CN103997221B - A kind of multiple-channel output direct current DC converter and corresponding radio frequency units - Google Patents
A kind of multiple-channel output direct current DC converter and corresponding radio frequency units Download PDFInfo
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- CN103997221B CN103997221B CN201410162398.9A CN201410162398A CN103997221B CN 103997221 B CN103997221 B CN 103997221B CN 201410162398 A CN201410162398 A CN 201410162398A CN 103997221 B CN103997221 B CN 103997221B
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Abstract
The embodiment of the present invention provides a kind of multiple-channel output direct current DC converter, including：Primary side translation circuit, transformer and at least two secondary translation circuits；Wherein, the primary side translation circuit is coupled with least two secondary translation circuit by transformer, and at least two secondary translation circuit is coupled by transformer between each other；The primary side translation circuit comprises at least first switch pipe and second switch pipe；By adjusting the dutycycle of the first switch pipe and the second switch pipe, the output voltage of two secondary translation circuits is can adjust, correspondingly, the embodiment of the present invention additionally provides a kind of corresponding radio frequency units.Implement the embodiment of the present invention, the performance of converter can be improved, and its cost and volume can be reduced, and improve reliability and the life-span of radio frequency units.
Description
Technical field
The present invention relates to the power technique fields of wireless base station, more particularly to a kind of multi-channel output DC-DC inverter
And the radio frequency units using respective converter.
Background technology
The radio frequency units of wireless base station（Radio Remote Unit, RRU）Application environment substantially in outdoor,
Working environment is more severe, and range of temperature may non-constant width（For example, -40 DEG C to 55 DEG C of scope can be reached）.And
Inside RRU, temperature is sometimes or even up to 100 DEG C.Therefore the power supply inside RRU in high temperature environments can exist such as use
The problems such as life and reliability.Thus, needed inside RRU using the power technology side that circuit structure is simple, high-temperature behavior is good
Case.
As shown in figure 1, it is a kind of block diagram of existing DC converter applied to wireless base station.In this skill
In art scheme, the 48V of input direct current is transformed into 30V and 5.5V direct current respectively by two isolated converters, point
Gong Gei not power amplifier and digital circuit.But kind scheme is required for as a result of two isolated converters in B and C-terminal mouth
There is Large Copacity filter capacitor.Especially connecting filter capacitor used at the port B of power amplifier needs higher voltage
（More than 50V）With bigger capacity（Thousands of microfarads）, generally require from alminium electrolytic condenser；And alminium electrolytic condenser volume is big simultaneously
And service life is limited at high temperature；Further, since energy can not flow between port B and C, each port will be by maximum
Load, dynamic and the requirement of retention time design, therefore cause the circuit cost high, and volume is big.
As shown in Fig. 2 be it is existing another be applied to wireless base station DC converter block diagram.At this
In kind technical scheme, which employs a non-isolated decompression（BUCK）An isolated converter in converter replacement technique 1,
Therefore the holistic cost of circuit and volume has been reduced relatively, but it still needs two independent converters.Simultaneously as
Port B to port C energy one-way flow is realized, can be reduced port C filter capacitor, and makes port C's
Dynamic property is improved, because port C energy obtains from port B, and port B is the burning voltage by voltage stabilizing.But by
Port B can not be flowed to from port C in energy, therefore port B still needs Large Copacity alminium electrolytic condenser, and port B dynamic property
Also can not improve, because port B energy obtains from port A, and the voltage obtained at the A of port is without the unstable of voltage stabilizing
Voltage.
The content of the invention
Technical problem to be solved of the embodiment of the present invention is, there is provided a kind of multi-channel output DC-DC inverter with
And corresponding radio frequency units, the two-way flow of energy can be realized between multiple-channel output, and reduce or remove Large Copacity
The use of electrochemical capacitor, converter is can apply in the environment of high temperature, improve service life and reliability.
In order to solve the above-mentioned technical problem, the embodiment of the present invention provides a kind of multi-channel output DC-DC inverter, is used for
Powered for radio frequency units, including：
Primary side translation circuit, is connected with direct-current input power supplying；
At least two secondary translation circuits, wherein the first secondary translation circuit is used to carry out rectifying conversion, and by after conversion
The first dc source obtained is exported to connected power amplifier, and the second secondary translation circuit is used to carry out rectifying conversion,
And the second dc source obtained after conversion is exported to connected digital circuit；
Transformer, has a primary side winding and at least two vice-side windings, and the primary side winding becomes with the primary side
Change circuit to be connected, the first secondary translation circuit and the second secondary translation circuit connect a vice-side winding respectively；
Wherein, the primary side translation circuit is coupled with least two secondary translation circuit by transformer, and
At least two secondary translation circuit is coupled by transformer between each other, makes energy in two secondary translation circuit phases
Transmitted between mutually；
The primary side translation circuit, which comprises at least, first switch pipe and second switch pipe, by adjusting the first switch
The dutycycle of pipe and the second switch pipe, it can adjust the voltage of first dc source and the second dc source；
Wherein, the primary side translation circuit include by filter capacitor, first switch pipe, second switch pipe, the first inductance and
The voltage-dropping type voltage stabilizing translation circuit of first electric capacity composition, and by the 3rd switching tube, the 4th switching tube and the transformer primary
The DC/AC translation circuits of side winding composition；
Wherein, the filter capacitor and direct-current input power supplying and connecing, its positive pole connects the drain electrode of first switch pipe, and described the
The source electrode of one switching tube is connected with the drain electrode of one end, second switch pipe of the first inductance, the other end of first inductance and
Positive pole, the centre tap of transformer primary side winding of one electric capacity are connected, the source electrode of the second switch pipe, the first electric capacity it is negative
Pole, the source electrode of the 3rd switching tube, the source electrode of the 4th switching tube are connected with the negative pole of the filter capacitor, the 3rd switching tube
Drain electrode, the drain electrode of the 4th switching tube connect one end of the transformer primary side winding respectively；
Wherein, further comprise there is separation feedback control circuit, its one end connects the positive pole of the 4th electric capacity, for
The grid of the first switch pipe conveys corresponding pulse-width signal, and the separation feedback control circuit further comprises：
Sampled voltage compares amplifying circuit, for the voltage that will be sampled from the positive pole of second electric capacity carry out after partial pressure with
One reference voltage is compared, and is amplified；
Pulse-width modulation circuit, for the predetermined saw of amplified signal and one that will compare amplifying circuit from the sampled voltage
Tooth ripple signal is compared, and generates pulse-width signal；
Isolation circuit, including at least there is optocoupler, for pulse-width signal caused by the pulse-width modulation circuit to be transmitted
Grid to the first switch pipe；
Wherein, the first secondary translation circuit includes the 5th switching tube, the 6th switching tube and the second electric capacity；
Wherein, the centre tap of the positive pole connection vice-side winding of transformer first of second electric capacity, the described 5th
The source electrode of switching tube, the source electrode of the 6th switching tube connect the negative pole of second electric capacity, the drain electrode of the 5th switching tube, the 6th
The drain electrode of switching tube connects one end of the vice-side winding of transformer first, the second electric capacity both ends connection power amplifier electricity respectively
Road.
Preferably, the switching tube of the second secondary translation circuit bag the 7th, the 8th switching tube and the 3rd electric capacity；
Wherein, the centre tap of the positive pole connection vice-side winding of transformer second of the 3rd electric capacity, the described 7th
The source electrode of switching tube, the source electrode of the 8th switching tube connect the negative pole of the 3rd electric capacity, the drain electrode of the 7th switching tube, the 8th
The drain electrode of switching tube connects one end of the vice-side winding of transformer second, the 3rd electric capacity both ends connection numeral electricity respectively
Road.
Preferably, the first switch pipe has complementary dutycycle, the 3rd switching tube with the second switch pipe
Dutycycle with the 4th switching tube is 50%, the 3rd switching tube and the 5th switching tube, the 7th switching tube
Synchro switch, the 4th switching tube and the 6th switching tube, the 8th switching tube synchro switch.
Preferably, the first secondary translation circuit includes by the 9th switching tube, the tenth switching tube, the 11st switch
The full bridge rectifier of pipe, the 12nd switching tube composition；
Wherein, the source electrode of first end connection the 9th switching tube of the vice-side winding of transformer first, the 11st are opened
The drain electrode of pipe is closed, the second end of the vice-side winding of transformer first connects the source electrode of the tenth switching tube, the 12nd switch
The drain electrode of pipe, the drain electrode of the 9th switching tube, the drain electrode of the tenth switching tube are connected with the positive pole of the 4th electric capacity, and the described 11st
The source electrode of switching tube, the source electrode of the 12nd switching tube are connected with the negative pole of the 4th electric capacity.
Preferably, the 3rd electric capacity is Large Copacity low-voltage capacitance, and second electric capacity and the 4th electric capacity are high pressure
Alminium electrolytic condenser.
Correspondingly, the embodiment of the present invention also provides a kind of radio frequency units, and it uses foregoing multiple-channel output direct current-straight
Current converter, the connection power amplifier of output all the way of the multi-channel output DC-DC conversion, another way output connection numeral electricity
Road.
Implement the embodiment of the present invention, have the advantages that：
In embodiment provided by the invention, only using in an independent isolated converter and adjustment primary side translation circuit
First switch pipe dutycycle, it is possible to achieve the voltage stabilizing and pressure regulation of the output port of the first secondary translation circuit；
Simultaneously, it is possible to achieve the energy in bidirectional flow between the first secondary translation circuit and the second translation circuit, make
The voltage of the voltage of two translation circuit output ports and the first secondary translation circuit output port keeps fixed ratio voltage stabilizing, and
And when adjusting the voltage of output port of the first secondary translation circuit, make the voltage of the output port of the second secondary translation circuit
Change therewith, can further improve the dynamic response performance of the first secondary translation circuit, and extend the second secondary conversion electricity
The voltage hold-time on road；
Moreover, by the energy in bidirectional flow between the first secondary translation circuit and the second translation circuit, can also be real
The big capacity electrolyte capacitor of the first secondary translation circuit is now reduced or removed, only with the ceramic condenser of low capacity, so as to
Cost and volume are reduced, and improves system reliability and life-span.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, according to this
A little accompanying drawings obtain other accompanying drawings and still fall within scope of the invention.
Fig. 1 is a kind of block diagram of existing DC converter applied on wireless base station；
Fig. 2 be it is existing another be applied to wireless base station on DC converter block diagram；
Fig. 3 is the block diagram of one embodiment of multi-channel output DC-DC inverter provided by the invention；
The circuit theory diagrams of the one embodiment for the multi-channel output DC-DC inverter that Fig. 4 is corresponded in Fig. 3；
Fig. 5 is that the first secondary in another embodiment of multi-channel output DC-DC inverter provided by the invention becomes
Change the schematic diagram of circuit；
The circuit theory diagrams of the further embodiment for the multi-channel output DC-DC inverter that Fig. 6 is corresponded in Fig. 3；
Fig. 7 is the circuit theory diagrams of one embodiment of the separation feedback control circuit in Fig. 6.
Embodiment
The explanation of following embodiment is refer to the attached drawing, can be to the specific embodiment implemented to the example present invention.
The direction term that the present invention is previously mentioned, such as " on ", " under ", "front", "rear", "left", "right", " interior ", " outer ", " side " etc.,
Only it is the direction with reference to annexed drawings.Therefore, the direction term used is to illustrate and understand the present invention, and is not used to limit
The present invention.
To make the object, technical solutions and advantages of the present invention clearer, the present invention is made into one below in conjunction with accompanying drawing
It is described in detail on step ground.
As shown in figure 3, it is the square frame signal of one embodiment of multi-channel output DC-DC inverter provided by the invention
Figure, in the lump with reference to the circuit theory diagrams in Fig. 4.In this embodiment, multi-channel output DC-DC inverter, for for nothing
Line radio frequency unit is powered, including：
Primary side translation circuit A, it is connected with direct-current input power supplying Vin, and it can be the unidirectional work(for having voltage stabilizing function
Rate translation circuit；
At least two secondary translation circuits, wherein the first secondary translation circuit B be used for will it is transformed after obtain it is first straight
Flow power supply（Vout1）To connected power amplifier, the second secondary translation circuit C is used for second will obtained after conversion for output
Dc source（Vout2）Export to connected digital circuit；
Transformer T, there is a primary side winding and at least two vice-side windings, primary side winding and primary side translation circuit A
It is connected, the first secondary translation circuit B and the second secondary translation circuit C connect a vice-side winding respectively；
Wherein, primary side translation circuit A and at least two secondary translation circuits（B、C）Coupled by transformer T, and extremely
Few two secondary translation circuits（B、C）Coupled between each other by transformer T, so as to realize energy from primary side translation circuit
A transfers at least two secondary translation circuits（B、C）, and energy is in two secondary translation circuits（B、C）Transmit between each other；
Primary side translation circuit A comprises at least the voltage-dropping type voltage stabilizing translation circuit and DC/AC translation circuits being connected with each other, its
In, voltage-dropping type voltage stabilizing translation circuit, which comprises at least, first switch pipe Q1 and second switch pipe Q2, by adjusting first switch pipe
Q1 and second switch pipe Q2 dutycycle, it can adjust the voltage of the first dc source and the second dc source, i.e. first switch
Pipe Q1 dutycycle can be adjusted between 0-100%, to change output voltage.
Specifically, incorporated by reference to the schematic diagram in Fig. 4, wherein, primary side translation circuit A includes being opened by filter capacitor Ca, first
The voltage-dropping type voltage stabilizing translation circuit of pipe Q1, second switch pipe Q2, the first inductance L1 and the first electric capacity C1 compositions is closed, and by the 3rd
Switching tube Q3, the 4th switching tube Q4 and transformer T primary side windings composition DC/AC translation circuits；
Wherein, filter capacitor Ca and direct-current input power supplying and connect, its positive pole connection first switch pipe Q1 drain electrode, first opens
The source electrode for closing pipe Q1 is connected with the drain electrode of the first inductance L1 one end, second switch pipe Q2, the first inductance L1 other end and the
One electric capacity C1 positive pole, the centre tap of transformer T primary side windings be connected, second switch pipe Q2 source electrode, the first electric capacity C1
Negative pole, the 3rd switching tube Q3 source electrode, the 4th switching tube Q4 source electrode are connected with filter capacitor Ca negative pole, the 3rd switching tube Q3
Drain electrode, the 4th switching tube Q4 drain electrode respectively connect transformer T primary side windings one end.
It is understood that in other examples, primary side translation circuit A can also use such as boosting inverter electricity
Road.
Specifically, the first secondary translation circuit B includes the 5th switching tube Q5, the 6th switching tube Q6 and the second electric capacity C2；
Wherein, the centre tap of the second electric capacity C2 positive pole connection transformer the first vice-side windings of T, the 5th switching tube Q5's
Source electrode, the 6th switching tube Q6 source electrode connect the second electric capacity C2 negative pole, the 5th switching tube Q5 drain electrode, the 6th switching tube Q6
Drain electrode connects one end of transformer the first vice-side windings of T, the second electric capacity C2 both ends connection power amplifier respectively.
Specifically, the second secondary translation circuit C includes the 7th switching tube Q7, the 8th switching tube Q8 and the 3rd electric capacity C3；
Wherein, the centre tap of the 3rd electric capacity C3 positive pole connection transformer the second vice-side windings of T, the 7th switching tube Q7's
Source electrode, the 8th switching tube Q8 source electrode connect the 3rd electric capacity C3 negative pole, the 7th switching tube Q7 drain electrode, the 8th switching tube Q8
Drain electrode connects one end of transformer the second vice-side windings of T, the 3rd electric capacity C3 both ends connection digital circuit respectively.
It is understood that in foregoing circuit schematic diagram, first switch pipe Q1 and second switch pipe Q2 has complementary
Dutycycle, such as when first switch pipe Q1 dutycycle is d, then second switch pipe Q2 dutycycle is 1-d；3rd switching tube
Q3 and the 4th switching tube Q4 dutycycle are 50%, i.e., the 4th switching tube Q4 is closed when three switching tube Q3 are opened, the 4th switching tube
Three switching tube Q3 are closed when Q4 is opened；3rd switching tube Q3 and the 5th switching tube Q5, the 7th switching tube Q7 synchro switches, the 4th opens
Close pipe Q4 and the 6th switching tube Q6, the 8th switching tube Q8 synchro switches.
Wherein, the 3rd electric capacity C3 is Large Copacity low-voltage capacitance, and the second electric capacity C2 and the 4th electric capacity C4 are high-pressure aluminum electrolytic electricity
Hold.
Become it is understood that the first secondary translation circuit B and the second secondary translation circuit C constitute multi-functional power
Circuit is changed, it can at least realize two kinds of functions, wherein：The first function is to realize AC/DC rectification functions, i.e., by transformer T
The AC energy that passes over of primary side respectively by the 5th switching tube Q5 and the 6th switching tube in the first secondary translation circuit B
The 7th switching tube Q7 and the 8th switching tube Q8 rectifications in Q6, and the second secondary translation circuit C turn into direct current, are supplied respectively to work(
Electric discharge road and digital circuit.
Second of function can be achieved on energy between the first secondary translation circuit B and the second secondary translation circuit C
Bi-directional.Wherein, bi-directional includes 3 kinds of patterns：
Pattern 1：As the 5th switching tube Q5 and the 7th switching tube Q7 synchro switches, and the 6th switching tube Q6 and the 8th switching tube
During Q8 synchro switches, the winding that is connected by the winding that the first secondary translation circuit B is connected with the second secondary translation circuit C
Between coupling, energy two-way between the first secondary translation circuit B and the second secondary translation circuit C can pass freely
Pass；
Pattern 2：When closing the 5th switching tube Q5 and the 6th switching tube Q6, energy can only be from the second secondary translation circuit C
Flow to the first secondary translation circuit B；
Pattern 3：When closing the 7th switching tube Q7 and the 8th switching tube Q8, energy can only be from the first secondary translation circuit B
Flow to the second secondary translation circuit C.
In addition, the dutycycle by adjusting first switch pipe Q1 and second switch pipe Q2, can adjust the first dc source with
And second dc source voltage, specifically, first switch pipe Q1 dutycycle can be adjusted between 0-100%, to change
Become output voltage.Its principle is specific as follows：Dutycycle d by changing first switch pipe Q1 can realize a point voltages（I.e. first
Electric capacity C1 positive pole）Regulation, the relation of a point voltages and input voltage vin is：Va=Vin*d；Further, since the first secondary becomes
The energy capable of bidirectional flowing changed between circuit B and the second secondary translation circuit C, the second secondary translation circuit C output voltage with
The voltage of first secondary translation circuit B outputs keeps fixed ratio voltage stabilizing, and is adjusting the first secondary translation circuit B outputs
Voltage when, the second secondary translation circuit C output voltage also can be with change；The voltage ratio of tri- points of a, b, c in Fig. 4
Example relation is determined by the turn ratio of the winding of transformer T primary and secondary side, it is assumed that connection primary side translation circuit A, the first secondary become
The umber of turn for changing circuit B and the transformer of second tri- parts of translation circuit C is respectively Na, Nb and Nc, then a, b, c
Relation between the voltage ratio and three groups of umber of turns of three points is： Va：Vb：Vc=Na：Nb：Nc.
As shown in figure 5, be multi-channel output DC-DC inverter provided by the invention further embodiment in first
The schematic diagram of secondary translation circuit；First secondary translation circuit B includes by the 9th switching tube Q9, the tenth switching tube Q10,
The whole circuit of full-bridge of 11 switching tube Q11, the 12nd switching tube Q12 composition；
Wherein, the first end of the vice-side windings of transformer T first connects the 9th switching tube Q9 source electrode, the 11st switching tube
Q11 drain electrode, the second end of the vice-side windings of transformer T first connect the tenth switching tube Q10 source electrode, the 12nd switching tube Q12
Drain electrode, the 9th switching tube Q9 drain electrode, the tenth switching tube Q10 drain electrode be connected with the 4th electric capacity C4 positive pole, and the 11st opens
Source electrode, the 12nd switching tube Q12 source electrode for closing pipe Q11 are connected with the 4th electric capacity C4 negative pole.
As shown in fig. 6, the circuit of another embodiment of the multi-channel output DC-DC inverter corresponded in Fig. 3
Schematic diagram；In this embodiment, further comprise there is a separation feedback control circuit, it is arranged on b points and first switch pipe
Between Q1, i.e., its one end connects the second electric capacity C2 positive pole, for conveying corresponding pulsewidth modulation to first switch pipe Q1 grids
Signal；It is understood that for Fig. 5 circuit, one end of the separation feedback control circuit and the 4th electric capacity C4 positive pole phase
Connection, i.e., realize voltage stabilizing function by detecting the voltage of b points；In addition, in other examples, the feedback control circuit
It can set between a points and first switch pipe Q1, i.e., its one end is connected with the first electric capacity C1 positive pole, in this fashion,
It is to realize voltage stabilizing function by detecting the voltage of a points.
As shown in fig. 7, be the circuit theory diagrams of one embodiment of this separation feedback control circuit, in this embodiment,
The separation feedback control circuit further comprises：
Sampled voltage compares amplifying circuit, for by from the sampling of the positive pole of the second electric capacity C2 positive pole or the 4th electric capacity C4
Voltage（The sampled voltage V_b from b points is shown in figure）After progress partial pressure compared with a reference voltage, and put
Greatly, specifically include：Divider resistance R1 and R2,3rd resistor R3, the 5th electric capacity C5 and first comparator OP1；Wherein sample
Voltage V_b carries out partial pressure by partial pressure resistance R1 and R2, and is carried out compared with reference voltage V ref, and by OP1, R3, C5
Amplification；
Pulse-width modulation circuit, for the predetermined sawtooth waveforms of the amplified signal and one that compare amplifying circuit from sampled voltage to be believed
Number it is compared, and generates a pulse-width signal, specifically includes：Sawtooth signal source V_SAW and the second comparator
OP2, wherein, the signal of sampled voltage contrasting amplified circuit amplification is produced compared with V_SAW by the second comparator OP2
Pulsewidth modulation（PWM）Signal；
Isolation circuit, including at least there is optocoupler, for sending pulse-width signal caused by pulse-width modulation circuit to
One switching tube Q1 grid, specifically, the isolation circuit include optocoupler OPT1, the 4th resistance R4 and the 5th resistance.
Correspondingly, the embodiment of the present invention also provides a kind of radio frequency units（Radio Remote Unit, RRU）, its
Using the multi-channel output DC-DC inverter shown in earlier figures 3 and Fig. 7, wherein, multi-channel output DC-DC conversion
Output connection power amplifier all the way, another way output connection digital circuit, more details refer to foregoing retouch Fig. 3-Fig. 7
State, herein without repeating.
Implement the embodiment of the present invention, have the advantages that：
First, implement embodiments of the invention, multiple-output electric power can be realized by simple circuit structure, wherein extremely
Few to connect power amplifier all the way, another way can connect digital circuit；
Furthermore it is possible to pass through the regulation to first switch pipe Q1 dutycycle in primary side translation circuit A, it is possible to achieve to
The voltage of one secondary translation circuit B outputs and the voltage of the second secondary translation circuit C outputs are adjusted and stably；
Energy bidirectional flow can be realized by being additionally, since between the first secondary translation circuit B and the second secondary translation circuit C
It is dynamic, make to keep fixed ratio between the voltage that the second secondary translation circuit C is exported and the voltage that the first secondary translation circuit B is exported
Example voltage stabilizing, so as to when adjusting the voltage of the first secondary translation circuit B outputs, make what the second secondary translation circuit C was exported
The change of voltage follow；
Furthermore due to energy bidirectional flow can be realized between the first secondary translation circuit B and the second secondary translation circuit C
It is dynamic, thus the first secondary translation circuit B and the second secondary translation circuit C Large Copacity filter capacitor can realize it is shared, so as to subtract
Few total capacitance quantity, reduces cost；And can be by the way that the 3rd electric capacity C3 be configured into Large Copacity in the second secondary translation circuit C
Low-voltage capacitance（Such as tantalum electric capacity）, so as to reduce or cancel the high-voltage aluminium electrolysis capacitance of high pressure power amplifier（Second electric capacity C2）'s
Quantity, improve system reliability and life-span；
Due to energy in bidirectional flow can be realized between the first secondary translation circuit B and the second secondary translation circuit C, enter one
Step can improve the first secondary translation circuit B dynamic response performance, and extend the second secondary translation circuit C voltage holding
Time.When the first secondary translation circuit B output ports have dynamic electric voltage to fall, the second secondary translation circuit C output ports
Energy can flow into B ports by the 7th switching tube Q7, the 8th switching tube Q8 and transformer T winding, reduce Voltage Drop；When
When first secondary translation circuit B output ports have dynamic electric voltage overshoot, the energy of the first secondary translation circuit B output ports can be with
Second secondary translation circuit C output end is flowed into by the 5th switching tube Q5, the 6th switching tube Q6 and transformer T winding
Mouthful, reduce voltage overshoot；And when input voltage vin power down, it is often desired to the electricity of the second secondary translation circuit C output ports
Pressure is able to maintain that the more time to extend the time of digital circuit work, now, first switch pipe Q1 and second switch pipe Q2
Disconnect, the 5th switching tube Q5, the 6th switching tube Q6 work on, and make the energy of the first secondary translation circuit B output port
The second secondary translation circuit C output port is flowed to, so as to extend the second secondary translation circuit C voltage hold-time.
The above disclosed power for being only a kind of preferred embodiment of the present invention, the present invention can not being limited with this certainly
Sharp scope, therefore the equivalent variations made according to the claims in the present invention, still belong to the scope that the present invention is covered.
Claims (6)
- A kind of 1. multi-channel output DC-DC inverter, for being powered for radio frequency units, it is characterised in that including：Primary side translation circuit, is connected with direct-current input power supplying；At least two secondary translation circuits, wherein the first secondary translation circuit is used to carry out rectifying conversion, and it will be obtained after conversion The first dc source export to connected power amplifier, the second secondary translation circuit is used to carry out rectifying conversion, and will The second dc source obtained after conversion is exported to connected digital circuit；Transformer, there is a primary side winding and at least two vice-side windings, the primary side winding and primary side conversion electricity Road is connected, and the first secondary translation circuit and the second secondary translation circuit connect a vice-side winding respectively, wherein, first Secondary translation circuit includes the 5th switching tube, the 6th switching tube and the second electric capacity；Wherein, the primary side translation circuit is coupled with least two secondary translation circuit by transformer, and described At least two secondary translation circuits are coupled by transformer between each other, make energy two secondary translation circuits mutually it Between transmit；The primary side translation circuit comprise at least have first switch pipe and second switch pipe, by adjust the first switch pipe with The dutycycle of the second switch pipe, it can adjust the voltage of first dc source and the second dc source；Wherein, the primary side translation circuit is included by filter capacitor, first switch pipe, second switch pipe, the first inductance and first Electric capacity composition voltage-dropping type voltage stabilizing translation circuit, and by the 3rd switching tube, the 4th switching tube and the transformer primary side around The DC/AC translation circuits of group composition；Wherein, the filter capacitor and direct-current input power supplying and connect, its positive pole connects the drain electrode of first switch pipe, and described first opens The source electrode for closing pipe is connected with the drain electrode of one end, second switch pipe of the first inductance, the other end of first inductance and the first electricity Positive pole, the centre tap of transformer primary side winding of appearance are connected, the source electrode of the second switch pipe, the negative pole of the first electric capacity, The source electrode of three switching tubes, the source electrode of the 4th switching tube are connected with the negative pole of the filter capacitor, the drain electrode of the 3rd switching tube, The drain electrode of 4th switching tube connects one end of the transformer primary side winding respectively；Wherein, further comprise there is separation feedback control circuit, its one end connects the positive pole of the 4th electric capacity, for described first The grid of switching tube conveys corresponding pulse-width signal, and the separation feedback control circuit further comprises：Sampled voltage compares amplifying circuit, for the voltage that will be sampled from the positive pole of second electric capacity carry out after partial pressure with one Reference voltage is compared, and is amplified；Pulse-width modulation circuit, for the amplified signal and a predetermined sawtooth waveforms of amplifying circuit will to be compared from the sampled voltage Signal is compared, and generates pulse-width signal；Isolation circuit, including at least there is optocoupler, for sending pulse-width signal caused by the pulse-width modulation circuit to institute State the grid of first switch pipe；Wherein, the positive pole of second electric capacity connects the centre tap of the vice-side winding of transformer first, the 5th switch The source electrode of pipe, the source electrode of the 6th switching tube connect the negative pole of second electric capacity, the drain electrode of the 5th switching tube, the 6th switch The drain electrode of pipe connects one end of the vice-side winding of transformer first respectively, and the second electric capacity both ends connect power amplifier.
- 2. multi-channel output DC-DC inverter as claimed in claim 1, it is characterised in that the second secondary conversion electricity Road includes the 7th switching tube, the 8th switching tube and the 3rd electric capacity；Wherein, the positive pole of the 3rd electric capacity connects the centre tap of the vice-side winding of transformer second, the 7th switch The source electrode of pipe, the source electrode of the 8th switching tube connect the negative pole of the 3rd electric capacity, the drain electrode of the 7th switching tube, the 8th switch The drain electrode of pipe connects one end of the vice-side winding of transformer second respectively, and the 3rd electric capacity both ends connect digital circuit.
- 3. multi-channel output DC-DC inverter as claimed in claim 2, it is characterised in thatThe first switch pipe has complementary dutycycle with the second switch pipe, and the 3rd switching tube is opened with the described 4th The dutycycle for closing pipe is 50%, the 3rd switching tube and the 5th switching tube, the 7th switching tube synchro switch, institute State the 4th switching tube and the 6th switching tube, the 8th switching tube synchro switch.
- 4. multi-channel output DC-DC inverter as claimed in claim 2, it is characterised in that the first secondary conversion electricity Road includes the full bridge rectifier being made up of the 9th switching tube, the tenth switching tube, the 11st switching tube, the 12nd switching tube；Wherein, the first end of the vice-side winding of transformer first connects source electrode, the 11st switching tube of the 9th switching tube Drain electrode, the second end of the vice-side winding of transformer first connects source electrode, the 12nd switching tube of the 11st switching tube Drain electrode, the drain electrode of the 9th switching tube, the drain electrode of the tenth switching tube be connected with the positive pole of the 4th electric capacity, and the described 11st opens Source electrode, the source electrode of the 12nd switching tube for closing pipe are connected with the negative pole of the 4th electric capacity.
- 5. multi-channel output DC-DC inverter as claimed in claim 4, it is characterised in that the 3rd electric capacity is great Rong Low-voltage capacitance is measured, second electric capacity and the 4th electric capacity are high-voltage aluminium electrolysis capacitance.
- 6. a kind of radio frequency units, it includes the multi-channel output DC-DC conversion as described in claim any one of 1-5 Device, the connection power amplifier of output all the way of the multi-channel output DC-DC conversion, another way output connection digital circuit.
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| CN110024275B (en) * | 2017-04-01 | 2022-03-01 | Abb瑞士股份有限公司 | DC-to-DC converter |
| CN110198862A (en) * | 2018-09-18 | 2019-09-03 | 深圳欣锐科技股份有限公司 | Integrated on-board circuit for charging machine and manufacturing method, integrated on-board charger |
| CN110350799B (en) * | 2019-07-05 | 2021-07-30 | 北京无线电测量研究所 | Topological structure circuit of DC-DC power supply converter |
| CN111130351B (en) * | 2019-11-26 | 2021-11-09 | 国网浙江省电力有限公司湖州供电公司 | Low-delay self-adaptive bidirectional DCDC converter and control method thereof |
| CN112436734A (en) * | 2020-11-17 | 2021-03-02 | 天津津航计算技术研究所 | Secondary PWM rectification multi-path output circuit |
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| CN1304205A (en) * | 2000-01-07 | 2001-07-18 | 三垦电气株式会社 | Electric source switch appliance |
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