CN206099374U - Many mains operated circuit - Google Patents
Many mains operated circuit Download PDFInfo
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- CN206099374U CN206099374U CN201620665765.1U CN201620665765U CN206099374U CN 206099374 U CN206099374 U CN 206099374U CN 201620665765 U CN201620665765 U CN 201620665765U CN 206099374 U CN206099374 U CN 206099374U
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- 238000012937 correction Methods 0.000 abstract description 5
- 244000062793 Sorghum vulgare Species 0.000 abstract 3
- 235000019713 millet Nutrition 0.000 abstract 3
- 238000010586 diagram Methods 0.000 description 26
- 238000004088 simulation Methods 0.000 description 26
- 230000036962 time dependent Effects 0.000 description 16
- 239000003990 capacitor Substances 0.000 description 12
- 230000005611 electricity Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000012946 outsourcing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000012358 sourcing Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
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Abstract
The utility model discloses a many mains operated circuit. The utility model discloses an including half -wave rectifier circuit among the many mains operated circuit, does passive power factor correction fill out millet circuit and DC DC converting circuit, wherein, DC DC converting circuit's input is connected to first via power, half -wave rectifier circuit's input is connected to second way power, half -wave rectifier circuit's output is connected to the input that passive power factor correction filled out the millet circuit, DC DC converting circuit's input is connected to the output that passive power factor correction filled out the millet circuit. The utility model provides a structure is comparatively simple, the higher many mains operated circuit of circuit efficiency.
Description
Technical field
This utility model is related to power supply technique field, more particularly to a kind of multiple feed circuit.
Background technology
Important content of the power supply reliability as management of electric power dependability, directly represent electric power system to electric terminal
Continued power ability.For the reliability for ensureing to power, multiple feed is also one of development trend of current power supply technique.
It is different that many power supplys generally refer to source, independent multiple power supplys to each other.Many power supplys are may refer to from difference
The power supply of electrical network, or circuit contacts very weak from each other when can be from electrical network but running, or from same electrical network
But electrical distance therebetween is farther out etc..For example, from the alternating current or unidirectional current of power supply adaptor and from POE (Power
Over Ethernet, POE) unidirectional current just may be considered separate power supply, it is and relatively conventional at present
Be two kinds of power supplys in dual power supply system, can be generally used in the electric power loop of region, to ensure that any one power supply goes out
During existing misoperation or the when of breaking down, another power supply can continue to power supply.Multiple feed is although ensure that power supply can
By property, but it is often with sacrifice circuit efficiency as cost, due to the coupling and the control that are related between multiple power sources, more electricity
Source power supply circuits are typically complex, and circuit loss is also corresponding larger.
Therefore, how to realize a kind of relatively simple, the higher multiple feed circuit of circuit efficiency, be industry institute urgently
Research and the problem for solving.
Utility model content
This utility model provide a kind of multiple feed circuit, it is a kind of relatively simple to realize, circuit efficiency compared with
High multiple feed circuit.
Embodiment of the present utility model provides a kind of multiple feed circuit, including：Half-wave rectifying circuit, Passive Power
Factor correcting valley fill circuit and direct current DC-DC change-over circuits：
The input of the DC-DC change-over circuits is connected to first via power supply；
The input of the half-wave rectifying circuit is connected to the second road power supply；The outfan connection of the half-wave rectifying circuit
To the input of the PPFC valley fill circuit；The input of the DC-DC change-over circuits is connected to the nothing
The outfan of active power factor correction valley fill circuit.
Further, the half-wave rectifying circuit includes unilateal conduction device；
The positive pole of the unilateal conduction device is connected to second road power supply, the negative pole connection of the unilateal conduction device
To the input of the PPFC valley fill circuit.
Further, the PPFC valley fill circuit includes the first unilateal conduction device, second unidirectional
Conductive devices, the 3rd unilateal conduction device, the first electric capacity and the second electric capacity；
The negative pole of the first unilateal conduction device is connected to the outfan of the half-wave rectifying circuit, and with described second
The positive pole connection of electric capacity；Negative pole, the Yi Jisuo of the positive pole of the first unilateal conduction device and the second unilateal conduction device
State the positive pole connection of the first electric capacity；The negative pole of the positive pole of the second unilateal conduction device and the 3rd unilateal conduction device,
And the negative pole connection of second electric capacity；The negative pole of first electric capacity is connected with the positive pole of the 3rd unilateal conduction device
It is connected to ground；The positive pole of second electric capacity is connected to the input of the DC-DC change-over circuits.
Alternatively, the capacity of first electric capacity is identical with the capacity of second electric capacity.
Alternatively, also include inductance in the PPFC valley fill circuit；The first unilateal conduction device
Negative pole be connected with the positive pole of second electric capacity by the inductance.
Alternatively, the first via supply voltage is higher than second road supply voltage.
Alternatively, the first via power supply is POE POE 48V power supplys；Second road power supply is carried for adapter
For exchange AC 24V power supplys or direct current DC 12V power supplys.
Alternatively, the input voltage range of the DC-DC change-over circuits is 5V to 63V.
Alternatively, the unilateal conduction device is diode.
In the multiple feed circuit that embodiment of the present utility model is provided, half-wave rectifying circuit, passive work(are included
Rate factor correcting valley fill circuit and DC-DC change-over circuits, wherein, the input of DC-DC change-over circuits is connected to first via electricity
Source, the input of half-wave rectifying circuit are connected to the second road power supply, and the outfan of half-wave rectifying circuit is connected to Passive Power
The input of factor correcting valley fill circuit, the input of DC-DC change-over circuits are additionally coupled to PPFC Fill valley electricity
The outfan on road.Can see that the multiple feed circuit structure provided by this utility model embodiment is relatively simple, and pass through
The effect for improving circuit efficiency can be obtained using PPFC valley fill circuit such that it is able to realize one kind more
Simply, the higher multiple feed circuit of circuit efficiency.
Description of the drawings
For the technical scheme being illustrated more clearly that in this utility model embodiment, below will be to needed for embodiment description
Accompanying drawing to be used is briefly introduced, it should be apparent that, drawings in the following description are only some enforcements of the present utility model
Example, for one of ordinary skill in the art, without having to pay creative labor, can be with attached according to these
Figure obtains other accompanying drawings.
Fig. 1 is a kind of schematic diagram of multiple feed circuit in prior art；
The circuit simulation schematic diagram of the multiple feed that Fig. 2 is provided for embodiment of the present utility model；
Fig. 3 is the circuit simulation schematic diagram that the second road power supply is powered to the load by all wave rectification；
Fig. 4 is the circuit simulation schematic diagram that the second road power supply is powered to the load by halfwave rectifier；
The technical side of the multiple feed circuit that Fig. 5 is provided according to some embodiments of the present utility model for the second road power supply
The circuit simulation schematic diagram that case powers to the load；
Fig. 6 (a) is based on the time dependent simulation result schematic diagram of voltage at circuit load shown in Fig. 3；
Fig. 6 (b) is based on the time dependent simulation result schematic diagram of voltage at circuit load shown in Fig. 4；
Fig. 6 (c) is based on the time dependent simulation result schematic diagram of voltage at circuit load shown in Fig. 5；
Fig. 7 (a) is based on the time dependent simulation result schematic diagram of electric current on circuit diode D6 shown in Fig. 3；
Fig. 7 (b) is based on the time dependent simulation result schematic diagram of electric current on circuit diode D5 shown in Fig. 4；
Fig. 7 (c) is based on the time dependent simulation result schematic diagram of electric current on circuit diode D1 shown in Fig. 5；
The circuit of the multiple feed circuit that Fig. 8 is provided according to other embodiment of the present utility model for the second road power supply
Emulation schematic diagram；
Fig. 9 (a) is based on the time dependent simulation result schematic diagram of voltage at circuit load shown in Fig. 8；
Fig. 9 (b) is based on the time dependent simulation result schematic diagram of electric current on circuit diode D1 shown in Fig. 8.
Specific embodiment
In order that the purpose of this utility model, technical scheme and advantage are clearer, below in conjunction with accompanying drawing to this practicality
It is new to be described in further detail, it is clear that described embodiment is only this utility model some embodiments, rather than
Whole embodiments.Based on the embodiment in this utility model, those of ordinary skill in the art are not making creative work
Under the premise of all other embodiment for being obtained, belong to the scope of this utility model protection.
Multiple feed technology is that, for a highly important technology in electrical domain, Fig. 1 shows of the prior art one
Plant the technical scheme of multiple feed circuit.As shown in figure 1, the multiple feed circuit is by first via power supply 101 and the second tunnel
Power supply 102 is powered, and includes rectification circuit 103, the first capacitor cell 104, the second capacitor cell 105, combiner unit 106
And DC-DC change-over circuits 107.First via power supply 101 and the second road power supply 102 are by multiple feed electricity as shown in Figure 1
The combining of road elder generation, then unify to be transformed into low level output by DC-DC change-over circuits 107, i.e., it is powered to successive load.
Specifically, as shown in figure 1, first via power supply 101 is by the first capacitor cell 104, by the first capacitor cell 104
Electric capacity, carry out energy storage when first via power supply 101 is powered.Second road power supply 102 is then carried out whole first by rectification circuit 103
Stream, wherein, rectification circuit 10 is the full-wave rectifying circuit that four diodes are constituted, then by the second capacitor cell 105, by second
Electric capacity in capacitor cell 105, can such as be BUS electric capacity, carry out energy storage when the second road power supply 102 is powered.
Wherein, the second road power supply 102 can be from the alternating current or unidirectional current of power supply adaptor, first via power supply 101
The unidirectional current that POE powers is can be from, the second capacitor cell 105 can also then prevent moment from POE inputs (switch)
Take out high current and cause current-limiting protection.
First via power supply 101 is by passing sequentially through rectification circuit 103 with the second road power supply 102 after the first capacitor cell 104
And second after capacitor cell 105, it is further advanced by combiner unit 106 and is combined, wherein combiner unit 106 can be by two
Pole pipe is constituted, and can then be further advanced by DC-DC change-over circuits 107 and be converted to relatively low level after two-way power supply combining, with
It is supplied to rear class to receive the terminal of power supply, the diode in combiner unit 106 can be in first via power supply 101 and the second road power supply
In the case that 102 power, it is to avoid when the voltage of first via power supply 101 is higher than the voltage of the second road power supply 102, energy in circuit in fact
To the recharge of the second road power supply 102, i.e., can prevent reciprocal energy transmission.
But can see that multiple feed circuit as shown in Figure 1 is not a preferable multiple feed scheme,
Rectification circuit 103 can cause larger current distortion and current spikes, and very big loss not only can be caused to circuit, reduce
The efficiency that power supply is powered, and in device, the quick change of voltage or electric current can also aggravate EMI (Electromagnetic
Interference, electromagnetic interference) radiate and conduct, in the case of DC input of the second road power supply 102 for power supply adaptor,
On diode in multiple feed circuit as shown in Figure 1, circuit loss is also larger, in addition, it is also seen that as shown in Figure 1
Multiple feed circuit devcie it is more, structure is complex, and diode current and electrochemical capacitor voltage stress are also larger.
In order to overcome the defect that multiple feed technical scheme is present in prior art, simplify the coupling between many power supplys,
And circuit loss is reduced, this utility model embodiment proposes a kind of technical scheme of multiple feed circuit, to realize one
Plant relatively simple, the higher multiple feed circuit of circuit efficiency.Below in conjunction with accompanying drawing, to embodiment of the present utility model
A kind of multiple feed circuit for providing is described in detail.
Fig. 2 shows the schematic diagram of the multiple feed circuit that this utility model embodiment is provided.
As shown in Fig. 2 the multiple feed circuit that this utility model embodiment is provided can receive from first via power supply
201 and second road power supply 202 power supply.
Specifically, as shown in Fig. 2 including halfwave rectifier in the multiple feed circuit of this utility model embodiment offer
Circuit 203, PPFC valley fill circuit 204, and DC-DC change-over circuits 205.The English contracting of PFC
PFC (Power Factor Correction) is written as, is described for convenience, hereinafter will be represented using passive PFC valley fill circuits
PPFC valley fill circuit.
Wherein, the input of DC-DC change-over circuits 205 can be connected to first via power supply 201, to obtain from the first via
The power supply of power supply 201；The input of half-wave rectifying circuit 203 can be connected to the second road power supply 202, to obtain the second road power supply
202 power supply, further, the outfan of half-wave rectifying circuit 203 is connected to the input of passive PFC valley fill circuits 204,
The input of DC-DC change-over circuits 205 is then additionally coupled to the outfan of passive PFC valley fill circuits 204.
Can see, in the multiple feed circuit that this utility model embodiment is provided, what first via power supply 201 was provided
Power supply can directly reach DC-DC change-over circuits 205, and the power supply that the second road power supply 202 is provided is then through half-wave rectifying circuit 203
After rectification, then via DC-DC change-over circuits 205 are reached after the process of passive PFC valley fill circuits 204, both are in DC-DC change-over circuits
Relatively low level is converted in 105 and is supplied to successive load.
Preferably, in some embodiments of the present utility model, the supply voltage of first via power supply 201 can be higher than second
The supply voltage of road power supply 202.
Specifically such as, first via power supply 201 can be from the POE 48V power supplys of POE；Second road power supply 202
The alternating current or unidirectional current of adapter offer, the AC 24V or DC 12V power supplys that such as adapter is provided are provided.
Wherein, POE power supply techniques are typically based on existing Ethernet wiring architecture, are that some are based on IP
(such as IP telephone machine, wireless local network connecting point, web camera etc. are whole for the terminal of (Internet Protocol, procotol)
End) transmission data signal while, there is provided direct current supply.POE powers the power supply (Power that can also be referred to as based on LAN
Over LAN) or active Ethernet (Active Ethernet).
POE power supplies can be specifically PSE devices (Power Sourcing Equipment, end device of powering).PSE
Equipment started to supply from low-voltage to receiving end equipment within the starting period of a configurable time (generally less than 15 μ s)
Electricity, until providing the DC source of reliable and stable 48V.
Wherein, adapter generally can be converted as the supply voltage of more small-sized portable electric appts and electronic apparatus
Equipment, can typically include shell, transformator, inductance, electric capacity, control IC (integrated circuit, integrated circuit),
The components and parts such as PCB (Printed Circuit Board, printed circuit board).
Multiple feed circuit as shown in Figure 2, half-wave rectifying circuit 203 specifically can be by unilateal conduction device structures
Into mainly to realize carrying out halfwave rectifier to the second road power supply 202.
Wherein, unilateal conduction device can generally be diode or one-way SCR etc..In this utility model embodiment
Description in, by by taking the typical device diode in one way conducting device as an example, it should be appreciated that this utility model implement
Diode in the description of example can have similar forward conduction, the device of reverse cut-off characteristicses and module adaptive ground by other
Substitute.
Half-wave rectifying circuit 203 such as illustrated in fig. 2, includes a unilateal conduction device (diode D1), and which is just
Pole is connected to the second road power supply 202, and its negative pole is connected to the input of passive PFC valley fill circuits 204 such that it is able to using two poles
The one-way conduction characteristic of pipe, in the case where the second road power supply 202 provides alternating current, only intercepts the electric current of half period, and then
Alternating current is converted to into unidirectional current, that is, halfwave rectifier, the unidirectional current exported after halfwave rectifier is Rectified alternating current.
Further, half-wave rectifying circuit 203 can also be in the supply voltage of first via power supply 201 than the second road power supply
202 supply voltage is high and two-way power supply is accessed in the case of being powered simultaneously, the spy reversely ended using diode D1
Property, prevent 201 anti-sink current of first via power supply from going to the second road power supply 202, and the confession of the second road power supply 202 can be nipped off
Electricity, is powered by first via power supply 201.
As shown in Fig. 2 employing passive PFC valley fill circuits in the multiple feed circuit of this utility model embodiment offer
204, to reach the effect for improving efficiency.
In multiple feed circuit as shown in Figure 2, in passive PFC valley fill circuits 204, can be specifically included
One unilateal conduction device, the second unilateal conduction device, the 3rd unilateal conduction device, the first electric capacity and the second electric capacity.
Wherein, the first unilateal conduction device, the second unilateal conduction device and the 3rd unilateal conduction device preferably can be with
It is diode, diode D2 (the first unilateal conduction device), diode D3 (the second conductive devices) as shown in Figure 2 and diode
D4 (the 3rd unilateal conduction device), or can also be controllable silicon etc..
Specifically, so that unilateal conduction device as shown in Figure 2 is diode as an example, embodiment of the present utility model is provided
Multiple feed circuit in passive PFC valley fill circuits 204 structure and connection can be described as follows：
The negative pole of diode D2 is connected to the outfan of half-wave rectifying circuit 203, and connects with the positive pole of the second electric capacity C2
Connect；The positive pole of diode D2 is connected with the positive pole of the negative pole and the first electric capacity C1 of diode D3；The positive pole of diode D3 and two
The negative pole connection of the negative pole of pole pipe D4 and the second electric capacity C2；The negative pole of the first electric capacity C1 is all connected with the positive pole of diode D4
To ground；The positive pole of the second electric capacity C2 is connected to the input of DC-DC change-over circuits 205.
Specifically, the first electric capacity C1 and the second electric capacity C2 can be capacity identical electric capacity.First electric capacity C1 is electric with second
The rated voltage for holding C2 can be determined according to the alternating current voltage provided by second source.
Preferably, the first electric capacity C1 and the second electric capacity C2 can be the electric capacity of parameter all same, such as be capacity for 220
μ F, the electrochemical capacitor that rated voltage is 35V.
Further, as shown in Fig. 2 half-wave rectifying circuit 203 is made up of diode D1, its outfan is diode D1's
Negative pole, then the diode D2 of passive PFC valley fill circuits 204 be specifically connected to the negative pole of diode D1 in half-wave rectifying circuit 203.
Wherein, the ultimate principle of passive PFC (also referred to as passive PFC) valley fill circuit be make exchange input fundamental current with
Between voltage, phase contrast reduces to improve power factor, so as to reach the effect for improving efficiency.
Specifically, power factor (Power Factor) is for representing between active power and total power consumption (apparent energy)
Relation, that is, effective power is divided by the ratio of apparent energy.Wherein, active power is electric current and voltage wink in a cycle
The meansigma methodss of duration product, and apparent energy is RMS (Root Mean Square, the root-mean-square value of electric current：) value and voltage
The product of RMS value.Power factor can be used for the power consumption efficiency for weighing electrical equipment, i.e. utilization rate of electrical, and power factor is bigger,
Represent that utilization rate of electrical is higher.
With the as shown in Figure 2 passive PFC Fill valleys being made up of three diodes (D2, D3, D4) and two electric capacity (C1, C2)
As a example by circuit 204, the multiple feed circuit provided in some embodiments of the present utility model by passive PFC valley fill circuits 204
In operation principle be：
Providing in the second road power supply 202 and (alternating current for 24V for providing is assumed) under alternating current conditions, alternating current is by partly
Power to late-class circuit after diode D1 halfwave rectifier in ripple rectification circuit 203 and charge (when alternating current is by just to electric capacity
String rule change 1/2 cycle in diode D1 conducting, in another 1/2 cycle diode D1 cut-off), electric current to the second electric capacity C2 simultaneously
Jing diodes D3 charges to the first electric capacity C1 (the first electric capacity C1 is connected by diode D3 with the second electric capacity C2), due to C1 and C2
It is identical, therefore alternating current is to peaking VAC_PEAK(wherein, VAC_PEAK=(24 × 1.414) V=34V) when, now the first electric capacity C1
It is identical with the voltage on the second electric capacity C2, it is 1/2 VAC_PEAK, i.e. the both end voltage of electric capacity C1 or C2 is 17V or so, therefore
Pressure 35V or or even the electric capacity of 25V can meet, and with the sinusoidal variations of alternating current, when alternating current voltage falls to
1/2VAC_PEAKWhen, diode D2 and diode D4 is turned on, so as to the first electric capacity C1 is in parallel to successive load with the second electric capacity C2
(by DC-DC modular converters 205).Wherein, many power supplys for being provided in some embodiments of the present utility model as shown in Figure 2
In power supply circuits, diode D2 and diode D4 can be specifically the diode of hundreds of mA.
Can see, in the multiple feed circuit that some embodiments of the present utility model as shown in Figure 2 are provided, utilize
Connected with passive PFC valley fill circuits after half-wave rectifying circuit, by increasing capacitance it is possible to increase the angle of flow, fill and lead up valley point, are higher than 1/ in input voltage
2VAC_PEAKWhen store energy, input voltage be less than 1/2VAC_PEAKWhen undertake power supply task, reduce because halfwave rectifier bring it is strong
Strong current spike, makes input current be changed into the waveform close to sine wave from spike, improves power factor (PF), significantly reduce
Total harmonic distortion, and then circuit efficiency is improved, and diode and electric capacity stress and external adapter stress can be reduced.
Further, half-wave rectifying circuit is employed in the multiple feed circuit for providing due to this utility model embodiment
And passive PFC valley fill circuits, the angle of flow is increased, such that it is able to coordinate the DC-DC change-over circuits of wide pressure input, i.e. DC-DC
Change-over circuit 205 is preferably the wider DC-DC change-over circuits of input voltage range, such as new in this practicality as shown in Figure 2
In the multiple feed circuit that type embodiment is provided, the input voltage range of DC-DC change-over circuits can be 5V to 63V it
Between.
Specifically, in the multiple feed circuit that this utility model embodiment is provided, DC-DC change-over circuits 205 can be with
Be with flyback sourse as typical DC level switching circuit, wherein, flyback sourse is one kind of insulating power supply, its former limit note
When entering energy, secondary is without output；In former limit not input energy, secondary exports energy on the contrary.It should be appreciated that this practicality is new
In the multiple feed circuit that type embodiment is provided, DC-DC change-over circuits can also be other kinds of DC level switching circuit
Or insulating power supply etc., here will not be enumerated.
In order to the multiple feed circuit that clearer explanation embodiment of the present utility model is provided can achieve the effect that,
Below by by the result of circuit simulation illustrating：
Wherein, Fig. 3 shows the circuit simulation schematic diagram that the second road power supply is powered to the load by all wave rectification；Fig. 4 shows
The circuit simulation schematic diagram that the second road power supply is powered to the load by halfwave rectifier is gone out；Fig. 5 show the second road power supply according to
The circuit simulation that the technical scheme of the multiple feed circuit that some embodiments of the present utility model are provided powers to the load is illustrated
Figure.
Specifically, the second road power supply in Fig. 3,4,5 adopts zero offset, amplitude for 36V, frequency for 50HZ emulation just
String source (SINE (0 36 50) as depicted)；The D1-D4 in D5, Fig. 5 in D6-D9, Fig. 4 in Fig. 3 adopt numbering for
The dummy diode of B520C；The C3 in C4 and Fig. 4 in Fig. 3 adopts capacity for the emulation electric capacity of 470 μ, the C1 and C2 in Fig. 5
Adopt capacity for 220 μ emulation electric capacity；Meanwhile, it is 1.2 that the load end in Fig. 3,4,5 adopts initial value for 0, pulsating quantity,
Time delay is 10ns, the rise time is 2 μ s, and fall time is 10ns, and pulse width is 10ns, and the cycle is the exemplary pulse source of 4 μ s
(PULSE (0 1.2 10n, 2 μ 10n 10n, 4 μ) as depicted).
Assume to represent with V1 and load in the circuit that the second road power supply as illustrated in FIG. 3 is powered to the load by all wave rectification
Place's voltage, electricity at load is represented in circuit that the second road power supply as illustrated in FIG. 4 is powered to the load by halfwave rectifier with V2
Pressure, represents the multiple feed circuit that the second road power supply as illustrated in FIG. 5 is provided according to this utility model embodiment with V3
Voltage at load in the circuit that technical scheme powers to the load；
And assume to represent with I1 and bear in the circuit that the second road power supply as illustrated in FIG. 3 is powered to the load by all wave rectification
Electric current at load, represented with I2 in circuit that the second road power supply as illustrated in FIG. 4 is powered to the load by halfwave rectifier at load
Electric current, represents the multiple feed circuit that the second road power supply as illustrated in FIG. 5 is provided according to this utility model embodiment with I3
The circuit that powers to the load of technical scheme in electric current at load:
Fig. 6 (a) is shown based on the time dependent simulation result schematic diagram of voltage at circuit load shown in Fig. 3；Fig. 6
B () is shown based on the time dependent simulation result schematic diagram of voltage at circuit load shown in Fig. 4；Fig. 6 (c) shows and is based on
The time dependent simulation result schematic diagram of voltage at circuit load shown in Fig. 5；
Fig. 7 (a) is shown based on the time dependent simulation result schematic diagram of electric current on circuit diode D6 shown in Fig. 3；
Fig. 7 (b) is shown based on the time dependent simulation result schematic diagram of electric current on circuit diode D5 shown in Fig. 4；Fig. 7 (c) shows
Go out based on the time dependent simulation result schematic diagram of electric current on circuit diode D1 shown in Fig. 5.
By seeing that above-mentioned simulation result can will be apparent that, as shown by Fig. 7 (c) based on the pole of circuit two shown in Fig. 5
On pipe D1 the peak value of electric current compared to as shown by Fig. 7 (a) based on electric current on circuit diode D6 shown in Fig. 3 and such as Fig. 7
Shown by (b) based on electric current on circuit diode D5 shown in Fig. 4 for, current peak substantially diminishes, therefore, it is possible to improve work(
Rate factor, reduces total harmonic distortion, and reduces diode and external adapter stress, so as to the second road power supply as input can
To adopt the adapter of more small current.
Can see, the advantage that the technical scheme of the multiple feed provided by embodiment of the present utility model can be brought
Include, circuit structure is simple, compared to original scheme (than scheme as shown in Figure 1), by first via power supply and second
Extra combining part is not needed when the power supply combining of road, i.e., need not additionally be used electric capacity or diode, can be reduced complete
Ripple rectification circuit and the diode of combining part, so as to lift DC and AC power supplies power supplying efficiency (by actual conventional efficient quilt
Nearly 20%) proof can be lifted；Simultaneously, additionally it is possible to, reduce the strong current spike brought because of halfwave rectifier, improve circuit
Power factor (0.9 can be lifted from 0.67 by the power factor of actual experimental circuit), and the second tunnel can be slowed down
The source of power supply, the such as stress of outsourcing AC adapters, also can further reduce diode current and electrochemical capacitor voltage
Stress, and improve because of EMI problems caused by diode current distortion.
In the multiple feed circuit provided by some preferred embodiments of the present utility model, passive PFC valley fill circuits
Inductance L1 can be further included in 204 also, so as to further reduce the current spike that halfwave rectifier is brought.
Wherein, inductance L1 can specifically be connected to the negative pole and the second electric capacity C2 of the first unilateal conduction device positive pole it
Between.
Fig. 8 shows the electricity for including inductance L1 that the second road power supply is provided according to other embodiment of the present utility model
Road emulates schematic diagram.As shown in figure 8, the negative pole of diode D2 is connected with the positive pole of the second electric capacity C2 especially by inductance L1.
Further, similar with the aforementioned emulation to Fig. 3, Fig. 4, Fig. 5 and simulation result, Fig. 9 (a) is shown based on figure
The time dependent simulation result schematic diagram of voltage at circuit load shown in 8；Fig. 9 (b) is shown based on the pole of circuit two shown in Fig. 8
The time dependent simulation result schematic diagram of electric current on pipe D1：
Can see, the peak value based on electric current on circuit diode D1 shown in Fig. 8 as shown by Fig. 9 (b) is compared to such as
Shown by Fig. 7 (c) based on electric current on circuit diode D1 shown in Fig. 5 for, current peak further reduces, thus as scheme
The multiple feed circuit provided by this utility model embodiment shown by 8 is by including the passive PFC Fill valleys of inductance L1
Circuit can further improve power factor (PF), reduce total harmonic distortion.
In sum, the technical scheme of the multiple feed circuit provided by embodiment of the present utility model is by using partly
Ripple rectification circuit and passive PFC valley fill circuits, realize the optimization to existing multiple feed circuit solutions, by adopting
Making the second road power supply first pass through half-wave rectifying circuit and passive PFC valley fill circuits carries out correcting current, can reduce because half-wave is whole
The current spike that stream brings, improves the power factor of circuit, and then can improve circuit efficiency, and can slow down the device in circuit
Part stress (such as diode stress, capacitance voltage stress and externally fed adapter stress), and can improve because of diode
EMI problems caused by current distortion.Also, compared with traditional multiple feed circuit, what this utility model embodiment was provided
The circuit structure of multiple feed circuit is simpler, and the second road power supply need not be connected volume when with first via power supply in combining
Outer electric capacity or diode, reduce loop of power circuit diode assembly, and lift the second road power supply unidirectional current or alternating current
Efficiency.
Although having been described for preferred embodiment of the present utility model, those skilled in the art once learn basic wound
The property made concept, then can make other change and modification to these embodiments.So, claims are intended to be construed to include
Preferred embodiment and fall into the had altered of this utility model scope and change.
Obviously, those skilled in the art can carry out various changes and modification without deviating from this practicality to this utility model
New spirit and scope.So, if it is of the present utility model these modification and modification belong to this utility model claim and
Within the scope of its equivalent technologies, then this utility model is also intended to comprising these changes and modification.
Claims (10)
1. a kind of multiple feed circuit, it is characterised in that including half-wave rectifying circuit, PPFC valley fill circuit
And direct current DC-DC change-over circuits：
The input of the DC-DC change-over circuits is connected to first via power supply；
The input of the half-wave rectifying circuit is connected to the second road power supply；The outfan of the half-wave rectifying circuit is connected to institute
State the input of PPFC valley fill circuit；The input of the DC-DC change-over circuits is connected to the passive work(
The outfan of rate factor correcting valley fill circuit.
2. multiple feed circuit as claimed in claim 1, it is characterised in that the half-wave rectifying circuit includes unidirectional
Electrical part；
The positive pole of the unilateal conduction device is connected to second road power supply, and the negative pole of the unilateal conduction device is connected to institute
State the input of PPFC valley fill circuit.
3. multiple feed circuit as claimed in claim 1, it is characterised in that the PPFC valley fill circuit
Include the first unilateal conduction device, the second unilateal conduction device, the 3rd unilateal conduction device, the first electric capacity and the second electric capacity；
The negative pole of the first unilateal conduction device is connected to the outfan of the half-wave rectifying circuit, and with second electric capacity
Positive pole connection；The positive pole of the first unilateal conduction device and the negative pole of the second unilateal conduction device and described
The positive pole connection of one electric capacity；The negative pole of the positive pole of the second unilateal conduction device and the 3rd unilateal conduction device and
The negative pole connection of second electric capacity；The negative pole of first electric capacity is all connected to the positive pole of the 3rd unilateal conduction device
Ground；The positive pole of second electric capacity is connected to the input of the DC-DC change-over circuits.
4. multiple feed circuit as claimed in claim 3, it is characterised in that the capacity of first electric capacity and described second
The capacity of electric capacity is identical.
5. multiple feed circuit as claimed in claim 3, it is characterised in that the PPFC valley fill circuit
In also include inductance；The negative pole of the first unilateal conduction device is connected with the positive pole of second electric capacity by the inductance.
6. multiple feed circuit as claimed in claim 1, it is characterised in that the first via supply voltage is higher than described the
Two road supply voltages.
7. multiple feed circuit as claimed in claim 1, it is characterised in that the first via power supply is POE
POE 48V power supplys；Exchange AC 24V power supplys or direct current DC 12V power supplys that second road power supply is provided for adapter.
8. multiple feed circuit as claimed in claim 1, it is characterised in that the input voltage of the DC-DC change-over circuits
Scope is 5V to 63V.
9. multiple feed circuit as claimed in claim 2, it is characterised in that the unilateal conduction device is diode.
10. the multiple feed circuit as any one of claim 3-5, it is characterised in that first unilateal conduction
Device, the second unilateal conduction device and the 3rd unilateal conduction device are diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620665765.1U CN206099374U (en) | 2016-06-24 | 2016-06-24 | Many mains operated circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620665765.1U CN206099374U (en) | 2016-06-24 | 2016-06-24 | Many mains operated circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206099374U true CN206099374U (en) | 2017-04-12 |
Family
ID=59975228
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620665765.1U Expired - Fee Related CN206099374U (en) | 2016-06-24 | 2016-06-24 | Many mains operated circuit |
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| Country | Link |
|---|---|
| CN (1) | CN206099374U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107070668A (en) * | 2017-04-14 | 2017-08-18 | 浙江大华技术股份有限公司 | A kind of power supply circuit |
| TWI768617B (en) * | 2020-12-24 | 2022-06-21 | 九暘電子股份有限公司 | Power over ethernet system having multiple power source devices and control device thereof |
-
2016
- 2016-06-24 CN CN201620665765.1U patent/CN206099374U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107070668A (en) * | 2017-04-14 | 2017-08-18 | 浙江大华技术股份有限公司 | A kind of power supply circuit |
| CN107070668B (en) * | 2017-04-14 | 2020-02-14 | 浙江大华技术股份有限公司 | Power supply circuit |
| TWI768617B (en) * | 2020-12-24 | 2022-06-21 | 九暘電子股份有限公司 | Power over ethernet system having multiple power source devices and control device thereof |
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