Multipath component power supply and fault diagnosis method thereof

Abstract

The invention provides a multipath component power supply and a fault diagnosis method thereof, and the circuit comprises a preprocessing module and an isolation voltage conversion module, and carries out the sampling of the voltage, current and temperature of a plurality of positions in the multipath component power supply, and obtains the information of the component power supply, so as to monitor the power supply in real time. At the working temperature, generating power supply conversion efficiency according to the voltage and the current of the input and output nodes of the isolation voltage conversion module, and determining whether the multi-path component power supply fails or not according to the power supply conversion efficiency and a preset power supply conversion efficiency database; and fault types and fault positions of the multi-path component power supply are diagnosed according to a plurality of voltages and currents in the component power supply information. The component power supply provided by the invention obtains the state information of different positions in the power supply in real time, generates the related power supply conversion efficiency according to the state information to determine whether the power supply has a fault or not, analyzes the fault type and fault cause of the power supply when the fault occurs, and improves the reliability of fault diagnosis of the component power supply.

Description

Technical Field

[0001] The present invention relates to the technical field of power supply, and in particular to a multi-channel component power supply and a fault diagnosis method thereof. Background Art

[0002] The multi-channel component power supply is responsible for supplying power to the entire system equipment. Its performance and quality directly affect the safety and reliability of the entire system equipment. Fault diagnosis, as an important aspect of maintaining a multi-channel component power supply, is of great significance to ensuring the safe and stable operation of the entire system.

[0003] As the complexity of power supply systems increases, fault diagnosis and protection mechanisms need to be more intelligent so that they can accurately identify and respond to various potential fault conditions. In related technologies, fault diagnosis methods are mainly based on empirical analysis or simple fault detection circuits to identify power supply faults and directly disconnect the corresponding control switches. These methods are not only inefficient and slow to respond, but also unable to locate specific fault information, and cannot achieve the refinement of real-time power supply monitoring data and the intelligence of fault prediction.

[0004] Therefore, how to provide a technical solution that can comprehensively monitor power supply failures is a technical problem that urgently needs to be solved. Summary of the invention

[0005] In view of the above-mentioned shortcomings of the prior art, the present invention provides a technical solution of a multi-channel component power supply fault diagnosis method to solve at least one of the above-mentioned technical problems.

[0006] In order to achieve the above-mentioned purpose and other related purposes, the technical solution provided by this application is as follows.

[0007] According to a first aspect of an embodiment of the present application, a method for diagnosing a fault of a multi-channel component power supply is provided, wherein the multi-channel component power supply includes a preprocessing module and an isolation voltage conversion module, and the method includes:

[0008] Sampling the voltage, current and temperature of multiple component power supplies to obtain component power supply information;

[0009] At the operating temperature, a power conversion efficiency is generated according to the input and output voltages and the input and output currents of the isolated voltage conversion module, and a fault condition of the multi-channel component power supply is determined according to the power conversion efficiency and a preset power conversion efficiency database, wherein the preset power conversion efficiency database includes a mapping relationship between different input and output voltages of the isolated voltage conversion module and corresponding input and output currents at different temperatures;

[0010] If the multi-channel component power supply fails, determining the fault information of the multi-channel component power supply according to the multiple voltages and currents in the component power supply information;

[0011] The fault information includes the fault type and the fault location.

[0012] In one embodiment of the present application, the fault condition of the multi-way component power supply is determined based on the power conversion efficiency and the preset power conversion efficiency database, including: if the power conversion efficiency matches the parameters of the preset power conversion efficiency database, it is determined that the multi-way component power supply is normal; if the power conversion efficiency does not match the parameters of the preset power conversion efficiency database, it is determined that the multi-way component power supply is faulty.

[0013] In one embodiment of the present application, if the multi-channel component power supply fails, the fault information of the multi-channel component power supply is determined based on multiple voltages and currents in the component power supply information, including: determining the fault state of the preprocessing module based on the voltage and current in the preprocessing module; if the input voltage of the preprocessing module is normal and its output current is zero, determining that the preprocessing module is an open circuit fault; if the input voltage and current of the preprocessing module are both normal, determining the fault information based on the input current and output voltage of the isolation voltage conversion module; if the input current waveform of the preprocessing module has an abnormal increase and its input voltage is within a preset voltage range, determining the fault information based on the input voltage of the preprocessing module.

[0014] In one embodiment of the present application, the isolated voltage conversion module includes a plurality of voltage conversion units arranged in parallel. If the input voltage and current of the preprocessing module are normal, the fault information is determined according to the input current and output voltage of the isolated voltage conversion module, including: if the input current of the voltage conversion unit is zero, it is determined that the corresponding voltage conversion unit is a primary open circuit fault; if the input current of the voltage conversion unit is normal and its output voltage is abnormal, it is determined that the corresponding voltage conversion unit is a secondary fault.

[0015] In one embodiment of the present application, if the input current waveform of the preprocessing module increases abnormally and its input voltage is within a preset voltage range, the fault information is determined according to the input voltage of the preprocessing module, including: when the input voltage of the preprocessing module is within the preset voltage range, determining that the preprocessing module has a short circuit fault or the voltage conversion unit has a primary short circuit fault; controlling each of the voltage conversion units to be in an independent working state, and obtaining the input voltage of the preprocessing module in this state; if the input voltages of the preprocessing modules are all within the preset voltage range, determining that the preprocessing module has a short circuit fault; if at least one of the voltage conversion units has a normal input voltage of the associated preprocessing module when working independently, determining that the voltage conversion unit whose input voltage of the preprocessing module is within the preset voltage range has a primary short circuit fault.

[0016] In one embodiment of the present application, after determining the fault information of the multi-channel component power supply according to multiple voltages and currents in the component power supply information, it also includes: generating a corresponding switch disconnection instruction according to the fault information, and shutting off the sub-control switch connected to the preprocessing module or the voltage conversion unit based on the switch disconnection instruction to protect the multi-channel component power supply, wherein the sub-control switch includes a main control switch that controls the preprocessing module and a sub-control switch that controls the voltage conversion unit.

[0017] According to a second aspect of an embodiment of the present application, a multi-channel component power supply is provided, comprising:

[0018] A pre-processing module, connected to a DC power supply, and performing surge suppression and filtering on the DC power supply;

[0019] An isolation voltage conversion module, comprising a plurality of voltage conversion units, wherein the voltage conversion unit performs a DC conversion process on the voltage output by the preprocessing module to obtain a load driving voltage to drive the load;

[0020] A switch module, comprising a master control switch and a plurality of sub-control switches, wherein the master control switch controls the working state of the pre-processing module, and the sub-control switches respectively control the working states of the plurality of voltage conversion units;

[0021] A parameter acquisition module performs voltage, current and temperature sampling on the preprocessing module and the isolation voltage conversion module to obtain component power supply information;

[0022] A fault diagnosis module, which generates a power conversion efficiency according to the input and output voltage and the input and output current of the isolated voltage conversion module at the operating temperature, and diagnoses the fault condition of the multi-channel component power supply based on the power conversion efficiency;

[0023] When the multi-channel component power supply fails, the fault diagnosis module determines the fault information of the multi-channel component power supply according to the multiple voltages and currents in the component power supply information;

[0024] The power supply fault information includes the fault type and the fault location.

[0025] In one embodiment of the present application, the fault diagnosis module compares the power conversion efficiency with the parameters of a preset power conversion efficiency database. If the fault diagnosis module determines that the power conversion efficiency is within the parameters of the preset power conversion efficiency database, it is determined that the multi-way component power supply is normal; otherwise, the fault diagnosis module determines that a fault occurs in the multi-way component power supply.

[0026] In one embodiment of the present application, when the multi-channel component power supply fails, the fault diagnosis module determines the fault information of the multi-channel component power supply based on multiple voltages and currents in the component power supply information, including: the fault module determines the fault condition of the preprocessing module based on the voltage and current of the preprocessing module; the fault diagnosis module determines that the input voltage of the preprocessing module is normal and its output current is zero, then determines that the preprocessing module is an open circuit fault; the fault diagnosis module determines that the preprocessing module is normal, then determines the fault information based on the input current and output voltage of the isolation voltage conversion module; the fault diagnosis module determines that the input voltage of the preprocessing module is abnormal, then determines the fault information based on the input voltage of the preprocessing module.

[0027] In one embodiment of the present application, after the fault diagnosis module determines the fault information of the multi-channel component power supply based on multiple voltages and currents in the component power supply information, it includes: the fault diagnosis module generates a switch disconnect instruction based on the fault information, and disconnects the main control switch or sub-control switch associated with the fault information in the switch module.

[0028] The present application provides a multi-channel component power supply and a fault diagnosis method thereof. The circuit includes a preprocessing module and an isolation voltage conversion module. The voltage, current and temperature at multiple positions in the multi-channel component power supply are sampled to obtain component power supply information to monitor the working information of the power supply in real time. At the working temperature, the power conversion efficiency is generated according to the voltage and current of the input and output nodes of the isolation voltage conversion module. Whether the multi-channel component power supply fails is determined according to the power conversion efficiency and a preset power conversion efficiency database. When the multi-channel component power supply fails, the fault type and fault location of the multi-channel component power supply are diagnosed according to the multiple voltages and currents in the component power supply information. The component power supply provided by the present application can obtain the status information of different positions in the power supply in real time, generate the relevant power conversion efficiency according to the status information, so as to determine whether the power supply has a fault. When a fault occurs, the fault type and fault cause of the power supply are analyzed to improve the reliability of component power supply fault diagnosis.

[0029] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present invention, and together with the specification, are used to explain the principles of the present invention. Obviously, the drawings described below are only some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0031] Figure 1 is a flow chart of a multi-channel component power supply fault diagnosis method shown in an exemplary embodiment of the present invention;

[0032] Figure 2 is a specific circuit structure of a multi-channel component power supply shown in an exemplary embodiment of the present invention;

[0033] Figure 3 FIG. 4 is a flow chart of fault diagnosis of a multi-channel component power supply shown in an exemplary embodiment of the present invention. DETAILED DESCRIPTION

[0034] The following will describe the embodiments of the present invention with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for illustrating the present invention, not for limiting the scope of protection of the present invention.

[0035] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and thus the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0036] In the following description, numerous details are discussed to provide a more thorough explanation of the embodiments of the present invention. However, it is obvious to those skilled in the art that the embodiments of the present invention can be implemented without these specific details. In other embodiments, well-known structures and devices are shown in the form of block diagrams rather than in detail to avoid making the embodiments of the present invention difficult to understand.

[0037] The multi-channel component power supply is responsible for supplying power to the entire system equipment. Its performance and quality directly affect the safety and reliability of the entire system equipment. Fault diagnosis, as an important aspect of maintaining a multi-channel component power supply, is of great significance to ensuring the safe and stable operation of the entire system.

[0038] As the complexity of power supply systems increases, fault diagnosis and protection mechanisms need to be more intelligent so that they can accurately identify and respond to various potential fault conditions. In related technologies, fault diagnosis methods are mainly based on empirical analysis or simple fault detection circuits to identify power supply faults and directly disconnect the corresponding control switches. These methods are not only inefficient and slow to respond, but also unable to locate specific fault information, nor can they achieve refinement of real-time power supply monitoring data and more intelligent fault prediction.

[0039] The core device inside a multi-channel component power supply is the power module. The efficiency index of the power module is affected by the power loss of the internal components. The device with the largest loss is the power device. Under the impact of factors such as abnormal voltage, current and temperature, the power device will degrade over time. The power device may degrade as a gradual process, which is manifested as a reduction or failure of performance and characteristics.

[0040] To solve the above problems, the present application provides a multi-channel component power supply fault diagnosis method, the multi-channel component power supply includes a pre-processing module and an isolation voltage conversion module, such as Figure 1 As shown, the method at least includes steps S110 to S130, including:

[0041] S110, sampling the voltage, current and temperature of multiple component power supplies to obtain component power supply information;

[0042] S120, generating power conversion efficiency according to the input and output voltages and the input and output currents of the isolated voltage conversion module at the operating temperature, and determining the fault conditions of the multi-channel component power supplies according to the power conversion efficiency and a preset power conversion efficiency database, wherein the preset power conversion efficiency database includes a mapping relationship between different input and output voltages of the isolated voltage conversion module and corresponding input and output currents at different temperatures;

[0043] S130: If a fault occurs in the multi-channel component power supply, the fault information of the multi-channel component power supply is determined according to the multiple voltages and currents in the component power supply information; wherein the fault information includes the fault type and the fault location.

[0044] like Figure 2 As shown, the multi-channel component power supply includes a preprocessing module, an isolation voltage conversion module, a switch module, a parameter acquisition module and a fault diagnosis module. The preprocessing module is connected to a DC power supply Vin_dc. The positive electrode of the DC power supply Vin_dc is connected to a surge suppression unit in the preprocessing module after passing through a master control switch S in the switch module. The control end of the master control switch S is connected to the fault diagnosis module. The surge suppression unit is used to suppress surges on the DC power supply Vin_dc. A capacitor Cin is connected in series between the output end of the surge suppression unit and the negative electrode of the DC power supply Vin_dc. The capacitor Cin is used to filter the voltage after surge suppression. A first current sensor IN1 in the parameter acquisition module is arranged between the master control switch S and the surge suppression unit. The first current sensor IN1 is used to collect the input current of the preprocessing module. A first voltage acquisition sensor Vm in the parameter acquisition module is arranged between the input end of the first current sensor IN1 and the negative electrode of the DC power supply Vindc to collect the bus voltage input by the preprocessing module. The first current sensor IN1 and the first voltage acquisition sensor Vm are connected to the fault diagnosis module.

[0045] like Figure 2 As shown, the output end of the preprocessing module is connected to the input end of the isolation voltage conversion module, and multiple voltage conversion units are arranged in parallel in the isolation voltage conversion module. A second current sensor IN2i, a sub-controlled switch Si, an i-th voltage conversion unit and a third current sensor IN3i are arranged on the branch including the voltage conversion unit. The output end of the preprocessing module is connected to the load unit via the second current sensor IN2i, the sub-controlled switch Si, the i-th voltage conversion unit and the third current sensor IN3i. The second voltage sensor Vni is arranged between the output end of the third current sensor IN3i and the input end of the load unit. The load unit includes a capacitor Ci and a resistor Ri, and the capacitor Ci is connected in parallel with the resistor Ri. The second current sensor IN2i is used to collect the current at the input end of the i-th voltage conversion unit; the sub-control switch Si is used to control the working state of the i-th voltage conversion unit, that is, when the sub-control switch Si is disconnected, the i-th voltage conversion unit is in an idle state, and when the sub-control switch Si is closed, the i-th voltage conversion unit is in a working state; the third current sensor IN3i is used to collect the current at the output end of the i-th voltage conversion unit, and the second voltage sensor Vni is used to collect the voltage at the output end of the i-th voltage conversion unit. Wherein, i is a positive integer, 1≤i≤N, and N is the number of voltage conversion units in the isolated voltage conversion module.

[0046] It should be noted that the parameter acquisition module includes a first current sensor IN1, a first voltage acquisition sensor Vm, a second current sensor IN2i, a third current sensor IN3i, and a second voltage sensor Vni. The switch module includes a master control switch S and a sub-control switch Si.

[0047] like Figure 2 As shown, the fault diagnosis module can also be connected to the whole machine through the communication bus to report the health status of the multi-channel component power supply to the whole machine. The fault diagnosis module is connected to the parameter acquisition module and the switch module. The fault diagnosis module receives the circuit data collected by the parameter acquisition module and controls the working status of the master control switch S and the sub-control switch Si in the switch module according to the fault condition of the multi-channel component power supply.

[0048] On the basis of diagnosing the voltage and current of the power module, it is also necessary to add the efficiency diagnosis. The efficiency parameter can characterize the health status of the power supply. If some devices work with defects, the loss will increase, which will cause the efficiency to decrease. Therefore, the introduction of efficiency diagnosis can further reflect the health status of the power module. The efficiency of the power supply is related to the operating temperature. It is necessary to determine the efficiency data of the device at the operating temperature to give early warning to the power supply working with defects before the failure occurs.

[0049] Specifically, the voltage, current and temperature of the preprocessing module and the isolation voltage conversion module in the multi-channel component power supply are sampled to obtain the component power supply information; the component power supply information includes the input and output voltage and current of each preprocessing module and the input and output voltage and current of the isolation voltage conversion module. At the working temperature, the power conversion efficiency is calculated according to the input and output voltage of the isolation voltage conversion module and the input and output current of the isolation voltage conversion module; at different temperatures, a preset power conversion efficiency database is established according to the mapping relationship between different input and output voltages and corresponding input and output currents in the isolation voltage conversion module, and it is judged whether the multi-channel component power supply fails through the power conversion efficiency and the preset power conversion efficiency database. When the multi-channel component power supply fails, the fault location and fault type of the multi-channel component power supply are determined according to the input and output voltages and input and output currents in the component power supply information.

[0050] In detail, the fault condition of the multi-channel component power supply is determined according to the power conversion efficiency and the preset power conversion efficiency database, including: if the power conversion efficiency matches the parameters of the preset power conversion efficiency database, it is determined that the multi-channel component power supply is normal; if the power conversion efficiency does not match the parameters of the preset power conversion efficiency database, it is determined that the multi-channel component power supply has failed. Specifically, the power conversion efficiency is compared with the parameters in the preset power conversion efficiency database, and the parameters in the preset power conversion efficiency database include normal parameters and warning parameters. If the power conversion efficiency matches the normal parameters or warning parameters in the preset power conversion efficiency database, it is determined that the multi-channel component power supply is normal, wherein when the power conversion efficiency matches the warning parameters, the fault trend of the multi-channel component power supply can be predicted, and the warning of the power failure can be realized in advance, so that the staff can perform maintenance in time and reduce the failure rate of the power supply; if the power conversion efficiency does not match both the normal parameters and the warning parameters in the preset power conversion efficiency database, it is determined that the multi-channel component power supply has failed.

[0051] In detail, if a multi-channel component power supply fails, the fault information of the multi-channel component power supply is determined based on multiple voltages and currents in the component power supply information, including: determining the fault state of the preprocessing module based on the voltage and current in the preprocessing module; if the input voltage of the preprocessing module is normal and its output current is zero, determining that the preprocessing module is an open circuit fault; if the input voltage and current of the preprocessing module are both normal, determining the fault information based on the input current and output voltage of the isolation voltage conversion module; if the input current waveform of the preprocessing module has an abnormal increase and its input voltage is within a preset voltage range, determining the fault information based on the input voltage of the preprocessing module. Specifically, if the bus voltage of the first voltage acquisition sensor Vm is normal and the output current of the preprocessing module is zero, that is, the output current of the preprocessing module is determined to be zero based on the input current of the isolation voltage conversion module, and the input currents of multiple voltage conversion units in the isolation voltage conversion module are added to obtain the output current of the preprocessing module, then it is determined that the preprocessing module is an open circuit fault; if the input voltage and current of the preprocessing module are normal, the fault type and fault location are determined based on the input current and output voltage of the isolation voltage conversion module; if the input current of the preprocessing module increases abnormally and the input voltage of the preprocessing module is within the preset voltage range, the preset voltage range is smaller than the normal input voltage range of the preprocessing module, the size of the lowered input voltage of the preprocessing module is related to the input characteristics of the power supply instrument and the size of the short-circuit resistance (so the preset voltage range is only written as an example, and the range is not clear), for example, the normal range of the input voltage is 16V~40V, and the preset voltage range is 1V~5V, so as to determine the fault type and fault location according to the input voltage of the preprocessing module.

[0052] In detail, the isolated voltage conversion module includes a plurality of voltage conversion units arranged in parallel. If the input voltage and current of the preprocessing module are normal, the fault information is determined according to the input current and output voltage of the isolated voltage conversion module, including: if the input current of the voltage conversion unit is zero, the corresponding voltage conversion unit is determined to be a primary open circuit fault; if the input current of the voltage conversion unit is normal and its output voltage is abnormal, the corresponding voltage conversion unit is determined to be a secondary fault. Specifically, if the input current of a certain voltage conversion unit is zero, the voltage conversion unit is determined to be a primary open circuit fault, that is, the input end of the voltage conversion unit is faulty; if the input current of a certain voltage conversion unit is normal but the output voltage of the voltage conversion unit is abnormal, the corresponding isolated voltage conversion module is determined to be a secondary fault, that is, the output end of the voltage conversion unit is faulty.

[0053] In detail, if the input current waveform of the preprocessing module increases abnormally and its input voltage is within a preset voltage range, fault information is determined based on the input voltage of the preprocessing module, including: when the input voltage of the preprocessing module is within the preset voltage range, determining that the preprocessing module has a short circuit fault or the voltage conversion unit has a primary short circuit fault; controlling each voltage conversion unit to be in an independent working state, and obtaining the input voltage of the preprocessing module in this state; if the input voltages of the preprocessing modules are all within the preset voltage range, determining that the preprocessing module has a short circuit fault; if there is at least one voltage conversion unit whose associated preprocessing module input voltage is normal when working independently, determining that the voltage conversion unit whose input voltage of the preprocessing module is within the preset voltage range has a primary short circuit fault. Specifically, when the bus voltage input by the preprocessing module is within a preset voltage range, it is determined that a short circuit fault exists in the preprocessing module or the voltage conversion unit, and the voltage at the input end of the preprocessing module is pulled down; a plurality of sub-control switches (S1, S2~SN) are controlled to be closed separately so that each voltage conversion unit works independently, and the input voltage of the associated preprocessing module is collected when each voltage conversion unit works independently, that is, the bus voltage when each voltage conversion unit works independently; if the bus voltages of all voltage conversion units when working are within the preset voltage range, it is determined that the preprocessing module has a short circuit fault; if at least one voltage conversion unit has a normal bus voltage when working, it is judged that the voltage conversion unit whose bus voltage is pulled down has a primary short circuit fault.

[0054] Exemplarily, if the bus voltage at the input end of the preprocessing module is within a preset voltage range, it is determined that there is a primary short circuit fault in the multiple voltage conversion units or a short circuit fault in the preprocessing module, the sub-control switch S1 is controlled to be closed and the sub-control switches (S2~SN) are opened, and the bus voltage of the first voltage conversion unit when it works independently is collected. Similarly, other voltage conversion units are controlled to work independently to obtain the bus voltage when multiple voltage conversion units are working. If the bus voltages of all voltage conversion units are within the preset voltage range, it is determined that the preprocessing module has a short circuit fault. If the bus voltage is normal when a certain voltage conversion unit is working, it is determined that the preprocessing module is normal, thereby determining that the voltage conversion unit whose bus voltage is within the preset voltage range has a primary short circuit fault.

[0055] In detail, after determining the fault information of the multi-channel component power supply according to the multiple voltages and currents in the component power supply information, it also includes: generating a corresponding switch disconnection instruction according to the fault information, and shutting down the sub-control switch connected to the preprocessing module or the voltage conversion unit based on the switch disconnection instruction to protect the multi-channel component power supply, wherein the sub-control switch includes a master control switch that controls the preprocessing module and a sub-control switch that controls the voltage conversion unit. Specifically, after determining the fault information of the multi-channel component power supply, the fault location of the power supply has been determined, and a corresponding switch disconnection instruction is generated according to the fault location in the fault information, and the switch disconnection instruction is sent to the master control switch S or the sub-control switch (S1~SN) that generates the fault information. For example, if the preprocessing module fails, the master control switch S is disconnected; if the i-th voltage conversion unit fails, the sub-control switch Si is disconnected to protect the multi-channel component power supply.

[0056] In addition, multiple temperature sensors can be set to monitor the temperature of multiple voltage conversion units in the preprocessing module and the isolation voltage conversion module. The fault diagnosis module receives the temperature collected by the temperature sensor and compares the collected temperature with the corresponding preset temperature threshold range. According to the comparison result, it is determined whether the temperature of the multi-channel component power supply is abnormal. If the temperature of a node of the multi-channel component power supply is abnormal, the corresponding main control switch S or sub-control switch Si is disconnected to avoid damage to the multi-channel component power supply due to excessive temperature.

[0057] like Figure 3As shown, the fault diagnosis process of the multi-channel component power supply is as follows: if the output voltage of a certain voltage conversion unit is abnormal, the power conversion efficiency of the voltage conversion unit does not match the parameters in the preset power conversion efficiency database, and it is determined that the multi-channel component power supply has a fault, and the input voltage of the preprocessing module is diagnosed. When the input voltage of the preprocessing module is normal, it is diagnosed whether there is current at the output end of the preprocessing module. If there is no current at the output end of the preprocessing module, it is determined that the preprocessing module is an open circuit fault, and the main control switch S is disconnected; if the input voltage of the preprocessing module is pulled down, each voltage conversion unit is controlled by controlling the sub-control switches (S1~SN) to work independently, and when working independently, it is diagnosed whether the input voltage of the preprocessing module has returned to normal. When a certain voltage conversion unit works independently, the input voltage of the corresponding preprocessing module has returned to normal. If the bus voltage does not return to normal, it is determined that the preprocessing module is normal, and the voltage conversion unit whose bus voltage is pulled down has a primary short-circuit fault, and the corresponding sub-control switch Si is disconnected; if the bus voltage does not return to normal, it is determined that a short-circuit fault occurs in the preprocessing module, and the main control switch S is disconnected; if the input voltage of the preprocessing module does not decrease, the input voltage of the preprocessing module increases, the input voltage of the component power supply increases abnormally, the DC power supply Vin_dc has an abnormal fault, and the main control switch S is disconnected; the output current of the preprocessing module is normal, and the input current of the i-th voltage conversion unit is diagnosed. If the input current of the i-th voltage conversion unit is zero, it is determined that the voltage conversion unit has a primary open-circuit fault, and the corresponding sub-control switch Si is disconnected; the input current of the i-th voltage conversion unit is normal, and the voltage conversion unit is diagnosed as a secondary fault, and the corresponding sub-control switch Si is disconnected.

[0058] like Figure 2 As shown, the present application also provides a multi-channel component power supply, including:

[0059] The pre-processing module is connected to the DC power supply and performs surge suppression and filtering on the DC power supply;

[0060] An isolation voltage conversion module, which includes a plurality of voltage conversion units, and the voltage conversion unit performs a DC conversion process on the voltage output by the preprocessing module to obtain a load driving voltage to drive the load;

[0061] A switch module, comprising a master control switch and a plurality of sub-control switches, wherein the master control switch controls the working state of the preprocessing module, and the sub-control switches respectively control the working states of the plurality of voltage conversion units;

[0062] The parameter acquisition module samples the voltage, current and temperature of the preprocessing module and the isolation voltage conversion module to obtain the component power supply information;

[0063] A fault diagnosis module generates a power conversion efficiency according to the input and output voltage and the input and output current in the isolated voltage conversion module at the operating temperature, and diagnoses the fault conditions of the multi-channel component power supply based on the power conversion efficiency;

[0064] When a multi-channel component power supply fails, the fault diagnosis module determines the fault information of the multi-channel component power supply according to the multiple voltages and currents in the component power supply information;

[0065] The power supply fault information includes the fault type and the fault location.

[0066] Specifically, the multi-channel component power supply can directly collect the internal voltage and current, and calculate the corresponding power conversion efficiency according to the input voltage and output current of the isolation voltage conversion module, so as to determine whether the multi-channel component power supply is faulty according to the power conversion efficiency, and determine the fault type and fault location according to the voltage and current of the component power supply information, so as to provide reference information for the staff during maintenance.

[0067] In detail, the fault diagnosis module diagnoses the fault conditions of the multi-way component power supplies based on the power conversion efficiency, including: the fault diagnosis module compares the power conversion efficiency with the normal parameters and warning parameters in the preset power conversion efficiency database, the normal parameters and warning parameters can be determined according to the operating status of the multi-way component power supplies, and the fault diagnosis module determines that the power conversion efficiency is the normal parameters or warning parameters in the preset power conversion efficiency database, and determines that the multi-way component power supply is normal; the fault diagnosis module determines that the power conversion efficiency is not the normal parameters and warning parameters in the preset power conversion efficiency database, and determines that the multi-way component power supply has a fault.

[0068] In more detail, when a multi-channel component power supply fails, the fault diagnosis module determines the fault information of the multi-channel component power supply based on multiple voltages and currents in the component power supply information, including: the fault diagnosis module diagnoses whether there is a fault in the preprocessing module based on the input voltage (bus voltage), output voltage, input current and output current of the preprocessing module; when the fault diagnosis module diagnoses that the input voltage of the preprocessing module is normal but the output current of the preprocessing module is zero, it determines that the preprocessing module is an open circuit fault; when the fault diagnosis module determines that the input and output currents of the preprocessing module are normal, the fault diagnosis module determines the fault type and fault location of the multi-channel component power supply based on the input current and output voltage of the isolation voltage conversion module; when the fault diagnosis module determines that the input voltage of the preprocessing module is abnormal, the fault type and fault location of the multi-channel component power supply are determined based on the input voltage of the preprocessing module.

[0069] In more detail, after the fault diagnosis module determines the fault information of the multi-channel component power supply according to the multiple voltages and currents in the component power supply information, it includes: the fault diagnosis module locates the corresponding main control switch S or sub-control switch (S1~SN) according to the fault position, and generates a switch disconnection instruction, the fault diagnosis module sends the switch disconnection instruction to the main control switch S or sub-control switch (S1~SN) that generates the fault information. For example, if the preprocessing module fails, the switch disconnection instruction is sent to the main control switch S to disconnect the main control switch S; if the i-th voltage conversion unit fails, the switch disconnection instruction is sent to the sub-control switch Si to disconnect the sub-control switch Si to protect the multi-channel component power supply.

[0070] The present application provides a multi-channel component power supply and a fault diagnosis method thereof. The circuit includes a preprocessing module and an isolation voltage conversion module, and samples the voltage, current and temperature of multiple positions in the multi-channel component power supply to obtain component power supply information, so as to monitor the working information of the power supply in real time, and report the monitored information to the whole machine through a communication bus; at the working temperature, the power conversion efficiency is generated according to the voltage and current of the input and output nodes of the isolation voltage conversion module, and the multi-channel component power supply is determined according to the power conversion efficiency and the preset power conversion efficiency database to determine whether there is a trend of failure or whether the failure occurs, and the power supply failure is monitored early. When the multi-channel component power supply fails, the fault type and fault location of the multi-channel component power supply are diagnosed according to the multiple voltages and currents in the component power supply information, and the specific fault cause is quickly diagnosed according to the fault information, so as to provide the reliability of power supply fault diagnosis. The component power supply provided by the present application obtains the status information of different positions in the power supply in real time, generates the relevant power conversion efficiency according to the status information, so as to determine the status and trend of the power supply, and analyzes the fault type and fault cause of the power supply when a fault occurs, so as to improve the accuracy of component power supply fault diagnosis and facilitate subsequent maintenance inspection.

[0071] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by a person of ordinary skill in the art without departing from the spirit and technical ideas disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A method for diagnosing a multi-channel component power supply fault, characterized in that: The multi-channel component power supply includes a pre-processing module and an isolation voltage conversion module, and the method includes: Sampling the voltage, current and temperature of multiple component power supplies to obtain component power supply information; At the operating temperature, a power conversion efficiency is generated according to the input and output voltages and the input and output currents of the isolated voltage conversion module, and a fault condition of the multi-channel component power supply is determined according to the power conversion efficiency and a preset power conversion efficiency database, wherein the preset power conversion efficiency database includes a mapping relationship between different input and output voltages of the isolated voltage conversion module and corresponding input and output currents at different temperatures; If the multi-channel component power supply fails, determining the fault information of the multi-channel component power supply according to the multiple voltages and currents in the component power supply information; The fault information includes the fault type and the fault location.

2. The multi-channel component power supply fault diagnosis method according to claim 1, characterized in that: Determining the fault condition of the multi-path component power supply according to the power conversion efficiency and a preset power conversion efficiency database includes: If the power conversion efficiency matches the parameters of the preset power conversion efficiency database, it is determined that the power supply of the multi-channel component is normal; If the power conversion efficiency does not match the parameters of the preset power conversion efficiency database, it is determined that the multi-channel component power supply fails.

3. The multi-channel component power supply fault diagnosis method according to claim 1, characterized in that: If the multi-channel component power supply fails, the fault information of the multi-channel component power supply is determined according to the multiple voltages and currents in the component power supply information, including: Determining a fault state of the preprocessing module according to the voltage and current in the preprocessing module; If the input voltage of the preprocessing module is normal and the output current thereof is zero, it is determined that the preprocessing module is an open circuit fault; If the input voltage and current of the preprocessing module are both normal, determining the fault information according to the input current and output voltage of the isolation voltage conversion module; If the input current waveform of the preprocessing module increases abnormally and its input voltage is within a preset voltage range, the fault information is determined according to the input voltage of the preprocessing module.

4. The method for diagnosing a multi-channel component power supply fault according to claim 3, characterized in that: The isolated voltage conversion module includes a plurality of voltage conversion units arranged in parallel. If the input voltage and current of the preprocessing module are normal, the fault information is determined according to the input current and output voltage of the isolated voltage conversion module, including: If the input current of the voltage conversion unit is zero, it is determined that the corresponding voltage conversion unit is a primary open circuit fault; If the input current of the voltage conversion unit is normal and the output voltage thereof is abnormal, it is determined that the corresponding voltage conversion unit is a secondary fault.

5. The method for diagnosing a multi-channel component power supply fault according to claim 4, characterized in that: If the input current waveform of the preprocessing module increases abnormally and its input voltage is within a preset voltage range, the fault information is determined according to the input voltage of the preprocessing module, including: When the input voltage of the preprocessing module is within the preset voltage range, determining that the preprocessing module has a short circuit fault or the voltage conversion unit has a primary short circuit fault; Controlling each of the voltage conversion units to be in an independent working state, and obtaining the input voltage of the preprocessing module in this state; If the input voltage of the preprocessing module is within the preset voltage range, it is determined that the preprocessing module is short-circuited; If at least one of the voltage conversion units has a normal input voltage to the associated preprocessing module when working independently, the voltage conversion unit whose input voltage to the preprocessing module is within the preset voltage range is determined to have a primary short circuit fault.

6. The method for diagnosing a multi-channel component power supply fault according to claim 5, characterized in that: After determining the fault information of the multi-channel component power supply according to the multiple voltages and currents in the component power supply information, the method further includes: A corresponding switch disconnection instruction is generated according to the fault information, and a sub-control switch connected to the preprocessing module or the voltage conversion unit is turned off based on the switch disconnection instruction to protect the multi-channel component power supply, wherein the sub-control switch includes a main control switch that controls the preprocessing module and a sub-control switch that controls the voltage conversion unit.

7. A multi-channel component power supply, characterized in that: include: A pre-processing module, connected to a DC power supply, and performing surge suppression and filtering on the DC power supply; An isolation voltage conversion module, comprising a plurality of voltage conversion units, wherein the voltage conversion unit performs a DC conversion process on the voltage output by the preprocessing module to obtain a load driving voltage to drive the load; A switch module, comprising a master control switch and a plurality of sub-control switches, wherein the master control switch controls the working state of the pre-processing module, and the sub-control switches respectively control the working states of the plurality of voltage conversion units; A parameter acquisition module performs voltage, current and temperature sampling on the preprocessing module and the isolation voltage conversion module to obtain component power supply information; A fault diagnosis module, which generates a power conversion efficiency according to the input and output voltage and the input and output current of the isolated voltage conversion module at the operating temperature, and diagnoses the fault condition of the multi-channel component power supply based on the power conversion efficiency; When the multi-channel component power supply fails, the fault diagnosis module determines the fault information of the multi-channel component power supply according to the multiple voltages and currents in the component power supply information; The power supply fault information includes the fault type and the fault location.

8. The multi-channel component power supply according to claim 7, characterized in that: The fault diagnosis module diagnoses a fault condition of a multi-channel component power supply based on the power conversion efficiency, including: The fault diagnosis module compares the power conversion efficiency with the parameters of the preset power conversion efficiency database. If the fault diagnosis module determines that the power conversion efficiency is within the parameters of the preset power conversion efficiency database, it determines that the multi-way component power supply is normal; otherwise, the fault diagnosis module determines that the multi-way component power supply is faulty.

9. The multi-channel component power supply according to claim 7, characterized in that: When the multi-channel component power supply fails, the fault diagnosis module determines the fault information of the multi-channel component power supply according to the multiple voltages and currents in the component power supply information, including: The fault module determines the fault condition of the pre-processing module according to the voltage and current of the pre-processing module; The fault diagnosis module determines that the input voltage of the preprocessing module is normal and the output current thereof is zero, and then determines that the preprocessing module is an open circuit fault; If the fault diagnosis module determines that the pre-processing module is normal, the fault information is determined according to the input current and output voltage of the isolation voltage conversion module; The fault diagnosis module determines that the input voltage of the preprocessing module is abnormal, and then determines the fault information according to the input voltage of the preprocessing module.

10. The multi-channel component power supply according to claim 9, characterized in that: After the fault diagnosis module determines the fault information of the multi-channel component power supply according to the multiple voltages and currents in the component power supply information, the method includes: The fault diagnosis module generates a switch disconnection instruction according to the fault information, and disconnects the main control switch or the sub-control switch associated with the fault information in the switch module.

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