CN203827179U - Novel resonant converter - Google Patents
Novel resonant converter Download PDFInfo
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- CN203827179U CN203827179U CN201420165665.3U CN201420165665U CN203827179U CN 203827179 U CN203827179 U CN 203827179U CN 201420165665 U CN201420165665 U CN 201420165665U CN 203827179 U CN203827179 U CN 203827179U
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Abstract
The utility model provides a novel DC superposition pulse type resonant converter with easy realization in technology. The resonant converter comprises positive and negative voltage sources, a choke coil, a resonant unit, a resonant switch, a transformer, a magnetic bias circuit, a blocking unit, a filter unit and a direct current output unit. A transformer secondary winding first output end is connected to the blocking unit which is connected to a load. The first output end of the direct current output unit is connected to the filter unit which is connected to the load. Through the novel resonant converter, pulse voltage is added on the basis of a direct current power supply unit in the mode of resonant conversion, and the novel resonant converter has the advantages of high efficiency, simple structure, convenient control and low cost.
Description
technical field:
The utility model relates to field of power conversion, is specifically related to a kind of novel controlled resonant converter.
background technology:
Along with the development of power electronic technology, Switching Power Supply is all widely used in every profession and trade, a kind of as Switching Power Supply, and controlled resonant converter, due to its high efficiency, the advantage such as simple, is in the industry cycle widely applied.
At present all need to be in original direct current supply in a lot of application the power supply plan of superimposed pulse voltage again, such as electrostatic precipitation field etc.The utility model proposes a kind of new topological structure, the pulse voltage that superposes on the basis of exporting at DC power supply unit by the mode of resonant transformation, has the advantages such as efficiency is high, simple in structure, control is convenient, with low cost.
summary of the invention:
The purpose of this utility model is to provide a kind of novel DC pulse superposition type controlled resonant converter of easily realizing technically.
Concrete technical scheme of the present utility model is as follows:
A kind of controlled resonant converter, comprise former limit resonant element, transformer 10, biasing circuit and secondary output unit, described former limit resonant element comprises positive and negative voltage sources 1, choke 2, resonant element and resonant switch, and described positive and negative voltage sources 1 first output is connected with transformer primary side winding first input end a through the first choke 2, the first resonant element; Positive and negative voltage sources 1 second output is connected with transformer primary side winding the second input c through the second choke 3, the second resonant element; Positive and negative voltage sources 1 the 3rd output connects respectively the output of the first resonant switch, centre tap input b the ground connection of the input of the second resonant switch, transformer primary side winding; The input of the first resonant switch is connected between the first choke and the first resonant element, and the output of the second resonant switch is connected between the second choke 3 and the second resonant element.
Further design of the present utility model is:
Described secondary output unit comprises: every straight unit 11, filter unit 12, load 13 and direct current output unit 14, transformer secondary winding the first output is connected to every straight unit 11, every straight unit 11, be connected to load 13, direct current output unit the first output is connected to filter unit 12, filter unit 12 connects load 13, and transformer secondary winding the second output connects direct current output unit 14 second inputs and load 13 second inputs while ground connection.
Described the first resonant element adopts the first electric capacity; The second resonant element adopts the second electric capacity.
Described the first resonant element is formed by the first inductance and the first capacitances in series successively; The second resonant element is formed by the second inductance and the second capacitances in series successively.
Described the first resonant element is formed by the first capacitances in series and the first inductance successively; The second resonant element is in series by the second electric capacity and the second inductance.
This controlled resonant converter also comprises the first protected location and the second protected location; First protected location one end is connected between the first choke and the first resonant element, and the other end is connected with the 3rd output of positive and negative voltage sources; Second protected location one end is connected between the second choke and the second resonant element, and the other end is connected with the 3rd output of positive and negative voltage sources.
Former limit of the present utility model resonant element expands to two or more unit.
The first electric capacity and the second capacitor's capacity equate; The first inductance and the second inductance sense value equate.
Positive and negative voltage sources is industrial frequency rectifying power supply or ac voltage regulator or DC voltage regulator power supply or Switching Power Supply.
The first resonant switch and the second resonant switch adopt semiconductor switch, for example IGBT, IGCT, GTO; Described filter unit is high voltage induction or diode.
the beneficial effect that the utility model is compared with the prior art is:
The utility model is divided into two the voltage on resonant switch on the one hand, has effectively reduced the voltage stress of resonant switch, can adopt the switching device of low voltage stress, thereby effectively reduce the application cost of system;
System full symmetric structure on the other hand, can effectively reduce differential mode noise etc., in addition, by transformer primary side winding centre tap ground connection, can effectively improve resonance current waveform, and can the impact of noise decrease electric current on other parts of system, also can reduce by increasing a plurality of former limits resonant circuit the current stress of resonant switch in addition, increase pulse output power;
On the other hand, in the utility model because resonant switch is not simple series connection, its tie point is connected to the second input of transformer, so drive when asynchronous when resonant switch, there will not be single resonant switch owing to bearing the excessive situation about damaging of voltage stress.
accompanying drawing explanation:
Fig. 1 is the structural representation of the utility model example 1;
Fig. 2 is the structural representation of the utility model example 2;
Fig. 3 is the structural representation of the utility model example 3;
Fig. 4 is the structural representation of the utility model example 4;
Fig. 5 is the structural representation of the utility model example 5.
Fig. 6 is that the former limit of the utility model resonant element expands to multiunit structural representation.
Fig. 7 is the equivalent operating circuit of example 2.
Fig. 8 is the main input-output wave shape figure of example 2.
Fig. 9 is the equivalent resonant circuit of example 2.
In figure: 1-positive and negative voltage sources; 2-the first choke; 3-the first choke; 4-the first inductance; 5-the first electric capacity; 6-the second inductance; 7-the second electric capacity; 8-the first resonant switch; 9-the second resonance is opened also; 10-transformer; 11-capacitance; 12-filter unit; 13-load; 14-direct current output unit; 15-magnetic bias power supply; 16-current-limiting resistance; 17-choke; 18-direct current output unit; 19-represents common node; 20-represents ground connection; 21,22-choke; 23-common node; 24,25-resonant switch; 26,27-protected location.
embodiment:
Below in conjunction with accompanying drawing, technical solutions of the utility model are described below.
example 1
As shown in Figure 1, controlled resonant converter of the present utility model, former limit resonant element, transformer 10, biasing circuit and secondary output unit, former limit resonant element comprises positive and negative voltage sources, choke, resonant element and resonant switch.Secondary output unit comprises every straight unit, pulse choking coil and direct current output unit.Resonant element comprises the first resonant element, the second resonant element.The first resonant element comprises that the first inductance 4, the first electric capacity 5, the second resonant elements comprise the second inductance 6, the second electric capacity 7.
As shown in Figure 1, the first output of positive and negative voltage sources 1 is connected with the former limit winding first input end a of transformer 10 through choke 2, the first inductance 4, the first electric capacity 5 successively specifically.
As shown in Figure 1, the 3rd output of positive and negative voltage sources 1 is connected with the former limit winding second input c of transformer 10 through choke 3, the first inductance 6, the first electric capacity 7 successively specifically.
As shown in Figure 1, the first input end of transformer 10 is connected to common node 19 through the first electric capacity 5, the first inductance 4, resonant switch 8 successively specifically, and the centre tap input b of the second output of positive and negative voltage sources 1 and the former limit winding of transformer 10 is also connected to common node 19 simultaneously.
As shown in Figure 1, the 3rd input of transformer 10 is connected to common node 19 through the second electric capacity 7, the second inductance 6, resonant switch 9 successively specifically.
Biasing circuit comprises magnetic bias power supply 15, current-limiting resistance 16 and choke 17, magnetic bias positive source is connected to transformer primary side winding four-input terminal d through current-limiting resistance, choke successively, and magnetic bias power supply 15 negative poles are connected to transformer primary side winding the 5th input e.
example 2
As shown in Figure 2, this example is that with the difference of example 1 the first output of positive and negative voltage sources 1 is connected with the former limit winding first input end a of transformer 10 through choke 2, the first electric capacity 5, the first inductance 4 successively, and the 3rd output of positive and negative voltage sources 1 is connected with the former limit winding second input c of transformer 10 through choke 3, the first electric capacity 7, the first inductance 6 successively.
operation principle of the present utility model is as follows:
Accompanying drawing 2 take below as main, narrate specific works principle of the present utility model:
Positive and negative voltage sources 1 gives the first electric capacity 5, choke 3 to the second electric capacity 7 chargings by choke 2 respectively, control circuit is controlled resonant switch 8,9 conductings formation resonant circuits and is provided energy to transformer secondary, resonant circuit comprises transformer primary side, the first resonant element, resonant switch and the second resonant element, the equivalent operating circuit of Fig. 2 as shown in Figure 7.
In Fig. 7, Cs is capacitance after the first electric capacity, the second capacitances in series, N is that the secondary of pulse transformer 10 is than the former limit turn ratio, Cc is every straight unit capacitance, and Cp is load capacitance, and Lr is pulse transformer leakage inductance, i1 is transformer primary side electric current, i2 is transformer secondary current, and n1, n2 are two umber of turns of transformer primary side, and n3 is transformer secondary umber of turn.
Main waveform as shown in Figure 8, wherein i1m is transformer primary side current peak, Tr is harmonic period, Ts is resonant switch switch periods, Ubase is direct current output unit output voltage, U2m is pulse transformer output voltage peak value, and Upulse is voltage peak in load, and i2m is transformer output current peak value.
The equivalent resonant circuit of Fig. 2 as shown in Figure 9, visible by equivalent resonant circuit and main waveform, the width of load both end voltage u2 was determined by the cycle of equivalent resonant circuit, and equivalent harmonic period and Cc, Cp and N are relevant, from equivalent electric circuit, turn ratio N is larger, the amplitude of u2 is larger, but the pulse period is larger, in some application scenarios, need the control impuls cycle in certain scope, at this time just need to reduce turn ratio N, like this just need to increase busbar voltage u0, this can bring again the too high problem of resonant switch voltage stress, cause the increase of cost, and the utility model is owing to having adopted the mode of 2 resonant switch series connection, greatly reduced the voltage stress of resonant switch, thereby reduced the cost of system, simultaneously, resonant switch tie point has been connected to transformer primary side centre tap, even if there is the problem that resonant switch is not opened simultaneously, also can rely on transformer centre tap to form resonant tank, thereby the situation of having avoided bearing 2 times of voltage stresss on single resonant switch and having damaged occurs.Simultaneously, the topology of the utility model Fig. 2 is full symmetric from structure, can effectively suppress differential mode noise, in addition, by transformer primary side winding centre tap ground connection, noise current can flow into the earth by centre tap, can effectively improve resonance current waveform under large current conditions, and can the impact of noise decrease electric current on other parts of system.The utility model Fig. 1 topology, in the situation that keeping secondary output, can be shunted by a plurality of former limit of parallel connection resonant circuit in addition, thereby reduces the current stress of resonant switch; Also can increase in this way the power output of circuit.
example 3
As shown in Figure 3, this example is that with the difference of example 1 the first inductance 4 and the first inductance 6 are omitted, and their effect can be replaced by the leakage inductance of transformer, and the size of its sense value depends on the design technology of transformer.
example 4
As shown in Figure 4; this example and example 1 to the difference of example 3 be resonant switch 8 in parallel protected location 26; resonant switch 9 two ends parallel connections protected location 27; protected location is for the protection of resonant switch; it can be passive clamping absorbing circuit; as forms such as RCD, RC, it can be also active clamp circuit.
example 5
As shown in Figure 5, above-mentioned example 1 can improve output pulse power by expanding the mode of 2 road transformer primary side resonant circuits to example 3, also can reduce the current stress of resonant switch simultaneously.
As shown in Figure 5, the transformer primary side circuit of expansion adopts second positive and negative voltage sources to power, but this not necessarily, also can only adopt a positive and negative voltage sources, the first output that is about to positive and negative voltage sources 1 is connected to resonant switch 24, the 3rd output of positive and negative voltage sources 1 is connected to resonant switch 25, and the second output of positive and negative voltage sources 1 is connected to common node 19.
example 6
The mode that can expand 2 road transformer primary side resonant circuits in above-mentioned example 5 improves output pulse power, reduces the current stress of resonant switch simultaneously, but is not limited to only expand 2 tunnels, can need to expand more multichannel according to application, as shown in Figure 6.
Preferably, above-mentioned example 1 is connected to ground 20 to the common node 19 in example 4, but that this is not the utility model is necessary, even if common node 19 is free of attachment to ground 20, does not also affect the application of this converter.
Preferably, above-mentioned example 1 is identical with the second inductance 6 sense values to the first inductance 4 in example 4, the first electric capacity 5 is identical with the first electric capacity 7 capacitances, but it is necessary that this is not the utility model, even if the parameter of the parameter of the first inductance 4 and the second inductance 6, the first electric capacity 5 and the first electric capacity 7 is not identical, do not affect the practical application of this converter yet.
Above content is in conjunction with concrete preferred embodiment further detailed description of the utility model, can not assert that concrete enforcement of the present utility model is confined to above these explanations.For the utility model person of ordinary skill in the field, without departing from the concept of the premise utility, can also make some simple deduction or replace, all should be considered as belonging to protection range of the present utility model.
Claims (9)
1. a controlled resonant converter, comprise former limit resonant element, transformer (10), biasing circuit and secondary output unit, it is characterized in that: described former limit resonant element comprises positive and negative voltage sources (1), choke (2), resonant element and resonant switch, described positive and negative voltage sources (1) first output is connected with transformer primary side winding first input end (a) through the first choke (2), the first resonant element; Positive and negative voltage sources (1) second output is connected with transformer primary side winding the second input (c) through the second choke (3), the second resonant element; Positive and negative voltage sources (1) the 3rd output connects respectively the output of the first resonant switch, centre tap input (b) the ground connection of the input of the second resonant switch, transformer primary side winding; The input of the first resonant switch is connected between the first choke and the first resonant element, and the output of the second resonant switch is connected between the second choke (3) and the second resonant element.
2. controlled resonant converter according to claim 1, it is characterized in that: described secondary output unit comprises: every straight unit (11), filter unit (12), load (13) and direct current output unit (14), transformer secondary winding the first output is connected to every straight unit (11), every straight unit (11), be connected to load (13), direct current output unit the first output is connected to filter unit (12), filter unit (12) connects load (13), transformer secondary winding the second output connects direct current output unit (14) second inputs and load (13) second inputs while ground connection.
3. controlled resonant converter according to claim 1, is characterized in that: described the first resonant element adopts the first electric capacity; The second resonant element adopts the second electric capacity.
4. controlled resonant converter according to claim 1, is characterized in that: described the first resonant element is formed by the first inductance and the first capacitances in series successively; The second resonant element is formed by the second inductance and the second capacitances in series successively.
5. controlled resonant converter according to claim 1, is characterized in that: this controlled resonant converter also comprises the first protected location and the second protected location; First protected location one end is connected between the first choke and the first resonant element, and the other end is connected with the 3rd output of positive and negative voltage sources; Second protected location one end is connected between the second choke and the second resonant element, and the other end is connected with the 3rd output of positive and negative voltage sources.
6. according to the controlled resonant converter described in claim 1,2,3,4 or 5, it is characterized in that: described former limit resonant element expands to two or more unit.
7. controlled resonant converter according to claim 4, is characterized in that: described the first electric capacity and the second capacitor's capacity equate; The first inductance and the second inductance sense value equate.
8. controlled resonant converter according to claim 1, is characterized in that: described positive and negative voltage sources is industrial frequency rectifying power supply or ac voltage regulator or DC voltage regulator power supply or Switching Power Supply.
9. controlled resonant converter according to claim 1, is characterized in that: described the first resonant switch and the second resonant switch adopt semiconductor switch, for example IGBT, IGCT, GTO; Described filter unit is high voltage induction or diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420165665.3U CN203827179U (en) | 2014-04-04 | 2014-04-04 | Novel resonant converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420165665.3U CN203827179U (en) | 2014-04-04 | 2014-04-04 | Novel resonant converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203827179U true CN203827179U (en) | 2014-09-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420165665.3U Withdrawn - After Issue CN203827179U (en) | 2014-04-04 | 2014-04-04 | Novel resonant converter |
Country Status (1)
| Country | Link |
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| CN (1) | CN203827179U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103944389A (en) * | 2014-04-04 | 2014-07-23 | 南京国电环保科技有限公司 | Novel resonant converter |
| CN106208795A (en) * | 2014-09-30 | 2016-12-07 | 浦项爱希谛科技有限公司 | High voltage pulse switching system and comprise the electric dust collector of this system |
| CN110931221A (en) * | 2019-12-06 | 2020-03-27 | 西北核技术研究院 | Primary busbar and primary circuit structure of pulse transformer |
-
2014
- 2014-04-04 CN CN201420165665.3U patent/CN203827179U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103944389A (en) * | 2014-04-04 | 2014-07-23 | 南京国电环保科技有限公司 | Novel resonant converter |
| CN103944389B (en) * | 2014-04-04 | 2016-02-10 | 南京国电环保科技有限公司 | A kind of novel controlled resonant converter |
| CN106208795A (en) * | 2014-09-30 | 2016-12-07 | 浦项爱希谛科技有限公司 | High voltage pulse switching system and comprise the electric dust collector of this system |
| CN106208795B (en) * | 2014-09-30 | 2018-11-16 | 浦项爱希谛科技有限公司 | High voltage pulse switching system and electric dust collector comprising the system |
| CN110931221A (en) * | 2019-12-06 | 2020-03-27 | 西北核技术研究院 | Primary busbar and primary circuit structure of pulse transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140910 Effective date of abandoning: 20160210 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |