Method and apparatus for power regulation of electric air conditioner compressor controller

Abstract

The method and device for power regulation of an electric air conditioner compressor controller are provided in the embodiments of the present disclosure, and the method comprises the following steps: determining the output power of the compressor controller based on the upper limit value of power issued by an upper computer and the input power of the controller; determining the loss power of the compressor controller based on the input voltage value of the compressor controller and the temperature information of an inverter; and obtaining the input power of the compressor controller based on the sum of the output power of the compressor controller and the loss power of the compressor controller. Through the processing scheme of the present disclosure, the power regulation accuracy of the compressor controller is improved.

Description

Technical Field

[0001] This invention relates to the field of power electronic control, and more specifically to a method and apparatus for power regulation of an electric air conditioner compressor controller. Background Technology

[0002] Regulating the power of the compressor controller is often used in the field of electric vehicles. By limiting and adjusting the power of the compressor controller, the optimal power distribution of the whole vehicle can be achieved, maximizing the driving range, and protecting the controller hardware.

[0003] In related technologies, the power of the compressor controller is adjusted by reducing the compressor speed in an open-loop manner. Obviously, this method has low accuracy in adjusting the power of the compressor controller and is prone to causing the compressor to stop. Summary of the Invention

[0004] In view of this, the present disclosure provides a compressor controller power regulation method, which at least partially solves the problems existing in the prior art.

[0005] In a first aspect, embodiments of this disclosure provide a method for power regulation of an electric air conditioner compressor controller, characterized by comprising: determining the output power of the compressor controller based on a power upper limit value issued by a host computer and the input power of the compressor controller; determining the power loss of the compressor controller based on the input voltage value of the compressor controller and the temperature information of the inverter; and obtaining the input power of the compressor controller based on the sum of the output power of the compressor controller and the power loss of the compressor controller.

[0006] According to a specific implementation of this disclosure, determining the output power of the compressor controller based on the upper power limit value issued by the host computer and the input power of the compressor controller includes: determining the target compressor speed based on the upper power limit value issued by the host computer and the current input power of the compressor controller; and determining the output power of the compressor controller based on the compressor speed.

[0007] According to a specific implementation of this disclosure, determining the target compressor speed based on the upper power limit value issued by the host computer and the input power of the current compressor controller includes: obtaining the upper power limit value issued by the host computer; obtaining the input power of the compressor controller based on the product of the input current and the input voltage of the compressor controller; and inputting the upper power limit value and the input power of the compressor controller into a first filter and a linear controller, and obtaining the target compressor speed based on the output result of a second filter; wherein the cutoff frequencies of the first filter and the second filter are different.

[0008] According to a specific implementation of this disclosure, obtaining the power upper limit value issued by the host computer includes: parsing the power limiting command issued by the host computer to obtain the power upper limit value.

[0009] According to a specific implementation of this disclosure, the step of inputting the upper power limit and the input power of the compressor controller into a first filter and a linear controller, and obtaining the target compressor speed based on the output result of a second filter, includes: inputting the upper power limit and the input power of the compressor controller into a first filter, and determining a target proportional coefficient of the linear controller based on a comparison between the output result of the first filter and a preset gain threshold; adjusting the linear controller according to the target proportional coefficient to obtain the output result of the linear controller; inputting the output result of the linear controller and a preset compressor speed into the second filter, and determining the target compressor speed based on the output result of the second filter.

[0010] According to a specific implementation of this disclosure, determining the power loss of the compressor controller based on the input voltage value of the compressor controller and the temperature information of the inverter includes: determining an upper limit value of the output current of the compressor controller based on the input voltage value of the compressor controller and the temperature information of the inverter; and determining the power loss of the compressor controller based on the upper limit value of the output current of the compressor controller.

[0011] According to a specific implementation of this disclosure, determining the upper limit of the compressor controller's output current based on the input voltage value of the compressor controller and the temperature information of the inverter includes: obtaining the temperature rise characteristic curve of the inverter based on the input voltage value of the compressor controller and the temperature information of the inverter; and determining the upper limit of the compressor controller's output current based on the temperature rise characteristic curve of the inverter.

[0012] Secondly, the embodiments disclosed herein provide

[0013] A device for power regulation of an electric air conditioner compressor controller, characterized in that the device comprises:

[0014] The compressor controller's output power acquisition module is configured to determine the compressor controller's output power based on the upper limit power value sent by the host computer and the compressor controller's input power.

[0015] The compressor controller loss power determination module is configured to determine the compressor controller loss power based on the input voltage value of the compressor controller and the temperature information of the inverter.

[0016] The compressor controller's input power calculation module is configured to obtain the compressor controller's input power based on the sum of the compressor controller's output power and the compressor controller's power loss.

[0017] Thirdly, embodiments of this disclosure also provide a computer program product, which includes a computing program stored on a non-transitory computer-readable storage medium. The computer program includes program instructions that, when executed by a computer, cause the computer to perform the power regulation method for an electric air conditioning compressor controller as described in the first aspect or any implementation thereof.

[0018] The power regulation method for an electric air conditioner compressor controller in this embodiment includes determining the output power of the compressor controller based on a power upper limit value issued by a host computer and the input power of the compressor controller; determining the power loss of the compressor controller based on the input voltage value of the compressor controller and the temperature information of the inverter; and obtaining the input power of the compressor controller based on the sum of the output power and the power loss of the compressor controller. Through the solution of this disclosure, on the one hand, the accuracy of compressor controller power regulation is improved, and the compressor shutdown problem caused by low power regulation accuracy is effectively mitigated; on the other hand, by limiting the power loss of the compressor controller through a current control module, the hardware losses of the compressor controller are further reduced, and the stability of the compressor controller is improved. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is the system architecture of the operating environment for the embodiments of this disclosure;

[0021] Figure 2 A schematic flowchart illustrating a compressor controller power regulation method provided in this embodiment of the present disclosure;

[0022] Figure 3 A schematic diagram of a process for obtaining the target compressor speed provided in an embodiment of this disclosure;

[0023] Figure 4 A schematic diagram of another process for obtaining the target compressor speed provided in an embodiment of this disclosure;

[0024] Figure 5A schematic diagram of an inverter temperature rise curve provided in an embodiment of this disclosure;

[0025] Figure 6 A schematic diagram of a power regulation system provided in an embodiment of this disclosure;

[0026] Figure 7 This is a schematic diagram of a compressor controller power regulation device provided in an embodiment of the present disclosure. Detailed Implementation

[0027] The embodiments of this disclosure will now be described in detail with reference to the accompanying drawings.

[0028] The following specific examples illustrate the implementation of this disclosure. Those skilled in the art can easily understand other advantages and effects of this disclosure from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this disclosure, and not all of them. This disclosure can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this disclosure. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0029] It should be noted that various aspects of the embodiments described below are within the scope of the appended claims. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this disclosure, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using other structures and / or functionalities besides one or more of the aspects set forth herein.

[0030] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this disclosure. The drawings only show the components related to this disclosure and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0031] Furthermore, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that the described aspects can be practiced without these specific details.

[0032] In related technologies, the power of the compressor controller is usually adjusted by reducing the compressor speed in an open-loop manner. However, this method has low accuracy in adjusting the power of the compressor controller and is prone to causing the compressor to stop.

[0033] In view of one or more of the above-mentioned problems, this disclosure first provides an exemplary embodiment of a compressor controller power regulation method. The following is in conjunction with... Figure 1 The system architecture of the operating environment for this exemplary embodiment will be described.

[0034] refer to Figure 1 As shown, the compressor controller may include a power regulator, a speed controller, a torque controller, and a speed observer. The compressor controller can control the compressor.

[0035] In one embodiment, the power regulation system of this disclosure can operate at... Figure 1 In the power regulator, the power regulation system can include a compressor output power regulation module and a controller current control module. The compressor output power regulation module can determine the output power of the compressor controller based on the upper limit power value issued by the host computer and the input power of the controller. The current control module can determine the power loss of the compressor controller based on the input voltage value of the controller and the temperature information of the inverter. The power regulator can obtain the input power of the compressor controller based on the sum of the output power of the compressor controller and the power loss of the compressor controller.

[0036] As can be seen from the above, the compressor controller power regulation method in this exemplary embodiment can be derived from... Figure 1 The power regulator in the process is executed.

[0037] The following is combined with Figure 2 The power regulation method of the compressor controller is explained. Figure 2 An exemplary flow of a compressor controller power regulation method is shown, including the following steps S210 to S230:

[0038] Step S210: Determine the output power of the compressor controller based on the upper power limit value sent by the host computer and the input power of the compressor controller;

[0039] Step S220: Based on the input voltage value of the compressor controller and the temperature information of the inverter, determine the power loss of the compressor controller;

[0040] Step S230: The input power of the compressor controller is obtained based on the sum of the output power of the compressor controller and the power loss of the compressor controller.

[0041] Based on the above method, on the one hand, the power regulation accuracy of the compressor controller is improved, and the compressor shutdown problem caused by the low power regulation accuracy of the compressor controller is effectively improved; on the other hand, by limiting and determining the power loss of the compressor controller through the current control module, the hardware loss of the compressor controller is further reduced and the stability of the compressor controller is improved.

[0042] The following is about Figure 2 Each step in the process will be explained in detail.

[0043] refer to Figure 2 In step S210, the output power of the compressor controller is determined based on the upper limit power value sent by the host computer and the input power of the controller.

[0044] The compressor output power adjustment module can adjust the compressor output power; the host computer is a computer that can directly issue control commands; the upper limit of power can be the upper limit of the input power of the compressor controller calculated by the host computer based on the current compressor operating conditions, and this disclosure does not make any special limitation on the specific value of the upper limit of power.

[0045] In one implementation, determining the compressor controller's output power based on the upper power limit value issued by the host computer and the controller's input power may include the following steps: determining the target compressor speed based on the upper power limit value issued by the host computer and the current compressor controller's input power; and determining the compressor controller's output power based on the compressor speed. Determining the target compressor speed by combining the upper power limit value and the current compressor controller's input power ensures the compressor operates at its maximum speed while maintaining normal operation, thus balancing stability and efficiency during compressor operation.

[0046] In one implementation, the target compressor speed is determined based on the upper power limit value issued by the host computer and the input power of the current compressor controller, such as... Figure 3 As shown, steps S310 to S330 may be included:

[0047] Step S310: Obtain the upper limit power value sent by the host computer.

[0048] In one implementation, obtaining the power limit value issued by the host computer may include: parsing the power limit instruction issued by the host computer to obtain the power limit value.

[0049] The power limiting instruction can be an instruction issued by the host computer that includes a power limit value. This disclosure does not impose any special restrictions on the parsing method of the power limiting instruction.

[0050] In step S320, the input power of the compressor controller can be obtained by multiplying the input current of the controller by the input voltage of the controller.

[0051] After obtaining the upper limit of power and the input power of the compressor controller, in step S330, the upper limit of power and the input power of the compressor controller can be input to the first filter and the linear controller, and the target compressor speed can be obtained according to the output result of the second filter; wherein, the cutoff frequencies of the first filter and the second filter are different.

[0052] The linear controller can form a control deviation based on the given value and the actual output value, and then combine the proportional and integral of the deviation to form a control quantity to control the controlled object. This disclosure does not specifically limit the type of linear controller. For example, the linear controller may include a PI (proportional integral) controller.

[0053] In one implementation, the power upper limit value and the input power of the compressor controller are input to a first filter and a linear controller, and the target compressor speed is obtained based on the output of a second filter. Figure 4 As shown, steps S410 to S430 may be included:

[0054] Step S410: Input the upper limit of power and the input power of the compressor controller into the first filter, and determine the target proportional coefficient of the linear controller based on the comparison between the output result of the first filter and the preset gain threshold.

[0055] Step S420: Adjust the linear controller according to the target proportional coefficient to obtain the output result of the linear controller;

[0056] Step S430: Input the output of the linear controller and the preset compressor speed into the second filter, and determine the target compressor speed based on the output of the second filter.

[0057] In this exemplary embodiment, the compressor output power regulation module may include a first filter, a gain regulation module, a second filter, a PI controller, etc., wherein the cutoff frequencies of the first filter and the second filter are different, and both the cutoff frequencies of the first filter and the second filter are less than the speed loop bandwidth; wherein, the transfer function of the first filter is as shown in the following formula (1):

[0058]

[0059] Where s can represent a dummy variable, w n1 λ1 can be the cutoff frequency of the first filter, and λ1 can be the damping coefficient of the first filter.

[0060] In step S410, the upper limit of power and the input power of the compressor controller can be input into the first filter, and the output result of the filter can be compared with the preset gain threshold by the following formula (2):

[0061]

[0062] Where err can be the power error obtained from the output of the first filter, |err| is the absolute value of the power error of the first filter, Kp can be the target proportional coefficient of the obtained PI controller, K1 and K2 represent different gain coefficients, and Th1 and Th2 represent different variable gain thresholds respectively.

[0063] In step S410, after obtaining the target proportional coefficient of the PI controller, in step S420, the PI controller can be adjusted based on the target proportional coefficient Kp using the following formula (3):

[0064]

[0065] Here, s can represent the dummy variable in the transfer function, G(s) is the transfer function of the PI controller, and Ki can be the integral coefficient of the PI controller.

[0066] After obtaining the output result of the PI controller in step S420, the output result of the PI controller can be input into the second filter in step S430, so as to determine the target compressor speed based on the output result of the second filter. The transfer function of the second filter is shown in the following formula (4):

[0067]

[0068] Where s can represent a dummy variable, w n2 λ2 can be the cutoff frequency of the second filter, and λ2 can be the damping coefficient of the second filter.

[0069] based on Figure 4 This method can achieve rapid and accurate adjustment of the output power of the compressor controller, thereby improving the compressor power regulation efficiency.

[0070] Continue to refer to Figure 2 In step S220, the power loss of the compressor controller is determined based on the input voltage value of the compressor controller and the temperature information of the inverter.

[0071] An inverter is a converter that transforms DC power (batteries, storage batteries) into AC power with fixed frequency and voltage or adjustable frequency and voltage. It can be composed of an inverter bridge, control logic, and filter circuits.

[0072] In one embodiment, determining the power loss of the compressor controller based on the input voltage value of the compressor controller and the temperature information of the inverter may include the following steps: determining the upper limit of the output current of the compressor controller based on the input voltage value of the compressor controller and the temperature information of the inverter; and determining the power loss of the compressor controller based on the upper limit of the output current of the compressor controller. Determining the power loss based on the upper limit of the current obtained from the inverter's temperature information allows for adjusting the output current value to be lower than the upper limit of the current, ensuring that the inverter's temperature remains within the normal range, thereby improving the stability of the inverter.

[0073] In one embodiment, determining the upper limit of the compressor controller's output current based on the input voltage value of the compressor controller and the temperature information of the inverter may include the following steps:

[0074] The temperature rise characteristic curve of the inverter is obtained based on the input voltage value of the compressor controller and the temperature information of the inverter;

[0075] The upper limit of the compressor controller's output current is determined based on the inverter's temperature rise characteristic curve.

[0076] The inverter's temperature rise characteristic curve can be calculated based on the inverter's characteristics to reflect the relationship between the inverter's temperature and the upper limit of the output current under different output voltages. This disclosure does not specifically limit the content of the inverter's temperature rise characteristic curve. For example, the inverter's temperature rise characteristic curve can be as follows: Figure 5 As shown, the output voltage A < output voltage B < output voltage C.

[0077] Determining the upper limit of the compressor controller's output current by using the inverter's temperature rise characteristic curve can improve situations where the compressor speed is low but the compressor controller's output current is high, thereby reducing inverter hardware losses and improving inverter stability.

[0078] After obtaining the output power and loss power of the compressor controller, in step S230, the input power of the compressor controller can be obtained based on the sum of the output power and loss power of the compressor controller.

[0079] Based on the above method, the input power of the compressor controller is determined by combining the output power and loss power of the compressor controller. This can effectively balance the responsiveness and stability of the compressor controller during power regulation, thereby reducing the oscillation of the compressor speed during power regulation.

[0080] In one embodiment, the power regulation system of this disclosure can be as follows: Figure 6 As shown, the power regulation system may include filter 1, filter 2, and a PI controller. First, the power limit command from the host computer to the compressor controller is parsed to obtain the upper power limit. Then, the compressor controller's input current and input voltage are input to a multiplier to obtain the compressor controller's input power. The difference between the upper power limit and the compressor controller's input power is input to filter 1, and the power error is obtained based on the output of filter 1. Combining the power error with a variable gain strategy, the proportional gain coefficient of the PI controller is obtained. This proportional gain coefficient is used to adjust the PI controller, and the output of the PI controller and the compressor's current speed are input to filter 2. Based on the output of filter 2, a compressor speed reference value is obtained, and the compressor controller's output power is further determined based on this reference value. Simultaneously, the upper limit of the compressor controller's output current is obtained based on the compressor controller's input voltage and the inverter's temperature information, and the compressor controller's power loss is further obtained based on this upper limit. Finally, the compressor controller's input power is obtained by combining the output power and power loss, thus achieving power regulation of the compressor controller.

[0081] Exemplary embodiments of this disclosure also provide a compressor controller power regulation device. For example... Figure 7 As shown, the target tracking device 700 may include:

[0082] The compressor controller's output power acquisition module is configured to determine the compressor controller's output power based on the upper limit power value sent by the host computer and the compressor controller's input power.

[0083] The compressor controller power loss determination module is configured to determine the compressor controller power loss based on the compressor controller's input voltage value and the inverter's temperature information; and

[0084] The compressor controller's input power calculation module is configured to obtain the compressor controller's input power based on the sum of the compressor controller's output power and the compressor controller's power loss.

[0085] In one implementation, the compressor output power regulation module determines the output power of the compressor controller based on the upper power limit value sent by the host computer and the input power of the controller, which may include:

[0086] The target compressor speed is determined based on the upper limit power value issued by the host computer and the current input power of the compressor controller.

[0087] The output power of the compressor controller is determined based on the compressor speed.

[0088] In one implementation, determining the target compressor speed based on the upper power limit value issued by the host computer and the current input power of the compressor controller may include:

[0089] Obtain the upper limit of power emitted by the host computer;

[0090] The input power of the compressor controller is obtained by multiplying the input current of the compressor controller by the input voltage of the compressor controller.

[0091] The upper limit of power and the input power of the compressor controller are input to the first filter and the linear controller, and the target compressor speed is obtained according to the output result of the second filter; wherein the cutoff frequencies of the first filter and the second filter are different.

[0092] In one implementation, obtaining the upper limit value of the power emitted by the host computer may include:

[0093] The power limit command issued by the host computer is parsed to obtain the power limit value.

[0094] In one implementation, the above-mentioned inputting the upper power limit value and the input power of the compressor controller into a first filter and a linear controller, and obtaining the target compressor speed based on the output result of a second filter, may include:

[0095] The upper limit of power and the input power of the compressor controller are input into the first filter, and the target proportional coefficient of the linear controller is determined based on the comparison between the output result of the first filter and the preset gain threshold.

[0096] The linear controller is adjusted according to the target proportional coefficient to obtain the output result of the linear controller;

[0097] The output of the linear controller and the preset compressor speed are input into the second filter, and the target compressor speed is determined based on the output of the second filter.

[0098] In one implementation, determining the compressor controller's power loss based on the compressor controller's input voltage value and the inverter's temperature information may include:

[0099] The upper limit of the compressor controller's output current is determined based on the input voltage value of the compressor controller and the temperature information of the inverter;

[0100] The compressor power loss is determined based on the upper limit of the output current of the compressor controller.

[0101] In one embodiment, determining the upper limit of the compressor controller's output current based on the input voltage value of the compressor controller and the temperature information of the inverter may include:

[0102] The temperature rise characteristic curve of the inverter is obtained based on the input voltage value of the compressor controller and the temperature information of the inverter;

[0103] The upper limit of the compressor controller's output current is determined based on the inverter's temperature rise characteristic curve.

[0104] It should be noted that although several modules or units for the device used to perform actions have been mentioned in the detailed description above, this division is not mandatory. In fact, according to exemplary embodiments of this disclosure, the features and functions of two or more modules or units described above can be embodied in one module or unit. Conversely, the features and functions of one module or unit described above can be further divided and embodied by multiple modules or units.

[0105] Those skilled in the art will understand that various aspects of this disclosure can be implemented as systems, methods, or program products. Therefore, various aspects of this disclosure can be embodied in entirely hardware implementations, entirely software implementations (including firmware, microcode, etc.), or implementations combining hardware and software aspects, collectively referred to herein as “circuit,” “module,” or “system.” Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and embodiments are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the claims.

[0106] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is defined only by the appended claims.

[0107] The above description is merely a specific embodiment of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A method for power regulation of an electric air-conditioning compressor controller, characterized in that, The method comprises: determining the output power of the compressor controller based on the upper limit value of power issued by the host computer and the input power of the compressor controller; determining the loss power of the compressor controller based on the input voltage value of the compressor controller and the temperature information of the inverter; and determining the input power of the compressor controller based on the sum of the output power of the compressor controller and the loss power of the compressor controller. The method comprises: determining the target compressor speed according to the upper limit value of power issued by the host computer and the input power of the current compressor controller; and determining the output power of the compressor controller according to the compressor speed. The method comprises: obtaining the upper limit value of power issued by the host computer; obtaining the input power of the compressor controller according to the product of the input current of the compressor controller and the input voltage of the compressor controller; and inputting the upper limit value of power and the input power of the compressor controller into a first filter and a linear controller, and obtaining the target compressor speed according to the output result of a second filter; wherein the cut-off frequencies of the first filter and the second filter are different. The method comprises: inputting the upper limit value of power and the input power of the compressor controller into a first filter, and determining the target proportional coefficient of a linear controller according to the comparison result of the output result of the first filter and a preset gain threshold; adjusting the linear controller according to the target proportional coefficient to obtain the output result of the linear controller; and inputting the output result of the linear controller and a preset compressor speed into the second filter, and determining the target compressor speed based on the output result of the second filter. The method comprises:

2. The method of claim 1, wherein, parsing the power limit instruction issued by the host computer to obtain the upper limit value of power. The method comprises:

3. The method of claim 1, wherein, determining the output current upper limit value of the compressor controller according to the input voltage value of the compressor controller and the temperature information of the inverter; and determining the loss power of the compressor controller based on the output current upper limit value of the compressor controller. The method comprises:

4. The method of claim 3, wherein, obtaining the temperature rise characteristic curve of the inverter based on the input voltage value of the compressor controller and the temperature information of the inverter; determining the output current upper limit value of the compressor controller according to the temperature rise characteristic curve of the inverter. The device for applying the method of any one of claims 1-4 comprises:

5. An apparatus for power conditioning of an electric air-conditioning compressor controller, characterized by, ​ The output power acquisition module of the compressor controller is configured to determine the output power of the compressor controller based on the power upper limit value sent by the host computer and the input power of the compressor controller. The loss power determination module of the compressor controller is configured to determine the loss power of the compressor controller based on the input voltage value of the compressor controller and the temperature information of the inverter. The input power calculation module of the compressor controller is configured to obtain the input power of the compressor controller based on the sum of the output power of the compressor controller and the loss power of the compressor controller.

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