CN103560657A - All-digital multiphase isolation bridge DC-DC converter - Google Patents
All-digital multiphase isolation bridge DC-DC converter Download PDFInfo
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- CN103560657A CN103560657A CN201310364435.XA CN201310364435A CN103560657A CN 103560657 A CN103560657 A CN 103560657A CN 201310364435 A CN201310364435 A CN 201310364435A CN 103560657 A CN103560657 A CN 103560657A
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Abstract
The invention discloses an all-digital multiphase isolation bridge DC-DC converter, relating to the technical field of multiphase bridge DC to DC conversion. The positive electrode of a first capacitor C1 is connected with the collector of a first power tube Q1, the collector of a third power tube Q3 and the collector of a fifth power tubeQ5. The negative electrode of the first capacitor C1 is respectively connected with the positive electrode of a second capacitor C2, the pin 3 of a first transformer T1, the pin 3 of a second transformer T2 and the pin 3 of a third transformer T3. The negative electrode of the second capacitor C2 is connected with the emitter of a second power tube Q2, the emitter of a fourth power tube Q4 and the emitter of a sixth power tube Q6. The collector of the second power tube Q2 is connected with the emitter of the first power tube Q1 and the pin 1 of the third transformer T3. According to the all-digital multiphase isolation bridge DC-DC converter, the output of filtering is simple, and a small current ripple can be obtained even without filtering.
Description
Technical field
What the present invention relates to is heterogeneous bridge-type DC-DC converter technique field, the heterogeneous isolation bridge-type of full digital DC-DC converter.
Background technology
Now the high power D C-DC converter of use is to adopt single-phase bridge conversion, and when power is large, especially during the large electric current of output LOW voltage, the rectification of output is just difficult to ensure card voltage ripple and output current ripple, and namely filtering is difficult to do.The output current of several kilo-amperes, filter inductance and capacitance and volume are all very large, to such an extent as to are difficult to produce.
Summary of the invention
For the deficiency existing in prior art, the present invention seeks to be to provide the heterogeneous isolation bridge-type of a kind of full digital DC-DC converter, can make output filtering become very simple, even without filtering, also can obtain less current ripples.
To achieve these goals, the present invention realizes by the following technical solutions: the heterogeneous isolation bridge-type of full digital DC-DC converter, comprise the first capacitor C1, the second capacitor C2, the first power tube Q1-the 6th power tube Q6, the first inductance L 1-the 3rd inductance L 3, the first synchronous rectificating device A1-the 3rd synchronous rectificating device A3, the first capacitor C1 positive pole and the first power tube Q1 collector electrode, the 3rd power tube Q3 collector electrode is connected with the 5th power tube Q5 collector electrode, the first capacitor C1 negative pole is anodal with the second capacitor C2 respectively, 3 pin of the first transformer T1, 3 pin of the second transformer T2, 3 pin of the 3rd transformer T3 are connected, the second capacitor C2 negative pole and the second power tube Q2 emitter, the 4th power tube Q4 emitter, the 6th power tube Q6 emitter is connected, the second power tube Q2 collector electrode and the first power tube Q1 emitter, 1 pin of the 3rd transformer T3 is connected, the 4th power tube Q4 collector electrode and the 3rd power tube Q3 emitter, 1 pin of the second transformer T2 is connected, the 6th power tube Q6 collector electrode and the 5th power tube Q5 emitter, 1 pin of the first transformer T1 is connected, 2 pin of the first transformer T1 are connected with 3 pin with 1 pin of the first synchronous rectificating device A1 respectively with 4 pin, 2 pin of the second transformer T2 are connected with 3 pin with 1 pin of the second synchronous rectificating device A2 respectively with 4 pin, the 3rd transformer T3 2 pin be connected with 3 pin with 1 pin of the 3rd synchronous rectificating device A3 respectively with 4 pin, 2 pin of the first synchronous rectificating device A1 are connected with first inductance L 1 one end, 2 pin of the second synchronous rectificating device A2 are connected with second inductance L 2 one end, the 3rd synchronous rectificating device A3 is connected with the 3rd inductance L 3 one end, 4 pin of the first synchronous rectificating device A1, 4 pin of the second synchronous rectificating device A2 are all connected with power cathode with 4 pin of the 3rd synchronous rectificating device A3, first inductance L 1 other end, second inductance L 2 other ends are all connected with positive source with the 3rd inductance L 3 other ends.
The present invention can make output filtering become very simple, even without filtering, also can obtain less current ripples.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, describe the present invention in detail;
Fig. 1 is structural representation of the present invention (only having drawn 3 phases in figure);
Fig. 2 is control logic figure of the present invention (only having drawn 3 phases in figure);
Fig. 3 is power tube driving pulse figure of the present invention (only having drawn 3 phases in figure);
Fig. 4 be of the present invention after multichannel doubly flows rectification resultant current oscillogram (only having drawn 3 phases in figure);
Fig. 5 is voltage-regulation schematic diagram of the present invention.
Embodiment
For technological means, creation characteristic that the present invention is realized, reach object and effect is easy to understand, below in conjunction with embodiment, further set forth the present invention.
With reference to Fig. 1-5, this embodiment is by the following technical solutions: the heterogeneous isolation bridge-type of full digital DC-DC converter, comprise the first capacitor C1, the second capacitor C2, the first power tube Q1-the 6th power tube Q6, the first inductance L 1-the 3rd inductance L 3, the first synchronous rectificating device A1-the 3rd synchronous rectificating device A3, the first capacitor C1 positive pole and the first power tube Q1 collector electrode, the 3rd power tube Q3 collector electrode is connected with the 5th power tube Q5 collector electrode, the first capacitor C1 negative pole is anodal with the second capacitor C2 respectively, 3 pin of the first transformer T1, 3 pin of the second transformer T2, 3 pin of the 3rd transformer T3 are connected, the second capacitor C2 negative pole and the second power tube Q2 emitter, the 4th power tube Q4 emitter, the 6th power tube Q6 emitter is connected, the second power tube Q2 collector electrode and the first power tube Q1 emitter, 1 pin of the 3rd transformer T3 is connected, the 4th power tube Q4 collector electrode and the 3rd power tube Q3 emitter, 1 pin of the second transformer T2 is connected, the 6th power tube Q6 collector electrode and the 5th power tube Q5 emitter, 1 pin of the first transformer T1 is connected, 2 pin of the first transformer T1 are connected with 3 pin with 1 pin of the first synchronous rectificating device A1 respectively with 4 pin, 2 pin of the second transformer T2 are connected with 3 pin with 1 pin of the second synchronous rectificating device A2 respectively with 4 pin, the 3rd transformer T3 2 pin be connected with 3 pin with 1 pin of the 3rd synchronous rectificating device A3 respectively with 4 pin, 2 pin of the first synchronous rectificating device A1 are connected with first inductance L 1 one end, 2 pin of the second synchronous rectificating device A2 are connected with second inductance L 2 one end, the 3rd synchronous rectificating device A3 is connected with the 3rd inductance L 3 one end, 4 pin of the first synchronous rectificating device A1, 4 pin of the second synchronous rectificating device A2 are all connected with power cathode with 4 pin of the 3rd synchronous rectificating device A3, first inductance L 1 other end, second inductance L 2 other ends are all connected with positive source with the 3rd inductance L 3 other ends.
This embodiment is coordinated between the signal of FPGA generation multi-way control signals ，Mei road and is differed 360/n by single-chip microcomputer or dsp, and n is the heterogeneous number of phases.As 3 phasing commutators in Fig. 1,1 is 0 degree mutually, and 2 is 120 degree mutually, and 3 is 240 degree mutually.Three signals produce San Zu six road pwm signals by three synchro timers, control respectively Q1-Q6.Every road drives the phase place of signal to be determined by the different timing initial value of a plurality of synchro timers.
In Fig. 2, Tim1, Tim2, Tim3, Tim4 is four synchronously and independently timers.Tim4 is phase shift timer, and count mode is for adding counting, and maximum is 22400(count frequency=168MHz, pwm modulating frequency 15KHz, 360 degree phase shifts).Tim1, Tim2, the timer of Tim3 Wei San road plus-minus counting pattern, maximum count value is the phase shift of 11200(180 degree).
When timer starts, 2 comparand registers for Tim4, register 1 value is 7467, register 2 values are that 14933. Tim1 and Tim4 start simultaneously and there is no phase shift (0 degree), value=7467 of comparand register 1 o'clock, set to 0 the count value of Tim2, and the count value of Tim2 and Tim1 just differ from 120 degree like this.Value=14933 o'clock of same comparand register 2, set to 0 the count value of Tim3, and the count value of Tim3 and Tim1 just differ from 240 degree like this.So just obtained three triangular waves that differ 120 degree, with these three triangular waves, just can modulate three-phase PWM and drive signal.Same method, can obtain heterogeneous PWM and drive signal.For three phase inversion, because threephase load is symmetrical, an available three-phase transformer.For heterogeneous conversion, can only use a plurality of single-phase transformers.
Heterogeneous conversion, the number of phases adopts three multiple.Making converting network is symmetrical networking, in conversion process without zero sequence and neutral harmonic current.Heterogeneous conversion just, for symmetrical network conversion, does not need to consider heterogeneous current-sharing.Because output adopts synchronous rectification, each mutually between without circulation.As three phase inversion, after rectification, form 6 pulsating voltages, so electric current, voltage ripple has just dropped to a lot, if require less electric current and voltage ripple can increase the converter number of phases, or improves switching frequency, adds the filter that a less inductance and electric capacity form.In Fig. 3, be the pulsation of electric current, mains ripple is less.
The control principle of the multi-phase converter of this embodiment is as Fig. 5: the difference of exporting given voltage (reference voltage) and actual measurement output voltage (mean value) regulates through PI, controls duty ratio that each drives mutually, is output voltage stabilization.
This embodiment can make output filtering become very simple, even without filtering, also can obtain less current ripples.
More than show and described basic principle of the present invention and principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; that in above-described embodiment and specification, describes just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (1)
1. the heterogeneous isolation bridge-type of full digital DC-DC converter, it is characterized in that, comprise the first capacitor (C1), the second capacitor (C2), the first power tube (Q1)-the 6th power tube (Q6), the first inductance (L1)-the 3rd inductance (L3), the first synchronous rectificating device (A1)-the 3rd synchronous rectificating device (A3), the first capacitor (C1) positive pole and first power tube (Q1) collector electrode, the 3rd power tube (Q3) collector electrode is connected with the 5th power tube (Q5) collector electrode, the first capacitor (C1) negative pole respectively with the second capacitor (C2) positive pole, 3 pin of the first transformer (T1), 3 pin of the second transformer (T2), 3 pin of the 3rd transformer (T3) are connected, the second capacitor (C2) negative pole and the second power tube (Q2) emitter, the 4th power tube (Q4) emitter, the 6th power tube (Q6) emitter is connected, the second power tube (Q2) collector electrode and the first power tube (Q1) emitter, 1 pin of the 3rd transformer (T3) is connected, the 4th power tube (Q4) collector electrode and the 3rd power tube (Q3) emitter, 1 pin of the second transformer (T2) is connected, the 6th power tube (Q6) collector electrode and the 5th power tube (Q5) emitter, 1 pin of the first transformer (T1) is connected, 2 pin of the first transformer (T1) are connected with 3 pin with 1 pin of the first synchronous rectificating device (A1) respectively with 4 pin, 2 pin of the second transformer (T2) are connected with 3 pin with 1 pin of the second synchronous rectificating device (A2) respectively with 4 pin, the 3rd transformer (T3) 2 pin be connected with 3 pin with 1 pin of the 3rd synchronous rectificating device (A3) respectively with 4 pin, 2 pin of the first synchronous rectificating device (A1) are connected with the first inductance (L1) one end, 2 pin of the second synchronous rectificating device (A2) are connected with the second inductance (L2) one end, the 3rd synchronous rectificating device (A3) is connected with the 3rd inductance (L3) one end, 4 pin of the first synchronous rectificating device (A1), 4 pin of the second synchronous rectificating device (A2) are all connected with power cathode with 4 pin of the 3rd synchronous rectificating device (A3), the first inductance (L1) other end, the second inductance (L2) other end is all connected with positive source with the 3rd inductance (L3) other end.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310364435.XA CN103560657A (en) | 2013-11-26 | 2013-11-26 | All-digital multiphase isolation bridge DC-DC converter |
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| CN201310364435.XA CN103560657A (en) | 2013-11-26 | 2013-11-26 | All-digital multiphase isolation bridge DC-DC converter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111376791A (en) * | 2018-12-29 | 2020-07-07 | 比亚迪股份有限公司 | Vehicle, vehicle-mounted charger and control method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101496267A (en) * | 2005-10-14 | 2009-07-29 | 雅达电子国际有限公司 | Multiphase DC to DC converter |
| US20120275197A1 (en) * | 2009-02-27 | 2012-11-01 | Delta Electronics (Shanghai) Co., Ltd. | Layouts of multiple transformers and multiple rectifiers of interleaving converter |
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- 2013-11-26 CN CN201310364435.XA patent/CN103560657A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101496267A (en) * | 2005-10-14 | 2009-07-29 | 雅达电子国际有限公司 | Multiphase DC to DC converter |
| US20120275197A1 (en) * | 2009-02-27 | 2012-11-01 | Delta Electronics (Shanghai) Co., Ltd. | Layouts of multiple transformers and multiple rectifiers of interleaving converter |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111376791A (en) * | 2018-12-29 | 2020-07-07 | 比亚迪股份有限公司 | Vehicle, vehicle-mounted charger and control method thereof |
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