Method and system for automatically balancing temperature of multiple power modules of an electronic load

Abstract

This invention discloses a method and system for automatically balancing the temperature of multiple power modules in an electronic load. The method involves detecting the temperature signal of each power module and converting it into a voltage signal; processing the voltage signals corresponding to the temperature signals of all power modules to obtain a comprehensive temperature-voltage signal; obtaining a voltage correction signal based on the voltage signals corresponding to the temperature signals of each power module and the comprehensive temperature-voltage signal; receiving a drive signal; and using the voltage correction signal to correct the drive signal, resulting in a corrected signal that controls the operation of the power modules. This invention comprehensively processes the temperature of all power modules and dynamically adjusts the load power of all power modules to ensure that the temperature values ​​of all power modules approach equilibrium while maintaining a relatively constant total load power of the entire unit. This ensures that the maximum temperature of the entire unit meets requirements. Furthermore, lower airflow fans can be selected to reduce overall cost, power consumption, and noise.

Description

Technical Field

[0001] This invention belongs to the field of power module temperature regulation technology, specifically, it relates to a method and system for automatically balancing the temperature of multiple power modules of electronic loads. Background Technology

[0002] Currently, the power range of electronic load devices is quite large, with single units reaching 60kW or even higher. Due to their nature of dissipating energy by adjusting the impedance of power units, the power of a single power module is generally not very high, but the size of the heat sink is relatively large. Taking a common high-power electronic load as an example: a single power module typically has a power of around 2kW and occupies a space of 13cm*13cm*60cm (width*height*depth). This means that a 60kW unit would need to be installed in a standard rack with a width of 426mm, requiring 10 racks of 3 power modules each, resulting in a total height exceeding 1.3 meters. The space between 30 power modules is significant. Due to factors such as rack placement limitations, the influence of nearby obstacles, differences in individual fan airflow, and the general tendency of heat to rise in the natural environment, the heat dissipation conditions of these power modules vary, inevitably leading to temperature differences between them.

[0003] To ensure the safe operation of the entire device, heat dissipation is typically designed based on the power module with the highest operating temperature, or additional cooling fans are added to the hottest areas for auxiliary cooling. Both methods obviously increase costs, and higher power and more numerous fans also result in greater noise during operation.

[0004] Patent CN202211393357, entitled "An Electronic Load Power Limiting Circuit with Automatic Temperature Control Function," discloses a scheme for controlling the operating state of a power module based on the NTC sampling temperature. When the NTC sampling temperature is higher than the maximum temperature limit, the power module circuit current drops to zero. When the NTC sampling temperature is lower than the maximum temperature limit, the power module circuit current increases as the sampling temperature decreases until it returns to maximum power operation. This patent focuses more on the protection of individual power modules and cannot coordinate the control of the entire machine, thus failing to guarantee the overall power output.

[0005] The information disclosed in this background section is only intended to enhance the understanding of the background technology of this application, and therefore may include prior art that is not known to those skilled in the art. Summary of the Invention

[0006] This invention proposes a method and system for automatically balancing the temperature of multiple power modules in an electronic load, in order to solve the technical problem that existing solutions can only protect individual power modules and cannot coordinate the overall temperature and ensure the power of the whole machine.

[0007] To achieve the above-mentioned invention / design objectives, the present invention adopts the following technical solution: A method for automatically balancing the temperature of multiple power modules in an electronic load, the electronic load comprising multiple power modules, the method comprising: Detect the temperature signal of each power module and convert the temperature signal into a voltage signal; The voltage signals corresponding to the temperature signals of all power modules are processed to obtain a comprehensive temperature-voltage signal. A voltage correction signal is obtained based on the voltage signal corresponding to the temperature signal of each power module and the combined temperature and voltage signal. It receives the drive signal, corrects the drive signal with a voltage correction signal, and then controls the operation of the power module with the corrected signal.

[0008] The method described above for automatically balancing the temperature of multiple power modules of electronic load involves averaging the voltage signals corresponding to the temperature signals of all power modules to obtain an average temperature-voltage signal. The difference between the average temperature voltage signal and the voltage signal corresponding to the temperature signal of each power module is used as the voltage correction signal.

[0009] The method described above for automatically balancing the temperature of multiple power modules of electronic load involves inverting and averaging the voltage signals corresponding to the temperature signals of all power modules to obtain the inverted average temperature and voltage signals. The sum of the inverted average temperature voltage signal and the voltage signal corresponding to the temperature signal of each power module is used as the voltage correction signal.

[0010] The method described above for automatically balancing the temperature of multiple power modules of electronic load involves inverting the voltage signals corresponding to the temperature signals of all power modules according to a set ratio to obtain a comprehensive temperature and voltage signal. The sum of the overall temperature-voltage signal and the voltage signal corresponding to the temperature signal of each power module is used as the voltage correction signal.

[0011] As described above, the method for automatically balancing the temperature of multi-power electronic load modules uses a correction signal that is the sum of a voltage correction signal and a drive signal.

[0012] A system for automatically balancing the temperature of multiple power modules in an electronic load, the electronic load comprising multiple power modules, the system comprising: The temperature-to-voltage conversion unit detects the temperature signal of each power module and converts the temperature signal into a voltage signal. The integrated temperature and voltage processing unit processes the voltage signals corresponding to the temperature signals of all power modules to obtain the integrated temperature and voltage signal. The driving voltage correction unit obtains a voltage correction signal based on the voltage signal corresponding to the temperature signal of each power module and the comprehensive temperature and voltage signal. The power module drive signal correction unit receives the drive signal and controls the operation of the power module by correcting the drive signal with a voltage correction signal.

[0013] In the system for automatically balancing the temperature of multiple power modules of electronic load as described above, the integrated temperature and voltage processing unit is an average temperature and voltage processing unit that averages the voltage signals corresponding to the temperature signals of all power modules to obtain an average temperature and voltage signal. The driving voltage correction unit uses the difference between the average temperature voltage signal and the voltage signal corresponding to the temperature signal of each power module as the voltage correction signal.

[0014] As described above, in the system for automatically balancing the temperature of multiple power modules of electronic load, the integrated temperature and voltage processing unit is an inverted average temperature and voltage processing unit, which inverts and averages the voltage signals corresponding to the temperature signals of all power modules to obtain the inverted average temperature and voltage signal. The driving voltage correction unit uses the sum of the inverted average temperature voltage signal and the voltage signal corresponding to the temperature signal of each power module as the voltage correction signal.

[0015] In the system for automatically balancing the temperature of multiple power modules of electronic load as described above, the integrated temperature and voltage processing unit performs phase inversion processing on the voltage signals corresponding to the temperature signals of all power modules according to a set ratio to obtain the integrated temperature and voltage signal. The driving voltage correction unit uses the sum of the integrated temperature voltage signal and the voltage signal corresponding to the temperature signal of each power module as the voltage correction signal.

[0016] In the system described above for automatically balancing the temperature of multiple power modules of an electronic load, the power module drive signal correction unit receives the drive signal and uses the sum of the voltage correction signal and the drive signal as a correction signal to control the operation of the power module.

[0017] Compared with existing technologies, the advantages and positive effects of this invention are as follows: The method for automatically balancing the temperature of multiple power modules in an electronic load includes: detecting the temperature signal of each power module and converting the temperature signal into a voltage signal; comprehensively processing the voltage signals corresponding to the temperature signals of all power modules to obtain a comprehensive temperature-voltage signal; obtaining a voltage correction signal based on the voltage signal corresponding to the temperature signal of each power module and the comprehensive temperature-voltage signal; receiving a drive signal, and controlling the operation of the power modules with the correction signal obtained by correcting the drive signal using the voltage correction signal. This invention comprehensively processes the temperature of all power modules and dynamically adjusts the load power of all power modules to make the temperature values ​​of all power modules approach equilibrium, ensuring that the maximum temperature of the entire unit meets the requirements. Furthermore, a lower airflow fan can be selected to reduce the overall cost, power consumption, and noise.

[0018] This invention relates to a system for automatically balancing the temperature of multiple power modules in an electronic load. The system includes: a temperature-to-voltage conversion unit that detects the temperature signal of each power module and converts it into a voltage signal; a comprehensive temperature-voltage processing unit that processes the voltage signals corresponding to the temperature signals of all power modules to obtain a comprehensive temperature-voltage signal; a drive voltage correction unit that obtains a voltage correction signal based on the voltage signal corresponding to the temperature signal of each power module and the comprehensive temperature-voltage signal; and a power module drive signal correction unit that receives the drive signal and controls the operation of the power modules by correcting the drive signal with the corrected signal obtained from the voltage correction signal. This invention comprehensively processes the temperature of all power modules and dynamically adjusts the load power of all power modules to make the temperature values ​​of all power modules approach equilibrium, ensuring that the maximum temperature of the entire unit meets the requirements. Furthermore, a lower airflow fan can be selected to reduce the overall cost, power consumption, and noise.

[0019] Other features and advantages of the present invention will become clearer after reading the detailed embodiments of the invention in conjunction with the accompanying drawings. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a flowchart of a specific embodiment of the present invention.

[0022] Figure 2 This is a schematic diagram of a specific embodiment of the present invention.

[0023] Figure 3 This is a schematic diagram of another specific embodiment of the present invention.

[0024] Figure 4 This is a schematic diagram of another specific embodiment of the present invention. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] In the description of this invention, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0027] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. In the description of embodiments, specific features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0028] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0029] In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0030] A method and system for automatically balancing the temperature of multiple power modules in an electronic load. The electronic load includes multiple power modules. The temperature signal of each power module is detected and processed in a comprehensive manner to adjust the operation of the power modules, thereby achieving the effect of balancing the temperature of the multiple power modules in the electronic load and ensuring the load power of the whole machine.

[0031] By detecting the temperature of the power modules, the load impedance of each power module is actively adjusted so that the power modules with lower temperatures can bear higher load power, and the power modules with higher temperatures can bear lower load power. Under dynamic balance, the temperature difference between all power modules eventually approaches zero.

[0032] The method for automatically balancing the temperature of multi-power electronic load modules is explained below: The method for automatically balancing the temperature of multi-power electronic load modules includes the following steps: The temperature signal of each power module is detected and converted into a voltage signal.

[0033] The voltage signals corresponding to the temperature signals of all power modules are processed to obtain a comprehensive temperature-voltage signal.

[0034] A voltage correction signal is obtained based on the voltage signal corresponding to the temperature signal of each power module and the combined temperature and voltage signal. It receives the drive signal, corrects the drive signal with a voltage correction signal, and then controls the operation of the power module with the corrected signal.

[0035] The correction signal is the sum of the voltage correction signal and the drive signal.

[0036] In some embodiments, the method for comprehensively processing the voltage signals corresponding to the temperature signals of all power modules is averaging.

[0037] The difference between the temperature value of a single power module of the electronic load and the average temperature value of all power modules is proportionally corrected, and then the load power of the module is reversed to achieve the effect of multi-module temperature balance.

[0038] like Figure 1 As shown, the method for automatically balancing the temperature of multi-power electronic load modules includes the following steps: S1. Detect the temperature signal of each power module and convert the temperature signal into a voltage signal.

[0039] S2. Average the voltage signals corresponding to the temperature signals of all power modules to obtain the average temperature voltage signal.

[0040] S3. Use the difference between the average temperature voltage signal and the voltage signal corresponding to the temperature signal of each power module as the voltage correction signal.

[0041] S4. Receive the drive signal, and use the voltage correction signal to correct the drive signal to control the operation of the power module.

[0042] In some other embodiments, the method for comprehensively processing the voltage signals corresponding to the temperature signals of all power modules is inverse averaging.

[0043] The average temperature and voltage signal is obtained by inverting the voltage signal corresponding to the temperature signal of all power modules and then averaging it. The sum of the inverted average temperature voltage signal and the voltage signal corresponding to the temperature signal of each power module is used as the voltage correction signal.

[0044] In some other embodiments, the method for comprehensively processing the voltage signals corresponding to the temperature signals of all power modules is to invert them according to a set ratio.

[0045] The voltage signals corresponding to the temperature signals of all power modules are inverted according to a set ratio to obtain a comprehensive temperature and voltage signal. The sum of the overall temperature-voltage signal and the voltage signal corresponding to the temperature signal of each power module is used as the voltage correction signal.

[0046] like Figure 2 As shown in the figure, this embodiment also proposes a system for automatically balancing the temperature of multiple power modules in an electronic load, the electronic load including multiple power modules.

[0047] The power consumption units of each power module are mounted on the heat sink. Multiple power modules are connected to external drive signals through a control bus. The drive signals input to the control bus are corrected and then input to the power consumption units of each module to control their respective load impedance.

[0048] The system includes: The temperature-to-voltage conversion unit detects the temperature signal of each power module and converts the temperature signal into a voltage signal. The integrated temperature and voltage processing unit processes the voltage signals corresponding to the temperature signals of all power modules to obtain the integrated temperature and voltage signal. The driving voltage correction unit obtains a voltage correction signal based on the voltage signal corresponding to the temperature signal of each power module and the comprehensive temperature and voltage signal. The power module drive signal correction unit receives the drive signal and controls the operation of the power module by correcting the drive signal with a voltage correction signal.

[0049] The power module drive signal correction unit receives the drive signal and uses the sum of the voltage correction signal and the drive signal as the correction signal to control the operation of the power module.

[0050] exist Figure 3In this example, the integrated temperature and voltage processing unit is an average temperature and voltage processing unit, which averages the voltage signals corresponding to the temperature signals of all power modules to obtain the average temperature and voltage signal. The drive voltage correction unit is a voltage difference conversion unit that uses the difference between the average temperature voltage signal and the voltage signal corresponding to the temperature signal of each power module as the voltage correction signal.

[0051] Temperature-to-voltage conversion unit: Converts the temperature value of the power module heat sink into a voltage signal. It has a single temperature linearity and can have either a positive or negative temperature coefficient. It needs to work in conjunction with subsequent circuits to be effective.

[0052] This unit includes a temperature sensor and its voltage conditioning circuit. The temperature sensor is mounted on the surface of the heat sink in a direct contact or indirect contact manner. It can be a thermistor (resistance value is unipolar related to temperature) or a transistor (PN junction forward conduction voltage is unipolar related to temperature). The voltage conditioning circuit can adjust the polarity and amplitude of the output voltage to cooperate with the function of the overall feedback circuit.

[0053] Average temperature and voltage processing unit: Converts multiple input voltage signals into an average voltage and outputs it to the bus.

[0054] Voltage difference conversion unit: It has two input ports, accepting two voltage signals; the output voltage signal is proportional to the difference between the two input voltage signals. The magnitude and polarity of this "fixed ratio" can be adjusted to match the function of the overall feedback circuit.

[0055] The drive voltage correction unit has two input ports, accepting two voltage signals. The output is the voltage signal obtained by aliasing the two input signals using a preset ratio. Both the aliasing ratio and polarity can be adjusted to complement the overall feedback circuit functionality.

[0056] exist Figure 3 In the embodiments, the principle of the present invention is explained by taking two power modules, which have identical circuit design and component selection.

[0057] In the temperature-to-voltage conversion unit, within the upper power module, a negative temperature coefficient thermistor R1_1 is mounted on a heat sink. One end of R1_1 is connected to the external power supply Ve, and the other end is connected to one end of a fixed resistor R2_1. The other end of R2_1 is connected to the reference ground GND. The connection point of R1_1 and R2_1 is also connected to the input terminal of a voltage follower circuit composed of an operational amplifier. The output voltage of the voltage follower circuit is V_T_1.

[0058] ; Clearly, as the heatsink temperature rises, the resistance of R1 decreases, the voltage at the connection point of R1 and R2 increases, and the output voltage of the voltage follower increases accordingly. Therefore, this unit is a temperature-to-voltage converter with a positive temperature coefficient.

[0059] Although the resistance of a typical negative temperature coefficient varistor is not strictly linear with temperature, for ease of description, the relationship between V_T_1 and the temperature T1 of the heat sink above can be approximated by equation (2): ; Of course, replacing R1 with a positive temperature coefficient thermistor, swapping the positions of R1 and R2, changing the polarity of the external power supply, or changing the polarity and amplification factor of the follower circuit all fall within the protection scope of the temperature-voltage conversion unit in this embodiment.

[0060] Correspondingly, in the lower power module, the relationship between V_T_2 and the lower heatsink temperature T2 can be approximately expressed as the following formula: ; In the average temperature-voltage processing unit, the voltage signals output by the temperature-voltage conversion units of the two power modules are each connected to a point through current-sharing resistors R3_1 and R3_2 of the same resistance value. The connection point is connected to the input terminal of the voltage follower. The output voltage V_Tm is the average value of the output voltage signals of the two power modules.

[0061] ; As the number of power modules increases, the voltage signal output by each power module is connected to the input of the voltage follower through its respective current sharing resistor R3_N. The output of the voltage follower is the average voltage output by the temperature-to-voltage conversion unit of all power modules.

[0062] The voltage differential conversion unit contains a standard differential circuit consisting of an operational amplifier and resistors R4a, R5a, R4b, and R5b (where R4a = R4b, R5a = R5b, and their values ​​are R4 and R5 respectively). The temperature-to-voltage conversion signal output by the power module itself is input to the inverting input of the differential circuit, while the average voltage output by the average temperature-voltage processing unit is connected to the non-inverting input of the differential circuit. Ultimately, the output voltage of the differential circuit is the difference between the average temperature voltage and the power module's own temperature voltage, called the temperature correction voltage Vadj_1.

[0063] ; Substituting equation (3) into equation (4) yields: ; Substituting equation (2) into equation (5) yields: ; In this embodiment, the drive voltage correction unit uses a non-inverting proportional summing circuit. It has an operational amplifier with two input signals: one is the temperature correction voltage Vadj_1, which is input to the non-inverting input of the operational amplifier through the R6_1 (resistance value R6) branch; the other is the externally input drive voltage V_REF, which is input through the R7_1 (resistance value R7) branch and is also connected to the non-inverting input of the operational amplifier. The inverting input and output of the operational amplifier are directly connected to form a non-inverting follower circuit, and the output signal is the power consumption unit drive signal V_REF_1.

[0064] ; Substituting equation (6) into equation (7) yields: ; Obviously, the power consumption unit drive signal V_REF_1 is the externally input V_REF signal after being corrected by a fixed ratio, and then superimposed with the temperature difference (T2 - T1) between itself and another power module after being corrected by a fixed ratio. By changing the resistance values ​​R4, R5, R6, R7 and the conversion coefficient K of the temperature-to-voltage conversion unit, the influence of the temperature difference on the signal V_REF_1 can be adjusted.

[0065] In this embodiment, the externally input drive signal V_REF is a positive voltage, and the load power of the power consumption unit increases as the voltage increases. Under this condition, the load power of the power consumption unit of this power module will increase when the temperature of this module T1 is lower than that of another module T2; conversely, it will decrease when T1 is higher than T2.

[0066] Accordingly, since the hardware design is the same across all power modules, in the lower power module, R4a_2 and R4b_2 both have the value of R4, R5a_2 and R5b_2 both have the value of R5, R6_2 has the value of R6, and R7_2 has the value of R7. Therefore, the following can be calculated: .

[0067] This embodiment has the following advantages: 1) In a multi-power module electronic load, the temperature values ​​of each power module tend to be balanced after being under load for a long time. Since the total load power of the whole machine remains unchanged, the highest temperature of all power modules will be lower than the highest temperature without using this embodiment. Therefore, in terms of fan selection, products with lower air volume can be selected, which can reduce the overall cost, power consumption and operating noise.

[0068] 2) Due to their large size, high-power electronic loads face many limitations in placement within the user's actual operating environment, often resulting in uneven heat dissipation on both sides, such as one side having an air conditioner while the other side is close to a wall. Using this embodiment can reduce the risk of overheating alarms and even partial module damage caused by such situations.

[0069] 3) For high-power electronic loads, cooling fans are typically installed at the power module's exhaust port. Since power modules operate at very high temperatures under heavy loads, these fans need to operate at high temperatures for extended periods. This can negatively impact the lifespan and performance of magnetic components such as the motor and Hall effect sensors within the fan, causing them to slow down and further accelerating the overall temperature rise of the power module. This can eventually lead to overheating alarms or even damage. Using this embodiment effectively reduces the likelihood of this situation by suppressing the temperature rise of the highest-temperature power module.

[0070] exist Figure 4 In this example, the integrated temperature and voltage processing unit is an inverted average temperature and voltage processing unit, which inverts and averages the voltage signals corresponding to the temperature signals of all power modules to obtain the inverted average temperature and voltage signal. The drive voltage correction unit uses the sum of the inverted average temperature voltage signal and the voltage signal corresponding to the temperature signal of each power module as the voltage correction signal.

[0071] In this embodiment, the thermistor of the temperature-to-voltage conversion unit has a positive temperature coefficient, and the relationship between V_T_1 and the temperature T1 of the upper heat sink can be approximately expressed as equation (9): ; Correspondingly, in the lower power module, the relationship between V_T_2 and the lower heatsink temperature T2 can be approximately expressed as the following formula: ; The inverting average temperature voltage processing unit includes an inverting proportional amplifier circuit with resistor values ​​R10=R11, which converts the V_Tm signal into V_Tm′ with opposite polarity. ; The drive voltage correction unit is a summing circuit involving resistors R8 and R9. It performs a proportional summation operation on the temperature voltage signal V_T of this power module and the inversely proportional average temperature voltage signal V_Tm' to obtain the temperature correction voltage Vadj_1. ; Substituting equation (10) into equation (11), we get: ; Substituting equation (3) into equation (12), we get: ; Equation (13) can be rearranged to obtain: ; Substituting equation (9) into equation (14), we get: ; Comparing equation (15) with equation (6) of Example 1, both circuits have the same characteristics and can achieve the effect of automatically balancing the temperature of the multi-power module in this technology.

[0072] Correspondingly, .

[0073] In some other embodiments, the integrated temperature and voltage processing unit inverts the voltage signals corresponding to the temperature signals of all power modules according to a set ratio to obtain the integrated temperature and voltage signal. The drive voltage correction unit uses the sum of the integrated temperature voltage signal and the voltage signal corresponding to the temperature signal of each power module as the voltage correction signal.

[0074] The set ratio can be adjusted by adjusting the values ​​of resistors R10 and R11.

[0075] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions claimed by the present invention.

Claims

1. A method for automatically balancing the temperature of multiple power modules in an electronic load, wherein the electronic load comprises multiple power modules, characterized in that, The method includes: Detect the temperature signal of each power module and convert the temperature signal into a voltage signal; The voltage signals corresponding to the temperature signals of all power modules are processed to obtain a comprehensive temperature-voltage signal. A voltage correction signal is obtained based on the voltage signal corresponding to the temperature signal of each power module and the combined temperature and voltage signal. It receives the drive signal, corrects the drive signal with a voltage correction signal, and then controls the operation of the power module with the corrected signal.

2. The method for automatically balancing the temperature of multi-power electronic load modules according to claim 1, characterized in that, The average temperature-voltage signal is obtained by averaging the voltage signals corresponding to the temperature signals of all power modules. The difference between the average temperature voltage signal and the voltage signal corresponding to the temperature signal of each power module is used as the voltage correction signal.

3. The method for automatically balancing the temperature of multi-power electronic load modules according to claim 1, characterized in that, The average temperature and voltage signal is obtained by inverting the voltage signal corresponding to the temperature signal of all power modules and then averaging it. The sum of the inverted average temperature voltage signal and the voltage signal corresponding to the temperature signal of each power module is used as the voltage correction signal.

4. The method for automatically balancing the temperature of multi-power electronic load modules according to claim 1, characterized in that, The voltage signals corresponding to the temperature signals of all power modules are inverted according to a set ratio to obtain a comprehensive temperature and voltage signal. The sum of the overall temperature-voltage signal and the voltage signal corresponding to the temperature signal of each power module is used as the voltage correction signal.

5. The method for automatically balancing the temperature of a multi-power electronic load module according to any one of claims 1-4, characterized in that, The correction signal is the sum of the voltage correction signal and the drive signal.

6. A system for automatically balancing the temperature of multiple power modules in an electronic load, wherein the electronic load comprises multiple power modules, characterized in that, The system includes: The temperature-to-voltage conversion unit detects the temperature signal of each power module and converts the temperature signal into a voltage signal. The integrated temperature and voltage processing unit processes the voltage signals corresponding to the temperature signals of all power modules to obtain the integrated temperature and voltage signal. The driving voltage correction unit obtains a voltage correction signal based on the voltage signal corresponding to the temperature signal of each power module and the comprehensive temperature and voltage signal. The power module drive signal correction unit receives the drive signal and controls the operation of the power module by correcting the drive signal with a voltage correction signal.

7. The system for automatically balancing the temperature of multi-power electronic load modules according to claim 6, characterized in that, The integrated temperature and voltage processing unit is an average temperature and voltage processing unit that averages the voltage signals corresponding to the temperature signals of all power modules to obtain the average temperature and voltage signal. The driving voltage correction unit uses the difference between the average temperature voltage signal and the voltage signal corresponding to the temperature signal of each power module as the voltage correction signal.

8. The system for automatically balancing the temperature of multi-power electronic load modules according to claim 6, characterized in that, The integrated temperature and voltage processing unit is an inverted average temperature and voltage processing unit that inverts and averages the voltage signals corresponding to the temperature signals of all power modules to obtain the inverted average temperature and voltage signal. The driving voltage correction unit uses the sum of the inverted average temperature voltage signal and the voltage signal corresponding to the temperature signal of each power module as the voltage correction signal.

9. The system for automatically balancing the temperature of multi-power electronic load modules according to claim 8, characterized in that, The integrated temperature and voltage processing unit inverts the voltage signals corresponding to the temperature signals of all power modules according to a set ratio to obtain the integrated temperature and voltage signal. The driving voltage correction unit uses the sum of the integrated temperature voltage signal and the voltage signal corresponding to the temperature signal of each power module as the voltage correction signal.

10. The system for automatically balancing the temperature of multi-power electronic load modules according to any one of claims 6-9, characterized in that, The power module drive signal correction unit receives the drive signal and uses the sum of the voltage correction signal and the drive signal as a correction signal to control the operation of the power module.

Images