CN208337412U - A kind of three-level LLC resonance inverter of wide-range voltage output - Google Patents
A kind of three-level LLC resonance inverter of wide-range voltage output Download PDFInfo
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- CN208337412U CN208337412U CN201820331095.9U CN201820331095U CN208337412U CN 208337412 U CN208337412 U CN 208337412U CN 201820331095 U CN201820331095 U CN 201820331095U CN 208337412 U CN208337412 U CN 208337412U
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Abstract
The utility model discloses a kind of three-level LLC resonance inverters of wide-range voltage output, characterized in that including DC capacitor, the first bridge arm, the second bridge arm, resonance circuit, rectifier bridge and the load being sequentially connected electrically.The utility model proposes three-level LLC resonance inverter output voltage can be ± U/2 and ± U, traditional LLC resonant converter output voltage is ± U, the utility model proposes three-level LLC resonance inverter output voltage range be twice of output voltage of traditional LLC circuit, high pressure and low pressure output can be met simultaneously, and each switching device can realize that no-voltage is open-minded, the cost and loss for not increasing system meet voltage range and export wider occasion.
Description
Technical field
The utility model relates to a kind of three-level LLC resonance inverters of wide-range voltage output, belong to power technology neck
Domain.
Background technique
The shortcomings that existing LLC resonant converter is that voltage output range is smaller, and it is wider not to be suitable for output voltage range
Occasion.The utility model proposes three-level LLC resonance inverter, high pressure and low pressure output can be met simultaneously, and each
Switching device can realize that no-voltage is open-minded, not increase the loss of system, meet voltage range and export wider occasion.
Utility model content
To solve the deficiencies in the prior art, the purpose of this utility model is to provide a kind of three electricity of wide-range voltage output
Flat LLC resonant converter can meet high pressure and low pressure output simultaneously, and each switching device can realize that no-voltage is open-minded,
The loss for not increasing system meets voltage range and exports wider occasion.
In order to achieve the above objectives, the utility model adopts the following technical solutions: the three of a kind of output of wide-range voltage
Level LLC resonance inverter, characterized in that including DC capacitor, the first bridge arm, the second bridge arm, the resonance electricity being sequentially connected electrically
Road, rectifier bridge and load.
A kind of three-level LLC resonance inverter of wide-range voltage output above-mentioned, characterized in that the DC capacitor packet
Include the first DC capacitor C1 and the second DC capacitor C2, the anode of the first DC capacitor C1 cathode and the second DC capacitor is connected；
First bridge arm includes the first MOSFET element Q11, the second MOSFET element Q12, third MOSFET element
Q13, the 4th MOSFET element Q14, third capacitor C11, the 4th capacitor C14, first diode D1 and the second diode D2；First
The drain electrode of the source electrode of MOSFET element Q11 and the second MOSFET element Q12 is connected, the source electrode of the second MOSFET element Q12 and the
The drain electrode of three MOSFET device Q13 is connected, the drain electrode of the source electrode and the 4th MOSFET element Q14 of third MOSFET element Q13
It is connected；Third capacitor C11 and the first MOSFET element Q11 are in parallel, and the 4th capacitor C14 and the 4th MOSFET element Q14 are in parallel；
The cathode of the anode of first diode D1 and the second diode D2 are connected, the cathode of first diode D1 and the first MOSFET element
The source electrode of Q11 is connected, and the drain electrode of the anode and the 4th MOSFET element Q14 of the second diode D2 is connected；
Second bridge arm includes the 5th MOSFET element Q21, the 6th MOSFET element Q22, the 7th MOSFET element
Q23, the 8th MOSFET element Q24, the 5th capacitor C21, the 6th capacitor C24, third diode D3 and the 4th diode D4；5th
The drain electrode of the source electrode of MOSFET element Q21 and the 6th MOSFET element Q22 is connected, the source electrode of the 6th MOSFET element Q22 and the
The drain electrode of seven MOSFET device Q23 is connected, the drain electrode of the source electrode and the 8th MOSFET element Q24 of the 7th MOSFET element Q23
It is connected；5th capacitor C21 and the 5th MOSFET element Q21 are in parallel, and the 6th capacitor C24 and the 8th MOSFET element Q24 are in parallel；
The anode of third diode D3 and the cathode of the 4th diode D4 are connected, the cathode and the 5th MOSFET element of third diode D3
The source electrode of Q21 is connected, and the drain electrode of the anode and the 8th MOSFET element Q24 of the 4th diode D4 is connected；
The both ends at the both ends of the DC capacitor, the both ends of the first bridge arm and the second bridge arm are respectively connected with, the first bridge arm
The anode of first diode D1 is connected with the cathode of the first capacitor C1 of DC capacitor 1, the first diode D1's of the first bridge arm
The anode of the third diode D3 of anode and the second bridge arm is connected.
A kind of three-level LLC resonance inverter of wide-range voltage output above-mentioned, characterized in that the third capacitor
The capacitance of C11 and the 4th capacitor C14 are respectively greater than the knot electricity of the first MOSFET element Q11 and the 4th MOSFET element Q13
Hold.
A kind of three-level LLC resonance inverter of wide-range voltage output above-mentioned, characterized in that the 5th capacitor
The capacitance of C21 and the 6th capacitor C24 are respectively greater than the knot electricity of the 5th MOSFET element Q21 and the 8th MOSFET element Q24
Hold.
The three-level LLC resonance inverter of a kind of wide-range voltage output above-mentioned, characterized in that first bridge arm
The source electrode of second MOSFET element Q12 is as output terminals A, and the source electrode of the 6th MOSFET element Q22 of the second bridge bridge arm is as defeated
Outlet B, AB output end output voltage is U0。
A kind of three-level LLC resonance inverter of wide-range voltage output above-mentioned, characterized in that the resonance circuit packet
Resonant capacitance Cr, resonant inductance Lr, transformer T are included, output terminals A connects one end of resonant inductance Lr, the other end of resonant inductance Lr
Resonant capacitance Cr, the primary side of another termination transformer T of resonant capacitance Cr are met, output end B connects the other end of transformer T primary side；
Secondary side, rectifier bridge and the load of the transformer T is sequentially connected electrically.
The utility model it is achieved the utility model has the advantages that the utility model proposes three-level LLC resonance inverter relative to
Traditional LLC, output voltage range are twice as, and can meet high pressure and low pressure output simultaneously, and each switching device can
It realizes that no-voltage is open-minded, while not increasing the cost and loss of system, meet voltage range and export wider occasion.
Detailed description of the invention
Fig. 1 is three-level LLC resonance inverter circuit diagram；
Fig. 2 is three-level LLC resonance inverter output electric current forward direction schematic diagram；
Fig. 3 is the MOSFET element driving signal that three-level LLC resonance inverter output voltage is ± U/2；
Fig. 4 is the MOSFET element driving signal that three-level LLC resonance inverter output voltage is ± U.
Specific embodiment
The utility model is further described with reference to the accompanying drawing.Following embodiment is only used for clearly illustrating this
The technical solution of utility model, and cannot be used as a limitation the limitation protection scope of the utility model.
As shown in Figure 1, a kind of three-level LLC resonance inverter of wide-range voltage output, including DC capacitor 1, first
Bridge arm 2, the second bridge arm 3, resonance circuit 4, rectifier bridge and load；
DC capacitor 1 includes the first DC capacitor C1 and the second DC capacitor C2, the first DC capacitor C1 cathode and second
The anode of DC capacitor is connected；
First bridge arm 2 include the first MOSFET element Q11, the second MOSFET element Q12, third MOSFET element Q13,
4th MOSFET element Q14, third capacitor C11, the 4th capacitor C14, first diode D1 and the second diode D2；First
The drain electrode of the source electrode of MOSFET element Q11 and the second MOSFET element Q12 is connected, the source electrode of the second MOSFET element Q12 and the
The drain electrode of three MOSFET device Q13 is connected, the drain electrode of the source electrode and the 4th MOSFET element Q14 of third MOSFET element Q13
It is connected；Third capacitor C11 and the first MOSFET element Q11 are in parallel, and the 4th capacitor C14 and the 4th MOSFET element Q14 are in parallel；
The capacitance of third capacitor C11 and the 4th capacitor C14 are respectively greater than the first MOSFET element Q11 and the 4th MOSFET element Q13
Junction capacity；The cathode of the anode of first diode D1 and the second diode D2 are connected, the cathode of first diode D1 and first
The source electrode of MOSFET device Q11 is connected, and the drain electrode of the anode and the 4th MOSFET element Q14 of the second diode D2 is connected.
Second bridge arm 2 include the 5th MOSFET element Q21, the 6th MOSFET element Q22, the 7th MOSFET element Q23,
8th MOSFET element Q24, the 5th capacitor C21, the 6th capacitor C24, third diode D3 and the 4th diode D4；5th
The drain electrode of the source electrode of MOSFET element Q21 and the 6th MOSFET element Q22 is connected, the source electrode of the 6th MOSFET element Q22 and the
The drain electrode of seven MOSFET device Q23 is connected, the drain electrode of the source electrode and the 8th MOSFET element Q24 of the 7th MOSFET element Q23
It is connected；5th capacitor C21 and the 5th MOSFET element Q21 are in parallel, and the 6th capacitor C24 and the 8th MOSFET element Q24 are in parallel.
The capacitance of 5th capacitor C21 and the 6th capacitor C24 is respectively greater than the 5th MOSFET element Q21 and the 8th MOSFET element Q24
Junction capacity；The anode of third diode D3 and the cathode of the 4th diode D4 are connected, the cathode and the 5th of third diode D3
The source electrode of MOSFET device Q21 is connected, and the drain electrode of the anode and the 8th MOSFET element Q24 of the 4th diode D4 is connected.
The both ends at the both ends of DC capacitor 1, the both ends of the first bridge arm 2 and the second bridge arm 3 are respectively connected with, the first bridge arm 2
The anode of first diode D1 is connected with the cathode of the first capacitor C1 of DC capacitor 1, the first diode D1's of the first bridge arm 2
The anode of the third diode D3 of anode and the second bridge arm 3 is connected.
The source electrode of second MOSFET element Q12 of the first bridge arm 2 is as output terminals A, and the 6th of the second bridge bridge arm 3 the
For the source electrode of MOSFET element Q22 as output end B, AB output end output voltage is U0。
Resonance circuit 4 includes resonant capacitance Cr, resonant inductance Lr, transformer T, and output terminals A connects one end of resonant inductance Lr,
The primary side of another termination transformer T of another termination resonant capacitance Cr of resonant inductance Lr, resonant capacitance Cr, output end B connect change
The other end of depressor T primary side.
Secondary side, rectifier bridge and the load of transformer T is sequentially connected electrically.
By controlling the switch state of the first bridge arm and the second bridge arm MOSFET pipe, output voltage U0It is available different
Voltage, U0Available ± U and two kinds of voltage output states of ± U/2, while all MOSFET pipes can realize that no-voltage is opened
Logical, U is the voltage at 1 both ends of DC capacitor.
When needing AB output end output voltage U0When=± U/2, specific step is as follows, MOSFET element switching tube driving letter
Number as shown in Figure 3:
1), open the MOSFET element Q11 and Q12 of the first bridge arm, turn off the first bridge arm MOSFET device Q13 and
Q14 opens the MOSFET element Q22 and Q23 of the second bridge arm, turns off the second bridge arm MOSFET element Q21 and Q24, at this time the end AB
Output voltage U0=U/2, electric current flow through C1, Q11, Q12, Lr, Cr, transformer T, Q23 and D4.Current direction is forward direction, is such as schemed
Shown in 2；
2), turn off the MOSFET element Q11 of the first bridge arm, electric current keeps former direction flowing, electric current flow through C1, C11,
Q12, Lr, Cr, transformer T, Q23, D4, capacitor C11 charging；
3), when voltage is equal to U/2 on C11, the upper pressure drop of Q13 is zero, opens MOSFET element Q13 at this time, and Q13 is realized
No-voltage is open-minded, electric current forward flow, flows through D1, Q12, Lr, Cr, transformer T, Q23 and D4, AB output voltage U0=0；
4) the MOSFET element Q12 of the first bridge arm is turned off, capacitor C14 passes through Q13, Lr, Cr, transformer T, Q23, D4, C2
Electric discharge, electric current forward flow, the end AB output voltage reduce；
5) it when, the upper voltage of C14 is equal to zero, opens the first bridge arm MOSFET element Q14, Q14 and realizes that no-voltage is open-minded, electric current
Reverse flow flows through C2, D3, Q22, transformer T, Cr, Lr, Q13, Q14, the end AB output voltage U0=-U/2；
6), turn off the first bridge arm MOSFET element Q14, reverse direction current flow, flow through C2, D3, Q22, transformer T, Cr,
Lr, Q13, C14, capacitor C14 charging, the end AB output voltage become larger；
7), when C14 voltage is equal to U/2, the upper pressure drop of Q12 is equal to 0, opens Q12 at this time, and Q12 realizes that no-voltage is open-minded, electricity
Stream flows through D3, Q22, transformer T, Cr, Lr, Q13, D2, reverse direction current flow, the end AB output voltage U0=0；
8), turn off the second bridge arm MOSFET element Q22, electric current keep reverse flow, flow through C24, Q23, transformer T, Cr,
Lr, Q13, D2, C2, capacitor C24 electric discharge；
9) when, C24 voltage is equal to 0, open Q24, Q24 realizes that no-voltage is open-minded, electric current forward flow, electric current flow through C2,
D1, Q12, Lr, Cr, transformer T, Q23, Q24, the end AB output voltage U0=U/2；
10) Q24, is turned off, electric current keeps forward flow, flows through C2, D1, Q12, Lr, Cr, transformer T, Q23, C24, capacitor
C24 charging；
11), when C24 voltage is equal to U/2, the voltage on Q22 is equal to 0, opens Q22 at this time, and Q22 realizes that no-voltage is opened
Logical, electric current flows through D1, Q12, Lr, Cr, transformer T, Q23, D4, the end AB output voltage U0=0；
12) Q23, is turned off, electric current flows through C21, C1, D1, Q12, Lr, Cr, transformer T, Q22, capacitor C21 electric discharge；
13) when, the upper voltage of C21 is equal to 0, Q21 is opened, Q21 realizes that no-voltage is open-minded, and reverse direction current flow, electric current flows through
C1, Q21, Q22, transformer T, Cr, Lr, Q13, D2, AB output voltage U0=-U/2.
When needing AB output voltage U0When=± U, specific step is as follows, and switching tube driving signal is as shown in Fig. 4:
1) MOSFET element Q11, Q12 of the first bridge arm, MOSFET element Q23, Q24 of the second bridge arm, shutdown, are opened
First bridge arm MOSFET element Q13, Q14, shutdown the second bridge arm MOSFET device Q21, Q22, electric current flow through C1, Q11, Q12,
Lr, Cr, transformer T, Q23, Q24, C2, electric current forward flow, the end AB output voltage U0=U；
2), turn off Q11 and Q24, electric current keep forward flow, flow through C1, C11, Q12, Lr, Cr, transformer T, Q23,
C24, C2, capacitor C11 and C24 charging, C11 and C24 voltage rise；
3), when capacitor C11 and C24 voltage is equal to U/2, the upper voltage of Q13, Q22 is 0, opens Q13, Q22 at this time, is realized
The no-voltage of Q13 and Q22 is open-minded, and electric current flows through D1, Q12, Lr, Cr, transformer T, Q23, D4；
4) Q12, Q23, are turned off, electric current flows through C14, Q13, Lr, Cr, transformer T, Q22, C21, C1, C2, capacitor C14 and
C21 electric discharge；
5), when voltage is equal to 0 on C14 and C21, Q14, Q21 are opened；Electric current flow through C1, Q21, Q22, transformer T,
Cr, Lr, Q13, Q14, C2, reverse direction current flow, the end AB output voltage U0=-U.
The utility model proposes three-level LLC resonance inverter output voltage can be ± U/2 and ± U, traditional LLC
Controlled resonant converter output voltage be ± U, the utility model proposes three-level LLC resonance inverter output voltage range be tradition
Twice of the output voltage of LLC circuit can meet high pressure and low pressure output simultaneously, and each switching device can realize zero electricity
It presses off logical, does not increase the cost and loss of system, meet voltage range and export wider occasion.
The above is only the preferred embodiment of the utility model, it is noted that for the common skill of the art
For art personnel, without deviating from the technical principle of the utility model, several improvement and deformations can also be made, these change
It also should be regarded as the protection scope of the utility model into deformation.
Claims (5)
1. a kind of three-level LLC resonance inverter of wide-range voltage output, characterized in that including the direct current being sequentially connected electrically
Appearance, the first bridge arm, the second bridge arm, resonance circuit, rectifier bridge and load；
The DC capacitor includes the first DC capacitor C1 and the second DC capacitor C2, and the first DC capacitor C1 cathode and second is directly
The anode that galvanic electricity is held is connected；
First bridge arm includes the first MOSFET element Q11, the second MOSFET element Q12, third MOSFET element Q13, the
Four MOSFET element Q14, third capacitor C11, the 4th capacitor C14, first diode D1 and the second diode D2；First MOSFET
The drain electrode of the source electrode of device Q11 and the second MOSFET element Q12 are connected, the source electrode and third of the second MOSFET element Q12
The drain electrode of MOSFET element Q13 is connected, and the drain electrode of the source electrode and the 4th MOSFET element Q14 of third MOSFET element Q13 is connected；
Third capacitor C11 and the first MOSFET element Q11 are in parallel, and the 4th capacitor C14 and the 4th MOSFET element Q14 are in parallel；One or two
The cathode of the anode of pole pipe D1 and the second diode D2 are connected, the cathode of first diode D1 and the first MOSFET element Q11's
Source electrode is connected, and the drain electrode of the anode and the 4th MOSFET element Q14 of the second diode D2 is connected；
Second bridge arm includes the 5th MOSFET element Q21, the 6th MOSFET element Q22, the 7th MOSFET element Q23, the
Eight MOSFET element Q24, the 5th capacitor C21, the 6th capacitor C24, third diode D3 and the 4th diode D4；5th MOSFET
The drain electrode of the source electrode of device Q21 and the 6th MOSFET element Q22 are connected, the source electrode and the 7th of the 6th MOSFET element Q22
The drain electrode of MOSFET element Q23 is connected, and the drain electrode of the source electrode and the 8th MOSFET element Q24 of the 7th MOSFET element Q23 is connected；
5th capacitor C21 and the 5th MOSFET element Q21 are in parallel, and the 6th capacitor C24 and the 8th MOSFET element Q24 are in parallel；Three or two
The cathode of the anode of pole pipe D3 and the 4th diode D4 are connected, the cathode of third diode D3 and the 5th MOSFET element Q21's
Source electrode is connected, and the drain electrode of the anode and the 8th MOSFET element Q24 of the 4th diode D4 is connected；
The both ends at the both ends of the DC capacitor, the both ends of the first bridge arm and the second bridge arm are respectively connected with, and the first of the first bridge arm
The anode of diode D1 is connected with the cathode of the first capacitor C1 of DC capacitor 1, the anode of the first diode D1 of the first bridge arm
It is connected with the anode of the third diode D3 of the second bridge arm.
2. a kind of three-level LLC resonance inverter of wide-range voltage output according to claim 1, characterized in that institute
The capacitance for stating third capacitor C11 and the 4th capacitor C14 is respectively greater than the first MOSFET element Q11 and the 4th MOSFET element
The junction capacity of Q13.
3. a kind of three-level LLC resonance inverter of wide-range voltage output according to claim 1, characterized in that institute
The capacitance for stating the 5th capacitor C21 and the 6th capacitor C24 is respectively greater than the 5th MOSFET element Q21 and the 8th MOSFET element
The junction capacity of Q24.
4. a kind of three-level LLC resonance inverter of wide-range voltage output according to claim 1, characterized in that institute
The source electrode of the second MOSFET element Q12 of the first bridge arm is stated as output terminals A, the 6th MOSFET element Q22 of the second bridge bridge arm
Source electrode as output end B, AB output end output voltage is U0。
5. a kind of three-level LLC resonance inverter of wide-range voltage output according to claim 4, characterized in that institute
Stating resonance circuit includes resonant capacitance Cr, resonant inductance Lr, transformer T, and output terminals A connects one end of resonant inductance Lr, resonance electricity
Feel another termination resonant capacitance Cr of Lr, the primary side of another termination transformer T of resonant capacitance Cr, it is former that output end B meets transformer T
The other end on side；Secondary side, rectifier bridge and the load of the transformer T is sequentially connected electrically.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820331095.9U CN208337412U (en) | 2018-03-09 | 2018-03-09 | A kind of three-level LLC resonance inverter of wide-range voltage output |
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| CN201820331095.9U CN208337412U (en) | 2018-03-09 | 2018-03-09 | A kind of three-level LLC resonance inverter of wide-range voltage output |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108429465A (en) * | 2018-03-09 | 2018-08-21 | 江苏万帮德和新能源科技股份有限公司 | A kind of three-level LLC resonance inverter of wide-range voltage output |
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2018
- 2018-03-09 CN CN201820331095.9U patent/CN208337412U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108429465A (en) * | 2018-03-09 | 2018-08-21 | 江苏万帮德和新能源科技股份有限公司 | A kind of three-level LLC resonance inverter of wide-range voltage output |
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Address after: 213100 No. 39 Longhui Road, Wujin High-tech Zone, Changzhou City, Jiangsu Province Patentee after: Wanbang Digital Energy Co., Ltd Address before: 213100 No. 39 Longhui Road, Wujin High-tech Zone, Changzhou City, Jiangsu Province Patentee before: JIANGSU WANBANG DEHE NEW ENERGY TECHNOLOGY Co.,Ltd. |
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