CN103997217A - Fixed-frequency series resonant converter based on flat inductor - Google Patents

Fixed-frequency series resonant converter based on flat inductor Download PDF

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Publication number
CN103997217A
CN103997217A CN201410249220.8A CN201410249220A CN103997217A CN 103997217 A CN103997217 A CN 103997217A CN 201410249220 A CN201410249220 A CN 201410249220A CN 103997217 A CN103997217 A CN 103997217A
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China
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circuit
feedback control
resonant
inductance
output
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郑峰
张钰
饶仲海
邹托武
严敏
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Ou Lipu Of Wuhan City Energy And Autotek S R L
Xidian University
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Ou Lipu Of Wuhan City Energy And Autotek S R L
Xidian University
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Priority to CN201410249220.8A priority Critical patent/CN103997217A/en
Publication of CN103997217A publication Critical patent/CN103997217A/en
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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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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    • Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier

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Abstract

The invention provides a fixed-frequency series resonant converter based on a flat inductor and belongs to the technical field of resonance power conversion. The fixed-frequency series resonant converter comprises an inverter circuit, a resonance circuit, a transformer, a rectification filtering circuit and a feedback control circuit. The fixed-frequency series resonant converter works in a fixed-frequency operating mode, the resonance inductor adopts design of the flat inductor, a resonance inductor L1 and a feedback control coil L2 are integrated on the flat inductor, saturation degree of a flat inductor magnetic circuit can be controlled by the size of current flowing through the feedback control coil, the size of an inductance value of the inductance coil is controlled, and a gain value of a resonance network at the position of an operating frequency is changed by controlling the position of a resonance operating point. By means of the novel flat inductor, planarity and integration of the inductor are promoted, a novel method for designing the fixed-frequency series resonant converter is provided, no isolation is introduced into a closed-loop control mode of the fixed-frequency series resonant converter, and output loads are fed back directly to complete closed-loop control.

Description

A kind ofly determine frequency series resonant converter based on plate inductance
Technical field
The present invention relates to a kind ofly determine frequency series resonant converter based on plate inductance.
Background technology
Along with the development of modern power electronics technology, the birth of high frequency switching device, conventionally people adopt the way of raising operating frequency to realize the miniaturization of Switching Power Supply, but be subject to the restriction of magnetic element characteristic, can make the core loss of magnetic device significantly increase, therefore when Switching Power Supply works in high frequency, close the choosing of work magnetic of iron core will be much smaller than its saturation magnetic induction, and this further dwindles restriction magnetic device volume.
Controlled resonant converter is owing to using the soft switch technique can be more efficient on the other hand, and has the advantages such as input/output bound is wide, therefore obtained paying close attention to widely and research.Because series transformer has resonant capacitance, can avoid the advantages such as high frequency transformer is saturated, light-load efficiency is high, simplicity of design, it is used widely.But the control mode that series resonant converter is conventional is variable frequency control, there is the problems such as tuning range is wide, starting current is large in it.
Realize the fixed control of mode frequently although there is document to adopt based on ferrite quadrature transformer (PRT), but because this body structure of PRT is as reasons such as volume are larger, the change of its inductance needs larger control electric current, so loss also can increase, therefore adopt fixed mode frequently to realize controlled resonant converter control and be necessary very much.
Summary of the invention
The present invention proposes a kind ofly to determine frequency series resonant converter based on plate inductance, by by integrated inductance coil and FEEDBACK CONTROL coil on plate inductance, realize the complanation of inductance and integrated, solve that traditional frequency conversion series resonant converter tuning range is wide, the large problem of starting current, the series resonant converter close-loop control mode that the present invention takes is without introducing isolation, and closed-loop control has directly been fed back in output loading.
The present invention is specifically achieved through the following technical solutions:
Based on plate inductance determine a frequency series resonant converter, comprise by inverter circuit, resonant circuit, transformer, current rectifying and wave filtering circuit and feedback control circuit and forming,
Described inverter circuit adopts by switching tube M 1, switching tube M 2, capacitor C 1and capacitor C 2the half-bridge inversion circuit of composition, by the control signal driving switch pipe M of fixed frequency 1, switching tube M 2complementary break-make, complete DC inverter and become alternating current;
Described resonant circuit is by resonant inductance L 1with resonance capacitor C 3form;
Described transformer T 1be made up of magnetic core, former limit winding, secondary winding, core material is selected soft magnetic ferrite, and former limit winding, by enamelled wire coiling, connects resonant circuit and inverter circuit and forms series resonance network, and secondary winding, by enamelled wire coiling, connects current rectifying and wave filtering circuit;
Described current rectifying and wave filtering circuit is by diode D 1, diode D 2, diode D 3, diode D 4with output capacitance C 4form full-bridge rectification filter circuit, this current rectifying and wave filtering circuit input connection transformer T 1secondary, output connects output loading R 1, alternating current is transformed into direct current and forms output Uout;
The input of feedback control circuit connects output Uout, and the FEEDBACK CONTROL coil L2 of feedback control circuit is connected to resonant circuit.
Preferably, described resonant inductance L 1adopt plate induction structure, this structure is by the flat plate type magnetic core with borehole structure, resonant inductance L 1, FEEDBACK CONTROL coil L 2form, flat plate type magnetic core is by passing through resonant inductance L 1two row circular holes and one by FEEDBACK CONTROL coil L 2circular hole form, by resonant inductance L 1two row circular holes symmetrical about flat plate type magnetic core center line, by FEEDBACK CONTROL coil L 2circular hole be distributed on the center line of flat plate type magnetic core edge, resonant inductance L 1coil along same coiling direction in turn through two row circular holes, FEEDBACK CONTROL coil L 2vertical through circular hole.
Preferably, by resonant inductance L 1the edge of circular hole have gap.
Preferably, feedback control circuit at least comprises the PI control circuit, PID regulating circuit and the FEEDBACK CONTROL coil L that connect by circuit 2, the second resistance R 2one end connect described output Uout, the other end connects tie point E; The 3rd resistance R 3one end connect tie point E, the other end connects place G 1;
PI control circuit is by the 4th resistance R 4with the 5th capacitor C 5the composition that is connected in parallel, one end of described PI control circuit connects tie point E, and the other end connects tie point F;
PID regulating circuit is by the 5th resistance R 5, the 6th capacitor C 6with the 7th capacitor C 7composition, the 5th resistance R 5with the 6th capacitor C 6after being connected in series again with the 7th capacitor C 7be connected in parallel, one end of described PID regulating circuit connects tie point F, and the other end connects tie point H; The 6th resistance R 6one end connect output Uout, the other end connects tie point H;
The negative electrode of chip TL431 connects tie point H, anodic bonding earth point G 1, connect tie point F with reference to the utmost point; The 7th resistance R 7one end connect output Uout, other end connecting triode Q 1collector electrode, described triode Q 1base stage connect tie point H, this triode Q 1emitter connect voltage-stabiliser tube D 5negative electrode, voltage-stabiliser tube D 5anodic bonding tie point N, the 8th resistance R 8one end connect tie point N, the other end connects earth point G 1; The 9th resistance R 9one end connect tie point N, other end connecting triode Q 2base stage, triode Q 2emitter connect the output first port A of feedback control circuit; The tenth resistance R 10connecting triode Q 2collector electrode, the other end connects output Uout, and the output second port B of feedback control circuit connects earth point G 1; The output first port A of described feedback control circuit is connected respectively the FEEDBACK CONTROL coil L of plate inductance with output the second port B 2two ends.
The beneficial effect that the present invention produces is: the present invention is by by integrated inductance coil and FEEDBACK CONTROL coil on plate inductance, realize the complanation of inductance and integrated, solve that traditional frequency conversion series resonant converter tuning range is wide, the large problem of starting current, the series resonant converter close-loop control mode that the present invention takes is without introducing isolation, and closed-loop control has directly been fed back in output loading.
Brief description of the drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is overall structure framework schematic diagram of the present invention;
Fig. 2 is electrical block diagram of the present invention;
Fig. 3 is planar inductive structural representation of the present invention;
Fig. 4 is the equivalent circuit diagram of series resonant converter of the present invention;
Fig. 5 is the three-dimensional figure of the gain curve of resonant network of the present invention;
Fig. 6 is three-dimensional two figure of the gain curve of resonant network of the present invention;
Fig. 7 is the gain curve X-Y scheme of resonant network of the present invention;
Fig. 8 is the resonant capacitance voltage curve of resonant network of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
In Fig. 1 ~ 2, a kind ofly determine frequency series resonant converter based on plate inductance, comprise by input DC power 1 and output loading 6, and between the two connect inverter circuit 2, resonant circuit 3, transformer 4, current rectifying and wave filtering circuit 5 and feedback control circuit 7 form, described inverter circuit adopts by switching tube M 1, switching tube M 2, capacitor C 1and capacitor C 2the half-bridge inversion circuit of composition, by the control signal driving switch pipe M of fixed frequency 1, switching tube M 2complementary break-make, complete DC inverter and become alternating current; Described resonant circuit is by resonant inductance L 1with resonance capacitor C 3form; Described transformer T 1be made up of magnetic core, former limit winding, secondary winding, core material is selected soft magnetic ferrite, and former limit winding, by enamelled wire coiling, connects resonant circuit and inverter circuit and forms series resonance network, and secondary winding, by enamelled wire coiling, connects current rectifying and wave filtering circuit; Described current rectifying and wave filtering circuit is by diode D 1, diode D 2, diode D 3, diode D 4with output capacitance C 4form full-bridge rectification filter circuit, this current rectifying and wave filtering circuit input connection transformer T 1secondary, output connects output loading R 1, alternating current is transformed into direct current and forms output Uout; The input of feedback control circuit connects output Uout, and the FEEDBACK CONTROL coil L2 of feedback control circuit is connected to resonant circuit, feedback signal.
Resonant inductance L as shown in Figure 3 1adopt plate induction structure, this structure is by the flat plate type magnetic core with borehole structure, resonant inductance L 1, FEEDBACK CONTROL coil L 2form, flat plate type magnetic core is by passing through resonant inductance L 1two row circular holes 8 and one by FEEDBACK CONTROL coil L 2circular hole 9 form, by resonant inductance L 1two row circular holes 8 symmetrical about flat plate type magnetic core center line, by FEEDBACK CONTROL coil L 2circular hole 9 be distributed on the center line of flat plate type magnetic core edge, resonant inductance L 1coil along same coiling direction in turn through two row circular holes, FEEDBACK CONTROL coil L 2vertical through circular hole, and by resonant inductance L 1the edge of circular hole have gap 10.
Feedback control circuit at least comprises the PI control circuit, PID regulating circuit and the FEEDBACK CONTROL coil L that connect by circuit 2, the second resistance R 2one end connect described output Uout, the other end connects tie point E; The 3rd resistance R 3one end connect tie point E, the other end connects place G 1; PI control circuit is by the 4th resistance R 4with the 5th capacitor C 5the composition that is connected in parallel, one end of described PI control circuit connects tie point E, and the other end connects tie point F; PID regulating circuit is by the 5th resistance R 5, the 6th capacitor C 6with the 7th capacitor C 7composition, the 5th resistance R 5with the 6th capacitor C 6after being connected in series again with the 7th capacitor C 7be connected in parallel, one end of described PID regulating circuit connects tie point F, and the other end connects tie point H; The 6th resistance R 6one end connect output Uout, the other end connects tie point H;
The negative electrode of chip TL431 connects tie point H, anodic bonding earth point G 1, connect tie point F with reference to the utmost point; The 7th resistance R 7one end connect output Uout, other end connecting triode Q 1collector electrode, described triode Q 1base stage connect tie point H, this triode Q 1emitter connect voltage-stabiliser tube D 5negative electrode, voltage-stabiliser tube D 5anodic bonding tie point N, the 8th resistance R 8one end connect tie point N, the other end connects earth point G 1; The 9th resistance R 9one end connect tie point N, other end connecting triode Q 2base stage, triode Q 2emitter connect the output first port A of feedback control circuit; The tenth resistance R 10connecting triode Q 2collector electrode, the other end connects output Uout, and the output second port B of feedback control circuit connects earth point G 1; The output first port A of described feedback control circuit is connected respectively the FEEDBACK CONTROL coil L of plate inductance with output the second port B 2two ends.
In embodiments of the invention, described plate induction structure is realized and is controlled resonant inductance L 1the principle of inductance value is: according to the has and distribution rule of magnetic flux, along with FEEDBACK CONTROL coil L 2in control electric current I C change, its magnetic flux around also will change thereupon, affect resonant inductance L 1former magnetic flux distribution, and then cause the inductance value of plate inductance to change; Under normal circumstances, the magnetic hysteresis loop of Ferrite Material is very long and narrow, easily saturated when work, as FEEDBACK CONTROL coil L 2in control electric current I C while making its Flux saturation around, will be similar to out the state of air gap herein, inductance value will reach minimum value; As resonant inductance L 1in the electric current that flows through increase, can cause inductive magnetic flux saturated, inductance value reduces.
The present invention can be divided into three aspects with the flat plate type magnetic core design of borehole structure and realize:
A, flow through and control the position, hole of electric current
Flow through the position, hole of controlling electric current, namely, by FEEDBACK CONTROL coil L 2the position of circular hole on flat plate type magnetic core; According to the regularity of distribution of magnetic flux, by FEEDBACK CONTROL coil L 2circular hole be distributed on the center line of rectangular flat type magnetic core, this circular hole distance edge line relative distance vertical from center line is different, can affect inductance coil L 1former magnetic flux distribution, and then affect the inductance value of plate induction structure;
B, flow through and control the size and number of current apertures
Flow through the size and number of controlling current apertures, namely, by FEEDBACK CONTROL coil L 2the size and number of circular hole on flat plate type magnetic core; According to the regularity of distribution of magnetic flux, by FEEDBACK CONTROL coil L 2circular hole be distributed in size or the quantity difference on rectangular flat type magnetic core, can affect resonant inductance L 1former magnetic flux distribution, and then affect the inductance value of plate inductance;
C, the design of opening air gap by the circular of inductance coil
By resonant inductance L 1circular crack after gap, change in the Distribution of Magnetic Field of circular, according to Ampere circuit law, the equivalent permeability of circular magnetic circuit reduces, circular magnetic circuit magnetic flux density diminishes, thereby the core loss of circular is reduced, and resonant inductance L 1inductance value also reduce.
The present invention proposes a kind of fixed method for designing of series resonant converter frequently, fixed series resonant converter method for designing is frequently: given circuit operating frequency fs, utilize the given electric parameter of circuit, and design the resonant element parameter value of series resonant converter; By regulating the inductance value of plate induction structure, the resonance point of series resonant converter is changed, and then change the voltage gain of series resonant converter resonant network while working in fs place, finally the direct voltage of regulating load output, realizes voltage stabilizing function.The fixed design of series resonant converter frequently idiographic flow is:
A. given electric parameter
Given: operating frequency fs, output voltage U out, power output excursion, input voltage range;
B. make resonant network gain curve
In Fig. 4, described fixed series resonant converter frequently adopts the analysis of the first-harmonic method of equal effect to make equivalent electric circuit, and equivalent electric circuit is made up of 1 input voltage source VAC, resonant inductance Lr, resonant capacitance Cr and load resistance Req, and the output voltage gain function of resonant network is
In Fig. 5, use Matlab software emulation to make the resonant network gain curve about resonant inductance (Lr) and resonant capacitance (Cr);
C. selective resonance network gain excursion
According to change range of input voltage, when input voltage hour, resonant network works in gain maximum, resonant network working point will be as far as possible near resonance point and work in ZVS region, meet
Choosing voltage gain is herein 1, by transformer voltage ratio formula
Can calculate transformer voltage ratio, now resonant inductance (Lr) value is minimum; When input voltage maximum, and now when light load condition, resonant network works in the minimum place of gain,
In Fig. 6 or Fig. 7, from graphics, choose the many groups resonant inductance (Lr) and resonant capacitance (Cr) value that meet minimum and maximum yield value, and present in X-Y scheme;
D. make the voltage curve of resonant capacitance (Cr)
to resonant network Analysis of Equivalent Circuit, according to the voltage equation of resonant capacitance (Cr)
In Fig. 8, use Matlab software to make resonant capacitance (Cr) voltage curve about resonant inductance (Lr) and resonant capacitance (Cr);
E. select optimum resonant capacitance (Cr) value and other parameter values of resonant network
Analyze resonant capacitance voltage curve and meet resonant inductance (Lr)-resonant capacitance (Cr) curve that resonant network gain requires, making tradeoff design aspect resonant element volume size, controlled resonant converter efficiency and resonant capacitance (Cr) stress, select resonant capacitance (Cr) value; Can solve resonant inductance (Lr) excursion, the quality factor of resonant circuit.
F. resonant network parameter optimization
Analyze experimental data, consider and optimize resonant network design.
Described feedback control network operation principle is:
Feedback control network sampled voltage is from main circuit output end voltage Uout, and in the time that main circuit output end voltage Uout changes, flow through feedback control network and export the electric current of the first port A and change, thus FEEDBACK CONTROL coil L 2in control electric current I C change, cause plate inductance inductance value change; On the other hand, in the time that main circuit output end voltage Uout changes, load output current changes thereupon, according to series resonant converter operating characteristic, flows through resonant inductance L in plate inductance 1also respective change of electric current, thereby the Flux saturation degree in plate inductance changes, cause plate inductance inductance value change; Specifically, can be divided into two kinds of mode of operation pattern analyses:
A. in the time that the input terminal voltage Vin of main circuit reduces (or increase), cause main circuit output end voltage Uout to reduce (or increase);
FEEDBACK CONTROL coil L 2positive feedback Principles of Regulation: in the time that the input terminal voltage Vin of main circuit reduces (or increase), main circuit output end voltage Uout reduces (or increase), and main circuit output end current reduces (or increase), resonant inductance L 1former Flux saturation degree dies down (or by force), cause the inductance value of plate inductance to increase (or reducing), the resonance point of series resonant converter move to left (or moving to right), when series resonant converter works in fs place, the voltage gain of resonant network reduces (or increase), will cause main circuit output end voltage Uout to reduce (or increase);
FEEDBACK CONTROL coil L 2negative feedback Principles of Regulation: in the time that the input terminal voltage (Vin) of main circuit reduces (or increase), main circuit output end voltage Uout reduces (or increase), the input terminal voltage that is feedback network reduces (or increase), causing flowing through feedback control network exports the electric current of the first port (A) and increases (or reducing), FEEDBACK CONTROL coil L 2in control electric current I C increase (or reducing) make resonant inductance L 1former Flux saturation degree grow (or weak), cause the inductance value of plate inductance to reduce (or increase), the resonance point of series resonant converter move to right (or moving to left), when series resonant converter works in fs place, the voltage gain of resonant network increases (or reducing), finally realizes main circuit output end voltage Uout and increases (or reducing).
B. when the output loading of main circuit alleviates (or increasing the weight of), when series resonant converter works in fs place, the voltage gain of resonant network increases (or reducing), causes main circuit output end voltage (Uout) to increase (or reducing);
FEEDBACK CONTROL coil L 2negative feedback Principles of Regulation: when the output loading of main circuit alleviates (or increasing the weight of), main circuit output end current reduces (or increase), resonant inductance L 1former Flux saturation degree dies down (or by force), cause the inductance value of plate inductance to increase (or reducing), the resonance point of series resonant converter move to left (or moving to right), when series resonant converter works in fs place, the voltage gain of resonant network reduces (or increase), finally realizes main circuit output end voltage (Uout) and reduces (or increase);
FEEDBACK CONTROL coil L 2negative feedback Principles of Regulation: in the time that the output loading of main circuit alleviates (or increasing the weight of), when series resonant converter works in fs place, the voltage gain of resonant network increases (or reducing), cause main circuit output end voltage Uout to increase (or reducing), the input terminal voltage that is feedback network increases (or reducing), causing flowing through feedback control network exports the electric current of the first port A and reduces (or increase), FEEDBACK CONTROL coil L 2in control electric current I C reduce (or increase) and make resonant inductance L 1former Flux saturation degree dies down (or by force), cause the inductance value of plate inductance to increase (or reducing), the resonance point of series resonant converter move to left (or moving to right), when series resonant converter works in fs place, the voltage gain of resonant network reduces (or increase), finally realizes main circuit output end voltage Uout and reduces (or increase).。
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.

Claims (4)

  1. Based on plate inductance determine a frequency series resonant converter, it is characterized in that: comprise by inverter circuit, resonant circuit, transformer, current rectifying and wave filtering circuit and feedback control circuit and forming,
    Described inverter circuit adopts by switching tube M 1, switching tube M 2, capacitor C 1and capacitor C 2the half-bridge inversion circuit of composition, by the control signal driving switch pipe M of fixed frequency 1, switching tube M 2complementary break-make, complete DC inverter and become alternating current;
    Described resonant circuit is by resonant inductance L 1with resonance capacitor C 3form;
    Described transformer T 1be made up of magnetic core, former limit winding, secondary winding, core material is selected soft magnetic ferrite, and former limit winding, by enamelled wire coiling, connects resonant circuit and inverter circuit and forms series resonance network, and secondary winding, by enamelled wire coiling, connects current rectifying and wave filtering circuit;
    Described current rectifying and wave filtering circuit is by diode D 1, diode D 2, diode D 3, diode D 4with output capacitance C 4form full-bridge rectification filter circuit, this current rectifying and wave filtering circuit input connection transformer T 1secondary, output connects output loading R 1, alternating current is transformed into direct current and forms output Uout;
    The input of feedback control circuit connects output Uout, and the FEEDBACK CONTROL coil L2 of feedback control circuit is connected to resonant circuit.
  2. As claimed in claim 1 a kind of based on plate inductance determine frequency series resonant converter, it is characterized in that described resonant inductance L 1adopt plate induction structure, this structure is by the flat plate type magnetic core with borehole structure, resonant inductance L 1, FEEDBACK CONTROL coil L 2form, flat plate type magnetic core is by passing through resonant inductance L 1two row circular holes and one by FEEDBACK CONTROL coil L 2circular hole form, by resonant inductance L 1two row circular holes symmetrical about flat plate type magnetic core center line, by FEEDBACK CONTROL coil L 2circular hole be distributed on the center line of flat plate type magnetic core edge, resonant inductance L 1coil along same coiling direction in turn through two row circular holes, FEEDBACK CONTROL coil L 2vertical through circular hole.
  3. As claimed in claim 2 a kind of based on plate inductance determine frequency series resonant converter, it is characterized in that, by resonant inductance L 1the edge of circular hole have gap.
  4. As claimed in claim 1 a kind of based on plate inductance determine frequency series resonant converter, it is characterized in that, feedback control circuit at least comprises the PI control circuit, PID regulating circuit and the FEEDBACK CONTROL coil L that connect by circuit 2, the second resistance R 2one end connect described output Uout, the other end connects tie point E; The 3rd resistance R 3one end connect tie point E, the other end connects place G 1;
    PI control circuit is by the 4th resistance R 4with the 5th capacitor C 5the composition that is connected in parallel, one end of described PI control circuit connects tie point E, and the other end connects tie point F;
    PID regulating circuit is by the 5th resistance R 5, the 6th capacitor C 6with the 7th capacitor C 7composition, the 5th resistance R 5with the 6th capacitor C 6after being connected in series again with the 7th capacitor C 7be connected in parallel, one end of described PID regulating circuit connects tie point F, and the other end connects tie point H; The 6th resistance R 6one end connect output Uout, the other end connects tie point H;
    The negative electrode of chip TL431 connects tie point H, anodic bonding earth point G 1, connect tie point F with reference to the utmost point; The 7th resistance R 7one end connect output Uout, other end connecting triode Q 1collector electrode, described triode Q 1base stage connect tie point H, this triode Q 1emitter connect voltage-stabiliser tube D 5negative electrode, voltage-stabiliser tube D 5anodic bonding tie point N, the 8th resistance R 8one end connect tie point N, the other end connects earth point G 1; The 9th resistance R 9one end connect tie point N, other end connecting triode Q 2base stage, triode Q 2emitter connect the output first port A of feedback control circuit; The tenth resistance R 10connecting triode Q 2collector electrode, the other end connects output Uout, and the output second port B of feedback control circuit connects earth point G 1; The output first port A of described feedback control circuit is connected respectively the FEEDBACK CONTROL coil L of plate inductance with output the second port B 2two ends.
CN201410249220.8A 2014-06-09 2014-06-09 Fixed-frequency series resonant converter based on flat inductor Pending CN103997217A (en)

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CN106683851A (en) * 2017-02-09 2017-05-17 成都祥和云端节能设备集团有限公司 Safe and energy-efficient type system transformer
CN109348559A (en) * 2018-09-20 2019-02-15 中国空气动力研究与发展中心超高速空气动力研究所 The frequency selection circuit and frequency-selecting method of high-power high-frequency induction heating power
CN112269050A (en) * 2020-10-16 2021-01-26 国网河北省电力有限公司雄安新区供电公司 LC resonance fluxgate leakage current detection method for inhibiting modulation ripple

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CN103078472A (en) * 2012-10-25 2013-05-01 中国船舶重工集团公司第七二三研究所 Integrated integration method for magnetic assembly of high-voltage power supply of microwave power module
CN103368404A (en) * 2013-08-02 2013-10-23 陶顺祝 Integrated inductor resonant converter

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106683851A (en) * 2017-02-09 2017-05-17 成都祥和云端节能设备集团有限公司 Safe and energy-efficient type system transformer
CN109348559A (en) * 2018-09-20 2019-02-15 中国空气动力研究与发展中心超高速空气动力研究所 The frequency selection circuit and frequency-selecting method of high-power high-frequency induction heating power
CN109348559B (en) * 2018-09-20 2019-08-23 中国空气动力研究与发展中心超高速空气动力研究所 The frequency selection circuit and frequency-selecting method of high-power high-frequency induction heating power
CN112269050A (en) * 2020-10-16 2021-01-26 国网河北省电力有限公司雄安新区供电公司 LC resonance fluxgate leakage current detection method for inhibiting modulation ripple

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Application publication date: 20140820