CN117435024B - Safe power supply control circuit of mainboard - Google Patents
Safe power supply control circuit of mainboard Download PDFInfo
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- CN117435024B CN117435024B CN202311744363.1A CN202311744363A CN117435024B CN 117435024 B CN117435024 B CN 117435024B CN 202311744363 A CN202311744363 A CN 202311744363A CN 117435024 B CN117435024 B CN 117435024B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/26—Power supply means, e.g. regulation thereof
- G06F1/30—Means for acting in the event of power-supply failure or interruption, e.g. power-supply fluctuations
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/26—Power supply means, e.g. regulation thereof
- G06F1/28—Supervision thereof, e.g. detecting power-supply failure by out of limits supervision
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Abstract
The invention discloses a safe power supply control circuit of a main board, which relates to the technical field of power supply control of the main board, and comprises a power supply control module, a power supply control module and a power supply control module, wherein the power supply control module is used for switching in alternating current electric energy, rectifying and filtering, isolating and stabilizing voltage and regulating and supplying electric energy; the power-down detection module is used for power-down detection; the intelligent control module is used for signal receiving and module control; the power switching module is used for carrying out power superposition with the power control module, switching the power transmission path and carrying out voltage reduction; the output processing module is used for outputting rectification, voltage detection and starting voltage holding processing; the main board module is used for being connected with the main board and outputting a starting signal when reaching a starting voltage; the bidirectional regulating module is used for bidirectional voltage regulating treatment; and the auxiliary electric energy module is used for storing and discharging energy. The safe power supply control circuit of the main board can improve the power-on rate, increase the applicable range of power supply, compensate electric energy, improve the power supply precision and maintain the power supply state when the power supply control module fails.
Description
Technical Field
The invention relates to the technical field of power supply control of a main board, in particular to a safe power supply control circuit of the main board.
Background
In a computer device, a power supply control circuit of a main board is the most critical part, the reliability of the power supply control circuit of the main board determines the performance and service life of the computer device, an existing power supply control circuit of the main board is mostly composed of a power supply adapter, the power supply adapter is composed of a switch power supply circuit, fixed voltage and current supply is realized to provide stable working electric energy, but due to different voltage and current supply requirements of different main boards, the applicable range of the power supply control circuit is smaller, the existing power supply control circuit cannot further perform electric energy adjustment, the power supply precision of a power supply is not high, and the fault risk of the whole computer device caused by power failure is increased due to single power supply, so that improvement is needed.
Disclosure of Invention
The embodiment of the invention provides a safe power supply control circuit of a main board, which aims to solve the problems in the background technology.
In order to achieve the above purpose, the present invention provides the following technical solutions:
a secure power control circuit for a motherboard, comprising: the system comprises a power supply control module, a power failure detection module, an electric energy switching module, an output processing module, a main board module, an intelligent control module, an auxiliary power supply module and a bidirectional regulation module;
the power supply control module is connected with the output processing module and used for accessing alternating current electric energy and rectifying and filtering the alternating current electric energy, detecting current and outputting a current signal, receiving a voltage signal fed back by the output processing module and carrying out isolation high-frequency voltage stabilizing adjustment processing on the rectified electric energy;
the power failure detection module is connected with the power control module and used for carrying out isolation power supply detection on the electric energy subjected to rectification and filtering treatment by the power control module and outputting a first detection signal, receiving a starting signal output by the main board module, carrying out logic treatment on the starting signal and the first detection control signal and outputting a first level signal;
the intelligent control module is connected with the power failure detection module, the bidirectional regulation module, the electric energy switching module, the main board module and the output processing module, is used for outputting a first pulse signal and a second pulse signal, controlling the voltage reduction work and the voltage increase work of the bidirectional regulation module, receiving a first control signal and controlling the electric energy receiving work of the electric energy switching module, receiving a starting signal output by the main board module, a voltage signal and a holding signal fed back by the output processing module, regulating the duty ratio of the first pulse signal and the second pulse signal, and controlling the output states of the first pulse signal and the second pulse signal according to the first level signal and the starting signal;
the electric energy switching module is connected with the power supply control module, the charging control module and the output processing module, and is used for transmitting the electric energy output by the power supply control module to the output processing module, performing superposition processing on the electric energy boosted by the bidirectional regulating module and the electric energy output by the power supply control module, receiving a first control signal, performing isolation-stopping rectification processing on the electric energy output by the power supply control module and transmitting the electric energy to the bidirectional regulating module;
the output processing module is used for rectifying and filtering the electric energy output by the electric energy switching module, detecting the voltage of the processed electric energy and outputting a voltage signal, carrying out reverse phase processing on a starting signal output by the main board module, carrying out holding processing on the voltage signal and outputting a holding signal;
the main board module is connected with the output processing module and used for receiving the electric energy output by the output processing module and is connected with the main board, and the main board module is used for outputting a starting signal when the main board reaches a starting voltage;
the bidirectional regulating module is connected with the auxiliary power supply module and is used for receiving the first pulse signal and carrying out step-down treatment on the electric energy output by the electric energy switching module, and is used for receiving the second pulse signal and carrying out step-up treatment on the electric energy output by the auxiliary power supply module;
and the auxiliary power supply module is used for storing the electric energy output by the bidirectional regulating module after the voltage is reduced and providing the electric energy for the bidirectional regulating module.
As still further aspects of the invention: the power supply control module comprises a power supply interface, a first rectifier, a first capacitor, a first resistor, a second capacitor, a first diode, a third power tube, a second resistor, a first transformer and a first driving device;
preferably, the first end of the power interface is connected with the first input end of the first rectifier, the second end of the power interface and the second input end of the first rectifier are grounded, the first output end of the first rectifier is connected with one end of the first capacitor, one end of the first resistor, one end of the second capacitor and the first end of the primary side of the first transformer, the other end of the first resistor and the other end of the second capacitor are both connected with the cathode of the first diode, the anode of the first diode is connected with the second end of the primary side of the first transformer and the drain electrode of the third power tube, the source electrode of the third power tube is connected with the current end of the first driving device and grounded through the second resistor, the other end of the first capacitor and the second output end of the first rectifier are both grounded, the gate electrode of the third power tube is connected with the output end of the first driving device, the voltage end of the first driving device is connected with the output processing module, and the first end and the second end of the secondary side of the first transformer are respectively connected with the electric energy switching module and the ground.
As still further aspects of the invention: the electric energy switching module comprises a second transformer, a first relay switch, a second relay switch, a first silicon controlled rectifier and a second silicon controlled rectifier; the intelligent control module comprises a first controller;
preferably, the first end of the primary side of the second transformer is connected with the first end of the secondary side of the first transformer, the second end of the primary side of the second transformer is connected with the output processing module, the first end of the secondary side of the second transformer is connected with the moving end of the first relay switch and the cathode of the first silicon controlled rectifier, the second end of the secondary side of the second transformer is connected with the anode of the second silicon controlled rectifier and the moving end of the second relay switch, the moving end of the first relay switch is connected with the cathode of the second silicon controlled rectifier, the anode of the first silicon controlled rectifier is connected with the moving end of the second relay switch, and the control ends of the first silicon controlled rectifier and the second silicon controlled rectifier are both connected with the IO3 end of the first controller.
As still further aspects of the invention: the electric energy switching module further comprises an eighth resistor, a first switching tube, a first relay and a second power supply;
preferably, the base electrode of the first switching tube is connected with the IO3 end of the first controller through an eighth resistor, the emitter electrode of the first switching tube is grounded, the collector electrode of the first switching tube is connected with one end of the first relay, and the other end of the first relay is connected with the second power supply.
As still further aspects of the invention: the output processing module comprises a second diode, a third resistor, a fourth resistor, a third capacitor, a first inverter and a sample hold device; the main board module comprises a main board interface;
preferably, the anode of the second diode is connected with the second end of the primary side of the second transformer, the cathode of the second diode is connected with the cathode of the third diode, one end of the third resistor, one end of the third capacitor and the power end of the main board interface, the anode of the third diode, the other end of the third capacitor and the grounding end of the main board interface are all connected with the second end of the secondary side of the first transformer, the other end of the third resistor is connected with the IO4 end of the first controller, the input end of the sample hold device and the voltage end of the first driving device and grounded through the fourth resistor, the starting end of the main board interface is connected with the input end of the first inverter and the IO6 end of the first controller, the output end of the first inverter is connected with the control end of the sample hold device, and the output end of the sample hold device is connected with the IO5 end of the first controller.
As still further aspects of the invention: the power failure detection module comprises a fifth resistor, a sixth resistor, a seventh resistor, a first power supply, a first optocoupler and a first logic chip;
preferably, the first end of the first optocoupler is connected with the first output end of the first rectifier through a fifth resistor, the second end of the first optocoupler is grounded, the third end of the first optocoupler is connected with one end of a seventh resistor and is connected with the first power supply through a sixth resistor, the fourth end of the first optocoupler is grounded, the other end of the seventh resistor is connected with the first end of the first logic chip, and the second end and the third end of the first logic chip are respectively connected with the starting end of the main board interface and the IO7 end of the first controller.
As still further aspects of the invention: the bidirectional regulating module comprises a fifth capacitor, a first power tube, a second power tube, a first inductor and a fourth capacitor; the auxiliary power supply module comprises an energy storage device;
preferably, one end of the fifth capacitor is connected with the drain electrode of the second power tube and the cathode of the second controllable silicon, the other end of the fifth capacitor is connected with the source electrode of the first power tube, one end of the fourth capacitor, one end of the energy storage device and the movable end of the second relay switch, the other end of the energy storage device is connected with the other end of the fourth capacitor and is connected with the source electrode of the second power tube and the drain electrode of the first power tube through the first inductor, and the grid electrode of the first power tube and the grid electrode of the second power tube are respectively connected with the IO1 end and the IO2 end of the first controller.
Compared with the prior art, the invention has the beneficial effects that: the safe power supply control circuit of the main board realizes the power supply to the main board module by the power supply control module matched with the output processing module, and the intelligent control module is used for switching the power transmission direction of the power switching module, and the two-way regulation module is matched for realizing the superposition power supply control and the voltage reduction power supply control to the power supply control module, so that the power-on rate is improved, the starting voltage requirement of the main board module is met when the voltage output by the power supply control module is too high or too low, the power supply application range of the power supply control circuit is increased, the compensation control can be continuously carried out on the power transmitted by the power supply control module after the main board module reaches the starting voltage and starts working, the power supply precision is improved, and the power supply can be continuously supplied to the main board module when the power supply control module fails, so that the power supply safety is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic block diagram of a safe power supply control circuit of a motherboard according to an embodiment of the present invention.
Fig. 2 is a circuit diagram of a safe power supply control circuit of a motherboard according to an embodiment of the present invention.
Fig. 3 is a connection circuit diagram of a power failure detection module according to an embodiment of the present invention.
Fig. 4 is a circuit diagram of a connection of an electrical energy switching module according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In one embodiment, referring to fig. 1, a secure power control circuit of a motherboard includes: the system comprises a power supply control module 1, a power failure detection module 2, an electric energy switching module 3, an output processing module 4, a main board module 5, an intelligent control module 6, an auxiliary power supply module 7 and a bidirectional regulating module 8;
specifically, the power supply control module 1 is connected with the output processing module 4, and is used for accessing alternating current electric energy and rectifying and filtering the alternating current electric energy, detecting current and outputting a current signal, receiving a voltage signal fed back by the output processing module 4, and isolating high-frequency voltage stabilizing and adjusting the rectified electric energy;
the power failure detection module 2 is connected with the power control module 1, and is used for carrying out isolation power supply detection on the electric energy subjected to rectification and filtering processing by the power control module 1 and outputting a first detection signal, receiving a starting signal output by the main board module 5, carrying out logic processing on the starting signal and the first detection control signal, and outputting a first level signal;
the intelligent control module 6 is connected with the power failure detection module 2, the bidirectional regulating module 8, the electric energy switching module 3, the main board module 5 and the output processing module 4, and is used for outputting a first pulse signal and a second pulse signal, controlling the voltage reduction work and the voltage boosting work of the bidirectional regulating module 8, receiving a first control signal and controlling the electric energy receiving work of the electric energy switching module 3, receiving a starting signal output by the main board module 5, a voltage signal and a holding signal fed back by the output processing module 4, regulating the duty ratio of the first pulse signal and the second pulse signal, and controlling the output states of the first pulse signal and the second pulse signal according to the first level signal and the starting signal;
the electric energy switching module 3 is connected with the power supply control module 1, the charging control module and the output processing module 4, and is used for transmitting the electric energy output by the power supply control module 1 to the output processing module 4, performing superposition processing on the electric energy boosted by the bidirectional regulating module 8 and the electric energy output by the power supply control module 1, receiving a first control signal, performing isolation rectification processing on the electric energy output by the power supply control module 1 and transmitting the electric energy to the bidirectional regulating module 8;
an output processing module 4 for performing rectifying and filtering processing on the electric energy output by the electric energy switching module 3, performing voltage detection on the processed electric energy, outputting a voltage signal, performing inverting processing on a start signal output by the main board module 5, performing holding processing on the voltage signal, and outputting a holding signal;
the main board module 5 is connected with the output processing module 4, and is used for receiving the electric energy output by the output processing module 4 and is connected with the main board, and is used for outputting a starting signal when the main board reaches a starting voltage;
the bidirectional regulating module 8 is connected with the auxiliary power supply module 7, and is used for receiving the first pulse signal and performing voltage reduction processing on the electric energy output by the electric energy switching module 3, and is used for receiving the second pulse signal and performing voltage boosting processing on the electric energy output by the auxiliary power supply module 7;
the auxiliary power module 7 is used for storing the electric energy output by the bidirectional regulating module 8 after the voltage is reduced and providing the electric energy for the bidirectional regulating module 8.
In a specific embodiment, the power control module 1 may adopt a power control circuit composed of a rectifier, a driving device, a power tube, a transformer, etc. to implement AC-DC and DC-DC processing on electric energy; the power-down detection module 2 can adopt a power-down detection circuit composed of a photoelectric coupler, a logic chip and the like, can perform isolation detection on electric energy output by the power control module 1, and performs logic calculation processing on a detected signal and a starting signal provided by the main board module 5 so as to judge whether the power control module 1 has a fault and power-down condition; the electric energy switching module 3 can adopt an electric energy switching circuit formed by a transformer, a silicon controlled rectifier, a relay and the like to switch an electric energy transmission path, so as to realize the electric energy superposition work of the power supply control module 1 and the voltage reduction control of the power supply control module 1; the output processing module 4 can adopt an output processing circuit composed of a diode, a capacitor, a resistor, a sample-hold device, an inverter and the like, can carry out rectifying and filtering processing on the input electric energy, and carries out voltage detection on the processed electric energy, and meanwhile, when the starting signal is output by the main board module 5, the sampled voltage signal is kept, so that the intelligent control module 6 can obtain the starting electric energy of the main board module 5; the main board module 5 can adopt a main board interface to be connected with a main board; the intelligent control module 6 can adopt an intelligent control circuit formed by a singlechip, integrates a plurality of components such as an arithmetic unit, a controller, a memory, an input/output unit and the like, realizes functions such as signal processing, data storage, module control, timing control and the like, and adjusts the electric energy transmitted by the electric energy switching module 3 according to the received starting electric energy; the auxiliary power module 7 can adopt an auxiliary power circuit formed by energy storage devices to realize the storage and release of electric energy; the bidirectional regulating module 8 can adopt a bidirectional regulating circuit consisting of a power tube, a capacitor, an inductor and the like to realize buck and boost operation.
In another embodiment, referring to fig. 1, 2, 3 and 4, the power control module 1 includes a power interface, a first rectifier T1, a first capacitor C1, a first resistor R1, a second capacitor C2, a first diode D1, a third power tube Q3, a second resistor R2, a first transformer B1 and a first driving device;
specifically, the first end of the power interface is connected to the first input end of the first rectifier T1, the second end of the power interface and the second input end of the first rectifier T1 are both grounded, the first output end of the first rectifier T1 is connected to one end of the first capacitor C1, one end of the first resistor R1, one end of the second capacitor C2 and the first end of the primary side of the first transformer B1, the other end of the first resistor R1 and the other end of the second capacitor C2 are both connected to the cathode of the first diode D1, the anode of the first diode D1 is connected to the second end of the primary side of the first transformer B1 and the drain of the third power tube Q3, the source of the third power tube Q3 is connected to the current end of the first driving device and is grounded through the second resistor R2, the other end of the first capacitor C1 and the second output end of the first rectifier T1 are both grounded, the gate of the third power tube Q3 is connected to the output end of the first driving device, the voltage end of the first driving device is connected to the output processing module 4, and the first end of the secondary side of the first transformer B1 and the first end of the second transformer B3 are connected to the power switch module.
In a specific embodiment, the first resistor R1, the second capacitor C2 and the first diode D1 absorb the peak voltage of the third power tube Q3, where the third power tube Q3 may be an N-channel field effect tube, and is driven by the output end of the first driver, and the transmission voltage of the first transformer B1 is adjusted by adjusting the conduction degree of the third power tube Q3, so as to implement high-frequency voltage stabilizing adjustment; the first transformer B1 may be a high-frequency transformer; the second resistor R2 is used for current sampling; the first driving device may be composed of a pulse width modulation chip and a voltage feedback device, wherein the voltage feedback device is composed of a PC817 photoelectric coupler, a voltage stabilizer TL431, and the like, and provides a voltage signal, and the selection of the pulse width modulation chip is not limited.
Further, the electric energy switching module 3 comprises a second transformer B2, a first relay switch K1-1, a second relay switch K1-2, a first silicon controlled rectifier SCR1 and a second silicon controlled rectifier SCR2; the intelligent control module 6 comprises a first controller U1;
specifically, a first end of a primary side of the second transformer B2 is connected to a first end of a secondary side of the first transformer B1, a second end of the primary side of the second transformer B2 is connected to the output processing module 4, a first end of the secondary side of the second transformer B2 is connected to a moving end of the first relay switch K1-1 and a cathode of the first silicon controlled rectifier SCR1, a second end of the secondary side of the second transformer B2 is connected to an anode of the second silicon controlled rectifier SCR2 and a non-moving end of the second relay switch K1-2, a non-moving end of the first relay switch K1-1 is connected to a cathode of the second silicon controlled rectifier SCR2, an anode of the first silicon controlled rectifier SCR1 is connected to a moving end of the second relay switch K1-2, and a control end of the first silicon controlled rectifier SCR1 and a control end of the second silicon controlled rectifier SCR2 are both connected to an IO3 end of the first controller U1.
In a specific embodiment, the first SCR1 and the second SCR2 may be unidirectional thyristors, and the electric energy transmitted by the second transformer B2 is rectified and transmitted to the bidirectional regulating module 8; the first relay switch K1-1 and the second relay switch K1-2 can be normally closed switches; the second transformer B2 can be a coupling transformer; the first controller U1 can be an STM32 singlechip.
Further, the electric energy switching module 3 further includes an eighth resistor R8, a first switching tube VT1, a first relay K1, and a second power source VCC2;
specifically, the base of the first switching tube VT1 is connected to the IO3 end of the first controller U1 through an eighth resistor R8, the emitter of the first switching tube VT1 is grounded, the collector of the first switching tube VT1 is connected to one end of the first relay K1, and the other end of the first relay K1 is connected to the second power VCC2.
In a specific embodiment, the first switching transistor VT1 may be an NPN transistor; the first relay K1 controls the on and off of the first relay switch K1-1 and the second relay switch K1-2 simultaneously in a magnetic attraction mode.
Further, the output processing module 4 includes a second diode D2, a third diode D3, a third resistor R3, a fourth resistor R4, a third capacitor C3, a first inverter J1, and a sample-and-hold device; the main board module 5 comprises a main board interface;
specifically, the anode of the second diode D2 is connected to the second end of the primary side of the second transformer B2, the cathode of the second diode D2 is connected to the cathode of the third diode D3, one end of the third resistor R3, one end of the third capacitor C3 and the power end of the main board interface, the anode of the third diode D3, the other end of the third capacitor C3 and the ground end of the main board interface are all connected to the second end of the secondary side of the first transformer B1, the other end of the third resistor R3 is connected to the IO4 end of the first controller U1, the input end of the sample-hold device and the voltage end of the first driving device and is grounded through the fourth resistor R4, the start end of the main board interface is connected to the input end of the first inverter J1 and the IO6 end of the first controller U1, the output end of the first inverter J1 is connected to the control end of the sample-hold device, and the output end of the sample-hold device is connected to the IO5 end of the first controller U1.
In a specific embodiment, the second diode D2 and the third diode D3 perform rectification processing; the third resistor R3 and the fourth resistor R4 perform voltage detection; the sample-hold device can be composed of an LF398 sample holder, a capacitor and the like, and is used for carrying out sample transmission processing on signals input by the input end when the control end of the sample-hold device is at a high level, and is used for carrying out holding processing on the signals transmitted by the sample when the control end of the sample-hold device is at a low level.
Further, the power failure detection module 2 includes a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, a first power VCC1, a first optocoupler U2, and a first logic chip J2;
specifically, a first end of the first optocoupler U2 is connected to a first output end of the first rectifier T1 through a fifth resistor R5, a second end of the first optocoupler U2 is grounded, a third end of the first optocoupler U2 is connected to one end of a seventh resistor R7 and is connected to the first power VCC1 through a sixth resistor R6, a fourth end of the first optocoupler U2 is grounded, another end of the seventh resistor R7 is connected to a first end of the first logic chip J2, and a second end and a third end of the first logic chip J2 are respectively connected to a start end of the motherboard interface and an IO7 end of the first controller U1.
In a specific embodiment, the first optocoupler U2 may be a PC817 optocoupler, and is matched with a fifth resistor R5, a sixth resistor R6, a first power VCC1, and a seventh resistor R7 to perform power supply detection; the first logic chip J2 may be an and gate logic chip, and determines whether the power control module 1 fails according to the transmission state of the first optocoupler U2 and the start signal output by the main board module 5.
Further, the bidirectional regulating module 8 includes a fifth capacitor C5, a first power tube Q1, a second power tube Q2, a first inductor L1, and a fourth capacitor C4; the auxiliary power module 7 comprises an energy storage device;
specifically, one end of the fifth capacitor C5 is connected to the drain of the second power tube Q2 and the cathode of the second thyristor SCR2, the other end of the fifth capacitor C5 is connected to the source of the first power tube Q1, one end of the fourth capacitor C4, one end of the energy storage device and the moving end of the second relay switch K1-2, the other end of the energy storage device is connected to the other end of the fourth capacitor C4 and to the source of the second power tube Q2 and the drain of the first power tube Q1 through the first inductor L1, and the gate of the first power tube Q1 and the gate of the second power tube Q2 are respectively connected to the IO1 end and the IO2 end of the first controller U1.
In a specific embodiment, the first power tube Q1 and the second power tube Q2 may be N-channel field effect tubes, where the second power tube Q2 performs voltage reduction control, and the first power tube Q1 performs voltage boosting control; the energy storage device can adopt a lithium battery.
In the safe power supply control circuit of the first motherboard of this embodiment, connect with the mains supply by the power interface, connect with AC electric energy, and carry on the rectification filter processing by first rectifier T1 and first electric capacity C1, according to the voltage signal that third resistance R3 and fourth resistance R4 detected and the current signal that the second resistance R2 detected by the first drive unit, regulate the conduction degree of the third power tube Q3, then regulate the electric energy that the first transformer B1 transmits, and transmit to the second diode D2 by the primary side of the second transformer B2, through the second diode D2, the third diode D3 and third electric capacity C3, finally transmit to the motherboard interface, supply power for motherboard interface connection, when the rate of electricity up to motherboard is needed to accelerate, the first controller U1 can control the conduction degree of the first power tube Q1, cooperate with the first inductance L1 and the second power tube Q2 to carry on the boost processing to the electric energy that the energy storage device releases, and transmit the electric energy after processing to the second transformer B2, and control the primary side of the second transformer B2 to transmit the electric energy that the second transformer B1 is overlapped with the first transformer B1, when the first transformer B1 is overlapped with the first transformer B1, the first transformer B1 is started up to the rate of electric energy is reached, the first transformer B1 is not being started up to the rate of the first transformer B1, the first transformer B1 is reached, the electric energy is not is reached to be turned on up to the first transformer B1, the first transformer is turned on when the first transformer B1 is turned on, the voltage is turned on, the first transformer B1 is turned on, and the voltage is turned on to be turned on to the voltage 1, the voltage is turned on to be turned on to the side 1, the voltage is turned on to the side, the first side is turned on, the voltage is 2 is turned on and the side is 2 and the side is turned on to the side and the side is and the side, the IO3 end of the first controller U1 controls the first switch tube VT1, the first silicon controlled rectifier SCR1 and the second silicon controlled rectifier SCR2 to be conducted, meanwhile, the IO2 end of the first controller U1 controls the conduction degree of the second power tube Q2, electric energy transmitted by the secondary side of the first transformer B1 is transmitted to the energy storage device through the second transformer B2 and the second power tube Q2 and stored, the secondary side voltage of the second transformer B2 is reduced, the primary side voltage of the second transformer B2 is also reduced, so that electric energy input to a main board interface is reduced, if the power control module 1 is not powered on and the main board interface has a starting signal output, the first optical coupler U2 and the first logic chip J2 can judge that the power control module 1 fails to power, and at the moment, the first controller U1 controls the first power tube Q1 to be conducted, and the energy storage device provides electric energy.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (3)
1. A safe power supply control circuit of a main board is characterized in that,
the safe power supply control circuit of the main board comprises: the system comprises a power supply control module, a power failure detection module, an electric energy switching module, an output processing module, a main board module, an intelligent control module, an auxiliary power supply module and a bidirectional regulation module;
the power supply control module is connected with the output processing module and is used for accessing alternating current electric energy and rectifying and filtering the alternating current electric energy, detecting current and outputting a current signal, receiving a voltage signal fed back by the output processing module and carrying out isolation high-frequency voltage stabilizing adjustment processing on the rectified electric energy;
the power failure detection module is connected with the power control module, and is used for carrying out isolation power supply detection on the electric energy subjected to rectification and filtering processing by the power control module and outputting a first detection signal, receiving a starting signal output by the main board module, carrying out logic processing on the starting signal and the first detection control signal and outputting a first level signal;
the intelligent control module is connected with the power failure detection module, the bidirectional regulating module, the electric energy switching module, the main board module and the output processing module, and is used for outputting a first pulse signal and a second pulse signal, controlling the voltage reduction work and the voltage increase work of the bidirectional regulating module, receiving a first control signal and controlling the electric energy receiving work of the electric energy switching module, receiving a starting signal output by the main board module, a voltage signal and a holding signal fed back by the output processing module, regulating the duty ratio of the first pulse signal and the second pulse signal, and controlling the output states of the first pulse signal and the second pulse signal according to the first level signal and the starting signal;
the electric energy switching module is connected with the power supply control module, the charging control module and the output processing module, and is used for transmitting the electric energy output by the power supply control module to the output processing module, superposing the electric energy boosted by the bidirectional regulating module and the electric energy output by the power supply control module, receiving a first control signal, performing isolation stopping rectification processing on the electric energy output by the power supply control module and transmitting the electric energy to the bidirectional regulating module;
the output processing module is used for rectifying and filtering the electric energy output by the electric energy switching module, detecting the voltage of the processed electric energy and outputting a voltage signal, carrying out reverse phase processing on a starting signal output by the main board module and carrying out holding processing on the voltage signal, and outputting a holding signal;
the main board module is connected with the output processing module, is used for receiving the electric energy output by the output processing module and is connected with the main board, and is used for outputting a starting signal when the main board reaches a starting voltage;
the bidirectional regulating module is connected with the auxiliary power supply module and is used for receiving the first pulse signal and carrying out step-down processing on the electric energy output by the electric energy switching module, and is used for receiving the second pulse signal and carrying out step-up processing on the electric energy output by the auxiliary power supply module;
the auxiliary power module is used for storing the electric energy output by the bidirectional regulating module after the voltage is reduced and providing the electric energy for the bidirectional regulating module;
the power supply control module comprises a power supply interface, a first rectifier, a first capacitor, a first resistor, a second capacitor, a first diode, a third power tube, a second resistor, a first transformer and a first driving device;
the first end of the power interface is connected with the first input end of the first rectifier, the second end of the power interface and the second input end of the first rectifier are grounded, the first output end of the first rectifier is connected with one end of the first capacitor, one end of the first resistor, one end of the second capacitor and the first end of the primary side of the first transformer, the other end of the first resistor and the other end of the second capacitor are both connected with the cathode of the first diode, the anode of the first diode is connected with the second end of the primary side of the first transformer and the drain electrode of the third power tube, the source electrode of the third power tube is connected with the current end of the first driving device and is grounded through the second resistor, the other end of the first capacitor and the second output end of the first rectifier are both grounded, the gate electrode of the third power tube is connected with the output end of the first driving device, the voltage end of the first driving device is connected with the output processing module, and the first end and the second end of the secondary side of the first transformer are respectively connected with the electric energy switching module and the ground;
the electric energy switching module comprises a second transformer, a first relay switch, a second relay switch, a first silicon controlled rectifier and a second silicon controlled rectifier; the intelligent control module comprises a first controller;
the first end of the primary side of the second transformer is connected with the first end of the secondary side of the first transformer, the second end of the primary side of the second transformer is connected with the output processing module, the first end of the secondary side of the second transformer is connected with the moving end of the first relay switch and the cathode of the first silicon controlled rectifier, the second end of the secondary side of the second transformer is connected with the anode of the second silicon controlled rectifier and the moving end of the second relay switch, the moving end of the first relay switch is connected with the cathode of the second silicon controlled rectifier, the anode of the first silicon controlled rectifier is connected with the moving end of the second relay switch, and the control ends of the first silicon controlled rectifier and the second silicon controlled rectifier are both connected with the IO3 end of the first controller;
the electric energy switching module further comprises an eighth resistor, a first switching tube, a first relay and a second power supply;
the base electrode of the first switching tube is connected with the IO3 end of the first controller through an eighth resistor, the emitter electrode of the first switching tube is grounded, the collector electrode of the first switching tube is connected with one end of the first relay, and the other end of the first relay is connected with the second power supply;
the output processing module comprises a second diode, a third resistor, a fourth resistor, a third capacitor, a first inverter and a sample hold device; the main board module comprises a main board interface;
the anode of the second diode is connected with the second end of the primary side of the second transformer, the cathode of the second diode is connected with the cathode of the third diode, one end of the third resistor, one end of the third capacitor and the power end of the main board interface, the anode of the third diode, the other end of the third capacitor and the grounding end of the main board interface are all connected with the second end of the secondary side of the first transformer, the other end of the third resistor is connected with the IO4 end of the first controller, the input end of the sample hold device and the voltage end of the first driving device and is grounded through the fourth resistor, the starting end of the main board interface is connected with the input end of the first inverter and the IO6 end of the first controller, the output end of the first inverter is connected with the control end of the sample hold device, and the output end of the sample hold device is connected with the IO5 end of the first controller.
2. The safe power supply control circuit of the main board according to claim 1, wherein the power failure detection module comprises a fifth resistor, a sixth resistor, a seventh resistor, a first power supply, a first optocoupler and a first logic chip;
the first end of the first optocoupler is connected with the first output end of the first rectifier through a fifth resistor, the second end of the first optocoupler is grounded, the third end of the first optocoupler is connected with one end of a seventh resistor and is connected with a first power supply through a sixth resistor, the fourth end of the first optocoupler is grounded, the other end of the seventh resistor is connected with the first end of the first logic chip, and the second end and the third end of the first logic chip are respectively connected with the starting end of the main board interface and the IO7 end of the first controller.
3. The safe power supply control circuit of claim 1, wherein the bidirectional regulating module comprises a fifth capacitor, a first power tube, a second power tube, a first inductor and a fourth capacitor; the auxiliary power supply module comprises an energy storage device;
one end of the fifth capacitor is connected with the drain electrode of the second power tube and the cathode of the second controllable silicon, the other end of the fifth capacitor is connected with the source electrode of the first power tube, one end of the fourth capacitor, one end of the energy storage device and the movable end of the second relay switch, the other end of the energy storage device is connected with the other end of the fourth capacitor and is connected with the source electrode of the second power tube and the drain electrode of the first power tube through the first inductor, and the grid electrode of the first power tube and the grid electrode of the second power tube are respectively connected with the IO1 end and the IO2 end of the first controller.
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| CN117935466B (en) * | 2024-03-21 | 2024-06-11 | 云南机电职业技术学院 | Multifunctional alarm control device for computer room |
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