CN105375615A - Fire-fighting host computer comprehensive power supply system equipped with main and standby power detecting circuit - Google Patents
Fire-fighting host computer comprehensive power supply system equipped with main and standby power detecting circuit Download PDFInfo
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- CN105375615A CN105375615A CN201510805731.8A CN201510805731A CN105375615A CN 105375615 A CN105375615 A CN 105375615A CN 201510805731 A CN201510805731 A CN 201510805731A CN 105375615 A CN105375615 A CN 105375615A
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Abstract
The invention discloses a fire-fighting host computer comprehensive power supply system equipped with a main and standby power detecting circuit. The fire-fighting host computer comprehensive power supply system comprises a switch power supply circuit for converting a mains supply voltage into a 13.6 V direct current for an output; the switch power supply circuit is connected to a voltage-reduction circuit for converting the 13.6 V direct current into 5 V direct current and a standby battery running control circuit; the standby battery running control circuit comprises a mains supply detecting circuit; the mains supply detecting circuit is connected to a voltage stabilizing circuit and a charging circuit; the charging circuit is connected to the 13.6 V direct current output end of a high-frequency transformer and a voltage comparison circuit; and the voltage comparison circuit is connected with the positive electrode end of the standby battery and a relay for controlling the operation of the relay. The fire-fighting host computer comprehensive power supply system is highly targeted, and can detect the problems of short circuit, open circuit, voltage shortage and the like of the standby battery through analogsignals; meanwhile, a hysteresis comparator is added for protecting the battery, so that the running stability of the fire-fighting system standby battery is improved; and in addition, the comprehensive power supply system can accurately output 13.6 V and 5 V direct current voltages for supplying power to various types of fire-fighting equipment.
Description
Technical field
The present invention relates to a kind of electric power system, especially a kind of comprehensive electric power system of fire-fighting main frame possessing active and standby power detection circuit.
Background technology
Fire-fighting power supply is applicable to when building breaking out of fire, it provides centrally connected power supply as escape lighting and other important one-level supply load, when electric main is normal, powered to important load through throwing device mutually by electric main, when after electric main power-off, throw device mutually by switching is to inverter power supply immediately, power-on time is determined by the capacity of storage battery, when line voltage recovers, emergency power supply will revert to mains-supplied.
But the electric power system of fire-fighting main frame is due to long-term operation; storage battery may be caused to occur the problems such as under-voltage, short circuit, open circuit; and the protection lacked battery; badly influence the safety of whole fire-fighting circuit, and the problem such as under-voltage, open circuit, short circuit not being specifically designed to storage battery in fire-fighting host supplying power system in the market carries out the circuit that detects.
And because fire-fighting main frame is connected with multiple fire-fighting control appliance, voltage needed for various control appliance is different often, and various circuit also easily produces electromagnetic interference, therefore need a set of combination property stronger and with the comprehensive electric power system of active and standby electro-detection function.
Summary of the invention
Object of the present invention is exactly to solve the above-mentioned problems in the prior art, provides a kind of comprehensive electric power system of fire-fighting main frame possessing active and standby power detection circuit.
Object of the present invention is achieved through the following technical solutions:
Possesses the comprehensive electric power system of fire-fighting main frame of active and standby power detection circuit, comprise Switching Power Supply power supply circuits line voltage being changed into the output of 13.6V direct current, described Switching Power Supply power supply circuits are connected to for 13.6V direct current being changed into the galvanic reduction voltage circuit of 5V and being used for the reserve battery running control circuit of detection control reserve battery running status, described reserve battery running control circuit comprises city's power detection circuit, described city power detection circuit is connected to voltage stabilizing circuit and charging circuit, described charging circuit is connected to 13.6V DC output end and the voltage comparator circuit of described high frequency transformer, described voltage comparator circuit connects the positive terminal of reserve battery and relay and controls its work.
Preferably, the described comprehensive electric power system of fire-fighting main frame possessing active and standby power detection circuit, wherein: described Switching Power Supply power supply circuits comprise mains connection, described mains connection connects electromagnetic interference filtering circuit, described electromagnetic interference filtering circuit connects overcurrent-overvoltage protecting circuit, described overcurrent-overvoltage protecting circuit is connected to full bridge rectifier, described full bridge rectifier is connected to discharge circuit by transient current absorbing circuit, pwm control circuit is connected to by bleeder circuit, described discharge circuit and pwm control circuit are connected to each other and are all connected to high frequency transformer, the high frequency low voltage alternating current that described high frequency transformer exports generates 13.6V low-voltage DC after half-wave rectifying circuit and LC filter circuit.
Preferably, the described comprehensive electric power system of fire-fighting main frame possessing active and standby power detection circuit, wherein: described electromagnetic interference filtering circuit comprises the voltage-stabiliser tube of thermistor and two differential concatenations.
Preferably, the described comprehensive electric power system of fire-fighting main frame possessing active and standby power detection circuit, wherein: described overcurrent-overvoltage protecting circuit comprises voltage-stabiliser tube in parallel and thermistor.
Preferably, the described comprehensive electric power system of fire-fighting main frame possessing active and standby power detection circuit, wherein: described reduction voltage circuit comprises sampling switch power control circuit, described sampling switch power control circuit is connected to the push-pull circuit and feedback circuit that are connected to each other, described push-pull circuit is connected to metal-oxide-semiconductor drive circuit, described metal-oxide-semiconductor drive circuit is connected to metal-oxide-semiconductor and feedback circuit, described metal-oxide-semiconductor connects described high frequency transformer and feedback circuit, described feedback circuit connects charge-discharge circuit, the 13.6V direct current step-down that described high frequency transformer inputs by described charge-discharge circuit is that 5V direct current exports.
Preferably, the described comprehensive electric power system of fire-fighting main frame possessing active and standby power detection circuit, wherein: described push-pull circuit comprises the first triode and second triode of emitter connection, the base stage of described first triode and the second triode is all connected to 6 pin of PWM chip in described sampling switch power control circuit by resistance, the collector electrode of described first triode connects 3 pin of described PWM chip, the collector electrode of described second triode connects 5 pin of described PWM chip, described first triode and the alternation under the control of described PWM chip of described second triode.
Preferably, the described comprehensive electric power system of fire-fighting main frame possessing active and standby power detection circuit, wherein: described charging circuit comprises the drive circuit and timer pulse modulation circuit that are connected to each other, described drive circuit and timer pulse modulation circuit are all connected to the 13.6V DC output end of described city power detection circuit and high frequency transformer, and described timer pulse modulation circuit is connected to described voltage comparator circuit.
Preferably, the described comprehensive electric power system of fire-fighting main frame possessing active and standby power detection circuit, wherein: described voltage comparator circuit comprises the cathode voltage generative circuit, cathode voltage generative circuit and the hysteresis comparator that are connected to each other, and described cathode voltage generative circuit and cathode voltage generative circuit all connect the positive terminal of reserve battery.
The advantage of technical solution of the present invention is mainly reflected in:
1. deft design of the present invention, with strong points, by the short circuit of analog signal detection reserve battery, open circuit and the problem such as under-voltage, thus can process existing problems in time, reduces the possibility of risk generation; Meanwhile, adding hysteresis comparator has protective effect to battery, improves the stability that fire-fighting system reserve battery runs, ensure that effective operation of whole fire-fighting system, improve fail safe; And output 13.6V that can be accurate, stable and 5V direct voltage are various fire-fighting equipment powers.
2. by the Real-Time Monitoring to voltage and current in circuit, rising sharply of voltage or electric current can be known in time, and when overtension, clamper carried out to voltage or when electric current is too high, current limliting carried out to electric current, make it be no more than ceiling voltage that circuit can bear or electric current, thus efficiently solve the problem of the over-current over-voltage protection for switching power circuit; Meanwhile, effectively can be filtered out the electromagnetic interference signal of common mode by common mode inductance, ensure the stability that each several part runs.
3. the present invention adopts high frequency transformer, and the volume of whole electric power system is little.
4. effectively can be improved the operating efficiency of reduction voltage circuit by push-pull circuit, reduce the loss of circuit, there is low noise, low power capabilities.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is circuit structure diagram of the present invention.
Embodiment
Object of the present invention, advantage and disadvantage, by for illustration and explanation for the non-limitative illustration passing through preferred embodiment below.These embodiments are only the prominent examples of application technical solution of the present invention, allly take equivalent replacement or equivalent transformation and the technical scheme that formed, all drop within the scope of protection of present invention.
The comprehensive electric power system of fire-fighting main frame possessing active and standby power detection circuit that the present invention discloses; as shown in accompanying drawing 1-accompanying drawing 2; it comprises the Switching Power Supply power supply circuits 50 line voltage being changed into the output of 13.6V direct current; described Switching Power Supply power supply circuits 50 comprise mains connection; described mains connection connects electromagnetic interference filtering circuit 1; described electromagnetic interference filtering circuit 1 connects overcurrent-overvoltage protecting circuit 2, and described overcurrent-overvoltage protecting circuit 2 is connected to full bridge rectifier 3.
Concrete, the live wire end of described city electric connection terminal connects an interrupteur SW 1, described interrupteur SW 1 is connected a fuse F1, described fuse connects the different name end of described first common mode inductance LF2 first winding, the Same Name of Ends of described first common mode inductance LF2 first winding is connected to resistance R32 in parallel, electric capacity CY4, electric capacity CX1, the Same Name of Ends of first cathode terminal of the voltage-stabiliser tube Z1 of two differential concatenations and first winding of the second common mode inductance LF1, one end of the other end contact resistance R40 of described resistance R32, another termination FG of described electric capacity CY4 holds and passes through electric capacity CY3 ground connection, the other end of described electric capacity CX1 connects electric capacity CY5, described electric capacity CY5 connects FG end and electric capacity CY3.
The different name end of described first common mode inductance LF2 second winding connects the zero line N of described city electric connection terminal, and the Same Name of Ends of described first common mode inductance LF2 second winding is connected to one end of resistance R40, the electric capacity CX1 other end and thermistor RTH1.
First cathode terminal of the voltage-stabiliser tube Z1 of described two differential concatenations is connected to the Same Name of Ends of first winding of the second common mode inductance LF1, and second cathode terminal of the voltage-stabiliser tube Z1 of described two differential concatenations is connected to the Same Name of Ends of second winding of described second common mode inductance LF1 and the other end of described thermistor RTH1; The other end of described thermistor RTH1 is also connected to the Same Name of Ends of second winding of described second common mode inductance LF1.
The voltage-stabiliser tube Z1 of described thermistor RTH1 and two differential concatenation forms described overcurrent-overvoltage protecting circuit, and when the power supply overcurrent of described external power source, described thermistor RTH1, to increase the mode of direct impedance, carries out current limliting process to supply current; The voltage-stabiliser tube Z1 of described two differential concatenations, to reduce the mode of direct impedance, carries out clamper process to voltage, by the voltage clamp of output in safety value.
The different name end of described second common mode inductance LF1 first winding connects the negative electrode of the first diode and the anode of the 3rd diode, the anode of described first diode is connected to the anode of the second diode, the negative electrode of described second diode connects the described different name end of the second common mode inductance second winding and the anode of the 4th diode, the negative electrode of described 4th diode is connected to the negative electrode of described 3rd diode, thus form full bridge rectifier 3, change alternating current into direct current.
The direct current of described full bridge rectifier 3 export through parallel connection in circuit and connect the polar capacitor EC1 of HV+ end level and smooth after, be connected to discharge circuit 4 by transient current absorbing circuit, described discharge circuit 4 is connected to high frequency transformer T1.
Concrete, described full bridge rectifier 3 is connected to the anode of voltage-stabiliser tube ZD1 and 1 pin of high frequency transformer, described voltage-stabiliser tube ZD1 is for absorbing the instantaneous large-current caused described in transient high voltage pulse, its anode is also connected to 1 pin of described high frequency transformer T1 former limit winding, the negative terminal of described voltage-stabiliser tube ZD1 is connected to the negative electrode of a sustained diode 1, the anode of described sustained diode 1 is connected to 2 pin of described high frequency transformer T1 former limit winding, the high electromotive force that described sustained diode 1 is convenient to described high frequency transformer T1 is produced consumes in afterflow mode in the loop, thus protective circuit element is not damaged, and be also parallel with electric capacity C5, resistance R15, R11 of series connection and resistance R52, R51 of series connection between described voltage-stabiliser tube ZD1 and high frequency transformer former limit winding, the described sustained diode 1 of place in circuit in parallel and four resistance R15, R11, R52, R51 are configured for the discharge circuit 4 that described high frequency transformer T1 discharges, 1 pin of described high frequency transformer T1 former limit winding is also connected to electric capacity CY2, described resistance CY2 ground connection.
Described full bridge rectifier 3 also connects pwm control circuit 5 by bleeder circuit, and described pwm control circuit 5 is for providing drive singal, over-voltage over-current protection, pulse width control and driving connected high frequency transformer T1.
Concrete, described full bridge rectifier 3 is connected to 8 pin of power supply chip U1 by the bleeder circuit that resistance R3, R7 of series connection are formed, 5 pin of described power supply chip U1 are connected to the grid of mos pipe Q1 by discharge diode D3 in parallel and divider resistance R8, the drain electrode of described mos pipe Q1 is connected to 2 pin of described high frequency transformer T1 former limit winding and the anode of described fly-wheel diode, one end of source electrode contact resistance R9, R6, R68 of described mos pipe Q1, the other end of described resistance R9 is connected to 3 pin of described power supply chip U1; The other end of described resistance R6 is connected to the negative electrode of described diode D3, the grid of resistance R8 and described mos pipe Q1; The other end of described resistance R69 is connected to overload protection feedback circuit 10; described overload protection feedback circuit 10 is connected to 6 pin that winding assisted by 2 pin of described power supply chip U1 and described high frequency transformer; it feeds back current voltage value; and compare with 13.6V, thus control the operating state of described high frequency transformer T1.
Concrete, described overload protection feedback circuit 10 comprises one end and connects the electric capacity CY1 that winding 6 pin assisted by described high frequency transformer, the other end of described electric capacity CY1 connects ground and one end of contact resistance C9 and 1 pin of source of stable pressure Q8, 3 pin of described source of stable pressure Q8 connect the other end of described resistance C9 and one end of resistance R18 and electric capacity C11, another termination C of described resistance R18 holds, one end of the other end connecting resistance R21 of described electric capacity C11, the other end of described resistance R21 connects 2 pin of described source of stable pressure Q8 and comprises the optocoupler U2 of the first light-emitting diode and the first photosensitive triode and one end of resistance R20, the other end of described resistance R20 connects the negative electrode of described first light-emitting diode and one end of described resistance R19, the other end of described resistance R19 exports 13.6V voltage, the emitter of described first photosensitive triode and collector electrode connect overcurrent protection feedback circuit 20.
Described high frequency transformer assists 5 pin of winding to be connected to described overcurrent protection feedback circuit 20 by resistance R16, and described overcurrent protection feedback circuit 20 is connected to 1 pin of described power supply chip U1,2 pin, 4 pin and 6 pin.
Concrete, the negative electrode of connection diode D2 and D11 of described resistance R16, the anode of described diode D12 connects electric capacity C6, one end of polar capacitor EC2 and 6 pin of described power supply chip U1, and the other end of described electric capacity C6, polar capacitor EC2 is all connected to one end of 4 pin of power supply chip U1 and electric capacity C22, resistance R12, electric capacity C7.
The other end of described electric capacity C22 connects the anode of described diode D11, P-VCC end, the other end of resistance R69, the emitter of described first phototriode and one end of electric capacity C8, the collector electrode of the first phototriode described in another termination of described electric capacity C8 and 2 pin of described power supply chip U1.
The other end of described resistance R12 connects 1 pin of described power supply chip U1, and the other end of described electric capacity C7 connects 3 pin of described power supply chip U1 and described resistance R9.
Described resistance R69 is current sampling resistor, when electric current flows through it, and the required electric current of 3 feel of described power supply chip U1, and control metal-oxide-semiconductor disconnection, now described overload protection feedback circuit 10 does not work.
7 pin of described power supply chip U1 do not use.
The voltage that described high frequency transformer T1 exports generates 13.6V voltage after half-wave rectifying circuit 7 and LC filter circuit 8, described half-wave rectifying circuit 7 utilizes rectifier diode PN junction unilateral conduction that alternating current is become pulsating direct current, and described LC filter circuit 8 utilizes inductance to lead to low frequency resistance high frequency, electric capacity, every the principle of straight-through friendship, the direct current with many interference signals is transformed into purer direct current.
Concrete, 3 pin of described high frequency transformer T1 vice-side winding connect the negative electrode of diode Q3, the anode of described diode Q3 is connected to one end of polar capacitor EC4, EC6 in parallel and one end of inductance L 3, and the other end of described inductance L 3 connects polar capacitor EC5, resistance R10 in parallel, one end of electric capacity C2 and polar capacitor EC10.
4 pin of described high frequency transformer T1 vice-side winding connect the other end of polar capacitor EC4, EC6 in parallel, polar capacitor EC5, resistance R10, electric capacity C2 and polar capacitor EC10.
Described Switching Power Supply power supply circuits 50 are connected to for 13.6V direct current being changed into the galvanic reduction voltage circuit 30 of 5V.
As shown in accompanying drawing 1-accompanying drawing 2, described reduction voltage circuit 30 comprises sampling switch power control circuit 11, described sampling switch power control circuit 11 is connected to push-pull circuit 12 and feedback circuit 14, described push-pull circuit 12 is connected to described feedback circuit 14 and metal-oxide-semiconductor drive circuit 13, described metal-oxide-semiconductor drive circuit 13 is connected to metal-oxide-semiconductor Q2 and feedback circuit, high frequency transformer T1 in described metal-oxide-semiconductor Q2 connecting valve power supply and feedback circuit 14, described feedback circuit 14 connects charge-discharge circuit 60, the 13.6V direct current step-down that described high frequency transformer T1 inputs by described charge-discharge circuit 60 is that 5V direct current exports.
Concrete, described sampling switch power control circuit 11 comprises PWM chip U3, 1 pin of described PWM chip U3 is connected to resistance R38 in parallel and electric capacity C19, described resistance R38 and electric capacity C19 is all connected to 2 pin of described PWM chip and one end of a resistance R39, the other end of described resistance R39 is connected to an electric capacity C14, one end of resistance R25 and resistance R31, the other end of described electric capacity C14 is connected to one end of a resistance R26, described resistance R26 and their other end in parallel with described resistance R25 is all connected to one end of resistance R62, the negative electrode of the other end connecting luminous diode D8 of described resistance R62, the plus earth of described light-emitting diode D8, described resistance R31 ground connection.
4 pin of described PWM chip U3 connect the base stage of the 4th triode Q17, one end of resistance R30 and electric capacity C16,8 pin of described PWM chip connect one end of the described collector electrode of the 4th triode Q17, the other end of resistance R30 and electric capacity C21, the other end of described electric capacity C21 is connected with the other end of described electric capacity C16, and their node connects electric capacity C15 in parallel and polar capacitor EC23, and described electric capacity C15 and polar capacitor EC23 is all connected to 7 pin of described PWM chip U3; The emitter of described 4th triode Q17 is connected to one end of resistance R53, and the other end of described resistance R53 is connected to 3 pin of described PWM chip U3.
Described PWM chip U3 is also connected to the push-pull circuit 12 comprising the first triode Q9 and the second triode Q10, concrete, and 6 pin of described PWM chip U3 are connected to the base stage of the first triode Q9 and the second triode Q10; The collector electrode of described first triode Q9 is connected to 7 pin of described PWM chip U3, described polar capacitor EC3, electric capacity C15 and resistance R35; The emitter of described first triode Q9 is connected to the emitter of described second triode Q10, and one end of their common contact resistance R27, the other end of described resistance R27 connects one end of electric capacity C12, and the other end of described electric capacity C12 is connected to the different name end of common mode inductance L1 first winding.
5 pin of described PWM chip connect the collector electrode of described second triode Q10 and the Same Name of Ends of described common mode inductance L1 first winding; The Same Name of Ends of described common mode inductance L1 second winding connects the collector electrode of the 3rd triode Q7, the different name end of described common mode inductance L1 second winding is connected to the described base stage of the 3rd triode Q7 and the negative electrode of diode D4 by an electric capacity C10, and the negative electrode of described diode D4 connects the base stage of described 3rd triode Q7.
The emitter of described 3rd triode Q7 is connected to the anode of described diode D4 and one end of resistance R13, and the other end of described resistance R13 is connected to the grid of metal-oxide-semiconductor Q2; The collector electrode of described 3rd triode Q7 is also connected to one end of resistance R14 and the source electrode of metal-oxide-semiconductor Q2, and the other end of described resistance R14 is connected to the other end of described resistance R13; The drain electrode of described metal-oxide-semiconductor Q2 is connected to the vice-side winding of high frequency transformer, and is also parallel with inductive capacitance EC7 and electric capacity C3 between which, thus forms metal-oxide-semiconductor drive circuit 13.
The emitter of described 3rd triode Q7 and the source electrode of described metal-oxide-semiconductor Q2 are all connected to the different name end of common mode inductance T2 first winding, the Same Name of Ends of described common mode inductance T2 first winding is connected to the anode of inductance L 2 and diode Q6, polar capacitor EC8, EC9 is also parallel with between the negative electrode of described inductance L 2 and diode Q6, their common nodes are connected to resistance R17 in parallel and electric capacity C4, described resistance R17 and electric capacity C4 are connected the negative electrode of described light-emitting diode D8 by described resistance R62, thus form described charge-discharge circuit 60.
The different name end of described common mode inductance T2 second winding is connected to the Same Name of Ends of described first common mode inductance L1 first winding, the collector electrode of the second diode Q10,5 pin of described PWM chip U3 and earth terminal; The Same Name of Ends of described common mode inductance T2 second winding is connected to the negative electrode of diode D6, one end of the anode contact resistance R37 of described diode D6, the other end of described resistance R37 is connected to 3 pin of described PWM chip U3, between the Same Name of Ends and different name end of described common mode inductance T2 second winding, be also parallel with resistance R54, R36 and electric capacity C17, thus form feedback circuit 14.
Described Switching Power Supply power supply circuits 50 are also connected to the reserve battery running control circuit 40 for controlling to detect reserve battery running status.
Described reserve battery running control circuit 40 comprises city's power detection circuit 15, described city power detection circuit 15, comprise the resistance R22 being connected to civil power, described resistance is connected to the negative electrode of light-emitting diode, described light-emitting diode and phototriode form the first optocoupler U4, the emitter of described phototriode connects SGND end, and its collector electrode connects ZDSINGAL end; The anode of the light-emitting diode in described first optocoupler U4 is connected to the negative electrode of the second light-emitting diode, described second light-emitting diode and the second phototriode form the second optocoupler U6, the anode of described second light-emitting diode is connected to 2 pin of precision voltage regulator Q11, thus provides a reference voltage.
Described city power detection circuit 15 is connected to voltage stabilizing circuit 16, concrete, the anode of described second light-emitting diode connects one end of electric capacity C13, the other end contact resistance R28 of described electric capacity C13, one end of R33 and 3 pin of described precision voltage regulator Q11, one end of the other end contact resistance R23 of described resistance R28, one end of the other end contact resistance R64 of described resistance R23 and HV+ end, the negative electrode of the other end connecting luminous diode D12 of described resistance R64, described light-emitting diode D12 is used as the display lamp of front level power supply, one end of its anode contact resistance R63, the other end ground connection of described resistance R63 also connects the other end of described resistance R33 and 1 pin of described precision voltage regulator Q11, the other end ground connection of described resistance R33 is also connected to 1 pin of described precision voltage regulator Q11.
Described city power detection circuit 15 is also connected to charging circuit 17, concrete, as shown in accompanying drawing 1-accompanying drawing 2, the emitter of described second phototriode connects 4 pin of timer U8 in described charging circuit 17, and the collector electrode of described second phototriode is connected to the output of Switching Power Supply medium/high frequency transformer and 8 pin of described timer U8.
The collector electrode of described second phototriode is also connected with anode and the resistance R71 of diode Q5, one end of R45, the negative electrode of described diode Q5 is connected to the collector electrode of A end and triode Q4, the emitter of described triode Q4 connects the other end of described resistance R71, the base stage of described triode Q4 connects the other end of described resistance R45 and one end of resistance R46, the other end of described resistance R46 is connected to the collector electrode of triode Q13, the base stage contact resistance R44 of described triode Q13, one end of R50, the other end of described resistance R44 connects the emitter of described triode Q13 and ground connection, thus formation drive circuit.
Described drive circuit is connected to timer pulse modulation circuit, and the concrete anode of described diode Q5 and one end of resistance R71, R45 are connected to 4 pin of described timer U8, and the other end of described resistance R50 is connected to 3 pin of described timer U8.
7 pin of described timer U8 are connected to the negative electrode of diode D9 and one end of resistance R55, R47; The anode of described diode D9 is connected to the negative electrode of 6 pin of described timer U8,2 pin and diode D10; The other end of described resistance R55 connects the anode of described diode D10; The other end of described resistance R47 is connected to the output of described Switching Power Supply medium/high frequency transformer, the output of described high frequency transformer exports 13.6V direct current, it goes back one end of contact resistance R34, the other end of described resistance R34 connects the negative electrode of diode D15 and one end of resistance R41, and the anode of described diode D15 connects B end; The other end of described resistance R41 connects the 3rd optocoupler U5 comprising the 3rd light-emitting diode and the 3rd phototriode, and the collector electrode of described 3rd phototriode connects SHORTSIGNAL end, and the emitter of described 3rd bright triode connects SGND end; 2 pin of described timer U8 also connect one end of electric capacity C18, and 5 pin of described timer U8 connect electric capacity C20 one end, and the other end of described electric capacity C18, C20 connects and is jointly connected to 1 pin of described timer U8, thus forms timer pulse modulation circuit.
Described charging circuit 17 is connected to voltage comparator circuit 18, described voltage comparator circuit 18 comprises the cathode voltage generative circuit 19, cathode voltage generative circuit 21 and the hysteresis comparator U9 that are connected to each other, and described cathode voltage generative circuit 19 and cathode voltage generative circuit 21 all connect the positive terminal BT+ of reserve battery.
Concrete, 1 pin of described timer U8 also connects the 4th optocoupler U7 comprising the 4th light-emitting diode and the 4th phototriode, and the emitter connection SGND of described 4th phototriode is short, and its collector electrode connects FDOPENSIGNAL end.
The negative electrode of described 4th light-emitting diode is connected to one end of resistance R43, the other end of described resistance R43 connects the negative electrode of voltage stabilizing didoe D5, the anode of described voltage stabilizing didoe D5 connects described cathode voltage generative circuit 19, concrete, the anode of described voltage stabilizing didoe D5 is connected to the negative electrode of B end, fuse F2 and diode D17; Described fuse F2 connecting valve SW2, described interrupteur SW 2 connects the positive terminal BT+ of described reserve battery; The anode of described diode D17 is connected to one end of resistance R61, R56 in parallel; The other end of described resistance R61 is connected to one end of resistance R60, electric capacity C23 and resistance R65, the other end ground connection of described resistance R60 is also connected with the other end of described electric capacity C23, the positive pole of the negative electrode of another terminating diode D14 of described resistance R65, the anode of diode D13 and hysteresis comparator U9, the negative electrode of described diode D13 connects the negative pole of described hysteresis comparator U9.
The other end of described resistance R56 connects one end of 2 pin of precision voltage regulator Q15,3 pin and resistance R57,3 pin of described precision voltage regulator Q15 connect one end of electric capacity C23, the other end of described electric capacity C23 connects 1 pin of described precision voltage regulator Q15, the 4th optocoupler, 1 pin of timer U8 and the source electrode of power tube Q12, the source ground of described power tube Q12; One end of the grid contact resistance R67 of described power tube Q12, the other end of described resistance R67 connects 4 pin of described timer U8 and one end of resistance R68, the other end ground connection of described resistance R68 and the source electrode etc. of power tube Q12; Drain electrode contact resistance R42, R29 of described power tube Q12 and one end of switch S 1; One end of the other end contact resistance R58 of described resistance R42 and the other end of described resistance R57, the other end of described resistance R58 is connected to the negative pole of described hysteresis comparator U9 and the anode of described diode D13; The other end of described resistance R29 connects the other end of described switch S 1, the source electrode etc. of described power tube Q12, when the conode place of described resistance R57, R58, R42 is low level, described switch S 1 closes, otherwise, when their conode place is high level, described switch S 1 disconnects; Thus form cathode voltage production circuit 7.
The source electrode of described power tube Q12, switch S 1 are also connected to the emitter of triode Q14, one end of base stage contact resistance R48, R49 of described triode Q14, the other end of described resistance R48 connects the emitter of described triode Q14, the other end of described resistance R49 connects one end of described hysteresis comparator U9 and resistance R66, R59, the other end of described resistance R66 connects the anode of described diode D14, one end of described resistance R59 and other end connection hysteresis comparator U9, B end of hysteresis comparator U9, described resistance R59 and one end of electric capacity C24; Described hysteresis comparator U9 connects described B and holds, and the other end ground connection of described electric capacity C24 also connects described hysteresis comparator U9, thus forms described voltage comparator circuit 18.
Described voltage comparator circuit 18 is connected to relay R ELAY, concrete, the collector electrode of described triode Q14 is connected to the anode of diode D16, the negative electrode of described diode D16 is connected to the negative electrode of diode D7 and 2 pin of relay R ELAY, the anode of described diode D7 connects 1 pin and the B end of described relay R ELAY, and 1 pin of described relay R ELAY connects described B and holds, and 3 pin of described relay R ELAY connect A end, its 4 pin connects B end, and its 5 pin does not use.
When the mark of the various end points occurred in the present invention is identical, show that circuit is connected at this end points place.
Whole circuit of the present invention can realize the automatic detection of the active and standby signal of telecommunication and realize wholely leading to switching between active and standby electricity for electric system, and process during its work is as follows:
220V civil power obtains high voltage direct current after described full bridge rectifier, described power supply chip U1 is by adjustment duty ratio, thus control described mos pipe open closing time, thus high voltage direct current is obtained high-frequency and high-voltage alternating current through PWM (pulse width modulation), described High Level AC Voltage obtains high frequency low voltage alternating current through described high frequency transformer T1 again, and the voltage that described high frequency transformer T1 exports generates 13.6V voltage after half-wave rectifying circuit 7 and LC filter circuit 8.
Simultaneously, 6 pin of described PWM chip U3 drive the first triode Q9 and the second triode Q10 to produce alternating current, thus drive described 3rd triode Q7 conducting, the conducting of described 3rd triode Q7 drives again the conducting of described metal-oxide-semiconductor Q2, thus make described common mode inductance T2 produce induced current and 3 pin being transferred to described PWM chip U3 do current overload feedback, thus know the voltage of current state, duty ratio is adjusted by described PWM chip U3, thus by described inductance L 2 ceaselessly discharge and recharge carry out step-down, the 13.6V direct current that the most described high frequency transformer exports changes 5V direct current into.
On the other hand, described city power detection circuit 15 detects civil power in real time, line voltage is had to pass through when described city power detection circuit 15 detects, optocoupler conducting, the 13.6V that described high frequency transformer T1 exports starts ON operation, adjusts duty ratio, thus drive being turned on or off of described power tube Q12 by described timer U8, when the conducting of described power tube Q12, to hysteresis comparator U9 negative terminal power supply signal; The voltage of the positive terminal BT+ of described reserve battery is transported to the anode of described hysteresis comparator U9 simultaneously, through the comparison of described hysteresis comparator U9, control the work of described relay R ELAY, now described relay R ELAY is in adhesive operating state, charges to described reserve battery;
When described power tube Q12 disconnects, the magnitude of voltage of described hysteresis comparator U9 negative terminal changes, and described relay R ELAY disconnects, and quits work.
When without civil power time, described backup batteries discharge work, described hysteresis comparator U9 detects sampled voltage, and when magnitude of voltage is lower than 10.6V time, described relay R ELAY disconnects, and quits work.
Whole comprehensive electric power system can carry out the detection of the active and standby signal of telecommunication automatically, thus the effective stability ensureing whole system operation.
The present invention still has numerous embodiments, all employing equivalents or equivalent transformation and all technical schemes formed, and all drops within protection scope of the present invention.
Claims (8)
1. possesses the comprehensive electric power system of fire-fighting main frame of active and standby power detection circuit, it is characterized in that: comprise the Switching Power Supply power supply circuits (50) line voltage being changed into the output of 13.6V direct current, described Switching Power Supply power supply circuits (50) are connected to for 13.6V direct current being changed into the galvanic reduction voltage circuit of 5V (30) and the reserve battery running control circuit (40) for detection control reserve battery running status, described reserve battery running control circuit (40) comprises city's power detection circuit (15), described city power detection circuit (15) is connected to voltage stabilizing circuit (16) and charging circuit (17), described charging circuit (17) is connected to 13.6V DC output end and the voltage comparator circuit (18) of high frequency transformer (T1), described voltage comparator circuit (18) connects the positive terminal (BT+) of reserve battery and relay (RELAY) and controls its work.
2. the comprehensive electric power system of fire-fighting main frame possessing active and standby power detection circuit according to claim 1, it is characterized in that: described Switching Power Supply power supply circuits (50) comprise mains connection, described mains connection connects electromagnetic interference filtering circuit (1), described electromagnetic interference filtering circuit (1) connects overcurrent-overvoltage protecting circuit (2), described overcurrent-overvoltage protecting circuit (2) is connected to full bridge rectifier (3), described full bridge rectifier (3) is connected to discharge circuit (4) by transient current absorbing circuit, pwm control circuit (5) is connected to by bleeder circuit, described discharge circuit (4) and pwm control circuit (5) are connected to each other and are all connected to high frequency transformer (T1), the high frequency low voltage alternating current that described high frequency transformer (T1) exports generates 13.6V low-voltage DC after half-wave rectifying circuit (7) and LC filter circuit (8).
3. the comprehensive electric power system of fire-fighting main frame possessing active and standby power detection circuit according to claim 2, is characterized in that: described electromagnetic interference filtering circuit (1) comprises the first common mode inductance (LF2) and the second common mode inductance (LF1).
4. the comprehensive electric power system of fire-fighting main frame possessing active and standby power detection circuit according to claim 3, is characterized in that: described overcurrent-overvoltage protecting circuit (2) comprises thermistor (RTH1) in parallel and the voltage-stabiliser tube (Z1) of two differential concatenations.
5. according to the arbitrary described comprehensive electric power system of fire-fighting main frame possessing active and standby power detection circuit of claim 1-4, it is characterized in that: described reduction voltage circuit (30) comprises sampling switch power control circuit (11), described sampling switch power control circuit (11) is connected to the push-pull circuit (12) and feedback circuit (14) that are connected to each other, described push-pull circuit (12) is connected to metal-oxide-semiconductor drive circuit (13), described metal-oxide-semiconductor drive circuit (13) is connected to metal-oxide-semiconductor (Q2) and feedback circuit (14), described metal-oxide-semiconductor (Q2) connects described high frequency transformer (T1) and feedback circuit (14), described feedback circuit (14) connects charge-discharge circuit (60), the 13.6V direct current step-down that described high frequency transformer (T1) inputs by described charge-discharge circuit (60) is that 5V direct current exports.
6. the comprehensive electric power system of fire-fighting main frame possessing active and standby power detection circuit according to claim 5, it is characterized in that: described push-pull circuit (12) comprises the first triode (Q9) and second triode (Q10) of emitter connection, the base stage of described first triode (Q9) and the second triode (Q10) is all connected to 6 pin of PWM chip (U3) in described sampling switch power control circuit (1) by resistance (R24), the collector electrode of described first triode (Q9) connects 3 pin of described PWM chip (U3), the collector electrode of described second triode (Q10) connects 5 pin of described PWM chip (U3), described first triode (Q9) and described second triode (Q10) alternation under the control of described PWM chip (U3).
7. the comprehensive electric power system of fire-fighting main frame possessing active and standby power detection circuit according to claim 6, it is characterized in that: described charging circuit (17) comprises the drive circuit and timer pulse modulation circuit that are connected to each other, described drive circuit and timer pulse modulation circuit are all connected to the 13.6V DC output end of described city power detection circuit (15) and high frequency transformer (T1), and described timer pulse modulation circuit is connected to described voltage comparator circuit (18).
8. the comprehensive electric power system of fire-fighting main frame possessing active and standby power detection circuit according to claim 7, it is characterized in that: described voltage comparator circuit (18) comprises the cathode voltage generative circuit (19), cathode voltage generative circuit (21) and the hysteresis comparator (U9) that are connected to each other, and described cathode voltage generative circuit (19) and cathode voltage generative circuit (21) all connect the positive terminal (BT+) of reserve battery.
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| CN201510805731.8A CN105375615A (en) | 2015-11-20 | 2015-11-20 | Fire-fighting host computer comprehensive power supply system equipped with main and standby power detecting circuit |
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| CN201510805731.8A CN105375615A (en) | 2015-11-20 | 2015-11-20 | Fire-fighting host computer comprehensive power supply system equipped with main and standby power detecting circuit |
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| CN113703355A (en) * | 2021-08-05 | 2021-11-26 | 百富计算机技术（深圳）有限公司 | Antenna magnetic field intensity control circuit and electronic equipment |
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Application publication date: 20160302 |