CN204179949U - A kind of resonance soft switch circuit - Google Patents
A kind of resonance soft switch circuit Download PDFInfo
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- CN204179949U CN204179949U CN201420564928.8U CN201420564928U CN204179949U CN 204179949 U CN204179949 U CN 204179949U CN 201420564928 U CN201420564928 U CN 201420564928U CN 204179949 U CN204179949 U CN 204179949U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The utility model discloses a kind of resonance soft switch circuit, comprising: export commutation sub-circuit and full-bridge inverting harmonic oscillator circuit; Full-bridge inverting harmonic oscillator circuit comprises: switching tube M1 ', M2 ', M3 ', M4 ', transformer T ', resonant capacitance Cr ', resonant inductance Lr ' and Lp '; Switching tube M1 ' drain respectively with input power one end, switching tube M4 ' drain be connected; Switching tube M1 ' source electrode respectively with resonant capacitance Cr ' one end, switching tube M2 ' drain be connected; Switching tube M2 ' source electrode respectively with the input power other end, switching tube M3 ' source electrode be connected; Switching tube M3 ' the drain electrode elementary different name end with transformer T ' respectively, switching tube M4 ' source electrode is connected; Resonant capacitance Cr ' the other end is connected with the elementary Same Name of Ends of transformer T '; The secondary Same Name of Ends of transformer T ' is connected with output commutation sub-circuit; The secondary different name end of transformer T ' is connected with resonant inductance Lr ' one end; Resonant inductance Lr ' the other end respectively with output commutation sub-circuit, resonant inductance Lp ' one end be connected; Resonant inductance Lp ' the other end is connected with output commutation sub-circuit.Adopt the utility model not only can simplify the design difficulty of resonance resonance soft switch circuit, also can improve the precision of product.
Description
Technical field
The utility model relates to electric and electronic technical field, particularly relates to a kind of resonance soft switch circuit.
Background technology
LLC resonant circuit owing to there is high efficiency, low noise, being easy to realize the advantages such as Sofe Switch, and in the middle of the exploitation being widely used in Switching Power Supply.In the middle of existing product and data, developer, when designing a power supply, is primary side LLC resonant circuit being positioned over transformer, and then through the isolated variable of transformer, by exporting a galvanic current pressure after rectification.As shown in Figure 1, wherein, input voltage is Ci both end voltage, M1 ~ M4 is MOSFET (Metal-Oxide-Semiconductor Field-EffectTransistor, metal oxide layer semiconductor field-effect transistor, is called for short metal-oxide half field effect transistor), Lr is series resonance inductor, Cr is resonant capacitance, Lp is external magnetizing inductance, and T is isolating transformer, and M5 ~ M8 is for exporting rectification MOSFET, Co is output filter capacitor, and Ro is load.
In EPS product (direct current 48V inputs, and alternating current 220V exports), Ci two ends are generally the storage battery of 48V input, and Co two ends are the DC bus-bar voltage of 360V ~ 400V.In communication power supply product (alternating current 220V inputs, and direct current 48V exports), Ci two ends are generally 360V ~ 400V DC bus-bar voltage, and Co is the output of 48V direct current.
But in the described LLC resonant circuit process of application, designer finds prior art, and there are the following problems:
Existing in LLC circuit, resonant inductance is usually less, and the order of magnitude is about a few microhenry.Therefore, under less resonant inductance condition, comparatively complicated for Design of Transformer, in addition, except the leakage inductance of transformer is kept away unavoidably, different transformer windings leakage inductance is out also often different, thus causes the discrete type of product by poor.
Utility model content
Embodiment of the present utility model provides a kind of resonance soft switch circuit.For achieving the above object, embodiment of the present utility model adopts following technical scheme:
A kind of resonance soft switch circuit that the utility model provides, comprising: export commutation sub-circuit and full-bridge inverting harmonic oscillator circuit; Described full-bridge inverting harmonic oscillator circuit comprises: switching tube M1 ', M2 ', M3 ', M4 ', transformer T ', resonant capacitance Cr ', resonant inductance Lr ' and Lp ';
Described switching tube M1 ' drain respectively with input power one end, described switching tube M4 ' drains and is connected; Described switching tube M1 ' source electrode respectively with described resonant capacitance Cr ' one end, described switching tube M2 ' drains and is connected;
Described switching tube M2 ' source electrode respectively with the described input power other end, described switching tube M3 ' source electrode be connected;
Described switching tube M3 ' drain electrode different name end elementary with described transformer T ' respectively, described switching tube M4 ' source electrode is connected;
The described resonant capacitance Cr ' other end is connected with the elementary Same Name of Ends of described transformer T '; The secondary Same Name of Ends of described transformer T ' is connected with described output commutation sub-circuit;
Described transformer T ' secondary different name end is connected with described resonant inductance Lr ' one end; The described resonant inductance Lr ' other end respectively with described output commutation sub-circuit, described resonant inductance Lp ' one end be connected; The described resonant inductance Lp ' other end is connected with described output commutation sub-circuit.
A kind of resonance soft switch circuit that the utility model provides, by by resonant capacitance Cr ', resonant inductance Lr ' and resonance inductance L p ' is arranged at transformer T ' both sides respectively, transformer T ' primary coil side is arranged at by described resonant capacitance Cr ', described resonant inductance Lr ' and resonance inductance L p ' is arranged at transformer T ' secondary coil side, make resonant inductance larger, thus make with this resonant inductance with the use of the design difficulty of transformer reduce, thus greatly reduce design difficulty and cost, and improve the design accuracy of product.
Accompanying drawing explanation
Fig. 1 is the circuit diagram that in prior art, LLC resonant circuit is applied in Sofe Switch;
A kind of resonance soft switch circuit structural representation that Fig. 2 provides for the utility model embodiment;
A kind of resonance soft switch circuit figure that Fig. 3 provides for the utility model embodiment;
The another kind of resonance soft switch circuit figure that Fig. 4 provides for the utility model embodiment.
Embodiment
Below in conjunction with accompanying drawing, a kind of resonance soft switch circuit that the utility model embodiment provides is described in detail.
As shown in Figure 1, be a kind of resonance soft switch circuit that the utility model embodiment provides, this circuit comprises: export commutation sub-circuit and full-bridge inverting harmonic oscillator circuit; Described full-bridge inverting harmonic oscillator circuit comprises: switching tube M1 ', M2 ', M3 ', M4 ', transformer T ', resonant capacitance Cr ', resonant inductance Lr ' and Lp ';
Described switching tube M1 ' drain respectively with input power one end, described switching tube M4 ' drains and is connected; Described switching tube M1 ' source electrode respectively with described resonant capacitance Cr ' one end, described switching tube M2 ' drains and is connected;
Described switching tube M2 ' source electrode respectively with the described input power other end, described switching tube M3 ' source electrode be connected;
Described switching tube M3 ' drain electrode different name end elementary with described transformer T ' respectively, described switching tube M4 ' source electrode is connected;
The described resonant capacitance Cr ' other end is connected with the elementary Same Name of Ends of described transformer T '; The secondary Same Name of Ends of described transformer T ' is connected with described output commutation sub-circuit;
Described transformer T ' secondary different name end is connected with described resonant inductance Lr ' one end; The described resonant inductance Lr ' other end respectively with described output commutation sub-circuit, described resonant inductance Lp ' one end be connected; The described resonant inductance Lp ' other end is connected with described output commutation sub-circuit.
Based on above embodiment, as shown in Figure 2, be a kind of resonance soft switch circuit that the utility model embodiment provides, this circuit comprises: export commutation sub-circuit and full-bridge inverting harmonic oscillator circuit;
Described full-bridge inverting harmonic oscillator circuit comprises: switching tube M1 ', M2 ', M3 ', M4 ', transformer T ', resonant capacitance Cr ', resonant inductance Lr ' and Lp ';
Described switching tube M1 ' drain respectively with input power one end, described switching tube M4 ' drains and is connected; Described switching tube M1 ' source electrode respectively with described resonant capacitance Cr ' one end, described switching tube M2 ' drains and is connected;
Described switching tube M2 ' source electrode respectively with the described input power other end, described switching tube M3 ' source electrode be connected;
Described switching tube M3 ' drain electrode different name end elementary with described transformer T ' respectively, described switching tube M4 ' source electrode is connected;
The described resonant capacitance Cr ' other end is connected with the elementary Same Name of Ends of described transformer T '; The secondary Same Name of Ends of described transformer T ' is connected with described output commutation sub-circuit;
Described transformer T ' secondary different name end is connected with described resonant inductance Lr ' one end; The described resonant inductance Lr ' other end respectively with described output commutation sub-circuit, described resonant inductance Lp ' one end be connected; The described resonant inductance Lp ' other end is connected with described output commutation sub-circuit.
Described output commutation sub-circuit comprises: switching tube M5 ', switching tube M6 ', switching tube M7 ', switching tube M8 ',
Described switching tube M5 ' drains, and described switching tube M8 ' drain electrode is connected with output loading one end;
Described switching tube M5 ' source electrode respectively with described resonant inductance Lr ' one end, one end of described resonant inductance Lp ', described switching tube M6 ' drains and is connected; Described switching tube M6 ' source electrode is connected with the output loading other end;
Described switching tube M8 ' source electrode respectively with described transformer secondary output Same Name of Ends, the described resonant inductance Lp ' other end, described switching tube M7 ' drains and is connected; Described switching tube M7 ' source electrode is connected with the output loading other end with described.
Based on above embodiment, as shown in Figure 3, be a kind of resonance soft switch circuit that the utility model embodiment provides, this circuit comprises: export commutation sub-circuit and full-bridge inverting harmonic oscillator circuit;
Described full-bridge inverting harmonic oscillator circuit comprises: switching tube M1 ', M2 ', M3 ', M4 ', transformer T ', resonant capacitance Cr ', resonant inductance Lr ' and Lp ';
Described switching tube M1 ' drain respectively with input power one end, described switching tube M4 ' drains and is connected; Described switching tube M1 ' source electrode respectively with described resonant capacitance Cr ' one end, described switching tube M2 ' drains and is connected;
Described switching tube M2 ' source electrode respectively with the described input power other end, described switching tube M3 ' source electrode be connected;
Described switching tube M3 ' drain electrode different name end elementary with described transformer T ' respectively, described switching tube M4 ' source electrode is connected;
The described resonant capacitance Cr ' other end is connected with the elementary Same Name of Ends of described transformer T '; The secondary Same Name of Ends of described transformer T ' is connected with described output commutation sub-circuit;
Described transformer T ' secondary different name end is connected with described resonant inductance Lr ' one end; The described resonant inductance Lr ' other end respectively with described output commutation sub-circuit, described resonant inductance Lp ' one end be connected; The described resonant inductance Lp ' other end is connected with described output commutation sub-circuit.
Described output commutation sub-circuit comprises: diode D1, diode D2, diode D3, diode D4;
Described diode D1 negative electrode, described diode D4 negative electrode is connected with output loading one end;
Described diode D1 anode respectively with institute diode D2 negative electrode, described resonant inductance Lr ' one end, described resonant inductance Lp ' one end be connected;
Described diode D4 anode respectively with institute diode D3 negative electrode, described transformer secondary output Same Name of Ends be connected, the described resonant inductance Lp ' other end be connected;
Described diode D2 anode, described diode D3 anode is connected with the described output loading other end.
It should be noted that, described diode D1, D2, D3, D4 are rectifier diode.
A kind of resonance soft switch circuit that the utility model provides, by by resonant capacitance Cr ', resonant inductance Lr ' and resonance inductance L p ' is arranged at transformer T ' both sides respectively, transformer T ' primary coil side is arranged at by described resonant capacitance Cr ', described resonant inductance Lr ' and resonance inductance L p ' is arranged at transformer T ' secondary coil side, make resonant inductance larger, thus make with this resonant inductance with the use of the design difficulty of transformer reduce, thus greatly reduce design difficulty and cost, and improve the design accuracy of product.
The above; be only embodiment of the present utility model; but protection range of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; change can be expected easily or replace, all should be encompassed within protection range of the present utility model.Therefore, protection range of the present utility model should described be as the criterion with the protection range of claim.
Claims (4)
1. a resonance soft switch circuit, comprising: export commutation sub-circuit; It is characterized in that, this circuit also comprises: full-bridge inverting harmonic oscillator circuit; Described full-bridge inverting harmonic oscillator circuit comprises: switching tube M1 ', M2 ', M3 ', M4 ', transformer T ', resonant capacitance Cr ', resonant inductance Lr ' and Lp ';
Described switching tube M1 ' drain respectively with input power one end, described switching tube M4 ' drains and is connected; Described switching tube M1 ' source electrode respectively with described resonant capacitance Cr ' one end, described switching tube M2 ' drains and is connected;
Described switching tube M2 ' source electrode respectively with the described input power other end, described switching tube M3 ' source electrode be connected;
Described switching tube M3 ' drain electrode different name end elementary with described transformer T ' respectively, described switching tube M4 ' source electrode is connected;
The described resonant capacitance Cr ' other end is connected with the elementary Same Name of Ends of described transformer T '; The secondary Same Name of Ends of described transformer T ' is connected with described output commutation sub-circuit;
Described transformer T ' secondary different name end is connected with described resonant inductance Lr ' one end; The described resonant inductance Lr ' other end respectively with described output commutation sub-circuit, described resonant inductance Lp ' one end be connected; The described resonant inductance Lp ' other end is connected with described output commutation sub-circuit.
2. resonance soft switch circuit according to claim 1, is characterized in that, described output commutation sub-circuit comprises: switching tube M5 ', switching tube M6 ', switching tube M7 ', switching tube M8 ',
Described switching tube M5 ' drains, and described switching tube M8 ' drain electrode is connected with output loading one end;
Described switching tube M5 ' source electrode respectively with described resonant inductance Lr ' one end, one end of described resonant inductance Lp ', described switching tube M6 ' drains and is connected; Described switching tube M6 ' source electrode is connected with the output loading other end;
Described switching tube M8 ' source electrode respectively with described transformer secondary output Same Name of Ends, the described resonant inductance Lp ' other end, described switching tube M7 ' drains and is connected; Described switching tube M7 ' source electrode is connected with the output loading other end with described.
3. resonance soft switch circuit according to claim 1, is characterized in that, described output commutation sub-circuit comprises: diode D1, diode D2, diode D3, diode D4;
Described diode D1 negative electrode, described diode D4 negative electrode is connected with output loading one end;
Described diode D1 anode respectively with institute diode D2 negative electrode, described resonant inductance Lr ' one end, described resonant inductance Lp ' one end be connected;
Described diode D4 anode respectively with institute diode D3 negative electrode, described transformer secondary output Same Name of Ends be connected, the described resonant inductance Lp ' other end be connected;
Described diode D2 anode, described diode D3 anode is connected with the described output loading other end.
4. resonance soft switch circuit according to claim 3, is characterized in that, described diode D1, D2, D3, D4 are rectifier diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420564928.8U CN204179949U (en) | 2014-09-28 | 2014-09-28 | A kind of resonance soft switch circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420564928.8U CN204179949U (en) | 2014-09-28 | 2014-09-28 | A kind of resonance soft switch circuit |
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| CN204179949U true CN204179949U (en) | 2015-02-25 |
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| CN201420564928.8U Active CN204179949U (en) | 2014-09-28 | 2014-09-28 | A kind of resonance soft switch circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106208711A (en) * | 2016-07-19 | 2016-12-07 | 东南大学 | A kind of grid drive circuit of the bridge power transducer using SiC power tube |
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2014
- 2014-09-28 CN CN201420564928.8U patent/CN204179949U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106208711A (en) * | 2016-07-19 | 2016-12-07 | 东南大学 | A kind of grid drive circuit of the bridge power transducer using SiC power tube |
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