Dc-dc converter test system and test method

Abstract

The present disclosure relates to a DC-DC converter test system and a test method, and relates to the field of DC-DC converters. The test system comprises a DC-DC converter and a controller, the controller is connected with the DC-DC converter, the DC-DC converter comprises a plurality of electric energy acquisition modules and a plurality of electric energy feedback modules; the controller is used for sending a start instruction to the DC-DC converter when receiving a user-triggered start test instruction; the DC-DC converter is used for adjusting the output voltage of the electric energy acquisition module and the output current of the electric energy feedback module according to the pre-determined configuration parameters after receiving the start test instruction sent by the controller; the controller is further used for determining the test result of the DC-DC converter according to the output voltage and the output current of the DC-DC converter, and displaying the test result. In this way, the electric energy circulates inside the DC-DC converter, reduces the test requirements, reduces the test cost, and improves the test efficiency.

Description

Technical Field

[0001] This disclosure relates to the field of DC-DC converters, and more specifically, to a DC-DC converter testing system and testing method. Background Technology

[0002] In the industrial manufacturing sector, many industrial devices require DC power. Traditional DC power supply provides DC power to industrial equipment through DC distribution cabinets or secondary power supplies. In some industrial sectors, certain industrial equipment has specific requirements for the current and voltage of the DC power supply. For example, in the clean energy sector, electrolyzers are used to electrolyze water to produce hydrogen. These electrolyzers do not have high requirements for DC voltage, for example, the DC voltage can be 200V, but the DC current requirements are very high, for example, the DC current can be 100A. Based on this, the electrolyzer requires a dedicated DC-DC converter to provide the corresponding DC power supply.

[0003] To ensure the performance and safety of DC-DC converters, they need to be tested during factory testing or routine maintenance. The relevant technologies have high requirements for the testing equipment and facilities of DC-DC converters, requiring connection to corresponding electrical equipment, such as electrolyzers in the hydrogen production field. Furthermore, the testing process consumes a large amount of electrical energy, resulting in high testing costs and low testing efficiency. Summary of the Invention

[0004] To overcome the problems existing in related technologies, this disclosure provides a DC-DC converter testing system and testing method.

[0005] According to a first aspect of the present disclosure, a DC-DC converter testing system is provided. The testing system includes a DC-DC converter and a controller, the controller being connected to the DC-DC converter. The DC-DC converter includes multiple power acquisition modules and multiple power feedback modules.

[0006] The controller is configured to send a start command to the DC-DC converter upon receiving a start test command triggered by a user.

[0007] The DC-DC converter is used to adjust the output voltage of the power acquisition module and the output current of the power feedback module according to the predetermined configuration parameters after receiving the start command sent by the controller, so that the difference between the output voltage and the preset rated voltage is less than or equal to the preset voltage threshold, and the difference between the output current and the preset rated current is less than or equal to the preset current threshold.

[0008] The controller is also configured to determine the test results of the DC-DC converter based on the output voltage and output current of the DC-DC converter, and to display the test results.

[0009] Optionally, the test system further includes a power conversion device, which is connected to the controller and the DC-DC converter respectively;

[0010] The controller is further configured to send a configuration command to the power conversion device before sending the start command to the DC-DC converter;

[0011] The power conversion device is used to convert grid power into DC power that meets preset voltage conditions according to the configuration instructions, and to use the DC power to power the DC-DC converter.

[0012] Optionally, the power conversion device includes:

[0013] Pulse width adjustable rectifier cabinet; or

[0014] A voltage regulator and a diode rectifier bridge, wherein the voltage regulator is connected to the mains power supply and the diode rectifier bridge, respectively; or...

[0015] A soft-start circuit and a diode rectifier bridge are provided, wherein the soft-start circuit is connected to the mains power supply and the diode rectifier bridge, respectively.

[0016] Optionally, the controller is further configured to send a parameter configuration command to the DC-DC converter before sending a start command to the DC-DC converter;

[0017] The DC-DC converter is also used to determine the configuration parameters according to the parameter configuration instructions.

[0018] Optionally, the configuration parameters include a first adjustment parameter, and the power acquisition module includes a voltage closed-loop controller and a first current closed-loop controller;

[0019] The DC-DC converter is further configured to adjust the output voltage according to the first adjustment parameter via the voltage closed-loop controller and the first current closed-loop controller.

[0020] Optionally, the configuration parameters further include a second adjustment parameter, and the power feedback module includes a second current closed-loop controller;

[0021] The DC-DC converter is further configured to adjust the output current according to the second adjustment parameter via the second current closed-loop controller.

[0022] Optionally, the voltage closed-loop controller is a proportional-integral controller or a sliding mode controller, and both the first current closed-loop controller and the second current closed-loop controller are proportional-integral controllers or sliding mode controllers.

[0023] Optionally, the test system further includes a discharge circuit connected to the DC-DC converter;

[0024] The discharge circuit is used to discharge the residual voltage of the DC-DC converter upon receiving a test completion command triggered by the user.

[0025] According to a second aspect of the present disclosure, a DC-DC converter testing method is provided, which is applied to a DC-DC converter testing system. The testing system includes the DC-DC converter and a controller, the controller being connected to the DC-DC converter. The DC-DC converter includes multiple power acquisition modules and multiple power feedback modules. The method includes:

[0026] When the controller receives a start test command triggered by the user, the controller receives the start command sent by the controller.

[0027] After receiving the start command sent by the controller, the output voltage of the power acquisition module and the output current of the power feedback module are adjusted according to the predetermined configuration parameters, so that the difference between the output voltage and the preset rated voltage is less than or equal to the preset voltage threshold, and the difference between the output current and the preset rated current is less than or equal to the preset current threshold.

[0028] Optionally, the method further includes:

[0029] Receive parameter configuration instructions sent by the controller;

[0030] The configuration parameters are determined according to the parameter configuration instructions.

[0031] The technical solutions provided by the embodiments of this disclosure may include the following beneficial effects:

[0032] The test system described in this disclosure includes a DC-DC converter and a controller. The controller is connected to the DC-DC converter, which includes multiple power acquisition modules and multiple power feedback modules. The controller is used to send a start command to the DC-DC converter upon receiving a user-triggered start test command. Upon receiving the start command from the controller, the DC-DC converter adjusts the output voltage of the power acquisition modules and the output current of the power feedback modules according to predetermined configuration parameters. The controller is also used to determine the test result of the DC-DC converter based on its output voltage and output current, and to display the test result. In this way, electrical energy can circulate within the DC-DC converter, reducing the requirements for test sites and equipment facilities, thereby reducing test costs and improving test efficiency.

[0033] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure.

[0034] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0035] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure, but do not constitute a limitation thereof.

[0036] Throughout the accompanying drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic, and the originals and elements are not necessarily drawn to scale.

[0037] Figure 1 This is a block diagram illustrating a DC-DC converter test system according to an exemplary embodiment.

[0038] Figure 2 This is a logic block diagram of an electrical energy harvesting module according to an exemplary embodiment.

[0039] Figure 3 This is a logic block diagram of an electrical energy feedback module according to an exemplary embodiment.

[0040] Figure 4 This is a block diagram illustrating another DC-DC converter test system according to an exemplary embodiment.

[0041] Figure 5 This is a block diagram illustrating yet another DC-DC converter test system according to an exemplary embodiment.

[0042] Figure 6 This is a flowchart illustrating a DC-DC converter testing method according to an exemplary embodiment.

[0043] Figure 7 This is a flowchart illustrating another DC-DC converter testing method according to an exemplary embodiment. Detailed Implementation

[0044] Embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings. While some embodiments of this disclosure are shown in the drawings, it should be understood that this disclosure can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this disclosure. It should be understood that the accompanying drawings and embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of protection of this disclosure.

[0045] It should be understood that the steps described in the method embodiments of this disclosure may be performed in different orders and / or in parallel. Furthermore, the method embodiments may include additional steps and / or omit the steps shown. The scope of this disclosure is not limited in this respect.

[0046] The term "comprising" and its variations as used herein are open-ended inclusions, meaning "including but not limited to". The term "based on" means "at least partially based on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". Definitions of other terms will be given in the description below.

[0047] It should be noted that the concepts of "first" and "second" mentioned in this disclosure are used only to distinguish different devices, modules or units, and are not used to limit the order of functions performed by these devices, modules or units or their interdependencies.

[0048] It should be noted that the terms "a" and "a plurality of" used in this disclosure are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0049] The names of messages or information exchanged between multiple devices in the embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of such messages or information.

[0050] It should be noted that all actions involving the acquisition of signals, information, or data in this application are carried out in compliance with the relevant data protection laws and policies of the country where the application is located, and with the authorization granted by the owner of the relevant device.

[0051] The present disclosure will now be described in conjunction with specific embodiments.

[0052] Figure 1 This is a block diagram illustrating a DC-DC converter test system 100 according to an exemplary embodiment, such as... Figure 1 As shown, the test system includes a DC-DC converter 101 and a controller 102. The controller 102 is connected to the DC-DC converter 101, which includes multiple power acquisition modules and multiple power feedback modules.

[0053] The controller 102 is used to send a start command to the DC-DC converter 101 upon receiving a start test command triggered by a user.

[0054] DC-DC converter 101 is used to adjust the output voltage of the power acquisition module and the output current of the power feedback module according to the predetermined configuration parameters after receiving the start command sent by controller 102, so that the difference between the output voltage and the preset rated voltage is less than or equal to the preset voltage threshold, and the difference between the output current and the preset rated current is less than or equal to the preset current threshold.

[0055] The controller 102 is also used to determine the test results of the DC-DC converter 101 based on the output voltage and output current of the DC-DC converter 101, and to display the test results.

[0056] The controller 102 can be connected to the DC-DC converter 101 via an Ethernet port, an RS485 interface, or a CAN bus; this disclosure does not limit the connection method. The DC-DC converter 101 can be a hydrogen production converter.

[0057] For example, the start test command can be selected and triggered by the user through a GUI (Graphical User Interface) menu, or it can be triggered by a hardware switch, and this disclosure does not limit it in this way.

[0058] After receiving the user's start test command, the controller 102 can send a start command to the DC-DC converter 101. After receiving the start command sent by the controller 102, the DC-DC converter 101 obtains the predetermined configuration parameters. For example, the configuration parameters may include the preset rated voltage, preset rated current, preset voltage threshold, and preset current threshold of the electrical equipment (e.g., an electrolyzer using a hydrogen production converter), wherein the preset voltage threshold and preset current threshold represent the voltage and current fluctuations allowed by the electrical equipment.

[0059] For example, the DC-DC converter 101 can use a closed-loop controller to regulate the output voltage of the power harvesting module and the output current of the power feedback module. The closed-loop controller can be a proportional-integral (PI) controller or a sliding mode control (SMC). The predetermined configuration parameters can include closed-loop controller parameters, such as the default type of the closed-loop controller (e.g., whether it is a proportional-integral controller or a sliding mode controller) and the default parameters of the closed-loop controller (default closed-loop controller parameters, such as the proportional coefficient and integral coefficient of the proportional-integral controller).

[0060] After obtaining the predetermined configuration parameters, the output voltage of the power acquisition module and the output current of the power feedback module can be adjusted according to the configuration parameters so that the difference between the output voltage and the preset rated voltage is less than or equal to the preset voltage threshold, and the difference between the output current and the preset rated current is less than or equal to the preset current threshold.

[0061] For example, if the DC-DC converter 101 is a hydrogen production converter, the preset rated voltage can be DC200V, the preset rated current can be 100A, the preset voltage threshold and the preset current threshold can be 0. Considering that there is a certain error in the testing process, the preset voltage threshold can be 0.5V and the preset current threshold can be 0.1A.

[0062] Through the above-mentioned testing system, electrical energy can circulate within the DC-DC converter 101, reducing the requirements for testing sites and equipment facilities, thereby reducing testing costs and improving testing efficiency.

[0063] In some embodiments, the controller 102 is further configured to send a parameter configuration instruction to the DC-DC converter 101 before sending a start instruction to the DC-DC converter 101. The DC-DC converter 101 is further configured to determine the configuration parameters according to the parameter configuration instruction. The configuration parameters may include test condition parameters and test operating parameters.

[0064] The test condition parameters can include multiple different combinations of preset rated voltage and preset rated current, as well as the test time for each test case. The preset rated voltage and preset rated current of the DC-DC converter 101 can be set to obtain the test results of the DC-DC converter 101 under different combinations of preset rated voltage and preset rated current. There can be multiple combinations of preset rated voltage and preset rated current. For example, multiple combinations of preset rated voltage and preset rated current can be issued to obtain multiple corresponding test results of the DC-DC converter 101 in sequence.

[0065] For example, the DC-DC converter 101 can use a closed-loop controller to regulate the output voltage of the power harvesting module and the output current of the power feedback module. Specifically, the output voltage of the power harvesting module is regulated using a voltage closed-loop controller and a first current closed-loop controller, and the output current of the power feedback module is regulated using a second current closed-loop controller.

[0066] The test operating parameters may include the specific type of the closed-loop controller, a first adjustment parameter, and a second adjustment parameter. For example, if the voltage closed-loop controller is a proportional-integral (PI) controller, then the first adjustment parameter may include the proportional gain K of the voltage PI controller. pv and integral coefficient K iv If the first current closed-loop controller is a sliding mode controller, then the first adjustment parameter includes the sliding mode type of the first current closed-loop controller (e.g., integral sliding surface, linear sliding surface) and the approach rate parameter. If the second current closed-loop controller is a proportional-integral controller, then the second adjustment parameter may include the proportional coefficient K of the second current closed-loop proportional-integral controller. pi and integral coefficient K ii .

[0067] It should be noted that the types, first adjustment parameters, and second adjustment parameters of the voltage closed-loop controller, the first current closed-loop controller, and the second current closed-loop controller described above are examples and not limitations on the implementation. The types and parameters of the voltage closed-loop controller, the first current closed-loop controller, and the second current closed-loop controller involved in this disclosure can be set independently, and this disclosure does not impose any restrictions on them.

[0068] After the DC-DC converter 101 obtains the configuration parameters, it determines the configuration parameters according to the parameter configuration instructions and completes the corresponding tests.

[0069] The DC-DC converter test system 100 described above allows for flexible configuration parameter settings, enabling the DC-DC converter 101 to operate according to the configuration parameters issued by the controller 102. This allows for the completion of multiple test conditions (i.e., combinations of different preset rated voltages and preset rated currents) issued by the controller 102. The system can test the impact of different test parameters on the test results under different conditions, reducing the requirements for test sites and equipment facilities, thereby reducing test costs and improving test efficiency.

[0070] In another embodiment, the configuration parameters issued by the controller 102 may also include module configuration parameters, such as specific internal module information of the power acquisition module and the power feedback module, used to configure the internal module information of multiple power acquisition modules and power feedback modules. In this way, the controller 102 can control the traversal of all internal modules of the DC-DC converter 101 during testing, achieving the same test results as constructing electrical equipment (e.g., an electrolyzer using a hydrogen production converter), improving the completeness of the DC-DC converter 101 test and increasing test efficiency.

[0071] The power acquisition module may include a voltage closed-loop controller and a first current closed-loop controller. The DC-DC converter 101 is also used to adjust the output voltage according to the first adjustment parameter through the voltage closed-loop controller and the first current closed-loop controller.

[0072] The voltage closed-loop controller can be a proportional-integral (PI) controller or a sliding mode control (SMC). For example, when the voltage closed-loop controller is a PI controller, the first regulation parameter may include the proportional coefficient K of the PI controller. pv and integral coefficient K iv The first current closed-loop controller can be a proportional-integral controller or a sliding mode controller. For example, if the specific type of the first current closed-loop controller is a sliding mode controller, the first adjustment parameter may include the sliding mode type parameter and the approach rate parameter of the first current closed-loop controller.

[0073] After obtaining the configuration parameters, the DC-DC converter 101 can first obtain the current output voltage of the DC-DC converter 101, calculate the voltage difference between the preset rated voltage and the output voltage, and then the voltage closed-loop controller can determine a first adjustment amount based on the voltage difference, and control the difference between the output voltage and the preset rated voltage to be less than or equal to the preset voltage threshold based on the first adjustment amount, so that the output voltage approaches the preset rated voltage.

[0074] This explanation will take a voltage closed-loop controller as a proportional-integral controller as an example. Figure 2 This is a logic block diagram illustrating an electrical energy harvesting module according to an exemplary embodiment. For example... Figure 2 As shown, the voltage closed-loop controller can obtain the first regulation value through a proportional-integral controller, which can be expressed by the following formula.

[0075]

[0076] Where t is the current time, e(t) represents the error function between the preset rated voltage and the actual output voltage, and K p K is the proportional coefficient of the proportional-integral controller. i Let t be the integral coefficient of the proportional-integral controller, and u(t) be the output function of the proportional-integral controller.

[0077] like Figure 2 As shown, the first adjustment amount is current, and the first adjustment amount has a functional relationship with u(t), which is used to adjust the output voltage to approach the preset rated voltage by controlling the first adjustment amount.

[0078] After the voltage closed-loop controller obtains the first regulation amount, it obtains the target value of the total output current after passing through the first output limit. The function of the first output limit is to avoid the regulation amount obtained by the voltage proportional-integral controller being too large. For example, the amplitude of the first output limit can be greater than the preset rated current. For example, the first output limit can be 1.1 times the preset rated current.

[0079] Then, the DC-DC converter 101 divides the obtained total output current target value by the number of power modules to obtain the module output current target value. Next, it obtains the output current, which can be measured by the DC-DC converter 101. The difference between the module output current target value and the output current is then passed through the first current closed-loop controller to obtain the second adjustment amount.

[0080] For example, such as Figure 2 As shown, when the first current closed-loop controller is a proportional-integral controller, the control principle of the first current closed-loop controller is the same as that of the voltage closed-loop controller described above, and will not be repeated here.

[0081] like Figure 2 As shown, the second adjustment amount is the modulation pulse width value of PWM (Pulse Width Modulation). After obtaining the modulation pulse width value, it is applied to the internal switching control circuit of the power acquisition module to adjust the on and off time of the switching transistor, thereby controlling the output current to approach the target value of the module output current, and thus indirectly controlling the output voltage to approach the preset rated voltage. Specifically, the output voltage approaching the preset rated voltage can be determined by the difference between the output voltage and the preset rated voltage being less than or equal to the preset voltage threshold.

[0082] The configuration parameters may also include a second adjustment parameter. The power feedback module may include a second current closed-loop controller. The DC-DC converter 101 is further configured to adjust the output current according to the second adjustment parameter via the second current closed-loop controller. The second current closed-loop controller may be a proportional-integral controller or a sliding mode controller.

[0083] First, the DC-DC converter 101 can obtain the preset rated current and the output current. The output current can be obtained by measuring the DC-DC converter 101. The preset rated current of the module is obtained by dividing the preset rated current by the number of power feedback modules. The difference between the preset rated current and the output current is then used to obtain a third adjustment value through a second current closed-loop controller. The second current closed-loop controller is used to determine the third adjustment value based on the preset rated current of the module and the output current. By controlling the third adjustment value, the output current is controlled to approach the preset rated current of the module. Specifically, the output current can be determined to approach the preset rated current if the difference between the output current and the preset rated current is less than or equal to a preset current threshold.

[0084] Figure 3 This is a logic block diagram illustrating an electrical energy feedback module according to an exemplary embodiment. For example... Figure 3 As shown, after obtaining the preset rated current and output current of the module, the difference between the two is used to obtain a third adjustment value through a proportional-integral controller. This third adjustment value is the modulation pulse width value of PWM (Pulse Width Modulation). After obtaining this modulation pulse width value, it is applied to the switching control circuit inside the power feedback module to adjust the on-off time of the switching transistor, thereby controlling the output current to approach the preset rated current of the module, so that the sum of the output currents of multiple power feedback modules approaches the preset rated current. For the specific implementation scheme of the proportional-integral controller, please refer to formula (1) and related technologies regarding proportional-integral controller schemes, which will not be elaborated here.

[0085] In addition to the proportional-integral controller scheme given in the above example, the voltage closed-loop controller, the first current closed-loop controller, and the second current closed-loop controller can also be sliding mode controllers (SMCs). When constructing the sliding surface, a linear sliding surface or an integral sliding surface can be constructed based on the error function. When designing the approach rate, a constant-rate approach rate, an exponential approach rate, or a power approach rate can be used. This disclosure does not impose any restrictions on this. For specific implementation schemes, please refer to the technical solutions of sliding mode controllers in related technologies, which will not be elaborated here.

[0086] After the output voltage gradually approaches the preset rated voltage under the regulation of the voltage closed-loop controller and the first current closed-loop controller, and the output current gradually approaches the preset rated current under the regulation of the second current closed-loop controller, the controller 102 is further used to determine the test result of the DC-DC converter 101 based on the output voltage and output current of the DC-DC converter 101, and display the test result.

[0087] For example, the test results include, but are not limited to: average output voltage, average output current, output voltage ripple rate, output current ripple rate, power, and energy efficiency under test conditions. This disclosure does not limit these aspects.

[0088] Taking the output voltage ripple rate as an example, the output voltage ripple rate characterizes the degree to which the output voltage fluctuates around the preset rated voltage, and can be specifically expressed by the following formula.

[0089]

[0090] Among them, R u This indicates the output voltage ripple rate, where ΔU represents the peak ripple value, i.e., the difference between the maximum and minimum output voltage. ref This is the output voltage.

[0091] Figure 4 This is a block diagram illustrating another DC-DC converter test system 100 according to an exemplary embodiment, such as Figure 4 As shown, the DC-DC converter test system 100 also includes a power conversion device 103, which is connected to the controller 102 and the DC-DC converter 101 respectively.

[0092] The controller 102 is also configured to send a configuration command to the power conversion device before sending a start command to the DC-DC converter 101;

[0093] The power conversion device 103 is used to convert the grid power supply into a DC power supply that meets the preset voltage conditions according to the configuration instructions, and to use the DC power supply to power the DC-DC converter 101.

[0094] In current industrial applications, the mains power supply is typically 380V AC. For the DC-DC converter 101, a DC power input is generally required. Therefore, in some embodiments, the DC-DC converter 101 can also be directly connected to the mains power supply via the power conversion device 103. For example, the DC-DC converter 101 can be a hydrogen production converter, requiring a DC voltage of U. dc It can be connected to the mains power supply via power conversion device 103.

[0095] In some possible implementations, the power conversion device 103 can be a voltage regulator and a diode rectifier bridge. The voltage regulator is connected to the diode rectifier bridge, with its input connected to the mains power supply. The output of the diode rectifier bridge is connected to the DC-DC converter 101. The power conversion device 103 is connected to a controller 102 to receive configuration commands from the controller 102. The voltage regulator converts the input mains power supply into AC power that meets a first preset input voltage, and the diode rectifier bridge converts the AC power supply with the first preset input voltage into DC power that meets a second preset input voltage, providing input DC power to the DC-DC converter 101. For example, in the case of a hydrogen production converter, the second preset input voltage requirement is U. dc Therefore, the maximum voltage regulation output requirement of this voltage regulator should not be lower than... The output voltage requirement for this diode rectifier bridge is U. dc The output current requirement can be found in the following formula:

[0096]

[0097] Among them, U dc Here, P is the second preset input voltage of the DC-DC converter 101, and P is the rated power of the DC-DC converter 101. The rated power loss of the DC-DC converter 101 is, for example, 3%.

[0098] For details on the technical solutions for the voltage regulator and diode rectifier bridge, please refer to the descriptions in relevant technical documents; they will not be repeated here.

[0099] For example, before sending a start command to the DC-DC converter 101, the controller 102 may send a configuration command to the voltage regulator and the diode rectifier bridge. The configuration command may include the second preset input voltage for adjusting the second preset input voltage of the DC-DC converter 101. After receiving the configuration command, the controller converts the grid power supply to a DC power supply that meets the second preset input voltage according to the configuration command, and uses the DC power supply to power the DC-DC converter 101.

[0100] In this technical solution, the grid power is converted into the DC power required by the DC-DC converter 101 through a voltage regulator and a diode rectifier bridge. Moreover, during the test, the first preset input voltage can be adjusted by the voltage regulator, and then the second preset input voltage can be adjusted to test the test conditions of the DC-DC converter 101 under different second preset input voltages, thus expanding the test scenarios and further improving the test efficiency.

[0101] In another possible implementation, the power conversion device 103 can also be a pulse width modulation rectifier cabinet. The input terminal of the pulse width modulation rectifier cabinet is connected to the mains power supply, and the output terminal of the pulse width modulation rectifier cabinet is connected to the DC-DC converter 101, used to convert the mains power supply into DC power that meets the second preset input voltage. The DC voltage output by the pulse width modulation rectifier cabinet can also be adjusted according to configuration commands to test the test conditions of the DC-DC converter 101 under different second preset input voltages, expanding the test scenarios and further improving test efficiency.

[0102] In another possible implementation, the power conversion device 103 can also be a soft-start circuit and a diode rectifier bridge. The soft-start circuit is connected to the diode rectifier bridge, with its input connected to the mains power supply and the output connected to the DC-DC converter 101. The power conversion device 103 is connected to the controller 102 to receive configuration commands sent by the controller 102. The soft-start circuit prevents a large current surge from forming on the diode rectifier bridge at the moment the mains power is switched on, thereby protecting the normal operation of the diode rectifier bridge. There are various technical methods for the specific structure of the soft-start circuit; for example, it can be a relay K1 connected in series with a resistor R and then another relay K2 connected in parallel, or it can be a power thermistor circuit. This disclosure does not limit the specific implementation. The diode rectifier bridge is used to convert the grid power supply into a DC power supply that meets the second preset input voltage, providing input DC power to the DC-DC converter 101. The diode rectifier bridge can be connected to the controller 102. Before sending a start command to the DC-DC converter 101, the controller 102 can send a configuration command through the diode rectifier bridge. The configuration command can include the second preset input voltage and is used to adjust the second preset input voltage of the DC-DC converter 101. After receiving the configuration command, the grid power supply is converted into a DC power supply that meets the second preset input voltage according to the configuration command, and the DC power supply is used to power the DC-DC converter 101.

[0103] After the DC-DC converter test system 100 completes the test, residual voltage may remain on the DC-DC converter 101, which could easily cause a safety accident.

[0104] Figure 5 This is a block diagram illustrating yet another DC-DC converter test system 100 according to an exemplary embodiment, such as Figure 5 As shown, the DC-DC converter test system 100 also includes a discharge circuit 104, which is connected to the DC-DC converter 101.

[0105] The discharge circuit 104 is used to discharge the residual voltage of the DC-DC converter 101 when a test completion command triggered by the user is received, so as to ensure the safety of the test personnel.

[0106] In some possible implementations, after the test is completed, the user can manually control the discharge circuit to connect to the DC-DC converter 101 and discharge the residual voltage on the DC-DC converter 101 through the discharge circuit 104, thereby ensuring the safety of the test personnel and preventing safety accidents.

[0107] In another possible implementation, the discharge circuit 104 can also be connected to the controller 102. The discharge circuit 104 is connected to the DC-DC converter 101 through a relay K3 that is open by default. The controller 102 controls the corresponding relay K3. After the test is completed, the relay K3 is closed according to the test completion command triggered by the user, thereby controlling the discharge circuit 104 to connect to the DC-DC converter 101, discharging the residual voltage on the DC-DC converter 101, ensuring the safety of the test personnel and avoiding the occurrence of safety accidents.

[0108] In this technical solution, the residual voltage on the DC-DC converter 101 is discharged through the discharge circuit 104, ensuring the safety of the test personnel and allowing subsequent tests to continue. On the basis of ensuring personnel safety, the test efficiency is further improved.

[0109] Figure 6 This is a flowchart illustrating a DC-DC converter testing method according to an exemplary embodiment. The DC-DC converter is applied to a testing system for the DC-DC converter. The testing system includes the DC-DC converter and a controller connected to the DC-DC converter. The DC-DC converter includes multiple power harvesting modules and multiple power feedback modules. Figure 6 As shown, the method includes the following steps:

[0110] In step S601, if the controller receives a start test command triggered by the user, the controller receives the start command sent by the controller.

[0111] In step S602, after receiving the start command sent by the controller, the output voltage of the power acquisition module and the output current of the power feedback module are adjusted according to the predetermined configuration parameters, so that the difference between the output voltage and the preset rated voltage is less than or equal to the preset voltage threshold, and the difference between the output current and the preset rated current is less than or equal to the preset current threshold.

[0112] Regarding the methods in the above embodiments, the specific manner in which each step is performed has been described in detail in the embodiments of the system, and will not be elaborated here.

[0113] By using the above method, the circulation of electrical energy within the DC-DC converter can be controlled, reducing the requirements for test site and test equipment facilities, lowering test costs, and improving test efficiency.

[0114] Figure 7 This is a flowchart illustrating another DC-DC converter testing method according to an exemplary embodiment, such as... Figure 7 As shown, the test method includes:

[0115] In step S701, when the controller receives a start test command triggered by the user, it receives a parameter configuration command sent by the controller.

[0116] In step S702, the configuration parameters are determined according to the parameter configuration instructions.

[0117] In step S703, a start command sent by the controller is received.

[0118] In step S704, after receiving the start command sent by the controller, the output voltage of the power acquisition module and the output current of the power feedback module are adjusted according to the predetermined configuration parameters, so that the difference between the output voltage and the preset rated voltage is less than or equal to the preset voltage threshold, and the difference between the output current and the preset rated current is less than or equal to the preset current threshold.

[0119] Regarding the methods in the above embodiments, the specific manner in which each step is performed has been described in detail in the embodiments of the relevant system, and will not be elaborated here.

[0120] Through this technical solution, configuration parameters can be flexibly set to control the DC-DC converter to work according to the configuration parameters issued by the controller, and to complete multiple test conditions issued by the controller (i.e., different combinations of preset rated voltage and preset rated current). It can test the impact of different test parameters on the test results under different conditions, reduce the requirements for test site and test equipment facilities, reduce test costs, and improve test efficiency.

[0121] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of this disclosure. This application 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 examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the following claims.

[0122] 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 limited only by the appended claims.

[0123] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A DC-DC converter testing system, characterized in that, The test system includes a DC-DC converter and a controller, the controller being connected to the DC-DC converter, and the DC-DC converter including multiple power acquisition modules and multiple power feedback modules; The controller is configured to send a start command to the DC-DC converter upon receiving a start test command triggered by a user. The DC-DC converter is used to adjust the output voltage of the power acquisition module and the output current of the power feedback module according to the predetermined configuration parameters after receiving the start command sent by the controller, so that the difference between the output voltage and the preset rated voltage is less than or equal to the preset voltage threshold, and the difference between the output current and the preset rated current is less than or equal to the preset current threshold. The controller is also configured to determine the test results of the DC-DC converter based on the output voltage and output current of the DC-DC converter, and to display the test results.

2. The testing system according to claim 1, characterized in that, The test system also includes a power conversion device, which is connected to the controller and the DC-DC converter respectively. The controller is further configured to send a configuration command to the power conversion device before sending the start command to the DC-DC converter; The power conversion device is used to convert grid power into DC power that meets preset voltage conditions according to the configuration instructions, and to use the DC power to power the DC-DC converter.

3. The testing system according to claim 2, characterized in that, The power conversion device includes: Pulse width adjustable rectifier cabinet; or A voltage regulator and a diode rectifier bridge, wherein the voltage regulator is connected to the mains power supply and the diode rectifier bridge, respectively; or... A soft-start circuit and a diode rectifier bridge are provided, wherein the soft-start circuit is connected to the mains power supply and the diode rectifier bridge, respectively.

4. The testing system according to claim 1, characterized in that, The controller is further configured to send a parameter configuration command to the DC-DC converter before sending a start command to the DC-DC converter; The DC-DC converter is also used to determine the configuration parameters according to the parameter configuration instructions.

5. The testing system according to claim 1, characterized in that, The configuration parameters include a first adjustment parameter, and the power acquisition module includes a voltage closed-loop controller and a first current closed-loop controller. The DC-DC converter is further configured to adjust the output voltage according to the first adjustment parameter via the voltage closed-loop controller and the first current closed-loop controller.

6. The testing system according to claim 5, characterized in that, The configuration parameters also include a second adjustment parameter, and the power feedback module includes a second current closed-loop controller; The DC-DC converter is further configured to adjust the output current according to the second adjustment parameter via the second current closed-loop controller.

7. The testing system according to claim 6, characterized in that, The voltage closed-loop controller is a proportional-integral controller or a sliding mode controller, and both the first current closed-loop controller and the second current closed-loop controller are proportional-integral controllers or sliding mode controllers.

8. The testing system according to any one of claims 1-7, characterized in that, The test system also includes a discharge circuit, which is connected to the DC-DC converter; The discharge circuit is used to discharge the residual voltage of the DC-DC converter upon receiving a test completion command triggered by the user.

9. A test method for a DC-DC converter, characterized in that, A test system for a DC-DC converter, the test system including the DC-DC converter and a controller, the controller being connected to the DC-DC converter, the DC-DC converter including multiple power harvesting modules and multiple power feedback modules; the method includes: When the controller receives a start test command triggered by the user, the controller receives the start command sent by the controller. After receiving the start command sent by the controller, the output voltage of the power acquisition module and the output current of the power feedback module are adjusted according to the predetermined configuration parameters, so that the difference between the output voltage and the preset rated voltage is less than or equal to the preset voltage threshold, and the difference between the output current and the preset rated current is less than or equal to the preset current threshold.

10. The method according to claim 9, characterized in that, Before receiving the start command sent by the controller, the method further includes: Receive parameter configuration instructions sent by the controller; The configuration parameters are determined according to the parameter configuration instructions.

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