CN206620053U - A kind of super wide range output LLC translation circuits, electric automobile battery charger - Google Patents
A kind of super wide range output LLC translation circuits, electric automobile battery charger Download PDFInfo
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- CN206620053U CN206620053U CN201621188622.2U CN201621188622U CN206620053U CN 206620053 U CN206620053 U CN 206620053U CN 201621188622 U CN201621188622 U CN 201621188622U CN 206620053 U CN206620053 U CN 206620053U
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- translation circuits
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Abstract
The application is related to a kind of super wide range output LLC translation circuits, LLC electric automobile battery chargers, including inverter circuit, resonance circuit, transformer, output circuit, the inverter circuit, resonance circuit, transformer, output circuit connect to form LLC translation circuits 1, multichannel LLC translation circuits 1 are subjected to connection in series-parallel, form n group circuits, the n groups circuit bumpless transfer, realizes 2nChange in gain again, n is more than or equal to 1, it is possible to achieve output area flexibly changes, and is always worked using LLC resonance circuits near resonance point, and then reduce circuit loss.
Description
Technical field
The application is related to a kind of LLC translation circuits, electric automobile battery charger, more particularly to a kind of super wide range output LLC
Translation circuit, electric automobile battery charger.
Background technology
At present, for high-power chargers such as electric automobile battery chargers, because battery size is numerous, charger will be realized pair
The charging of various different model batteries, it needs wider output voltage range（High pressure is exported with exporting low pressure ratio close to 4
Times）.
But traditional LLC topologys, when these wide range outputs are applied, due to its input and output transmission characteristic, are determined
It will realize that wider output voltage range is relatively difficult, and there is problems with：Circuit is in (BUCK areas) when low pressure is exported
Serious discontinuous mode, master power switch pipe be in hard off state, loss increase, and during depth B UCK area's underloadings power supply line
Ripple is larger, circuitry specifications is declined to a great extent；Circuit is in BOOST areas during High voltage output, and resonance current can also rise, machine loss
Rise；In order to meet compared with wide output voltage range, can design transfer curve is harder, or increase frequency change model
Enclose.The former can cause in-fighting to increase, and efficiency declines.The latter, increase frequency can increase loss and the stress of switching tube, have a strong impact on
Its reliability.If reduction frequency can increase the volume of magnetic device, cost increase, and be run in the opposite direction with high frequency miniaturization.
The content of the invention
To solve above-mentioned technical problem：The application proposes a kind of super wide range output LLC translation circuits, including inversion electricity
Road, resonance circuit, transformer, output circuit, the inverter circuit, resonance circuit, transformer, output circuit connect to form LLC
Translation circuit 1, connection in series-parallel is carried out by multichannel LLC translation circuits 1, forms n group circuits, and the n groups circuit bumpless transfer realizes 2n
Change in gain again, n is more than or equal to 1.
Described super wide range output LLC translation circuits, wherein, the inverter circuit includes tetra- switching tubes of Q1-Q4, institute
State Q1, Q2 and be connected into bridge arm 1, the Q3-Q4 is connected into bridge arm 2, and bridge arm 1 and bridge arm 2 are in parallel.
Described super wide range output LLC translation circuits, wherein, the inverter circuit includes full-bridge working condition or half-bridge
Working condition, is switched on or off Q3, and Q4 switching tubes realize full-bridge or the conversion of half-bridge working condition.
Described super wide range output LLC translation circuits, wherein, the equal reverse parallel connection one of tetra- switching tubes of Q1-Q4
Diode.
Described super wide range output LLC translation circuits, wherein, the multichannel LLC translation circuits 1 input parallel connection, output
Series connection.
Described super wide range output LLC translation circuits, wherein, the input of the multichannel LLC translation circuits 1 it is just defeated
Enter the positive pole that end is all connected with direct current input, negative output terminal is all connected with the negative pole of direct current input, the multichannel LLC translation circuits 1
The positive output end of output end connects the negative output terminal of adjacent translation circuit.
Described super wide range output LLC translation circuits, wherein, in addition to the electricity in parallel with inverter circuit, output circuit
Hold, the resonance circuit is in series by resonant capacitance, resonant inductance.
Described super wide range output LLC electric automobile battery chargers, wherein, including super wide range output described above
LLC translation circuits.
The problem of the application exists when successfully solving the low pressure stage that former LLC translation circuits are operated in its working range：
Circuit is in (BUCK areas) serious discontinuous mode when low pressure is exported, and master power switch pipe is in hard off state, and loss increases,
And during depth B UCK area's underloadings power supply ripple it is larger, circuitry specifications is declined to a great extent.Also the circuit in High voltage output is solved
In BOOST areas, resonance current can also rise, the problem of machine loss rises.
More importantly original LLC translation circuits, in order to meet compared with wide output voltage range, can design transfer curve
It is harder, or increase frequency range.The former can cause in-fighting to increase, and efficiency declines.The latter, increase frequency, which can increase, to be held
Loss and the stress of pipe are closed, reduction frequency can increase the volume of magnetic device, be run in the opposite direction with high frequency miniaturization.In ultra-wide model
Enclose to export in complete/semi-bridge alternation LLC circuits and obtained good solution.
Brief description of the drawings
Fig. 1 is conventional LLC translation circuits.
Fig. 2 is a kind of schematic circuit diagram of the application full-bridge working condition.
Fig. 3 is a kind of schematic circuit diagram of the application half-bridge working condition.
Fig. 4 is that the identical multichannel of the application carries out a kind of schematic circuit diagram of connection in series-parallel.
Embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings, it is necessary to it is pointed out here that, implement in detail below
Mode is served only for that the present invention is further detailed, it is impossible to be interpreted as limiting the scope of the invention, the field
Technical staff can make some nonessential modifications and adaptations to the application according to above-mentioned utility model content.
Fig. 1 is LLC circuit devcies in conventional LLC translation circuits, Fig. 1：After transformer, inductance and resonant capacitance are selected, its
Lp, Ls, Cr values determine, then other relevant parameters：Transformer turns ratio n（=Np/Ns）, LLC resonant frequency fr（）,
Lowest operating frequency fmin, maximum operating frequency fmax are equivalent to be determined, wherein, fmin<fr<fmax.
To ensure circuit in high pressure full load energy steady operation, resonant frequency fr is typically closer to the minimum work frequency of power supply
Rate fmin.For LLC circuit topologies, working frequency f is closer to resonant frequency fr, and the operating efficiency of power supply is higher.When LLC circuits
Into depressor area（BUCK）When, the working frequency f of power supply> fr；Now, output voltage is lower, and the working frequency f of circuit is got over
Greatly, its off-resonance frequency fr is also more, and the loss produced by the device such as transformer and inductance is bigger.
When being exported for low pressure, due to its input and output transmission characteristic, circuit is in order to maintain output voltage constant, in zero load
With on-off state is in the case of underloading.When output voltage is close to lower voltage limit, circuit can be in serious on-off state,
Now its output ripple is very big.When being subject to heavy duty, circuit can enter continuous mode, and now circuit is to approach peak frequency fmax works
Make, circuit loss is greatly increased.
Fig. 2 is full-bridge working condition, and Fig. 3 is half-bridge working condition, when full-bridge works, such as Fig. 2, four normal works of switching tube
Make.Assuming that transformer voltage ratio is 1, circuit is operated in resonance point, and voltage gain now is 1.When half-bridge works, such as Fig. 3, by Q3
Shut-off is set to, Q4 is set to opening state.Assuming that transformer voltage ratio is 1, circuit is operated in resonance point, voltage gain now
For 0.5.By being switched on or off Q3, Q4 switching tubes are that full-bridge/half-bridge conversion, i.e. gain can be achieved from 1 to 0.5 switching.When
We carry out input parallel connection, output series connection, such as Fig. 4, you can to realize 4 times of no-load voltage ratio using two-way identical.Assuming that needing at present
It is up to 750V to want output voltage, then has：
The module working condition of table 1 is compareed with voltage gain
As can be seen from the above table LLC circuits compared be easily reached output voltage be 120-750 super wide ranges output.
In the application, pass through the bumpless transfer of half-bridge/full-bridge of n group circuits, you can realize 2nChange in gain again, such as schemes
Shown in 2, the application is exemplified by two groups.And LLC circuits can work in compared with small frequency excursion, you can realize wider defeated
Go out voltage range.Therefore loss can be greatly reduced, while LLC circuits easily enter continuous mode, can significantly reduce its defeated
Go out ripple, lift properties of product.
SECO of the application by changing switching tube can produce a desired effect；Super wide range exports bridging entirely/half
Changing LLC can use LLC resonance circuits always to be worked near resonance point, and then reduce circuit loss.Successfully solve former LLC
The problem of existing during the low pressure stage that translation circuit is operated in its working range：Circuit is in (BUCK areas) seriously when low pressure is exported
Discontinuous mode, master power switch pipe be in hard off state, loss increase, and during depth B UCK area's underloadings power supply ripple compared with
Greatly, circuitry specifications are made to decline to a great extent.Also solve the circuit in High voltage output and be in BOOST areas, resonance current can also rise, whole
The problem of machine loss rises.
More importantly original LLC translation circuits, in order to meet compared with wide output voltage range, can design transfer curve
It is harder, or increase frequency range.The former can cause in-fighting to increase, and efficiency declines.The latter, increase frequency, which can increase, to be held
Loss and the stress of pipe are closed, reduction frequency can increase the volume of magnetic device, be run in the opposite direction with high frequency miniaturization.In ultra-wide model
Enclose to export in complete/semi-bridge alternation LLC circuits and obtained good solution.
Claims (7)
1. a kind of super wide range exports LLC translation circuits, including inverter circuit, resonance circuit, transformer, output circuit, it is special
Levy and be：The inverter circuit, resonance circuit, transformer, output circuit are connected to form LLC translation circuits 1, and multichannel LLC is become
The input side for changing circuit 1 is connected in parallel, and outlet side is connected in series, and forms n group circuits, and the n groups circuit bumpless transfer realizes 2n
Change in gain again, n is more than or equal to 1.
2. super wide range as claimed in claim 1 exports LLC translation circuits, it is characterised in that：The inverter circuit includes Q1-
Tetra- switching tubes of Q4, described Q1, Q2 are connected into bridge arm 1, and the Q3-Q4 is connected into bridge arm 2, and bridge arm 1 and bridge arm 2 are in parallel.
3. super wide range as claimed in claim 2 exports LLC translation circuits, it is characterised in that：The inverter circuit includes complete
Bridge working condition or half-bridge working condition, are switched on or off Q3, and Q4 switching tubes realize full-bridge or the conversion of half-bridge working condition.
4. super wide range as claimed in claim 2 exports LLC translation circuits, it is characterised in that：Described tetra- switching tubes of Q1-Q4
One diode of equal reverse parallel connection.
5. super wide range as claimed in claim 4 exports LLC translation circuits, it is characterised in that：The multichannel LLC translation circuits
The positive input terminal of 1 input is all connected with the positive pole of direct current input, and negative output terminal is all connected with the negative pole of direct current input, the multichannel
The positive output end of the output end of LLC translation circuits 1 connects the negative output terminal of adjacent translation circuit.
6. super wide range as claimed in claim 1 exports LLC translation circuits, it is characterised in that：Also include and inverter circuit, defeated
Go out the electric capacity of circuit in parallel, the resonance circuit is in series by resonant capacitance, resonant inductance.
7. a kind of super wide range exports LLC electric automobile battery chargers, it is characterised in that：Including such as any one of claim 1-6 institutes
The super wide range output LLC translation circuits stated.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621188622.2U CN206620053U (en) | 2016-10-28 | 2016-10-28 | A kind of super wide range output LLC translation circuits, electric automobile battery charger |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621188622.2U CN206620053U (en) | 2016-10-28 | 2016-10-28 | A kind of super wide range output LLC translation circuits, electric automobile battery charger |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108258910A (en) * | 2017-12-25 | 2018-07-06 | 浙江大学 | A kind of full-bridge LLC resonant transform circuits and its wide range output control method |
| CN110557026A (en) * | 2019-08-07 | 2019-12-10 | 苏州汇川联合动力系统有限公司 | High-voltage direct-current conversion circuit and vehicle-mounted charger |
| CN110719046A (en) * | 2019-09-27 | 2020-01-21 | 中南大学 | Control method for aging power supply device |
| CN111431413A (en) * | 2020-04-03 | 2020-07-17 | 深圳市科华恒盛科技有限公司 | LL C resonant circuit |
| CN113474984A (en) * | 2019-03-25 | 2021-10-01 | 西门子股份公司 | DC-DC converter |
| CN114208013A (en) * | 2020-06-29 | 2022-03-18 | 华为数字能源技术有限公司 | Resonant converter and voltage conversion method |
-
2016
- 2016-10-28 CN CN201621188622.2U patent/CN206620053U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108258910A (en) * | 2017-12-25 | 2018-07-06 | 浙江大学 | A kind of full-bridge LLC resonant transform circuits and its wide range output control method |
| CN113474984A (en) * | 2019-03-25 | 2021-10-01 | 西门子股份公司 | DC-DC converter |
| CN110557026A (en) * | 2019-08-07 | 2019-12-10 | 苏州汇川联合动力系统有限公司 | High-voltage direct-current conversion circuit and vehicle-mounted charger |
| CN110719046A (en) * | 2019-09-27 | 2020-01-21 | 中南大学 | Control method for aging power supply device |
| CN110719046B (en) * | 2019-09-27 | 2021-03-30 | 中南大学 | Control method for aging power supply device |
| CN111431413A (en) * | 2020-04-03 | 2020-07-17 | 深圳市科华恒盛科技有限公司 | LL C resonant circuit |
| CN114208013A (en) * | 2020-06-29 | 2022-03-18 | 华为数字能源技术有限公司 | Resonant converter and voltage conversion method |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
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| TR01 | Transfer of patent right |
Effective date of registration: 20220729 Address after: 242000 No. 208, Tongying East Road, Guangde Economic Development Zone, Xuancheng City, Anhui Province Patentee after: GOODWE POWER SUPPLY TECHNOLOGY (GUANGDE) Co.,Ltd. Address before: 518054 415, building 1, Xunmei science and Technology Plaza, Science Park, Yuehai street, Nanshan District, Shenzhen, Guangdong Province Patentee before: SHENZHEN LANGBIXING TECHNOLOGY Co.,Ltd. |
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