CN201839207U - Preceding-stage inversion high-frequency chain isolating type DC-DC converter based on double-Boost circuit - Google Patents
Preceding-stage inversion high-frequency chain isolating type DC-DC converter based on double-Boost circuit Download PDFInfo
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- CN201839207U CN201839207U CN2010202556052U CN201020255605U CN201839207U CN 201839207 U CN201839207 U CN 201839207U CN 2010202556052 U CN2010202556052 U CN 2010202556052U CN 201020255605 U CN201020255605 U CN 201020255605U CN 201839207 U CN201839207 U CN 201839207U
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Abstract
The utility model discloses a preceding-stage inversion high-frequency chain isolating type DC-DC converter based on a double-Boost circuit, belonging to the field of power electronic converters. The circuit topological structure provided by the utility model is as follows: the preceding-stage inversion high-frequency chain isolating type DC-DC converter comprises a double-Boost circuit realizing preceding-stage inversion function, a high-frequency transformer realizing the isolation of a preceding-stage circuit from a backward-stage circuit, and the function of voltage fluctuation and conversion, and a rectifying circuit realizing rectifying function. In the utility model, a commonly-used bridge and full-wave uncontrollable rectifying circuits are changed into a controllable rectifying circuit by the rectifying circuit, in this way, a two-way switch is further introduced, and the rectifying circuit based on a one-way power switch is changed into a bridge type and full-wave controllable rectifying circuit based on a two-way switch. After the rectifying circuit of the converter is changed into the controllable rectifying circuit, the preceding stage and the backward stage of the converter can be separately controlled, and after the two-way switch is introduced, the whole circuit can have larger control freedom, and the energy can flow bidirectionally.
Description
Technical field
The present invention relates to two Boost circuit, bridge rectifier and full-wave rectifying circuit, belong to direct current energy conversion field.
Technical background
1 pair of Boost circuit
As shown in Figure 1, two Boost circuit are made up of two full control switches and two energy storage inductors, can realize the output of boosting of Boost circuit in its any switch periods by certain control method, compare with the full bridge inverter of common realization high frequency conversion, be characterized in: the two Boost inverter circuits of prime have not only reduced the number of prime inverter circuit power switch, reduced the switching loss of circuit, improved the efficient of integrated circuit, and because this circuit has the characteristic of boosting, so can dwindle the no-load voltage ratio of high frequency transformer, and then reduced the volume and weight of transformer, reduce of the influence of transformer distributed constant to integrated circuit.
2 high frequency chain technology and high frequency transformers
Because Industrial Frequency Transformer has wide range of applications, good reliability, correlation technique maturation, so isolated converter all is to use Industrial Frequency Transformer to adjust voltage ratio and carries out the electrical isolation of front stage circuits and late-class circuit generally speaking.But the employing Industrial Frequency Transformer can make the volume of entire system big, Heavy Weight; System's output filter is bulky, heaviness; Industrial Frequency Transformer and output inductor can produce noise; For the fluctuation of input voltage or load, the dynamic response characteristic of system is poor.In order to overcome the above shortcoming of Industrial Frequency Transformer, high frequency chain technology is arisen at the historic moment, it is the Industrial Frequency Transformer that utilizes in the inversion of high frequency transformer replacement low frequency, when realizing adjusting front stage circuits and late-class circuit voltage ratio and electrical isolation function, effectively reduce the volume and weight of transformer, and then reduced the volume and weight of whole system.
3 bidirectional switchs and rectification circuit
Bidirectional switch is meant when conducting can flow through bidirectional current, can block the device that bi-directional voltage has self-switching-off capability during shutoff, and four-quadrant switches is otherwise known as.The power device that does not have this type in the market is so bidirectional switch is normally combined by single-way switch.IGBT combined bidirectional switch at present commonly used mainly contains four kinds of forms, bridge-type two-way switch promptly shown in Figure 2, parallel connection type bidirectional switch shown in Figure 3, common emitter differential concatenation combined bidirectional switch shown in Figure 4 and common collector differential concatenation combined bidirectional switch shown in Figure 5.Modern rectification circuit commonly used can be divided into uncontrollable rectification circuit, half control rectification circuit and all controlled rectifier circuit according to the device of forming.The device of forming uncontrollable rectification circuit is for controlling the type device, and the device of forming the half control rectification circuit is that the full-control type device is not controlled device to form the device of all controlled rectifier circuit all be the full-control type device.
Summary of the invention
Circuit structure of the present invention as shown in Figure 6, two Boost circuit are adopted in the prime inversion, two Boost DC-DC translation circuits of the crisscross parallel type that its similar is common, difference is that rectifier diode has wherein been saved in the output of two Boost circuit, and the direct current input is transformed to high-frequency ac output.By controlling the alternation of two Boost converters, can realize the energy conversion of DC-HFAC.The output voltage of front stage circuits is through the conversion and the input of isolation back as late-class circuit of high frequency transformer, and rectification circuit can be formed different isolated form DC-DC converters by the rectification circuit of different structure.
The present invention transforms the rectification circuit topological structure of late-class circuit, and a kind of is bridge rectifier, and a kind of is full-wave rectifying circuit.It is the bridge-type all controlled rectifier circuit that bridge rectifier has at the late-class circuit shown in Figure 8 that forms on uncontrollable bridge rectifier basis shown in Figure 7, the unidirectional power switch is replaced with bidirectional switch, then can forming as shown in Figure 9, rectification circuit is the isolated form DC-DC converter of unidirectional matrix form rectifier, only having provided bidirectional switch in accompanying drawing of the present invention is the DC-DC converter circuit topology of bridge-type two-way switch, and the bridge-type two-way switch is replaced to the parallel connection type bidirectional switch, altogether emitting stage differential concatenation combined bidirectional switch and common collector differential concatenation combined bidirectional switch also can form with spline structure based on two Boost prime inversion isolated form DC-DC converters.In like manner, late-class circuit be full-wave rectifying circuit the switching tube that equally can be in Figure 10 forms late-class circuit among Figure 11 on the circuit base based on two Boost prime inversion isolated form DC-DC converters for full control device based on late-class circuit switching tube among two Boost prime inversion isolated form DC-DC converters and Figure 12 be the bridge-type two-way switch based on two Boost prime inversion isolated form DC-DC converters.With the bridge-type two-way switch among Figure 12 replace to the parallel connection type bidirectional switch, altogether emitting stage differential concatenation combined bidirectional switch and common collector differential concatenation combined bidirectional switch also can form with spline structure based on two Boost prime inversion isolated form DC-DC converters.
No matter the late-class circuit version based on two Boost prime inversion isolated form DC-DC converters is bridge rectifier or full-wave rectification, as long as the rectification circuit switching tube is a diode, then rectification circuit is uncontrollable, has only by the change in duty cycle of switching tube drive signal of control inverter circuit and regulates VD.If rectification circuit is become controlled rectification circuit, then can be simultaneously or the duty of controlling the drive signal of the switching tube in inverter circuit or the rectification circuit respectively recently regulate VD, and then can improve control precision to output dc voltage.After single-way switch in the rectification circuit replaced with bidirectional switch, late-class circuit became the matrix form rectification circuit, and this rectification circuit has better improved the control degrees of freedom of integrated circuit, and whole converter has realized the two-way flow of energy.
Description of drawings
Fig. 1 is two Boost inverter circuits
Fig. 2 is the bridge-type two-way switch
Fig. 3 is the parallel connection type bidirectional switch
Fig. 4 opens for common emitter differential concatenation combined bidirectional
Fig. 5 is a common collector differential concatenation combined bidirectional switch
Fig. 6 is based on two Boost prime inversion isolated form DC-DC converter circuit structure charts
Fig. 7 is the isolated form DC-DC converter that bridge-type is not controlled rectification for rectification circuit
Fig. 8 is the isolated form DC-DC converter of the bridge-type controlled rectification of single-way switch for rectification circuit
Fig. 9 is the bridge-type controlled rectification isolated form DC-DC converter of bidirectional switch for rectification circuit
Figure 10 is that full-wave type is not controlled rectification DC-DC converter for rectification circuit
Figure 11 is the DC-DC converter of full-wave type single-way switch controlled rectification for rectification circuit
Figure 12 is the DC-DC converter of full-wave type bidirectional switch controlled rectification for rectification circuit
The trigger impulse of Figure 13 prime inverter circuit switching tube M1 and M2
Embodiment
Fig. 1 is the circuit structure of two Boost circuit, wherein the drive signal of power switch pipe M1 and M2 as shown in figure 13, t1 constantly, M2 disconnects, the M1 conducting, magnetic energy is transformed to electric energy by the former limit of transformer in the inductance L 2, the transformer primary current increases; The t2 moment, the M2 conducting, M1 and M2 conducting simultaneously, inductance L 2 energy storage, and the converter primary current is zero because the M2 conducting reduces gradually until current value; In the t3 moment, M1 turn-offs, and inductance L 1 stored energy passes to transformer, and former limit of transformer and secondary current rise; The t4 moment, the M1 conducting, M2 keeps conducting, inductance L 1 energy storage, inductance L 2 and M2 and electric power loop have electric current, the L2 energy storage, the transformer primary current is because the M1 conducting begins to be reduced to oppositely and gradually zero.
Rectification circuit with the output of two Boost circuit alternating voltage carry out rectification, through output dc voltage after the filtering.When a level rectification circuit in back is bridge rectifier, when prime inverter circuit output voltage waveforms is timing, the S1 and the S4 conducting of level rectification circuit after the bridge-type, when prime inverter circuit output voltage waveforms when negative, the S2 and the S3 conducting of level rectification circuit after the bridge-type.When rectification circuit is full-wave rectifying circuit, when prime inverter circuit output voltage waveforms is timing, full-wave rectifying circuit S1 conducting, when prime inverter circuit output voltage waveforms when negative, full-wave rectifying circuit S2 conducting.
Claims (3)
1. one kind based on two Boost circuit prime inversion high frequency chain isolated form DC-DC converters, comprise two Boost circuit, high frequency transformer and rectification circuit, it is characterized in that: front stage circuits adopts two Boost circuit, and late-class circuit adopts controlled bridge rectifier circuit or all-wave controlled rectification circuit.
2. a kind of based on two Boost circuit prime inversion high frequency chain isolated form DC-DC converters according to described in the claim 1 is characterized in that: the power switch of bridge rectifier can be unidirectional power switch, bridge-type two-way switch, parallel connection type bidirectional switch, emitting stage differential concatenation combined bidirectional switch, common collector differential concatenation combined bidirectional switch altogether.
3. a kind of based on two Boost circuit prime inversion high frequency chain isolated form DC-DC converters according to described in the claim 1 is characterized in that: the power switch of full-wave rectifying circuit can be unidirectional power switch, bridge-type two-way switch, parallel connection type bidirectional switch, emitting stage differential concatenation combined bidirectional switch, common collector differential concatenation combined bidirectional switch altogether.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202556052U CN201839207U (en) | 2010-07-08 | 2010-07-08 | Preceding-stage inversion high-frequency chain isolating type DC-DC converter based on double-Boost circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202556052U CN201839207U (en) | 2010-07-08 | 2010-07-08 | Preceding-stage inversion high-frequency chain isolating type DC-DC converter based on double-Boost circuit |
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| Publication Number | Publication Date |
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| CN201839207U true CN201839207U (en) | 2011-05-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010202556052U Expired - Fee Related CN201839207U (en) | 2010-07-08 | 2010-07-08 | Preceding-stage inversion high-frequency chain isolating type DC-DC converter based on double-Boost circuit |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103023366A (en) * | 2012-11-19 | 2013-04-03 | 南京理工大学 | Half-bridge five-electrical-level inverter and high-frequency insulation-type half-bridge five-electrical-level inverter |
| CN104333228A (en) * | 2014-10-29 | 2015-02-04 | 国家电网公司 | High-frequency bidirectional isolation system |
| CN104410278A (en) * | 2014-12-26 | 2015-03-11 | 阳光电源股份有限公司 | DCDC converter |
| CN110022069A (en) * | 2019-02-26 | 2019-07-16 | 深圳供电局有限公司 | High-frequency-chain bidirectional direct-current transformer connected with bidirectional switch and control method thereof |
-
2010
- 2010-07-08 CN CN2010202556052U patent/CN201839207U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103023366A (en) * | 2012-11-19 | 2013-04-03 | 南京理工大学 | Half-bridge five-electrical-level inverter and high-frequency insulation-type half-bridge five-electrical-level inverter |
| CN104333228A (en) * | 2014-10-29 | 2015-02-04 | 国家电网公司 | High-frequency bidirectional isolation system |
| CN104333228B (en) * | 2014-10-29 | 2017-02-01 | 国家电网公司 | High-frequency bidirectional isolation system |
| CN104410278A (en) * | 2014-12-26 | 2015-03-11 | 阳光电源股份有限公司 | DCDC converter |
| CN110022069A (en) * | 2019-02-26 | 2019-07-16 | 深圳供电局有限公司 | High-frequency-chain bidirectional direct-current transformer connected with bidirectional switch and control method thereof |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110518 Termination date: 20120708 |