CN208386423U - A kind of LLC series resonant circuit - Google Patents
A kind of LLC series resonant circuit Download PDFInfo
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- CN208386423U CN208386423U CN201820920869.1U CN201820920869U CN208386423U CN 208386423 U CN208386423 U CN 208386423U CN 201820920869 U CN201820920869 U CN 201820920869U CN 208386423 U CN208386423 U CN 208386423U
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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 relates to a kind of LLC series resonant circuits, belong to resonance circuit technical field.The circuit includes rectification circuit, electric capacity of voltage regulation, driving unit, resonance circuit and output circuit；The rectification circuit is diode bridge rectifier circuit, is connected with electric capacity of voltage regulation C1 on the positive-negative output end of bridge rectifier；The driving unit includes driver U1, resistance R1-R5, capacitor C2-C4, CMOS tube Q1, Q2, the resonance circuit include the capacitor Cr being sequentially connected in series, inductance Lr and inductance Lm, one end of the resonance circuit is connected to the output end of driver U1, other end ground connection, and the output circuit is connected to resonance circuit.The utility model uses self-oscillating driver, circuit structure is simplified, while can be adjusted to self-oscillating driver resonance frequency, so that the scope of application is wider.
Description
Technical field
The utility model belongs to resonance circuit technical field, is related to a kind of LLC series resonant circuit.
Background technique
As Switching Power Supply goes out in the application to high frequency, efficiently with the development in high power density direction, traditional hard switching
Showed many problems, as switching loss is big, electromagnetic interference is big and it is easy to damage the problems such as.In order to overcome hard switching in the application all
More disadvantages, soft switch technique come into being, it carries out shaping using inductance and capacitor come the switching trace to switch, by electricity
Make switch element open-minded when pressure is zero, turn off switch element when electric current is zero, to eliminate switching loss.
Resonance circuit can make switch element be connected or close when voltage zero or electric current are zero using the resonance of circuit
It is disconnected, to realize the reduction of switching loss.Since LLC resonance can not only realize no-voltage conducting, the pair side of primary side switch pipe
The zero-current switching of diode reduces switching loss, and resonant inductance and magnetizing inductance is integrated in transformer, reduces
The volume of transformer improves power density, while it can be such that output voltage is not lacked by duty ratio using frequency modulation control
The influence of mistake outputs and inputs voltage range with wider, so being widely used in high frequency and hyperfrequency field
And development.
Currently, energy conservation is an important trend of power technology, efficiency, power density, reliability of power supply etc. are proposed
Higher requirement, under the influence of this trend, LLC resonant cavity in the industry cycle using more and more extensive, it is therefore necessary to mention
The LLC resonance circuit of a kind of high efficient and reliable out.
Utility model content
In view of this, simplifying circuit structure the purpose of this utility model is to provide a kind of LLC series resonant circuit and improving
Circuit reliability, and realize that resonant-frequency adjustable is applied widely.
In order to achieve the above objectives, the utility model provides the following technical solutions:
A kind of LLC series resonant circuit, the circuit include rectification circuit, electric capacity of voltage regulation, driving unit, resonance circuit and defeated
Circuit out；
The rectification circuit is diode bridge rectifier circuit, is connected with pressure stabilizing on the positive-negative output end of bridge rectifier
Capacitor C1；
The driving unit includes driver U1, resistance R1-R5, capacitor C2-C4, CMOS tube Q1, Q2, the resistance R1 and
Capacitor C2 is connected to the positive-negative output end of bridge rectifier after being serially connected, the power end of driver U1 be connected to resistance R1 and
Between capacitor C2, end is grounded by the series connection of resistance R2 and capacitor C3 when the ohmer of driver U1, the C meter of driver U1
Shi Duan is grounded by capacitor C3, and the leading end of driver U1 is connected to the grid of CMOS tube Q1 by capacitor C4, driver U1's
High-voltage end is connected to the grid of CMOS tube Q1 by resistance R4, and the low-pressure end of driver U1 is connected to CMOS tube Q2 by resistance R5
Grid, the grid of CMOS tube Q2 is grounded by resistance R6, and the output end of driver U1 is connected to the drain electrode of the source electrode and Q2 of Q1,
The source electrode of CMOS tube Q2 is grounded, and the drain electrode of CMOS tube Q1 is connected to the positive output end of bridge rectifier；
The resonance circuit includes the capacitor Cr, inductance Lr and inductance Lm being sequentially connected in series, and one end of the resonance circuit connects
It is connected to the output end of driver U1, other end ground connection, the output circuit is connected to resonance circuit.
Further, the output circuit includes transformer T, diode D1, D2, capacitor C5；
The primary side of the transformer is connected in parallel on the both ends inductance Lm, and two output ends on secondary side are respectively connected to diode D1,
The anode of D2, cathode output end of the midpoint lead-out wire on secondary side as output circuit, the cathode of diode D1, D2 are connected with each other it
The cathode output end for forming output circuit afterwards, is connected with capacitor C5 between cathode output end and cathode output end.
Further, the driver U1 is L6569 self-oscillating driver.
Further, the resistance R2 is adjustable resistance, and capacitor C3 is tunable capacitor.
The utility model has the beneficial effects that: the utility model uses self-oscillating driver, circuit structure is simplified, together
When self-oscillating driver resonance frequency can be adjusted, so that the scope of application is wider.
Detailed description of the invention
In order to keep the purpose of this utility model, technical scheme and beneficial effects clearer, the utility model provides as follows
Attached drawing is illustrated:
Fig. 1 is the utility model circuit structure diagram.
Specific embodiment
Below in conjunction with attached drawing, the preferred embodiment of the utility model is described in detail.
As shown in Figure 1, the utility model is a kind of LLC series resonant circuit, which successively includes rectification circuit, pressure stabilizing
Capacitor, driving unit, resonance circuit and output circuit.
Rectification circuit is diode bridge rectifier circuit, is connected with electric capacity of voltage regulation on the positive-negative output end of bridge rectifier
C1。
Driving unit includes driver U1, resistance R1-R5, capacitor C2-C4, CMOS tube Q1, Q2, resistance R1 and capacitor C2 phase
Mutually be connected to the positive-negative output end of bridge rectifier after series connection, the power end of driver U1 be connected to resistance R1 and capacitor C2 it
Between, end is grounded by the series connection of resistance R2 and capacitor C3 when the ohmer of driver U1, and end passes through when the C meter of driver U1
Capacitor C3 ground connection, the leading end of driver U1 are connected to the grid of CMOS tube Q1 by capacitor C4, and the high-voltage end of driver U1 is logical
The grid that resistance R4 is connected to CMOS tube Q1 is crossed, the low-pressure end of driver U1 is connected to the grid of CMOS tube Q2 by resistance R5,
The grid of CMOS tube Q2 is grounded by resistance R6, and the output end of driver U1 is connected to the drain electrode of the source electrode and Q2 of Q1, CMOS tube
The source electrode of Q2 is grounded, and the drain electrode of CMOS tube Q1 is connected to the positive output end of bridge rectifier, wherein driver U1 be L6569 oneself
Oscillatory driver.Resistance R2 is adjustable resistance, and capacitor C3 is tunable capacitor, by adjusting the resistance or electricity of resistance R2 and capacitor C3
Capacitance can be adjusted the frequency of oscillation of L6569 self-oscillating driver, so as to adjust the switch frequency of control CMOS tube Q1, Q2
Rate realizes the adjustment to output frequency.
Resonance circuit includes the capacitor Cr, inductance Lr and inductance Lm being sequentially connected in series, and one end of resonance circuit is connected to driving
The output end of device U1, other end ground connection, output circuit are connected to resonance circuit.
Output circuit includes transformer T, diode D1, D2, capacitor C5, and the primary side of transformer is connected in parallel on the both ends inductance Lm,
Two output ends on secondary side are respectively connected to diode D1, and the anode of D2, the midpoint lead-out wire on secondary side is as the negative of output circuit
Pole output end, the cathode of diode D1, D2 form the cathode output end of output circuit after being connected with each other, cathode output end with just
Capacitor C5 is connected between the output end of pole.
The above descriptions are merely preferred embodiments of the present invention, not makees in any form to the utility model
Limitation be not intended to limit the utility model although the utility model has been disclosed with preferred embodiment as above, it is any ripe
Professional and technical personnel is known, is not being departed within the scope of technical solutions of the utility model, when in the technology using the disclosure above
Hold the equivalent embodiment for being modified or being modified to equivalent variations, but all without departing from technical solutions of the utility model
Hold, any simple modification, equivalent change and modification made by the above technical examples according to the technical essence of the present invention, still
It is within the scope of the technical solutions of the present invention.
Claims (4)
1. a kind of LLC series resonant circuit, it is characterised in that: the circuit includes rectification circuit, and electric capacity of voltage regulation, driving unit is humorous
Shake circuit and output circuit；
The rectification circuit is diode bridge rectifier circuit, is connected with electric capacity of voltage regulation on the positive-negative output end of bridge rectifier
C1；
The driving unit includes driver U1, resistance R1-R5, capacitor C2-C4, CMOS tube Q1, Q2, the resistance R1 and capacitor
C2 is connected to the positive-negative output end of bridge rectifier after being serially connected, the power end of driver U1 is connected to resistance R1 and capacitor
Between C2, end is grounded by the series connection of resistance R2 and capacitor C3 when the ohmer of driver U1, the end when C meter of driver U1
It is grounded by capacitor C3, the leading end of driver U1 is connected to the grid of CMOS tube Q1, the high pressure of driver U1 by capacitor C4
End is connected to the grid of CMOS tube Q1 by resistance R4, and the low-pressure end of driver U1 is connected to the grid of CMOS tube Q2 by resistance R5
The grid of pole, CMOS tube Q2 is grounded by resistance R6, and the output end of driver U1 is connected to the drain electrode of the source electrode and Q2 of Q1, CMOS
The source electrode of pipe Q2 is grounded, and the drain electrode of CMOS tube Q1 is connected to the positive output end of bridge rectifier；
The resonance circuit includes the capacitor Cr being sequentially connected in series, and inductance Lr and inductance Lm, one end of the resonance circuit are connected to
The output end of driver U1, other end ground connection, the output circuit are connected to resonance circuit.
2. a kind of LLC series resonant circuit according to claim 1, it is characterised in that: the output circuit includes transformation
Device T, diode D1, D2, capacitor C5；
The primary side of the transformer is connected in parallel on the both ends inductance Lm, and two output ends on secondary side are respectively connected to diode D1, D2's
Anode, cathode output end of the midpoint lead-out wire on secondary side as output circuit, shape after the cathode of diode D1, D2 are connected with each other
Capacitor C5 is connected at the cathode output end of output circuit, between cathode output end and cathode output end.
3. a kind of LLC series resonant circuit according to claim 1, it is characterised in that: the driver U1 be L6569 from
Oscillatory driver.
4. a kind of LLC series resonant circuit according to claim 1, it is characterised in that: the resistance R2 is adjustable resistance,
Capacitor C3 is tunable capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820920869.1U CN208386423U (en) | 2018-06-14 | 2018-06-14 | A kind of LLC series resonant circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820920869.1U CN208386423U (en) | 2018-06-14 | 2018-06-14 | A kind of LLC series resonant circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208386423U true CN208386423U (en) | 2019-01-15 |
Family
ID=64966683
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820920869.1U Active CN208386423U (en) | 2018-06-14 | 2018-06-14 | A kind of LLC series resonant circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208386423U (en) |
-
2018
- 2018-06-14 CN CN201820920869.1U patent/CN208386423U/en active Active
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