CN102832694B - The accessory power supply of high power UPS - Google Patents
The accessory power supply of high power UPS Download PDFInfo
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- CN102832694B CN102832694B CN201210294441.8A CN201210294441A CN102832694B CN 102832694 B CN102832694 B CN 102832694B CN 201210294441 A CN201210294441 A CN 201210294441A CN 102832694 B CN102832694 B CN 102832694B
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Abstract
The invention discloses a kind of accessory power supply of high power UPS, comprise: direct voltage inputs, alternating voltage inputs, for preventing the buffer circuit of current flowing backwards, rectification circuit, filter circuit, semibridge system isolating switch translation circuit, rectifier filter circuit, electric current and voltage sample circuit, feedback control circuit, PWM controller and both-end inverse excitation type converter, direct voltage input is first successively through buffer circuit, filter circuit carries out isolation filter, then high-frequency PWM alternating voltage is converted to by semibridge system isolating switch translation circuit, isolation coupling is carried out again through rectifier filter circuit, output dc voltage after rectifying and wave-filtering, control semibridge system isolating switch translation circuit by PWM controller and export DC voltage-stabilizing, the input of both-end inverse excitation type converter is connected with the output of filter circuit, accesses power supply to make both-end inverse excitation type converter, both-end inverse excitation type converter is that PWM controller is powered.The present invention can provide reliable and stable direct voltage output to UPS.
Description
Technical field
The present invention relates to ups power, be specifically related to the accessory power supply of high power UPS.
Background technology
Along with the high speed development of power electronic technology, UPS is toward high reliability future development, and the triggering drive circuit of the logic control circuit in UPS, module all needs DC auxiliary supply and powers, therefore DC auxiliary supply must be very reliable.
But, generally powering with accessory power supply to UPS is all realized by simple single-ended reverse exciting translation circuit, the accessory power supply be made up of single-ended reverse exciting translation circuit is when input voltage is higher, power switch pipe bears higher voltage, current stress, easy damage, and when input voltage fluctuation is large, easily causes and export instability, finally cause UPS fault.
Summary of the invention
Technical problem to be solved by this invention, is just to provide a kind of accessory power supply of high power UPS, can provide reliable and stable direct voltage output to UPS.
For solving the problems of the technologies described above, the technical scheme that the present invention takes is as follows:
The accessory power supply of high power UPS, comprise: direct voltage inputs, alternating voltage inputs, for preventing the buffer circuit of current flowing backwards, rectification circuit, filter circuit, for direct voltage being converted to the semibridge system isolating switch translation circuit of high-frequency PWM alternating voltage, rectifier filter circuit, electric current and voltage sample circuit, feedback control circuit, PWM controller and the both-end inverse excitation type converter for powering to PWM controller, described direct voltage input is first successively through buffer circuit, filter circuit carries out isolation filter, then high-frequency PWM alternating voltage is converted to by semibridge system isolating switch translation circuit, isolation coupling is carried out again through rectifier filter circuit, output dc voltage after rectifying and wave-filtering, described electric current and voltage sample circuit judges process by after the voltage of the described direct voltage exported, current sample through feedback control circuit, then inputs PWM controller, controls semibridge system isolating switch translation circuit export DC voltage-stabilizing by PWM controller, described alternating voltage input input filter circuit filtering after rectifier circuit rectifies, the input of described both-end inverse excitation type converter is connected with the output of described filter circuit, accesses power supply to make both-end inverse excitation type converter, described both-end inverse excitation type converter has power supply output and is connected with the power input of PWM controller, powers for PWM controller to make both-end inverse excitation type converter.
Semibridge system isolating switch translation circuit of the present invention comprises the first power amplification circuit, second power amplification circuit, first transformer, first adjusts circuit, second adjusts circuit, 3rd switching tube and the 4th switching tube, described first transformer comprises the first armature winding, first secondary winding and second subprime winding, described PWM controller exports the pulse signal of two-way complementation respectively, one tunnel is successively through the first power amplification circuit, first armature winding, first secondary winding, first adjusts circuit rear drive the 3rd switching tube, another road is successively through the second power amplification circuit, first armature winding, second subprime winding, second adjusts circuit rear drive the 4th switching tube.
Described semibridge system isolating switch translation circuit of the present invention also comprises the first absorbing circuit, the second absorbing circuit, between the drain electrode that first absorbing circuit is connected to the 3rd switching tube and source electrode, between the drain electrode that the second absorbing circuit is connected to the 4th switching tube and source electrode.
Rectifier filter circuit of the present invention comprises the second transformer, the first rectifier diode, the second rectifier diode, LC oscillating circuit, described second transformer comprises the second armature winding, for the third time level winding, the 4th secondary winding, after described semibridge system isolating switch translation circuit exports high-frequency PWM alternating voltage to the second armature winding, one tunnel successively through third time level winding, the first rectifies, another road is successively through the 4th secondary winding, the second rectifies, and two-way rectification exports and all exports DC voltage-stabilizing by LC oscillating circuit.
Electric current and voltage sample circuit of the present invention comprise the primary current for detecting the second transformer current transformer, for output current is controlled the first comparator circuit, for output voltage control second comparator circuit, optical coupling isolation circuit, access the respective input mouth of described PWM controller after second primary windings connected in series of described current transformer and the second transformer, the DC voltage-stabilizing that described semibridge system isolating switch translation circuit exports compares through first, second comparator circuit correspondence the respective input mouth exporting described PWM controller to respectively.
The accessory power supply of high power UPS of the present invention also comprises secondary power supply, exports after the quiet secondary power supply of DC voltage-stabilizing that described semibridge system isolating switch translation circuit exports.
Both-end inverse excitation type converter of the present invention comprise the accessory power supply for starting described high power UPS power starting circuit, for closing power shutdown circuit, the both-end inverse-excitation type translation circuit of the accessory power supply of described power UPS, the first switching tube, second switch pipe that described both-end inverse-excitation type translation circuit comprises current source PWM IC and driven by this current source PWM IC, the drain electrode of described first switching tube is connected with the drain electrode of second switch pipe; The output of described power starting circuit, power shutdown circuit is all connected to the corresponding input control end of current source PWM IC, the accessory power supply of described high power UPS also comprises the starting switch of the accessory power supply for starting described high power UPS and the closing switch for the accessory power supply of cutting out described power UPS, the output of described secondary power supply is connected with the input of power starting circuit through starting switch, and the input of described power shutdown circuit is connected with closing switch.
The present invention is compared to the beneficial effect of prior art:
(1) the present invention has alternating voltage input, direct voltage input, improve reliability,, fluctuation ratio higher at input voltage is larger, power switch pipe is avoided to bear excessive voltage, current stress, and with secondary power supply for ups system is for providing the more stabilized supply voltage needed for UPS, there is provided stable power supply by both-end inverse excitation type converter for PWM controller again, make the work of this accessory power supply more stable; There is feedback control circuit, overvoltage, over-current detection are carried out to output, protect the reliably working of this accessory power supply; Wherein, two switching tubes of both-end inverse excitation type converter are series connection from circuit structure, and added driving pulse makes its colleague open, close simultaneously, so the voltage stress of single switching transistor can reduce half, thus improve reliability;
(2) startup of the present invention, powered-down circuit can start/close this accessory power supply as required, with saves energy, and the battery pack needed for the input of protection direct voltage.
Accompanying drawing explanation
Fig. 1 is the connection schematic block diagram of the accessory power supply of high power UPS of the present invention;
Fig. 2 is the circuit diagram of the semibridge system isolated converter of the accessory power supply of high power UPS of the present invention;
Fig. 3 is the pin winding diagram of the PWM controller of the accessory power supply of high power UPS of the present invention;
Fig. 4 is the circuit diagram of the both-end inverse excitation type converter of the accessory power supply of high power UPS of the present invention.
Embodiment
The accessory power supply of high power UPS as shown in Figure 1, it comprises: direct voltage inputs, alternating voltage inputs, for preventing the buffer circuit of current flowing backwards, rectification circuit, filter circuit, for direct voltage being converted to the semibridge system isolating switch translation circuit of high-frequency PWM alternating voltage, rectifier filter circuit, electric current and voltage sample circuit, feedback control circuit, PWM controller and the both-end inverse excitation type converter for powering to PWM controller, direct voltage input is first successively through buffer circuit, filter circuit carries out isolation filter, then high-frequency PWM alternating voltage is converted to by semibridge system isolating switch translation circuit, isolation coupling is carried out again through rectifier filter circuit, output dc voltage after rectifying and wave-filtering, electric current and voltage sample circuit judges process by after the voltage of the direct voltage exported, current sample through feedback control circuit, then inputs PWM controller, controls semibridge system isolating switch translation circuit export DC voltage-stabilizing by PWM controller, alternating voltage input input filter circuit filtering after rectifier circuit rectifies, the input of both-end inverse excitation type converter is connected with the output of filter circuit, accesses power supply to make both-end inverse excitation type converter, both-end inverse excitation type converter has power supply output and is connected with the power input of PWM controller, powers for PWM controller to make both-end inverse excitation type converter.
As shown in Figure 2, the accessory power supply of the present embodiment adopts double loop power supply to power, and a route 384V DC-voltage supply, namely accumulator battery voltage is powered, another route 220V ac power supply.When powering to UPS without 22V AC power, then by 384V DC-voltage supply.AC power is isolated by buffer circuit after isolation rectification circuit rectifies, prevent that commutating voltage is counter fills with accumulators group, then by filter circuit filtering, again by semibridge system isolating switch translation circuit, direct voltage is converted to high-frequency PWM alternating voltage, carrying out high frequency transformer isolation coupling, high-frequency rectification, High frequency filter through rectifier filter circuit again, exporting the direct voltage of+15V, for powering to the IGBT drive circuit of UPS; Feedback control circuit is transferred signals to after output voltage and current sample by electric current and voltage sample circuit, feedback control circuit is delivered to PWM controller after being dealt with by the signal transmitted and is controlled, and reaches output voltage and overcurrent, the overvoltage protection of stable output; + 15V the direct voltage exported is transformed into the direct current of+12V ,-12V ,+5V again by secondary power supply, for powering to the master board of UPS.
When ac power supply; alternating voltage input is connected to insurance F2; overvoltage protection is carried out through piezo-resistance VR1; the rectifier circuit rectifies formed through bridge rectifier diode BR1 is transformed into direct current; again through thermistor NTC1 surge current suppression; prevent powered on moment super-high-current to the impact of power supply, then be filtered into level and smooth direct current by the filter circuit that electric capacity C10 and electric capacity C11 forms, resistance R4, resistance R6 are the series average-voltage resistance of electric capacity C10, electric capacity C11.
When storage battery or commutation supply voltage, direct voltage input is connected to insurance F1, through the buffer circuit isolation that check diode D1 forms, then after thermistor NTC1 surge current suppression, the filter circuit consisted of electric capacity C10 and electric capacity C11 is filtered into level and smooth direct current.
As shown in Figure 2, semibridge system isolating switch translation circuit comprises the first power amplification circuit, second power amplification circuit, first transformer T2, first adjusts circuit, second adjusts circuit, 3rd switching tube Q3 and the 4th switching tube Q4, first transformer T2 comprises the first armature winding N1, first secondary winding N2 and second subprime winding N3, PWM controller U1 exports the pulse signal of two-way complementation respectively, one tunnel is successively through the first power amplification circuit, first armature winding N1, first secondary winding N2, first adjusts circuit rear drive the 3rd switching tube Q3, another road is successively through the second power amplification circuit, first armature winding N1, second subprime winding N3, second adjusts circuit rear drive the 4th switching tube Q4.Semibridge system isolating switch translation circuit also comprises the first absorbing circuit, the second absorbing circuit, between the drain electrode that the first absorbing circuit is connected to the 3rd switching tube Q3 and source electrode, between the drain electrode that the second absorbing circuit is connected to the 4th switching tube Q4 and source electrode.
Rectifier filter circuit comprises the second transformer T8, the first rectifier diode D2, second rectifier diode D3, LC oscillating circuit, second transformer T8 comprises the second armature winding N4, third time level winding N5, the 4th secondary winding N6, after semibridge system isolating switch translation circuit exports high-frequency PWM alternating voltage to the second armature winding N4, one tunnel is successively through third time level winding N5, the first rectifier diode D2 rectification, another road is successively through the 4th secondary winding N6, the second rectifier diode D3 rectification, and two-way rectification exports and all exports DC voltage-stabilizing by LC oscillating circuit.
Electric current and voltage sample circuit comprise the primary current for detecting the second transformer T8 Current Transmit 1, for output current is controlled the first comparator circuit, for output voltage control second comparator circuit, optical coupling isolation circuit, Current Transmit 1 accesses the respective input mouth of PWM controller after connecting with the second armature winding N4 of the second transformer T8, the DC voltage-stabilizing that semibridge system isolating switch translation circuit exports compares through first, second comparator circuit correspondence the respective input mouth exporting PWM controller to respectively.
The accessory power supply of this high power UPS also comprises secondary power supply, exports after the quiet secondary power supply of DC voltage-stabilizing that semibridge system isolating switch translation circuit exports.
Wherein, buffer circuit, rectification circuit, filter circuit, semibridge system isolating switch translation circuit, rectifier filter circuit, electric current and voltage sample circuit, feedback control circuit, PWM controller and secondary power supply form semibridge system isolated converter jointly.
The direct current that filter circuit exports is by the 3rd switching tube Q3 and the 4th switching tube Q4 co-controlling, third time level winding N5 and the 4th secondary winding N6 is transformed to through the second armature winding N4, the capacitance C16 of the second transformer T8 and Current Transmit 1, first secondary winding N2 is in parallel after the second rectifier diode D3 rectification with second subprime winding N5 through the first rectifier diode D2, then is filtered into the direct current of+15V through the LC oscillating circuit that inductance L 4 and electric capacity C23, electric capacity C26 electric capacity C28 form.Resistance R7 and electric capacity C19 forms the absorbing circuit of the first rectifier diode D2, and resistance R8, electric capacity C20 form the absorbing circuit of the second rectifier diode D3.Electric capacity C5, electric capacity C85 and diode D20 form first absorbing circuit of the 3rd switching tube Q3, and electric capacity C6, electric capacity C86 and diode D16 form second absorbing circuit of the 4th switching tube Q4.Magnetic bias is there is when capacitance C16 prevents semibridge system isolated converter from working, and the absorbing circuit of first, second valve electrode pipe D2, D3 can reduce the loss of first, second rectifier diode D2, D3, make first, second rectifier diode D2, D3 can safer work.
As shown in Figure 3, the PWM controller U1 of the present embodiment adopts voltage-type pulse-width modulation IC, and chip model is SG3525.SG3525 is Special electric die mould pulse-width modulation IC, favorable working performance, and outer member consumption is little, inner soft start, and its pin function is as follows:
1.Inv.input, pin 1: error amplifier reverse input end.In closed-loop system, this pin connects feedback signal.In open cycle system, this end is connected with compensating signal input (pin 9), can form follower.
2.Noninv.input, pin 2: error amplifier is input in the same way.In closed-loop system and open cycle system, this termination Setting signal.As required, between this end and compensating signal input (pin 9), access dissimilar feedback network, can the adjuster of the type such as composition, proportional integral and integration.
3.Sync, pin 3: the external synchronous signal input end of oscillator.This termination external sync pulse signal can realize synchronous with external circuit.
4.OSC.Output, pin 4: oscillator output end.
5.CT, pin 5: oscillator timing capacitor incoming end.
6.RT, pin 6: oscillator timing resistor incoming end.
7.Discharge, pin 7: oscillator discharge end.An external discharge resistance between this end and pin 5, forms discharge loop.
8.Soft-Start, pin 8: soft start capacitor incoming end.This end connects a soft start capacitor usually.
9.Compensation, pin 9:PWM comparator compensating signal input.Dissimilar feedback network is accessed between this end and pin 2, can the type regulators such as composition, proportional integral and integration.
10.Shutdown, pin 10: outside cut-off signals input.This termination high level Time Controller exports and is prohibited.This end can be connected with protective circuit, to realize error protection.
11.OutputA, pin 11: output terminals A.Pin 11 and pin 14 are two-way complementary output ends.
12.Ground, pin 12: signal ground.
13.Vc, pin 13: output stage biased voltage incoming end.
14.OutputB, pin 14: output B.Pin 14 and pin 11 are two-way complementary output ends.
15.Vcc, pin 15: bias supply incoming end.
16.Vref, pin 16: reference power supply output.The reference voltage that the exportable temperature stability of this end is fabulous.
The HF switch voltage control chip MC33167 that secondary power supply adopts, inside is integrated with PWM generator, error amplifier, switching tube and protective circuit.
The isolation of pulse drive signal is amplified: PWM controller U1 sends the pulse signal of two-way complementation, 11st pin of one route PWM controller U1 exports, through resistance R31, electric capacity C42, the first power amplification circuit that triode Q11 and triode Q12 forms carries out power amplification, 14th pin of another route PWM controller U1 exports, through resistance R25, electric capacity C44, the second power amplification circuit that triode Q9 and triode Q10 forms carries out power amplification, this two paths of signals is again after the first armature winding N1 of capacitance C4 and the first transformer T2 converts, the complementary signal that two-way amplified is exported respectively by second subprime winding N2 and third time level winding N3.The drive singal that second subprime winding N2 exports, adjusts after circuit adjusts through first of resistance R35, diode D11, resistance R37, triode Q14 and resistance R39 composition, drives the 3rd switching tube Q3; The drive singal that second subprime winding N3 exports, adjusts after circuit adjusts through second of resistance R36, diode D12, resistance R38, triode Q15 and resistance R40 composition, drives the 4th switching tube Q4.
The over-current detection elementary to the second transformer T8: the first armature winding N1 of Current Transmit 1 and the second transformer T8 is in series, for detecting the primary current of the second transformer T8, when this primary current exceedes setting electric current, the bridge rectifier diode that the primary current detection signal that Current Transmit 1 exports forms through diode D24, D25, D26, D27 carries out rectification, through resistance R5, resistance R33 and electric capacity C45, primary current detection signal is delivered to the 10th pin of PWM controller U1 again, this pin function is for closing output drive signal dedicated pin.The signal detected is set in the present embodiment and is greater than 0.7V then PWM controller U1 closedown drive pulse signal; when this semibridge system isolated converter works in abnormality; by protecting semibridge system isolated converter to primary current detection control, to make this accessory power supply reliable operation.
Output current ring detection control: resistance R9, resistance R10 are used for this accessory power supply and export galvanic current detecting, and the signal this detected delivers to the 5th pin of the second voltage comparator U16B through resistance R74; Resistance R81, resistance R82, electric capacity C61 and a reference source Q21 (adopting TL431) form an accurate reference voltage output, after resistance R72 and resistance R73 dividing potential drop, send the 6th pin of the second voltage comparator U16B again, jointly form the mistake current control to output current with compensating network electric capacity C56, resistance R67, electric capacity C59 and resistance R71; Second voltage comparator U16B and peripheral circuit thereof form the second comparator circuit.When output current overcurrent; 7th pin of the second voltage comparator U16B sends high level; optical coupling isolation circuit through diode D28 and optocoupler isolator U3, resistance R66, resistance R22, resistance R21 and electric capacity C38 composition delivers to the output of the internal error amplifier of PWM controller U1; direct controlling and driving signal pulse width; this semibridge system isolated converter is protected, to make the work of this accessory power supply more reliable when output short-circuit or output overloading.
Output-voltage loop detection control: after DC voltage dividing potential drop being exported to this accessory power supply by resistance R86, resistance R87 and resistance R75, signal is delivered to the 3rd pin of the first voltage comparator U16A; Resistance R81, resistance R82, electric capacity C61 and a reference source Q21 form reference voltage and export the 2nd pin delivering to the first voltage comparator U16A through resistance R83, jointly form output voltage control with compensating network electric capacity C57, electric capacity C63, resistance R85, electric capacity C62 and resistance R83; First voltage comparator U16A and peripheral circuit thereof form the first comparator circuit.When output voltage reaches setting voltage, 1st pin of the first voltage comparator U16A exports high level, optical coupling isolation circuit through diode D29 and optocoupler isolator U3, resistance R66, resistance R22, resistance R21 and electric capacity C38 composition delivers to the output of the internal error amplifier of PWM controller U1, control drive signal impulse width, make output voltage stabilization in the scope required, to make the work of this accessory power supply more reliable.
As shown in Figure 3, both-end inverse excitation type converter of the present invention comprise the accessory power supply for starting power UPS power starting circuit, for closing power shutdown circuit, the both-end inverse-excitation type translation circuit of the accessory power supply of power UPS, the first switching tube pipe Q1, second switch pipe Q2 that both-end inverse-excitation type translation circuit comprises current source PWM ICU15 and driven by this current source PWM ICU15, the drain electrode of the first switching tube Q1 is connected with the drain electrode of second switch pipe Q2; The output of power starting circuit, power shutdown circuit is all connected to the corresponding input control end of current source PWM ICU15, the accessory power supply of high power UPS also comprises the starting switch of the accessory power supply for starting this high power UPS and the closing switch for the accessory power supply of cutting out this high power UPS, the output of secondary power supply is connected with the input of power starting circuit through starting switch, and the input of power shutdown circuit is connected with closing switch.Just can start to accessory power supply after pressing starting switch; First can close UPS after pressing closing switch, then close this accessory power supply.
Two power switch pipes in both-end inverse-excitation type translation circuit are series connection from circuit structure, simultaneously added driving pulse opens, close simultaneously, so the voltage stress of single power switch pipe can reduce half, thus improve the reliability of this both-end inverse-excitation type translation circuit.
The current source PWM ICU15 of the present embodiment adopts model to be the control chip of UC3845, its input gets direct current CBUS+ from the filter circuit of semibridge system isolated converter, through check diode D23 again after thermistor NTC3 surge current suppression, one tunnel is through resistance R183, resistance R284 and resistance R185 delivers to optocoupler isolator U6 and prepares for starting power supply, another road is through resistance R110, resistance R111 and resistance R112 directly delivers to U15, improve the compensation ability of U15, also has road armature winding by high frequency transformer T3 after electric capacity C7 filtering, by the first switching tube Q1, 2nd Q2 Pulse Width Control, rectifier diode D9 rectification is coupled to through transformer T3, again by electric capacity C2, electric capacity C40 is filtered into direct voltage output Vbk, + 15V, power supply is to the PWM controller of semibridge system disconnector converter.
Power starting circuit: it is that battery BAT1 charges that secondary power supply output+5V power supply is connected to diode D33 and R88 through starting switch, battery provides voltage through triode Q18 and resistance R70, control the break-make of optocoupler isolator U5, U6 again through diode D30, resistance R69 and resistance R189, carry out startup power operation; Secondary power supply exports+12V power supply controls optocoupler isolator U5, U6 break-make through diode D31, resistance R76, resistance R69 and resistance R189, or the bypass error protection Power supply+12V power supply+12B of UPS controls the break-make of photoelectric coupling buffer circuit U5, U6 through diode D31, resistance R76, resistance R69 and resistance R189.Power starting circuit is guaranteed only to need just to start this accessory power supply when running at UPS, for ups system provides required power supply, avoid when not exchanging input and UPS does not run, accessory power supply has dissipated the electric energy in batteries, avoids prolonged cell to cross and puts.
Power shutdown circuit: closing switch exports powered-down signal SHUTDOWN after resistance R78, electric capacity C17, triode Q19, and a road and resistance R68, optocoupler isolator U4 and resistance R62 control the direct voltage output Vbk closing this both-end inverse excitation type converter; Another road forms through resistance R109, triode Q25, relay R Y1 and diode D46 and exports dry contact signal circuit, as the direct voltage output Vbk of this both-end inverse excitation type converter, provides dry contact signal simultaneously.After closing the direct voltage output Vbk of this both-end inverse excitation type converter, the direct voltage of this accessory power supply is also closed, and guarantees, when UPS runs, can close accessory power supply, saves energy, protection battery.This both-end inverse excitation type converter provides stable power supply for semibridge system disconnector converter, and semibridge system disconnector converter is more reliably worked when input voltage fluctuation is larger.
Above-described embodiment is only preferred embodiment of the present invention, is not used for limiting practical range of the present invention; I.e. all changes of doing according to content of the present invention and modification, all by the claims in the present invention scope required for protection is contained.
Claims (5)
1. the accessory power supply of high power UPS, it is characterized in that comprising: direct voltage inputs, alternating voltage inputs, for preventing the buffer circuit of current flowing backwards, rectification circuit, filter circuit, for direct voltage being converted to the semibridge system isolating switch translation circuit of high-frequency PWM alternating voltage, rectifier filter circuit, electric current and voltage sample circuit, feedback control circuit, PWM controller and the both-end inverse excitation type converter for powering to PWM controller, described direct voltage input is first successively through buffer circuit, filter circuit carries out isolation filter, then high-frequency PWM alternating voltage is converted to by semibridge system isolating switch translation circuit, isolation coupling is carried out again through rectifier filter circuit, output dc voltage after rectifying and wave-filtering, described electric current and voltage sample circuit judges process by after the voltage of the described direct voltage exported, current sample through feedback control circuit, then inputs PWM controller, controls semibridge system isolating switch translation circuit export DC voltage-stabilizing by PWM controller, described alternating voltage input input filter circuit filtering after rectifier circuit rectifies, the input of described both-end inverse excitation type converter is connected with the output of described filter circuit, accesses power supply to make both-end inverse excitation type converter, described both-end inverse excitation type converter has power supply output and is connected with the power input of PWM controller, powers for PWM controller to make both-end inverse excitation type converter, described semibridge system isolating switch translation circuit comprises the first power amplification circuit, second power amplification circuit, first transformer, first adjusts circuit, second adjusts circuit, 3rd switching tube, 4th switching tube, first absorbing circuit and the second absorbing circuit, described first transformer comprises the first armature winding, first secondary winding and second subprime winding, described PWM controller exports the pulse signal of two-way complementation respectively, one tunnel is successively through the first power amplification circuit, first armature winding, first secondary winding, first adjusts circuit rear drive the 3rd switching tube, another road is successively through the second power amplification circuit, first armature winding, second subprime winding, second adjusts circuit rear drive the 4th switching tube, between the drain electrode that first absorbing circuit is connected to the 3rd switching tube and source electrode, between the drain electrode that the second absorbing circuit is connected to the 4th switching tube and source electrode.
2. the accessory power supply of high power UPS according to claim 1, it is characterized in that: described rectifier filter circuit comprises the second transformer, first rectifier diode, second rectifier diode, LC oscillating circuit, described second transformer comprises the second armature winding, level winding for the third time, 4th secondary winding, after described semibridge system isolating switch translation circuit exports high-frequency PWM alternating voltage to the second armature winding, one tunnel is successively through third time level winding, first rectifies, another road is successively through the 4th secondary winding, second rectifies, two-way rectification exports and all exports DC voltage-stabilizing by LC oscillating circuit.
3. the accessory power supply of high power UPS according to claim 2, it is characterized in that: described electric current and voltage sample circuit comprises the current transformer of the primary current for detecting the second transformer, for the first comparator circuit controlled output current, for to output voltage control second comparator circuit, optical coupling isolation circuit, the respective input mouth of described PWM controller is accessed after second primary windings connected in series of described current transformer and the second transformer, the DC voltage-stabilizing that described semibridge system isolating switch translation circuit exports is respectively through first, second comparator circuit correspondence compares the respective input mouth exporting described PWM controller to.
4. the accessory power supply of the high power UPS according to any one of claim 1-3, is characterized in that: the accessory power supply of described high power UPS also comprises secondary power supply, and the DC voltage-stabilizing that described rectifier filter circuit exports exports after secondary power supply.
5. the accessory power supply of high power UPS according to claim 4, it is characterized in that: described both-end inverse excitation type converter comprise the accessory power supply for starting described high power UPS power starting circuit, for closing power shutdown circuit, the both-end inverse-excitation type translation circuit of the accessory power supply of described high power UPS, the first switching tube, second switch pipe that described both-end inverse-excitation type translation circuit comprises current source PWM IC and driven by this current source PWM IC, the drain electrode of described first switching tube is connected with the drain electrode of second switch pipe; The output of described power starting circuit, power shutdown circuit is all connected to the corresponding input control end of current source PWM IC, the accessory power supply of described high power UPS also comprises the starting switch of the accessory power supply for starting described high power UPS and the closing switch for the accessory power supply of cutting out described power UPS, the output of described secondary power supply is connected with the input of power starting circuit through starting switch, and the input of described power shutdown circuit is connected with closing switch.
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| CN109149950B (en) * | 2018-11-01 | 2024-02-06 | 鞍山雷盛电子有限公司 | High-precision integrated high-frequency high-voltage power supply |
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| CN115032434A (en) * | 2022-06-08 | 2022-09-09 | 北京星辰空间科技有限公司 | Detection circuit with magnetic isolation function |
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| CN102832694A (en) | 2012-12-19 |
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