CN104518673A - Switching power supply for inversion device of communication machine room - Google Patents
Switching power supply for inversion device of communication machine room Download PDFInfo
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- CN104518673A CN104518673A CN201510023303.XA CN201510023303A CN104518673A CN 104518673 A CN104518673 A CN 104518673A CN 201510023303 A CN201510023303 A CN 201510023303A CN 104518673 A CN104518673 A CN 104518673A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/14—Arrangements for reducing ripples from dc input or output
- H02M1/143—Arrangements for reducing ripples from dc input or output using compensating arrangements
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0025—Arrangements for modifying reference values, feedback values or error values in the control loop of a converter
Abstract
The invention relates to the technical fields of power sources and electronics, and particularly provides a switching power supply for an inversion device of a communication machine room. The switching power supply comprises a high-frequency transformer, a multi-path output rectification filtering and voltage stabilization circuit and a switching power supply controller, wherein a primary winding of the high-frequency transformer is externally connected with a power supply, and an auxiliary winding of the high-frequency transformer is connected with the multi-path output rectification filtering and voltage stabilization circuit; the multi-path output rectification filtering and voltage stabilization circuit comprises pi type capacitive reactance high-frequency filtering circuits, common-mode filtering capacitors and voltage stabilization chips. The switching power supply further comprises a voltage feedback and error compensation circuit and a driving and buffer circuit, wherein the switching power supply controller is connected with a feedback winding of the high-frequency transformer through the voltage feedback and error compensation circuit, and is connected with the primary winding of the high-frequency transformer through the driving and buffer circuit. According to the switching power supply, the voltage feedback and error compensation circuit and the multi-path output rectification filtering and voltage stabilization circuit are arranged, so that a stable and reliable power supply with smaller voltage ripples can be provided for the inversion device of the communication machine room.
Description
Technical field
The present invention relates to power supply and electronic technology field, in particular to a kind of Switching Power Supply of the inverter for communications equipment room.
Background technology
Switching Power Supply adopts power semiconductor as switch element exactly, by periodicity on-off switch, the duty ratio adjustment output voltage of control switch element, along with the continuous propelling of intelligent grid construction process, the application of modern communication technology in delivery of electrical energy and conversion is more and more extensive.
How all kinds of alternating current equipments of communications equipment room in case of emergency carry out AC/DC inversion by batteries is powered, and the normal need of work Switching Power Supply of inverter drives its control system, voltage, current detecting and switching device carries out the mutually isolated power supply of multichannel.Meanwhile, the DC bus-bar voltage of originating owing to providing inverter energy may fluctuate within the specific limits, and Switching Power Supply must possess stronger adaptability to the change of DC input voitage.In addition, must be reliable and stable to the power supply of sophisticated sensor, voltage ripple is less, to ensure system worked well.Therefore, conventional switching power supply is needed badly and is realized above function, meets the high-quality requirement that inverter is powered.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of Switching Power Supply of the inverter for communications equipment room, the inverter for communications equipment room provide reliable and stable, voltage ripple small electric source.
The present invention is achieved in that
First aspect, embodiments provide a kind of Switching Power Supply of the inverter for communications equipment room, comprise high frequency transformer, multiple-channel output rectifying and wave-filtering and voltage stabilizing circuit and switch power controller, the former limit winding external power supply of described high frequency transformer, the vice-side winding of described high frequency transformer is connected with described multiple-channel output rectifying and wave-filtering and voltage stabilizing circuit, and described multiple-channel output rectifying and wave-filtering and voltage stabilizing circuit comprise π type capacitive reactance high-frequency filter circuit, common mode filtering electric capacity and voltage stabilizing chip;
Described Switching Power Supply also comprises Voltage Feedback and error compensation circuit and driving and buffer circuit, described switch power controller connects the feedback winding of described high frequency transformer by described Voltage Feedback and error compensation circuit, and described switch power controller connects the former limit winding of described high frequency transformer by described driving and buffer circuit.
In conjunction with first aspect, embodiments provide the first possible execution mode of first aspect, wherein said Switching Power Supply also comprises input filter circuit, and described high frequency transformer is by described input filter circuit external power supply; Described input filter circuit comprises: electric capacity C1, electric capacity C2, inductance L 1 and inductance L 2, described electric capacity C1 connects described electric capacity C2 in parallel after described inductance L 1, and described inductance L 2 of connecting between described electric capacity C1 and another polarity side of described electric capacity C2, described input filter circuit is by fuse F1 external direct current power supply.
Input filter circuit external power supply, by the AC signal elimination in circuit, and plays certain pressure stabilization function.
In conjunction with the first possible execution mode of first aspect, embodiments provide the execution mode that the second of first aspect is possible, wherein said Switching Power Supply also comprises start-up circuit, described input filter circuit connects described switch power controller by described start-up circuit, described start-up circuit comprises electric capacity C4, electric capacity C5 and resistance R2, connect after described electric capacity C4 and described electric capacity C5 parallel connection described resistance R2, described resistance R2 connects described inductance L 1, the points of common connection of the former limit winding of described electric capacity C2 and described high frequency transformer, the polarity side that described electric capacity C4 is connected described resistance R2 with described electric capacity C5 connects described switch power controller, another polarity side joint ground of described electric capacity C4 and described electric capacity C5.
When the direct voltage of input filter circuit increases in working range, and the electric capacity C4 comprised to start-up circuit by R2 and electric capacity C5 is charged, when making the voltage at electric capacity C4 and electric capacity C5 two ends reach the starting resistor of switch power controller, switch power controller is started working.After switch power controller is started working, by feed back and error compensation circuit is that switch power controller is powered.
In conjunction with the execution mode that the second of first aspect is possible, embodiments provide the third possible execution mode of first aspect, wherein said switch power controller is UC3842, and the pin 7 of described UC3842 connects described resistance R2.
Start-up circuit by the pin 7 of UC3842 for UC3842 powers.
In conjunction with the third possible execution mode of first aspect, embodiments provide the 4th kind of possible execution mode of first aspect, wherein said Voltage Feedback and error compensation circuit comprise voltage feedback circuit and error compensation circuit,
Described voltage feedback circuit comprises rectifier diode VD2, after described rectifier diode VD2 is in parallel with electric capacity C6, electric capacity C7 and resistance R6, then series rectifier diode VD3, then shunt capacitance C4 and electric capacity C5, series resistance R4 and adjustable resistance R10, resistance R10 shunt capacitance C9 successively again;
The output of the feedback winding of described high frequency transformer is powered for described UC3842 after described voltage feedback circuit rectification and filtering, and simultaneously after described resistance R4 and resistance R10 dividing potential drop, voltage feedback signal inputs the pin 2 of described UC3842;
Described error compensation circuit comprises resistance R7 in parallel and electric capacity C8, described error compensation circuit connects the pin 1 of described resistance R4 and described UC3842, between described pin 2 and described pin 1, form PI regulate (proportional integral controller, proportion adjustment and integral adjustment), to improve the frequency characteristic of feedback loop.
When output voltage changes, voltage feedback circuit sends change at the input signal of the pin 2 of UC3842, and the duty ratio of UC3842 regulation output pulsewidth is accordingly with regulated output voltage.
In conjunction with the third possible execution mode of first aspect, embodiments provide the 5th kind of possible execution mode of first aspect, wherein said driving and buffer circuit comprise drive circuit and buffer circuit,
Described drive circuit comprises resistance R8, resistance R12 and metal-oxide-semiconductor, described resistance R8 is connected the grid of described metal-oxide-semiconductor afterwards with described resistance R12 parallel connection, described resistance R8 connects the pin 6 of described UC3842, the drain electrode of described metal-oxide-semiconductor connects the former limit winding of described high frequency transformer, and the source electrode of described metal-oxide-semiconductor is by resistance R14 ground connection;
Described buffer circuit described metal-oxide-semiconductor in parallel, described buffer circuit comprises diode VD4, resistance R9 and electric capacity C10, connect after described diode VD4 described resistance R9 in parallel described electric capacity C10, the negative pole of described diode VD4 connects the source electrode of described metal-oxide-semiconductor, and described electric capacity C10 connects the drain electrode of described metal-oxide-semiconductor.
The driving pulse that the pin 6 of UC3842 sends makes the metal-oxide-semiconductor in drive circuit intermittently connect, and the former limit winding of high frequency transformer is intermittently energized, and produces AC signal, realizes the conversion of electric energy.Buffer circuit plays the effect of buffering.
In conjunction with the third possible execution mode of first aspect, embodiments provide the 6th kind of possible execution mode of first aspect, wherein said oscillating circuit comprises resistance R11, electric capacity C11 and electric capacity C12, described resistance R11 to connect after described electric capacity C11 described electric capacity C12 in parallel again, described oscillating circuit connects the pin 4 of described UC3842, and the pin 8 of described UC3842 connects described resistance R11 and electric capacity C11.
Oscillating circuit determines the switching frequency of high frequency transformer by UC3842.
In conjunction with first aspect, embodiments provide the 7th kind of possible execution mode of first aspect, wherein said multiple-channel output rectifying and wave-filtering and voltage stabilizing circuit comprise 9 road direct currents and export, and the common ground direct current output that described 9 road direct currents outputs comprise the independently 15V direct current output of three tunnels, two-way 15V direct current altogether exports, two-way is respectively positive and negative 15V and two-way independently 24V direct current export;
The described three tunnels upper brachium pontis that independently 15V direct current exports as the inverter of described communications equipment room is powered; The main circuit overheating protection circuit that described two-way 15V direct current altogether exports the lower brachium pontis and inverter being respectively the inverter of communications equipment room is powered; The measure voltage & current components and parts that the common ground direct current that described two-way is respectively positive and negative 15V exports as the inverter of described communications equipment room are powered; The two-way control system that independently 24V direct current exports as the inverter of described communications equipment room is powered.
In conjunction with the 7th kind of possible execution mode of first aspect, embodiments provide the 8th kind of possible execution mode of first aspect, wherein said three tunnels independently 15V direct current export output rectification filter and voltage stabilizing circuit include a π type capacitive reactance high-frequency filter circuit, a described π type capacitive reactance high-frequency filter circuit comprises electric capacity C14, electric capacity C15, resistance R15, inductance L 3, electric capacity C16 and electric capacity C17, described electric capacity C14, described electric capacity C15 and described resistance R15 rear described inductance L 3 of all connecting parallel with one another, described electric capacity C16 in parallel and described electric capacity C17 again, a described π type capacitive reactance high-frequency filter circuit is all in series with rectifier diode VD5,
The output rectification filter that described two-way 15V direct current altogether exports and voltage stabilizing circuit include the 2nd π type capacitive reactance high-frequency filter circuit, described 2nd π type capacitive reactance high-frequency filter circuit comprises electric capacity C18, electric capacity C19, resistance R16, inductance L 4, electric capacity C20 and electric capacity C21, described electric capacity C18, described electric capacity C19 and described resistance R16 rear described inductance L 4 of all connecting parallel with one another, described electric capacity C20 in parallel and described electric capacity C21 again, described 2nd π type capacitive reactance high-frequency filter circuit is all in series with rectifier diode VD6;
The output rectification filter that the common ground direct current that described two-way is respectively positive and negative 15V exports and voltage stabilizing circuit include the 3rd π type capacitive reactance high-frequency filter circuit, described 3rd π type capacitive reactance high-frequency filter circuit comprises electric capacity C22, electric capacity C23, resistance R17, LM7815 voltage stabilizing chip, electric capacity C24 and electric capacity C25, described electric capacity C22, described electric capacity C23 and described resistance R17 rear LM7815 voltage stabilizing chip of all connecting parallel with one another, described electric capacity C24 in parallel and described electric capacity C25 again, described 3rd π type capacitive reactance high-frequency filter circuit is all in series with rectifier diode VD7; Described 3rd π type capacitive reactance high-frequency filter circuit is all by common mode filtering electric capacity C26 ground connection;
Described two-way independently 24V direct current export output rectification filter and voltage stabilizing circuit include the 4th π type capacitive reactance high-frequency filter circuit, described 4th π type capacitive reactance high-frequency filter circuit comprises electric capacity C27, electric capacity C28, resistance R18, inductance L 5, resistance R19, electric capacity C29 and electric capacity C30, described electric capacity C27, described electric capacity C28 and described resistance R18 rear described inductance L 5 of all connecting parallel with one another, described resistance R19 in parallel again, described electric capacity C29 and described electric capacity C30, described 4th π type capacitive reactance high-frequency filter circuit is all in series with rectifier diode VD8 parallel with one another and rectifier diode VD9, described 4th π type capacitive reactance high-frequency filter circuit is all by common mode filtering electric capacity C31 ground connection.
The 9 road direct currents inverter exported as communications equipment room provides stable and independently power supply.The arranging of π type capacitive reactance high-frequency filter circuit, common mode filtering electric capacity and voltage stabilizing chip makes the power good exported further.
In conjunction with first aspect, embodiments provide the 9th kind of possible execution mode of first aspect, wherein said Switching Power Supply also comprises the absorbing circuit of the former limit winding connecting described high frequency transformer, and described absorbing circuit is for cushioning the fluctuation of the voltage of input; Described absorbing circuit comprises resistance R3, electric capacity C3 and diode VD1, and connect after described resistance R3 described electric capacity C3 in parallel described diode VD1, and wherein said resistance R3 is connected the negative pole of described diode VD1 with described electric capacity C3.
Absorbing circuit is used for the power supply of buffered hf transformer primary side winding switching, the adverse effect that less power-supply fluctuation brings.
The technique effect that the present invention realizes: a kind of Switching Power Supply of the inverter for communications equipment room comprises Voltage Feedback and error compensation circuit, and 9 road DC output end mouths are provided with π type capacitive reactance high-frequency filter circuit, common mode filtering electric capacity and voltage stabilizing chip, can provide reliable and stable for the inverter of communications equipment room, voltage ripple small electric source.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the embodiment of the present invention, be briefly described to the accompanying drawing used required in embodiment below, be to be understood that, the following drawings illustrate only some embodiment of the present invention, therefore the restriction to scope should be counted as, for those of ordinary skill in the art, under the prerequisite not paying creative work, other relevant accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 shows the connection block diagram of the Switching Power Supply of the inverter for communications equipment room that first embodiment of the invention provides;
Fig. 2 shows the connection block diagram of the Switching Power Supply of the inverter for communications equipment room that second embodiment of the invention provides;
Fig. 3 shows the circuit diagram of the Switching Power Supply of the inverter for communications equipment room that second embodiment of the invention provides.
Mark in figure: high frequency transformer 101; switch power controller 102; multiple-channel output rectifying and wave-filtering and voltage stabilizing circuit 103; Voltage Feedback and error compensation circuit 104, drive and buffer circuit 105, input filter circuit 106; start-up circuit 107; absorbing circuit 108, current detecting and protective circuit 109, oscillating circuit 110.
Embodiment
Below in conjunction with accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.The assembly of the embodiment of the present invention describing and illustrate in usual accompanying drawing herein can be arranged with various different configuration and design.Therefore, below to the detailed description of the embodiments of the invention provided in the accompanying drawings and the claimed scope of the present invention of not intended to be limiting, but selected embodiment of the present invention is only represented.Based on embodiments of the invention, the every other embodiment that those skilled in the art obtain under the prerequisite not making creative work, all belongs to the scope of protection of the invention.
How all kinds of alternating current equipments of communications equipment room in case of emergency carry out AC/DC inversion by batteries is powered, and the normal need of work Switching Power Supply of inverter drives its control system, measure voltage & current and switching device carries out the mutually isolated power supply of multichannel.Meanwhile, owing to providing the DC bus-bar voltage of inverter energy source to fluctuate within the specific limits, Switching Power Supply must possess stronger adaptability to the change of DC input voitage.In addition, must be reliable and stable to the power supply of sophisticated sensor, voltage ripple is less, to ensure system worked well.Therefore, conventional switching power supply is needed badly and is realized above function, meets the high-quality requirement that inverter is powered.The embodiment of the present invention is disclosed can for the power supply that inverter provides reliable and stable, voltage ripple is less for the Switching Power Supply of the inverter of communications equipment room.
Consult Fig. 1, the Switching Power Supply of the inverter for communications equipment room that the first embodiment provides, comprises high frequency transformer 101, multiple-channel output rectifying and wave-filtering and voltage stabilizing circuit 103 and switch power controller 102.The former limit winding external power supply of high frequency transformer 101, the vice-side winding of high frequency transformer 101 is connected with multiple-channel output rectifying and wave-filtering and voltage stabilizing circuit 103, and multiple-channel output rectifying and wave-filtering and voltage stabilizing circuit 103 comprise π type capacitive reactance high-frequency filter circuit, common mode filtering electric capacity and voltage stabilizing chip.
Switching Power Supply also comprises Voltage Feedback and error compensation circuit 104 and drives and buffer circuit 105, switch power controller 102 connects the feedback winding of high frequency transformer 101 by Voltage Feedback and error compensation circuit 104, and switch power controller 102 connects the former limit winding of high frequency transformer 101 by driving and buffer circuit 105.
When using this Switching Power Supply, the former limit winding external power supply of high frequency transformer 101, the vice-side winding of high frequency transformer 101 connects multiple-channel output rectifying and wave-filtering and voltage stabilizing circuit 103.Switch power controller 102 sends drive singal to driving and buffer circuit 105, and driving and buffer circuit 105 make the former limit winding of high frequency transformer 101 switch on power, and achieves direct current to the conversion exchanged.After obtaining AC signal, the vice-side winding of high frequency transformer 101 produces induced current, induced current is rectified and filtering after multiple-channel output rectifying and wave-filtering and voltage stabilizing circuit 103, and π type capacitive reactance high-frequency filter circuit, common mode filtering electric capacity and voltage stabilizing chip that multiple-channel output rectifying and wave-filtering and voltage stabilizing circuit 103 are arranged make the current stabilization of multiple-channel output rectifying and wave-filtering and voltage stabilizing circuit 103 output and voltage ripple is less.The change in voltage of external power supply is fed back to switch power controller 102 by Voltage Feedback and error compensation circuit 104, switch power controller 102 controls the duty ratio of drive singal, to make the output voltage stabilization of multiple-channel output rectifying and wave-filtering and voltage stabilizing circuit 103 according to the change in voltage of external power supply.
Consult Fig. 2, the Switching Power Supply of the inverter for communications equipment room that the second embodiment provides also comprises input filter circuit 106, start-up circuit 107, absorbing circuit 108, oscillating circuit 110, current detecting and protective circuit 109 on the basis of the first embodiment.Input filter circuit 106 external power supply, the former limit winding switching input filter circuit 106 of high frequency transformer 101.Input filter circuit 106 is also by start-up circuit 107 connecting valve power-supply controller of electric 102.Absorbing circuit 108 connects the former limit winding of high frequency transformer 101.Oscillating circuit 110 connecting valve power-supply controller of electric 102.Switch power controller 102 also connects driving and buffer circuit 105 by current detecting and protective circuit 109.
Wherein, the DC power supply of the general external 200-500V of input filter circuit 106, plays the effect of filtering and voltage stabilizing, makes electric current and the voltage stabilization of the former limit winding of input high frequency transformer 101.Start-up circuit 107 is for being that switch power controller 102 is powered when this Switching Power Supply starts.When this Switching Power Supply works, then powered for switch power controller 102 by Voltage Feedback and error compensation circuit 104.The electric current that the former limit winding of stable input high frequency transformer 101 is further set of absorbing circuit 108 and voltage stabilization.Oscillating circuit 110 determines the switching frequency of high frequency transformer 101 by switch power controller 102.Current detecting and protective circuit 109 form overcurrent protection feedback element.
Consult Fig. 3, the embodiment of the present invention take UC3842 as switch power controller.UC3842 is a kind of current-control type pulse width modulating chip of function admirable, and it adopts the controlled modulation system of steady job frequency pulse width, and have 8 pins, each pin function is as follows:
Pin 1, the output of error amplifier, external resistor and capacitor component is for improving gain and the frequency characteristic of error amplifier; Pin 2, feedback voltage input, the 2.5V reference voltage of this pin voltage and error amplifier in-phase end compares, and produces error voltage, thus control impuls width; Pin 3, current sense input, when detection voltage makes power supply be in discontinuous operation state more than reducing pulse duration during 1V; Pin 4, timing end, the operating frequency of internal oscillator is determined by external capacity-resistance time constant, f=1.72/ (RT × CT); Pin 5 is common; Pin 6, recommends output, and inside is totem pillar, rises, fall time is only 50ns driving force for ± 1A; Pin 7, DC power supply end, has deficient, over-voltage locking function, and chip power-consumption is 15mW; Pin 8,5V reference voltage output end, has the load capacity of 50mA.
Input filter circuit 106 comprises electric capacity C1, electric capacity C2, inductance L 1 and inductance L 2, shunt capacitance C2 after electric capacity C1 series inductance L1, and between another polarity side of electric capacity C1 and electric capacity C2 series inductance L2, input filter circuit is by fuse F1 external direct current power supply.
Input filter circuit 106 connects UC3842 by start-up circuit 107.Start-up circuit 107 comprises electric capacity C4, electric capacity C5 and resistance R2, series resistance R2 after electric capacity C4 and electric capacity C5 parallel connection, resistance R2 connects the points of common connection of the former limit winding of inductance L 1, electric capacity C2 and high frequency transformer 101, electric capacity C4 is connected UC3842 with the polarity side of electric capacity C5 contact resistance R2, resistance R2 connects the pin 7 of UC3842, another polarity side joint ground of electric capacity C4 and electric capacity C5.
Voltage Feedback and error compensation circuit 104 comprise voltage feedback circuit and error compensation circuit.Voltage feedback circuit comprises rectifier diode VD2, after rectifier diode VD2 is in parallel with electric capacity C6, electric capacity C7 and resistance R6, series rectifier diode VD3 again, shunt capacitance C4 and electric capacity C5 again, series resistance R4 and adjustable resistance R10 successively again, resistance R10 shunt capacitance C9, electric capacity C9 makes the adjustment of adjustable resistance R10 level and smooth.
The output signal of the feedback winding of high frequency transformer 101 is connected the pin 7 of UC3842 after filtering through voltage feedback circuit rectification, for UC3842 powers, simultaneously after resistance R4 and resistance R10 dividing potential drop, and the pin 2 of voltage feedback signal input UC3842.
Error compensation circuit comprises resistance R7 in parallel and electric capacity C8, the pin 1 of error compensation circuit contact resistance R4 and UC3842, forms PI and regulate, to improve the frequency characteristic of feedback loop between pin 2 and pin 1.
Driving and buffer circuit 105 comprise drive circuit and buffer circuit.Drive circuit comprises resistance R8, resistance R12 and metal-oxide-semiconductor, resistance R8 is connected the grid of metal-oxide-semiconductor afterwards with resistance R12 parallel connection, resistance R8 connects the pin 6 of UC3842, and the drain electrode of metal-oxide-semiconductor connects the former limit winding of high frequency transformer, and the source electrode of metal-oxide-semiconductor is by resistance R14 ground connection.
Buffer circuit paralleling MOS pipe, buffer circuit comprises diode VD4, resistance R9 and electric capacity C10, and the negative pole of series capacitance C10 after diode VD4 parallel resistance R9, diode VD4 connects the source electrode of metal-oxide-semiconductor, and electric capacity C10 connects the drain electrode of metal-oxide-semiconductor.
Oscillating circuit 110 comprises resistance R11, electric capacity C11 and electric capacity C12, shunt capacitance C12 again after resistance R11 series capacitance C11, resistance R11 is connected the pin 4 of UC3842 with the points of common connection of electric capacity C11, the pin 8 contact resistance R11 of UC3842 and the points of common connection of electric capacity C11, electric capacity C11 and electric capacity C12 ground connection.By formula f=1.72/ (RT × CT), R11=20K Ω, C12=2.2nF in the embodiment of the present invention, show that the frequency of oscillation of oscillating circuit 110 is 40KHz.
Multiple-channel output rectifying and wave-filtering and voltage stabilizing circuit 103 comprise 9 road direct currents and export, and the common ground direct current output that 9 road direct currents outputs comprise the independently 15V direct current output of three tunnels, two-way 15V direct current altogether exports, two-way is respectively positive and negative 15V and two-way independently 24V direct current export.
Wherein, the three tunnels upper brachium pontis that independently 15V direct current exports as the inverter of communications equipment room is powered.The main circuit overheating protection circuit that two-way 15V direct current altogether exports the lower brachium pontis and inverter being respectively the inverter of communications equipment room is powered.The measure voltage & current components and parts that the common ground direct current that two-way is respectively positive and negative 15V exports as the inverter of communications equipment room are powered.The two-way control system that independently 24V direct current exports as the inverter of communications equipment room is powered.
Three tunnels independently 15V direct current output include a π type capacitive reactance high-frequency filter circuit, and a π type capacitive reactance high-frequency filter circuit comprises electric capacity C14, electric capacity C15, resistance R15, inductance L 3, electric capacity C16 and electric capacity C17.Electric capacity C14, electric capacity C15 and resistance R15 rear equal series inductance L3 parallel with one another, then shunt capacitance C16 and electric capacity C17, a π type capacitive reactance high-frequency filter circuit is all in series with rectifier diode VD5.
Two-way 15V direct current altogether exports and includes the 2nd π type capacitive reactance high-frequency filter circuit, and the 2nd π type capacitive reactance high-frequency filter circuit comprises electric capacity C18, electric capacity C19, resistance R16, inductance L 4, electric capacity C20 and electric capacity C21.Electric capacity C18, electric capacity C19 and resistance R16 rear equal series inductance L4 parallel with one another, then shunt capacitance C20 and electric capacity C21, the 2nd π type capacitive reactance high-frequency filter circuit is all in series with rectifier diode VD6.
The common ground direct current output that two-way is respectively positive and negative 15V includes the 3rd π type capacitive reactance high-frequency filter circuit, and the 3rd π type capacitive reactance high-frequency filter circuit comprises electric capacity C22, electric capacity C23, resistance R17, LM7815 voltage stabilizing chip, electric capacity C24 and electric capacity C25.Electric capacity C22, electric capacity C23 and resistance R17 rear LM7815 voltage stabilizing chip of all connecting parallel with one another, then shunt capacitance C24 and electric capacity C25, the 3rd π type capacitive reactance high-frequency filter circuit is all in series with rectifier diode VD7; 3rd π type capacitive reactance high-frequency filter circuit is all by common mode filtering electric capacity C26 ground connection.
Two-way independently 24V direct current output includes the 4th π type capacitive reactance high-frequency filter circuit, and the 4th π type capacitive reactance high-frequency filter circuit comprises electric capacity C27, electric capacity C28, resistance R18, inductance L 5, resistance R19, electric capacity C29 and electric capacity C30.Electric capacity C27, electric capacity C28 and resistance R18 rear equal series inductance L5 parallel with one another, then parallel resistance R19, electric capacity C29 and electric capacity C30, the 4th π type capacitive reactance high-frequency filter circuit is all in series with rectifier diode VD8 parallel with one another and rectifier diode VD9; 4th π type capacitive reactance high-frequency filter circuit is all by common mode filtering electric capacity C31 ground connection.
Absorbing circuit 108 connects the former limit winding of high frequency transformer 101, and absorbing circuit 108 is for cushioning the fluctuation of the voltage of input.Absorbing circuit comprises resistance R3, electric capacity C3 and diode VD1, series diode VD1 after resistance R3 shunt capacitance C3, and wherein resistance R3 is connected the negative pole of diode VD1 with electric capacity C3.
Current detecting and protective circuit 109 comprise sample resistance R14, resistance R13 and electric capacity C13.The equal ground connection of shunt capacitance C13, sample resistance R14 and electric capacity C13 again after sample resistance R14 series resistance R13.Sample resistance R14 transfers the electric current flowing through high frequency transformer 101 former limit winding to voltage signal, accesses the pin 3 of UC3842 after resistance R13 and electric capacity C13 filtering, forms overcurrent protection feedback element.When the voltage that UC3842 detects on sample resistance R14 exceedes setting alarming value, UC3842 overcurrent protection function starts, latch actuation pulse.
This Switching Power Supply being used for the inverter of communications equipment room also comprises power indicating circuit and feedback indicating circuit.Power indicating circuit and input filter circuit 106 parallel connection, power indicating circuit comprises resistance R1 and the LED 1 of series connection, and resistance R1 is connected to the points of common connection of fuse F1 and inductance L 1, the minus earth of optical diode LED1.Feedback indicating circuit comprises resistance R5 and the LED 2 of series connection, and resistance R5 connects the points of common connection of diode VD2 and diode VD3, the minus earth of LED 2.
When using this Switching Power Supply for the inverter of communications equipment room, Switching Power Supply connects battery pack, and battery pack provides the direct current of 200-500V, and after electric current flows through input filter circuit 106, the AC signal that may exist is by filtering, simultaneously more stable.When the voltage of the electric capacity that start-up circuit 107 comprises reaches the operating voltage of UC3842, UC3842 starts working.The pin 6 of UC3842 sends drive singal to driving and buffer circuit 105, the metal-oxide-semiconductor conducting that driving and buffer circuit 105 comprise, and the former limit winding of high frequency transformer 101 is by electric current, and electric current flows through drain electrode and the source electrode of metal-oxide-semiconductor.When the pin 6 of UC3842 does not send drive singal to driving and buffer circuit 105, the former limit winding of high frequency transformer 101 does not have electric current.Electric current is break-make intermittently, electric energy is sent to the vice-side winding of high frequency transformer 101.Vice-side winding has 9 road output rectification filter and voltage stabilizing circuits, and the π type capacitive reactance high-frequency filter circuit that output circuit is arranged, common mode filtering electric capacity and voltage stabilizing chip make the current stabilization of output and voltage ripple is less.The change in voltage of battery pack is fed back to switch power controller 102 by Voltage Feedback and error compensation circuit 104, switch power controller 102 controls the duty ratio of drive singal, to make the output voltage stabilization of multiple-channel output rectifying and wave-filtering and voltage stabilizing circuit 103 according to the change in voltage of external power supply.
Obviously, those skilled in the art should be understood that, above-mentioned of the present invention each module can realize with general calculation element, they can concentrate on single calculation element, or be distributed on network that multiple calculation element forms, they can be made into each integrated circuit modules respectively, or the multiple module makings in them are become single integrated circuit module to realize.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. the Switching Power Supply for the inverter of communications equipment room, it is characterized in that, comprise high frequency transformer, multiple-channel output rectifying and wave-filtering and voltage stabilizing circuit and switch power controller, the former limit winding external power supply of described high frequency transformer, the vice-side winding of described high frequency transformer is connected with described multiple-channel output rectifying and wave-filtering and voltage stabilizing circuit, and described multiple-channel output rectifying and wave-filtering and voltage stabilizing circuit comprise π type capacitive reactance high-frequency filter circuit, common mode filtering electric capacity and voltage stabilizing chip;
Described Switching Power Supply also comprises Voltage Feedback and error compensation circuit and driving and buffer circuit, described switch power controller connects the feedback winding of described high frequency transformer by described Voltage Feedback and error compensation circuit, and described switch power controller connects the former limit winding of described high frequency transformer by described driving and buffer circuit.
2. the Switching Power Supply of the inverter for communications equipment room according to claim 1, is characterized in that, described Switching Power Supply also comprises input filter circuit, and described high frequency transformer is by described input filter circuit external power supply; Described input filter circuit comprises: electric capacity C1, electric capacity C2, inductance L 1 and inductance L 2, described electric capacity C1 connects described electric capacity C2 in parallel after described inductance L 1, and described inductance L 2 of connecting between described electric capacity C1 and another polarity side of described electric capacity C2, described input filter circuit is by fuse F1 external direct current power supply.
3. the Switching Power Supply of the inverter for communications equipment room according to claim 2, it is characterized in that, described Switching Power Supply also comprises start-up circuit, described input filter circuit connects described switch power controller by described start-up circuit, described start-up circuit comprises electric capacity C4, electric capacity C5 and resistance R2, connect after described electric capacity C4 and described electric capacity C5 parallel connection described resistance R2, described resistance R2 connects described inductance L 1, the points of common connection of the former limit winding of described electric capacity C2 and described high frequency transformer, the polarity side that described electric capacity C4 is connected described resistance R2 with described electric capacity C5 connects described switch power controller, another polarity side joint ground of described electric capacity C4 and described electric capacity C5.
4. the Switching Power Supply of the inverter for communications equipment room according to claim 3, is characterized in that, described switch power controller is UC3842, and the pin 7 of described UC3842 connects described resistance R2.
5. the Switching Power Supply of the inverter for communications equipment room according to claim 4, is characterized in that, described Voltage Feedback and error compensation circuit comprise voltage feedback circuit and error compensation circuit,
Described voltage feedback circuit comprises rectifier diode VD2, after described rectifier diode VD2 is in parallel with electric capacity C6, electric capacity C7 and resistance R6, then series rectifier diode VD3, then shunt capacitance C4 and electric capacity C5, series resistance R4 and adjustable resistance R10, resistance R10 shunt capacitance C9 successively again;
The output of the feedback winding of described high frequency transformer is powered for described UC3842 after described voltage feedback circuit rectification and filtering, and simultaneously after described resistance R4 and resistance R10 dividing potential drop, voltage feedback signal inputs the pin 2 of described UC3842;
Described error compensation circuit comprises resistance R7 in parallel and electric capacity C8, and described error compensation circuit connects the pin 1 of described resistance R4 and described UC3842, forms PI and regulate, to improve the frequency characteristic of feedback loop between described pin 2 and described pin 1.
6. the Switching Power Supply of the inverter for communications equipment room according to claim 4, is characterized in that, described driving and buffer circuit comprise drive circuit and buffer circuit,
Described drive circuit comprises resistance R8, resistance R12 and metal-oxide-semiconductor, described resistance R8 is connected the grid of described metal-oxide-semiconductor afterwards with described resistance R12 parallel connection, described resistance R8 connects the pin 6 of described UC3842, the drain electrode of described metal-oxide-semiconductor connects the former limit winding of described high frequency transformer, and the source electrode of described metal-oxide-semiconductor is by resistance R14 ground connection;
Described buffer circuit described metal-oxide-semiconductor in parallel, described buffer circuit comprises diode VD4, resistance R9 and electric capacity C10, connect after described diode VD4 described resistance R9 in parallel described electric capacity C10, the negative pole of described diode VD4 connects the source electrode of described metal-oxide-semiconductor, and described electric capacity C10 connects the drain electrode of described metal-oxide-semiconductor.
7. Switching Power Supply according to claim 4 is used for the Switching Power Supply of the inverter of communications equipment room, it is characterized in that, described oscillating circuit comprises resistance R11, electric capacity C11 and electric capacity C12, described resistance R11 to connect after described electric capacity C11 described electric capacity C12 in parallel again, described oscillating circuit connects the pin 4 of described UC3842, and the pin 8 of described UC3842 connects described resistance R11 and electric capacity C11.
8. Switching Power Supply according to claim 1 is used for the Switching Power Supply of the inverter of communications equipment room, it is characterized in that, described multiple-channel output rectifying and wave-filtering and voltage stabilizing circuit comprise 9 road direct currents and export, and the common ground direct current output that described 9 road direct currents outputs comprise the independently 15V direct current output of three tunnels, two-way 15V direct current altogether exports, two-way is respectively positive and negative 15V and two-way independently 24V direct current export;
The described three tunnels upper brachium pontis that independently 15V direct current exports as the inverter of described communications equipment room is powered; The main circuit overheating protection circuit that described two-way 15V direct current altogether exports the lower brachium pontis and inverter being respectively the inverter of communications equipment room is powered; The measure voltage & current components and parts that the common ground direct current that described two-way is respectively positive and negative 15V exports as the inverter of described communications equipment room are powered; The two-way control system that independently 24V direct current exports as the inverter of described communications equipment room is powered.
9. Switching Power Supply according to claim 8 is used for the Switching Power Supply of the inverter of communications equipment room, it is characterized in that, described three tunnels independently 15V direct current export output rectification filter and voltage stabilizing circuit include a π type capacitive reactance high-frequency filter circuit, a described π type capacitive reactance high-frequency filter circuit comprises electric capacity C14, electric capacity C15, resistance R15, inductance L 3, electric capacity C16 and electric capacity C17, described electric capacity C14, described electric capacity C15 and described resistance R15 rear described inductance L 3 of all connecting parallel with one another, described electric capacity C16 in parallel and described electric capacity C17 again, a described π type capacitive reactance high-frequency filter circuit is all in series with rectifier diode VD5,
The output rectification filter that described two-way 15V direct current altogether exports and voltage stabilizing circuit include the 2nd π type capacitive reactance high-frequency filter circuit, described 2nd π type capacitive reactance high-frequency filter circuit comprises electric capacity C18, electric capacity C19, resistance R16, inductance L 4, electric capacity C20 and electric capacity C21, described electric capacity C18, described electric capacity C19 and described resistance R16 rear described inductance L 4 of all connecting parallel with one another, described electric capacity C20 in parallel and described electric capacity C21 again, described 2nd π type capacitive reactance high-frequency filter circuit is all in series with rectifier diode VD6;
The output rectification filter that the common ground direct current that described two-way is respectively positive and negative 15V exports and voltage stabilizing circuit include the 3rd π type capacitive reactance high-frequency filter circuit, described 3rd π type capacitive reactance high-frequency filter circuit comprises electric capacity C22, electric capacity C23, resistance R17, LM7815 voltage stabilizing chip, electric capacity C24 and electric capacity C25, described electric capacity C22, described electric capacity C23 and described resistance R17 rear LM7815 voltage stabilizing chip of all connecting parallel with one another, described electric capacity C24 in parallel and described electric capacity C25 again, described 3rd π type capacitive reactance high-frequency filter circuit is all in series with rectifier diode VD7; Described 3rd π type capacitive reactance high-frequency filter circuit is all by common mode filtering electric capacity C26 ground connection;
Described two-way independently 24V direct current export output rectification filter and voltage stabilizing circuit include the 4th π type capacitive reactance high-frequency filter circuit, described 4th π type capacitive reactance high-frequency filter circuit comprises electric capacity C27, electric capacity C28, resistance R18, inductance L 5, resistance R19, electric capacity C29 and electric capacity C30, described electric capacity C27, described electric capacity C28 and described resistance R18 rear described inductance L 5 of all connecting parallel with one another, described resistance R19 in parallel again, described electric capacity C29 and described electric capacity C30, described 4th π type capacitive reactance high-frequency filter circuit is all in series with rectifier diode VD8 parallel with one another and rectifier diode VD9, described 4th π type capacitive reactance high-frequency filter circuit is all by common mode filtering electric capacity C31 ground connection.
10. the Switching Power Supply of the inverter for communications equipment room according to claim 1, it is characterized in that, described Switching Power Supply also comprises the absorbing circuit of the former limit winding connecting described high frequency transformer, and described absorbing circuit is for cushioning the fluctuation of the voltage of input; Described absorbing circuit comprises resistance R3, electric capacity C3 and diode VD1, and connect after described resistance R3 described electric capacity C3 in parallel described diode VD1, and wherein said resistance R3 is connected the negative pole of described diode VD1 with described electric capacity C3.
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| CN201510023303.XA CN104518673A (en) | 2015-01-16 | 2015-01-16 | Switching power supply for inversion device of communication machine room |
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| CN201510023303.XA CN104518673A (en) | 2015-01-16 | 2015-01-16 | Switching power supply for inversion device of communication machine room |
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| CN106160498A (en) * | 2016-08-31 | 2016-11-23 | 重庆佩特电气有限公司 | Double feedback multi-output switch power sources for Variable-pitch Controller |
| CN108054940A (en) * | 2017-12-18 | 2018-05-18 | 上海交通大学 | Capacitance series connection automatically equalizing voltage circuit and its control circuit |
| CN108233722A (en) * | 2018-03-23 | 2018-06-29 | 山东恒德智能装备科技有限公司 | A kind of DC-DC DC voltage-stabilizings multiple power supplies output circuit |
| CN108322051A (en) * | 2017-12-29 | 2018-07-24 | 河南北瑞电子科技有限公司 | A kind of inverse-excitation type switch power-supply |
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| CN106160498A (en) * | 2016-08-31 | 2016-11-23 | 重庆佩特电气有限公司 | Double feedback multi-output switch power sources for Variable-pitch Controller |
| CN108054940A (en) * | 2017-12-18 | 2018-05-18 | 上海交通大学 | Capacitance series connection automatically equalizing voltage circuit and its control circuit |
| CN108322051A (en) * | 2017-12-29 | 2018-07-24 | 河南北瑞电子科技有限公司 | A kind of inverse-excitation type switch power-supply |
| CN108233722A (en) * | 2018-03-23 | 2018-06-29 | 山东恒德智能装备科技有限公司 | A kind of DC-DC DC voltage-stabilizings multiple power supplies output circuit |
| CN108233722B (en) * | 2018-03-23 | 2024-01-16 | 鲁东大学 | DC-DC direct-current voltage-stabilizing multipath power supply output circuit |
| CN108768179A (en) * | 2018-07-20 | 2018-11-06 | 珠海格力电器股份有限公司 | Switching power circuit, driving plate and convertible frequency air-conditioner |
| CN109412433B (en) * | 2018-12-14 | 2023-10-24 | 中国电子科技集团公司第四十三研究所 | Linear adjusting circuit and adjusting method suitable for three-way output switching power supply |
| CN109412433A (en) * | 2018-12-14 | 2019-03-01 | 中国电子科技集团公司第四十三研究所 | A kind of linear regulation circuit and method of adjustment suitable for three road output switch power sources |
| CN112448600A (en) * | 2019-09-03 | 2021-03-05 | 西安航兴海拓电子科技有限公司 | Integrated power supply |
| CN111682772A (en) * | 2020-04-02 | 2020-09-18 | 上海航天控制技术研究所 | Multi-output switch power supply device of high-voltage servo controller |
| CN111682772B (en) * | 2020-04-02 | 2023-06-30 | 上海航天控制技术研究所 | Multi-output switching power supply device of high-voltage servo controller |
| CN114698165A (en) * | 2020-12-25 | 2022-07-01 | 杭州泰昕微电子有限公司 | Power semiconductor integrated device applied to electromagnetic energy-saving stove |
| CN112911411A (en) * | 2021-01-18 | 2021-06-04 | 陈源洋 | Original electric power capacity-increasing voltage-stabilizing system of base station |
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