CN202759283U - Auxiliary power supply for high-power UPS - Google Patents
Auxiliary power supply for high-power UPS Download PDFInfo
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- CN202759283U CN202759283U CN 201220410409 CN201220410409U CN202759283U CN 202759283 U CN202759283 U CN 202759283U CN 201220410409 CN201220410409 CN 201220410409 CN 201220410409 U CN201220410409 U CN 201220410409U CN 202759283 U CN202759283 U CN 202759283U
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Abstract
The utility model discloses an auxiliary power supply for a high-power UPS. The auxiliary power supply comprises a DC voltage input, an AC voltage input, an isolating circuit used for preventing current flowing backwards, a rectifying circuit, a filtering circuit, a half-bridge isolating switch conversion circuit, a high-frequency rectifying and filtering circuit, a voltage/current sampling circuit, a feedback control circuit, a PWM controller and a double-ended flyback converter, wherein a DC voltage is input to the isolating circuit and the filtering circuit in sequence for isolation and filtration firstly, is converted into a high-frequency PWM AC voltage through the half-bridge isolating switch conversion circuit, and then is output as a DC voltage after isolated coupling, rectification and filtration through the high-frequency rectifying and filtering circuit; the half-bridge isolating switch conversion circuit is controlled by the PWM controller to output a DC stabilized voltage; an input end of the double-ended flyback converter is interconnected with an output end of the filtering circuit so as to access the double-ended flyback converter to a power supply; and the double-ended flyback converter supplies power for the PWM controller. The auxiliary power supply can supply the reliable and stable output of DC voltage for the UPS.
Description
Technical field
The utility model relates to ups power, is 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 the high reliability future development, and the triggering drive circuit of the logic control circuit among the UPS, module all needs to have the dc auxiliary supply power supply, so dc auxiliary supply must be very reliable.
But, all be to be realized by simple single-ended reverse exciting translation circuit to the UPS power supply with accessory power supply generally, the accessory power supply that is comprised of the single-ended reverse exciting translation circuit is when input voltage is higher, power switch pipe bears higher voltage, current stress, damage easily, and when input voltage fluctuation is large, cause easily output unstable, finally cause the UPS fault.
The utility model content
Technical problem to be solved in the utility model just provides 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 utility model is taked is as follows:
The accessory power supply of high power UPS, comprise: the direct voltage input, the alternating voltage input, be used for preventing the buffer circuit of current flowing backwards, rectification circuit, filter circuit, be used for direct voltage is converted to the semibridge system isolating switch translation circuit of high-frequency PWM alternating voltage, rectifier filter circuit, the electric current and voltage sample circuit, feedback control circuit, PWM controller and be used for both-end inverse excitation type converter to the power supply of PWM controller, described direct voltage input is first successively through buffer circuit, filter circuit carries out isolation filter, then convert the high-frequency PWM alternating voltage to by semibridge system isolating switch translation circuit, carry out isolation coupling through rectifier filter circuit again, output dc voltage behind the rectifying and wave-filtering; The voltage of the described direct voltage that described electric current and voltage sample circuit will be exported, current sample are judged processing by feedback control circuit, then input the PWM controller, by PWM controller control semibridge system isolating switch translation circuit output DC voltage-stabilizing; Described alternating voltage input input filter circuit filtering after the rectification circuit rectification; The input of described both-end inverse excitation type converter links to each other with the output of described filter circuit, so that both-end inverse excitation type converter access power supply; Described both-end inverse excitation type converter has the power supply output and links to each other with the power input of PWM controller, so that the both-end inverse excitation type converter is the power supply of PWM controller.
Semibridge system isolating switch translation circuit described in the utility model comprises the first power amplification circuit, the second power amplification circuit, the first transformer, first circuit of adjusting, second circuit of adjusting, the 3rd switching tube and the 4th switching tube, described the first transformer comprises the first armature winding, the first secondary winding and second subprime winding, described PWM controller is exported respectively the pulse signal of two-way complementation, one the tunnel successively through the first power amplification circuit, the first armature winding, the first secondary winding, first circuit rear drive the 3rd switching tube of adjusting, another road is successively through the second power amplification circuit, the first armature winding, the second subprime winding, second circuit rear drive the 4th switching tube of adjusting.
Described semibridge system isolating switch translation circuit described in the utility model also comprises the first absorbing circuit, the second absorbing circuit, the first absorbing circuit is connected between the drain electrode and source electrode of the 3rd switching tube, and the second absorbing circuit is connected between the drain electrode and source electrode of the 4th switching tube.
Rectifier filter circuit described in the utility model comprises the second transformer, the first rectifier diode, the second rectifier diode, LC oscillating circuit, described the second transformer comprises the second armature winding, level winding, the 4th secondary winding for the third time, behind described semibridge system isolating switch translation circuit output high-frequency PWM alternating voltage to the second armature winding, one the tunnel successively through level winding, the first rectifies for the third time, another road is successively through the 4th secondary winding, the second rectifies, and two-way rectification output is all by LC oscillating circuit output DC voltage-stabilizing.
Electric current and voltage sample circuit described in the utility model comprises the current transformer for detection of the primary current of the second transformer, be used for the first comparator circuit to output current control, be used for output voltage control the second comparator circuit, optical coupling isolation circuit, the respective input mouth of the described PWM controller of access after described current transformer is connected with the second armature winding of the second transformer, the DC voltage-stabilizing of described semibridge system isolating switch translation circuit output is respectively through first, the second comparator circuit correspondence compares the respective input mouth that exports described PWM controller to.
The accessory power supply of high power UPS described in the utility model also comprises secondary power supply, exports behind the quiet secondary power supply of DC voltage-stabilizing of described semibridge system isolating switch translation circuit output.
Both-end inverse excitation type converter described in the utility model comprises power starting circuit be used to the accessory power supply that starts described high power UPS, be used for closing power shutdown circuit, the both-end inverse-excitation type translation circuit of the accessory power supply of described power UPS, described both-end inverse-excitation type translation circuit comprises current source PWM IC and the first switching tube, the second switch pipe that are driven by this current source PWM IC, and the drain electrode of described the first switching tube links to each other with the drain electrode of second switch pipe; The output of described power starting circuit, power shutdown circuit all links to each other with the corresponding input control end of current source PWM IC, the accessory power supply of described high power UPS also comprises be used to the starting switch of the accessory power supply that starts described high power UPS and is used for cutting out the closing switch of the accessory power supply of described power UPS, the output of described secondary power supply links to each other with the input of power starting circuit through starting switch, and the input of described power shutdown circuit links to each other with closing switch.
The utility model is than the beneficial effect of prior art:
(1) the utlity model has alternating voltage input, direct voltage input, improved reliability, in the situation higher at input voltage, that fluctuation ratio is larger, avoid power switch pipe to bear excessive voltage, current stress, and with secondary power supply for ups system for the required more stabilized supply voltage of UPS is provided, again by the both-end inverse excitation type converter for the PWM controller provides stable power supply, make the work of this accessory power supply more stable; Have feedback control circuit, overvoltage, over-current detection are carried out in output, protect the reliably working of this accessory power supply; Wherein, two switching tubes of both-end inverse excitation type converter are connected from circuit structure, and added driving pulse makes its colleague open, close simultaneously, so the voltage stress of single switching transistor can reduce half, thereby improve reliability;
(2) startup of the present utility model, powered-down circuit can start/close this accessory power supply as required, with saves energy, and the required battery pack of protection direct voltage input.
Description of drawings
Fig. 1 is the connection schematic block diagram of the accessory power supply of the utility model high power UPS;
Fig. 2 is the circuit diagram of semibridge system isolated converter of the accessory power supply of the utility model high power UPS;
Fig. 3 is the pin winding diagram of PWM controller of the accessory power supply of the utility model high power UPS;
Fig. 4 is the circuit diagram of both-end inverse excitation type converter of the accessory power supply of the utility model high power UPS.
Embodiment
The accessory power supply of high power UPS as shown in Figure 1, it comprises: the direct voltage input, the alternating voltage input, be used for preventing the buffer circuit of current flowing backwards, rectification circuit, filter circuit, be used for direct voltage is converted to the semibridge system isolating switch translation circuit of high-frequency PWM alternating voltage, rectifier filter circuit, the electric current and voltage sample circuit, feedback control circuit, PWM controller and be used for both-end inverse excitation type converter to the power supply of PWM controller, the direct voltage input is first successively through buffer circuit, filter circuit carries out isolation filter, then convert the high-frequency PWM alternating voltage to by semibridge system isolating switch translation circuit, carry out isolation coupling through rectifier filter circuit again, output dc voltage behind the rectifying and wave-filtering; The electric current and voltage sample circuit is judged processing with voltage, the current sample of the direct voltage of output by feedback control circuit, then inputs the PWM controller, by PWM controller control semibridge system isolating switch translation circuit output DC voltage-stabilizing; Alternating voltage input input filter circuit filtering after the rectification circuit rectification; The input of both-end inverse excitation type converter links to each other with the output of filter circuit, so that both-end inverse excitation type converter access power supply; The both-end inverse excitation type converter has the power supply output and links to each other with the power input of PWM controller, so that the both-end inverse excitation type converter is the power supply of PWM controller.
As shown in Figure 2, the accessory power supply of present embodiment adopts the double loop power supply power supply, a route 384V DC-voltage supply, i.e. accumulator battery voltage power supply, another route 220V ac power supply.When powering to UPS without the 22V AC power, then by the 384V DC-voltage supply.AC power is isolated by buffer circuit after the rectification of isolation rectification circuit, prevent the anti-accumulators group of filling with of commutating voltage, then by filter circuit filtering, again by semibridge system isolating switch translation circuit, convert direct voltage to the high-frequency PWM alternating voltage, carry out high frequency transformer isolation coupling, high-frequency rectification, High frequency filter through rectifier filter circuit again, the direct voltage of output+15V is used for power supply to the IGBT drive circuit of UPS; Transfer signals to feedback control circuit by the electric current and voltage sample circuit after to output voltage and current sample, deliver to the PWM controller after feedback control circuit deals with the signal that transmits and control, reach the output voltage of stable output and overcurrent, overvoltage protection; Output+the 15V direct voltage again by secondary power supply be transformed into+12V ,-12V ,+direct current of 5V, be used for power supply to the master board of UPS.
When ac power supply; the alternating voltage input is connected to insurance F2; carry out overvoltage protection through piezo-resistance VR1; the rectification circuit rectifying conversion that forms through bridge rectifier diode BR1 becomes direct current; again through thermistor NTC1 surge current suppression; prevent the powered on moment super-high-current to the impact of power supply, the filter circuit that forms by capacitor C 10 and capacitor C 11 again is filtered into level and smooth direct current, and resistance R 4, resistance R 6 are the series average-voltage resistance of capacitor C 10, capacitor C 11.
When storage battery or commutation supply voltage, the direct voltage input is connected to insurance F1, through the buffer circuit isolation that check diode D1 forms, behind thermistor NTC1 surge current suppression, the filter circuit that forms by capacitor C 10 and capacitor C 11 is filtered into level and smooth direct current again.
As shown in Figure 2, semibridge system isolating switch translation circuit comprises the first power amplification circuit, the second power amplification circuit, the first transformer T2, first circuit of adjusting, second circuit of adjusting, the 3rd switching tube Q3 and the 4th switching tube Q4, the first transformer T2 comprises the first armature winding N1, the first secondary winding N2 and second subprime winding N3, PWM controller U1 exports respectively the pulse signal of two-way complementation, one the tunnel successively through the first power amplification circuit, the first armature winding N1, the first secondary winding N2, first circuit rear drive the 3rd switching tube Q3 that adjusts, another road is successively through the second power amplification circuit, the first armature winding N1, second subprime winding N3, second circuit rear drive the 4th switching tube Q4 that adjusts.Semibridge system isolating switch translation circuit also comprises the first absorbing circuit, the second absorbing circuit, and the first absorbing circuit is connected between the drain electrode and source electrode of the 3rd switching tube Q3, and the second absorbing circuit is connected between the drain electrode and source electrode of the 4th switching tube Q4.
Rectifier filter circuit comprises the second transformer T8, the first rectifier diode D2, the second rectifier diode D3, LC oscillating circuit, the second transformer T8 comprises the second armature winding N4, for the third time level winding N5, the 4th secondary winding N6, behind semibridge system isolating switch translation circuit output high-frequency PWM alternating voltage to the second armature winding N4, one the tunnel successively through for the 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 output is all by LC oscillating circuit output DC voltage-stabilizing.
The electric current and voltage sample circuit comprises Current Transmit 1 for detection of the primary current of the second transformer T8, be used for to output current control the first comparator circuit, be used for output voltage control the second comparator circuit, optical coupling isolation circuit, the respective input mouth of access PWM controller after Current Transmit 1 is connected with the second armature winding N4 of the second transformer T8, the DC voltage-stabilizing of semibridge system isolating switch translation circuit output compares the respective input mouth that exports the PWM controller to through first, second comparator circuit correspondence respectively.
The accessory power supply of this high power UPS also comprises secondary power supply, exports behind the quiet secondary power supply of DC voltage-stabilizing of semibridge system isolating switch translation circuit output.
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 consist of the semibridge system isolated converter jointly.
The direct current of filter circuit output is by the 3rd switching tube Q3 and the 4th switching tube Q4 co-controlling, the second armature winding N4, capacitance C16 and Current Transmit 1 through the second transformer T8 transform to for the third time level winding N5 and the 4th secondary winding N6, the 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, and the LC oscillating circuit that forms through inductance L 4 and capacitor C 23, capacitor C 26 capacitor C 28 again is filtered into+direct current of 15V.Resistance R 7 and capacitor C 19 form the absorbing circuit of the first rectifier diode D2, and resistance R 8, capacitor C 20 form the absorbing circuit of the second rectifier diode D3.Capacitor C 5, capacitor C 85 and diode D20 form the first absorbing circuit of the 3rd switching tube Q3, and capacitor C 6, capacitor C 86 and diode D16 form the second absorbing circuit of the 4th switching tube Q4.Magnetic bias occurs in capacitance C16 when preventing the work of semibridge system isolated converter, and the absorbing circuit of first, second valve electrode pipe D2, D3 can reduce the loss of first, second rectifier diode D2, D3, makes first, second rectifier diode D2, the D3 can safer work.
As shown in Figure 3, the PWM controller U1 of present embodiment adopts voltage-type pulse-width modulation IC, and the chip model is SG3525.SG3525 is Special electric die mould pulse-width modulation IC, favorable working performance, and the outer member consumption is little, inner soft start, 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 links to each other with compensating signal input (pin 9), can consist of follower.
2.Noninv.input pin 2: error amplifier is input in the same way.In closed-loop system and open cycle system, the given signal of this termination.As required, the dissimilar feedback network of access between this end and compensating signal input (pin 9) can composition, the adjuster of the types such as proportional integral and integration.
3.Sync, pin 3: the external synchronous signal input end of oscillator.This termination external sync pulse signal can be realized with external circuit synchronous.
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 the pin 5 consists of 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.The dissimilar feedback network of access between this end and pin 2 can composition, the type adjustment devices such as proportional integral and integration.
10.Shutdown, pin 10: outside cut-off signals input.This termination high level Time Controller output is under an embargo.This end can link to each other with protective circuit, to realize error protection.
11.Output A, 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.Output B, 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 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, the 11st pin output of one route PWM controller U1, through resistance R 31, capacitor C 42, the first power amplification circuit that triode Q11 and triode Q12 form carries out power amplification, the 14th pin output of another route PWM controller U1, through resistance R 25, capacitor C 44, the second power amplification circuit that triode Q9 and triode Q10 form carries out power amplification, this two paths of signals again after the first armature winding N1 of capacitance C4 and the first transformer T2 carries out conversion, by second subprime winding N2 and for the third time a level winding N3 export respectively the complementary signal that two-way has amplified.The driving signal of second subprime winding N2 output through first adjusting after circuit adjusts that resistance R 35, diode D11, resistance R 37, triode Q14 and resistance R 39 form, drives the 3rd switching tube Q3; The driving signal of second subprime winding N3 output through second adjusting after circuit adjusts that resistance R 36, diode D12, resistance R 38, triode Q15 and resistance R 40 form, drives the 4th switching tube Q4.
To the elementary over-current detection of the second transformer T8: the first armature winding N1 of Current Transmit 1 and the second transformer T8 is in series, primary current for detection of the second transformer T8, when surpassing, this primary current sets electric current, the primary current detection signal of Current Transmit 1 output carries out rectification through the bridge rectifier diode that diode D24, D25, D26, D27 form, through resistance R 5, resistance R 33 and capacitor C 45 the primary current detection signal is delivered to the 10th pin of PWM controller U1 again, this pin function is for closing the output drive signal dedicated pin.Arrange in the present embodiment signal detect greater than 0.7V then PWM controller U1 close drive pulse signal; when this semibridge system isolated converter works in abnormality; by being detected control, primary current protects the semibridge system isolated converter, so that this accessory power supply reliable operation.
The output current ring detects control: resistance R 9, resistance R 10 are used for the current detecting of this accessory power supply output DC, this signal that detects are delivered to the 5th pin of second voltage comparator U16B through resistance R 74; Resistance R 81, resistance R 82, capacitor C 61 and a reference source Q21 (adopting TL431) form the reference voltage output of a precision, after resistance R 72 and resistance R 73 dividing potential drops, send again the 6th pin of second voltage comparator U16B, with compensating network capacitor C 56, resistance R 67, capacitor C 59 and the resistance R 71 common mistake current control that form output current; Second voltage comparator U16B and peripheral circuit thereof consist of the second comparator circuit.When the output current overcurrent; the 7th pin of second voltage comparator U16B is sent high level; deliver to the output of the internal error amplifier of PWM controller U1 through the optical coupling isolation circuit of diode D28 and optocoupler isolator U3, resistance R 66, resistance R 22, resistance R 21 and capacitor C 38 compositions; the direct controlling and driving signal pulse width; when output short-circuit or output overloading, protect this semibridge system isolated converter, so that the work of this accessory power supply is more reliable.
Output-voltage loop detects control: after resistance R 86, resistance R 87 and 75 pairs of this accessory power supply output DCs of resistance R voltage dividing potential drop, signal is delivered to the 3rd pin of the first voltage comparator U16A; Resistance R 81, resistance R 82, capacitor C 61 and a reference source Q21 form reference voltage and export the 2nd pin of delivering to the first voltage comparator U16A through resistance R 83, jointly form output voltage control with compensating network capacitor C 57, capacitor C 63, resistance R 85, capacitor C 62 and resistance R 83; The first voltage comparator U16A and peripheral circuit thereof consist of the first comparator circuit.When output voltage reaches setting voltage, the 1st pin output high level of the first voltage comparator U16A, deliver to the output of the internal error amplifier of PWM controller U1 through the optical coupling isolation circuit of diode D29 and optocoupler isolator U3, resistance R 66, resistance R 22, resistance R 21 and capacitor C 38 compositions, control drive signal impulse width, make output voltage stabilization in the scope that requires, so that the work of this accessory power supply is more reliable.
As shown in Figure 3, the utility model both-end inverse excitation type converter comprises power starting circuit for the accessory power supply of starting power UPS, be used for closing power shutdown circuit, the both-end inverse-excitation type translation circuit of the accessory power supply of power UPS, both-end inverse-excitation type translation circuit comprises current source PWM IC U15 and the first switching tube pipe Q1, the second switch pipe Q2 that are driven by this current source PWM IC U15, and the drain electrode of the first switching tube Q1 links to each other with the drain electrode of second switch pipe Q2; The output of power starting circuit, power shutdown circuit all links to each other with the corresponding input control end of current source PWM IC U15, the accessory power supply of high power UPS also comprises for the starting switch of the accessory power supply that starts this high power UPS and is used for cutting out the closing switch of the accessory power supply of this high power UPS, the output of secondary power supply links to each other with the input of power starting circuit through starting switch, and the input of power shutdown circuit links to each other with closing switch.After pressing starting switch, just can start to accessory power supply; After pressing closing switch, can close first UPS, close again this accessory power supply.
Two power switch pipes in the both-end inverse-excitation type translation circuit are connected from circuit structure, added driving pulse is to open simultaneously, close simultaneously, so the voltage stress of single power switch pipe can reduce half, thereby improved the reliability of this both-end inverse-excitation type translation circuit.
It is the control chip of UC3845 that the current source PWM IC U15 of present embodiment adopts model, its input is got direct current CBUS+ from the filter circuit of semibridge system isolated converter, through check diode D23 again behind thermistor NTC3 surge current suppression, one the tunnel through resistance R 183, resistance R 284 and resistance R 185 are delivered to optocoupler isolator U6 and are prepared for starting power supply, another road is through resistance R 110, resistance R 111 and resistance R 112 are directly delivered to U15, improve the compensation ability of U15, also have one the tunnel after capacitor C 7 filtering the armature winding by high frequency transformer T3, by the first switching tube Q1, the 2nd Q2 pulse control, be coupled to rectifier diode D9 rectification through transformer T3, again by capacitor C 2, capacitor C 40 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 battery BAT1 charging 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 R 70, through the break-make of diode D30, resistance R 69 and resistance R 189 control optocoupler isolator U5, U6, start power operation again; Secondary power supply output+12V power supply is through the break-make of diode D31, resistance R 76, resistance R 69 and resistance R 189 control optocoupler isolator U5, U6, or the bypass error protection Power supply of UPS+12V power supply+12B is through the break-make of diode D31, resistance R 76, resistance R 69 and resistance R 189 control photoelectric coupling buffer circuit U5, U6.Power starting circuit guarantees only just to start this accessory power supply when UPS need to move, for ups system provides required power supply, avoid when not exchanging input and UPS and do not move, the accessory power supply electric energy on the batteries that dissipated is avoided long-term battery to cross and is put.
Power shutdown circuit: closing switch output powered-down signal SHUTDOWN is behind resistance R 78, capacitor C 17, triode Q19, and one the tunnel closes the direct voltage output Vbk of this both-end inverse excitation type converter with resistance R 68, optocoupler isolator U4 and resistance R 62 controls; Another road consists of output dry contact signal circuit through resistance R 109, triode Q25, relay R Y1 and diode D46, when the direct voltage output Vbk of this both-end inverse excitation type converter, provides simultaneously the dry contact signal.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 can close accessory power supply when UPS moves saves energy, protection battery.This both-end inverse excitation type converter works the semibridge system disconnector converter for the semibridge system disconnector converter provides stable power supply more reliably when input voltage fluctuation is larger.
Above-described embodiment is preferred embodiment of the present utility model only, is not to limit practical range of the present utility model; Be all variation and modification of doing according to the utility model content, all contained by the utility model claim scope required for protection.
Claims (7)
1. the accessory power supply of high power UPS, it is characterized in that comprising: the direct voltage input, the alternating voltage input, be used for preventing the buffer circuit of current flowing backwards, rectification circuit, filter circuit, be used for direct voltage is converted to the semibridge system isolating switch translation circuit of high-frequency PWM alternating voltage, rectifier filter circuit, the electric current and voltage sample circuit, feedback control circuit, PWM controller and be used for both-end inverse excitation type converter to the power supply of PWM controller, described direct voltage input is first successively through buffer circuit, filter circuit carries out isolation filter, then convert the high-frequency PWM alternating voltage to by semibridge system isolating switch translation circuit, carry out isolation coupling through rectifier filter circuit again, output dc voltage behind the rectifying and wave-filtering; The voltage of the described direct voltage that described electric current and voltage sample circuit will be exported, current sample are judged processing by feedback control circuit, then input the PWM controller, by PWM controller control semibridge system isolating switch translation circuit output DC voltage-stabilizing; Described alternating voltage input input filter circuit filtering after the rectification circuit rectification; The input of described both-end inverse excitation type converter links to each other with the output of described filter circuit, so that both-end inverse excitation type converter access power supply; Described both-end inverse excitation type converter has the power supply output and links to each other with the power input of PWM controller, so that the both-end inverse excitation type converter is the power supply of PWM controller.
2. the accessory power supply of high power UPS according to claim 1, it is characterized in that: described semibridge system isolating switch translation circuit comprises the first power amplification circuit, the second power amplification circuit, the first transformer, first circuit of adjusting, second circuit of adjusting, the 3rd switching tube and the 4th switching tube, described the first transformer comprises the first armature winding, the first secondary winding and second subprime winding, described PWM controller is exported respectively the pulse signal of two-way complementation, one the tunnel successively through the first power amplification circuit, the first armature winding, the first secondary winding, first circuit rear drive the 3rd switching tube of adjusting, another road is successively through the second power amplification circuit, the first armature winding, the second subprime winding, second circuit rear drive the 4th switching tube of adjusting.
3. the accessory power supply of high power UPS according to claim 2, it is characterized in that: described semibridge system isolating switch translation circuit also comprises the first absorbing circuit, the second absorbing circuit, the first absorbing circuit is connected between the drain electrode and source electrode of the 3rd switching tube, and the second absorbing circuit is connected between the drain electrode and source electrode of the 4th switching tube.
4. the accessory power supply of high power UPS according to claim 3, it is characterized in that: described rectifier filter circuit comprises the second transformer, the first rectifier diode, the second rectifier diode, the LC oscillating circuit, described the second transformer comprises the second armature winding, for the third time the level winding, the 4th secondary winding, behind described semibridge system isolating switch translation circuit output high-frequency PWM alternating voltage to the second armature winding, one the tunnel successively through for the third time the level winding, the first rectifies, another road is successively through the 4th secondary winding, the second rectifies, two-way rectification output are all by LC oscillating circuit output DC voltage-stabilizing.
5. the accessory power supply of high power UPS according to claim 4, it is characterized in that: described electric current and voltage sample circuit comprises the current transformer for detection of the primary current of the second transformer, be used for the first comparator circuit to output current control, be used for output voltage control the second comparator circuit, optical coupling isolation circuit, the respective input mouth of the described PWM controller of access after described current transformer is connected with the second armature winding of the second transformer, the DC voltage-stabilizing of described semibridge system isolating switch translation circuit output is respectively through first, the second comparator circuit correspondence compares the respective input mouth that exports described PWM controller to.
6. the accessory power supply of each described high power UPS according to claim 1-5, it is characterized in that: the accessory power supply of described high power UPS also comprises secondary power supply, the DC voltage-stabilizing of described semibridge system isolating switch translation circuit output is exported behind secondary power supply.
7. the accessory power supply of high power UPS according to claim 6, it is characterized in that: described both-end inverse excitation type converter comprises power starting circuit be used to the accessory power supply that starts described high power UPS, be used for closing power shutdown circuit, the both-end inverse-excitation type translation circuit of the accessory power supply of described power UPS, described both-end inverse-excitation type translation circuit comprises current source PWM IC and the first switching tube, the second switch pipe that are driven by this current source PWM IC, and the drain electrode of described the first switching tube links to each other with the drain electrode of second switch pipe; The output of described power starting circuit, power shutdown circuit all links to each other with the corresponding input control end of current source PWM IC, the accessory power supply of described high power UPS also comprises be used to the starting switch of the accessory power supply that starts described high power UPS and is used for cutting out the closing switch of the accessory power supply of described power UPS, the output of described secondary power supply links to each other with the input of power starting circuit through starting switch, and the input of described power shutdown circuit links to each other with closing switch.
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| CN 201220410409 CN202759283U (en) | 2012-08-17 | 2012-08-17 | Auxiliary power supply for high-power UPS |
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| CN 201220410409 CN202759283U (en) | 2012-08-17 | 2012-08-17 | Auxiliary power supply for high-power UPS |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102832694A (en) * | 2012-08-17 | 2012-12-19 | 佛山市柏克新能科技股份有限公司 | Auxiliary power supply of high-power UPS (uninterrupted power supply) |
| CN103944460A (en) * | 2014-05-15 | 2014-07-23 | 昆山华恒焊接股份有限公司 | Direct-current motor drive circuit |
| CN105024444A (en) * | 2015-07-10 | 2015-11-04 | 张晓军 | Metro weak current integrated UPS bypass control system |
| CN107124111A (en) * | 2017-06-20 | 2017-09-01 | 苏州工业职业技术学院 | A kind of novel high-power semibridge system exports rearrangeable switch power supply |
-
2012
- 2012-08-17 CN CN 201220410409 patent/CN202759283U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102832694A (en) * | 2012-08-17 | 2012-12-19 | 佛山市柏克新能科技股份有限公司 | Auxiliary power supply of high-power UPS (uninterrupted power supply) |
| CN102832694B (en) * | 2012-08-17 | 2015-11-25 | 佛山市柏克新能科技股份有限公司 | The accessory power supply of high power UPS |
| CN103944460A (en) * | 2014-05-15 | 2014-07-23 | 昆山华恒焊接股份有限公司 | Direct-current motor drive circuit |
| CN105024444A (en) * | 2015-07-10 | 2015-11-04 | 张晓军 | Metro weak current integrated UPS bypass control system |
| CN107124111A (en) * | 2017-06-20 | 2017-09-01 | 苏州工业职业技术学院 | A kind of novel high-power semibridge system exports rearrangeable switch power supply |
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