CN207184330U - A kind of wide scope Sofe Switch DC transfer circuit - Google Patents
A kind of wide scope Sofe Switch DC transfer circuit Download PDFInfo
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- CN207184330U CN207184330U CN201721012741.7U CN201721012741U CN207184330U CN 207184330 U CN207184330 U CN 207184330U CN 201721012741 U CN201721012741 U CN 201721012741U CN 207184330 U CN207184330 U CN 207184330U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The utility model provides a kind of wide scope Sofe Switch DC transfer circuit.The circuit includes first and second series-resonant inverting circuit, first and second high-frequency isolation transformer, rectification circuit and controller；The input of first and second series-resonant inverting circuit is used to be connected with DC source, both ends of two output ends of first and second series-resonant inverting circuit respectively with the primary side of first and second high-frequency isolation transformer are connected, with accessing the rectification circuit after the secondary series connection of first and second high-frequency isolation transformer, the controller inputs control signal to first and second described series-resonant inverting circuit, and two output ends of the rectification circuit are used to connect with load.The utility model is not only adapted to the input voltage range of broadness, also with broader output voltage range.
Description
Technical field
Direct-current switch power supply is the utility model is related to, more particularly to a kind of wide scope Sofe Switch DC transfer circuit.
Background technology
Existing standby electric application scenario, such as UPS, on-vehicle battery by the energy storage of battery, it is necessary to enter line translation and release.By
In the reason for wide-range voltage converts, traditional translation circuit is mostly based on hard switching pipe scheme, or use high voltage
The component of grade is to meet that wide scope converts the voltage stress brought, but these translation circuit topologys are not easy to output voltage
It is adjusted, its output voltage range is still narrower, limits its scope of application.
In addition, the problem of efficiency is low or volume is larger also be present, such as 3.5KVA, 110V inverter of current railway
Power supply product, the product efficiency of main flow is mostly 85%, and even with technologies such as phase shift bridge Sofe Switch, efficiency also exists mostly
88%, and volume is larger.Compared with comparatively ripe inverter technology, its key issue is just in DC/DC conversion sections：Not yet
The problem of can solve the efficiency and power density under the conditions of battery wide-range voltage.
Utility model content
The purpose of this utility model is to be not easy to be adjusted output voltage to solve existing translation circuit topology
The problem of, propose a kind of wide scope Sofe Switch DC transfer circuit.
In order to solve the above technical problems, the utility model uses following technical scheme：
A kind of wide scope Sofe Switch DC transfer circuit, including first and second series-resonant inverting circuit, first and
Two high-frequency isolation transformers, rectification circuit and controller；The input of first and second series-resonant inverting circuit is used for
Be connected with DC source, two output ends of first and second series-resonant inverting circuit respectively with first and second high frequency every
It is described whole with access after the secondary series connection of first and second high-frequency isolation transformer from the both ends connection of the primary side of transformer
Current circuit, the controller input control signal to first and second described series-resonant inverting circuit, the rectification circuit
Two output ends are used to connect with load.
In some preferred embodiments, the rectifier cell of the rectification circuit for high-frequency rectification diode or possesses
The high-frequency rectification diode of anti-parallel diodes or the HF switch pipe for possessing anti-parallel diodes.
In some preferred embodiments, first and second described high-frequency isolation transformer is that magnetic core is to be provided with air gap
Isolating transformer or primary side are in series with the isolating transformer of resonant inductance or secondary be in series with energy storage inductor isolating transformer or
It is the isolating transformer that coil windings parallel connection outside has inductance.
In some preferred embodiments, the coil turn of the primary side of the first high-frequency isolation transformer and the second high frequency every
Coil turn from the primary side of transformer is identical, the coil turn of the secondary of first high-frequency isolation transformer and described second
The ratio range of the coil turn of the secondary of high-frequency isolation transformer is 0.5 to 2.
In some preferred embodiments, the form of the inverter circuit of first and second series-resonant inverting circuit
Including half bridge circuit and full bridge circuit.
In some preferred embodiments, the first series-resonant inverting circuit include two HF switch pipes (Q3A,
Q4A), the first drive circuit, the first filter capacitor, the first resonant capacitance and the first resonant inductance, the HF switch pipe (Q3A)
Source electrode connect the drain electrode of the HF switch pipe (Q4A), one end of first resonant capacitance and first filter capacitor
One end connection, the drain electrode of the HF switch pipe (Q3A) is connected with the other end of first filter capacitor, and the high frequency is opened
The source electrode for closing pipe (Q4A) is connected with the other end of first resonant capacitance, an output end of the first high-frequency isolation transformer
The intermediate point of the HF switch pipe (Q3A) and the HF switch pipe (Q4A), institute are connected to by first resonant inductance
State another output end and the centre of first resonant capacitance and first filter capacitor of the first high-frequency isolation transformer
Point connection, first drive circuit are connected with the HF switch pipe (Q3A) and the HF switch pipe (Q4A)；
Second series-resonant inverting circuit includes two HF switch pipes (Q3B, Q4B), the second drive circuit, the second filtering
Electric capacity, the second resonant capacitance and the second resonant inductance, the source electrode of the HF switch pipe (Q3B) connect the HF switch pipe
(Q4B) drain electrode, one end of second resonant capacitance are connected with one end of second filter capacitor, the HF switch pipe
(Q3B) drain electrode is connected with the other end of second filter capacitor, the source electrode and described second of the HF switch pipe (Q4B)
The other end connection of resonant capacitance, an output end of the second high-frequency isolation transformer are connected to by second resonant inductance
The intermediate point of the HF switch pipe (Q3B) and the HF switch pipe (Q4B), second high-frequency isolation transformer it is another
Individual output end is connected with second resonant capacitance with the intermediate point of second filter capacitor, second drive circuit and institute
State HF switch pipe (Q3B) and the HF switch pipe (Q4B) connection；
The first series-resonant inverting circuit and the second series-resonant inverting circuit in parallel；Or described first
Series-resonant inverting circuit and the second series-resonant inverting circuit connected in series.
In further preferred embodiment, the rectifier system of the rectification circuit includes voltage multiplying rectifier and full-bridge is whole
Stream.
In some preferred embodiments, the rectifier cell of the rectification circuit is HF switch pipe, and DC source is can
The device or circuit of either energy-absorbing be provided, the load for can energy storage and releasable electric energy device or circuit.
In some preferred embodiments, after the form of DC source includes dc source, battery and AC rectification conversion
Power supply.
In some preferred embodiments, the first series-resonant inverting circuit, the second series-resonant inverting circuit, first
The quantity of high-frequency isolation transformer and the second high-frequency isolation transformer is at least one.
Compared with prior art, the beneficial effects of the utility model have：
With accessing rectified current after the secondary of first high-frequency isolation transformer and the series connection of the secondary of the second high-frequency isolation transformer
Road, the output voltage of translation circuit is the superposition of secondary voltage, is advantageous to carry out output voltage by changing secondary voltage
Adjustment.
In addition, judge that input voltage is multiplied by after transformer turns ratio and reality output according to the predetermined voltage ratio of translation circuit
The height of the actual ratio of voltage, the first series-resonant inverting circuit and the second series-resonant inverting circuit are controlled by controller
Open sequential, the first series-resonant inverting circuit is worked in synchronous or wrong phase mode with the second series-resonant inverting circuit
Formula, so as to change the phase of the secondary voltage of the first high-frequency isolation transformer and the second high-frequency isolation transformer, instantaneous voltage or
One or more of person's polarity.Because the secondary of two transformers is cascaded, their secondary voltage is superposition
Relation, it can be added, suppress or offset each other, in this way, relatively low input voltage can obtain higher or lower output
Voltage, higher input voltage can obtain relatively low or higher output voltage so that the utility model is not only adapted to width
Wide input voltage range, also with broader output voltage range, improve applicability of the present utility model.
Furthermore Sofe Switch can be realized using the mode of resonance of first and second series-resonant inverting circuit, inversion can be reduced
Stress is opened and turned off to each electronic component in circuit, so as to reducing switching loss, is favorably improved the work frequency of inverter circuit
Rate or efficiency, and then reduce volume or improve power density.
In a preferred embodiment, the utility model also has the advantages that：
Further, the primary side of the coil turn of the primary side of the first high-frequency isolation transformer and the second high-frequency isolation transformer
Coil turn it is identical, the ratio ranges of both secondary coil numbers of turn is 0.5 to 2, and best power transmission can be achieved and improve
Utilization rate.
Further, DC source is that can provide the device or circuit of either energy-absorbing, load for can energy storage dress
Put or circuit, the open-minded of sequential and rectification circuit is opened by Reverse Turning Control first and second series-resonant inverting circuit
Sequential, the power supply of transformer secondary can be transmitted back to DC source, so as to realize two-way changing.
Brief description of the drawings
Fig. 1 is the electrical block diagram of translation circuit of the present utility model；
Fig. 2 is the flow chart of control method of the present utility model；
Fig. 3 is the control sequential figure that translation circuit of the present utility model is worked under same-phase pattern；
Fig. 4 is the control sequential figure that translation circuit of the present utility model is worked under misphase bit pattern；
Fig. 5 is a kind of variant of Fig. 1 translation circuit；
Fig. 6 is another variant of Fig. 1 translation circuit；
Fig. 7 is another variant of Fig. 1 translation circuit；
Fig. 8 is the electrical block diagram of another embodiment of the present utility model；
Fig. 9 is the flow chart of the control method of another embodiment of the present utility model.
Embodiment
Embodiment of the present utility model is elaborated below.It is emphasized that the description below is only example
Property, rather than in order to limit the scope of the utility model and its application.
With reference to figure 1, it is inverse that wide scope Sofe Switch DC transfer circuit of the present utility model includes first and second series resonance
Become circuit 210 and 220, first and second high-frequency isolation transformer TRAAnd TRB, rectification circuit 300 and controller 400；First and
The input of second series-resonant inverting circuit 210 and 220 is connected with DC side 100；DC side 100 is connected for first and second
Resonance inversion circuit 210 and 220 provides dc source；Two output ends of the first series-resonant inverting circuit 210 and first high
Frequency isolating transformer TRAPrimary side both ends connection, two output ends of the second series-resonant inverting circuit 220 and the second high frequency
Isolating transformer TRBPrimary side both ends connection, first and second high-frequency isolation transformer TRAAnd TRBSecondary series connection after with connecing
Enter rectification circuit 300, controller 400 inputs control signal, rectification to first and second series-resonant inverting circuit 210 and 220
Two output ends of circuit 300 are connected with supported V 2；Controller 400 judges input electricity according to the predetermined voltage ratio of translation circuit
Pressure is multiplied by the height after transformer turns ratio with the actual ratio of actual output voltage, so as to control opening for series-resonant inverting circuit
Logical sequential makes the first series-resonant inverting circuit 210 and the second series-resonant inverting circuit 220 work in misphase bit pattern or
Same-phase pattern.
Specifically, in the embodiment shown in fig. 1, the first series-resonant inverting circuit 210, the second series-resonant inverting electricity
Road 220, the first high-frequency isolation transformer TRAWith the second high-frequency isolation transformer TRBQuantity be one, the first series resonance
The series-resonant inverting circuit 220 of inverter circuit 210 and second is half bridge circuit, and the rectifier system of rectification circuit 300 is again
Repoussage stream, the rectifier cell of rectification circuit 300 are the HF switch pipe for possessing anti-parallel diodes.DC side 100 includes straight
Stream source V1 and high-voltage energy storage filter capacitor C1, high-voltage energy storage filter capacitor C1 positive and negative both ends respectively with DC source V1 positive and negative two
End connection；First series-resonant inverting circuit 210 includes two HF switch pipes Q3A and Q4A, the first drive circuit 211, first
Filter capacitor Cr2a, the first resonant capacitance Cr1a and the first resonant inductance Lra, HF switch pipe Q3A source electrode connection high frequency are opened
Pipe Q4A drain electrode is closed, the first resonant capacitance Cr1a one end is connected with the first filter capacitor Cr2a one end, HF switch pipe
Q3A drain electrode is connected with the first filter capacitor Cr2a other end, HF switch pipe Q4A source electrode and the first resonant capacitance Cr1a
The other end connection, the first high-frequency isolation transformer TRAAn output end 4A high frequency is connected to by the first resonant inductance Lra
Switching tube Q3A and HF switch pipe Q4A intermediate point, the first high-frequency isolation transformer TRAAnother output end 5A and first it is humorous
The electric capacity Cr1a that shakes is connected with the first filter capacitor Cr2a intermediate point, the first drive circuit 211 and HF switch pipe Q3A and high frequency
Switching tube Q4A connections, the first drive circuit 211 provide drive signal for HF switch pipe Q3A and HF switch pipe Q4A；Second
Series-resonant inverting circuit 220 includes two HF switch pipe Q3B and Q4B, the second drive circuit 221, the second filter capacitors
Cr2b, the second resonant capacitance Cr1b and the second resonant inductance Lrb, HF switch pipe Q3B source electrode connection HF switch pipe Q4B's
Drain electrode, the second resonant capacitance Cr1b one end is connected with the second filter capacitor Cr2b one end, HF switch pipe Q3B drain electrode and
Second filter capacitor Cr2b other end connection, HF switch pipe Q4B source electrode and the second resonant capacitance Cr1b other end connect
Connect, the second high-frequency isolation transformer TRBAn output end 4B by the second resonant inductance Lrb be connected to HF switch pipe Q3B with
HF switch pipe Q4B intermediate point, the second high-frequency isolation transformer TRBAnother output end 5B and the second resonant capacitance Cr1b
It is connected with the second filter capacitor Cr2b intermediate point, the second drive circuit 221 and HF switch pipe Q3B and HF switch pipe Q4B
Connection, the second drive circuit 221 provide drive signal for HF switch pipe Q3B and HF switch pipe Q4B；Controller 400 and
The drive circuit 221 of one drive circuit 211 and second connects, and is sent respectively to the first drive circuit 211 and the second drive circuit 221
Control signal；In the secondary of transformer, the first high-frequency isolation transformer TRASecondary one end 2A and the second high-frequency isolation transformation
Device TRBSecondary one end 1B connections；Rectification circuit 300 includes HF switch pipe Q1 and Q2, electric capacity C4 and C5, filter capacitor C2
With the 3rd drive circuit 310, electric capacity C4 one end and C5 one end series connection, HF switch pipe Q1 source electrode and HF switch pipe Q2
Drain electrode connection, HF switch pipe Q1 drain electrode is connected with one end of the electric capacity C4 other end and filter capacitor C2, and high frequency is opened
The source electrode for closing pipe Q2 is connected with the electric capacity C5 other end and the filter capacitor C2 other end, the first high-frequency isolation transformer TRA's
The other end 1A connection electric capacity C4 and electric capacity C5 of secondary intermediate point, the second high-frequency isolation transformer TRBSecondary other end 2B
HF switch pipe Q1 and HF switch pipe Q2 intermediate point is connected, one end of the 3rd drive circuit 310 is connected with controller 400,
The other both ends of 3rd drive circuit 310 send drive signal to HF switch pipe Q1 and Q2, and supported V 2 is connected on filter capacitor C2
Both ends.
First high-frequency isolation transformer TRAWith the second high-frequency isolation transformer TRBIt is the isolating transformer that magnetic core is provided with air gap
Or primary side is in series with the isolating transformer of resonant inductance or secondary is in series with the isolating transformer or coil windings of energy storage inductor
Parallel connection outside has the isolating transformer of inductance, and the size of magnetic core air gap is total to by positive and negative sharp ratio and system input/output argument
With decision, the former and deputy side coefficient of coup without do specific setting in addition.First high-frequency isolation transformer TRAWith the second high-frequency isolation
Transformer TRBMagnetic core be provided with air gap, have certain leakage inductance, make the first high-frequency isolation transformer TRAWith the second high-frequency isolation transformer
TRBCan be in two states of normal shock and flyback.Its leakage inductance is obtained by natural technique for coiling, meanwhile, according to the actual needs,
Changeable leakage inductance can be obtained by the change of technique for coiling.Certainly, if the leakage inductance sensibility reciprocal of natural coiling is insufficient to,
Can also outside secondary side coilloading.Isolating transformer does not have to the end points tie point for deliberately distinguishing primary side and secondary, that is, does not have to examine
Consider the initiating terminal of isolating transformer.
The input sample signal of one end 401 of controller 400, the other end 402 export sampled signal.When DC side 100 is low
During pressure input, with reference to figure 1, after the first series-resonant inverting circuit 210 is in parallel with the second series-resonant inverting circuit 220 with high pressure
Energy storage filter capacitor C1 both ends+BUS connects with-BUS, namely the first series-resonant inverting circuit 210 and the second series resonance
Input after the parallel connection of inverter circuit 220 is connected with DC source V1.
With reference to figure 2, when wide scope Sofe Switch DC transfer circuit of the present utility model works, by the first high-frequency isolation transformation
Device TRASecondary voltage and the second high-frequency isolation transformer TRBSecondary voltage be overlapped, also using following control method：
Predetermined voltage ratio is set；Generally, voltage of the actual output voltage of translation circuit needed for not above load, because
This, by setting predetermined voltage ratio to constrain actual output voltage；According to different loads, controller 400 can set difference
Predetermined voltage ratio；
Gather input voltage；Specifically, after translation circuit work, controller 400 gathers the first high-frequency isolation transformer TRA
Input voltage VIN-TRAWith the second high-frequency isolation transformer TRBInput voltage VIN-TRB；
Judge that input voltage is multiplied by after transformer turns ratio and actual output voltage according to the predetermined voltage ratio of translation circuit
Actual ratio height：If actual ratio is high, the sequential of opening of control series-resonant inverting circuit makes the first series resonance
The series-resonant inverting circuit 220 of inverter circuit 210 and second works in misphase bit pattern；If actual ratio is low, control series connection
The sequential of opening of resonance inversion circuit makes the first series-resonant inverting circuit 210 be worked with the second series-resonant inverting circuit 220
In same-phase pattern；Specifically, the height of input voltage influences the height of actual output voltage, and actual output voltage should not
Higher than the voltage needed for load, actual ratio and predetermined voltage ratio are compared, the height of actual ratio is judged, according to
The height of actual ratio make the first series-resonant inverting circuit 210 and the second series-resonant inverting circuit 220 work in it is synchronous or
Person's misphase bit pattern, so that actual output voltage meets the voltage needed for supported V 2；Actual ratio is (VIN-TRAnTRA+VIN- TRBnTRB)/Vout, wherein, nTRAFor the first high-frequency isolation transformer TRATurn ratio (turn ratio), nTRBFor the second high-frequency isolation transformation
Device TRBTurn ratio (turn ratio), VoutFor the actual output voltage of translation circuit.
Inverter circuit, which works in misphase bit pattern or same-phase pattern, makes the voltage after secondary superposition decline or raise, from
And widen the scope of output DC voltage；Specifically, when inverter circuit works in misphase bit pattern, after transformer secondary superposition
Voltage can decline；When inverter circuit works in same-phase pattern, the voltage after transformer secondary superposition can raise.
First series-resonant inverting circuit 210 and the second series-resonant inverting circuit 220 pass through HF switch Guan Laishi
Existing inversion, the sequential of opening of inverter circuit is controlled actually namely to open sequential in control HF switch pipe.
If same-phase pattern, the HF switch pipe and the second series-resonant inverting of the first series-resonant inverting circuit 210
The HF switch pipe of circuit 220 is open-minded in identical phase, the first high-frequency isolation transformer TRASecondary 1A and 2A both end voltage
Phase and the second high-frequency isolation transformer TRBSecondary 1B and 2B both end voltages phase it is identical, polarity is identical, two secondary
Voltage is added, and rectification circuit 300 works, and the energy of DC side 100 is transported to supported V 2, when the phase of two inverter circuits is complete
When complete consistent, output voltage can reach maximum.Because the first series-resonant inverting circuit 210 and the second series resonance are inverse
It is series resonant circuit to become circuit 220, therefore translation circuit can realize the process of a resonant transformation, in full operating range
It is interior, change the working frequency or dutycycle of inverter circuit according to the situation of supported V 2, it is ensured that the high frequency in inverter circuit
Switching tube obtains Sofe Switch, reduces switching loss, the advantages of effectively make use of series resonant circuit, realizes that high efficiency converts.
HF switch pipe Q1 and Q2 in rectification circuit 300, if DC source V1 release current is less than setting electric current, setting electric current tool
Body may be configured as 0.1 times of rated current, and the switching tube in rectification circuit 300 is not open-minded, and the work of rectification circuit 300 is diode
Rectification state, that is, utilize the parasitic diode natural commutation of switching tube；If DC source V1 release current more than setting electric current,
HF switch pipe Q1 and Q2 receive PWM drive signal, and the work of rectification circuit 300 is lock-in tube rectification state, relevant control sequential
With reference to figure 2, the sequential of opening of rectification circuit 300 enters line displacement based on the center for opening sequential of series-resonant inverting circuit
And it is front and rear leave dead band, specifically, HF switch pipe Q1, Q2's opens sequential respectively with HF switch pipe Q3, Q4 when opening
Enter line displacement based on the center of sequence and leave certain dead time, prevent diode and do not open electric current under situation and pour in down a chimney
Or short circuit, certain dead time is also left between HF switch pipe Q3 and Q4, to prevent shoot through.
Misphase bit pattern：Controller 400 judges that actual ratio is too high, if work is same phase according to predetermined voltage ratio
Bit pattern can then cause output voltage to be higher than required voltage, can not be realized in other words by modulating frequency and dutycycle
Decompression, therefore controller 400 can judge that inverter circuit needs work as misphase bit pattern.If misphase bit pattern, the first series connection is humorous
Shake the HF switch pipe of inverter circuit 210 and the HF switch pipe of the second series-resonant inverting circuit 220 phase bit that staggers is opened
It is logical, the first high-frequency isolation transformer TRASecondary 1A and 2A both end voltage phase and the second high-frequency isolation transformer TRBPair
The phase of side 1B and 2B both end voltage can be identical, but polarity is likely to occur opposite situation；Or polarity phase is simultaneously as resonance
Point voltage is different, and instantaneous voltage also just differs, so the first high-frequency isolation transformer TRASecondary voltage and the second high frequency
Isolating transformer TRBSecondary voltage mutually can be suppressed or be offset, it can be seen that, shadow of both meetings by resonance phase point
Ring, be no longer original simple superposition, i.e., voltage peak can be offset, and the output voltage of translation circuit can correspondingly decline.It is related
Control sequential opens sequential based on the center for opening sequential of series-resonant inverting circuit with reference to figure 3, rectification circuit 300
Enter line displacement and it is front and rear leave dead band, specifically, HF switch pipe Q3A and Q3B misphases position is open-minded, HF switch pipe Q4A and Q4B
Misphase position is open-minded, and remaining is similar with same-phase pattern.
Further to change output voltage, with the following method：Control the first series-resonant inverting circuit 210 and the second string
Connection resonance inversion circuit 220 change the first series-resonant inverting circuit 210 while opening sequential and the second series resonance is inverse
Become the working frequency of circuit 220 with further rise or reduce output voltage.
Understood according to above-mentioned, in the utility model, the secondary of the first high-frequency isolation transformer and the second high-frequency isolation become
With accessing rectification circuit after the secondary series connection of depressor, the output voltage of translation circuit is the superposition of secondary voltage, is advantageous to pass through
Change secondary voltage to be adjusted to output voltage.Secondly, input voltage is judged according to the predetermined voltage ratio of translation circuit
The height with the actual ratio of actual output voltage after transformer turns ratio is multiplied by, the first series-resonant inverting is controlled by controller
Circuit and the second series-resonant inverting circuit open sequential, make the first series-resonant inverting circuit and the second series-resonant inverting
Circuit works in synchronization or misphase bit pattern, so as to change the first high-frequency isolation transformer and the second high-frequency isolation transformer
One or more of phase, instantaneous voltage or polarity of secondary voltage.Because the secondary of two transformers is to be connected on one
Rise, their secondary voltage is overlaying relation, can be added, suppresses or offset each other, in this way, relatively low input voltage
Higher or lower output voltage can be obtained, higher input voltage can obtain relatively low or higher output voltage so that
The utility model is not only adapted to the input voltage range of broadness, also with broader output voltage range, improves this reality
With new applicability.Simultaneously as first and second series-resonant inverting circuit is series resonant topology, work as inverter circuit
Working frequency when being resonant frequency, can obtain maximum output voltage in the secondary of high-frequency isolation transformer, it is therefore, inverse changing
Become the working frequency for changing them while opening sequential of circuit, output voltage can be made further to raise or reduce, from
And further increase applicability of the present utility model.In addition, the resonant mode using first and second series-resonant inverting circuit
Formula can realize Sofe Switch, and can reduce each electronic component in inverter circuit opens and turn off stress, so as to reduce switching loss, has
Help improve the working frequency or efficiency of inverter circuit, and then reduce volume or improve power density.Especially, rectified current
The rectifier cell on road is HF switch pipe, and synchronous rectification can be achieved, by opening sequential to rectification circuit and inverter circuit
It is controlled, the reverse conversion of the DC voltage at exportable end.
The utility model Fig. 1 embodiment is illustrated above, but the utility model there can also be some modifications
Form, such as：
With reference to figure 5, the rectifier cell of rectification circuit 300 can also be high-frequency rectification diode, specifically include high-frequency rectification
Diode D1 and D2, the rectifier system of rectification circuit 300 is voltage multiplying rectifier；Likewise, inverter circuit also has same-phase pattern
With misphase bit pattern, the conducting bar of the high-frequency rectification diode in rectification circuit 300 is met after the voltage superposition of transformer secondary
Rectification circuit 300 turns on during part, and under misphase bit pattern, the superimposed voltage of transformer secondary understands step-down in the period staggered,
Rectification circuit 300 is not turned on, output voltage step-down；
With reference to figure 6, the rectifier system of rectification circuit 300 can also be full-bridge rectification, including four high-frequency rectification diodes
D1 to D4, wherein high-frequency rectification diode D3 and D4 instead of electric capacity C4 and C5 respectively；Certainly, four high-frequency rectification diodes
It can be replaced with the HF switch pipe for possessing anti-parallel diodes；
First high-frequency isolation transformer TRAPrimary side coil turn and the second high-frequency isolation transformer TRBPrimary side line
It is identical to enclose the number of turn, the first high-frequency isolation transformer TRASecondary coil turn and the second high-frequency isolation transformer TRBSecondary
Coil turn ratio range be 0.5 to 2, so can be achieved best power transmit and increase operation rate；
DC source V1 form includes the power supply after dc source, battery and AC rectification conversion；
With reference to figure 7, the form of the first series-resonant inverting circuit 210 and the second series-resonant inverting circuit 220 can be with
It is full bridge circuit；Inverter circuit uses full bridge circuit, the input current of translation circuit is identical, input voltage also identical
In the case of, the original edge voltage of full bridge circuit is twice of half bridge circuit, then the power output of power full formula circuit is
Twice of half bridge circuit, namely full bridge circuit are adapted to high-power output.
Fig. 8 represents another embodiment of the present utility model, and the difference of the embodiment and above-described embodiment is：Work as direct current
When side 100 is high input voltage, the first series-resonant inverting circuit 210 connected with the second series-resonant inverting circuit 220 after with height
Pressure energy storage filter capacitor C1 both ends+BUS connects with-BUS, namely the first series-resonant inverting circuit 210 connected with second it is humorous
Input after the inverter circuit 220 that shakes series connection is connected with DC source V1.The embodiment also has the beneficial effect of above-described embodiment,
Especially, the embodiment is adapted to the input of translation circuit to be high-tension occasion.
With reference to figure 9, in another embodiment of the present utility model, judge according to the predetermined voltage ratio of translation circuit
Input voltage is multiplied by after transformer turns ratio with the height of the actual ratio of actual output voltage to control when opening of inverter circuit
On the basis of sequence, real-time voltage and release current size always according to DC source V1, change the first series-resonant inverting circuit
210 and second series-resonant inverting circuit 220 and rectification circuit 300 frequency size.When translation circuit and load connect production
During raw electric current, change the working frequency size of inverter circuit and rectification circuit, can raise or reduce output voltage, enter one
Step has widened the scope of output voltage.
In another embodiment of the present utility model, with reference to figure 1, the rectifier cell of rectification circuit 300 is HF switch
Pipe, DC source V1 be can provide the circuit of energy either device or be energy-absorbing circuit or device, as battery,
Dc bus or can two-way changing pfc circuit, supported V 2 for can energy storage and releasable electric energy circuit or device such as electricity
Pond；It is positive or reversely apply the first series-resonant inverting circuit 210 and the second series-resonant inverting circuit 220 opens sequential
And rectification circuit 300 opens sequential.The power supply of transformer secondary can be transmitted back to DC source V1, so as to realize two-way change
Change.
Further embodiment of the present utility model, the difference of the embodiment and above-described embodiment are：First series resonance
The quantity of inverter circuit and the first high-frequency isolation transformer is two.The secondary series connection of two the first series-resonant inverting circuits
The secondary again with the second series-resonant inverting circuit is connected afterwards.
Above content is to combine specific/preferred embodiment further detailed description of the utility model, no
It can assert that specific implementation of the present utility model is confined to these explanations.For the common skill of the utility model art
For art personnel, without departing from the concept of the premise utility, it can also make to the embodiment that these have been described
Some replacements or modification, and these are substituted or variant should all be considered as belonging to the scope of protection of the utility model.
Claims (10)
- A kind of 1. wide scope Sofe Switch DC transfer circuit, it is characterised in that：Including first and second series-resonant inverting circuit, First and second high-frequency isolation transformer, rectification circuit and controller；First and second series-resonant inverting circuit it is defeated Enter end to be used to be connected with DC source, two output ends of first and second series-resonant inverting circuit are respectively with first and the The both ends connection of the primary side of two high-frequency isolation transformers, with connecing after the secondary series connection of first and second high-frequency isolation transformer Enter the rectification circuit, the controller inputs control signal to first and second described series-resonant inverting circuit, described whole Two output ends of current circuit are used to connect with load.
- 2. wide scope Sofe Switch DC transfer circuit as claimed in claim 1, it is characterised in that：The rectification of the rectification circuit Element is high-frequency rectification diode or the HF switch pipe for possessing anti-parallel diodes.
- 3. wide scope Sofe Switch DC transfer circuit as claimed in claim 1, it is characterised in that：First and second described high frequency Isolating transformer be magnetic core be provided with air gap isolating transformer or primary side be in series with the isolating transformer or secondary of resonant inductance Being in series with the isolating transformer of energy storage inductor or coil windings parallel connection outside has the isolating transformer of inductance.
- 4. wide scope Sofe Switch DC transfer circuit as claimed in claim 1, it is characterised in that：First high-frequency isolation transformer Primary side coil turn it is identical with the coil turn of the primary side of the second high-frequency isolation transformer, the first high-frequency isolation transformation The ratio range of the coil turn of the secondary of device and the coil turn of the secondary of second high-frequency isolation transformer is 0.5 to 2.
- 5. wide scope Sofe Switch DC transfer circuit as claimed in claim 1, it is characterised in that：First and second described series connection The form of resonance inversion circuit includes half bridge circuit and full bridge circuit.
- 6. the wide scope Sofe Switch DC transfer circuit as described in claim any one of 1-5, it is characterised in that：First series-resonant inverting circuit includes two HF switch pipes (Q3A, Q4A), the first drive circuit, the first filtered electricals Hold, the first resonant capacitance and the first resonant inductance, the source electrode of the HF switch pipe (Q3A) connect the HF switch pipe (Q4A) drain electrode, one end of first resonant capacitance are connected with one end of first filter capacitor, the HF switch pipe (Q3A) drain electrode is connected with the other end of first filter capacitor, the source electrode and described first of the HF switch pipe (Q4A) The other end connection of resonant capacitance, an output end of the first high-frequency isolation transformer are connected to by first resonant inductance The intermediate point of the HF switch pipe (Q3A) and the HF switch pipe (Q4A), first high-frequency isolation transformer it is another Individual output end is connected with first resonant capacitance with the intermediate point of first filter capacitor, first drive circuit and institute State HF switch pipe (Q3A) and the HF switch pipe (Q4A) connection；Second series-resonant inverting circuit includes two HF switch pipes (Q3B, Q4B), the second drive circuit, the second filtered electricals Hold, the second resonant capacitance and the second resonant inductance, the source electrode of the HF switch pipe (Q3B) connect the HF switch pipe (Q4B) drain electrode, one end of second resonant capacitance are connected with one end of second filter capacitor, the HF switch pipe (Q3B) drain electrode is connected with the other end of second filter capacitor, the source electrode and described second of the HF switch pipe (Q4B) The other end connection of resonant capacitance, an output end of the second high-frequency isolation transformer are connected to by second resonant inductance The intermediate point of the HF switch pipe (Q3B) and the HF switch pipe (Q4B), second high-frequency isolation transformer it is another Individual output end is connected with second resonant capacitance with the intermediate point of second filter capacitor, second drive circuit and institute State HF switch pipe (Q3B) and the HF switch pipe (Q4B) connection；The first series-resonant inverting circuit and the second series-resonant inverting circuit in parallel；Or first series connection Resonance inversion circuit and the second series-resonant inverting circuit connected in series.
- 7. wide scope Sofe Switch DC transfer circuit as claimed in claim 1, it is characterised in that：The rectification of the rectification circuit Mode includes voltage multiplying rectifier and full-bridge rectification.
- 8. wide scope Sofe Switch DC transfer circuit as claimed in claim 1, it is characterised in that：The rectification of the rectification circuit Element is HF switch pipe, and DC source is the device or circuit that can provide either energy-absorbing, and the load is can energy storage And the device or circuit of releasable electric energy.
- 9. the wide scope Sofe Switch DC transfer circuit as described in any one of claim 1-5,7-8, it is characterised in that：DC source Form include dc source, battery and AC rectification conversion after power supply.
- 10. the wide scope Sofe Switch DC transfer circuit as described in any one of claim 1-5,7-8, it is characterised in that：First Series-resonant inverting circuit, the second series-resonant inverting circuit, the first high-frequency isolation transformer and the second high-frequency isolation transformer Quantity be at least one.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721012741.7U CN207184330U (en) | 2017-08-14 | 2017-08-14 | A kind of wide scope Sofe Switch DC transfer circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721012741.7U CN207184330U (en) | 2017-08-14 | 2017-08-14 | A kind of wide scope Sofe Switch DC transfer circuit |
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| CN207184330U true CN207184330U (en) | 2018-04-03 |
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| CN201721012741.7U Expired - Fee Related CN207184330U (en) | 2017-08-14 | 2017-08-14 | A kind of wide scope Sofe Switch DC transfer circuit |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108418451A (en) * | 2018-05-03 | 2018-08-17 | 深圳鹏城新能科技有限公司 | A kind of multiple voltage output device of high-frequency isolation |
| CN108631596A (en) * | 2018-04-24 | 2018-10-09 | 同济大学 | A kind of wide range of power converter of composite resonant |
| CN109039121A (en) * | 2018-10-31 | 2018-12-18 | 深圳市高益智能电气有限公司 | A kind of high-frequency isolation type ac-dc conversion circuit and its control method |
| WO2019033603A1 (en) * | 2017-08-14 | 2019-02-21 | 深圳市保益新能电气有限公司 | Wide-range soft-switch direct-current conversion circuit and control method therefor |
| CN110752748A (en) * | 2019-08-29 | 2020-02-04 | 广东寰宇电子科技股份有限公司 | Soft switching circuit |
| WO2020024731A1 (en) * | 2018-08-01 | 2020-02-06 | 中兴通讯股份有限公司 | Direct current converter, method and device for controlling direct current converter, and storage medium |
| CN111987923A (en) * | 2020-08-07 | 2020-11-24 | 西北工业大学 | High-power high step-up ratio direct current converter adopting matrix transformer |
| CN112713779A (en) * | 2020-12-15 | 2021-04-27 | 杭州中恒电气股份有限公司 | Wide-voltage-range online gear switching method and system and direct-current module |
| CN118041086A (en) * | 2024-04-10 | 2024-05-14 | 昱能科技股份有限公司 | Control method, device and equipment of phase-shifting full-bridge converter and storage medium |
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- 2017-08-14 CN CN201721012741.7U patent/CN207184330U/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2019033603A1 (en) * | 2017-08-14 | 2019-02-21 | 深圳市保益新能电气有限公司 | Wide-range soft-switch direct-current conversion circuit and control method therefor |
| CN108631596A (en) * | 2018-04-24 | 2018-10-09 | 同济大学 | A kind of wide range of power converter of composite resonant |
| CN108418451A (en) * | 2018-05-03 | 2018-08-17 | 深圳鹏城新能科技有限公司 | A kind of multiple voltage output device of high-frequency isolation |
| WO2020024731A1 (en) * | 2018-08-01 | 2020-02-06 | 中兴通讯股份有限公司 | Direct current converter, method and device for controlling direct current converter, and storage medium |
| CN109039121A (en) * | 2018-10-31 | 2018-12-18 | 深圳市高益智能电气有限公司 | A kind of high-frequency isolation type ac-dc conversion circuit and its control method |
| CN109039121B (en) * | 2018-10-31 | 2024-05-10 | 南京熊猫电子股份有限公司 | High-frequency isolation type alternating current-direct current conversion circuit and control method thereof |
| CN110752748A (en) * | 2019-08-29 | 2020-02-04 | 广东寰宇电子科技股份有限公司 | Soft switching circuit |
| CN111987923A (en) * | 2020-08-07 | 2020-11-24 | 西北工业大学 | High-power high step-up ratio direct current converter adopting matrix transformer |
| CN112713779A (en) * | 2020-12-15 | 2021-04-27 | 杭州中恒电气股份有限公司 | Wide-voltage-range online gear switching method and system and direct-current module |
| CN118041086A (en) * | 2024-04-10 | 2024-05-14 | 昱能科技股份有限公司 | Control method, device and equipment of phase-shifting full-bridge converter and storage medium |
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