CN104914812A - Acquisition control method for LLC circuit - Google Patents
Acquisition control method for LLC circuit Download PDFInfo
- Publication number
- CN104914812A CN104914812A CN201510173297.6A CN201510173297A CN104914812A CN 104914812 A CN104914812 A CN 104914812A CN 201510173297 A CN201510173297 A CN 201510173297A CN 104914812 A CN104914812 A CN 104914812A
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- Prior art keywords
- dsp
- output voltage
- llc
- control method
- conversion
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- 238000000034 method Methods 0.000 title claims abstract description 35
- 238000006243 chemical reaction Methods 0.000 claims abstract description 20
- 238000005070 sampling Methods 0.000 claims abstract description 13
- 238000001914 filtration Methods 0.000 claims abstract description 8
- 238000012546 transfer Methods 0.000 claims abstract description 5
- 238000012544 monitoring process Methods 0.000 claims abstract description 4
- 238000009825 accumulation Methods 0.000 claims description 6
- 230000010354 integration Effects 0.000 claims description 3
- 238000011002 quantification Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 description 5
- 230000001276 controlling effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/418—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM]
- G05B19/41835—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM] characterised by programme execution
-
- 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
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Quality & Reliability (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Ac-Ac Conversion (AREA)
Abstract
The invention discloses an acquisition control method for an LLC circuit. The acquisition control method is characterized in that the control method performs [delta]-[sigma]A/D sampling on an output voltage firstly to achieve acquisition, monitoring and A/D conversion of the output voltage, a DSP adjusts a [delta]-[sigma]A/D sampling speed, a parameter of a 2P2Z control transfer function is modified in real time through detection of the output voltage of the LLC circuit, compensation is performed on data after the [delta]-[sigma]A/D sampling, D/A conversion is performed on data after 2P2Z control through [delta]-[sigma]D/A conversion finally, and a drive signal of the LLC circuit is output in a filtering manner. The acquisition control method is advantageous in that 1, through the DSP, full digitalization of acquisition control of the LLC circuit is achieved, and cost of an LLC acquisition control circuit is reduced, 2, the speed and precision of output voltage acquisition and the speed of the precision of the A/D conversion are improved, and 3, rapid compensation and adjustments of the output voltage and a drive signal frequency are achieved, and the output voltage is stabilized.
Description
Technical field
The present invention relates to the technological improvement field of LLC circuit, particularly a kind of collection control method for LLC circuit.
Background technology
On market, the collection control of existing LLC circuit realizes mainly through simulation, there is the shortcomings such as components and parts temperature drift, aging, control method falls behind in this method, LLC circuit digital collection simultaneously controls also there is the problems such as A/D switching rate is slow, compensating circuit design is complicated, hinders the development of the collection control technology of LLC circuit.
For the problems referred to above, provide a kind of novel collection control method, realize the total digitalization that the collection of LLC circuit controls, improve picking rate and precision.
Summary of the invention
Technical matters to be solved by this invention is, provides a kind of collection control method for LLC circuit, realizes the total digitalization that the collection of LLC circuit controls, and reaches the object improving picking rate and precision.
For achieving the above object, technical scheme of the present invention is, a kind of collection control method for LLC circuit, is characterized in that: first described control method is carried out △-Σ A/D to output voltage and sampled, and realizes the collection of output voltage, monitoring and A/D conversion; And DSP regulates the speed of △-Σ A/D sampling; Control the parameter of transport function by detecting LLC circuit output voltage real time modifying 2P2Z, the data after △-Σ A/D samples are compensated; Data after finally controlling for 2P2Z carry out the drive singal of D/A conversion, filtering output LLC circuit through △-Σ D/A process.
Described △-Σ A/D is sampled as LLC output voltage U
othrough anti-aliasing interference filter and feedback signal U
fbafter accumulation process, DSP, according to accumulation process signal amplitude setting storage gain parameter a, obtains 1bit digital signal after integration, delay process, quantification; After A/D conversion figure place reaches n position, then stop A/D conversion, after digital filtering, obtain sampled output signal U
s.
Described 2P2Z controls first by sampled output signal U
s(Z) the reference voltage U set with DSP
ref(Z) obtain error signal E (Z) more afterwards, DSP is according to U
s(Z) 2P2Z transport function is obtained with E (Z) numerical value
dSP judges transport function zone bit.When zone bit is 0, transport function is optimized, until DSP judges that its zone bit is as 1; After zone bit judgement terminates, DSP exports U according to sampling
samendment load transfer function coefficient, compensates LLC output voltage U
o, regulate LLC driving signal frequency.
For a collection control method for LLC circuit, owing to adopting above-mentioned method, the invention has the advantages that: 1, realized by DSP, achieve the total digitalization that the collection of LLC circuit controls, reduce the cost of LLC acquisition control circuit.2, improve output voltage collection, A/D conversion speed and precision.3, the quick compensation to output voltage, driving signal frequency and adjustment is realized, regulated output voltage.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation;
Fig. 1 is a kind of algorithm flow chart of sampling for △-Σ A/D in the collection control method of LLC circuit of the present invention;
Fig. 2 is a kind of algorithm flow chart controlled for 2P2Z in the collection control method of LLC circuit of the present invention;
Fig. 3 is the algorithm flow chart of a kind of collection control method for LLC circuit of the present invention.
Embodiment
The present invention includes △-Σ A/D sampling, 2P2Z controls, △-Σ D/A tri-processes.△-Σ A/D sampling process realizes the collection of output voltage, monitoring and A/D conversion, △-Σ sample rate is regulated, the problem such as can effectively avoid the components and parts temperature of simulated sample mode to float and digital sample mode sample rate is slow in the past, precision is not high by DSP; 2P2Z control procedure compensates design to the data after △-Σ A/D sampling, controlling the parameter of transport function, carrying out frequency adjustment, reach the effect of regulated output voltage to LLC current driving signal by detecting LLC circuit output voltage real time modifying 2P2Z; △-Σ D/A process carries out D/A conversion, filtering to the data after 2P2Z control, and it exports the drive singal as LLC circuit.
Fig. 1 is △-Σ sampling algorithm process flow diagram of the present invention, LLC output voltage U
othrough anti-aliasing interference filter and feedback signal U
fbafter accumulation process, DSP, according to accumulation process signal amplitude setting storage gain parameter a, obtains 1bit digital signal after integration, delay process, quantification.When A/D change figure place reach n position after (wherein n preset into DSP A/D conversion accuracy), then stop A/D conversion, after digital filtering, obtain sampled output signal U
s.
Fig. 2 is 2P2Z control algolithm process flow diagram of the present invention, by sampled output signal U
s(Z) the reference voltage U set with DSP
ref(Z) obtain error signal E (Z) more afterwards, DSP is according to U
s(Z) 2P2Z transport function is obtained with E (Z) numerical value
to transport function zone bit, (zone bit is sampled signal U in transfer function fitting process to DSP
s(Z) with DSP reference signal U
ref(Z) scalarization of departure degree represents, 1 represents departure degree within the scope of permissible value, and 0 represents departure degree surmounts DSP setting permissible value) judge.When zone bit is 0, transport function is optimized, until DSP judges that its zone bit is as 1.After zone bit judgement terminates, DSP exports U according to sampling
samendment load transfer function coefficient, compensates LLC output voltage U
o, regulate LLC driving signal frequency.
Fig. 3 is algorithm flow chart of the present invention, and specific works flow process is as described below: △-Σ A/D samples to LLC circuit output voltage U
ogather, the reference voltage that the voltage data collected and DSP are arranged is compared, if the maximum reference voltage level U set more than DSP
max, LLC circuit quits work, otherwise carries out A/D conversion to voltage data; After △-Σ A/D samples, 2P2Z controls the data U to △-Σ A/D sample conversion
othe reference voltage V that sets is controlled with 2P2Z
refcompare, if U
o≠ V
ref, DSP regulates the parameter that 2P2Z controls in transport function, compensates LLC current driving signal, reaches the effect regulating driving signal frequency, regulated output voltage; △-Σ D/A carries out D/A conversion and filtering to the digital drive signals after 2P2Z control and compensation, obtains the analog drive signal U of LLC circuit
in.
Above by reference to the accompanying drawings to invention has been exemplary description; obvious specific implementation of the present invention is not subject to the restrictions described above; as long as have employed the various improvement that technical solution of the present invention is carried out, or directly apply to other occasion, all within protection scope of the present invention without improving.
Claims (3)
1. for a collection control method for LLC circuit, it is characterized in that: first described control method is carried out △-Σ A/D to output voltage and sampled, realize the collection of output voltage, monitoring and A/D conversion; And DSP regulates the speed of △-Σ A/D sampling; Control the parameter of transport function by detecting LLC circuit output voltage real time modifying 2P2Z, the data after △-Σ A/D samples are compensated; Data after finally controlling for 2P2Z carry out the drive singal of D/A conversion, filtering output LLC circuit through △-Σ D/A process.
2. a kind of collection control method for LLC circuit according to claim 1, is characterized in that: described △-Σ A/D is sampled as LLC output voltage U
othrough anti-aliasing interference filter and feedback signal U
fbafter accumulation process, DSP, according to accumulation process signal amplitude setting storage gain parameter a, obtains 1bit digital signal after integration, delay process, quantification; After A/D conversion figure place reaches n position, then stop A/D conversion, after digital filtering, obtain sampled output signal U
s.
3. a kind of collection control method for LLC circuit according to claim 1, is characterized in that: described 2P2Z controls first by sampled output signal U
s(Z) the reference voltage U set with DSP
ref(Z) obtain error signal E (Z) more afterwards, DSP is according to U
s(Z) 2P2Z transport function is obtained with E (Z) numerical value
dSP judges transport function zone bit.When zone bit is 0, transport function is optimized, until DSP judges that its zone bit is as 1; After zone bit judgement terminates, DSP exports U according to sampling
samendment load transfer function coefficient, compensates LLC output voltage U
o, regulate LLC driving signal frequency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510173297.6A CN104914812A (en) | 2015-04-13 | 2015-04-13 | Acquisition control method for LLC circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510173297.6A CN104914812A (en) | 2015-04-13 | 2015-04-13 | Acquisition control method for LLC circuit |
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| CN104914812A true CN104914812A (en) | 2015-09-16 |
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|---|---|---|---|
| CN201510173297.6A Pending CN104914812A (en) | 2015-04-13 | 2015-04-13 | Acquisition control method for LLC circuit |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004208382A (en) * | 2002-12-25 | 2004-07-22 | Matsushita Electric Ind Co Ltd | Switching power supply device |
| CN102355147A (en) * | 2011-10-28 | 2012-02-15 | 上海大学 | Digital control device and method for LLC (logical link control) synchronously-rectified resonant converter |
| CN102857109A (en) * | 2012-08-28 | 2013-01-02 | 华南理工大学 | High-power LLC (logical link control) resonant full-bridge converter based on DSP (digital signal processor) |
| CN103078492A (en) * | 2011-10-26 | 2013-05-01 | 中兴通讯股份有限公司 | Method and device for controlling resonant converter |
-
2015
- 2015-04-13 CN CN201510173297.6A patent/CN104914812A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004208382A (en) * | 2002-12-25 | 2004-07-22 | Matsushita Electric Ind Co Ltd | Switching power supply device |
| CN103078492A (en) * | 2011-10-26 | 2013-05-01 | 中兴通讯股份有限公司 | Method and device for controlling resonant converter |
| CN102355147A (en) * | 2011-10-28 | 2012-02-15 | 上海大学 | Digital control device and method for LLC (logical link control) synchronously-rectified resonant converter |
| CN102857109A (en) * | 2012-08-28 | 2013-01-02 | 华南理工大学 | High-power LLC (logical link control) resonant full-bridge converter based on DSP (digital signal processor) |
Non-Patent Citations (1)
| Title |
|---|
| 袁子龙: "△-ΣA/D转换技术及在地震勘探中的应用", 《地球物理学进展》 * |
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Application publication date: 20150916 |
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