CN207124568U - Voltage conversion circuit and battery charger - Google Patents
Voltage conversion circuit and battery charger Download PDFInfo
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- CN207124568U CN207124568U CN201721069011.0U CN201721069011U CN207124568U CN 207124568 U CN207124568 U CN 207124568U CN 201721069011 U CN201721069011 U CN 201721069011U CN 207124568 U CN207124568 U CN 207124568U
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Abstract
The utility model discloses a kind of voltage conversion circuit and battery charger.The voltage conversion circuit includes the first conductive branch, the second conductive branch and the 3rd conductive branch and the first electric capacity for being changed the power supply signal of input, also include the one or four switch and the second electric capacity, first, second switchs the conversion for controlling second, third conducting channel whether to carry out voltage signal, and third and fourth is switched for whether the second electric capacity being accessed into second and third conductive branch.When first and second switch is in the state that electrically conducts, when third and fourth switch is in electrical cut-off state, voltage conversion circuit is in multiphase input pattern, and the one or three conductive branch, which coordinates, to be carried out three phase mains signal and export；When first and second switch be in electrical cut-off state, third and fourth switch be in electrically conduct state when, voltage conversion circuit is in single-phase input pattern, and power supply signal is changed and exported by the first conductive branch.Voltage after conversion is filtered processing by the first electric capacity.
Description
Technical field
Voltage conversion technical field is the utility model is related to, more particularly to direct current is converted to applied to exchange or direct current turns
Change the battery charger field of direct current, and in particular to a kind of voltage conversion circuit and battery charger.
Background technology
With extensive use of the portable electron device in production, life, big more options can in portable electron device
The rechargeable battery of recharge is as its driving source.So, by charging circuit that rechargeable battery is charged also therewith meeting the tendency of and
It is raw.However, charging circuit can only select AC power to be charged at present, and directly can not be filled from direct-flow storage battery
Electricity, that is to say can not collect many phase alternating current (two-phase or three-phase alternating current, 220V/50Hz) simultaneously enters with single-phase DC power supply
The function of row voltage conversion, thus cause charging circuit in-convenience in use, user experience is poor.
Utility model content
To solve aforementioned technical problem, the utility model provides voltage a kind of easy to use and higher user experience and turned
Change circuit.
Further, the utility model also provides the battery charger with aforesaid voltage change-over circuit.
A kind of voltage conversion circuit, including the first electric capacity, the first conductive branch parallel with one another, the second conductive branch and the
Three conductive branch and the first output end, the second output end for outputting drive voltage.The voltage conversion circuit includes the
One switch, second switch, the 3rd switch, the 4th switch and the second electric capacity, the first switch are electrically connected at described second
The input of the power supply signal of conductive branch, the second switch are electrically connected at the power supply signal of the 3rd conductive branch
Input, the 3rd switch is electrically connected at second conductive branch and the first electrode end of second electric capacity, described
4th switch is electrically connected at the 3rd conductive branch and the first electrode end, the second electrode end electricity of second electric capacity
Property connection second output end, first electric capacity be electrically connected at first output end and second output end it
Between.
When the first switch and the second switch are in the state that electrically conducts, and the 3rd switch and the 4th switch
During in electrical cut-off state, the voltage conversion circuit is in multiphase input pattern, first conductive branch, the second conduction
Branch road and the 3rd conductive branch receive three phase mains signal and by the three-phase electricity from the input of the power supply signal respectively
Source signal is converted to driving voltage and exports the driving voltage from first output end and second output end；
When the first switch and the second switch are in electrical cut-off state, and the 3rd switch and the described 4th
Switch in electrically conduct state when, the voltage conversion circuit is in single-phase input pattern, first conductive branch from its
The input of power supply signal receives single phase poaer supply signal and is converted to the driving voltage via first conductive branch, and described the
Two conductive branch, the 3rd conductive branch, second electric capacity and first output end and second output end are defeated
Go out to form galvanic circle.
It is preferred that when the voltage conversion circuit is in single-phase input pattern and when the voltage of first output end is more than
During threshold voltage, first output end is alternately through second conductive branch and the 3rd conductive branch and described second
Capacitors conductive is reduced to threshold voltage to form reduction voltage circuit, by the voltage of first output end.
It is preferred that when the voltage conversion circuit is in single-phase input pattern and when the voltage of first output end is less than
During threshold voltage, first output end is alternately through second conductive branch and the 3rd conductive branch and described second
Capacitors conductive is to form booster circuit, by the voltage increase of first output end to the threshold voltage.
It is preferred that the first input end, second defeated that the voltage conversion circuit also includes being used for receiving the power supply signal
Enter end and the 3rd input, first conductive branch include the first conducting end, the first energy storage inductor, the first rectifier cell,
Second rectifier cell, first conducting end is electrically connected at one end of the first input end and the first energy storage inductor, described
The other end of first energy storage inductor is electrically connected with the first connection end, and first rectifier cell is electrically connected with first connection end
With first output end, second rectifier cell is electrically connected with first connection end and second output end, described
First rectifier cell is connected with the second rectifier cell by first connection end.It is conductive that second conductive branch includes second
End, the second energy storage inductor, the 3rd rectifier cell, the 4th rectifier cell, second conducting end are electrically connected at described first and opened
Close and the 3rd switch, the 3rd rectifier cell are electrically connected with second connection end and first output end, second energy storage
Inductance is electrically connected at second conducting end and second connection end, and the 4th rectifier cell is electrically connected with second connection
End and second output end, the 3rd rectifier cell are connected with the 4th rectifier cell by the second connection end.
3rd conductive branch includes the 3rd conducting end, and the 3rd energy storage inductor, the 5th rectifier cell and the 6th rectifier cell are described
3rd conducting end is electrically connected at the second switch and the 4th switch, and the 3rd energy storage inductor is electrically connected with the described 3rd and led
Electric end and the 3rd connection end, the 5th rectifier cell is electrically connected with the 3rd connection end and first output end, described
6th rectifier cell is electrically connected with the 3rd connection end and second output end, the 5th rectifier cell and the described 6th
Rectifier cell is connected by the 3rd connection end.
It is preferred that when the voltage conversion circuit is in single-phase input pattern and when the voltage of first output end is more than
During threshold voltage, the 3rd rectifier cell in second conductive branch replaces in the first sub- time with the 4th rectifier cell
Section is in the state that electrically conducts with the second sub- period, and first output end passes through the 3rd rectifier cell, described second
Energy storage inductor, the 3rd switch, second electric capacity and the 4th rectifier cell form galvanic circle, and by described in
The power storage of first output end in second electric capacity, wherein, the first sub- period and the described second sub- period
For the continuous and adjacent period.
It is preferred that when the voltage conversion circuit is in single-phase input pattern and when the voltage of first output end is more than
During threshold voltage, the 5th rectifier cell in the 3rd conductive branch replaces with the 6th rectifier cell in the 3rd son
Period and the 4th sub- period are in the state that electrically conducts, and first output end passes through the 5th rectifier cell, described
3rd energy storage inductor, the 4th switch, second electric capacity and the 6th rectifier cell form galvanic circle, and will
The power storage of first output end in second electric capacity, wherein, the 3rd sub- period and the 4th period of the day from 11 p.m. to 1 a.m
Between section be the continuous and adjacent period.
It is preferred that when the voltage conversion circuit is in single-phase input pattern and when the voltage of first output end is less than
During threshold voltage, corresponding second conductive branch；
In the 5th sub- period, the 3rd rectifier cell is in cut-off state, and the 4th rectifier cell is on
State, second electric capacity, the 3rd switch, second energy storage inductor and the 4th rectifier cell form conductive return
Road, and second electric capacity will store electric energy transfer into second energy storage inductor；And
In the 6th sub- period, the 3rd rectifier cell is in the conduction state, and the 4th rectifier cell is in cut-off
State, second electric capacity, the 3rd switch, second energy storage inductor, the 3rd rectifier cell and first output
End forms galvanic circle, and second electric capacity exports the electric energy transfer of storage to described first with second energy storage inductor
End, wherein, the 5th sub- period and the 6th sub- period are the continuous and adjacent period.
It is preferred that when the voltage conversion circuit is in single-phase input pattern and when the voltage of first output end is less than
During threshold voltage,
In the 7th sub- period, the 5th rectifier cell is in cut-off state, and the 6th rectifier cell is on
State, second electric capacity, the 4th switch, the 3rd energy storage inductor and the 6th rectifier cell form conductive return
Road, and second electric capacity will store electric energy transfer into the 3rd energy storage inductor；And
In the 8th sub- period, the 5th rectifier cell is in the conduction state, and the 6th rectifier cell is in cut-off
State, second electric capacity, the 4th switch, the 3rd energy storage inductor, the 5th rectifier cell and first output
End forms galvanic circle, and second electric capacity exports the electric energy transfer of storage to described first with the 3rd energy storage inductor
End, wherein, the 7th sub- period and the 8th sub- period are the continuous and adjacent period.
It is preferred that first-the six rectifier cell is device for power switching, first and second switch is single-pole double throw
Switch, described third and fourth are opened as single-pole double-throw switch (SPDT).
A kind of battery charger, including aforesaid voltage change-over circuit.
Compared to prior art, the voltage conversion circuit in the utility model passes through first, second, third, fourth switch
Control allow voltage conversion circuit according to needing to select multi-phase AC power or single-phase DC power supply as input electricity
Pressure, so as to effectively increase voltage conversion circuit ease of use.Further, due to only with four switches and the second electricity
Hold enable to first, second output end export driving voltage carry out energy storage filtering so that the ripple current of driving voltage compared with
Small and stability is higher, while component size is smaller, and then make it that the overall volume of voltage conversion circuit is smaller.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
Or the required accompanying drawing used is briefly described in description of the prior art, it should be apparent that, drawings in the following description are only
It is some embodiments of the utility model, for those of ordinary skill in the art, is not paying the premise of creative work
Under, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the circuit structure diagram of voltage conversion circuit in the embodiment of the utility model one；
Fig. 2 is the working timing figure that voltage conversion circuit shown in Fig. 1 is under single-phase input pattern the first state；
Fig. 3 is the working timing figure that voltage conversion circuit shown in Fig. 1 is under second of state of single-phase input pattern.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describing, it is clear that described embodiment is only the utility model part of the embodiment, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment obtained, belong to the scope of the utility model protection.
Referring to Fig. 1, it is the circuit structure diagram of voltage conversion circuit in the embodiment of the utility model one.
As shown in figure 1, voltage conversion circuit 10 is used to the power supply signal of reception being converted to driving voltage, the power supply letter
It number can be three-phase ac signal or single-phase DC signal, that is to say that voltage conversion circuit 10 includes multiphase input mould
Formula and single-phase input pattern.The voltage conversion circuit 10 may be directly applied in battery charger 1.
Specifically, voltage conversion circuit 10 includes being used for first input end 10a, the second input for receiving power supply signal
10b, the 3rd input 10c and the first output end 10i and the second output end 10j for outputting drive voltage.Wherein,
One input 10a, the second input 10b, the 3rd input 10c are used to receive three-phase alternating current source signal or single-phase direct current
Voltage signal.The first output end 10i and the second output end 10j is used to export the driving voltage obtained after conversion extremely load
RL。
Voltage conversion circuit 10 also includes parallel with one another and for the power supply signal to be changed first conductive branch
Road 101, the second conductive branch 102, the 3rd conductive branch 103, and also opened including the first electric capacity C1, first switch K1, second
Close K2, the 3rd switch K3, the 4th switch K4, the second electric capacity C2.
First electric capacity C1 is electrically connected between the first output end 10i and the second output end 10j.First conductive branch 101
It is electrically connected between the first input end 10a and the first output end 10i, the second output end 10j.Second is conductive
Branch road 102 is electrically connected between the second input 10b and the first output end 10i, the second output end 10j.3rd conductive branch
103 are electrically connected between the 3rd input 10c and the first output end 10i, the second output end 10j.First electric capacity C1 is used for pin
Voltage regulation filtering processing is carried out to the voltage of the first conductive branch 10a outputs, to be exported from the first output end 10i and the second output end
The waveform of the driving voltage of 10j outputs is steady.
First switch K1 is electrically connected between the second input 10b and the second conductive branch 102, for optionally will
Second input 10b electrically conducts or electrically disconnected with the second conductive branch 102.
Second switch K2 is electrically connected between the 3rd input 10c and the 3rd conductive branch 103, for optionally will
3rd input 10c electrically conducts or electrically disconnected with the 3rd conductive branch 103.
3rd switch K3 is electrically connected at the second conductive branch 102 and the second electric capacity C2 first electrode end E1,
4th switch K4 is electrically connected at the 3rd conductive branch 103 and the second electric capacity C2 first electrode end E1, the second electricity
The second electrode end E2 for holding C2 is electrically connected with the second output end 10j.
When first switch K1 and second switch K2 are in the state that electrically conducts, and the 3rd switch K3 switchs K4 with the 4th and is in
During electrical cut-off state, that is to say that the second conductive branch 102 electrically conducts with the second input 10b, the 3rd conductive branch 103 with
3rd input 10c electrically conducts, and the second electric capacity C2 and the conductive branch 103 of the second conductive branch 102 and the 3rd are electrical
During disconnection, voltage conversion circuit 10 is in multiphase input pattern, first, second, third conductive branch 101,102,103 respectively from
First, second, third input 10a, 10b and 10c receives three phase mains signal, then first, second, third conductive branch
101st, 102,103 cooperate three phase mains signal is converted into the driving voltage, the driving voltage is from the first output end
10i and the second output end output 10j are exported to load RL.
When first switch K1 and second switch K2 be in electrical cut-off state, and the 3rd switch K3 and the 4th switchs K4 and is in
During the state that electrically conducts, that is to say that the second conductive branch 102 electrically disconnects with the second input 10b, the 3rd conductive branch 103 with
3rd input 10c electrically disconnects, when the second electric capacity C2 and the second conductive branch 102, the 3rd conductive branch 103 electrically conduct,
Voltage conversion circuit 10 is in single-phase input pattern, that is to say and is only received directly from first input end 10a by the first conductive branch 101
Single phase poaer supply signal is flowed, and carries out being converted to the drive by the direct-current single-phase power supply signal by the first conductive branch 101
Dynamic voltage, the driving voltage are exported to load RL from the first output end 10i and the second output end output 10j.
Second electric capacity C1, the first-the four switch K1-K4, the second conductive branch 10b and the 3rd conductive branch 10c are used for
The first electric capacity C1 being connected between the first output end 10i and the second output end output 10j driving voltages exported are stored up
Can or release can so that the waveform of the first electric capacity C1 from the first output end 10i and the second output end 10j driving voltages exported is put down
Surely.
More specifically, the first conductive branch 101 includes the first conducting end 101a, the first energy storage inductor LS1, the first rectification
Element SW1, the second rectifier cell SW2, wherein, the first conducting end 101a is electrically connected at first input end 10a, the first energy storage electricity
Feel LS1 one end and be electrically connected with the first conducting end 101a, the other end is electrically connected with the first connection end 101b.First rectifier cell SW1
It is electrically connected with the first connection end 101b and the first output end 10i.Second rectifier cell SW2 be electrically connected with the first connection end 101b with
Second output end 10j.It is defeated that first rectifier cell SW1 and the second rectifier cell SW2 by the first connection end 101b is connected on first
Go out to hold between 10i and the second output end 10j.
Second conductive branch 102 includes the second conducting end 102a, the second energy storage inductor LS2, the 3rd rectifier cell SW3, the
Four rectifier cell SW4.Second conducting end 102a is electrically connected at the switches of first switch K1 and the 3rd K3.Second energy storage inductor LS2
One end is electrically connected with the second conducting end 102a, and the other end is electrically connected with second connection end 102b.3rd rectifier cell SW3 electrically connects
Meet second connection end 102b and the first output end 10i.It is defeated that 4th rectifier cell SW4 is electrically connected with second connection end 102b and second
Go out to hold 10j.3rd rectifier cell SW3 and the 4th rectifier cell SW4 are connected on the first output end 10i by second connection end 10b
Between the second output end 10j.
3rd conductive branch 103 includes the 3rd conducting end 103a, the 3rd energy storage inductor LS3, the 5th rectifier cell SW5 and
6th rectifier cell SW6.Wherein, the 3rd conducting end 103a is electrically connected at the switches of second switch K2 and the 4th K4.3rd energy storage
Inductance LS3 one end is electrically connected with the 3rd conducting end 103a, and the other end is electrically connected with the 3rd connection end 103b.5th rectifier cell
SW5 is electrically connected with the 3rd connection end 103b and the first output end 10i.6th rectifier cell SW6 is electrically connected with the 3rd connection end
103b and the second output end 10j.5th rectifier cell SW5 and the 6th rectifier cell SW6 are gone here and there by the 3rd connection end 103b
It is associated between the first output end 10i and the second output end 10j.In embodiment of the present utility model, the voltage conversion circuit
10 also include the 4th input 10d and the 4th conductive branch 104, and the 4th conductive branch 104 is with described first, second, the
Three conductive branch 101,102,103 are parallel with one another.Wherein, the 4th input 10d is used for input reference voltage (N).This reality
Apply in example, reference voltage is ground voltage.4th conductive branch 104 is used to provide with reference to electricity for voltage conversion circuit 10
Pressure.
Wherein, the 4th conductive branch 104 includes the 7th rectifier cell SW7 and the 8th rectifier cell SW8.Wherein,
The 7th rectifier cell SW7 and the 8th rectifier cell SW8 is serially connected, the 7th rectifier cell SW7 and the 8th rectification member
Node definition between part SW8 is the 4th connection end 104b, and the 4th connection end 104b is directly electrical with the 4th input 10d
Connection, for receiving reference voltage.The 7th rectifier cell SW7 and the 8th rectifier cell SW8 is connected on the first output
Between the 10i and the first output end 10j of end.
In the present embodiment, the first switch K1 and second switch K2 synchronization actions, that is to say at the same perform turn on or
The action of cut-off.3rd switch K3 and the 4th switch K4 synchronization actions, that is to say while perform the action of on or off.Compared with
Goodly, first switch K1 and second switch K2 can use single-pole double-throw switch (SPDT) to realize.3rd switch K3 and the 4th switch K4 can
To be realized using single-pole double-throw switch (SPDT).
First to the 8th rectifier cell SW1-SW8 is device for power switching, and the device for power switching includes but is not limited to
Mos field effect transistor (Metal-Oxide-Semiconductor Field-Effect
Transistor, MOSFET) or insulated gate bipolar transistor (Insulated Gate Bipolar Transistor,
IGBT) etc..Wherein, described first, the three, the five, the 7th rectifier cell SW1, SW3, SW5, SW7 drain electrode is as conduction terminals,
Its with the first output end 10i be electrically connected with, described first, the three, the five, the 7th rectifier cell SW1, SW3, SW5,
For SW7 source electrode as conduction terminals, it is electrical with first, second, third, fourth connection end 101b, 102b, 103b, 104b respectively
Connection；Described second, the four, the six, the 8th rectifier cell SW2, SW4, SW6, SW8 source electrode is as conduction terminals, and it is and institute
State the second output end 10j electric connections, described second, the four, the six, the 8th rectifier cell SW2, SW4, SW6, SW8 drain electrode
As conduction terminals, it is electrically connected with respectively at first, second, third, fourth connection end 101b, 102b, 103b, 104b；First
To the 8th metal-oxide-semiconductor grid then receive control signal be used for control the first to the 8th rectifier cell SW1-SW8 electrically conduct and
Electrically cut-off.
It is although conductive with first when voltage conversion circuit 10 is in single-phase input pattern it is appreciated that in the present embodiment
Branch road 10a is led as the conductive branch for receiving power supply signal, two other conductive branch as the auxiliary of the first electric capacity C1 voltage stabilizings
Electric branch road, the second conductive branch 10b and the additional conductive branch road of the 3rd conductive branch 10c the first electric capacity C1 voltage stabilizings are that is to say, but
It is that during in the present invention, other change embodiments, the second conductive branch 10b or the 3rd conductive branch 10c can also be used as and receive
The conductive branch of power supply signal, and additional conductive branch road of the two other conductive branch as the first electric capacity C1 voltage stabilizings, that is to say
First conductive branch 10a and the 3rd conductive branch 10c, or the first conductive branch 10a and the second conductive branch 10b, as
The additional conductive branch road of one electric capacity C1 voltage stabilizings.
Referring to Fig. 2, it is the work that voltage conversion circuit 10 shown in Fig. 1 is under single-phase input pattern the first state
Timing diagram.
With reference to shown in Fig. 1 and Fig. 2, when the voltage conversion circuit is in single-phase input pattern, it that is to say that only first leads
Electric branch road 101 receives direct-current single-phase power supply signal from first input end 10a, and by the first energy storage inductor LS1 with replacing place
In the first rectifier cell SW1 and the second rectifier cell SW2 of conducting state, so as to which power supply signal is converted to from the first output end
The driving voltage of 10i and the second output end 10j outputs.In the present embodiment, the first output end 10i is high-pressure side, has voltage Vo；
Second output end 10j is low-pressure end, and the voltage that the low-pressure end has is 0V reference voltage.
And when the voltage Vo of the first output end 10i is more than threshold voltage vt h, electrically connect with the first output end 10i
By the electric capacity C2 of the second conductive branch 102 and second or pass through the 3rd and conductive prop up to the first electric capacity C1 alternate cycles connect
Road 103 turns on the second electric capacity C2 and forms reduction voltage circuit (buck circuits), in other words in an output end of period first
10i is turned on the second electric capacity C2 by second conductive branch 102 and is formed reduction voltage circuit, then adjacent next
The first output end 10i was turned on the second electric capacity C2 by the 3rd conductive branch 103 and was formed reduction voltage circuit period, so that will
The electric energy that first electric capacity C1 is stored is stored to the second electric capacity C2 from the first output end 10i, to cause the first output
End 10i voltage is reduced to threshold voltage vt h, that is to say that the second conductive branch 102 and the 3rd conductive branch 103 form energy storage and returned
Road.
In the present embodiment, when first, second conductive branch 102,103 forms buck circuits, with one of them work week
The in running order period 1 P1 of the second conductive branch 102 for including in phase and the 3rd conductive branch 103 are in work shape
Workflow is illustrated exemplified by the second round P2 of state.
In period 1 P1, the second conductive branch 102 is in running order.The 3rd rectification in second conductive branch 102
Element SW3 replaces with the 4th rectifier cell SW4 in the state that electrically conducts.
Specifically, the first sub- period t1, the first output end 10i, the 3rd rectifier cell being connected with the first electric capacity C1
SW3, the second energy storage inductor LS2, the 3rd switch K3, the second electric capacity C2, the second output end 10j being connected with the first electric capacity C1, the
One electric capacity C1 forms galvanic circle, that is to say for circuit element, conductive branch is：C1→SW3→LS2→K3→C2→
C1 forms galvanic circle, so as to by the power storage of the first electric capacity C being electrically connected with the first output end 10i described the
In two electric capacity C2.
Second sub- period t2, the second energy storage inductor LS2, the 3rd switch K3, the second electric capacity C2 and the 4th rectifier cell
SW4 forms galvanic circle, that is to say and forms afterflow branch road, for circuit element, afterflow branch road is：LS2→K3→C2→
SW4 → LS2, so that by energy transmission in the second electric capacity C2 into the second energy storage inductor LS2.
In first time period t1 and second time period t2, the 3rd rectifier cell SW3, the second energy storage inductor LS2, the 3rd switch
K3, the second electric capacity C2 and the 4th rectifier cell SW4 form afterflow passage.
In second round P2, the 3rd conductive branch 103 is in running order.
3rd sub- period t3, the first output end 10i being connected with the first electric capacity C1 pass through the 5th rectifier cell SW5,
Three energy storage inductor LS3, the 4th switch K4, the second output end 10j being connected with the first electric capacity C1 and the second electric capacity C2 are formed and led
Electrical circuit, it that is to say for circuit element, conductive branch is：C1 → SW5 → LS2 → K4 → C2 → C1, will it is described with
The power storage for the first electric capacity C that first output end 10i is electrically connected with is in the second electric capacity C2.
4th sub- period t4, the 3rd energy storage inductor LS3, the 4th switch K4, the second electric capacity C2 and the 6th rectifier cell
SW6 forms galvanic circle, that is to say and forms afterflow branch road, for circuit element, afterflow branch road is：LS3→K4→C2→
SW6 → LS2 with by energy transmission in the second electric capacity C2 into the 3rd energy storage inductor LS3.
In the 3rd time period t 3 and the 4th time period t 4, the 5th rectifier cell SW5, the 3rd energy storage inductor LS3,
4th switch K4, the second electric capacity C2 and the 6th rectifier cell SW6 form afterflow passage.
Wherein, in the present embodiment, period 1 P1 and second round P2 is in time to be continuous and unremitting.In addition,
In period 1 P1 and second round P2, the 3rd open SW3 and the 4th switch SW4 be complementary switch, the 5th switch SW5 is opened with the 6th
Pass SW6 is complementary switch, is worked in a manner of pulsewidth modulation (PWM).
Referring to Fig. 3, it is the work that voltage conversion circuit 10 shown in Fig. 1 is under second of state of single-phase input pattern
Timing diagram,.
In the present embodiment, when first, second conductive branch 102,103 forms booster circuit (Boost circuit), with wherein
The in running order period 3 P3 of the second conductive branch 102 for including in one work period and the 3rd conductive branch 103
Workflow is illustrated exemplified by running order period 4 P4.
When the first output end 10i voltage is less than threshold voltage vt h, first with the first output end 10i electric connections
Electric capacity C1 cycle alternations are by the electric capacity C2 of the second conductive branch 102 and second or pass through the 3rd conductive branch 103 and
Two electric capacity C2 are turned on and are formed Boost circuit, so as to by the second electric capacity C2 and second, third energy storage inductor LS2, LS3
The electric energy stored is back to the first electric capacity C1 and exported from the first output end 10i, to cause first output
End 10i voltage is increased to threshold voltage vt h, that is to say that the second conductive branch 102 and the 3rd conductive branch 103 form and release and can return
Road.
In the present embodiment, when first, second conductive branch 102,103 forms Boost circuit, with one of them work week
The in running order period 3 P3 of the second conductive branch 102 for including in phase and the 3rd conductive branch 103 are in work shape
Workflow is illustrated exemplified by the period 4 P4 of state.
In period 3 P3, second conductive branch 102 is in running order.
Cut-off state is in the 5th sub- period t5, the 3rd rectifier cell SW3, the 4th rectifier cell SW4 is in
Conducting state.The second electric capacity C2, the 3rd switch K3, the second energy storage inductor LS2 and the 4th rectifier cell SW4 form conduction
Loop, it that is to say for circuit element, galvanic circle is：C2 → K3 → LS2 → SW4 → C2, the second electric capacity C2 will be stored
Electric energy transfer is to the second energy storage inductor LS2.
In the 6th sub- period t6, the 3rd rectifier cell SW3 is in the conduction state, and the 4th rectifier cell SW4 is in
Cut-off state.The second electric capacity C2, the 3rd switch K3, the second energy storage inductor LS2, the 3rd rectifier cell SW3, the first output end
10i and the first electric capacity C1 forms galvanic circle, that is to say for circuit element, galvanic circle is：C2→K3→LS2→
SW3 → C1 → C2, the second electric capacity C2 and the second energy storage inductor LS2 by the electric energy transfer of storage transmit to the first output end 10i
In the first electric capacity C1 being electrically connected with, so as to supplement the electric energy of the first electric capacity C1 storages, the first output end 10i voltage is lifted extremely
Threshold voltage vt h.
In period 4 P4, the 3rd conductive branch 103 is in running order.
Cut-off state is in the 7th sub- period t7, the 5th rectifier cell SW5, the 6th rectifier cell SW6 is in
Conducting state.The second electric capacity C2, the 4th switch K4, the 3rd energy storage inductor LS3 and the 6th rectifier cell SW6 form conduction
Loop, it that is to say for circuit element, galvanic circle is：C2 → K4 → LS3 → SW6 → C2, the second electric capacity C2 will be stored
Electric energy transfer to the 3rd energy storage inductor LS3.
In the 8th sub- period t8, the 5th rectifier cell SW5 is in the conduction state, and the 6th rectifier cell SW6 is in
Cut-off state.The second electric capacity C2, the 4th switch K4, the 3rd energy storage inductor LS3, the 5th rectifier cell SW5, the first output end
10i and the first electric capacity C1 forms galvanic circle, that is to say for circuit element, galvanic circle is：C2→K4→LS3→
SW5 → C1 → C2, the second electric capacity C2 and the 3rd energy storage inductor LS3 by the electric energy transfer of storage transmit to first output end
In the first electric capacity C1 that 10i is electrically connected with, so as to supplement the electric energy of the first electric capacity C1 storages, the first output end 10i electricity is lifted
It is depressed into threshold voltage vt h.
It is appreciated that period 3 P3 and period 4 P4 is in time to be continuous and unremitting.
In the present embodiment, in period 3 P3 and period 4 P4, it is complementary switch that the 4th switch SW4 and the 3rd, which opens SW3,
6th switch SW6 and the 5th switch SW5 is complementary switch, is worked in a manner of pulsewidth modulation (PWM).
Compared to prior art, voltage conversion circuit 10 forms three-phase four-arm pulsewidth modulation rectification circuit, that is to say three
Bar live wire conductive branch inputs, the pulsewidth modulation rectification circuit that 1 zero line conductive branch inputs as the reference voltage.When voltage turns
Change circuit 10 and be in multiphase input pattern, voltage ripple is smaller, it is only necessary to which less electric capacity carries out energy storage energy rate, that is to say first
Electric capacity C1 can preferably realize energy storage and filtering effect.
But when an only phase inputs, such as the first conductive branch 10a is used as when inputting, the first electric capacity C1 is due to storage
Energy deficiency is difficult to support power output, and the conductive branch branch road of power supply signal need not be received in the first electric capacity C1 using two other
The energy sufficient stage that is to say power storage when the voltage difference at the first electric capacity C1 both ends is more than threshold value electricity in the second electric capacity C2
By power storage in the second electric capacity C2 when pressing Vth；And the electric energy that second electric capacity C2 is stored when the first electric capacity C1 energy is low relatively low
Supplement is discharged to the first electric capacity C1, that is to say the when the voltage difference at the first electric capacity C1 both ends is less than threshold voltage vt h
The electric energy stored in two electric capacity C2 is supplemented to the first electric capacity C1, so as to maintain the first output end 10i for being connected with the first electric capacity C with
And second output end 10j output driving voltage.It can be seen that increasing by four switch elements and second electric capacity, you can
First electric capacity C1 is in the energy storage of high peak energy period in the second electric capacity C2, is discharged in advance in the first electric capacity C1 energy low-valley intervals
The first electric capacity C1 is given in the energy supplement of storage, preferably maintains the drive of the first output end 10i and the output of the second output end 10
Dynamic voltage, and enable the first electric capacity C preferably to carry out energy storage and filter the ripple electricity that can also effectively reduce driving voltage
Pressure so that the ripple point auntie of driving voltage is smaller and stability is higher.
Meanwhile the voltage conversion circuit 10 is opened by first switch K1, second switch K2, the 3rd switch K3 and the 4th
The control for closing K4 allows voltage conversion circuit 10 according to needing to select multi-phase AC power or single-phase DC power supply conduct
Input voltage, so as to effectively increase the ease of use of voltage conversion circuit.Led using four switch K1-K4 selections first
Electric branch road 101 is used as single-phase DC Power convert, and can control the second conductive branch 102 and the with a second electric capacity C2 of unification
The first output end 10i and the second output end 10j driving voltages exported are adjusted by three conductive branch 103, that is to say
Driving voltage is formed into reduction voltage circuit or booster circuit, component size is smaller, and then causes the entirety of voltage conversion circuit 10
Small volume.In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or the feature for combining the embodiment or example description
Included at least one embodiment of the present utility model or example.In this manual, to the schematic representation of above-mentioned term
It is not necessarily referring to identical embodiment or example.Moreover, specific features, structure, material or the feature of description can be any
One or more embodiments or example in combine in an appropriate manner.
Specific case used herein is set forth to principle of the present utility model and embodiment, above example
Explanation be only intended to help and understand method and its core concept of the present utility model；Meanwhile for the general technology of this area
Personnel, according to thought of the present utility model, there will be changes in specific embodiments and applications, in summary,
This specification content should not be construed as to limitation of the present utility model.
Claims (10)
1. a kind of voltage conversion circuit, including the first electric capacity, the first conductive branch parallel with one another, the second conductive branch and the 3rd
Conductive branch and the first output end, the second output end for outputting drive voltage, it is characterised in that the voltage conversion electricity
Road includes first switch, second switch, third switch, the 4th switch and the second electric capacity, the first switch and is electrically connected at
The input of the power supply signal of second conductive branch, the second switch are electrically connected at the electricity of the 3rd conductive branch
The input of source signal, the 3rd switch are electrically connected at second conductive branch and the first electrode of second electric capacity
End, the 4th switch are electrically connected at the 3rd conductive branch and the first electrode end, and the second of second electric capacity
Electrode tip is electrically connected with second output end, and first electric capacity is electrically connected at first output end and described second defeated
Go out between end；
When the first switch with the second switch in the state that electrically conducts, and the 3rd switch is in the 4th switch
During electrical cut-off state, the voltage conversion circuit is in multiphase input pattern, first conductive branch, the second conductive branch
Three phase mains signal is received with the 3rd conductive branch from the input of the power supply signal respectively and believes the three phase mains
Number be converted to driving voltage and export the driving voltage from first output end and second output end；
When the first switch and the second switch are in electrical cut-off state, and the 3rd switch and the described 4th switch
In electrically conduct state when, the voltage conversion circuit is in single-phase input pattern, and first conductive branch is from its power supply
The input of signal receives single phase poaer supply signal and is converted to the driving voltage via first conductive branch, and described second leads
Electric branch road, the 3rd conductive branch, second electric capacity and first output end and second output end output structure
Into galvanic circle.
2. voltage conversion circuit according to claim 1, it is characterised in that when the voltage conversion circuit is in single-phase defeated
Enter pattern and when the voltage of first output end is more than threshold voltage, first electric capacity is conductive alternately through described second
Branch road forms reduction voltage circuit with second electric capacity or by the 3rd conductive branch and second capacitors conductive, will
The electric energy that first electric capacity is stored is stored into second electric capacity from first output end.
3. the voltage conversion circuit according to claims 1 or 2, it is characterised in that when the voltage conversion circuit is in
Single-phase input pattern and when the voltage of first output end is less than threshold voltage, first electric capacity is alternately through described
Two conductive branch are boosted with second electric capacity or by the 3rd conductive branch and second capacitors conductive to form
Circuit, the electric energy stored in second electric capacity is returned into first electric capacity and exported from first output end.
4. voltage conversion circuit according to claim 3, it is characterised in that the voltage conversion circuit also includes being used to connect
The first input end, the second input and the 3rd input of the power supply signal are received, first conductive branch includes first
Conducting end, the first energy storage inductor, the first rectifier cell, the second rectifier cell, first conducting end are electrically connected at described
One end of one input and the first energy storage inductor, the other end of first energy storage inductor is electrically connected with the first connection end, described
First rectifier cell is electrically connected with first connection end and first output end, and second rectifier cell is electrically connected with institute
The first connection end and second output end are stated, first rectifier cell and the second rectifier cell pass through first connection end
Series connection；
Second conductive branch includes the second conducting end, the second energy storage inductor, the 3rd rectifier cell, the 4th rectifier cell, institute
State the second conducting end and be electrically connected at the first switch and the 3rd switch, the 3rd rectifier cell is electrically connected with the second connection
End and first output end, second energy storage inductor is electrically connected at second conducting end and second connection end, described
4th rectifier cell is electrically connected with the second connection end and second output end, the 3rd rectifier cell and the described 4th
Rectifier cell is connected by the second connection end；
3rd conductive branch includes the 3rd conducting end, the 3rd energy storage inductor, the 5th rectifier cell and the 6th rectifier cell,
3rd conducting end is electrically connected at the second switch and the 4th switch, and the 3rd energy storage inductor is electrically connected with described the
Three conducting ends and the 3rd connection end, the 5th rectifier cell are electrically connected with the 3rd connection end and first output end,
6th rectifier cell is electrically connected with the 3rd connection end and second output end, the 5th rectifier cell with it is described
6th rectifier cell is connected by the 3rd connection end.
5. voltage conversion circuit according to claim 4, it is characterised in that when the voltage conversion circuit is in single-phase defeated
Enter pattern and when the voltage of first output end is more than threshold voltage, the 3rd rectifier cell in second conductive branch
Replace with the 4th rectifier cell and be in the state that electrically conducts in the first sub- period and the second sub- period, described first is defeated
Go out end and pass through the 3rd rectifier cell, second energy storage inductor, the 3rd switch, second electric capacity and described the
Four rectifier cells form galvanic circle, and by the power storage of first output end in second electric capacity, wherein, institute
It is the continuous and adjacent period to state the first sub- period and the described second sub- period.
6. voltage conversion circuit according to claim 5, it is characterised in that when the voltage conversion circuit is in single-phase defeated
Enter pattern and when the voltage of first output end is more than threshold voltage, the 5th rectification in the 3rd conductive branch
Element replaces with the 6th rectifier cell is in the state that electrically conducts in the 3rd sub- period and the 4th sub- period, and described the
One output end passes through the 5th rectifier cell, the 3rd energy storage inductor, the 4th switch, second electric capacity and the institute
State the 6th rectifier cell and form galvanic circle, and by the power storage of first output end in second electric capacity, its
In, the 3rd sub- period and the 4th sub- period are the continuous and adjacent period.
7. voltage conversion circuit according to claim 4, it is characterised in that when the voltage conversion circuit is in single-phase defeated
Enter pattern and when the voltage of first output end is less than threshold voltage, corresponding second conductive branch；
In the 5th sub- period, the 3rd rectifier cell is in cut-off state, and the 4th rectifier cell is in the conduction state,
Second electric capacity, the 3rd switch, second energy storage inductor and the 4th rectifier cell form galvanic circle, and
Second electric capacity will store electric energy transfer into second energy storage inductor；And
In the 6th sub- period, the 3rd rectifier cell is in the conduction state, and the 4th rectifier cell is in cut-off state,
Second electric capacity, the 3rd switch, second energy storage inductor, the 3rd rectifier cell and first output end are formed
Galvanic circle, and second electric capacity and second energy storage inductor be by the electric energy transfer of storage to first output end, its
In, the 5th sub- period and the 6th sub- period are the continuous and adjacent period.
8. voltage conversion circuit according to claim 7, it is characterised in that when the voltage conversion circuit is in single-phase defeated
Enter pattern and when the voltage of first output end is less than threshold voltage,
In the 7th sub- period, the 5th rectifier cell is in cut-off state, and the 6th rectifier cell is in the conduction state,
Second electric capacity, the 4th switch, the 3rd energy storage inductor and the 6th rectifier cell form galvanic circle, and
Second electric capacity will store electric energy transfer into the 3rd energy storage inductor；And
In the 8th sub- period, the 5th rectifier cell is in the conduction state, and the 6th rectifier cell is in cut-off state,
Second electric capacity, the 4th switch, the 3rd energy storage inductor, the 5th rectifier cell and first output end are formed
Galvanic circle, and second electric capacity and the 3rd energy storage inductor be by the electric energy transfer of storage to first output end, its
In, the 7th sub- period and the 8th sub- period are the continuous and adjacent period.
9. voltage conversion circuit according to claim 4, it is characterised in that first-the six rectifier cell is power
Switching device, first and second switch is single-pole double-throw switch (SPDT), and described third and fourth is opened as single-pole double-throw switch (SPDT).
10. a kind of battery charger, including the voltage conversion circuit as described in claim 1 to 9 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201721069011.0U CN207124568U (en) | 2017-08-24 | 2017-08-24 | Voltage conversion circuit and battery charger |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721069011.0U CN207124568U (en) | 2017-08-24 | 2017-08-24 | Voltage conversion circuit and battery charger |
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| CN207124568U true CN207124568U (en) | 2018-03-20 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019037028A1 (en) * | 2017-08-24 | 2019-02-28 | 深圳欣锐科技股份有限公司 | Voltage conversion circuit and battery charger |
| CN110406406A (en) * | 2018-04-26 | 2019-11-05 | 比亚迪股份有限公司 | Vehicular charger and electric vehicle |
| CN111355287A (en) * | 2020-03-23 | 2020-06-30 | 台达电子企业管理（上海）有限公司 | Vehicle-mounted charger |
| ES2780474A1 (en) * | 2019-02-22 | 2020-08-25 | Broad Telecom Sa | AC INVERTER CURRENT IN CONVERTER WITH POWER FACTOR CORRECTION, TRAINED TO OPERATE WITH SINGLE-PHASE AND THREE-PHASE LINES (Machine-translation by Google Translate, not legally binding) |
| US11677328B2 (en) | 2019-08-07 | 2023-06-13 | Huawei Digital Power Technologies Co., Ltd. | Converter and power supply system with simplified sampling |
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2017
- 2017-08-24 CN CN201721069011.0U patent/CN207124568U/en active Active
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019037028A1 (en) * | 2017-08-24 | 2019-02-28 | 深圳欣锐科技股份有限公司 | Voltage conversion circuit and battery charger |
| CN110178301A (en) * | 2017-08-24 | 2019-08-27 | 深圳欣锐科技股份有限公司 | Voltage conversion circuit and battery charger |
| CN110178301B (en) * | 2017-08-24 | 2021-07-16 | 深圳欣锐科技股份有限公司 | Voltage conversion circuit and battery charger |
| CN110406406A (en) * | 2018-04-26 | 2019-11-05 | 比亚迪股份有限公司 | Vehicular charger and electric vehicle |
| ES2780474A1 (en) * | 2019-02-22 | 2020-08-25 | Broad Telecom Sa | AC INVERTER CURRENT IN CONVERTER WITH POWER FACTOR CORRECTION, TRAINED TO OPERATE WITH SINGLE-PHASE AND THREE-PHASE LINES (Machine-translation by Google Translate, not legally binding) |
| EP3700072A1 (en) * | 2019-02-22 | 2020-08-26 | Broad Telecom S.A. | Ac-dc pfc converter for single-phase and three-phase operation |
| US11677328B2 (en) | 2019-08-07 | 2023-06-13 | Huawei Digital Power Technologies Co., Ltd. | Converter and power supply system with simplified sampling |
| CN111355287A (en) * | 2020-03-23 | 2020-06-30 | 台达电子企业管理（上海）有限公司 | Vehicle-mounted charger |
| CN111355287B (en) * | 2020-03-23 | 2022-04-08 | 台达电子企业管理（上海）有限公司 | Vehicle-mounted charger |
| US11605967B2 (en) | 2020-03-23 | 2023-03-14 | Delta Electronics (Shanghai) Co., Ltd. | On-board charger |
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