CN113708357A - Power-on short-circuit protection circuit and method for server - Google Patents
Power-on short-circuit protection circuit and method for server Download PDFInfo
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Abstract
The application discloses power-on short-circuit protection circuit and method of a server, wherein the circuit comprises: the power interface of the server mainboard is communicated with an external UPS (uninterrupted power supply) through a switch in the switch control module; the impedance acquisition module is arranged at the power interface and used for monitoring the impedance at the power interface and sending an abnormal signal to the short-circuit protection control module when the impedance is smaller than a preset resistance value; the current acquisition module is arranged at the power interface and used for monitoring the current at the power interface and sending an abnormal signal to the short-circuit protection control module when the current is greater than a preset current value; and the short-circuit protection control module is used for sending a turn-off signal to the switch control module to disconnect the connection between the server mainboard and the UPS after receiving any abnormal signal. The impedance and the current of monitoring server mainboard power interface can in time discover power-on short circuit fault, cut off the power as soon as possible, prevent further deterioration of fault, and improve the operation safety of equipment.
Description
Technical Field
The present disclosure relates to the field of server technologies, and in particular, to a power-on short-circuit protection circuit and method for a server.
Background
When the server is powered on at the moment of starting, if a short circuit problem occurs, overcurrent can be caused, and related components can be even burnt in serious conditions, so that equipment is damaged. However, the current prior art does not effectively prevent this problem. In view of the above, it is an important need for those skilled in the art to provide a solution to the above technical problems.
Disclosure of Invention
The application aims to provide a power-on short-circuit protection circuit and a power-on short-circuit protection method for a server, so that power-on short-circuit faults of the server can be effectively detected and timely processed, and further damage to equipment is prevented.
In order to solve the above technical problem, on one hand, the present application discloses a power-on short circuit protection circuit of a server, including:
the power interface of the server mainboard is communicated with an external UPS (uninterrupted power supply) through a switch in the switch control module;
the impedance acquisition module is arranged at the power interface and used for monitoring the impedance at the power interface and sending an abnormal signal to the short-circuit protection control module when the impedance is smaller than a preset resistance value;
the current acquisition module is arranged at the power interface and used for monitoring the current at the power interface and sending an abnormal signal to the short-circuit protection control module when the current is greater than a preset current value;
the short-circuit protection control module is respectively connected with the impedance acquisition module and the current acquisition module and used for sending a turn-off signal to the switch control module to disconnect the server mainboard from the UPS after receiving any one abnormal signal.
Optionally, the switch control module is further configured to:
and after receiving the normal signal sent by the impedance acquisition module and the normal signal sent by the current acquisition module, controlling the switch to be closed so as to connect the server mainboard with the UPS.
Optionally, the method further comprises:
and the battery module is used for supplying power to the impedance acquisition module and the current acquisition module, and after the switch control module controls the switch to be closed so that the server mainboard is connected with the UPS power supply, the server mainboard cuts off a power supply path of the battery module after being electrified.
Optionally, the method further comprises:
and the alarm module is respectively connected with the impedance acquisition module and the current acquisition module and used for giving an alarm after receiving any one abnormal signal.
Optionally, the alarm module is specifically a buzzer alarm circuit.
Optionally, the method further comprises:
and the storage module is used for storing the record of the turn-off instruction sent by the short-circuit protection control module so that the server mainboard generates an alarm log after being electrified and read.
Optionally, the short-circuit protection control module includes a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a first diode, a second diode, a third diode, a first capacitor, a second capacitor, and a third capacitor;
the emitting electrode of the first triode and the cathode of the first diode are both connected with a power supply; the anode of the first diode is grounded through the first capacitor and is connected to the base of the first triode through the second resistor; the first resistor is connected between the emitter and the base of the first triode;
the second capacitor is connected between the emitter and the collector of the first triode in parallel; the emitter of the second triode is connected with the emitter of the first triode, and the base of the second triode is connected with the collector of the first triode;
the third capacitor is connected between the emitter and the collector of the second triode in parallel; an emitting electrode of the third triode is connected with an emitting electrode of the second triode, and a base electrode of the third triode is connected with a collector electrode of the second triode and grounded through the third resistor; the collector of the third triode is connected to the anode of the second diode and is grounded through the fifth resistor; the first end of the fourth resistor is connected to the collector of the first triode, and the other end of the fourth resistor is connected to the anode of the second diode;
the cathode of the second diode is used as the output end of the short-circuit protection control module and is respectively connected to the first end of the sixth resistor and the cathode of the third diode; the second end of the sixth resistor and the anode of the third diode are grounded.
In another aspect, the present application discloses a power-on short-circuit protection method for a server, in which a power interface of a server motherboard is connected to an external UPS power supply through a switch in a switch control module, and an impedance collection module and a current collection module are disposed at the power interface; the method comprises the following steps:
monitoring impedance at the power interface through the impedance acquisition module, and generating an abnormal signal when the impedance is smaller than a preset resistance value;
monitoring the current at the power interface through the current acquisition module, and generating an abnormal signal when the current is smaller than a preset resistance value;
and after any one abnormal signal is received, generating a shutdown signal to the switch control module to disconnect the connection between the server mainboard and the UPS.
Optionally, the method further comprises:
and after receiving the normal signal sent by the impedance acquisition module and the normal signal sent by the current acquisition module, controlling the switch to be closed so as to connect the server mainboard with the UPS.
Optionally, the impedance collection module and the current collection module are powered by a battery module; after the generating a shutdown signal to the switch control module to disconnect the server motherboard from the UPS power supply, the method further includes:
and the server mainboard cuts off a power supply path of the battery module after being electrified.
Optionally, the method further comprises:
and the alarm module alarms after receiving any one abnormal signal.
The power-on short-circuit protection circuit and the power-on short-circuit protection method for the server have the advantages that: this application is through impedance and the electric current of monitoring server mainboard power source interface, can in time discover the last electric short circuit trouble of server to cut off the power as early as possible, prevent that the trouble from further worsening, improved server equipment's operation security.
Drawings
In order to more clearly illustrate the technical solutions in the prior art and the embodiments of the present application, the drawings that are needed to be used in the description of the prior art and the embodiments of the present application will be briefly described below. Of course, the following description of the drawings related to the embodiments of the present application is only a part of the embodiments of the present application, and it will be obvious to those skilled in the art that other drawings can be obtained from the provided drawings without any creative effort, and the obtained other drawings also belong to the protection scope of the present application.
Fig. 1 is a block diagram of a power-on short-circuit protection circuit of a server according to an embodiment of the present disclosure;
fig. 2 is a circuit structure diagram of a short-circuit protection control module disclosed in an embodiment of the present application;
fig. 3 is a circuit structure diagram of an alarm module disclosed in an embodiment of the present application;
fig. 4 is a circuit structure diagram of a current collecting module disclosed in the embodiment of the present application;
fig. 5 is a circuit structure diagram of another current collection module disclosed in the embodiment of the present application;
fig. 6 is a flowchart of a power-on short-circuit protection method for a server according to an embodiment of the present application.
Detailed Description
The core of the application is to provide a power-on short-circuit protection circuit and a power-on short-circuit protection method for a server, so that the power-on short-circuit fault of the server can be effectively detected and timely processed, and further damage to the equipment is prevented.
In order to more clearly and completely describe the technical solutions in the embodiments of the present application, the technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
When the server is powered on at the moment of starting, if a short circuit problem occurs, overcurrent can be caused, and related components can be even burnt in serious conditions, so that equipment is damaged. However, the current prior art does not effectively prevent this problem. In view of this, the present application provides a power-on short-circuit protection scheme for a server, which can effectively solve the above problem.
Referring to fig. 1, an embodiment of the present application discloses a power-on short-circuit protection circuit for a server, which mainly includes:
the power interface of the server mainboard is communicated with an external UPS (uninterrupted power supply) through a switch in the switch control module 101;
the impedance acquisition module 102 is arranged at the power interface, and is used for monitoring the impedance at the power interface and sending an abnormal signal to the short-circuit protection control module 104 when the impedance is smaller than a preset resistance value;
the current acquisition module 103 is arranged at the power interface, and is used for monitoring the current at the power interface and sending an abnormal signal to the short-circuit protection control module 104 when the current is greater than a preset current value;
the short-circuit protection control module 104 is connected to the impedance collection module 102 and the current collection module 103, and configured to send a shutdown signal to the switch control module 101 to disconnect the connection between the server motherboard and the UPS (Uninterruptible Power Supply) Power Supply after receiving any one of the abnormal signals.
The power-on short-circuit protection circuit of the server provided by the embodiment of the application specifically comprises an impedance acquisition module 102 and a current acquisition module 103 which are arranged at a power interface of a server mainboard and are respectively used for monitoring the impedance and the current of the power interface. It is easy to understand that, after the UPS is powered on, if a power interface of the server motherboard has a short-circuit fault, the monitored impedance value will be lower than a preset resistance value and close to 0 Ω; and, the current value that can make the monitoring is higher than presetting the current value because of the short circuit produces the overcurrent phenomenon. Therefore, when the impedance of the power interface is lower than the preset resistance value or the current is larger than the preset current value, the power interface can be considered to have a short-circuit fault.
After the impedance acquisition module 102 and the current acquisition module 103 monitor that the impedance or the current is abnormal, they respectively send an abnormal signal to the short-circuit protection control module 104. After receiving any one of the abnormal signals, the short-circuit protection control module 104 controls the switch control module 101 to turn off the switch, that is, cuts off the power supply of the UPS to the server motherboard, thereby effectively and timely avoiding further deterioration of the fault problem.
Therefore, the power-on short-circuit protection circuit of the server can timely find the power-on short-circuit fault of the server by monitoring the impedance and the current of the power interface of the mainboard of the server, so that the power supply is cut off as soon as possible, the fault is prevented from further worsening, and the operation safety of server equipment is improved.
As a specific embodiment, in the power-on short-circuit protection circuit of the server provided in the embodiment of the present application, on the basis of the foregoing content, the switch control module 101 is further configured to:
after receiving the normal signal sent by the impedance collection module 102 and the normal signal sent by the current collection module 103, controlling the switch to be closed so as to connect the server motherboard with the UPS power supply.
Specifically, it should be emphasized that the switch control module 101 controls the switch to be closed only when the impedance collection module 102 and the current collection module 103 both send normal signals, that is, the impedance of the power interface is greater than a preset resistance value and the current is less than a preset current value, so as to allow the UPS power supply to start the server continuously.
As a specific embodiment, the power-on short-circuit protection circuit of a server provided in the embodiment of the present application further includes, on the basis of the foregoing content:
and the battery module is used for supplying power to the impedance acquisition module 102 and the current acquisition module 103, and after the switch control module 101 controls the switch to be closed so that the server mainboard is connected with the UPS power supply, the server mainboard cuts off a power supply path of the battery module after being powered on.
Specifically, in order to save energy, after it is determined that there is no power-on short circuit, when the server is powered on and enters the system, the power supply to the impedance acquisition module 102 and the signal acquisition module may be disconnected.
As a specific embodiment, the power-on short-circuit protection circuit of a server provided in the embodiment of the present application further includes, on the basis of the foregoing content:
and the alarm module is respectively connected with the impedance acquisition module 102 and the current acquisition module 103 and is used for giving an alarm after receiving any one abnormal signal.
Specifically, the alarm module can be used for rapidly notifying related management personnel to maintain the equipment, so that the problem of short circuit fault on the server is solved.
As a specific embodiment, in the power-on short-circuit protection circuit of the server provided in the embodiment of the present application, on the basis of the above contents, the alarm module is specifically a buzzer alarm circuit.
Of course, other forms of alert notification may be provided by those skilled in the art, such as in conjunction with a light flash, etc.
As a specific embodiment, the power-on short-circuit protection circuit of a server provided in the embodiment of the present application further includes, on the basis of the foregoing content:
and a storage module, configured to store a record of the shutdown instruction sent by the short-circuit protection control module 104, so that the server motherboard generates an alarm log after being powered on and read.
Specifically, the storage module records fault related information of each time, such as short circuit positioning position, time and the like, so that subsequent maintenance personnel can analyze the fault by looking up the alarm log.
Referring to fig. 2, fig. 2 is a circuit structure diagram of a short-circuit protection control module 104 according to an embodiment of the present disclosure.
As a specific embodiment, in the power-on short-circuit protection circuit of the server provided in the embodiment of the present application, on the basis of the above content, the short-circuit protection control module 104 includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a first diode D1, a second diode D2, a third diode D3, a first capacitor C1, a second capacitor C2, and a third capacitor C3;
the emitter of the first triode Q1 and the cathode of the first diode D1 are both connected with a power supply; the anode of the first diode D1 is grounded through the first capacitor C1 and is connected to the base of the first triode Q1 through the second resistor R2; the first resistor R1 is connected between the emitter and the base of the first triode Q1;
the second capacitor C2 is connected in parallel between the emitter and the collector of the first triode Q1; the emitter of the second triode Q2 is connected with the emitter of the first triode Q1, and the base of the second triode Q2 is connected with the collector of the first triode Q1;
the third capacitor C3 is connected in parallel between the emitter and the collector of the second triode Q2; the emitter of the third triode Q3 is connected with the emitter of the second triode Q2, the base of the third triode Q3 is connected with the collector of the second triode Q2, and the third resistor R3 is connected with the ground; the collector of the third triode Q3 is connected to the anode of the second diode D2 and to ground through the fifth resistor R5; a first end of the fourth resistor R4 is connected to the collector of the first transistor Q1, and the other end is connected to the anode of the second diode D2;
the cathode of the second diode D2 is used as the output terminal of the short-circuit protection control module 104, and is connected to the first end of the sixth resistor R6 and the cathode of the third diode D3, respectively; the second end of the sixth resistor R6 and the anode of the third diode D3 are grounded.
Specifically, C1, C2 and C3 are capacitors, which are not conductive and function to delay the conduction of the transistors connected in series. Thus, after power up, Q2 turns on after Q1 turns on, and then Q3 turns on to supply power backwards. When the output is short-circuited, the output of the short-circuit protection control module 104 is immediately turned off, i.e. the output is 0 at this time, so that the circuit is interrupted.
After Q3 is turned on, the load connected in the rear is electrified, the collector voltage of Q3 reaches about 13.3V, and Q2 is forced to be cut off. In the event of a short circuit, the collector of Q3 will be pulled low, turning on Q2, creating a self-lock, which in turn forces Q3 to turn off, and the load following Q3 turn off will have no voltage output, and no voltage output will occur even if the load is removed. It will be readily understood by those skilled in the art that if it is desired that Q3 can restore its output after the load is removed, a resistor, preferably about 1K Ω, may be connected across the C E junction of Q3.
Referring to fig. 3, fig. 3 is a circuit structure diagram of an alarm module disclosed in the embodiment of the present application.
The input end of the resistor R7 can be connected with pins of control chips such as a singlechip and the like, and R7 is a pull-up resistor for increasing the current driving capability of the pins. The R8 resistor is connected between the base of the triode Q4 and the IO port of the single chip microcomputer and is used for preventing the chip from being burnt due to overlarge voltage of the I0 port. The R9 resistor is connected in series with the LED D4 and is used for protecting the LED D4. The triode D4 plays a role of switch, and the high level of the base electrode of the triode D4 enables the triode D to be in saturation conduction, so that the buzzer connected with the emitter electrode of the triode D sends out alarm sound. When the base is low, the transistor Q4 will be turned off, and the buzzer will stop sounding.
Referring to fig. 4, fig. 4 is a circuit structure diagram of a current collecting module 103 disclosed in the embodiment of the present application.
Specifically, the present embodiment provides an amplifying circuit implemented based on the integrated operational amplifier OP 07. According to the circuit diagram, if R10 ═ R12 · R11/(R12 · + R11), the amplification factor of the circuit is specifically: k ═ 1+ R12/R11. Thus, different amplification factors can be selected by selecting different resistances. R12 chooses 4K omega for use, R11 chooses 1K omega for use, R10 chooses 0.8K omega for use, the magnification can reach 5 times, but because the influence of the system, the magnification can not reach the exact multiple, and this kind of amplification can not satisfy the processing to the big or small signal at the same time, therefore, can add a voltage comparison circuit in the front end of amplifier and compare voltage signal and reference voltage, can not need amplification when the voltage is greater than 1V.
Referring to fig. 5, fig. 5 is a circuit structure diagram of another current collection module 103 disclosed in the embodiment of the present application.
Specifically, this embodiment provides an amplifying circuit implemented based on the programmable amplifying device PGA103, and then a sample/hold circuit implemented based on the integrated circuit LF398 is connected thereto. In this embodiment, in consideration of satisfying the processing of the large and small signals, the programmable amplifier PGA103 amplifies the current signal, and the pin 1 and the pin 2 of the programmable amplifier PGA103 are controlled by the single chip microcomputer so that the amplification factor may be two different values of × 1(a0 ═ a1 ═ 0) or × 10(a0 ═ 1, a1 ═ 0) in order to satisfy the processing of the large and small signals at the same time.
Because will measure voltage, current signal simultaneously, consequently the holding circuit of the collection data that this application adopted can carry out the double-circuit based on keeping ware LF398 to the signal specifically and keep, controls keeping ware LF398 with singlechip P1.4 mouth. When the voltage signal is measured, the single chip microcomputer firstly converts the voltage signal, and at the moment, the current signal is sent to the retainer to be retained, and the voltage signal is waited to be processed. Therefore, the simultaneous measurement of voltage and current signals can be satisfied, and the error brought by the system is reduced.
In addition, the impedance acquisition module 102 may be specifically implemented based on the high-precision impedance measurement chip AD 5933. The AD5933 incorporates a frequency generator with a 12-bit AD converter with a sampling rate up to 1 MSPS. The frequency generator may generate a specific frequency to excite the external resistor, and the response signal obtained from the resistor is sampled by the ADC and subjected to discrete fourier transform by the DSP on chip.
The application can specifically adopt a minimum system for realizing impedance measurement by controlling AD5933 through a single chip microcomputer. The singlechip can specifically select AD mu C848 of ADI company. The singlechip microcomputer is communicated with the AD5933 through a serial port, the singlechip microcomputer controls the working mode of the AD5933 to be set, the measuring process is controlled, the measuring result is read, and related data are transmitted to the PC through the serial port.
Referring to fig. 6, an embodiment of the present application discloses a method for protecting a server against power-on short circuit, where a power interface of a server motherboard is connected to an external UPS power supply through a switch in a switch control module, and an impedance collection module and a current collection module are disposed at the power interface; the method mainly comprises the following steps:
s201: and monitoring the impedance at the power interface through the impedance acquisition module, and generating an abnormal signal when the impedance is smaller than a preset resistance value.
S202: the current at the power interface is monitored through the current acquisition module, and an abnormal signal is generated when the current is smaller than a preset resistance value.
S203: and after any one abnormal signal is received, generating a shutdown signal to the switch control module to disconnect the connection between the server mainboard and the UPS.
Therefore, according to the power-on short-circuit protection method for the server, disclosed by the embodiment of the application, the power-on short-circuit fault of the server can be found in time by monitoring the impedance and the current of the power interface of the mainboard of the server, so that the power supply is cut off as soon as possible, the fault is prevented from further worsening, and the operation safety of server equipment is improved.
For the specific content of the power-on short circuit protection method for the server, reference may be made to the foregoing detailed description of the power-on short circuit protection circuit for the server, and details thereof are not repeated here.
As a specific embodiment, the method for protecting a power-on short circuit of a server disclosed in the embodiment of the present application further includes, on the basis of the foregoing contents:
and after receiving the normal signal sent by the impedance acquisition module and the normal signal sent by the current acquisition module, controlling the switch to be closed so as to connect the server mainboard with the UPS.
As a specific embodiment, in the power-on short-circuit protection method for the server disclosed in the embodiment of the present application, on the basis of the above contents, the impedance acquisition module and the current acquisition module are powered by a battery module; after the generating a shutdown signal to the switch control module to disconnect the server motherboard from the UPS power supply, the method further includes:
and the server mainboard cuts off a power supply path of the battery module after being electrified.
As a specific embodiment, the method for protecting a power-on short circuit of a server disclosed in the embodiment of the present application further includes, on the basis of the foregoing contents:
and the alarm module alarms after receiving any one abnormal signal. Wherein, the alarm module can be specifically a buzzing alarm circuit.
The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. For the equipment disclosed by the embodiment, the description is relatively simple because the equipment corresponds to the method disclosed by the embodiment, and the relevant parts can be referred to the method part for description.
It is further noted that, throughout this document, relational terms such as "first" and "second" are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Furthermore, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The technical solutions provided by the present application are described in detail above. The principles and embodiments of the present application are explained herein using specific examples, which are provided only to help understand the method and the core idea of the present application. It should be noted that, for those skilled in the art, without departing from the principle of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall into the protection scope of the present application.
Claims (10)
1. A power-on short circuit protection circuit for a server, comprising:
the power interface of the server mainboard is communicated with an external UPS (uninterrupted power supply) through a switch in the switch control module;
the impedance acquisition module is arranged at the power interface and used for monitoring the impedance at the power interface and sending an abnormal signal to the short-circuit protection control module when the impedance is smaller than a preset resistance value;
the current acquisition module is arranged at the power interface and used for monitoring the current at the power interface and sending an abnormal signal to the short-circuit protection control module when the current is greater than a preset current value;
the short-circuit protection control module is respectively connected with the impedance acquisition module and the current acquisition module and used for sending a turn-off signal to the switch control module to disconnect the server mainboard from the UPS after receiving any one abnormal signal.
2. The power-on short protection circuit of claim 1, wherein the switch control module is further configured to:
and after receiving the normal signal sent by the impedance acquisition module and the normal signal sent by the current acquisition module, controlling the switch to be closed so as to connect the server mainboard with the UPS.
3. The power-on short protection circuit of claim 2, further comprising:
and the battery module is used for supplying power to the impedance acquisition module and the current acquisition module, and after the switch control module controls the switch to be closed so that the server mainboard is connected with the UPS power supply, the server mainboard cuts off a power supply path of the battery module after being electrified.
4. The power-on short protection circuit of claim 3, further comprising:
and the alarm module is respectively connected with the impedance acquisition module and the current acquisition module and used for giving an alarm after receiving any one abnormal signal.
5. The power-on short circuit protection circuit according to claim 4, wherein the alarm module is a buzzer alarm circuit.
6. The power-on short protection circuit of claim 5, further comprising:
and the storage module is used for storing the record of the turn-off instruction sent by the short-circuit protection control module so that the server mainboard generates an alarm log after being electrified and read.
7. The power-on short-circuit protection circuit according to claims 1 to 6, wherein the short-circuit protection control module comprises a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a first diode, a second diode, a third diode, a first capacitor, a second capacitor, and a third capacitor;
the emitting electrode of the first triode and the cathode of the first diode are both connected with a power supply; the anode of the first diode is grounded through the first capacitor and is connected to the base of the first triode through the second resistor; the first resistor is connected between the emitter and the base of the first triode;
the second capacitor is connected between the emitter and the collector of the first triode in parallel; the emitter of the second triode is connected with the emitter of the first triode, and the base of the second triode is connected with the collector of the first triode;
the third capacitor is connected between the emitter and the collector of the second triode in parallel; an emitting electrode of the third triode is connected with an emitting electrode of the second triode, and a base electrode of the third triode is connected with a collector electrode of the second triode and grounded through the third resistor; the collector of the third triode is connected to the anode of the second diode and is grounded through the fifth resistor; the first end of the fourth resistor is connected to the collector of the first triode, and the other end of the fourth resistor is connected to the anode of the second diode;
the cathode of the second diode is used as the output end of the short-circuit protection control module and is respectively connected to the first end of the sixth resistor and the cathode of the third diode; the second end of the sixth resistor and the anode of the third diode are grounded.
8. A power-on short circuit protection method of a server is characterized in that a power interface of a server mainboard is communicated with an external UPS through a switch in a switch control module, and an impedance acquisition module and a current acquisition module are arranged at the power interface; the method comprises the following steps:
monitoring impedance at the power interface through the impedance acquisition module, and generating an abnormal signal when the impedance is smaller than a preset resistance value;
monitoring the current at the power interface through the current acquisition module, and generating an abnormal signal when the current is smaller than a preset resistance value;
and after any one abnormal signal is received, generating a shutdown signal to the switch control module to disconnect the connection between the server mainboard and the UPS.
9. The power-on short circuit protection method according to claim 8, further comprising:
and after receiving the normal signal sent by the impedance acquisition module and the normal signal sent by the current acquisition module, controlling the switch to be closed so as to connect the server mainboard with the UPS.
10. The power-on short circuit protection method according to claim 9, wherein the impedance collection module and the current collection module are powered by a battery module; after the generating a shutdown signal to the switch control module to disconnect the server motherboard from the UPS power supply, the method further includes:
and the server mainboard cuts off a power supply path of the battery module after being electrified.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111004705.7A CN113708357A (en) | 2021-08-30 | 2021-08-30 | Power-on short-circuit protection circuit and method for server |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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