CN206117492U - Resonant control circuit - Google Patents
Resonant control circuit Download PDFInfo
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- CN206117492U CN206117492U CN201620757176.6U CN201620757176U CN206117492U CN 206117492 U CN206117492 U CN 206117492U CN 201620757176 U CN201620757176 U CN 201620757176U CN 206117492 U CN206117492 U CN 206117492U
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- circuit
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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 belongs to a resonance circuit, concretely relates to resonant control circuit, including pulsewidth modulation control circuit, power conversion circuit, current sampling circuit and voltage sampling circuit, pulsewidth modulation control circuit, current sampling circuit and voltage sampling circuit are connected with power conversion circuit electricity respectively, current sampling circuit can send the current signal of sampling to pulsewidth modulation control circuit. Pulsewidth modulation (PWM) control circuit carries out current sample through current sampling circuit, and PWM control circuit is sent to the current signal of each on off cycle that will sample to realize that current mode pursues ripples control, reaches the purpose that reduces switching power supply output voltage ripple and improve dynamic response.
Description
Technical field
This utility model belongs to a kind of resonance circuit, and in particular to a kind of resonant control circuit.
Background technology
Existing resonant control circuit is voltage control, but voltage-controlled resonance circuit has following problems：
First, transient response is slow (slow to the change dynamic response of input voltage)
When input voltage diminishes suddenly or load impedance becomes suddenly hour because main circuit have larger output capacitance C and
Inductance L phase shift time-lag actions, also time delay is delayed for the change of output voltage, can just reach PWM comparators and do pulsewidth or frequency accordingly
Change.The two time delay hysteresises are the slow main causes of transient response；
2nd, COMPENSATION NETWORK DESIGN became complex originally, and closed loop gain changes with input voltage makes its increasingly complex, defeated
Go out LC wave filter and increased duopole to control ring, in Compensation Design error amplifier, need the low low cut of dominant pole,
Or one zero point of increase is compensated；
3rd, because transient response is slow and duopole control is caused, LLC resonance circuits no matter half-bridge or full-bridge circuit are defeated
Going out cannot eliminate the ripple of 50Hz and 100Hz.So that the intrinsic working frequency ripple wave of circuit, the ripple frequency be mains frequency or
2 times of mains frequency.
Utility model content
The purpose of this utility model is：For the deficiencies in the prior art, there is provided a kind of resonant control circuit, its purpose exists
In the ripple for eliminating 50Hz and 100Hz in circuit.
To achieve these goals, this utility model is adopted the following technical scheme that：
A kind of resonant control circuit, including control circuit for pulse-width modulation, power conversion circuit, current sampling circuit and voltage
Sample circuit, the control circuit for pulse-width modulation, current sampling circuit and voltage sampling circuit are electric with power conversion circuit respectively
Connection, the current sampling circuit includes the electric capacity C10 and C8 of series connection, and the current sampling circuit can be by the electric current for sampling
Signal is sent to control circuit for pulse-width modulation.Pulsewidth modulation (PWM) control circuit carries out current sample by current sampling circuit, will
The current signal of each switch periods for sampling is sent to pwm control circuit, is reached with realizing current-mode by ripple control
Reduce switch power source output voltage ripple and improve the purpose of dynamic response.
Used as a kind of improvement of resonant control circuit of this utility model, the control circuit for pulse-width modulation includes control core
Piece, the control chip is current-mode control chip.
The beneficial effects of the utility model are：A kind of resonant control circuit, including the change of control circuit for pulse-width modulation, power
Change circuit, current sampling circuit and voltage sampling circuit, the control circuit for pulse-width modulation, current sampling circuit and voltage sample
Circuit is electrically connected respectively with power conversion circuit, and the current sampling circuit includes the electric capacity C10 and C8 of series connection, and the electric current is adopted
The current signal for sampling can be sent to control circuit for pulse-width modulation by sample circuit.Pulsewidth modulation (PWM) control circuit is by electricity
Stream sample circuit carries out current sample, the current signal of each switch periods for sampling is sent to into pwm control circuit, with reality
The purpose that existing current-mode reduces switch power source output voltage ripple and improve dynamic response by ripple control.Current-mode
Formula controls advantage by ripple：Dynamic Closed Loop response is fast, equal to the change dynamic response of change and the output loading of input voltage
Better than voltage mode, in inherently pulse current-limiting function and instantaneous peak current current-limiting function one by one in current-mode.Its dynamic is rung
Ying Kuaike solves working frequency ripple wave control problem with perfect, has the advantage that Switching Power Supply is easily designed.
Description of the drawings
Fig. 1 is a kind of resonant control circuit of the present utility model.
Fig. 2 is this utility model current-mode by ripple control principle drawing.
Fig. 3 is the internal frame diagram of this utility model control chip.
Specific embodiment
This utility model and its advantage are made further in detail below in conjunction with specific embodiment and Figure of description
Describe in detail it is bright, but, specific embodiment of the present utility model is not limited thereto.
As shown in Fig. 1 to 3, a kind of resonant control circuit, including control circuit for pulse-width modulation, power conversion circuit, electric current
Sample circuit and voltage sampling circuit, the control circuit for pulse-width modulation, current sampling circuit and voltage sampling circuit respectively with
Power conversion circuit is electrically connected, and the current sampling circuit includes the electric capacity C10 and C8 of series connection, and the current sampling circuit can
The current signal for sampling is sent to into control circuit for pulse-width modulation.The control circuit for pulse-width modulation includes control chip, described
Control chip is current-mode control chip.
Pulsewidth modulation (PWM) control circuit carries out current sample by current sampling circuit, by sample each open
The current signal in pass cycle is sent to pwm control circuit, and to realize current-mode by ripple control Switching Power Supply output is reduced
The purpose of voltage ripple and raising dynamic response.The current signal for sampling is sent into into control circuit for pulse-width modulation, its error electricity
After pressure signal Ue delivers to PWM relatively, and the wavy voltage ramp of fixed triangle produced with oscillating circuit not as voltage mode
Relatively, the triangular waveform or trapezoidal wedge angle ripple synthesized waveform signal of output peak value but is represented with its peak value of a change
U ∑s compare, and then obtain the pwm pulse shut-off moment.Therefore electric current (peak value) Schema control is not direct with voltage error signal
Control PWM frequency, but the inductive current size of peak value outlet side is directly controlled, then it is indirectly controlled PWM changes.
Current-mode controls advantage by ripple：Dynamic Closed Loop response is fast, the change and output loading to input voltage
Change dynamic response is superior to voltage mode, in inherently pulse current-limiting function and instantaneous peak current current limliting one by one in current-mode
Function.Its dynamic response can solve working frequency ripple wave control problem with perfect soon, have the advantage that Switching Power Supply is easily designed.
The announcement and teaching of book according to the above description, this utility model those skilled in the art can also be to above-mentioned reality
The mode of applying is changed and changed.Therefore, this utility model is not limited to above-mentioned specific embodiment, every this area skill
Art personnel on the basis of this utility model it is done it is any conspicuously improved, replace or modification belongs to this practicality newly
The protection domain of type.Although additionally, some specific terms used in this specification, these terms are intended merely to convenient saying
It is bright, any restriction is not constituted to this utility model.
Claims (3)
1. a kind of resonant control circuit, it is characterised in that：Including control circuit for pulse-width modulation, power conversion circuit, current sample
Circuit and voltage sampling circuit, the control circuit for pulse-width modulation, current sampling circuit and voltage sampling circuit respectively with power
Translation circuit is electrically connected, and the current signal for sampling can be sent to control circuit for pulse-width modulation by the current sampling circuit.
2. a kind of resonant control circuit according to claim 1, it is characterised in that：The control circuit for pulse-width modulation includes
Control chip, the control chip is current-mode control chip.
3. a kind of resonant control circuit according to claim 1, it is characterised in that：The current sampling circuit includes series connection
Electric capacity C10 and C8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620757176.6U CN206117492U (en) | 2016-07-15 | 2016-07-15 | Resonant control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620757176.6U CN206117492U (en) | 2016-07-15 | 2016-07-15 | Resonant control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206117492U true CN206117492U (en) | 2017-04-19 |
Family
ID=58510874
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620757176.6U Active CN206117492U (en) | 2016-07-15 | 2016-07-15 | Resonant control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206117492U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106059274A (en) * | 2016-07-15 | 2016-10-26 | 东莞市米町源电子科技有限公司 | Resonant control circuit |
| CN108900080A (en) * | 2018-07-12 | 2018-11-27 | 明纬(广州)电子有限公司 | Resonance control apparatus |
| CN110247615A (en) * | 2018-03-09 | 2019-09-17 | 深圳市蓝海华腾技术股份有限公司 | Wave limiting control system, method and electric machine controller based on dsp chip |
-
2016
- 2016-07-15 CN CN201620757176.6U patent/CN206117492U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106059274A (en) * | 2016-07-15 | 2016-10-26 | 东莞市米町源电子科技有限公司 | Resonant control circuit |
| CN110247615A (en) * | 2018-03-09 | 2019-09-17 | 深圳市蓝海华腾技术股份有限公司 | Wave limiting control system, method and electric machine controller based on dsp chip |
| CN110247615B (en) * | 2018-03-09 | 2024-04-12 | 深圳市蓝海华腾技术股份有限公司 | Wave-by-wave current limiting control system and method based on DSP chip and motor controller |
| CN108900080A (en) * | 2018-07-12 | 2018-11-27 | 明纬(广州)电子有限公司 | Resonance control apparatus |
| CN108900080B (en) * | 2018-07-12 | 2019-11-05 | 明纬(广州)电子有限公司 | Resonance control apparatus |
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