CN106549483B - Double-output power supplier and its backup method - Google Patents
Double-output power supplier and its backup method Download PDFInfo
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- CN106549483B CN106549483B CN201510607160.7A CN201510607160A CN106549483B CN 106549483 B CN106549483 B CN 106549483B CN 201510607160 A CN201510607160 A CN 201510607160A CN 106549483 B CN106549483 B CN 106549483B
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Abstract
A kind of double-output power supplier includes: the first, second circuit of power factor correction, output circuit and DC-DC converter.First circuit of power factor correction framework is to provide first target voltage, and the second circuit of power factor correction framework is to provide the second target voltage.Second target voltage is less than first target voltage.When the output regular supply of the first circuit of power factor correction, output circuit provides output voltage based on the output of the first circuit of power factor correction.When the output of the first circuit of power factor correction due to the first AC power source is abnormal less than the output of the second circuit of power factor correction when, output circuit provides output voltage to DC-DC converter based on the output of the second circuit of power factor correction, generates load voltage for it.It so can reach and reduce volume and have the function of redundant.
Description
Technical field
System of the present invention provides a kind of power supply unit, especially means a kind of double-output power supplier and its backup method.
Background technique
It will use power supply unit there are many electronic device, arithmetic system etc. now to provide stable electric power, allow electronics
Device or arithmetic system etc. can operate for a long time, are avoided that and cause electronic device or operation system because alternating current source is unstable
System etc. is unable to run or damages.
The single input power of power supply unit polyphyly in the streets, usually connects to alternating current, to convert the exchange of alternating current
Power supply is stable DC source, is run with electronic devices.In addition, in the streets also have two-output impulse generator power supply unit,
Input terminal system inputs the alternating current of identical voltage respectively or inputs an alternating current and a direct current respectively, also therefore dual input power supply
Power supply unit goes out of the port with lose-lose, and each output end then corresponds respectively to the power supply of input terminal, to export corresponding output electricity respectively
Power.Such as when this two-output impulse generator power supply unit identical AC power source of input, then each output end distinguishes identical output electricity
Power；If input terminal is respectively an alternating current and a direct current, an output end is then corresponding to exchange one output power of electricity output, separately
One output end then corresponds to the other output power of direct current electricity output.
Therefore, two-output impulse generator power supply unit need each input power is rectified, after transformation respectively, just respectively with
Each output end output power is to electronic device, i.e., two-output impulse generator power supply unit system is corresponding to one defeated by an input terminal respectively
Therefore outlet also causes the bulky of two-output impulse generator power supply unit, send out with the science and technology of micromation now or microminiaturization
Exhibition is mutually violated.In view of this, it is necessary to propose an improvement plan to solve foregoing problems.
Summary of the invention
Therefore, the present invention provides a kind of double-output power supplier, it includes: the first circuit of power factor correction, second
Circuit of power factor correction and output circuit.Output circuit respectively with the first circuit of power factor correction and the second power factor
Correcting circuit connection.First circuit of power factor correction receives the first AC power source, and generates the according to the first AC power source
One DC voltage.First circuit of power factor correction framework is to provide first target voltage, and it is normal to work as the first AC power source
When, the first DC voltage is first target voltage.Second circuit of power factor correction, which receives, is different from the of the first AC power source
Two AC power sources, and the second DC voltage is generated according to the second AC power source.Second circuit of power factor correction framework is to mention
For being less than the second target voltage of first target voltage, and when the second AC power source is normal, the second DC voltage is second
Target voltage.Output circuit provides output voltage according to the first DC voltage or the second DC voltage.Wherein, when the first direct current
When positive pressure is normal, output circuit is based on the first DC voltage and provides output voltage.When the first DC voltage because the first AC power source is different
Often and when less than the second DC voltage, output circuit is based on the second DC voltage and provides output voltage.
The present invention also provides a kind of backup method of double-output power supplier, it includes: utilize the first power factor school
Positive circuit according to the first AC power source export the first DC voltage to output circuit, utilize the second circuit of power factor correction foundation
It is straight according to the first DC voltage or second to output circuit and by output circuit that second AC power source exports the second DC voltage
Flow voltage output output voltage.First circuit of power factor correction framework is to provide first target voltage, and work as the first exchange
When power supply regular supply, the first DC voltage is first target voltage.Second circuit of power factor correction framework is to provide to be less than
Second target voltage of first target voltage, and when the second AC power source regular supply, the second DC voltage is the second mesh
Mark voltage.Wherein, when the first DC voltage regular supply, output circuit is based on the first DC voltage and provides output voltage, and
And when the first DC voltage due to the first AC power source is abnormal less than the second DC voltage when, output circuit is based on the second direct current
Pressure provides output voltage.
Compared to the prior art, double-output power supplier of the invention and its backup method are able in the first AC power source
When normal, output voltage is provided with the output of the first circuit of power factor correction, and when the first AC power source has abnormal, then change
Output voltage is provided with the output of the second circuit of power factor correction, so as to reaching hardware in the case of supporting dual input power supply
The reduction of cost and the promotion of efficiency.
[Detailed description of the invention]
Fig. 1 is the configuration diagram of an embodiment of double-output power supplier of the present invention.
Fig. 2 is the flow chart of an embodiment of the backup method of double-output power supplier of the present invention.
Fig. 3 is the detailed architecture figure of an embodiment of the first circuit of power factor correction in Fig. 1 and Fig. 2.
Fig. 4 is the detailed architecture figure of another embodiment of the first circuit of power factor correction in Fig. 1 and Fig. 2.
Fig. 5 is the configuration diagram of the another embodiment of the first circuit of power factor correction in Fig. 1 and Fig. 2.
Fig. 6 is the detailed architecture figure of an embodiment of the second circuit of power factor correction in Fig. 1 and Fig. 2.
Fig. 7 is the detailed architecture figure of another embodiment of the second circuit of power factor correction in Fig. 1 and Fig. 2.
Fig. 8 is the configuration diagram of the another embodiment of the second circuit of power factor correction in Fig. 1 and Fig. 2.
Fig. 9 is the detailed architecture figure of an embodiment of the output circuit in Fig. 1 and Fig. 2.
Figure 10 is the configuration diagram of another embodiment of double-output power supplier of the present invention.
[specific embodiment]
Fig. 1 is the configuration diagram of an embodiment of double-output power supplier of the present invention.Fig. 2 is dual input electricity of the present invention
The flow chart of one embodiment of the backup method of source power supply unit.Fig. 1 and Fig. 2 are please referred to, double-output power supplier includes first
Circuit of power factor correction 10, the second circuit of power factor correction 20, output circuit 30 and DC-DC converter 40.Output
The input terminal of circuit 30 is connected to the defeated of the first PFC (power factor correction, PFC) circuit 10
The output end of outlet and the second circuit of power factor correction 20.The output end of output circuit 30 is connected to DC-DC converter
40 input terminal, the output end of DC-DC converter 40 are connected to late-class circuit (e.g., load circuit).First power factor
The input terminal of correcting circuit 10 is connected to the first power source supply end, and the input terminal of the second circuit of power factor correction 20 is connected to
Second source feed end.First power source supply end provides the first AC power source AC1, and second source feed end provides the second exchange
Power supply AC2.
First circuit of power factor correction 10 is received from the first external AC power source AC1, and the first power factor school
Positive circuit 10 generates the first DC voltage DC1(step S01 according to the first AC power source AC1).Wherein, the first PFC
10 system structure of circuit is to provide (Boost or Buck) first target voltage.In other words, when the first AC power source AC1 is normally supplied
At once, the first DC voltage DC1 that the first circuit of power factor correction 10 is exported can stablize in first target voltage.
Second circuit of power factor correction 20 is received from the second external AC power source AC2, and the second power factor school
Positive circuit 20 generates the second DC voltage DC2(step S02 according to the second AC power source AC2).Wherein, the first AC power source AC1
It is different from the second AC power source AC2.Second circuit of power factor correction, 20 system structure is to provide (Boost or Buck) second mesh
Mark voltage, and the second target voltage be less than first target voltage (such as: first target voltage 400V, and the second target is electric
Pressure is 390V, however, the present invention is not limited thereto).In other words, when the second AC power source AC2 regular supply, the second power factor school
The second DC voltage DC2 that positive circuit 20 is exported can stablize in the second target voltage.
Output circuit 30 exports an output voltage (step according to the first DC voltage DC1 or the second DC voltage DC2
S03).
DC-DC converter 40 receives output voltage, and generates load voltage (step S04) according to output voltage.
When the first AC power source AC1 regular supply, the first circuit of power factor correction 10 is based on the first AC power source AC1
It exports and stablizes the first DC voltage DC1 in first target voltage to output circuit 30, the first DC voltage DC1 can be greater than at this time
Second DC voltage DC2(step S031).When (i.e. the first DC voltage DC1 stablizes for the first DC voltage DC1 regular supply
One target voltage) when, output circuit 30 is based on the first DC voltage DC1 output output voltage (step S032).
When the first AC power source AC1 exception, the first DC voltage DC1 meeting of the first circuit of power factor correction 10 output
Lower than first target voltage, the first DC voltage DC1 can be less than the second DC voltage DC2(step S031 at this time).When first straight
When galvanic electricity presses DC1 due to the first AC power source AC1 is abnormal less than the second DC voltage DC2, output circuit 30 is based on the second direct current
Voltage DC2 exports output voltage (step S033).In other words, double-output power supplier can in an AC power source AC1 exception,
Output voltage is steadily provided as spare power using the second AC power source AC2.
Fig. 3 is the detailed architecture figure of an embodiment of the circuit of power factor correction in the 1st and 2 figures.In some embodiments
In, referring to Fig. 3, the first circuit of power factor correction 10 include the first rectification circuit 11, first voltage adjust circuit 12 and
First control unit 13.The input terminal that first voltage adjusts circuit 12 is connected to the first rectification circuit 11, first voltage adjusts electricity
The output end on road 12 is connected to output circuit 30, and the control terminal of first voltage adjusting circuit 12 is connected to first control unit
13。
First rectification circuit 11 receives the first AC power source AC1, and the first rectification circuit 11 is according to the first AC power source
AC1 exports the first rectified voltage.In other words, the first rectification circuit 11 rectifies the first AC power source AC1 and (is turned alternating current
It is changed to direct current), to generate the first rectified voltage.
First control unit 13 generates the first power signal of corresponding first target voltage.In other words, first control unit
13 adjust the first DC voltage that the output of circuit 12 is coincident with first target voltage with the first power signal control first voltage
DC1, that is, the size system of first target voltage can correspond to the setting change of the first power signal, and then change the first direct current
Press the size of DC1.
First voltage adjusts circuit 12 and provides first to be consistent with first target voltage under the control of the first power signal
DC voltage DC1.First voltage adjusts circuit 12 and receives the first rectified voltage from the first rectification circuit 11, and in the first function
The first rectified voltage is adjusted to the first DC voltage DC1 under the control of rate signal.That is, first voltage adjusts circuit 12
Voltage adjustment is carried out, under the control of the first power signal to generate the first DC voltage DC1 with first target voltage.
Fig. 4 is the detailed architecture figure of another embodiment of the first circuit of power factor correction 10 in the 1st and 2 figures.Yu Yi
In a little embodiments, referring to Fig. 4, in addition to the first rectification circuit 11, first voltage adjust circuit 12 and first control unit 13,
First circuit of power factor correction 10 also includes the first feedback circuit 14.First feedback circuit 14 is connected to first voltage adjustment electricity
Between the output end and first control unit 13 on road 12.First feedback circuit 14 generates first time according to the first DC voltage DC1
Credit number.First control unit 13 receives the first feedback signal and generates corresponding first target voltage according to the first feedback signal
First power signal.First voltage adjustment circuit 12 responds the size that the first power signal adjusts the first DC voltage DC1, with defeated
Provide the first DC voltage DC1 of stable voltage.
In some embodiments, under the principle that the second target voltage is less than first target voltage, the first power factor school
Positive circuit 10 can have adjustable first target voltage.
Fig. 5 is the configuration diagram of the another embodiment of the first circuit of power factor correction 10 in the 1st and 2 figures.Yu Yi
In a little embodiments, referring to Fig. 5, in addition to the first rectification circuit 11, first voltage adjust circuit 12 and first control unit 13,
First circuit of power factor correction 10 is also comprising multiple first feedback circuits 141,142,143 and selecting unit 15.Selecting unit
15 are connected to the output end that first voltage adjusts circuit 12, and each first feedback circuit 141,142,143 is connected to the first control
Between unit 13 and selecting unit 15.First feedback circuit 141,142,143 respectively corresponds the first object electricity of different voltages value
Pressure.
Selecting unit 15 includes multiple selection switches 151,152,153.Selection switch 151 is connected to first voltage adjusting
Between the output end of circuit 12 and the first feedback circuit 141, switch 152 is selected to be connected to the output that first voltage adjusts circuit 12
Between end and the first feedback circuit 142 and selection switch 153 is connected to the output end and first that first voltage adjusts circuit 12
Between feedback circuit 143.Selection switch 151,152,153 is controlled by selection signal and is connected or is not turned on.
For example, the first target voltage of 141 corresponding voltage value VA of the first feedback circuit, the first feedback circuit 142 are right
Answer the first target voltage of voltage value VB and the first feedback circuit 143 respectively corresponds the first target voltage of voltage value VC.Its
In, voltage value VA, voltage value VB and voltage value VC be different value (such as: voltage value VA, voltage value VB and voltage value VC are respectively
400V, 395V and 390V, however, the present invention is not limited thereto).Under the control of selection signal, it in switch 151,152,153 is selected
One conducting, and the rest is then to be not turned on.
When selecting the first target voltage of signal behavior voltage value VB, switch 152 is selected to be connected in response to selection signal,
And switch 151 and selection switch 153 is selected then to respond selection signal and form open circuit, the first feedback circuit 142 is conducted to whereby
The output end of first voltage adjusting circuit 12.At this point, the first feedback circuit 142 of conducting is generated according to the first DC voltage DC1
First feedback signal, and the first feedback signal of generation is sent to first control unit 13, to cause first control unit 13
The first power signal of corresponding voltage value VB is generated according to the first feedback signal, and this first power signal can allow first voltage
It adjusts circuit 12 and first rectified voltage is adjusted to the first DC voltage DC1(that is, the first DC voltage DC1 of output is stablized
In voltage value VB), and the first DC voltage DC1 is exported to output circuit 30.Whereby, the first circuit of power factor correction 10 can be allowed
The the first DC voltage DC1 stablized in different voltages value is provided, and then is able to view actual demand selection required voltage size and comes
It uses.
In this, only a selection switch 151,152 or 153 is connected selecting unit 15 in the same time, and only the present invention is not
It is limited to this, in other embodiment, selecting unit 15 can be according to the integrated mode that selection switch 151,152,153 is connected
(e.g., switch 151,152 is selected to be connected, switch 153 is selected to be not turned on；Or, selection switch 151,153 is connected, switch 152 is selected
It is not turned on) and the first function that different first feedback signals allow first control unit 13 to generate corresponding different first target voltage is provided
Rate signal.
Fig. 6 is the detailed architecture figure of an embodiment of the second circuit of power factor correction 20 in the 1st and 2 figures.In some
In embodiment, referring to Fig. 6, the second circuit of power factor correction 20 includes the second rectification circuit 21, second voltage adjusting circuit
22 and second control unit 23.The input terminal that second voltage adjusts circuit 22 is connected to the second rectification circuit 21, second voltage
The output end for adjusting circuit 22 is connected to output circuit 30, and the control terminal of second voltage adjusting circuit 22 is connected to the second control
Unit 23 processed.
Second rectification circuit 21 receives the second AC power source AC2, and the second rectification circuit 21 is according to the second AC power source
AC2 exports the second rectified voltage.In other words, the second AC power source AC2 rectifies (by alternating current the second AC power source AC2
Be converted to direct current) to generate the second rectified voltage.
Second control unit 23 generates the second power signal of corresponding second target voltage.In other words, the second control unit
13 adjust the second DC voltage that the output of circuit 22 is coincident with the second target voltage with the second power signal control second voltage
DC2, that is, the size system of the second target voltage can correspond to the setting change of the second power signal, and then change the second direct current
Press the size of DC2.
Second voltage adjusts circuit 22 and provides second to be consistent with the second target voltage under the control of the second power signal
DC voltage DC2.Second voltage adjusts circuit 22 and receives the second rectified voltage from the second rectification circuit 21, and in the second function
The second rectified voltage is adjusted to the second DC voltage DC2 under the control of rate signal.That is, second voltage adjusts circuit 22
Voltage adjustment is carried out, under the control of the second power signal to generate the second DC voltage DC2 with the second target voltage.
Fig. 7 is the detailed architecture figure of another embodiment of the second circuit of power factor correction 20 in the 1st and 2 figures.It please join
Fig. 7 is read, in some embodiments, in addition to the second rectification circuit 21, second voltage adjust circuit 22 and the second control unit 23,
Second circuit of power factor correction 20 also includes the second feedback circuit 24.Second feedback circuit 24 is connected to second voltage adjustment electricity
Second feedback circuit 24 generates the second feedback according to the second DC voltage DC2 between the output end on road 22 and the second control unit 23
Signal.Second control unit 23 receives the second feedback signal and generates corresponding second target voltage according to the second feedback signal
Second power signal.Second voltage adjustment circuit 22 responds the size that the second power signal adjusts the second DC voltage DC2, with defeated
Provide the second DC voltage DC2 of stable voltage.
In some embodiments, under the principle that the second target voltage is less than first target voltage, the second power factor school
Positive circuit 20 can have adjustable second target voltage.
Fig. 8 is the configuration diagram of the another embodiment of the second circuit of power factor correction 20 in the 1st and 2 figures.Yu Yi
In a little embodiments, referring to Fig. 8, in addition to the second rectification circuit 21, second voltage adjust circuit 22 and the second control unit 23,
Second circuit of power factor correction 20 is also comprising multiple second feedback circuits 241,242,243 and selecting unit 25.Selecting unit
25 are connected to the output end that second voltage adjusts circuit 22, and each second feedback circuit 241,242,243 is connected to the second control
Between unit 23 and selecting unit 25.Second feedback circuit 241,242,243 respectively corresponds the second target electricity of different voltages value
Pressure.
Selecting unit 25 includes multiple selection switches 251,252,253.Selection switch 251 is connected to second voltage adjusting
Between the output end of circuit 22 and the second feedback circuit 241, switch 252 is selected to be connected to the output that second voltage adjusts circuit 22
Between end and the second feedback circuit 242 and selection switch 253 is connected to the output end and second that second voltage adjusts circuit 22
Between feedback circuit 243.Selection switch 251,252,253 is controlled by selection signal and is connected or is not turned on.
For example, the first target voltage of 243 corresponding voltage value VD of the second feedback circuit, the second feedback circuit 243 are right
Answer the first target voltage of voltage value VE and the second feedback circuit 243 respectively corresponds the first target voltage of voltage value VF.Its
In, voltage value VD, voltage value VE and voltage value VF be different value (such as: voltage value VD, voltage value VE and voltage value VF are respectively
395V, 390V and 385V, however, the present invention is not limited thereto).Under the control of selection signal, it in switch 251,252,253 is selected
One conducting, and the rest is then to be not turned on.
When selecting the second target voltage of signal behavior voltage value VE, select switch 252 that can lead in response to selection signal
It is logical, and switch 251 and selection switch 253 is selected then to respond selection signal and form open circuit, the second feedback circuit 242 is connected whereby
The output end of circuit 22 is adjusted to second voltage.At this point, the second feedback circuit 242 of conducting is produced according to the first DC voltage DC1
Raw second feedback signal, and the second feedback signal of generation is sent to the second control unit 23, to cause the second control unit
23 according to the second feedback signal generate corresponding voltage value VE the second power signal, and this second power signal can allow second electricity
Second rectified voltage is adjusted to the second DC voltage DC2(that is, the second DC voltage DC2 by output is steady by voltage regulator circuit 22
It is scheduled on voltage value VE), and the second DC voltage DC2 is exported to output circuit 30.Whereby, the second circuit of power factor correction can be allowed
20 provide the second DC voltage DC2 stablized in different voltages value, and then are able to view actual demand selection required voltage size
To use.
In this, only a selection switch 251,252 or 253 is connected selecting unit 25 in the same time, and only the present invention is not
It is limited to this, in other embodiment, selecting unit 25 can be according to the integrated mode that selection switch 251,252,253 is connected
(e.g., switch 251,252 is selected to be connected, switch 253 is selected to be not turned on；Or, selection switch 251,253 is connected, switch 252 is selected
It is not turned on) and different second feedback signals are provided, the second control unit 23 is allowed to generate the second of corresponding different second target voltages
Power signal.
Fig. 9 is the detailed architecture figure of an embodiment of the output circuit 30 in the 1st and 2 figures.In some embodiments, it please join
Fig. 9 is read, output circuit 30 includes first diode 31, the second diode 32 and storage capacitor 33.First diode 31 is connected to
Between first circuit of power factor correction 10 and storage capacitor 33, and the second diode 32 is connected to the second PFC
Between circuit 20 and storage capacitor 33.One end of storage capacitor 33 is connect with the output end of output circuit 30, and storage capacitor
33 other end is connect with ground terminal.
First diode 31 receives the first DC voltage DC1, and the physics for being connected or being not turned on according to first diode 31
Characteristic, the i.e. voltage difference of the input terminal and output end of first diode 31 be more than or equal to threshold voltage when just conducting, it is on the contrary then
It is not turned on.Therefore when the voltage of the first DC voltage DC1 and the output end (i.e. the second DC voltage DC2) of first diode 31
When difference is more than or equal to threshold voltage, then first diode 31 is just connected to export the first DC voltage DC1.That is, judging
Whether one DC voltage DC1 is less than the second DC voltage DC2(step S031 shown in Fig. 2), when the judgment is no, then the one two
Pole pipe 31, which is just connected, allows the first DC voltage DC1 to export (step S032) as output voltage.On the contrary, when the first DC voltage
When DC1 has abnormal, the voltage difference of the output end of the first DC voltage DC1 and first diode 31 is caused to be less than threshold voltage
When, cause first diode 31 to be not turned on.
Second diode 32 is similar to first diode 31, also has threshold voltage, be greater than in the second DC voltage DC2 etc.
(the step S033, i.e., when the first DC voltage DC1 is less than when the first DC voltage DC1 of the output end of the second diode 32
When two DC voltage DC2), the second diode 32 is just connected, and the second DC voltage DC2 is allowed to export as output voltage.Wherein, when
First diode 31 be connected when, output voltage can be greater than the second DC voltage DC2 so that the input terminal of the second diode 32 with
The difference of output end can be less than threshold voltage, and the second diode 32 is caused to be not turned on.
Storage capacitor 33 receives the first DC voltage DC1 or the second DC voltage DC2, and provides output voltage accordingly to rear
Grade circuit.
In some embodiments, storage capacitor 33 can be Single Capacitance and be constituted, but system is not limited thereto in the present invention,
In other embodiments, storage capacitor 33 also can be series-parallel with multiple capacitors or combines and constituted with multiple passive devices.
In some embodiments, the first circuit of power factor correction 10 can be identical with the second circuit of power factor correction 20
Circuit opens up TRI, such as: but not limited to this, the two all has single feedback circuit or the two all has multiple feedback circuits.?
In some embodiments, the first circuit of power factor correction 10 can open up TRI from the second circuit of power factor correction 20 for different circuits,
Such as: but not limited to this, the first circuit of power factor correction 10 has multiple feedback circuits, and the second circuit of power factor correction
20 have single feedback circuit.
In some embodiments, first control unit 13 can be a pfc controller.Second control unit 23 can be a PFC
Controller.
In some embodiments, the first power signal can be PWM(pulse width modulation) signal.Second power signal also may be used
For pwm signal.
In some embodiments, the first AC power source AC1 can be the first alternating current, and the second AC power source AC2 can be second
Alternating current.In some embodiments, the first alternating current and the second alternating current may respectively be 110V AC and 220V AC, but the present invention is not limited to
This.
In some embodiments, late-class circuit can be a load circuit.In some embodiments, late-class circuit may include straight
Stream is to direct current transducer and load circuit.
Figure 10 is the configuration diagram of another embodiment of double-output power supplier of the present invention.Referring to Fig. 10, load
The input terminal of circuit 50 is connected to the output end of DC-DC converter 40, to receive direct current to the negative of value stream transformer 40
Voltage is carried, for the operation of load circuit 50.
Wherein, although the present invention in an embodiment in be to execute step S02, this hair again after first carrying out step S01
It is bright that system is not limited thereto, in some embodiments, can also first carry out executed after step S02 again step S01 or step S01 with
Step S02 is synchronous to be executed.
To sum up, double-output power supplier and its backup method according to the present invention are able in the first PFC electricity
When the output on road 10 is normal, output voltage is provided with the output of the first circuit of power factor correction 10, and in the first power factor
When the output abnormality of correcting circuit 10, then changes and provide output voltage with the output of the second circuit of power factor correction 20.Whereby can
There is provided continual and steady output voltage in the case of supporting dual input power supply, and can reach reduce power supply unit volume,
The reduction of hardware cost and the promotion of efficiency.
A specific embodiment of the invention and embodiment are elaborated above in conjunction with attached drawing, but the present invention is not
It is limited to the above-described embodiment and examples, within the knowledge of those skilled in the art, this can also be not being departed from
It is made a variety of changes under the premise of inventive concept.
Claims (10)
1. a kind of double-output power supplier, characterized by comprising:
One first circuit of power factor correction receives one first AC power source, and it is straight to generate one first according to first AC power source
Galvanic electricity pressure, wherein the first circuit of power factor correction framework is to provide a first target voltage, and work as first alternating current
When the regular supply of source, which is the first target voltage；
One second circuit of power factor correction receives one second AC power source, and it is straight to generate one second according to second AC power source
Galvanic electricity pressure, wherein first AC power source is different from second AC power source, which is to mention
For being less than one second target voltage of the first target voltage, and when the second AC power source regular supply, this is second straight
Galvanic electricity pressure is second target voltage；
One output circuit connects first circuit of power factor correction and second circuit of power factor correction, according to this first
DC voltage or one output voltage of the second direct voltage output, wherein when the first DC voltage regular supply, the output
Circuit is based on first direct voltage output output voltage, and when first DC voltage is because of first AC power source exception
And when being less than second DC voltage, which is based on second direct voltage output output voltage；And
One DC-DC converter connects the output circuit, receives the output voltage and is generated according to the output voltage one negative
Carry voltage；
Wherein, which includes
One first control unit；
One selecting unit connects the output end of a first voltage adjustment circuit；And
Several first feedback circuits, are connected between the selecting unit and the first control unit, respectively according to first direct current
Voltage output corresponds to one first feedback signal of the first target voltage of different value to the first control unit, the wherein selection
Unit selects one of several first feedback circuits to be connected according to a selection signal, for several first feedback circuits generations pair
The first feedback signal answered.
2. double-output power supplier according to claim 1, which is characterized in that the first circuit of power factor correction packet
Contain:
One first rectification circuit receives one first AC power source, exports one first rectified voltage according to first AC power source；
One first voltage adjustment circuit connects between first rectification circuit and the output circuit, according to one first power signal
First rectified voltage is adjusted to first DC voltage；
One first control unit connects the first voltage adjustment circuit, generates corresponding first mesh according to one first feedback signal
Mark first power signal of voltage；
Wherein, which selects one of several first feedback circuits to be conducted to the first voltage according to a selection signal
The output end of adjustment circuit.
3. double-output power supplier according to claim 1, which is characterized in that the second circuit of power factor correction packet
Contain:
One second rectification circuit receives one second AC power source, exports one second rectified voltage according to second AC power source；
One second voltage adjustment circuit connects between second rectification circuit and the output circuit, according to one second power signal
Second rectified voltage is adjusted to second DC voltage；And
One second control unit connects the second voltage adjustment circuit, generates second power of corresponding second target voltage
Signal.
4. double-output power supplier according to claim 3, which is characterized in that the second circuit of power factor correction packet
Contain:
One second feedback circuit is connected between the output end of the second voltage adjustment circuit and second control unit, according to
Second direct voltage output, one second feedback signal gives second control unit, wherein second control unit according to this second
Feedback signal generates second power signal of corresponding second target voltage.
5. double-output power supplier according to claim 1, which is characterized in that the second circuit of power factor correction packet
Contain:
One second rectification circuit receives one second AC power source, exports one second rectified voltage according to second AC power source；
One second voltage adjustment circuit connects between second rectification circuit and the output circuit, according to one second power signal
Second rectified voltage is adjusted to second DC voltage；
One second control unit connects the second voltage adjustment circuit, generates corresponding second mesh according to one second feedback signal
Mark second power signal of voltage；
One selecting unit connects the output end of the second voltage adjustment circuit；And
Several second feedback circuits are connected between the selecting unit and second control unit, respectively according to second direct current
Second feedback signal that voltage output corresponds to second target voltage of different value gives second control unit, the wherein selection
Unit according to a selection signal select one of several second feedback circuits be conducted to the second voltage adjustment circuit this is defeated
Outlet.
6. double-output power supplier according to claim 1, which is characterized in that the output circuit includes:
One storage capacitor, one end are connect with the output end of the output circuit, and the other end is coupled to a ground terminal；
One first diode is connected between first circuit of power factor correction and the storage capacitor；And one the 2nd 2 pole
Pipe, is connected between second circuit of power factor correction and the storage capacitor.
7. a kind of backup method of double-output power supplier, characterized by comprising:
One first DC voltage is exported to an output electricity according to one first AC power source using one first circuit of power factor correction
Road, wherein the first circuit of power factor correction framework is to provide a first target voltage, and work as first AC power source just
Often for seasonable, which is the first target voltage；
One second DC voltage is exported to an output electricity according to one second AC power source using one second circuit of power factor correction
Road, wherein the second circuit of power factor correction framework is one second target voltage provided less than the first target voltage, and
And when the second AC power source regular supply, which is second target voltage；
By the output circuit according to first DC voltage or one output voltage of the second direct voltage output, wherein when this first
When DC voltage regular supply, which is based on first direct voltage output output voltage, and when this is first straight
When galvanic electricity pressure is less than second DC voltage because of first AC power source exception, which is based on second DC voltage
Export the output voltage；One load voltage is generated according to the output voltage by a DC-DC converter；And
Wherein, one first feedback signal is generated according to first DC voltage respectively by several first feedback circuits；
One of several first feedback circuits are selected to be connected according to a selection signal by a selecting unit；And
First power signal of the corresponding first target voltage is generated by one of several first feedback circuits conducting person.
8. the backup method of double-output power supplier according to claim 7, which is characterized in that this utilizes one first function
Rate factor correcting circuit exports one first DC voltage to the step of output circuit according to one first AC power source:
First AC power source is rectified to export one first rectified voltage；
First rectified voltage is adjusted to first DC voltage according to one first power signal；
One first feedback signal is generated according to first DC voltage；And
First power signal of the corresponding first target voltage is generated according to first feedback signal.
9. the backup method of double-output power supplier according to claim 7, which is characterized in that this utilizes one second function
Rate factor correcting circuit according to one second AC power source export one second DC voltage to the step of output circuit include comprising:
Second AC power source is rectified to export one second rectified voltage；
Second rectified voltage is adjusted to second DC voltage according to one second power signal；
One second feedback signal is generated according to second DC voltage；And
Second power signal of corresponding second target voltage is generated according to second feedback signal.
10. the backup method of double-output power supplier according to claim 7, which is characterized in that this utilizes one second
Circuit of power factor correction exports one second DC voltage to the step of output circuit according to one second AC power source:
Second AC power source is rectified to export one second rectified voltage；
Second rectified voltage is adjusted to second DC voltage according to one second power signal；
One second feedback signal is generated according to second DC voltage respectively by several second feedback circuits；
One of several second feedback circuits are selected to be connected according to a selection signal by a selecting unit；And
Second power signal of corresponding second target voltage is generated by one of several second feedback circuits conducting person.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510607160.7A CN106549483B (en) | 2015-09-22 | 2015-09-22 | Double-output power supplier and its backup method |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101465598A (en) * | 2009-01-08 | 2009-06-24 | 普天信息技术研究院有限公司 | AC/DC converter |
| CN103683470A (en) * | 2012-09-17 | 2014-03-26 | 全汉企业股份有限公司 | Power supply device with power supply backup mechanism |
| CN203589831U (en) * | 2013-10-31 | 2014-05-07 | 武汉迈威光电技术有限公司 | Redundant hot backup industrial Ethernet switch power supply |
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| TWI474593B (en) * | 2012-09-06 | 2015-02-21 | Fsp Technology Inc | Power supply apparatus with power factor correction and pulse width modulation mechanism and method thereof |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101465598A (en) * | 2009-01-08 | 2009-06-24 | 普天信息技术研究院有限公司 | AC/DC converter |
| CN103683470A (en) * | 2012-09-17 | 2014-03-26 | 全汉企业股份有限公司 | Power supply device with power supply backup mechanism |
| CN203589831U (en) * | 2013-10-31 | 2014-05-07 | 武汉迈威光电技术有限公司 | Redundant hot backup industrial Ethernet switch power supply |
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