CN107741572A - A kind of appraisal procedure of Switching Power Supply load capacitance equivalent resistance - Google Patents
A kind of appraisal procedure of Switching Power Supply load capacitance equivalent resistance Download PDFInfo
- Publication number
- CN107741572A CN107741572A CN201710846522.7A CN201710846522A CN107741572A CN 107741572 A CN107741572 A CN 107741572A CN 201710846522 A CN201710846522 A CN 201710846522A CN 107741572 A CN107741572 A CN 107741572A
- Authority
- CN
- China
- Prior art keywords
- mrow
- msub
- series resistance
- equivalent series
- mover
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/40—Testing power supplies
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Secondary Cells (AREA)
Abstract
The present invention relates to electronics assessment technology, more specifically, discloses a kind of appraisal procedure of Switching Power Supply load capacitance equivalent series resistance, it comprises the following steps：Capacitance voltage and inductive current are measured, obtains N group measurement data；Build calculation matrix；Utilize the load capacitance ESR calculation of initial value initial optimization estimates and broad sense noise power gain of preceding N ranks moment state；New capacitance voltage and inductive current calculated value are inputted, new equivalent series resistance assessed value is calculated using broad sense noise power gain and optimal estimating value；Broad sense noise power gain is updated, waits new data to arrive, repeat step S4, renewal calculates equivalent series resistance assessed value.The method that the algorithm employs finite response filtering, the accuracy requirement estimated in calculating process for system noise statistical distribution is low, avoids system noise modeling inaccuracy and causes big calculating deviation.
Description
Technical field
The present invention relates to electronics assessment technology, more specifically to a kind of Switching Power Supply load capacitance equivalent series resistance
Appraisal procedure.
Background technology
Switching Power Supply is the basis of electronic equipment normal work, is the heart of whole electronic system.Once event occurs for power supply
Barrier, whole electronic equipment can be caused to paralyse, its proper function can not be completed, or even cause huge economic loss and personnel to hinder
Die.With the quickening of information intelligence process, accounting of the electronic information in whole equipment is also continuously increased, therefore,
Requirement for Switching Power Supply Stability and dependability also more and more higher.However, because Switching Power Supply subjects maximum in system
Voltage and power, the part broken down often is easiest in whole system, so, to switch power module reliability protect
Barrier is significant to stablizing for system.
Electrochemical capacitor is fault rate highest part in whole switch power supply system, and more than 60% Switching Power Supply failure is equal
It is as caused by electrochemical capacitor.Electrochemical capacitor life is limited and much smaller than miscellaneous part in switch power supply system, is using process
The performance of middle electrochemical capacitor is constantly degenerated, until causing thrashing.Therefore, electrochemical capacitor performance in power-supply system is studied to move back
Change, specify its performance state, realize efficient monitoring, so as to avoid electrochemical capacitor from being influenceed caused by failing to electronic information
Guaranteed reliability is significant.The major degenerative of electrochemical capacitor is characterized as the reduction of its capacitance and equivalent series resistance
(Equivalent Series Resistance, ESR) increase, therefore the ESR of calculating electrochemical capacitor and capacitance are opened analysis
The state of powered-down source module is significant.
The content of the invention
The invention provides a kind of appraisal procedure of Switching Power Supply load capacitance equivalent resistance, ESR can be accurately assessed
Change, lifting ESR calculate robustness.
The present invention employs following technical scheme to solve the above problems：
A kind of appraisal procedure of Switching Power Supply load capacitance equivalent resistance, it is characterised in that comprise the following steps：
S1. capacitance voltage and inductive current are measured, obtains N group measurement data；
S2. calculation matrix is built；
S3. the load capacitance ESR calculation of initial value initial optimization estimates and broad sense noise work(of preceding N ranks moment state are utilized
Rate gain；
S4. new capacitance voltage and inductive current calculated value are inputted, utilizes broad sense noise power gain and optimal estimating value
Calculate new equivalent series resistance assessed value；
S5. broad sense noise power gain is updated, waits new data to arrive, repeat step S4, renewal calculates equivalent series electricity
Hinder assessed value.
Further, the step S1 is comprised the following specific steps that：
S11. the data window length for selecting unbiased finite impulse response filtering algorithm wave filter is N；
S12. N groups capacitance voltage and inductive current measured value are obtained；
Further, the method for calculation matrix is built in the step S2 to be included, and utilizes the capacitance voltage of measurement, inductance electricity
Relation between stream and load capacitance equivalent resistance establishes calculation matrix.
Further, initial optimization estimate and broad sense noise power gain computational methods are calculated such as in the step S3
Under：
Initial optimization calculation formula is expressed as：
Broad sense noise power gain calculation formula is：
GN=(CTC)-1。
Further, the step S4 Computational Methods are built using new capacitance voltage and inductive current measured value
New data matrix Yk, then broad sense noise power gain matrix is updated：
The iterative calculation equation of equivalent series resistance assessed value is：
Further, the step S5 is concretely comprised the following steps：
S51. the root mean square of the assessed value deviation at K moment is recorded：
S52. the broad sense noise power gain adjustment factor θ at kth moment is calculatedkIt is defined as：
S53. wait new measurement data to arrive, repeat S4-S5 steps, update equivalent series resistance assessed value.
Compared with prior art, beneficial effects of the present invention：
(1) it is used as broad sense noise power gain adjustment factor by defining measurement data and estimate deviation, dynamic is adjusted
Whole broad sense noise power gain, realizes the adaptability to different working conditions.
(2) electrochemical capacitor ESR is calculated using improvement UFIR filtering algorithms in real time, can avoided in advance to systematic survey noise
Characteristic models.
(3) being switched fast under different working conditions is realized by using accommodation coefficient of gain.
Brief description of the drawings
Fig. 1 is the flow chart of this appraisal procedure；
Fig. 2 is the circuit structure in embodiment.
Embodiment
The present invention is further described with reference to the accompanying drawings and detailed description：
With reference to figure 1, the invention provides a kind of Switching Power Supply load capacitance equivalent series resistance appraisal procedure, including it is following
Step：
S1. capacitance voltage and inductive current are measured, obtains N group measurement data；
S2. calculation matrix is built；
S3. using preceding N ranks moment state load capacitance equivalent series resistance calculation of initial value initial optimization estimate and
Broad sense noise power gain；
S4. new capacitance voltage and inductive current calculated value are inputted, utilizes broad sense noise power gain and optimal estimating value
Calculate new equivalent series resistance assessed value；
S5. broad sense noise power gain is updated, waits new data to arrive, repeat step S4, renewal calculates equivalent series electricity
Hinder assessed value.
Further, the step S1 is comprised the following specific steps that：
S11. the data window length for selecting unbiased finite impulse response filtering algorithm wave filter is N；
S12. N groups capacitance voltage and inductive current measured value are obtained.
Further, it is according to circuit structure that calculation matrix method is built in the step S2, utilizes the electric capacity electricity of measurement
Relation between pressure, inductive current and load capacitance equivalent resistance establishes calculation matrix.
Further, initial optimization estimate and broad sense noise power gain computational methods are calculated such as in the step S3
Under：
Initial optimization calculation formula is expressed as：
Wherein：C is calculation matrix, YNFor N groups capacitance voltage and inductive current measured value.
Broad sense noise power gain calculation formula is：
GN=(CTC)-1。
Further, in the step S4, circular is as follows：
Utilize new capacitance voltage and inductive current measured value structure new data matrix Yk, update broad sense noise power gain
Matrix：
Wherein：θkFor broad sense noise power gain adjustment factor, initial value 1.
The iterative calculation equation of equivalent series resistance assessed value is：
Wherein：For kth moment capacitor equivalent series resistance estimate,
Because when circuit is in different working condition, circuit power consumption is different, Switching Power Supply delivery efficiency is different, now line
Wave property can also have differences.In order to improve the flexibility of algorithm, the present embodiment is by defining measurement data and estimate deviation
Value is used as broad sense noise power gain adjustment factor, and dynamic adjusts broad sense noise power gain, realized to different working conditions
Adaptability.So further, the step S5 is concretely comprised the following steps：
S51. the root mean square of the assessed value deviation at K moment is recorded：
Wherein, β is the data dimension of assessed value.
S52. the broad sense noise power gain adjustment factor θ at kth moment is calculatedkIt is defined as：
S53. wait new measurement data to arrive, repeat S4-S5 steps, update equivalent series resistance assessed value.
If assessed value change of error is very big it can be seen from the formula in S51-S52, it is understood that there may be power condition changing feelings
Condition, broad sense noise power gain is now corrected, reduce assessed value error, if assessed value change of error very little, it is believed that assessed
As a result it is accurate, increase broad sense noise power gain, further speed up the convergence rate of filtering algorithm.
The present embodiment also further illustrates the good characteristic of the present invention using specific data, is Switching Power Supply with reference to figure 2,
The circuit includes control source Vin, switchs control pipe M1, diode D1, inductance L1, load capacitance C1, and load R1 is formed, and its is defeated
It is 100V, output voltage 12V, inductance L1=33uH to enter voltage, electric capacity C1=150uF, switching frequency 150kHz, circuit simulation choosing
Fixed Switching Power Supply electric capacity equivalent resistance is 200m Ω, by the dutycycle for adjusting M1 control signals, it is possible to achieve defeated to loading
Go out voltage Uo control.Needed in the appraisal procedure of computational load capacitor equivalent resistance collection flow through inductance size of current and
The voltage swing at electric capacity both ends.Inductive current measurement can be carried out using current sensor mode, and capacitance voltage measurement uses ADC
Mode is realized.
The performance comparision of algorithms of different when table 1 gives known noise characteristic under single working condition.Can be with by analysis
Find out, when known to noise characteristic, Kalman algorithm performances are optimal, and modified UFIR is achieved approximately with UFIR filtering algorithms
Performance, and be much better than directly to calculate using initial data.
Single operating mode under the known noise characteristic of table 1
| Algorithm | Average | Variance |
| Directly calculate | 199.93 | 9.72 |
| Kalman | 199.42 | 2.83 |
| UFIR is filtered | 200.39 | 3.45 |
| Improve UFIR | 202 | 3.34 |
When noise characteristic is unknown, knot accurately can not be calculated to noise modeling, reference table 2, now, kalman filtering algorithms
Fruit fluctuation increase, UFIR filtering algorithms do not need noise statisticses modeling with modified UFIR algorithms, and its algorithm performance is kept
It is stable.
Single operating mode under the unknown noise characteristic of table 2
| Algorithm | Average | Variance |
| Directly calculate | 201.37 | 11.53 |
| Kalman | 201.56 | 5.02 |
| UFIR is filtered | 199.61 | 3.31 |
| Improve UFIR | 200.52 | 3.61 |
Reference table 3 is complex working condition under unknown noise characteristic, the data statistics of each method.When circuit is in various working bar
Part, and when repeatedly being switched, ESR assessment result variances significantly improve.Because noise characteristic is unknown, different operating mode noises cause
The fluctuation of Kalman filter result of calculation is larger.UFIR filtering algorithms due to when operating mode switches iterative regression speed it is slower,
The variance fluctuation calculated in this period is larger.Improve UFIR and accelerate iterative regression speed, its result of calculation variance is minimum, property
Other algorithms can be better than.
Complex working condition under the unknown noise characteristic of table 3
| Algorithm | Average | Variance |
| Directly calculate | 200.01 | 12.37 |
| Kalman | 200.44 | 7.11 |
| UFIR is filtered | 199.74 | 5.95 |
| Improve UFIR | 200.52 | 4.02 |
In the present embodiment, be can be seen that from above-mentioned several groups of emulation when noise statisticses are unknown and operating mode switching is frequent
Under the conditions of, modified UFIR filtering algorithms embody stronger robustness, have preferably adapted to real application scenarios.
Therefore, the present invention is in the assessment for being directed to Switching Power Supply electric capacity equivalent resistance based on modified UFIR filtering algorithms
The relatively other prior arts of method make great progress.
Non-elaborated part of the present invention belongs to the known technology of those skilled in the art.It is in addition, described in detail above
The preferred embodiment of the present invention.It should be appreciated that one of ordinary skill in the art without creative work can according to
Many modifications and variations are made in the design of the present invention.Therefore, all technician in the art are under this invention's idea existing
Have on the basis of technology by the available technical scheme of logical analysis, reasoning, or a limited experiment, all should be by right
Determined by claim in protection domain.
Claims (6)
1. a kind of appraisal procedure of Switching Power Supply load capacitance equivalent series resistance, it is characterised in that comprise the following steps：
S1. capacitance voltage and inductive current are measured, obtains N group measurement data；
S2. calculation matrix is built；
S3. increased using the load capacitance ESR calculation of initial value initial optimization estimates and broad sense noise power of preceding N ranks moment state
Benefit；
S4. new capacitance voltage and inductive current calculated value are inputted, is calculated using broad sense noise power gain and optimal estimating value
New equivalent series resistance assessed value；
S5. broad sense noise power gain is updated, waits new data to arrive, repeat step S4, renewal calculates equivalent series resistance and commented
Valuation.
2. a kind of appraisal procedure of Switching Power Supply load capacitance equivalent series resistance according to claim 1, its feature exist
In the step S1 is comprised the following specific steps that：
S11. the data window length for selecting unbiased finite impulse response filtering algorithm wave filter is N；
S12. N groups capacitance voltage and inductive current measured value are obtained.
3. a kind of appraisal procedure of Switching Power Supply load capacitance equivalent series resistance according to claim 1, its feature exist
In the method for calculation matrix is built in the step S2 to be included, and utilizes capacitance voltage, inductive current and load capacitance of measurement etc.
Relation between effect resistance establishes calculation matrix.
4. a kind of appraisal procedure of Switching Power Supply load capacitance equivalent series resistance according to claim 1, its feature exist
In calculating initial optimization estimate and broad sense noise power gain calculation are as follows in the step S3：
Initial optimization calculation formula is expressed as：
<mrow>
<mover>
<msub>
<mi>x</mi>
<mi>N</mi>
</msub>
<mo>^</mo>
</mover>
<mo>=</mo>
<msup>
<mrow>
<mo>(</mo>
<msubsup>
<mover>
<mi>C</mi>
<mo>&OverBar;</mo>
</mover>
<mi>N</mi>
<mi>T</mi>
</msubsup>
<msub>
<mover>
<mi>C</mi>
<mo>&OverBar;</mo>
</mover>
<mi>N</mi>
</msub>
<mo>)</mo>
</mrow>
<mrow>
<mo>-</mo>
<mn>1</mn>
</mrow>
</msup>
<msubsup>
<mover>
<mi>C</mi>
<mo>&OverBar;</mo>
</mover>
<mi>N</mi>
<mi>T</mi>
</msubsup>
<msub>
<mi>Y</mi>
<mrow>
<mn>1</mn>
<mo>,</mo>
<mi>N</mi>
</mrow>
</msub>
<mo>,</mo>
</mrow>
Broad sense noise power gain calculation formula is：
GN=(CTC)-1。
5. a kind of appraisal procedure of Switching Power Supply load capacitance equivalent series resistance according to claim 1, its feature exist
In the step S4 Computational Methods build new data matrix Y using new capacitance voltage and inductive current measured valuek,
Then update broad sense noise power gain matrix：
<mrow>
<msub>
<mi>G</mi>
<mi>k</mi>
</msub>
<mo>=</mo>
<msub>
<mi>&theta;</mi>
<mi>k</mi>
</msub>
<msup>
<mrow>
<mo>&lsqb;</mo>
<msup>
<mi>C</mi>
<mi>T</mi>
</msup>
<mi>C</mi>
<mo>+</mo>
<msubsup>
<mi>G</mi>
<mrow>
<mi>k</mi>
<mo>-</mo>
<mn>1</mn>
</mrow>
<mrow>
<mo>-</mo>
<mn>1</mn>
</mrow>
</msubsup>
<mo>&rsqb;</mo>
</mrow>
<mrow>
<mo>-</mo>
<mn>1</mn>
</mrow>
</msup>
<mo>,</mo>
</mrow>
The iterative calculation equation of equivalent series resistance assessed value is：
6. a kind of appraisal procedure of Switching Power Supply load capacitance equivalent series resistance according to claim 1, its feature exist
In the step S5 is concretely comprised the following steps：
S51. the root mean square of the assessed value deviation at K moment is recorded：
<mrow>
<msub>
<mi>&alpha;</mi>
<mi>k</mi>
</msub>
<mo>=</mo>
<msqrt>
<mfrac>
<mrow>
<msup>
<mrow>
<mo>(</mo>
<msub>
<mi>y</mi>
<mi>k</mi>
</msub>
<mo>-</mo>
<mi>C</mi>
<mover>
<msub>
<mi>x</mi>
<mi>k</mi>
</msub>
<mo>^</mo>
</mover>
<mo>)</mo>
</mrow>
<mi>T</mi>
</msup>
<mrow>
<mo>(</mo>
<msub>
<mi>y</mi>
<mi>k</mi>
</msub>
<mo>-</mo>
<mi>C</mi>
<mover>
<msub>
<mi>x</mi>
<mi>k</mi>
</msub>
<mo>^</mo>
</mover>
<mo>)</mo>
</mrow>
</mrow>
<mi>&beta;</mi>
</mfrac>
</msqrt>
<mo>;</mo>
</mrow>
S52. the broad sense noise power gain adjustment factor θ at kth moment is calculatedkIt is defined as：
<mrow>
<msub>
<mi>&theta;</mi>
<mi>k</mi>
</msub>
<mo>=</mo>
<mroot>
<mrow>
<msub>
<mi>&alpha;</mi>
<mrow>
<mi>k</mi>
<mo>-</mo>
<mn>1</mn>
</mrow>
</msub>
<mo>/</mo>
<msub>
<mi>&alpha;</mi>
<mi>k</mi>
</msub>
</mrow>
<mi>&beta;</mi>
</mroot>
<mo>;</mo>
</mrow>
S53. wait new measurement data to arrive, repeat S4-S5 steps, update equivalent series resistance assessed value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710846522.7A CN107741572A (en) | 2017-09-19 | 2017-09-19 | A kind of appraisal procedure of Switching Power Supply load capacitance equivalent resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710846522.7A CN107741572A (en) | 2017-09-19 | 2017-09-19 | A kind of appraisal procedure of Switching Power Supply load capacitance equivalent resistance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107741572A true CN107741572A (en) | 2018-02-27 |
Family
ID=61235185
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710846522.7A Pending CN107741572A (en) | 2017-09-19 | 2017-09-19 | A kind of appraisal procedure of Switching Power Supply load capacitance equivalent resistance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107741572A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109412178A (en) * | 2018-10-19 | 2019-03-01 | 湖南大学 | A kind of switching control method of high-voltage large-capacity impedance measurement equipment |
| CN112362971A (en) * | 2020-10-30 | 2021-02-12 | 苏州华兴源创科技股份有限公司 | Power module equivalent resistance testing method, device, equipment and storage medium |
| CN112418701A (en) * | 2020-12-02 | 2021-02-26 | 广东电网有限责任公司广州供电局 | Power distribution network line equivalent resistance calculation method and device, terminal and storage medium |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103235188A (en) * | 2013-05-02 | 2013-08-07 | 合肥工业大学 | Method for measuring and predicting capacitor ESR (Equivalent Series Resistance) values of switching power supplies on line |
| CN103500455A (en) * | 2013-10-15 | 2014-01-08 | 北京航空航天大学 | Improved maneuvering target tracking method based on unbiased finite impulse response (UFIR) filter |
| CN103605084A (en) * | 2013-11-14 | 2014-02-26 | 南京理工大学 | Monitoring apparatus and method for ESR and C of boost PFC converter |
| CN104836445A (en) * | 2015-04-29 | 2015-08-12 | 南京理工大学 | Device and method for monitoring ESR and C of output capacitor of flyback PFC converter |
-
2017
- 2017-09-19 CN CN201710846522.7A patent/CN107741572A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103235188A (en) * | 2013-05-02 | 2013-08-07 | 合肥工业大学 | Method for measuring and predicting capacitor ESR (Equivalent Series Resistance) values of switching power supplies on line |
| CN103500455A (en) * | 2013-10-15 | 2014-01-08 | 北京航空航天大学 | Improved maneuvering target tracking method based on unbiased finite impulse response (UFIR) filter |
| CN103605084A (en) * | 2013-11-14 | 2014-02-26 | 南京理工大学 | Monitoring apparatus and method for ESR and C of boost PFC converter |
| CN104836445A (en) * | 2015-04-29 | 2015-08-12 | 南京理工大学 | Device and method for monitoring ESR and C of output capacitor of flyback PFC converter |
Non-Patent Citations (2)
| Title |
|---|
| A. VICENTE T. LEITE,ET.AL: "A SIMPLE ESR IDENTIFICATION METHODOLOGY FOR ELECTROLYTIC CAPACITORS CONDITION MONITORING", 《INTERNAL CONGRESS ON CONDITION MONITORING AND DIAGNOSTIC ENGINEERING MANAGEMENT》 * |
| 付锦斌 等: "针对机动目标的改进UFIR跟踪算法", 《北京航空航天大学学报》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109412178A (en) * | 2018-10-19 | 2019-03-01 | 湖南大学 | A kind of switching control method of high-voltage large-capacity impedance measurement equipment |
| CN109412178B (en) * | 2018-10-19 | 2021-04-30 | 湖南大学 | Switching control method of high-voltage high-capacity impedance measurement equipment |
| CN112362971A (en) * | 2020-10-30 | 2021-02-12 | 苏州华兴源创科技股份有限公司 | Power module equivalent resistance testing method, device, equipment and storage medium |
| CN112362971B (en) * | 2020-10-30 | 2024-05-31 | 苏州华兴源创科技股份有限公司 | Power module equivalent resistance testing method, device, equipment and storage medium |
| CN112418701A (en) * | 2020-12-02 | 2021-02-26 | 广东电网有限责任公司广州供电局 | Power distribution network line equivalent resistance calculation method and device, terminal and storage medium |
| CN112418701B (en) * | 2020-12-02 | 2022-10-25 | 广东电网有限责任公司广州供电局 | Power distribution network line equivalent resistance calculation method and device, terminal and storage medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104181470B (en) | Battery state-of-charge (SOC) estimation method based on nonlinear prediction extended Kalman filtering | |
| CN110320425B (en) | ESR (equivalent series resistance) monitoring method for output capacitor of Buck-type direct-current-direct-current converter | |
| CN102879728B (en) | DC-DC converter health evaluating index and failure prediction method | |
| CN107741572A (en) | A kind of appraisal procedure of Switching Power Supply load capacitance equivalent resistance | |
| CN104750915B (en) | A kind of Buck circuits multi-parameter on-line identification method | |
| US9876352B2 (en) | Voltage stability monitoring in power systems | |
| CN102420427B (en) | Method for calculating voltage stability margin of regional power grid by considering outer network equivalence | |
| CN105278353B (en) | Method, system and the data processing equipment of intelligent acquisition data | |
| CN106370912A (en) | Method, system and motor-driving system for improving MOSFET tube current sampling accuracy | |
| CN108448585A (en) | A kind of electric network swim equation solution method of linearization based on data-driven | |
| CN106452369A (en) | High-efficiency envelope tracking power supply based on power amplifier output signal control and method | |
| CN110147827A (en) | A kind of failure prediction method based on IAALO-SVM and similarity measurement | |
| CN115128395A (en) | Voltage sag source positioning method and device | |
| CN107462810A (en) | A kind of fault section location method suitable for active power distribution network | |
| CN106771617A (en) | Insulaion resistance detection method and device based on low frequency injection technique | |
| CN117250436B (en) | Power distribution network traveling wave signal positioning method based on dynamic mode and double-end traveling wave method | |
| CN106233135A (en) | Use the structural healthy monitoring system of dynamo-electric resistance technique | |
| CN103972889B (en) | A kind of distribution line impedance on-line identification method | |
| CN113189513A (en) | Ripple-based redundant power supply current sharing state identification method | |
| CN113820541A (en) | System harmonic impedance estimation method based on improved variable coefficient regression | |
| CN114578182A (en) | Power distribution network fault positioning method and device | |
| CN105591535B (en) | A kind of power factor control method and device | |
| CN108918929A (en) | Power signal adaptive filter method in a kind of load decomposition | |
| KR102255058B1 (en) | Operation system of dc power system based on power sensitivity | |
| CN116184036A (en) | Power electronic converter parameter online identification method and system based on neural network |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 510000 Guangdong Guangzhou city Guangzhou high tech Industrial Development Zone Science City Yushu Industrial Park, Yushu Industrial Park, No. 2, house J, No. 103 Applicant after: Guangdong science testing Engineering Technology Co., Ltd. Applicant after: China Science (Shenzhen) Technology Service Co., Ltd. Address before: 510000 Guangdong Guangzhou city Guangzhou high tech Industrial Development Zone Science City Yushu Industrial Park, Yushu Industrial Park, No. 2, house J, No. 103 Applicant before: Guangdong science testing Engineering Technology Co., Ltd. Applicant before: Shenzhen pulse Intelligent Technology Co., Ltd. |
|
| CB02 | Change of applicant information | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180227 |
|
| RJ01 | Rejection of invention patent application after publication |