control valve is arranged in parallel in the motor controller. Each flow channel control valve is used to control the flow rate of the cooling medium flowing through the liquid cooling chamber and the flow rate of the cooling medium flowing through the cooling plate.

[0125] In one example, two flow channel control valves are used together to control the distribution of the cooling medium flow. For example, branch A of the first redundant flow channel control valve and branch B of the second redundant flow channel control valve are connected to the liquid supply flow channel of the liquid cooling chamber through different bypass flow channels, and branch C of the first redundant flow channel control valve and branch D of the second redundant flow channel control valve are connected to the cooling flow channel of the motor controller.

[0126] When both flow channel control valves are normal, the two flow channel control valves work together, that is, the cooling medium flowing out of the circulating pump flows into the first redundant flow channel control valve and the second redundant flow channel control valve at the same time, and the valve openings corresponding to branches A, branch B, branch C, and branch D of the flow channel control valves are controlled according to the flow distribution ratio corresponding to the target temperature condition. For example, the flow distribution ratio corresponding to the target temperature condition is: the flow distribution ratio flowing through the liquid cooling chamber is 70%, and the flow distribution ratio flowing through the cooling plate is 30%. The cooling medium flow distribution ratios of branch A, branch C, branch B, and branch D are controlled to be 70%, 30%, 70%, and 30%, respectively.

[0127] When the first redundant flow channel control valve fails, the second redundant flow channel control valve works alone to control the cooling medium flowing out of the circulating pump to flow only into the second redundant flow channel control valve, and the flow distribution ratios of branch B and branch D are controlled to be 70% and 30% respectively.

[0128] In another example, two flow channel control valves serve as backup for each other. When one redundant flow channel control valve fails or is not powered, the other redundant flow channel control valve is selected as the new target flow channel control valve, and based on the flow distribution ratio corresponding to the target temperature condition, the normal flow channel control valve is regulated to adjust the cooling medium flow through the liquid cooling chamber and the cooling medium flow through the cooling plate.

[0129] Optionally, the number of flow channel control valves involved in the cooling medium flow distribution control can be regulated according to the size of the cooling medium flow in the entire pipeline. For example, when the cooling medium flow in the pipeline is too large, both flow channel control valves are regulated to participate in the cooling medium flow distribution control. When the cooling medium flow in the pipeline is too small, one flow channel control valve is regulated to participate in the cooling medium flow distribution control.

[0130] The embodiment of the present application monitors the working status of the dual redundant flow control valves, dynamically adjusts the distribution control of the cooling medium flow, and ensures through redundant design that when any flow control valve fails, the cooling needs of the electric engine are still met, thereby improving the reliability of the cooling system and further improving the performance and efficiency of the electric engine. In addition, the number of dual redundant flow control valves used can be flexibly adjusted according to different working conditions and requirements, thereby improving the flexibility of the system and adapting to various operating conditions.

[0131] In some embodiments, the control unit is integrated in the motor controller, the flow channel control valve is dual-redundant, and the motor controller is dual-redundant. One redundant motor controller controls one redundant flow channel control valve, and another redundant motor controller controls another redundant flow channel control valve. When any redundant motor controller or any redundant flow channel control valve fails, another redundant motor controller controls another redundant flow channel control valve to regulate the flow of cooling medium flowing through the liquid cooling chamber and the flow of cooling medium flowing through the cooling plate; when the dual-redundant motor controller and the dual-redundant flow channel control valve are both normal, they work together, that is, they are used together to regulate the flow of cooling medium flowing through the liquid cooling chamber and the flow of cooling medium flowing through the cooling plate.

[0132] In some embodiments, the control unit is integrated in the motor controller, the flow control valve is dual-redundant configuration, and the motor controller is single-redundant configuration. The motor controller regulates the flow control valve of the dual-redundant configuration according to the temperature of the second component and / or the temperature of the first component to adjust the flow rate of the cooling medium flowing through the liquid cooling chamber and the flow rate of the cooling medium flowing through the cooling plate.

[0133] In some embodiments, the control unit is integrated into the motor controller, the flow channel control valve is in a single-redundancy configuration, and the motor controller is in a double-redundancy configuration.

[0134] For example, when both redundant motor controllers are normal, one of the redundant motor controllers controls the flow control valve, and the other redundant motor controller serves as a backup. When a failure of one redundant motor controller is detected, the other redundant motor controller takes over the control of the flow control valve to adjust the flow rate of the cooling medium flowing through the liquid cooling chamber and the flow rate of the cooling medium flowing through the cooling plate.

[0135] The above redundant design improves the reliability of the electric engine cooling system, ensures cooling efficiency, and thus improves the performance and efficiency of the electric engine.

[0136] In some embodiments, the plurality of temperature conditions are determined based at least on the flow area of ​​the liquid supply port of the liquid cooling chamber and the number of the liquid supply ports.

[0137] Among them, the flow area of ​​the liquid supply port can be understood as the size of the diameter of the liquid supply port. A large diameter means a large flow area. The same flow rate of cooling medium flowing into the liquid supply port with a large flow area produces a better cooling effect than flowing into the liquid supply port with a small flow area. The more liquid supply ports there are, the more annular cooling channels there are in the cooling cavity, the more uniform the heat dissipation of the coil winding, and the better the heat dissipation effect. Therefore, the flow area of ​​the liquid supply port and the number of liquid supply ports both affect the cooling effect. For the same heat dissipation requirement, the larger the flow area of ​​the liquid supply port, the less the required cooling medium flow rate, and the smaller the flow area of ​​the liquid supply port, the more the required cooling medium flow rate; for the same heat dissipation requirement, the more liquid supply ports there are, the less the required cooling medium flow rate, the smaller the flow area of ​​the liquid supply port, and the more the required cooling medium flow rate.

[0138] Therefore, when regulating the flow rate of the cooling medium flowing through the liquid cooling chamber and the flow rate of the cooling medium flowing through the cooling plate, it is necessary to comprehensively consider the heat dissipation requirements of each heat-generating component and the factors affecting the cooling effect.

[0139] For example, the temperature condition and the flow distribution ratio are calibrated in advance based on different numbers of liquid supply ports and the flow areas of the liquid supply ports, and the corresponding relationship between the temperature condition and the flow distribution ratio under different numbers of liquid supply ports and flow areas is obtained.

[0140] It is understandable that the flow area and number of the liquid supply ports of the liquid cooling chamber of the power motor in different electric engines may be different. In actual application, in one implementation, when the electric engine is used for the first time or before leaving the factory, multiple temperature conditions applicable to the electric engine are determined from pre-calibrated temperature conditions based on the flow area and number of the liquid supply ports of the liquid cooling chamber of the power motor, and configured into the memory. It should be noted that if the flow area and number of the liquid supply ports of the liquid cooling chamber of the power motor change, for example, the power motor is replaced due to hardware failure or other reasons, it is necessary to re-determine multiple temperature conditions applicable to the electric engine and configure them into the memory.

[0141] In the embodiment of the present application, the applicable temperature conditions for the electric engine are determined based on the flow area and number of the liquid supply ports of the liquid cooling chamber, thereby improving the accuracy of the temperature conditions. Furthermore, when allocating the cooling medium flow to the motor controller and the power motor based on the temperature conditions, the accuracy is higher and the cooling effect is better.

[0142] In some embodiments, the cooling control method further includes: sending the first component temperature, the second component temperature and the working status of the target component to the flight control system, the flight control system is used to remotely monitor the electric engine, and the target component includes at least one of a flow control valve integrated in the motor controller, a circulating pump in the cooling system of the electric engine, and a heat dissipation component.

[0143] For example, the control unit monitors the working status of the circulation pump, the heat dissipation component and the flow control valve in the cooling system of the electric engine, and reports the first component temperature, the second component temperature and the working status of the circulation pump, the heat dissipation component and the flow control valve to the flight control system. Figure 5As shown in the structural schematic diagram of the control unit provided for the exemplary embodiment of the present application, the control unit, for example, includes a data acquisition module, a data analysis module, an execution control module, and a communication module. The data acquisition module communicates with the first component temperature sensor on the power motor and the second component temperature sensor on the motor controller to collect the first component temperature and the second component temperature in the cooling circuit. The data acquisition module also collects the working status of the circulating pump, the heat dissipation component and the flow control valve. The data analysis module communicates with the data acquisition module, analyzes the first component temperature and the second component temperature collected by the data acquisition module through the data analysis module, and executes the preset control logic to obtain the control method of the flow control valve; the execution control module is connected to the flow control valve, and controls the flow control valve according to the control method to change the cooling medium flow distribution ratio in each branch of the flow control valve. The execution control module can also be connected to the circulating pump and the heat dissipation component to control the circulating pump speed and the heat dissipation component speed; the communication module is connected to the aircraft gateway platform, and transmits the data of the data acquisition module and the data analysis module to the aircraft communication network, such as the CAN network, through the communication module. By setting up a data acquisition module, a data analysis module, an execution control module and a communication module, the operating status of the cooling circuit can be effectively monitored; the operating status of the circulation pump and the heat dissipation component can be efficiently controlled to make the cooling system work in the best state; the flow rate of the cooling medium flowing through the liquid cooling chamber and the flow rate of the cooling medium flowing through the cooling plate can be regulated according to the temperature of the first component and / or the temperature of the second component; the operating status of the first component temperature, the second component temperature, the flow channel control valve, the circulation pump and the heat dissipation component in the cooling circuit are fed back to the CAN network.

[0144] It should be noted that Figure 5 The module configuration of the control unit shown is only an example, and the embodiments of the present application do not limit the module configuration of the control unit.

[0145] The embodiment of the present application can timely discover and diagnose potential problems and facilitate preventive maintenance by real-time monitoring of the temperature of the first component, the temperature of the second component and the working status of the target component, thereby reducing the risk of electric engine failure and improving the reliability of the electric engine; in addition, it provides a remote monitoring basis for the flight control system, thereby simplifying maintenance and management work and reducing manual intervention.

[0146] In some embodiments, the heat dissipation assembly includes a fan.

[0147] The fan exhausts hot air from the inside of the radiator or introduces cold air into the radiator by forced convection, thereby accelerating the heat exchange of the radiator and improving the heat dissipation efficiency of the radiator.

[0148] In summary, this application has at least the following advantages:

[0149] 1. Based on multiple indicators, the cooling medium flow rate flowing through the liquid cooling chamber and the cooling medium flow rate flowing through the cooling plate are precisely controlled. Different cooling medium flow rates are used to dissipate heat for heat-generating components at different temperatures, so as to achieve high-efficiency cooling control for components with high heat generation and low-efficiency cooling control for components with low heat generation, thereby maximizing the satisfaction of different cooling requirements of the power motor and motor controller, ensuring that the power motor and motor controller are fully cooled, improving cooling efficiency, and thereby improving the operating efficiency of the electric engine; in addition, through efficient cooling of the power motor and heat-generating components, overheating of the power motor and motor controller is avoided, and the power output of the power engine is guaranteed to be stable, thereby improving the performance of the electric engine.

[0150] 2. By matching the target temperature conditions corresponding to the temperature of the first component and / or the temperature of the second component among the preset multiple temperature conditions, the flow control valve is regulated according to the flow distribution ratio corresponding to the matched target temperature conditions, and the cooling medium flow through the liquid cooling chamber and the cooling medium flow through the cooling plate are accurately regulated, thereby improving the accuracy of cooling medium flow control to achieve precise temperature management of the electric engine.

[0151] 3. When the target temperature condition corresponding to the temperature of the first component and / or the temperature of the second component is not matched, the temperature condition with the maximum matching degree is selected as the target temperature condition, and the flow distribution ratio corresponding to the target temperature condition is used to regulate the flow of the cooling medium flowing through the liquid cooling chamber and the flow of the cooling medium flowing through the cooling plate, or, when the cooling medium flow distribution fails, the cooling medium flow through the liquid cooling chamber is controlled to be greater than the cooling medium flow through the cooling plate, so as to ensure that the heat-generating components of the power motor and the motor controller still have an appropriate amount of cooling medium for circulating heat dissipation, maximize the guarantee that the heat dissipation demand is met, and thereby ensure that the efficiency and performance of the electric engine are maintained in a relatively stable range.

[0152] 4. By monitoring the working status of the dual redundant flow control valve, the distribution control of the cooling medium flow is dynamically adjusted. Through redundant design, it is ensured that when any flow control valve fails, the cooling needs of the electric engine are still met, thereby improving the reliability of the cooling system and thus improving the performance and efficiency of the electric engine. In addition, the number of dual redundant flow control valves used can be flexibly adjusted according to different working conditions and needs, thereby improving the flexibility of the system and adapting to various operating conditions.

[0153] 5. The embodiments of the present application can timely discover and diagnose potential problems and facilitate preventive maintenance by real-time monitoring of the temperature of the first component, the temperature of the second component and the working status of the target component, thereby reducing the risk of electric engine failure and improving the reliability of the electric engine; in addition, it provides a remote monitoring basis for the flight control system, thereby simplifying maintenance and management work and reducing manual intervention.

[0154] The following is an embodiment of the device of the present application, which can be used to execute the embodiment of the method of the present application. For details not disclosed in the embodiment of the device of the present application, please refer to the embodiment of the method of the present application.

[0155] Figure 6 This is a schematic diagram of the structure of the cooling control device of the electric engine provided by the exemplary embodiment of the present application. The cooling control device of the electric engine provided by the exemplary embodiment of the present application is used to control the cooling of the electric engine contained in the aircraft. The electric engine includes a power motor and a motor controller. The motor controller is integrated inside the power motor. The power motor includes a first heat-generating component and a bracket assembly with a liquid cooling cavity. The first heat-generating component is arranged in the liquid cooling cavity. The motor controller includes a second heat-generating component. The second heat-generating component is arranged close to the cooling plate. The cooling medium flowing through the liquid cooling cavity and the cooling plate is different. Figure 6 As shown, the cooling control device 60 of the electric engine includes: an acquisition module 61 and a control module 62, wherein:

[0156] Acquisition module 61: used to acquire a first component temperature of a first heat-generating component and / or a second component temperature of a second heat-generating component;

[0157] The control module 62 is used to adjust the flow rate of the cooling medium flowing through the liquid cooling chamber and the flow rate of the cooling medium flowing through the cooling plate according to the temperature of the first component and / or the temperature of the second component, so as to independently control the cooling of the power motor and the motor controller.

[0158] In one possible implementation, the control module 62 is specifically used to: match a target temperature condition corresponding to the first component temperature and / or the second component temperature among multiple temperature conditions applicable to the electric engine, wherein different temperature conditions correspond to different flow distribution ratios; if a target temperature condition corresponding to the first component temperature and / or the second component temperature is matched, based on the flow distribution ratio corresponding to the target temperature condition, regulate the cooling medium flow through the liquid cooling chamber and the cooling medium flow through the cooling plate.

[0159] In a possible implementation, the control module 62 is further used to: when the target temperature condition corresponding to the first component temperature and / or the second component temperature is not matched, determine, for each temperature condition among the multiple temperature conditions, a matching degree between the temperature condition and the first component temperature and / or the second component temperature; select the temperature condition corresponding to the maximum matching degree as the target temperature condition corresponding to the first component temperature and / or the second component temperature; and regulate the cooling medium flow rate flowing through the liquid cooling chamber and the cooling medium flow rate flowing through the cooling plate based on the flow distribution ratio corresponding to the target temperature condition.

[0160] In a possible implementation, the control module 62 is further used to: when the target temperature condition corresponding to the first component temperature and / or the second component temperature is not matched, control the cooling medium flow rate flowing through the liquid cooling chamber to be greater than the cooling medium flow rate flowing through the cooling plate.

[0161] In a possible embodiment, a flow control valve is integrated in the motor controller, and the flow control valve is used to control the flow of cooling medium flowing through the liquid cooling chamber and the flow of cooling medium flowing through the cooling plate. Before obtaining the temperature of the first component and the temperature of the second component, the cooling control device 60 of the electric engine also includes a monitoring module, and the monitoring module is used to: monitor the working state of the flow control valve, the working state includes a normal working state, a power-off state and a failure state; determine that the working state of the flow control valve is a normal working state.

[0162] In a possible implementation, the control module 62 is further configured to: when the flow channel control valve is in an unpowered state or a failed state, control the cooling medium flow rate flowing through the liquid cooling cavity to be greater than the cooling medium flow rate flowing through the cooling plate.

[0163] In one possible embodiment, a flow control valve is integrated in the motor controller, and the flow control valve is used to control the flow of cooling medium flowing through the liquid cooling chamber and the flow of cooling medium flowing through the cooling plate. The flow control valve is a dual-redundancy configuration, and the control module 62 is also used to: monitor the working state of the dual-redundancy configured flow control valve, the working state includes a normal working state; determine the target flow control valve in a normal working state; and regulate the flow of cooling medium flowing through the liquid cooling chamber and the flow of cooling medium flowing through the cooling plate according to the temperature of the first component and / or the temperature of the second component.

[0164] In a possible embodiment, the cooling control device 60 of the electric engine also includes a sending module, which is used to send the first component temperature, the second component temperature and the working status of the target component to the flight control system, the flight control system is used to remotely monitor the electric engine cooling system, and the target component includes at least one of the flow control valve integrated in the motor controller, the circulating pump in the cooling system of the electric engine and the heat dissipation component.

[0165] In a possible implementation, the heat dissipation component includes a fan.

[0166] The cooling control device for an electric engine provided in the embodiment of the present application can implement the technical solution shown in the above-mentioned cooling control method embodiment of the electric engine. Its implementation principle and beneficial effects are similar and will not be repeated here.

[0167] It should be noted that it should be understood that the division of the various modules of the above device is only a division of logical functions. In actual implementation, they can be fully or partially integrated into one physical entity, or they can be physically separated. And these modules can all be implemented in the form of software called by processing elements; they can also be all implemented in the form of hardware; some modules can also be implemented in the form of software called by processing elements, and some modules can be implemented in the form of hardware. For example, the control module can be a separately established processing element, or it can be integrated in a chip of the above device. In addition, it can also be stored in the memory of the above device in the form of program code, and called and executed by a processing element of the above device. The function of the above acquisition module. The implementation of other modules is similar. In addition, these modules can be fully or partially integrated together, or they can be implemented independently. The processing element here can be an integrated circuit with signal processing capabilities. In the implementation process, each step of the above method or each module above can be completed by an integrated logic circuit of hardware in the processor element or instructions in the form of software.

[0168] For example, the above modules may be one or more integrated circuits configured to implement the above methods, such as one or more application specific integrated circuits (ASIC), or one or more microprocessors (DSP), or one or more field programmable gate arrays (FPGA). For another example, when a module above is implemented in the form of a processing element scheduling program code, the processing element may be a general-purpose processor, such as a central processing unit (CPU) or other processor that can call program code. For another example, these modules may be integrated together and implemented in the form of a system-on-a-chip (SOC).

[0169] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loading and executing computer instructions on a computer, the process or function according to the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from a website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (Digital Subscriber Line, referred to as DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more available media integrated. The available media may be magnetic media (eg, floppy disks, hard disks, magnetic tapes), optical media (eg, Digital Video Discs (DVDs)), or semiconductor media (eg, solid state disks (SSDs)).

[0170] The control unit provided in this embodiment includes: at least one processor and a memory. Optionally, the control unit also includes a communication component. The processor, the memory and the communication component are connected via a bus.

[0171] In a specific implementation process, at least one processor executes computer-executable instructions stored in a memory, so that at least one processor executes the above method.

[0172] The specific implementation process of the processor can be found in the above method embodiment, and its implementation principle and technical effect are similar, so this embodiment will not be repeated here.

[0173] In the above embodiments, it should be understood that the processor can be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), etc. A general-purpose processor can be a microprocessor or any conventional processor. The steps of the method disclosed in the invention can be directly implemented as a hardware processor, or can be implemented by a combination of hardware and software modules in the processor.

[0174] The memory may include a high-speed memory (Random Access Memory, RAM), and may also include a non-volatile memory (NVM), such as at least one disk storage.

[0175] The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, the bus in the drawings of this application is not limited to only one bus or one type of bus.

[0176] In a possible embodiment, the control unit is integrated into a motor controller included in the electric motor.

[0177] In a possible implementation, the motor controller is configured with dual redundancy.

[0178] The implementation principle and technical effects of the control unit provided in this embodiment can be found in the aforementioned embodiments and will not be described in detail here.

[0179] The present application also provides a cooling system for an electric engine, the electric engine includes a power motor and a motor controller, the motor controller is integrated inside the power motor; the cooling system includes a flow channel, a first branch, a second branch, a flow channel control valve and the above-mentioned control unit, wherein the flow channel control valve is integrated inside the motor controller, the cooling medium in the flow channel is diverted to the first branch and the second branch through the flow channel control valve, the flow channel control valve is used to control the flow rate of the cooling medium in the first branch and the second branch, the cooling medium flowing through the first branch is used to cool the motor controller, and the cooling medium flowing through the second branch is used to cool the power motor.

[0180] In a possible implementation, the cooling system of the electric engine further includes: a flight control system for monitoring the electric engine, and the flight control system is communicatively connected with the control unit.

[0181] The implementation principle and technical effects of the cooling system for the electric engine provided in this embodiment can be found in the aforementioned embodiments and will not be described in detail here.

[0182] The present application also provides a computer program product, including a computer program, which implements the above method when executed.

[0183] The present application also provides a computer-readable storage medium, in which computer-executable instructions are stored. When the computer-executable instructions are executed, the above method is implemented.

[0184] The above-mentioned readable storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk. The readable storage medium can be any available medium that can be accessed by a general or special-purpose computer.

[0185] An exemplary readable storage medium is coupled to a processor so that the processor can read information from the readable storage medium and write information to the readable storage medium. Of course, the readable storage medium can also be a component of the processor. The processor and the readable storage medium can be located in an application specific integrated circuit (Application Specific Integrated Circuits, referred to as: ASIC). Of course, the processor and the readable storage medium can also exist in the device as discrete components.

[0186] The division of units is only a logical function division, and there may be other divisions in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interface, device or unit, which can be electrical, mechanical or other forms.

[0187] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0188] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0189] If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods of each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc. Various media that can store program codes.

[0190] Finally, it should be noted that those skilled in the art will readily conceive of other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. The present invention is intended to cover any variations, uses or adaptations of the present invention, which follow the general principles of the present invention and include common knowledge or customary technical means in the art not disclosed by the present invention, are not limited to the precise structure described above and shown in the drawings, and may be modified and changed in various ways without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A cooling control method for an electric engine, characterized in that: Used to control the cooling of an electric engine included in an aircraft, the electric engine comprising a power motor and a motor controller, the motor controller being integrated inside the power motor, the power motor comprising a first heat-generating component and a bracket assembly having a liquid cooling cavity, the first heat-generating component being arranged in the liquid cooling cavity; the motor controller comprising a second heat-generating component, the second heat-generating component being arranged close to the cooling plate; The cooling medium flows through the liquid cooling cavity and the cooling plate respectively through different branches; The cooling control method comprises: Acquire a first component temperature of the first heat-generating component and a second component temperature of the second heat-generating component; According to the temperature of the first component and / or the temperature of the second component, the flow rate of the cooling medium flowing through the liquid cooling chamber and the flow rate of the cooling medium flowing through the cooling plate are regulated to independently control the cooling of the power motor and the motor controller.

2. The cooling control method according to claim 1, characterized in that: The step of regulating the flow rate of the cooling medium flowing through the liquid cooling cavity and the flow rate of the cooling medium flowing through the cooling plate according to the temperature of the first component and / or the temperature of the second component includes: Matching a target temperature condition corresponding to the first component temperature and / or the second component temperature among a plurality of temperature conditions applicable to the electric engine, wherein different flow distribution ratios corresponding to different temperature conditions are different; If a target temperature condition corresponding to the temperature of the first component and / or the temperature of the second component is matched, the flow rate of the cooling medium flowing through the liquid cooling chamber and the flow rate of the cooling medium flowing through the cooling plate are regulated based on the flow distribution ratio corresponding to the target temperature condition.

3. The cooling control method according to claim 2, characterized in that: The cooling control method further comprises: When the target temperature condition corresponding to the first component temperature and / or the second component temperature is not matched, determining, for each of the plurality of temperature conditions, a matching degree between the temperature condition and the first component temperature and / or the second component temperature; Selecting a temperature condition corresponding to a maximum matching degree as a target temperature condition corresponding to the temperature of the first component and / or the temperature of the second component; Based on the flow distribution ratio corresponding to the target temperature condition, the flow rate of the cooling medium flowing through the liquid cooling cavity and the flow rate of the cooling medium flowing through the cooling plate are regulated.

4. The cooling control method according to claim 2, characterized in that: The cooling control method further comprises: When the target temperature condition corresponding to the first component temperature and / or the second component temperature is not matched, the flow rate of the cooling medium flowing through the liquid cooling cavity is controlled to be greater than the flow rate of the cooling medium flowing through the cooling plate.

5. The cooling control method according to any one of claims 1 to 4, characterized in that: The motor controller is integrated with a flow channel control valve, and the flow channel control valve is used to control the flow of the cooling medium flowing through the liquid cooling chamber and the flow of the cooling medium flowing through the cooling plate. Before obtaining the first component temperature of the first heat-generating component and the second component temperature of the second heat-generating component, the cooling control method further includes: Monitoring the working state of the flow channel control valve, wherein the working state includes a normal working state, a power-off state and a failure state; Determining that the working state of the flow channel control valve is a normal working state; The method of regulating the flow rate of the cooling medium flowing through the liquid cooling chamber and the flow rate of the cooling medium flowing through the cooling plate according to the temperature of the first component and / or the temperature of the second component includes: regulating the opening of the flow channel control valve according to the temperature of the first component and / or the temperature of the second component to regulate the flow rate of the cooling medium flowing through the liquid cooling chamber and the flow rate of the cooling medium flowing through the cooling plate.

6. The cooling control method according to claim 5, characterized in that: The cooling control method further comprises: When the flow channel control valve is in a non-powered state or a failed state, the flow rate of the cooling medium flowing through the liquid cooling cavity is controlled to be greater than the flow rate of the cooling medium flowing through the cooling plate.

7. The cooling control method according to any one of claims 1 to 4, characterized in that: The motor controller is integrated with a flow channel control valve, which is used to control the flow of the cooling medium flowing through the liquid cooling cavity and the flow of the cooling medium flowing through the cooling plate. The flow channel control valve is a dual-redundancy configuration, and the flow of the cooling medium flowing through the liquid cooling cavity and the flow of the cooling medium flowing through the cooling plate are regulated according to the temperature of the first component and / or the temperature of the second component, including: Monitoring the working state of the flow channel control valve with dual redundancy configuration, wherein the working state includes a normal working state; Determine the target flow path control valve in normal working condition; The target flow channel control valve is regulated according to the temperature of the first component and / or the temperature of the second component to regulate the flow rate of the cooling medium flowing through the liquid cooling cavity and the flow rate of the cooling medium flowing through the cooling plate.

8. The cooling control method according to claim 2, characterized in that: The multiple temperature conditions are determined at least according to the flow area of ​​the liquid supply port of the liquid cooling chamber and the number of the liquid supply ports.

9. The cooling control method according to any one of claims 1 to 4, characterized in that: Also includes: The temperature of the first component, the temperature of the second component, and the working status of a target component are sent to a flight control system, wherein the flight control system is used to remotely monitor the electric engine, and the target component includes at least one of a flow control valve integrated in the motor controller, a circulating pump in a cooling system of the electric engine, and a heat dissipation component.

10. A cooling control device for an electric engine, characterized in that: Used to control the cooling of an electric engine included in an aircraft, the electric engine comprising a power motor and a motor controller, the motor controller being integrated inside the power motor, the power motor comprising a first heat-generating component and a bracket assembly having a liquid cooling cavity, the first heat-generating component being arranged in the liquid cooling cavity; the motor controller comprising a second heat-generating component, the second heat-generating component being arranged close to the cooling plate; The cooling medium flows through the liquid cooling cavity and the cooling plate respectively through different branches; The cooling control device comprises: An acquisition module, configured to acquire a first component temperature of the first heat-generating component and a second component temperature of the second heat-generating component; A control module is used to adjust the flow rate of the cooling medium flowing through the liquid cooling chamber and the flow rate of the cooling medium flowing through the cooling plate according to the temperature of the first component and / or the temperature of the second component, so as to independently control the cooling of the power motor and the motor controller.

11. A control unit, characterized in that: include: A processor, and a memory communicatively connected to the processor; The memory is used to store computer-executable instructions; The processor is configured to execute the computer-executable instructions to implement the method according to any one of claims 1 to 9.

12. The control unit according to claim 11, characterized in that The control unit is integrated into a motor controller included in the electric motor.

13. The control unit according to claim 11 or 12, characterized in that: The motor controller is dual-redundant.

14. A cooling system for an electric engine, characterized in that: The electric engine comprises a power motor and a motor controller, wherein the motor controller is integrated inside the power motor; The cooling system comprises a flow channel, a first branch, a second branch, a flow channel control valve and a control unit as described in any one of claims 11 to 13, wherein the flow channel control valve is integrated inside the motor controller, and the cooling medium in the flow channel is diverted to the first branch and the second branch through the flow channel control valve, and the flow channel control valve is used to control the flow rate of the cooling medium in the first branch and the second branch, the cooling medium flowing through the first branch is used to cool the motor controller, and the cooling medium flowing through the second branch is used to cool the power motor.

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