Power module power-up self-diagnosis method, control terminal and ups

Abstract

The application provides a power module power-on self-diagnosis method, a control terminal and a UPS. The power module comprises a rectifier module, a positive DC bus, a negative DC bus and an inverter. The method comprises: closing a driving signal of the inverter; opening a driving signal of the rectifier module, and determining whether the rectifier module is abnormal according to a DC bus voltage; wherein opening the driving signal of the rectifier module comprises opening a driving signal of part of elements in the rectifier module; if the rectifier module is normal, the driving signal of the rectifier module is closed, the driving signal of the inverter is opened, and whether the inverter is abnormal is determined. The application firstly judges the rectifier module abnormality through the DC bus voltage, and then judges the inverter abnormality, so that the hardware self-checking of the power module can be realized, and the failure can be avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the UPS technical field, and particularly relates to a power module power-on self-diagnosis method, a control terminal and a UPS. BACKGROUND

[0002] For banks, schools, financial institutions and the like, data centers are usually provided for accommodating servers, in order to maintain continuous power service, the data center is usually configured with a UPS, which provides short-term power in the case of power interruption, and prevents power interruption.

[0003] In the prior art, the UPS lacks power-on self-checking of the hardware circuit, which is easy to cause the UPS to be started with a disease, thereby causing the further expansion of the UPS failure, and even causing damage to the UPS. SUMMARY

[0004] Embodiments of the present application provide a power module power-on self-diagnosis method, a control terminal and a UPS, to solve the problem of lack of hardware power-on self-checking in the prior art.

[0005] In a first aspect, the embodiments of the present application provide a power module power-on self-diagnosis method, the power module comprising: a rectifier module, a positive direct current bus, a negative direct current bus and an inverter; the input end of the rectifier module is used to be connected with an alternating current power supply, the positive output end of the rectifier module is connected with the positive input end of the inverter through the positive direct current bus, the negative output end of the rectifier module is connected with the negative input end of the inverter through the negative direct current bus, and the output end of the inverter outputs alternating current; the power-on self-diagnosis method comprises:

[0006] turning off the driving signal of the inverter;

[0007] turning on the driving signal of the rectifier module, and determining whether the rectifier module is abnormal according to the direct current bus voltage; wherein turning on the driving signal of the rectifier module comprises turning on the driving signal of part of elements in the rectifier module;

[0008] if the rectifier module is normal, turning off the driving signal of the rectifier module, turning on the driving signal of the inverter, and determining whether the inverter is abnormal;

[0009] The direct current bus voltage is the voltage difference between the positive direct current bus and the negative direct current bus.

[0010] In a second aspect, the embodiments of the present application provide a control terminal, comprising a processor and a memory, the memory is used to store a computer program, the processor is used to call and run the computer program stored in the memory, and execute the power module power-on self-diagnosis method provided in the first aspect of the present application.

[0011] In a third aspect, the embodiment of the present application provides a UPS, comprising a power module and the control terminal according to the second aspect of the embodiment of the present application.

[0012] The power module is controlled by the control terminal.

[0013] The embodiment of the present application provides a power module, a control terminal and a UPS. The power module comprises a rectifier module, a positive direct current bus, a negative direct current bus and an inverter. The method comprises the following steps: closing a driving signal of the inverter; opening a driving signal of the rectifier module, and determining whether the rectifier module is abnormal according to a direct current bus voltage; wherein the step of opening the driving signal of the rectifier module comprises the step of opening a driving signal of part of elements in the rectifier module; if the rectifier module is normal, the driving signal of the rectifier module is closed, the driving signal of the inverter is opened, and it is determined whether the inverter is abnormal. In the embodiment of the present application, the driving of the inverter is closed first, the rectifier module is controlled to boost the direct current bus, the rectifier module is determined to be abnormal through the direct current bus voltage, the driving of the rectifier module is closed, the inverter inverts the direct current bus voltage, and it is determined whether the inverter is abnormal. Thus, the hardware self-check of the power module can be realized, and faults can be avoided. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0015] Figure 1 is a circuit structure schematic diagram of a power module provided by the embodiment of the present application;

[0016] Figure 2 is an implementation flowchart of a power module power-on self-diagnosis method provided by the embodiment of the present application;

[0017] Figure 3 is a circuit structure schematic diagram of a rectifier module provided by the embodiment of the present application;

[0018] Figure 4 is a circuit principle diagram of a rectifier module provided by the embodiment of the present application;

[0019] Figure 5 is a structure schematic diagram of a power module power-on self-diagnosis device provided by the embodiment of the present application;

[0020] Figure 6 is a schematic diagram of a control terminal provided by the embodiment of the present application. DETAILED DESCRIPTION

[0021] In the following description, for purposes of explanation and not limitation, specific details are set forth such as particular architectures, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. However, it will be apparent to those skilled in the art that the present application can be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known methods, devices, and circuits are omitted so as not to obscure the description of the present application with unnecessary detail.

[0022] In order to make the objects, technical solutions and advantages of the present application clearer, the following will be described in conjunction with specific embodiments and accompanying drawings.

[0023] Referring to Figure 1 , which shows a power module, comprising: a rectifier module 11, a positive DC bus BUS+, a negative DC bus BUS- and an inverter 12; the input end of the rectifier module 11 is used for connecting with an AC power supply, the positive output end of the rectifier module 11 is connected with the positive input end of the inverter 12 through the positive DC bus BUS+, the negative output end of the rectifier module 11 is connected with the negative input end of the inverter 12 through the negative DC bus BUS-, and the output end of the inverter 12 outputs AC power. Based on the above power module, the present application provides a power module power-on self-diagnosis method, referring to Figure 2 , which shows an implementation flowchart of the power module power-on self-diagnosis method provided by the present application, which is described in detail as follows:

[0024] S101: turn off the driving signal of the inverter 12;

[0025] S102: turn on the driving signal of the rectifier module 11, and determine whether the rectifier module 11 is abnormal according to the DC bus voltage; wherein, turning on the driving signal of the rectifier module 11 comprises turning on the driving signal of part of the elements in the rectifier module 11;

[0026] S103: if the rectifier module 11 is normal, turn off the driving signal of the rectifier module 11, turn on the driving signal of the inverter 12, and determine whether the inverter 12 is abnormal;

[0027] Wherein, the DC bus voltage is the voltage difference between the positive DC bus BUS+ and the negative DC bus BUS-.

[0028] In this embodiment of the invention, the inverter 12 is first turned off to eliminate its influence on the DC bus voltage. The drive signal of the rectifier module 11 is then turned on to charge the positive DC bus BUS+ and the negative DC bus BUS-. If the rectifier module 11 malfunctions, it will cause an abnormality in the DC bus voltage. Therefore, this embodiment of the invention determines whether the rectifier module 11 is malfunctioning based on the DC bus voltage. If the rectifier module 11 is not malfunctioning, its drive signal is turned off, and the inverter 12's drive signal is turned on. The residual current on the DC bus from the previous step is used to determine whether the inverter 12 is malfunctioning, thereby achieving hardware self-testing of the power module. This method is simple and effective, avoiding post-power-on failures.

[0029] In one possible implementation, refer to Figure 3 The rectifier module 11 may include a controllable rectifier 111 and a DC-DC converter 112; the input terminal of the controllable rectifier 111 is connected to the input terminal of the rectifier module 11, the positive output terminal of the controllable rectifier 111 is connected to the positive input terminal of the DC-DC converter 112, and the negative output terminal of the controllable rectifier 111 is connected to the negative input terminal of the DC-DC converter 112; the positive output terminal of the DC-DC converter 112 is connected to the positive output terminal of the rectifier module 11, and the negative output terminal of the DC-DC converter 112 is connected to the negative output terminal of the rectifier module 11.

[0030] S102 may include:

[0031] S1021: Turn on the drive signal of the controllable rectifier 111 and turn off the drive signal of the DC converter 112;

[0032] S1022: If, within the first preset time period after the moment when the drive signal of the controllable rectifier 111 is turned on and the drive signal of the DC converter 112 is turned off, the maximum value of the inductor current of the DC converter 112 is greater than the preset current and the maximum value of the DC bus voltage is less than the preset voltage, then the controllable rectifier 111 is determined to be normal and the DC converter 112 is faulty.

[0033] S1023: If, within the first preset time period, the maximum value of the inductor current of the DC converter 112 is not greater than the preset current, and the maximum value of the DC bus voltage is less than the preset voltage, then the controllable rectifier 111 is determined to be faulty, and / or the DC converter 112 is determined to be faulty.

[0034] refer to Figure 3, the rectifier module 11 includes a controllable rectifier 111 and a DC converter 112. The drive of the DC converter 112 can be closed first, and only the drive of the controllable rectifier 111 is opened, the controllable rectifier 111 charges the DC bus (positive DC bus BUS+ and negative DC bus BUS-), and the DC bus is slowly started. If the DC bus cannot be boosted within the first preset time, it indicates that the rectifier module 11 is faulty. At the same time, if the DC bus cannot be boosted and there is a large current, it indicates that the controllable rectifier 111 can normally rectify; but the drive of the DC converter 112 is closed, but there is a large current, which indicates that there may be a short circuit in the DC converter 112, and the DC converter 112 can be determined to be faulty.

[0035] If the DC bus cannot be boosted and there is no large current, both the DC converter 112 and the controllable rectifier 111 may be faulty, and the fault position cannot be determined.

[0036] In a possible implementation, S102 can further include:

[0037] S1024: If the maximum value of the DC bus voltage is not less than the preset voltage within the first preset time, the drive signal of the controllable rectifier 111 is closed, and the drive signal of the DC converter 112 is opened;

[0038] S1025: If the minimum value of the DC bus voltage is less than the preset voltage within the second preset time after the moment when the drive signal of the controllable rectifier 111 is closed and the drive signal of the DC converter 112 is opened, it is determined that the DC converter 112 is faulty;

[0039] S1026: If the minimum value of the DC bus voltage is not less than the preset voltage within the second preset time, it is determined that the rectifier module 11 is normal.

[0040] Further, if the DC bus can be boosted, it indicates that the rectifier module 11 can be normal. At this time, the drive signal of the controllable rectifier 111 is closed, and the drive signal of the DC converter 112 is opened. Since the DC converter 112 is unidirectional, and the drive of the inverter 12 is closed, the DC bus voltage should remain unchanged. Therefore, if the DC bus voltage can be maintained within the second preset time, it indicates that the rectifier module 11 is normal. If the DC bus voltage decreases rapidly within the second preset time, it indicates that there is a short circuit in the DC converter 112, and the DC converter 112 can be determined to be faulty.

[0041] In a possible implementation, reference can be made to Figure 4The direct current converter 112 can include a first inductor L1, a second inductor L2, a first switch Q1, a second switch Q2, a first diode D1, a second diode D2, a first bus capacitor C1, and a second bus capacitor C2. The first end of the first inductor L1 is connected to the positive input end of the direct current converter 112, and the second end of the first inductor L1 is connected to the first end of the first switch Q1 and the anode of the first diode D1. The cathode of the first diode D1 is connected to the first end of the first bus capacitor C1 and the positive output end of the direct current converter 112. The second end of the first switch Q1 is connected to the first end of the second switch Q2, the second end of the first bus capacitor C1, and the first end of the second bus capacitor C2. The first end of the second inductor L2 is connected to the negative input end of the direct current converter 112, and the second end of the second inductor L2 is connected to the second end of the second switch Q2 and the cathode of the second diode D2. The anode of the second diode D2 is connected to the second end of the second bus capacitor C2 and the negative output end of the direct current converter 112.

[0042] S1022 can include:

[0043] 1. Determine that the controllable rectifier 111 is normal, the first switch Q1 is short-circuited, and / or the second switch Q2 is short-circuited.

[0044] If the direct current bus cannot be boosted, and there is a large current, it can be determined that there is a short circuit in the direct current converter 112. Referring to the circuit diagram of the direct current converter 112 in Figure 4 , it can be determined that only the first switch Q1 and / or the second switch Q2 is short-circuited. Figure 4

[0045] In one possible implementation, S1023 can include:

[0046] 1. Determine that the controllable diode in the controllable rectifier 111 is open, and / or the first diode D1 is open, and / or the second diode D2 is open.

[0047] If the direct current bus cannot be boosted, and there is no large current, it means that the controllable rectifier 111 cannot rectify, that is, the controllable switch is open, and cannot deliver electrical energy to the direct current bus; or the elements in the direct current converter 112 are open. Based on the circuit diagram of the direct current converter 112 in Figure 4 , since the probability of inductor failure is usually very small, it can be determined that the first diode D1 is open, and / or the second diode D2 is open.

[0048] In one possible implementation, referring to Figure 4 ​The controllable rectifier 111 can include a first controllable diode SCR1 and a second controllable diode SCR2; the anode of the first controllable diode SCR1 is connected with the AC input end of the controllable rectifier 111 and the cathode of the second controllable diode SCR2 respectively, and the cathode of the first controllable diode SCR1 is connected with the positive output end of the controllable rectifier 111; the anode of the second controllable diode SCR2 is connected with the negative output end of the controllable rectifier 111.

[0049] The above determination of the open circuit of the controllable diode in the controllable rectifier 111 includes:

[0050] Determination of the open circuit of the first controllable diode SCR1 and / or the second controllable diode SCR2.

[0051] Based on Figure 4 The circuit diagram of the controllable rectifier 111 shows that the first controllable diode SCR1 and / or the second controllable diode SCR2 are open circuit

[0052] In a possible implementation, with reference to Figure 4 The DC converter 112 can include a first inductor L1, a second inductor L2, a first switch tube Q1, a second switch tube Q2, a first diode D1, a second diode D2, a first bus capacitor C1 and a second bus capacitor C2; the first end of the first inductor L1 is connected with the positive input end of the DC converter 112, and the second end of the first inductor L1 is connected with the first end of the first switch tube Q1 and the anode of the first diode D1 respectively; the cathode of the first diode D1 is connected with the first end of the first bus capacitor C1 and the positive output end of the DC converter 112 respectively; the second end of the first switch tube Q1 is connected with the first end of the second switch tube Q2, the second end of the first bus capacitor C1 and the first end of the second bus capacitor C2 respectively; the first end of the second inductor L2 is connected with the negative input end of the DC converter 112, and the second end of the second inductor L2 is connected with the second end of the second switch tube Q2 and the cathode of the second diode D2 respectively; the anode of the second diode D2 is connected with the second end of the second bus capacitor C2 and the negative output end of the DC converter 112 respectively.

[0053] S1025 can include determination of the short circuit of the first diode D1 and / or the short circuit of the second diode D2.

[0054] After the driving signal of the controllable rectifier 111 is turned off and the driving signal of the DC converter 112 is turned on, the DC bus voltage cannot be maintained, indicating that there is a short circuit in the DC converter 112. Based on Figure 5 It can be determined that the first diode D1 and / or the second diode D2 are short-circuited, and the DC bus voltage is discharged through the short-circuited first diode D1 or second diode D2, resulting in a voltage drop.

[0055] In a possible implementation, S103 can include:

[0056] 1. Obtain the output voltage of the inverter 12.

[0057] 2. If the voltage at the output of the inverter 12 is an AC voltage, determine that the inverter 12 is normal.

[0058] 3. If the voltage at the output of the inverter 12 is not an AC voltage, determine that the inverter 12 is faulty.

[0059] By determining that the rectifier module 11 is normal, the DC bus voltage is normal at this time. The drive of the rectifier module 11 is turned off, the drive of the inverter 12 is turned on, and the inverter 12 is detected by using the residual power on the DC bus. If the inverter 12 is normal, the AC power can be output, thereby determining whether the inverter 12 has a hardware fault.

[0060] In a possible implementation, S103 can include:

[0061] 1. Obtain the change amount of the DC bus voltage within a third preset time period starting from the time when the drive signal of the rectifier module 11 is turned off and the drive signal of the inverter 12 is turned on.

[0062] 2. If the change amount is greater than a preset change amount, determine that the inverter 12 is normal.

[0063] 3. If the change amount is not greater than the preset change amount, determine that the inverter 12 is faulty.

[0064] In the embodiment of the application, only the residual power on the DC bus capacitor (C1 and C2) is used to supply power to the inverter 12. If the inverter 12 is normal, since the drive of the rectifier module 11 is turned off, there is no energy supplement, the power on the DC bus capacitor is drawn by the inverter 12, and the DC bus voltage will quickly decrease. Conversely, if the DC bus voltage decreases too slowly, it indicates that the inverter 12 is faulty, thereby accurately determining whether the inverter 12 is faulty.

[0065] Further, it can be detected whether there is a DC component in the output of the inverter 12. If there is, it indicates that the inverter 12 has a short-circuit fault.

[0066] It should be understood that the size of the serial number of each step in the above embodiment does not mean the order of execution. The execution order of each process should be determined according to its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiment of the application.

[0067] The following is a device embodiment of the application. For details not described in detail, reference can be made to the corresponding method embodiments described above.

[0068] Figure 1A structure diagram of the power module is shown in the figure. For the convenience of description, only the parts related to the embodiments of the present application are shown, and the details are as follows:

[0069] Reference Figure 5 The power module includes a rectifier module 11, a positive DC bus BUS+, a negative DC bus BUS-, and an inverter 12. The input end of the rectifier module 11 is connected with an AC power supply. The positive output end of the rectifier module 11 is connected with the positive input end of the inverter 12 through the positive DC bus BUS+. The negative output end of the rectifier module 11 is connected with the negative input end of the inverter 12 through the negative DC bus BUS-. The output end of the inverter 12 outputs AC power. Figure 6 As shown in the figure, the power module includes a power-on self-diagnosis device, which includes:

[0070] a drive control module 21, configured to close the drive signal of the inverter 12;

[0071] a first fault detection module 22, configured to open the drive signal of the rectifier module 11 and determine whether the rectifier module 11 is abnormal according to the DC bus voltage; wherein opening the drive signal of the rectifier module 11 includes opening the drive signal of part of the elements in the rectifier module 11;

[0072] a second fault detection module 23, configured to close the drive signal of the rectifier module 11, open the drive signal of the inverter 12, and determine whether the inverter 12 is abnormal if the rectifier module 11 is normal;

[0073] wherein the DC bus voltage is the voltage difference between the positive DC bus BUS+ and the negative DC bus BUS-.

[0074] In a possible implementation, the rectifier module 11 can include a controllable rectifier 111 and a DC converter 112. The input end of the controllable rectifier 111 is connected with the input end of the rectifier module 11. The positive output end of the controllable rectifier 111 is connected with the positive input end of the DC converter 112. The negative output end of the controllable rectifier 111 is connected with the negative input end of the DC converter 112. The positive output end of the DC converter 112 is connected with the positive output end of the rectifier module 11. The negative output end of the DC converter 112 is connected with the negative output end of the rectifier module 11.

[0075] The first fault detection module 22 can include:

[0076] a first drive control unit, configured to open the drive signal of the controllable rectifier 111 and close the drive signal of the DC converter 112;

[0077] The first judging unit is configured to determine that the controllable rectifier 111 is normal and the DC converter 112 is faulty if, within a first preset time period after a time point when the driving signal of the controllable rectifier 111 is turned on and the driving signal of the DC converter 112 is turned off, the maximum value of the inductor current of the DC converter 112 is greater than a preset current and the maximum value of the DC bus voltage is less than a preset voltage.

[0078] The second judging unit is configured to determine that the controllable rectifier 111 is faulty and / or the DC converter 112 is faulty if, within the first preset time period, the maximum value of the inductor current of the DC converter 112 is not greater than the preset current and the maximum value of the DC bus voltage is less than the preset voltage.

[0079] In a possible implementation, the first fault detection module 22 can further include:

[0080] The third judging unit is configured to turn off the driving signal of the controllable rectifier 111 and turn on the driving signal of the DC converter 112 if, within the first preset time period, the maximum value of the DC bus voltage is not less than the preset voltage.

[0081] The fourth judging unit is configured to determine that the DC converter 112 is faulty if, within a second preset time period after a time point when the driving signal of the controllable rectifier 111 is turned off and the driving signal of the DC converter 112 is turned on, the minimum value of the DC bus voltage is less than the preset voltage.

[0082] The fifth judging unit is configured to determine that the rectification module 11 is normal if, within the second preset time period, the minimum value of the DC bus voltage is not less than the preset voltage.

[0083] In a possible implementation, the DC converter 112 includes a first inductor L1, a second inductor L2, a first switch Q1, a second switch Q2, a first diode D1, a second diode D2, a first bus capacitor C1, and a second bus capacitor C2. The first end of the first inductor L1 is connected with the positive input end of the DC converter 112, and the second end of the first inductor L1 is connected with the first end of the first switch Q1 and the anode of the first diode D1 respectively. The cathode of the first diode D1 is connected with the first end of the first bus capacitor C1 and the positive output end of the DC converter 112 respectively. The second end of the first switch Q1 is connected with the first end of the second switch Q2, the second end of the first bus capacitor C1, and the first end of the second bus capacitor C2 respectively. The first end of the second inductor L2 is connected with the negative input end of the DC converter 112, and the second end of the second inductor L2 is connected with the second end of the second switch Q2 and the cathode of the second diode D2 respectively. The anode of the second diode D2 is connected with the second end of the second bus capacitor C2 and the negative output end of the DC converter 112 respectively.

[0084] The first judging unit can be specifically configured to determine that the controllable rectifier 111 is normal, the first switch tube Q1 is short-circuited, and / or the second switch tube Q2 is short-circuited.

[0085] In a possible implementation, the second judging unit can be specifically configured to:

[0086] determine that the controllable diode in the controllable rectifier 111 is open, and / or the first diode D1 is open, and / or the second diode D2 is open.

[0087] In a possible implementation, the controllable rectifier 111 includes a first controllable diode SCR1 and a second controllable diode SCR2; an anode of the first controllable diode SCR1 is connected with an alternating current input end of the controllable rectifier 111 and a cathode of the second controllable diode SCR2 respectively, a cathode of the first controllable diode SCR1 is connected with a positive output end of the controllable rectifier 111; an anode of the second controllable diode SCR2 is connected with a negative output end of the controllable rectifier 111.

[0088] The above determination that the controllable diode in the controllable rectifier 111 is open can be specifically configured to:

[0089] determine that the first controllable diode SCR1 and / or the second controllable diode SCR2 is open.

[0090] In a possible implementation, the direct current converter 112 includes a first inductor L1, a second inductor L2, a first switch tube Q1, a second switch tube Q2, a first diode D1, a second diode D2, a first bus capacitor C1, and a second bus capacitor C2; a first end of the first inductor L1 is connected with a positive input end of the direct current converter 112, a second end of the first inductor L1 is connected with a first end of the first switch tube Q1 and an anode of the first diode D1 respectively; a cathode of the first diode D1 is connected with a first end of the first bus capacitor C1 and a positive output end of the direct current converter 112 respectively; a second end of the first switch tube Q1 is connected with a first end of the second switch tube Q2, a second end of the first bus capacitor C1, and a first end of the second bus capacitor C2 respectively; a first end of the second inductor L2 is connected with a negative input end of the direct current converter 112, a second end of the second inductor L2 is connected with a second end of the second switch tube Q2 and a cathode of the second diode D2 respectively; an anode of the second diode D2 is connected with a second end of the second bus capacitor C2 and a negative output end of the direct current converter 112 respectively.

[0091] The fourth judging unit can be specifically configured to determine that the first diode D1 is short-circuited and / or the second diode D2 is short-circuited.

[0092] In a possible implementation, the second fault detection module 23 can include:

[0093] A voltage acquisition unit is used to acquire the output voltage of inverter 12;

[0094] The sixth judgment unit is used to determine that the inverter 12 is normal if the voltage at the output terminal of the inverter 12 is an AC voltage.

[0095] The seventh judgment unit is used to determine that the inverter 12 is faulty if the voltage at the output terminal of the inverter 12 is not an AC voltage.

[0096] Figure 6 This is a schematic diagram of the control terminal provided in an embodiment of the present invention. Figure 2 As shown, the control terminal 6 in this embodiment includes a processor 60 and a memory 61. The memory 61 stores a computer program 62, and the processor 60 calls and runs the computer program 62 stored in the memory 61 to execute the steps in the above-described power module power-on self-diagnosis method embodiments, for example... Figure 5 The steps S101 to S103 are shown. Alternatively, the processor 60 is used to call and run the computer program 62 stored in the memory 61 to implement the functions of each module / unit in the above-described device embodiments, for example... Figure 5 The functions of modules 21 to 23 are shown.

[0097] For example, computer program 62 can be divided into one or more modules / units, one or more of which are stored in memory 61 and executed by processor 60 to complete the present invention. One or more modules / units can be a series of computer program instruction segments capable of performing a specific function, which describe the execution process of computer program 62 in control terminal 6. For example, computer program 62 can be divided into... Figure 6 Modules / units 21 to 23 are shown.

[0098] The control terminal 6 can be a computing device such as a desktop computer, laptop, handheld computer, or cloud server. The control terminal 6 may include, but is not limited to, a processor 60 and a memory 61. Those skilled in the art will understand that... Figure 1 This is merely an example of control terminal 6 and does not constitute a limitation on control terminal 6. It may include more or fewer components than shown, or combine certain components, or different components. For example, the terminal may also include input / output devices, network access devices, buses, etc.

[0099] The processor 60 can be a central processing unit (CPU), and can also be other general-purpose processors 60, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic, discrete hardware components, etc. The general-purpose processor 60 can be a microprocessor or the processor 60 can also be any conventional processor.

[0100] The memory 61 can be an internal storage unit of the terminal 6, such as a hard disk or a memory of the terminal 6. The memory 61 can also be an external storage device of the terminal 6, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. Further, the memory 61 can include both the internal storage unit and the external storage device of the terminal 6. The memory 61 is used to store computer programs and other programs and data required by the terminal. The memory 61 can also be used to temporarily store data that has been output or is to be output.

[0101] It can be clearly understood by those skilled in the art that, for the convenience and brevity of description, only the division of the above functional units and modules is exemplified, and in actual application, the above functions can be completed by different functional units and modules according to needs, that is, the internal structure of the device is divided into different functional units or modules to complete all or part of the above described functions. Each functional unit and module in the embodiment can be integrated in one processing unit, or each unit can exist physically, or two or more units can be integrated in one unit, and the integrated unit can be realized in the form of hardware or in the form of software functional unit. In addition, the specific names of each functional unit and module are only for easy distinction, and do not limit the protection scope of the present application. The specific working process of the units and modules in the above system can refer to the corresponding process in the foregoing method embodiments, which will not be described here.

[0102] In the above embodiments, the description of each embodiment has its own emphasis, and the parts not described or recorded in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0103] Those skilled in the art can understand that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be realized by electronic hardware or a combination of computer software and electronic hardware. Whether the functions are realized in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0104] In the embodiments provided by the present application, it should be understood that the disclosed apparatus / terminal and method can be implemented in other ways. For example, the apparatus / terminal embodiments described above are merely schematic. For example, the division of the modules or units is merely a logical function division, and there can be another division manner in actual implementation. For example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed coupling or direct coupling or communication connection between the units can be indirect coupling or communication connection through some interface, device or unit, and can be electrical, mechanical or in other forms.

[0105] The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, i.e. can be located in one place, or can be distributed on a plurality of network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the embodiments.

[0106] In addition, each functional unit in each embodiment of the present application can be integrated into a processing unit, or each unit can exist physically independently, or two or more units can be integrated into one unit. The integrated unit can be realized in the form of hardware or in the form of a software functional unit.

[0107] The integrated module / unit, if realized in the form of a software function unit and sold or used as an independent product, can be stored in a computer-readable storage medium. Based on such understanding, all or part of the processes in the above-mentioned embodiment methods can also be completed by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and the computer program can realize the steps of each method embodiment when executed by the processor 60. The computer program includes computer program code, which can be in the form of source code, object code, an executable file, or some intermediate form, etc. The computer-readable medium can include any entity or device capable of carrying the computer program code, a recording medium, a U disk, a mobile hard disk, a magnetic disk, an optical disk, a computer memory, a read-only memory (Read-Only Memory, ROM), a random access memory (Random Access Memory, RAM), an electrical carrier signal, a telecommunication signal, and a software distribution medium, etc.

[0108] Corresponding to the control terminal 6 described above, the embodiment of the application further provides a UPS, comprising: ​ a power module as shown and the control terminal provided by the above embodiment;

[0109] The power module is controlled by the control terminal.

[0110] The power control module realizes the hardware self-checking of the power module under the control of the control terminal, so as to avoid the occurrence of faults.

[0111] The above-described embodiments are only used to illustrate the technical solutions of the application, rather than limit them; although the application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the application, and should be included in the protection scope of the application.

Claims

1. A power-on self-diagnostic method for a power module, characterized in that, The power module includes: a rectifier module, a positive DC bus, a negative DC bus, and an inverter; the input terminal of the rectifier module is connected to an AC power source, the positive output terminal of the rectifier module is connected to the positive input terminal of the inverter via the positive DC bus, the negative output terminal of the rectifier module is connected to the negative input terminal of the inverter via the negative DC bus, and the output terminal of the inverter outputs AC power; the power-on self-diagnosis method includes: Turn off the drive signal of the inverter; The drive signal for activating the rectifier module is turned on, and the rectifier module is checked for abnormality based on the DC bus voltage; wherein, the drive signal for activating the rectifier module includes drive signals for activating some components in the rectifier module; If the rectifier module is normal, then turn off the drive signal of the rectifier module, turn on the drive signal of the inverter, and determine whether the inverter is abnormal. Wherein, the DC bus voltage is the voltage difference between the positive DC bus and the negative DC bus; The rectifier module includes a controllable rectifier and a DC-DC converter; the input terminal of the controllable rectifier is connected to the input terminal of the rectifier module, the positive output terminal of the controllable rectifier is connected to the positive input terminal of the DC-DC converter, and the negative output terminal of the controllable rectifier is connected to the negative input terminal of the DC-DC converter; the positive output terminal of the DC-DC converter is connected to the positive output terminal of the rectifier module, and the negative output terminal of the DC-DC converter is connected to the negative output terminal of the rectifier module. The step of activating the drive signal for the rectifier module and determining whether the rectifier module is malfunctioning based on the DC bus voltage includes: Turn on the drive signal of the controllable rectifier and turn off the drive signal of the DC converter; If, within a first preset time period after the moment when the drive signal of the controllable rectifier is turned on and the drive signal of the DC converter is turned off, the maximum value of the inductor current of the DC converter is greater than a preset current and the maximum value of the DC bus voltage is less than a preset voltage, then the controllable rectifier is determined to be normal and the DC converter is faulty. If, within the first preset time period, the maximum value of the inductor current of the DC-DC converter is not greater than the preset current, and the maximum value of the DC bus voltage is less than the preset voltage, then the controllable rectifier is determined to be faulty, and / or the DC-DC converter is determined to be faulty.

2. The power-on self-diagnosis method for a power module according to claim 1, characterized in that, The step of activating the drive signal for the rectifier module and determining whether the rectifier module is malfunctioning based on the DC bus voltage also includes: If the maximum value of the DC bus voltage is not less than the preset voltage within the first preset time period, then the drive signal of the controllable rectifier is turned off and the drive signal of the DC converter is turned on. If, within a second preset time period after the moment when the drive signal of the controllable rectifier is turned off and the drive signal of the DC converter is turned on, the minimum value of the DC bus voltage is less than the preset voltage, then the DC converter is determined to be faulty. If the minimum value of the DC bus voltage is not less than the preset voltage within the second preset time period, then the rectifier module is determined to be normal.

3. The power-on self-diagnosis method for a power module according to claim 1, characterized in that, The DC-DC converter includes: a first inductor, a second inductor, a first switching transistor, a second switching transistor, a first diode, a second diode, a first bus capacitor, and a second bus capacitor; a first terminal of the first inductor is connected to the positive input terminal of the DC-DC converter, and a second terminal of the first inductor is connected to the first terminal of the first switching transistor and the anode of the first diode; the cathode of the first diode is connected to the first terminal of the first bus capacitor and the positive output terminal of the DC-DC converter; a second terminal of the first switching transistor is connected to the first terminal of the second switching transistor, the second terminal of the first bus capacitor, and the first terminal of the second bus capacitor; a first terminal of the second inductor is connected to the negative input terminal of the DC-DC converter, and a second terminal of the second inductor is connected to the second terminal of the second switching transistor and the cathode of the second diode; the anode of the second diode is connected to the second terminal of the second bus capacitor and the negative output terminal of the DC-DC converter. The determination that the controllable rectifier is normal and the DC converter is faulty includes: It is determined that the controllable rectifier is normal, and the first switch is short-circuited and / or the second switch is short-circuited.

4. The power-on self-diagnosis method for a power module according to claim 3, characterized in that, The determination of a fault in the controllable rectifier and / or the DC-DC converter includes: It is determined that the controllable diode in the controllable rectifier is open, and / or the first diode is open, and / or the second diode is open.

5. The power-on self-diagnosis method for a power module according to claim 4, characterized in that, The controllable rectifier includes: a first controllable diode and a second controllable diode; the anode of the first controllable diode is connected to the AC input terminal of the controllable rectifier and the cathode of the second controllable diode, respectively, and the cathode of the first controllable diode is connected to the positive output terminal of the controllable rectifier; the anode of the second controllable diode is connected to the negative output terminal of the controllable rectifier. Determining that the controllable diode in the controllable rectifier is open-circuited includes: Determine that the first controllable diode and / or the second controllable diode are open.

6. The power-on self-diagnosis method for a power module according to claim 2, characterized in that, The DC-DC converter includes: a first inductor, a second inductor, a first switching transistor, a second switching transistor, a first diode, a second diode, a first bus capacitor, and a second bus capacitor; a first terminal of the first inductor is connected to the positive input terminal of the DC-DC converter, and a second terminal of the first inductor is connected to the first terminal of the first switching transistor and the anode of the first diode; the cathode of the first diode is connected to the first terminal of the first bus capacitor and the positive output terminal of the DC-DC converter; a second terminal of the first switching transistor is connected to the first terminal of the second switching transistor, the second terminal of the first bus capacitor, and the first terminal of the second bus capacitor; a first terminal of the second inductor is connected to the negative input terminal of the DC-DC converter, and a second terminal of the second inductor is connected to the second terminal of the second switching transistor and the cathode of the second diode; the anode of the second diode is connected to the second terminal of the second bus capacitor and the negative output terminal of the DC-DC converter. The determination of the DC converter fault includes: Determine that the first diode is short-circuited and / or the second diode is short-circuited.

7. The power-on self-diagnosis method for a power module according to any one of claims 2 to 6, characterized in that, Determining whether the inverter is malfunctioning includes: Obtain the output voltage of the inverter; If the voltage at the output terminal of the inverter is an AC voltage, then the inverter is considered to be functioning normally. If the voltage at the output of the inverter is not an AC voltage, then the inverter is determined to be faulty.

8. A control terminal, characterized in that, It includes a processor and a memory, the memory being used to store a computer program, and the processor being used to call and run the computer program stored in the memory to perform the power-on self-diagnosis method of the power module as described in any one of claims 1 to 7.

9. A UPS, characterized in that, include: Power module and control terminal as described in claim 8; The power module is controlled by the control terminal.

Images