CN205666755U - DC convertor - Google Patents
DC convertor Download PDFInfo
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- CN205666755U CN205666755U CN201620131411.9U CN201620131411U CN205666755U CN 205666755 U CN205666755 U CN 205666755U CN 201620131411 U CN201620131411 U CN 201620131411U CN 205666755 U CN205666755 U CN 205666755U
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Abstract
The utility model provides a DC convertor. DC convertor includes voltage sharing unit and transfer circuit, and the transfer circuit includes first switch element, second switch unit, inductance unit, an unilateral conduction unit and the 2nd unilateral conduction unit, the inductance unit includes control module and two at least switched inductor, control module is used for when first switch element and second switch unit all switch on two at least switched inductor of control to connect in parallel in between normal phase transform voltage output end and the negative phase transform voltage output end, and switch on and shutoff of second switch unit or second switch unit switch on and control during the shutoff of first switch element when first switch element two at least switched inductor establish ties in normal phase transform voltage output end with between the negative phase transform voltage output end. The utility model discloses the requirement of circuit to switching element both ends stress carrying capacity has been reduced when having promoted voltage gain to can not produce the problem that efficiency reduces OR circuit volume and cost -push.
Description
Technical field
This utility model relates to DC converting technical field, particularly relates to a kind of DC converter.
Background technology
DC-DC (DC-to-dc) changer of high voltage conversion ratio is widely used in electric automobile, renewable energy system
And in continual battery backup system.The method of the voltage gain generally improving DC converter has at traditional DC-DC
Changer is chosen the dutycycle of extreme value or introduces the construction units such as transformator to promote the voltage gain of circuit.But, when
Dutycycle D is more than 0.9 or dutycycle D is less than in the case of 0.1, and the efficiency of DC-DC converter will reduce.It addition, work as
Do not require that in the DC-DC converter of isolation, the use of transformator will greatly increase the volume of circuit, cost.
Utility model content
Main purpose of the present utility model is to provide a kind of DC converter, to solve in prior art in boost conversion
During Shi Zengjia direct current conversion gain, the problem that meeting generation efficiency reduction or circuit volume and cost increase.
In order to achieve the above object, this utility model provides one and includes partial pressure unit and translation circuit, described dividing potential drop
Unit for direct voltage source provide DC voltage carry out dividing potential drop, described partial pressure unit include positive direct-current voltages input,
Negative dc voltage input and branch pressure voltage outfan；It is characterized in that, described translation circuit include the first switch element, second
Switch element, inductance unit, the first unilateal conduction unit and the second unilateal conduction unit, wherein, the first switch element is connected to
Between described positive direct-current voltages input and positive voltage of transformation outfan；Second switch unit is connected to described negative dc voltage
Between input and negative voltage of transformation outfan；
Described first unilateal conduction unit is connected to described branch pressure voltage outfan and described positive voltage of transformation outfan
Between；Described second unilateal conduction unit be connected to described negative voltage of transformation outfan and described branch pressure voltage outfan it
Between；
Described inductance unit be connected to described positive voltage of transformation outfan and described negative voltage of transformation outfan it
Between；Described inductance unit includes control module and at least two switched inductors；
Described control module for when described first switch element and second switch unit all turn on described in control at least
Two switched inductors are parallel between described positive voltage of transformation outfan and described negative voltage of transformation outfan, when described
The first switch element when one switching means conductive and described second switch unit turn off or when the conducting of described second switch unit
Control described at least two switched inductors during shutoff and be series at described positive voltage of transformation outfan and described negative voltage of transformation
Between outfan.
During enforcement, the control of described first switch element terminates into the first switch controlling signal, described second switch unit
Control terminate into second switch control signal, the dutycycle of described first switch controlling signal and described second switch control letter
Number dutycycle equal, the frequency of described first switch controlling signal and the frequency of described second switch control signal are equal, institute
State the phase place of the first switch controlling signal and the phase 180 degree of described second switch control signal, described first switch control
The dutycycle of signal processed is more than 0.5.
During enforcement, described first unilateal conduction unit is for controlling by described branch pressure voltage outfan to described positive phase inversion
The electric current of voltage output end passes through, and described second is unidirectionally controlled unit for controlling by described negative voltage of transformation outfan to institute
The electric current stating branch pressure voltage outfan passes through.
During enforcement, described first unilateal conduction unit includes the first clamp diode；Described second unilateal conduction unit bag
Include the second clamp diode；
The anode of described first clamp diode is connected with described branch pressure voltage outfan, described first clamp diode
Negative electrode is connected with described positive voltage of transformation outfan；
The anode of described second clamp diode is connected with described negative voltage of transformation outfan, described second clamper two pole
The negative electrode of pipe is connected with described branch pressure voltage outfan.
During enforcement, described inductance unit includes inductor module；
Described inductor module includes the first switched inductors, second switch inductance, the first switching diode, second switch two pole
Pipe and the 3rd switching diode；
First end of described first switched inductors is connected with described positive voltage of transformation outfan, described first switched inductors
The second end be connected with the anode of described first switching diode；
The negative electrode of described first switching diode is connected with described negative voltage of transformation outfan；
The anode of described second switch diode is connected with described positive voltage of transformation outfan, described second switch two pole
The negative electrode of pipe is connected with the first end of described second switch inductance；
Second end of described second switch inductance is connected with described negative voltage of transformation outfan；
The anode of described 3rd switching diode is connected with the anode of described first switching diode, described 3rd switch two
The negative electrode of pole pipe is connected with the negative electrode of described second switch diode.
During enforcement, described inductance unit includes inductor module described at least two-stage parallel with one another；
Described inductance unit also includes being arranged at the connection diode described in every adjacent two-stage between inductor module；
The anode of described connection diode is connected with described negative voltage of transformation outfan, the negative electrode of described connection diode
It is connected with described positive voltage of transformation outfan.
During enforcement, DC converter described in the utility model also includes filter circuit；
The first input end of described filter circuit is connected with described positive voltage of transformation outfan, the of described filter circuit
Two inputs are connected with described negative voltage of transformation outfan；
Described filter circuit, between described positive voltage of transformation outfan and described negative voltage of transformation outfan
Voltage of transformation be filtered.
During enforcement, described filter circuit includes filter inductance, the first filter capacitor and filter resistance；
First end of described filter inductance is connected with described positive voltage of transformation outfan, the second end of described filter inductance
It is connected with the first end of described filter resistance；
Second end of described filter resistance is connected with described negative voltage of transformation outfan；
First end of described first filter capacitor is connected with the second end of described filter inductance, described first filter capacitor
Second end is connected with described negative voltage of transformation outfan.
During enforcement, described filter circuit also includes the second filter capacitor and the 3rd filter capacitor；
First end of described second filter capacitor is connected with the first end of described inductance unit, described second filter capacitor
Second end is connected with described positive voltage of transformation outfan；
Described first end of the 3rd filter capacitor is connected with the second end of described inductance unit, described 3rd filter capacitor
Second end is connected with described negative voltage of transformation outfan.
During enforcement, described partial pressure unit includes the first derided capacitors and the second derided capacitors；
First end of described first derided capacitors is connected with described positive direct-current voltages input, described first derided capacitors
Second end is connected with described branch pressure voltage outfan；
First end of described second derided capacitors is connected with described branch pressure voltage outfan, the of described second derided capacitors
Two ends are connected with described negative dc voltage input.
Compared with prior art, switched inductors cascade structure is applied to three electricity by DC converter described in the utility model
In flat DC-DC (DC-to-dc) changer, reducing circuit while improving voltage gain should to switching device two ends
The requirement of power ability to bear, and will not generation efficiency reduces or circuit volume and cost increase problem.
Accompanying drawing explanation
Fig. 1 is the structure chart of the DC converter described in this utility model embodiment；
Fig. 2 is the schematic diagram that the DC converter described in this utility model embodiment accesses S1 and S2；
Fig. 3 is the oscillogram of S1 and S2；
Fig. 4 is the structure chart of the DC converter described in another embodiment of this utility model；
Fig. 5 A is the structure chart of an embodiment of the inductance unit that DC converter described in the utility model includes；
Fig. 5 B is the embodiment of this utility model inductance unit as shown in Figure 5A current direction schematic diagram when charging；
Fig. 5 C is the embodiment of this utility model inductance unit as shown in Figure 5A current direction schematic diagram when electric discharge；
Fig. 6 A is the structure chart of another embodiment of the inductance unit that DC converter described in the utility model includes；
Fig. 6 B is the embodiment of this utility model inductance unit as shown in Figure 6A current direction schematic diagram when charging；
Fig. 6 C is the embodiment of this utility model inductance unit as shown in Figure 6A current direction schematic diagram when electric discharge；
Fig. 7 A is the structure chart of the DC converter described in the another embodiment of this utility model；
Fig. 7 B is the structure chart of the DC converter described in this utility model another embodiment；
Fig. 8 is the circuit diagram of a specific embodiment of DC converter described in the utility model.
Detailed description of the invention
Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of this utility model rather than whole
Embodiment.Based on the embodiment in this utility model, those of ordinary skill in the art are not under making creative work premise
The every other embodiment obtained, broadly falls into the scope of this utility model protection.
As it is shown in figure 1, the DC converter described in this utility model embodiment, including partial pressure unit 11 and translation circuit
12, described partial pressure unit 11 carries out dividing potential drop for the DC voltage Ui providing direct voltage source 10, and described partial pressure unit includes
Three ends, are respectively as follows: positive direct-current voltages input In+, negative dc voltage input In-and branch pressure voltage outfan OUT；
Described translation circuit 12 includes that the first switch element 121, second switch unit 122, inductance unit 123, first are single
To conductive unit 124 and the second unilateal conduction unit 125, wherein, it is defeated that the first switch element 121 is connected to described positive direct-current voltages
Enter to hold between In+ and positive voltage of transformation outfan OUTPUT+；It is defeated that second switch unit 122 is connected to described negative dc voltage
Enter to hold between In-and negative voltage of transformation outfan OUTPUT-；
Described first unilateal conduction unit 124 is connected to described branch pressure voltage outfan OUT and described positive voltage of transformation
Between outfan OUTPUT+；Described second unilateal conduction unit 125 is connected to described negative voltage of transformation outfan OUTPUT-
And between described branch pressure voltage outfan OUT；
Described inductance unit 123 is connected to described positive voltage of transformation outfan OUTPUT+ and described negative voltage of transformation
Between outfan OUTPUT-；
Described inductance unit includes control module and at least two switched inductors, and (concrete structure of inductance unit is in FIG
Not shown, the concrete structure of inductance unit will be introduced in specific embodiment later the most with reference to the accompanying drawings)；
Described control module for controlling institute when described first switch element 121 and second switch unit 122 all turn on
State at least two switched inductors and be parallel to described positive voltage of transformation outfan OUTPUT+ and described negative voltage of transformation outfan
Between OUTPUT-, when when described first switch element 121 turns on, described second switch unit 122 turns off or when described second
Switch element 122 turns on and controls described at least two switched inductors time described first switch element 121 turns off and is series at described
Between positive voltage of transformation outfan OUTPUT+ and described negative voltage of transformation outfan OUTPUT-.
DC converter described in this utility model embodiment operationally, when the first switch element 121 and second switch
When unit 122 simultaneously turns on, at least two switched inductors that can include inductance unit is charged operation, and now this is at least
Two switched inductors are parallel with one another, and the charging voltage at switched inductors two ends is exactly the DC voltage Ui that direct voltage source 10 provides；
When the first switch element 121 turns on, second switch unit 122 turns off or when second switch unit 122 turns on and the first switch
When unit 121 turns off, at least two switched inductors that can include inductance unit carries out discharge operation, now this at least two
Individual switched inductors is serially connected, and the discharge voltage at each switched inductors two ends is ratio Ui/N (its of DC voltage Ui Yu N
In, N is the number of the switched inductors that inductance unit includes), i.e. discharge current is the 1/N of Ui, and corresponding discharge current is also existing
There is the 1/N of discharge current in technology.Owing to the velocity of discharge is slower than the velocity of discharge of existing DC converter, therefore direct current conversion
The gain of the existing DC converter of the ratio of gains big, and the grid source electricity of the switching transistor that switch element includes when electric discharge
Pressure ratio prior art is medium and small, and therefore switching transistor subjected to stress is the least.
When practical operation, described inductance unit can be switched inductors cascade structure, described in this utility model embodiment
DC converter switched inductors cascade structure is applied in three-level DC-DC (DC-to-dc) changer, improving electricity
The circuit requirement to switching device two ends stress ability to bear is reduced while pressure gain.
Compared to the method using switched inductors and switching capacity to carry out booster tension conversion ratio, this utility model embodiment institute
The voltage conversion ratio of the DC converter stated the most strictly is limited by circuit topological structure, realizes compared to using transformator
The method of high voltage gain, the volume of the DC converter described in this utility model embodiment is less, and required cost is lower.
Concrete, as in figure 2 it is shown, the control of described first switch element 121 terminates into the first switch controlling signal S1, institute
The control stating second switch unit 122 terminates into second switch control signal S2；
As it is shown on figure 3, described first dutycycle of switch controlling signal S1 and accounting for of described second switch control signal S2
Empty ratio is equal, and the frequency of described first switch controlling signal S1 and the frequency of described second switch control signal S2 are equal, described
The phase place of the first switch controlling signal S1 and the phase 180 degree of described second switch control signal S2, described first switch
The dutycycle of control signal S1 is more than 0.5.
Concrete, the first switch element and second switch unit can use switching transistor.Assume that the first switch is single
Switching transistor that unit uses and the switching transistor that second switch unit uses are n-type transistor, then be high level as S1
During signal, the first switching means conductive, when S2 is high level, second switch unit turns on.As it is shown on figure 3, only exist S1 and/
Or S2 is the state of high level signal, and there is not the state that S1 and S2 is low level signal.And when practical operation, it is possible to
To be designed as the first switching means conductive when S1 is for low level signal and second switch unit is led when S2 is for low level signal
Logical, only need to adjust the type of corresponding switching transistor, not repeat them here.
In order to ensure that the DC converter described in this utility model embodiment normally works, the first switch element 121 and
The conduction phase of two switch elements 122 differs 180 degree, and the dutycycle of S1 with S2 is identical with frequency, and the dutycycle of S1
The boost function of DC converting could be realized when being more than 0.5 with the dutycycle of S2.
Concrete, the DC converter described in this utility model embodiment operationally, described first unilateal conduction unit
124 are passed through by the electric current of described branch pressure voltage outfan OUT to described positive voltage of transformation outfan OUTPUT+ for control,
Described second is unidirectionally controlled unit 125 for controlling by described negative voltage of transformation outfan OUTPUT-to described branch pressure voltage
The electric current of outfan OUT passes through.
According to a kind of specific embodiment mode, as shown in Figure 4, described first unilateal conduction unit includes the first clamper two pole
Pipe DC1；Described second unilateal conduction unit includes the second clamp diode DC2；
The anode of described first clamp diode DC1 is connected with described branch pressure voltage outfan OUT, described first clamper two
The negative electrode of pole pipe DC1 is connected with described positive voltage of transformation outfan OUTPUT+；
The anode of described second clamp diode DC2 is connected with described negative voltage of transformation outfan OUTUPT-, and described
The negative electrode of two clamp diode DC2 is connected with described branch pressure voltage outfan OUT.
According to a kind of detailed description of the invention, as shown in Figure 5A, described inductance unit can include inductor module；
Described inductor module include the first switched inductors LS1, second switch inductance LS2, the first switching diode DS1,
Two switching diode DS2 and the 3rd switching diode DS3；Wherein, DS1, DS2 and DS3 are contained in described control module；
First end of described first switched inductors LS1 is connected with described positive voltage of transformation outfan OUTPUT+, and described
Second end of one switched inductors LS1 is connected with the anode of described first switching diode DS1；
The negative electrode of described first switching diode DS1 is connected with described negative voltage of transformation outfan OUTPUT-；
The anode of described second switch diode DS2 is connected with described positive voltage of transformation outfan OUTUPT+, and described
The negative electrode of two switching diode DS2 is connected with first end of described second switch inductance LS2；
Second end of described second switch inductance LS2 is connected with described negative voltage of transformation outfan OUTPUT-；
The anode of described 3rd switching diode DS3 is connected with the anode of described first switching diode DS1, and the described 3rd
The negative electrode of switching diode DS3 is connected with the negative electrode of described second switch diode DS2.
When the first switch element and second switch unit, (the first switch element and second switch unit do not show in figure 5b
Going out) when simultaneously turning on, as shown in Figure 5 B, first via electric current flows through LS1 and DS1 being serially connected, and the second road electric current flows through mutually
DS2 and LS2 of series connection, now LS1 and LS2 is parallel with one another；
When the first switching means conductive, second switch unit turns off or the second switch list when the conducting of second switch unit
When unit turns off during (the first switch element and second switch unit are the most not shown) conducting, as shown in Figure 5 C, electric current is successively
Flowing through LS1, DS3 and LS2, LS1 and LS2 is serially connected.
Preferably, described inductance unit includes inductor module described at least two-stage parallel with one another；Like this, inductance list
The number of the switched inductors that unit includes will increase, and has slowed down further to inductive discharge speed, further booster tension gain；
Described inductance unit also includes being arranged at the connection diode described in every adjacent two-stage between inductor module；
The anode of described connection diode is connected with described negative voltage of transformation outfan, the negative electrode of described connection diode
It is connected with described positive voltage of transformation outfan.
As shown in Figure 6A, described inductance unit includes the first inductor module and the second inductor module；、
First inductor module include the first switched inductors LS1, second switch inductance LS2, the first switching diode DS1,
Two switching diode DS2 and the 3rd switching diode DS3；
Second inductor module include the 3rd switched inductors LS3, the 4th switched inductors LS4, the 4th switching diode DS4,
Five switching diode DS5 and the 6th switching diode DS6；
Connection diode DN it is provided with between the first inductor module and the second inductor module；
Wherein, DS1, DS2, DS3, DS4, DS5, DS6 and DN are contained in control module；
The anode of described connection diode DN is connected with negative voltage of transformation outfan, the negative electrode of described connection diode DN
It is connected with positive voltage of transformation outfan.
When the first switch element and second switch unit, (the first switch element and second switch unit do not show in fig. 6b
Going out) when all turning on, as shown in Figure 6B, first via electric current flows through LS1 and DS1 being serially connected, and the second road electric current flows through mutually string
DS2 and LS2 of connection, the 3rd road electric current flows through LS3 and DS4 being serially connected, the 4th road electric current flow through the LS4 that is serially connected and
DS5, now LS1, LS2, LS3 and LS4 are parallel with one another, direct voltage source the DC voltage provided is to LS1, LS2, LS3 and LS4
Charging；
When the first switching means conductive, second switch unit turns off or when the conducting of second switch unit, first switchs
When unit turns off during (the first switch element and second switch unit are the most not shown) conducting, as shown in Figure 6 C, electric current depends on
Secondary LS1, DS3, LS2 of flowing through, DN, LS3, DS6 and LS4, LS1, LS2, LS3 and LS4 be serially connected, each switched inductors two ends
Voltage all can be reduced to tradition DC-DC converter switched inductors both end voltage 1/4, thus reduce the velocity of discharge, strengthen
Voltage conversion gain.In like manner, when inductance unit includes N level inductor module, N is the integer more than 2, flows through each opening during electric discharge
Close the 1/2N of the switched inductors both end voltage that current reduction is tradition DC-DC converter of inductance.
In the specific implementation, as shown in Figure 7 A, the DC converter described in this utility model embodiment also includes filtered electrical
Road 13；
The first input end of described filter circuit 13 is connected with described positive voltage of transformation outfan OUTPUT+, described filter
Second input of wave circuit 13 is connected with described negative voltage of transformation outfan OUTPUT-；
Described filter circuit, for defeated to described positive voltage of transformation outfan OUTPUT+ and described negative voltage of transformation
Go out to hold the voltage of transformation between OUTPUT-to be filtered, to obtain more satisfactory output DC voltage.
Concrete, as shown in Figure 7 B, described filter circuit can include filter inductance LF, the first filter capacitor CF1 and filter
Ripple resistance RF；
First end of described filter inductance LF is connected with described positive voltage of transformation outfan OUTPUT+, described filtered electrical
Second end of sense LF is connected with first end of described filter resistance RF；
Second end of described filter resistance RF is connected with described negative voltage of transformation outfan OUTPUT-；
First end of described first filter capacitor CF1 is connected with second end of described filter inductance LF, described first filtering
Second end of electric capacity CF1 is connected with described negative voltage of transformation outfan OUTPUT-.
Concrete, described filter circuit also includes the second filter capacitor and the 3rd filter capacitor；
First end of the first end of described second filter capacitor and described inductance unit (namely described inductance unit is with described
One end that first switch element connects) connect, the second end of described second filter capacitor and described positive voltage of transformation outfan
Connect；
Second end of the first end of described 3rd filter capacitor and described inductance unit (namely described inductance unit is with described
One end that second switch unit connects) connect, the second end of described 3rd filter capacitor and described negative voltage of transformation outfan
Connect.
Concrete, described partial pressure unit can include the first derided capacitors and the second derided capacitors；
First end of described first derided capacitors is connected with described positive direct-current voltages input, described first derided capacitors
Second end is connected with described branch pressure voltage outfan；
First end of described second derided capacitors is connected with described branch pressure voltage outfan, described second derided capacitors
Second end is connected with described negative dc voltage input.
Preferably, the capacitance of C1 and the capacitance of C2 are equal, so that partial pressure unit carries out the electricity of OUT after dividing potential drop to Ui
Pressure is the 1/2 of Ui.
Below by a specific embodiment, DC converter described in the utility model is described.
As shown in Figure 8, a specific embodiment of DC converter described in the utility model, including partial pressure unit, conversion
Circuit and filter circuit；
Described partial pressure unit includes positive direct-current voltages input In+, negative dc voltage input In-and branch pressure voltage output
End OUT；
Described translation circuit includes the first switch element, second switch unit, inductance unit the 123, first unilateal conduction list
Unit and the second unilateal conduction unit；
The structure of described inductance unit 123 is as shown in Figure 6A；
Described partial pressure unit carries out dividing potential drop for the DC voltage Ui providing direct voltage source 10；
Described partial pressure unit includes the first derided capacitors C1 and the second derided capacitors C2；
First end of described first derided capacitors C1 is connected with described positive direct-current voltages input In+, described first dividing potential drop
Second end of electric capacity C1 is connected with described branch pressure voltage outfan OUT；
First end of described second derided capacitors C2 is connected with described branch pressure voltage outfan OUT, described second dividing potential drop electricity
The second end holding C2 is connected with described negative dc voltage input In-；
Described first switch element includes the first switching transistor M1, and the grid of described first switching transistor M1 accesses the
One switch controlling signal S1, the first pole of described first switching transistor M1 is connected with In+, described first switching transistor M1
Second pole is connected with first end (i.e. first end of the LS1 in Fig. 6 A) of inductance unit 123；
Described second switch unit includes that the grid of second switch transistor M2, described second switch transistor M2 accesses the
Two switch controlling signal S2, first pole of described second switch transistor M2 is connected with In-, described first switching transistor M1
Second pole is connected with second end (i.e. second end of the LS2 in Fig. 6 A) of inductance unit 123；
The waveform of S1 and the waveform of S2 are as shown in Figure 3；
Described filter circuit includes filter inductance LF, the first filter capacitor CF1, filter resistance RF, the second filter capacitor CF2
With the 3rd filter capacitor CF3；
First end of CF2 is connected with second pole of M1；First end of CF3 is connected with second pole of M2；
Described first unilateal conduction unit includes the first clamp diode DC1；Described second unilateal conduction unit includes
Two clamp diode DC2；
The anode of DC1 is connected with OUT, and the negative electrode of DC1 is connected with second end of CF2；
The anode of DC2 is connected with second end of CF3, and the negative electrode of DC2 is connected with OUT；
First end of LF is connected with the negative electrode of DC1, and second end of LF is connected with first end of RF；
First end of CF3 is connected with first end of RF, and second end of CF3 is connected with second end of RF；
Second end of RF is also connected with the anode of DC2, and the voltage at RF two ends is output DC voltage Uo.
The specific embodiment of this utility model DC converter as shown in Figure 8 operationally,
When M1 and M2 turns on, by Ui, LS1, LS2, LS3 and LS4 parallel with one another are charged；
When M1 conducting, M2 turns off, by flowing through M1 successively, LS1, LS2, LS3 and LS4 of being serially connected, CF2, DC2
With the discharge current of C1, switched inductors is discharged；
When M2 conducting, M1 turns off, by flowing through C2, DC1, CF2 and LS1, LS2, LS3, the LS4 being serially connected successively
And M2, switched inductors is discharged；
When electric discharge, each switched inductors both end voltage is Ui/4, and corresponding discharge current is also to discharge in prior art
The 1/4 of electric current, owing to the velocity of discharge is slower than the velocity of discharge of existing DC converter, therefore the ratio of gains of direct current conversion is existing
The gain of DC converter big, and the gate source voltage of M1 and the gate source voltage of M2 are more medium and small than prior art when electric discharge, because of
This M1 and M2 subjected to stress is the least.
DC converter described in this utility model embodiment have employed a kind of novel circuit topological structure, by different
The model of action that under circuit operation mode, switched inductors construction unit is different can realize higher voltage conversion ratio, and have concurrently can
Reduce the function of high gain circuit switching device both end voltage stress, there is preferable Practical Performance.
The above is preferred implementation of the present utility model, it is noted that for the ordinary skill of the art
For personnel, on the premise of without departing from principle described in the utility model, it is also possible to make some improvements and modifications, these improve
Also protection domain of the present utility model is should be regarded as with retouching.
Claims (10)
1. a DC converter, including partial pressure unit and translation circuit, described partial pressure unit is for providing direct voltage source
DC voltage carry out dividing potential drop, described partial pressure unit include positive direct-current voltages input, negative dc voltage input and dividing potential drop electricity
Pressure outfan；It is characterized in that, described translation circuit includes the first switch element, second switch unit, inductance unit, the first list
To conductive unit and the second unilateal conduction unit, wherein, the first switch element is connected to described positive direct-current voltages input and just
Between phase inversion voltage output end；Second switch unit is connected to described negative dc voltage input and the output of negative voltage of transformation
Between end；
Described first unilateal conduction unit is connected between described branch pressure voltage outfan and described positive voltage of transformation outfan；
Described second unilateal conduction unit is connected between described negative voltage of transformation outfan and described branch pressure voltage outfan；
Described inductance unit is connected between described positive voltage of transformation outfan and described negative voltage of transformation outfan；Described
Inductance unit includes control module and at least two switched inductors；
Described control module is used for controlling described at least two when all turning on when described first switch element and second switch unit
Switched inductors is parallel between described positive voltage of transformation outfan and described negative voltage of transformation outfan, when described first opens
Close unit conducting and described second switch unit turn off time or when described second switch unit conducting and first switch element turn off
Time control described at least two switched inductors be series at described positive voltage of transformation outfan and described negative voltage of transformation output
Between end.
2. DC converter as claimed in claim 1, it is characterised in that the control of described first switch element terminates into first
Switch controlling signal, the control of described second switch unit terminates into second switch control signal, described first on-off control letter
Number dutycycle and the dutycycle of described second switch control signal equal, the frequency of described first switch controlling signal and described
The frequency of second switch control signal is equal, the phase place of described first switch controlling signal and described second switch control signal
Phase 180 degree, the dutycycle of described first switch controlling signal is more than 0.5.
3. DC converter as claimed in claim 2, it is characterised in that described first unilateal conduction unit is for controlling by institute
The electric current stating branch pressure voltage outfan extremely described positive voltage of transformation outfan passes through, and described second unilateal conduction unit is used for controlling
Make and passed through by the electric current of described negative voltage of transformation outfan to described branch pressure voltage outfan.
4. DC converter as claimed in claim 3, it is characterised in that described first unilateal conduction unit includes the first pincers
Position diode；Described second unilateal conduction unit includes the second clamp diode；
The anode of described first clamp diode is connected with described branch pressure voltage outfan, the negative electrode of described first clamp diode
It is connected with described positive voltage of transformation outfan；
The anode of described second clamp diode is connected with described negative voltage of transformation outfan, described second clamp diode
Negative electrode is connected with described branch pressure voltage outfan.
5. the DC converter as described in any claim in Claims 1-4, it is characterised in that described inductance unit bag
Include inductor module；
Described inductor module include the first switched inductors, second switch inductance, the first switching diode, second switch diode and
3rd switching diode；
First end of described first switched inductors is connected with described positive voltage of transformation outfan, the of described first switched inductors
Two ends are connected with the anode of described first switching diode；
The negative electrode of described first switching diode is connected with described negative voltage of transformation outfan；
The anode of described second switch diode is connected with described positive voltage of transformation outfan, described second switch diode
Negative electrode is connected with the first end of described second switch inductance；
Second end of described second switch inductance is connected with described negative voltage of transformation outfan；
The anode of described 3rd switching diode is connected with the anode of described first switching diode, described 3rd switching diode
Negative electrode be connected with the negative electrode of described second switch diode.
6. DC converter as claimed in claim 5, it is characterised in that described inductance unit includes parallel with one another at least two
The described inductor module of level；
Described inductance unit also includes being arranged at the connection diode described in every adjacent two-stage between inductor module；
The anode of described connection diode is connected with described negative voltage of transformation outfan, the negative electrode of described connection diode and institute
State positive voltage of transformation outfan to connect.
7. the DC converter as described in any claim in Claims 1-4, it is characterised in that also include filter circuit；
The first input end of described filter circuit is connected with described positive voltage of transformation outfan, and the second of described filter circuit is defeated
Enter end to be connected with described negative voltage of transformation outfan；
Described filter circuit, for the change between described positive voltage of transformation outfan and described negative voltage of transformation outfan
Change voltage to be filtered.
8. DC converter as claimed in claim 7, it is characterised in that described filter circuit includes filter inductance, the first filter
Ripple electric capacity and filter resistance；
First end of described filter inductance is connected with described positive voltage of transformation outfan, the second end of described filter inductance and institute
The first end stating filter resistance connects；
Second end of described filter resistance is connected with described negative voltage of transformation outfan；
First end of described first filter capacitor is connected with the second end of described filter inductance, the second of described first filter capacitor
End is connected with described negative voltage of transformation outfan.
9. DC converter as claimed in claim 8, it is characterised in that described filter circuit also include the second filter capacitor and
3rd filter capacitor；
First end of described second filter capacitor is connected with the first end of described inductance unit, the second of described second filter capacitor
End is connected with described positive voltage of transformation outfan；
Described first end of the 3rd filter capacitor is connected with the second end of described inductance unit, the second of described 3rd filter capacitor
End is connected with described negative voltage of transformation outfan.
10. DC converter as claimed in claim 9, it is characterised in that described partial pressure unit include the first derided capacitors and
Second derided capacitors；
First end of described first derided capacitors is connected with described positive direct-current voltages input, the second of described first derided capacitors
End is connected with described branch pressure voltage outfan；
First end of described second derided capacitors is connected with described branch pressure voltage outfan, the second end of described second derided capacitors
It is connected with described negative dc voltage input.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620131411.9U CN205666755U (en) | 2016-02-19 | 2016-02-19 | DC convertor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620131411.9U CN205666755U (en) | 2016-02-19 | 2016-02-19 | DC convertor |
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| CN205666755U true CN205666755U (en) | 2016-10-26 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105763056A (en) * | 2016-02-19 | 2016-07-13 | 京东方科技集团股份有限公司 | Direct-current converter |
| CN109412407A (en) * | 2018-11-13 | 2019-03-01 | 天津大学 | The high voltage boosting dc converter of belt switch capacitor |
-
2016
- 2016-02-19 CN CN201620131411.9U patent/CN205666755U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105763056A (en) * | 2016-02-19 | 2016-07-13 | 京东方科技集团股份有限公司 | Direct-current converter |
| WO2017140119A1 (en) * | 2016-02-19 | 2017-08-24 | Boe Technology Group Co., Ltd. | Direct current converter |
| US10186968B2 (en) | 2016-02-19 | 2019-01-22 | Boe Technology Group Co., Ltd. | Direct current converter |
| CN109412407A (en) * | 2018-11-13 | 2019-03-01 | 天津大学 | The high voltage boosting dc converter of belt switch capacitor |
| CN109412407B (en) * | 2018-11-13 | 2020-08-11 | 天津大学 | High-boost DC converter with switch capacitor |
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