CN115356652B - Power failure detection and output control system - Google Patents
Power failure detection and output control system Download PDFInfo
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- CN115356652B CN115356652B CN202210985213.9A CN202210985213A CN115356652B CN 115356652 B CN115356652 B CN 115356652B CN 202210985213 A CN202210985213 A CN 202210985213A CN 115356652 B CN115356652 B CN 115356652B
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- 238000001514 detection method Methods 0.000 title claims abstract description 114
- 230000002159 abnormal effect Effects 0.000 claims abstract description 10
- 239000003990 capacitor Substances 0.000 claims description 71
- 230000003287 optical effect Effects 0.000 claims description 56
- 239000003381 stabilizer Substances 0.000 claims description 7
- 230000000087 stabilizing effect Effects 0.000 claims description 4
- 238000011084 recovery Methods 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 5
- 230000002427 irreversible effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 241000234276 Curculigo Species 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/40—Testing power supplies
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/36—Overload-protection arrangements or circuits for electric measuring instruments
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16533—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application
- G01R19/16538—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies
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Abstract
The invention discloses a power failure detection and output control system which comprises a voltage detection module, a state indication module, a failure processing module and an output enabling module. The voltage detection module comprises an overvoltage and undervoltage detection circuit which is arranged by a first reference chip and a second reference chip and is used for detecting the output voltage of the power supply module. The state indicating module is used for representing the detection result of the voltage detecting module; the fault processing module is used for keeping the output of the power supply system in a closed state until the fault is removed when the detection result of the voltage detection module is abnormal; the output enabling module is used for driving output enabling of the power supply system. The invention provides a power failure detection and output control system which is used for detecting the output of a power module and avoiding the damage of the power system and a later-stage circuit caused by automatic recovery output when the power system fails to recover, thereby improving the use reliability and safety of the power system.
Description
Technical Field
The invention relates to the technical field of circuit design, in particular to a power failure detection and output control system.
Background
The power supply is used as power supply equipment of all electronic products, and besides the basic electrical performance is required to meet the requirements of electric equipment, fault protection measures of the power supply are also very important. In general, faults of overvoltage, overcurrent and excessive temperature of components of a power supply output belong to hard faults in the power supply, namely, electronic parts have poor performance and are irreversible damage. Therefore, the power supply has to take protective measures to turn off the output in time, if the output of the power supply module is not turned off in time, the output voltage is too high or the current is too large, the electric equipment can be damaged in one step, for example, the electronic components can be broken down due to the fact that the voltage is too high, the electronic components can be damaged due to the fact that the current is too large, and even potential safety hazards such as smoke emission or open flame can be generated when the continuous voltage of the equipment is too high or the current is too large. In addition, the current high-power charger or the curculigo system requires parallel connection of multiple power supply modules, in the power supply system of multiple parallel power supply modules, when one of the power supply modules is damaged to generate an internal short circuit, since all the power supply modules are connected in parallel, the output of all the power supply modules is in a short circuit state, and the power supply modules are regarded as the whole power supply system to generate a short circuit fault, and as a result, the whole power supply system stops working.
The conventionally arranged fault protection such as overvoltage, overcurrent, overheat and the like is automatic recovery, namely, when the voltage is reduced, the current is reduced or the temperature is reduced along with the discharge of the energy storage device and the temporary stop of the power device, the output is recovered again. However, for the power module, the failure of the power module mostly belongs to irreversible hard failure, so that the power module or the electric equipment is secondarily damaged by the re-recovery output without failure removal, which is unfavorable for the reliable use of the power module and the power equipment.
Disclosure of Invention
The application provides a power failure detection and output control system which is used for detecting the output of a power module and avoiding the damage of the power system and a later-stage circuit caused by automatic recovery output when the power system fails to recover, thereby improving the use reliability and safety of the power system.
In a first aspect, the present application provides a power failure detection and output control system, including a voltage detection module, a status indication module, a failure processing module, and an output enabling module, specifically:
the voltage detection module is used for detecting the output voltage of the power supply module; the voltage detection module comprises an overvoltage and undervoltage detection circuit which is arranged by a first reference chip and a second reference chip;
the state indication module is used for representing the detection result of the voltage detection module;
The fault processing module is used for keeping the output of the power supply system in a closed state until the fault is removed when the detection result of the voltage detection module is abnormal;
the output enabling module is used for driving output enabling of the power supply system; the input end of the voltage detection module is connected with the output end of the power supply module, and the voltage detection module is sequentially connected with the state indication module, the fault processing module and the output enabling module.
The output of the power supply module is detected by a first reference chip and a second reference chip which are arranged in the voltage detection module to form an overvoltage and undervoltage detection circuit. And the output end of the voltage detection module is connected with the state indication module, and the voltage detection result of each power module in the power system is represented by the state indication module. Further, the state indicating module is connected with the fault processing module, and when the state indicating module displays that the detection result of the voltage detecting module is abnormal, the fault processing module keeps the output of the power supply system in a closed state until the fault is removed. When the fault is not recovered, the fault protection of the automatic recovery type is automatically started, and the power supply system and the subsequent circuit are more endangered. When the result of the power detection module is normal, the output enabling module drives the output enabling of each power module in the power system.
In one implementation manner, the power supply system at least includes two power supply modules, and an output end of each power supply module is connected with one voltage detection module, specifically:
The output end of each voltage detection module is connected in series; the output end of the voltage detection module corresponding to the last power module is connected with the state indication module.
In one implementation manner, the voltage detection module includes an overvoltage/undervoltage detection circuit set by a first reference chip and a second reference chip, and specifically includes:
the voltage detection module comprises a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, the first reference chip, the second reference chip and a first optical coupler;
The input end of the first resistor is connected with the output end of the power supply module, the first end of the second resistor, the first end of the third resistor, the first end of the fourth resistor, the first end of the fifth resistor and the first end of the sixth resistor;
The output end of the first resistor is connected with the first input end of the first optical coupler;
The second input end of the first optical coupler is connected with the second end of the second resistor and the negative electrode of the first reference chip;
the second end of the third resistor is connected with the first end of the seventh resistor, the second end of the fourth resistor, the first end of the eighth resistor and the reference electrode of the second reference chip;
The second end of the fifth resistor is connected with the negative electrode of the second reference chip, the first end of the ninth resistor, the second end of the sixth resistor, the first end of the tenth resistor and the reference electrode of the first reference chip;
The second end of the seventh resistor, the second end of the eighth resistor, the positive electrode of the second reference chip, the second end of the ninth resistor, the second end of the tenth resistor and the positive electrode of the first reference chip are grounded.
In one implementation manner, the status indication module includes a first capacitor to a ninth capacitor, an eleventh resistor to a twenty-second resistor, a first zener diode, a second zener diode, a first diode, a second diode, a first light emitting diode, a second light emitting diode, a first triode, a second triode, a third triode, and a voltage stabilizer, specifically:
The first end of the first capacitor is connected with the cathode of the first voltage stabilizing diode, the input end of the voltage stabilizer, the second end of the second capacitor, the second end of the thirteenth resistor, the second end of the fourteenth resistor and the second end of the third capacitor;
the positive electrode of the first voltage stabilizing diode is connected with the output end of the voltage stabilizer, the first end of the eleventh resistor, the first end of the twelfth resistor, the first end of the third capacitor and the first end of the fifteenth resistor;
the adjusting end of the voltage stabilizer is connected with the second end of the eleventh resistor, the second end of the twelfth resistor and the first end of the second capacitor;
The second end of the fifteenth resistor is connected with the collector electrode of the first triode, the first end of the fifth capacitor, the first end of the sixteenth resistor, the first end of the seventeenth resistor and the negative electrode of the first diode;
The second end of the sixteenth resistor is connected with the positive electrode of the first diode, the first end of the sixth capacitor, the first end of the seventh capacitor, the first end of the eighth capacitor and the negative electrode of the second zener diode;
The second end of the sixth capacitor is connected with the second end of the seventh capacitor and the second end of the eighth capacitor;
the second end of the seventeenth resistor is connected with the anode of the first light-emitting diode, the cathode of the second light-emitting diode and the TTL negative potential;
the base electrode of the first triode is connected with the second end of the eighteenth resistor;
the emitter of the first triode is connected with the second end of the fifth capacitor;
The first end of the eighteenth resistor is connected with the second end of the fourth capacitor and the first end of the twenty-first resistor;
The second end of the twenty-first resistor is connected with the base electrode of the second triode;
the collector electrode of the second triode is connected with the second end of the twentieth resistor and the anode of the second diode;
the first end of the twentieth resistor is connected with the first end of the nineteenth resistor and the +5V forward voltage end;
The second end of the nineteenth resistor is connected with the collector electrode of the third triode, the first end of the ninth capacitor and the first end of the twenty-second resistor;
The second end of the twenty-second resistor is connected with the negative electrode of the first light-emitting diode, the positive electrode of the second light-emitting diode and the TTL positive potential;
the negative electrode of the second triode is connected with the base electrode of the third triode;
And the emitter of the second triode is connected with the emitter of the third triode and the second end of the ninth capacitor.
In one implementation manner, the fault handling module includes twenty-third to twenty-eighth resistors, a tenth capacitor, a third zener diode, a fourth triode, a third diode, a first thyristor, a second optocoupler, and a third optocoupler, specifically:
A first end of the twenty-third resistor is connected with the first end of the sixteenth resistor and the negative electrode of the first diode;
The second end of the twenty-third resistor is connected with the first input end of the second optical coupler;
the second input end of the second optical coupler is connected with the first end of the twenty-fourth resistor and the collector electrode of the fourth triode;
The base electrode of the fourth triode is connected with the positive electrode of the second zener diode;
the first output end of the second optical coupler is connected with the first end of the twenty-fifth resistor;
The second end of the twenty-fifth resistor is connected with the negative electrode of the third diode, the first end of the twenty-sixth resistor and the first end of the twenty-eighth resistor;
The second end of the twenty-sixth resistor is connected with the first input end of the third optical coupler;
The second output end of the second optical coupler is connected with the first end of the tenth capacitor, the first end of the twenty-seventh resistor, the positive electrode of the third diode and the negative electrode of the third zener diode;
The emitter of the fourth triode is connected with the second end of the twenty-fourth resistor, the second end of the tenth capacitor, the second end of the twenty-seventh resistor, the second pin of the first thyristor and the second output end of the third optical coupler;
And the emitter of the fourth triode is also connected with the emitter of the second triode, the emitter of the third triode and the second end of the ninth capacitor.
The positive electrode of the third zener diode is connected with a third pin of the first thyristor;
The first pin of the first thyristor is connected with the second input end of the third optical coupler;
the first output end of the third optical coupler is connected with the second end of the twenty-eighth resistor.
In one implementation, the output enabling module includes the same number of optocouplers as the voltage detecting module, specifically:
the first input end of each optical coupler is connected with the second input end of the previous optical coupler;
A first input end of a first optical coupler in the output enabling module is connected with a second end of the twenty-eighth resistor;
And a second input end of the last optical coupler in the output enabling module is connected with an emitter of the fourth triode and a second pin of the first thyristor.
The first output end of each optical coupler in the output enabling module is an output enabling end, and the second output end is grounded.
In one implementation manner, a first output end of an optical coupler in a voltage detection module corresponding to a first power module in the power supply system is connected with the fault processing module through a twenty-ninth resistor;
A first output end of an optical coupler in a voltage detection module corresponding to a first power module in the power system is connected with the state indication module through the fourth capacitor;
And a second output end of the optical coupler in the last power module corresponding to the voltage detection module in the power system is connected with the state indication module.
Drawings
FIG. 1 is a block diagram of a power failure detection and output control system according to an embodiment of the present invention;
Fig. 2 is a schematic diagram of connection relation of a voltage detection module according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a connection relationship of a status indication module according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a connection relationship between a fault handling module according to an embodiment of the present invention;
Fig. 5 is a schematic diagram of a connection relationship of an output enabling module according to an embodiment of the present invention.
Detailed Description
The following describes in further detail the embodiments of the present invention with reference to the drawings and examples. The following examples are illustrative of the invention and are not intended to limit the scope of the invention.
The terms first and second and the like in the description and in the claims and in the drawings are used for distinguishing between different objects and not for describing a particular sequential order. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may include other steps or elements not listed or inherent to such process, method, article, or apparatus.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
Example 1
Referring to fig. 1, fig. 1 is a schematic diagram of a connection relationship between a power failure detection and an output control system according to an embodiment of the present invention. The embodiment of the invention provides a power failure detection and output control system, which comprises a voltage detection module 101, a state indication module 102, a failure processing module 103 and an output enabling module 104, and specifically comprises the following components:
The voltage detection module 101 is used for detecting the output voltage of the power supply module; wherein, the voltage detection module 101 comprises an overvoltage and undervoltage detection circuit which is arranged by a first reference chip and a second reference chip; the state indicating module 102 is used for representing the detection result of the voltage detecting module 101; the fault processing module 103 is configured to keep the output of the power supply system in a closed state until the fault is cleared when the detection result of the voltage detection module is abnormal; the output enabling module 104 is configured to drive output enabling of the power supply system; the input end of the voltage detection module is connected with the output end of the power supply module, and the voltage detection module is sequentially connected with the state indication module, the fault processing module and the output enabling module.
In the embodiment of the present invention, the power supply system at least includes two power supply modules, and the output end of each power supply module is connected to one voltage detection module 101, specifically: the output end of each voltage detection module is connected in series so as to realize the series connection of detection signals of the voltage detection modules. The output end of the voltage detection module corresponding to the last power module is connected with the status indication module 102. Because the output end of each voltage detection module is connected in series, when any power module in the power supply system is abnormal, the state indication module is only required to be connected with the output end of the voltage detection module corresponding to the last power module.
Referring to fig. 2, fig. 2 is a schematic diagram illustrating a connection relationship of a voltage detection module according to an embodiment of the present invention. In FIG. 2, a total of 4 voltage detection modules are included for detecting the +12V, -12V, +5.2V, and +3.2V power module outputs, respectively. Taking a voltage detection module corresponding to a +12v power module as an example, the voltage detection module includes: the first resistor R2, the second resistor R3, the third resistor R4, the fourth resistor R5, the fifth resistor R6, the sixth resistor R7, the seventh resistor R13, the eighth resistor R10, the ninth resistor R15, the tenth resistor R14, the first reference chip Q1, the second reference chip Q2, and the first optocoupler U1.
Specifically, the input end of the first resistor R2 is connected to the output end of the power module, the first end of the second resistor R3, the first end of the third resistor R4, the first end of the fourth resistor R5, the first end of the fifth resistor R6, and the first end of the sixth resistor R7; the output end of the first resistor R2 is connected with a first input pin of the first optical coupler U1; the second input pin of the first optical coupler U1 is connected with the second end of the second resistor R3 and the negative electrode of the first reference chip Q1; the second end of the third resistor R4 is connected with the first end of the seventh resistor R13, the second end of the fourth resistor R5, the first end of the eighth resistor R10 and the reference electrode of the second reference chip Q2; the second end of the fifth resistor R6 is connected with the negative electrode of the second reference chip Q2, the first end of the ninth resistor R15, the second end of the sixth resistor R7, the first end of the tenth resistor R14, and the reference electrode of the first reference chip Q1; the second end of the seventh resistor R13, the second end of the eighth resistor R10, the positive electrode of the second reference chip Q2, the second end of the ninth resistor R15, the second end of the tenth resistor R14, and the positive electrode of the first reference chip Q1 are grounded. Preferably, in the embodiment of the present invention, the first reference chip Q1 and the second reference chip Q2 are TL431, and the first reference chip Q1, the fifth resistor R6, the sixth resistor R7, the ninth resistor R15 and the tenth resistor R14 form an under-voltage circuit; the second reference chip Q2, the third resistor R4, the fourth resistor R5, the eighth resistor R10, and the seventh resistor R13 constitute an overvoltage circuit. And configuring an overvoltage point and an undervoltage point by adjusting resistance values of positive and negative ends of the first reference chip Q1 and the second reference chip Q2. In the embodiment of the invention, the overvoltage point is 15V, and the undervoltage point is 9.8V. When the output voltage of the power module is +12V, the voltage division of the positive electrode of the second reference chip Q2 is less than 2.5V, so the second reference chip is not conducted, and the voltage division of the positive electrode of the first reference chip Q1 reaches 2.5
V, the first optocoupler U1 is conducted, when the output voltage is higher than the overvoltage point voltage, the second reference chip Q2 is conducted, the first reference chip Q1 is not conducted, and at the moment, the first optocoupler is not conducted. Similarly, when the output voltage is lower than the undervoltage point voltage, the second reference chip Q2 is not turned on, the first reference chip is not turned on, and the first optocoupler is also not turned on.
The embodiment of the invention further comprises three voltage detection modules with the same structure for detecting the output of the power supply modules of-12V, +5.2V and +3.2V, and the structures of the other modules are not additionally described in detail for convenience and brevity of description. In the embodiment of the invention, the output end of each voltage detection module is connected in series, and specifically, the first output end of each optocoupler in the voltage detection module is connected with the second output end of the optocoupler in the previous voltage detection module. Preferably, the second output pin of the first optocoupler U1 is connected to the first output pin of the fourth optocoupler U3 in the next voltage detection module; the second output pin of the fourth optocoupler U3 is connected with the first output pin of the fifth optocoupler U5 in the next voltage detection module; the second output pin of the fifth optocoupler U5 is connected to the first output end of the sixth optocoupler U10 in the next voltage detection module until all the output ends of the optocouplers are connected in series. The first output pin of the first optocoupler U1 is connected to a first end of a twenty-ninth resistor R1.
Referring to fig. 3, fig. 3 is a schematic diagram of a connection relationship of a status indication module according to an embodiment of the present invention. The status indication module provided by the embodiment of the invention comprises a first capacitor, a ninth capacitor, an eleventh resistor, a twenty-second resistor, a first zener diode V3, a second zener diode V4, a first diode D5, a second diode D3, a first light emitting diode D1, a second light emitting diode D2, a first triode Q10, a second triode Q12, a third triode Q11 and a voltage regulator VR1.
The method comprises the following steps: the first end of the first capacitor C2 is connected to the negative electrode of the first zener diode V3, the input end 3 of the voltage regulator VR1, the second end of the second capacitor C96, the second end of the thirteenth resistor R45, the second end of the fourteenth resistor R82, and the second end of the third capacitor C3; the positive pole of the first zener diode V3 is connected to the output end 2 of the voltage regulator VR1, the first end of the eleventh resistor R40, the first end of the twelfth resistor R44, the first end of the third capacitor C3, and the first end of the fifteenth resistor R47; the adjustment terminal 1 of the voltage regulator VR1 is connected to the second terminal of the eleventh resistor R40, the second terminal of the twelfth resistor R44, and the first terminal of the second capacitor C96; the second end of the fifteenth resistor R47 is connected to the collector of the first triode Q10, the first end of the fifth capacitor C6, the first end of the sixteenth resistor R83, the first end of the seventeenth resistor R48 and the negative electrode of the first diode D5; the second end of the sixteenth resistor R83 is connected to the positive electrode of the first diode D5, the first end of the sixth capacitor C38, the first end of the seventh capacitor C17, the first end of the eighth capacitor C16 and the negative electrode of the second zener diode V4; a second end of the sixth capacitor C38 is connected to a second end of the seventh capacitor C17 and a second end of the eighth capacitor C16; the second end of the seventeenth resistor R48 is connected with the positive electrode of the first light emitting diode D1, the negative electrode of the second light emitting diode D2 and the TTL negative potential TTL; the base electrode of the first triode Q10 is connected with the second end of an eighteenth resistor R49; an emitter of the first triode Q10 is connected with the second end of the fifth capacitor C6; the first end of the eighteenth resistor R49 is connected with the second end of the fourth capacitor C5 and the first end of the twenty-first resistor R59; the second end of the twenty-first resistor R59 is connected with the base electrode of the second triode Q12; the collector of the second triode Q12 is connected with the second end of the twenty-first resistor R54 and the anode of the second diode D3; the first end of the twentieth resistor R54 is connected with the first end of the nineteenth resistor R51 and the +5V forward voltage end 5 VF; the second end of the nineteenth resistor R51 is connected to the collector of the third triode Q11, the first end of the ninth capacitor C7 and the first end of the twenty-second resistor R53; the second end of the twenty-second resistor R53 is connected with the negative electrode of the first light-emitting diode D1, the positive electrode of the second light-emitting diode D2 and the TTL positive potential TTL+; the negative electrode of the second triode Q12 is connected with the base electrode of the third triode Q11; an emitter of the second triode Q12 is connected to an emitter of the third triode Q11 and a second end of the ninth capacitor C7. In the embodiment of the invention, a first output end of an optical coupler in a voltage detection module corresponding to a first power module in the power system is connected with the state indication module through the fourth capacitor; and a second output end of the optical coupler in the last power module corresponding to the voltage detection module in the power system is connected with the state indication module. Preferably, the first output terminal of the first optocoupler U1 is connected to the first terminal of the fourth capacitor C5, and the second output terminal of the sixth optocoupler U10 is connected to the second terminal of the fourth capacitor C5, the first terminal of the eighteenth resistor, and the first terminal of the twenty-first resistor. When any one or more of the voltage detection modules is abnormal, the first triode Q10 is not conducted, and the voltage at the TTL negative potential TTL-is lifted to be high level by a signal provided by the +5V forward voltage terminal 5 VF. At this time, the second transistor Q12 is also non-conductive, and since the +5v positive voltage terminal 5VF provides a level signal, the third transistor Q11 is conductive, the voltage at the TTL positive potential ttl+ is pulled low to ground, and ttl+ is low to TTL-. The first light emitting diode D1 is turned on and the second light emitting diode is turned off. When the output ends of the voltage detection modules are all normal, the second triode Q12 is conducted, the third triode Q11 is not conducted, the voltage at the TTL positive potential TTL+ is +5V, the first triode Q10 is conducted, the voltage at the TTL negative potential TTL-is pulled down to be ground, and the TTL+ is high level. The first light emitting diode D1 is turned off and the second light emitting diode D2 is turned on. The first light-emitting diode D1 is set to be a red light, the second light-emitting diode D2 is set to be a green light, and when one or more paths of voltage detection modules are abnormal, indication is carried out through flashing of a traffic light.
Referring to fig. 4, fig. 4 is a schematic diagram of a connection relationship of a fault handling module according to an embodiment of the present invention. The embodiment of the invention provides a fault processing module, which comprises twenty-third to twenty-eighth resistors, a tenth capacitor C4, a third zener diode V2, a fourth triode Q8, a third diode V1, a first thyristor Q6, a second optocoupler U8 and a third optocoupler U6.
Specific: a first end of the twenty-third resistor R38 is connected to a first end of the sixteenth resistor R83 and the negative electrode of the first diode D5; a second end of the twenty-third resistor R38 is connected with the first input end of the second optical coupler U8; the second input end of the second optical coupler U8 is connected with the first end of a twenty-fourth resistor R91 and the collector electrode of the fourth triode Q8; the base electrode of the fourth triode Q8 is connected with the positive electrode of the second zener diode V4; the first output end of the second optical coupler U8 is connected with the first end of a twenty-fifth resistor R33; the second end of the twenty-fifth resistor R33 is connected with the negative electrode of the third diode V1, the first end of the twenty-sixth resistor R32 and the first end of the twenty-eighth resistor R29; a second end of the twenty-sixth resistor R32 is connected with the first input end of the third optical coupler U6; the second output end of the second optical coupler U8 is connected to the first end of the tenth capacitor C4, the first end of the twenty-seventh resistor R46, the positive electrode of the third diode V1, and the negative electrode of the third zener diode V2; the emitter of the fourth triode Q8 is connected with the second end of the twenty-fourth resistor R91, the second end of the tenth capacitor C4, the second end of the twenty-seventh resistor R46, the second pin 2 of the first thyristor Q6 and the second output end of the third optocoupler U6; the emitter of the fourth triode Q8 is further connected to the emitter of the second triode Q12, the emitter of the third triode Q11, and the second end of the ninth capacitor C7. The positive electrode of the third zener diode V2 is connected with the third pin 3 of the first thyristor Q6; the first pin 1 of the first thyristor Q6 is connected with the second input end of the third optocoupler U6; the first output terminal of the third optocoupler U6 is connected to the second terminal of the twenty-eighth resistor R29.
In the embodiment of the invention, a first output end of an optical coupler in a voltage detection module corresponding to a first power module in a power system is connected with the fault processing module through a twenty-ninth resistor. Preferably, the first output terminal of the first optocoupler U1 is connected to the first terminal of the twenty-ninth resistor R1, and the second terminal of the twenty-ninth resistor is connected to the first terminals of the twenty-fifth resistor R33, the third diode V1, the twenty-sixth resistor R32, and the twenty-eighth resistor R29. According to the analysis of the state indicating module, when the output of each voltage detecting module is normal, the TTL negative potential TTL-is low level, at the moment, the second optical coupler U8 is not conducted, the first thyristor Q6 and the third optical coupler U6 do not work, so that the enabling state of the power supply system is not changed, and signals are normally transmitted to the output enabling module. When the output of one or more voltage detection modules is abnormal, the TTL negative potential TTL-is high level, the second optocoupler U8 is conducted, the first thyristor Q6 and the third optocoupler U6 are also in a conducting state, and at the moment, the output enabling module cannot receive enough enabling driving signals to drive the power supply module, so that the power supply system cannot be enabled, the output is closed, and the power supply module is in a fault protection state. Since the first thyristor Q6 is turned on at this time, the fault protection state is maintained all the time, and after the power system is powered on again after the fault is removed, the first thyristor Q6 is turned off, so that the power system can output normally. The power supply system is prevented from being damaged more by the fact that the output is restored again when the fault is not removed, and the power supply system and the later-stage circuit are protected to a greater extent.
Referring to fig. 5, fig. 5 is a schematic diagram of a connection relationship of an output enabling module according to an embodiment of the present invention. The embodiment of the invention provides an output enabling module, which comprises the same number of optical couplers as voltage detection modules, and specifically: the first input end of each optical coupler is connected with the second input end of the previous optical coupler; a first input end of a first optical coupler in the output enabling module is connected with a second end of the twenty-eighth resistor R29; the second input end of the last optocoupler in the output enabling module is connected with the emitter of the fourth triode Q8 and the second pin 2 of the first thyristor Q6. The first output end of each optical coupler in the output enabling module is an output enabling end, and the second output end is grounded.
Preferably, an output enabling module provided in the embodiment of the present invention includes a seventh optocoupler U4, an eighth optocoupler U7, and a ninth optocoupler U9. And the first input end of the seventh optical coupler U4 is connected with the first end of the twenty-eighth resistor R29, and the connection with the fault processing module and the voltage detection module is realized through the twenty-eighth resistor R29. The first output end ctr+12.5 of the seventh optocoupler U4 is an output enable end corresponding to the 12V power module, the first output end ctr+5.2 of the eighth optocoupler U7 is an output enable end corresponding to the 5.2V power module, and the first output end ctr+3.4 of the ninth optocoupler U9 is an output enable end corresponding to the 3.4V power module. Because the voltage detection module of the-12V power supply module detects +12V voltage and the two power supply modules are both 12V output, the seventh optocoupler U4 is adopted to realize the output enabling control of the two 12V power supply modules.
The embodiment of the invention provides a power failure detection and output control system which comprises a voltage detection module, a state indication module, a failure processing module and an output enabling module. Specifically, the output of the power supply module is detected by a first reference chip and a second reference chip which are arranged in the voltage detection module to form an overvoltage and undervoltage detection circuit. And the output end of the voltage detection module is connected with the state indication module, and the voltage detection result of each power module in the power system is represented by the state indication module. Further, the state indicating module is connected with the fault processing module, and when the state indicating module displays that the detection result of the voltage detecting module is abnormal, the fault processing module keeps the output of the power supply system in a closed state until the fault is removed. When the fault is not recovered, the fault protection of the automatic recovery type is automatically started, and the power supply system and the subsequent circuit are more endangered. When the result of the power detection module is normal, the output enabling module drives the output enabling of each power module in the power system.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present invention, and these modifications and substitutions should also be considered as being within the scope of the present invention.
Claims (6)
1. The utility model provides a power failure detection and output control system which characterized in that includes voltage detection module, status indication module, fault handling module and output enabling module, specifically does:
the voltage detection module is used for detecting the output voltage of the power supply module; the voltage detection module comprises an overvoltage and undervoltage detection circuit which is arranged by a first reference chip and a second reference chip;
the voltage detection module comprises an overvoltage and undervoltage detection circuit which is arranged by a first reference chip and a second reference chip, and specifically comprises:
The voltage detection module comprises a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, the first reference chip, the second reference chip and a first optical coupler;
The input end of the first resistor is connected with the output end of the power supply module, the first end of the second resistor, the first end of the third resistor, the first end of the fourth resistor, the first end of the fifth resistor and the first end of the sixth resistor;
The output end of the first resistor is connected with the first input end of the first optical coupler;
The second input end of the first optical coupler is connected with the second end of the second resistor and the negative electrode of the first reference chip;
the second end of the third resistor is connected with the first end of the seventh resistor, the second end of the fourth resistor, the first end of the eighth resistor and the reference electrode of the second reference chip;
The second end of the fifth resistor is connected with the negative electrode of the second reference chip, the first end of the ninth resistor, the second end of the sixth resistor, the first end of the tenth resistor and the reference electrode of the first reference chip;
The second end of the seventh resistor, the second end of the eighth resistor, the positive electrode of the second reference chip, the second end of the ninth resistor, the second end of the tenth resistor and the positive electrode of the first reference chip are grounded; the first reference chip, the fifth resistor, the sixth resistor, the ninth resistor and the tenth resistor form an undervoltage circuit; the second reference chip, the third resistor, the fourth resistor, the eighth resistor and the seventh resistor form an overvoltage circuit; configuring an overvoltage point and an undervoltage point by adjusting resistance values of positive and negative ends of the first reference chip and the second reference chip;
the state indication module is used for representing the detection result of the voltage detection module;
The fault processing module is used for keeping the output of the power supply system in a closed state until the fault is removed when the detection result of the voltage detection module is abnormal;
the output enabling module is used for driving output enabling of the power supply system; the input end of the voltage detection module is connected with the output end of the power supply module, and the voltage detection module is sequentially connected with the state indication module, the fault processing module and the output enabling module.
2. The power failure detection and output control system according to claim 1, wherein the power system comprises at least two power modules, and an output terminal of each power module is connected to one of the voltage detection modules, specifically:
The output end of each voltage detection module is connected in series; the output end of the voltage detection module corresponding to the last power module is connected with the state indication module.
3. The power failure detection and output control system according to claim 1, wherein the status indication module comprises a first capacitor to a ninth capacitor, an eleventh resistor to a twenty-second resistor, a first zener diode, a second zener diode, a first diode, a second diode, a first light emitting diode, a second light emitting diode, a first triode, a second triode, a third triode, and a voltage regulator, and specifically:
The first end of the first capacitor is connected with the cathode of the first voltage stabilizing diode, the input end of the voltage stabilizer, the second end of the second capacitor, the second end of the thirteenth resistor, the second end of the fourteenth resistor and the second end of the third capacitor;
the positive electrode of the first voltage stabilizing diode is connected with the output end of the voltage stabilizer, the first end of the eleventh resistor, the first end of the twelfth resistor, the first end of the third capacitor and the first end of the fifteenth resistor;
the adjusting end of the voltage stabilizer is connected with the second end of the eleventh resistor, the second end of the twelfth resistor and the first end of the second capacitor;
The second end of the fifteenth resistor is connected with the collector electrode of the first triode, the first end of the fifth capacitor, the first end of the sixteenth resistor, the first end of the seventeenth resistor and the negative electrode of the first diode;
The second end of the sixteenth resistor is connected with the positive electrode of the first diode, the first end of the sixth capacitor, the first end of the seventh capacitor, the first end of the eighth capacitor and the negative electrode of the second zener diode;
The second end of the sixth capacitor is connected with the second end of the seventh capacitor and the second end of the eighth capacitor;
the second end of the seventeenth resistor is connected with the anode of the first light-emitting diode, the cathode of the second light-emitting diode and the TTL negative potential;
the base electrode of the first triode is connected with the second end of the eighteenth resistor;
the emitter of the first triode is connected with the second end of the fifth capacitor;
The first end of the eighteenth resistor is connected with the second end of the fourth capacitor and the first end of the twenty-first resistor;
The second end of the twenty-first resistor is connected with the base electrode of the second triode;
the collector electrode of the second triode is connected with the second end of the twentieth resistor and the anode of the second diode;
the first end of the twentieth resistor is connected with the first end of the nineteenth resistor and the +5V forward voltage end;
The second end of the nineteenth resistor is connected with the collector electrode of the third triode, the first end of the ninth capacitor and the first end of the twenty-second resistor;
The second end of the twenty-second resistor is connected with the negative electrode of the first light-emitting diode, the positive electrode of the second light-emitting diode and the TTL positive potential;
the negative electrode of the second triode is connected with the base electrode of the third triode;
And the emitter of the second triode is connected with the emitter of the third triode and the second end of the ninth capacitor.
4. The power failure detection and output control system according to claim 3, wherein the failure processing module comprises a twenty third resistor to a twenty eighth resistor, a tenth capacitor, a third zener diode, a fourth triode, a third diode, a first thyristor, a second optocoupler, and a third optocoupler, specifically:
A first end of the twenty-third resistor is connected with the first end of the sixteenth resistor and the negative electrode of the first diode;
The second end of the twenty-third resistor is connected with the first input end of the second optical coupler;
the second input end of the second optical coupler is connected with the first end of the twenty-fourth resistor and the collector electrode of the fourth triode;
The base electrode of the fourth triode is connected with the positive electrode of the second zener diode;
the first output end of the second optical coupler is connected with the first end of the twenty-fifth resistor;
The second end of the twenty-fifth resistor is connected with the negative electrode of the third diode, the first end of the twenty-sixth resistor and the first end of the twenty-eighth resistor;
The second end of the twenty-sixth resistor is connected with the first input end of the third optical coupler;
The second output end of the second optical coupler is connected with the first end of the tenth capacitor, the first end of the twenty-seventh resistor, the positive electrode of the third diode and the negative electrode of the third zener diode;
The emitter of the fourth triode is connected with the second end of the twenty-fourth resistor, the second end of the tenth capacitor, the second end of the twenty-seventh resistor, the second pin of the first thyristor and the second output end of the third optical coupler; the emitter of the fourth triode is also connected with the emitter of the second triode, the emitter of the third triode and the second end of the ninth capacitor;
the positive electrode of the third zener diode is connected with a third pin of the first thyristor;
The first pin of the first thyristor is connected with the second input end of the third optical coupler;
the first output end of the third optical coupler is connected with the second end of the twenty-eighth resistor.
5. The power failure detection and output control system of claim 4, wherein the output enabling module includes the same number of optocouplers as the voltage detection module, specifically:
the first input end of each optical coupler is connected with the second input end of the previous optical coupler;
A first input end of a first optical coupler in the output enabling module is connected with a second end of the twenty-eighth resistor;
The second input end of the last optical coupler in the output enabling module is connected with the emitter of the fourth triode and the second pin of the first thyristor;
the first output end of each optical coupler in the output enabling module is an output enabling end, and the second output end is grounded.
6. A power failure detection and output control system according to claim 3, wherein the voltage detection module is connected to the status indication module and the failure processing module in sequence, specifically:
A first output end of an optical coupler in a voltage detection module corresponding to a first power module in the power system is connected with the fault processing module through a twenty-ninth resistor;
A first output end of an optical coupler in a voltage detection module corresponding to a first power module in the power system is connected with the state indication module through the fourth capacitor;
And a second output end of the optical coupler in the last power module corresponding to the voltage detection module in the power system is connected with the state indication module.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105449641A (en) * | 2015-12-04 | 2016-03-30 | 中国船舶重工集团公司第七0九研究所 | Direct current power supply with multi-path fault cut-off type protection function |
| CN205229425U (en) * | 2015-12-10 | 2016-05-11 | 新誉轨道交通科技有限公司 | A cross under -voltage failure detector circuit for on -vehicle low pressure battery of electric automobile |
| CN207010210U (en) * | 2017-03-30 | 2018-02-13 | 深圳市海龙通科技有限公司 | A kind of fault detect and power protecting circuit |
| CN212085799U (en) * | 2020-02-29 | 2020-12-04 | 合肥华耀电子工业有限公司 | AC input over-voltage and under-voltage self-recovery protection circuit and state indication alarm function circuit |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11209494B2 (en) * | 2020-01-07 | 2021-12-28 | Hamilton Sundstrand Corporation | Fault monitoring systems for power supplies |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105449641A (en) * | 2015-12-04 | 2016-03-30 | 中国船舶重工集团公司第七0九研究所 | Direct current power supply with multi-path fault cut-off type protection function |
| CN205229425U (en) * | 2015-12-10 | 2016-05-11 | 新誉轨道交通科技有限公司 | A cross under -voltage failure detector circuit for on -vehicle low pressure battery of electric automobile |
| CN207010210U (en) * | 2017-03-30 | 2018-02-13 | 深圳市海龙通科技有限公司 | A kind of fault detect and power protecting circuit |
| CN212085799U (en) * | 2020-02-29 | 2020-12-04 | 合肥华耀电子工业有限公司 | AC input over-voltage and under-voltage self-recovery protection circuit and state indication alarm function circuit |
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