CN202057732U - Capacitor and device for detecting ripple current of high-voltage aluminium electrolytic capacitor of switch power supply - Google Patents
Capacitor and device for detecting ripple current of high-voltage aluminium electrolytic capacitor of switch power supply Download PDFInfo
- Publication number
- CN202057732U CN202057732U CN2011200471196U CN201120047119U CN202057732U CN 202057732 U CN202057732 U CN 202057732U CN 2011200471196 U CN2011200471196 U CN 2011200471196U CN 201120047119 U CN201120047119 U CN 201120047119U CN 202057732 U CN202057732 U CN 202057732U
- Authority
- CN
- China
- Prior art keywords
- ripple current
- electric capacity
- low
- voltage
- sampling resistor
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
The utility model discloses a capacitor and a device for detecting the ripple current of the high-voltage aluminium electrolytic capacitor of a switch power supply. The device comprises a sampling resistor, and a high pass filter and a low pass filter which are in parallel connection with the sampling resistor respectively, wherein one end of the sampling resistor is connected with the anode of a to-be-detected capacitor, with the other end of the sampling resistor being connected with an input power supply; an oscilloscope, connected with the high pass filter and the low pass filter, conducts sampling over the high frequency voltage and low frequency voltage of the sampling resistor; a calculator, connected with the oscilloscope, transforms the high frequency voltage and the low frequency voltage into high frequency ripple current and low frequency ripple current and further transforms them into the ripple current under standard frequency and calculates the root-mean-square value of the two ripple currents, thus to obtain the actual ripple current passing the to-be-detected capacitor. The device is capable of measuring the ripple current value of a capacitor, improving the reliability of high-voltage aluminium electrolytic capacitor of a switch with lowest cost, and reducing the cost of research and development as well as maintenance.
Description
Technical field
The utility model relates to electronic applications, relates in particular to a kind of electric capacity ripple current pick-up unit and Switching Power Supply high-pressure aluminum electrolytic electric capacity ripple current pick-up unit.
Background technology
In today of electronic technology high speed development, Switching Power Supply all has use at electronic equipment miscellaneous.The life-span of Switching Power Supply is depended on alminium electrolytic condenser to a great extent, because in the Switching Power Supply product, chance failure only appears in other components and parts except that alminium electrolytic condenser, alminium electrolytic condenser is because chemical change, the loss fault can take place, this fault mode is compared with the chance failure pattern of other components and parts, problem is more serious, because concerning the loss fault, as long as one to the time of determining, just to break down certainly, therefore, guarantee that alminium electrolytic condenser does not break down very important in Switching Power Supply in useful life period.
Because alminium electrolytic condenser is from equivalent electrical circuit, be not simple electric capacity, but include the circuit of resistance in series and series inductance, equivalent series resistance is a dissipative cell, its loss power becomes heat, thereby influenced the life-span of alminium electrolytic condenser, when flowing through ripple current in the alminium electrolytic condenser, the degree of the different electric capacity heatings of its resistance value is just different, its time that loss fault takes place is just different, but its impedance is with frequency change, so all having, various alminium electrolytic condensers are defined in the ripple current value (producer provides) that allows under the different frequency of operation, will if from prolonging the life-span of alminium electrolytic condenser, should increase the surplus to ripple current, but this have a prerequisite: the actual ripple current value of bearing of alminium electrolytic condenser in the metering circuit how?
The alminium electrolytic condenser that uses in alminium electrolytic condenser and other place of the use of Switching Power Supply primary circuit still has some differences, characteristics are that alminium electrolytic condenser need bear the ripple current of two kinds of frequencies, a part becomes the DC voltage of the pulsation of 100/120HZ after by rectification for the sinusoidal voltage of civil power 50/60HZ, a part is cut into the voltage of 100/120HZ by high frequency switching device the square wave of tens KHZ or hundreds of KHZ for the chopper circuit of the switching circuit portion of Switching Power Supply in addition, when the ripple current of different frequency passes through alminium electrolytic condenser, the impedance of alminium electrolytic condenser is different, so loss power difference that produces during the ripple current of onesize different frequency process alminium electrolytic condenser, influence to the alminium electrolytic condenser life-span is also different, and alminium electrolytic condenser producer also to be defined in the ripple current value that allows under the different frequency of operation be different.Therefore, when the alminium electrolytic condenser of Switching Power Supply is carried out reliability design, having only ripple current with these two kinds of frequencies to provide the relation of ripple current and frequency to convert to a kind of ripple current value of frequency according to producer calculates, the real ripple current that could reflect the Switching Power Supply alminium electrolytic condenser really, and be unlikely to take place the actual ripple current overrate of electrochemical capacitor, cause electrolyte temperature too high, make that alminium electrolytic condenser is very fast to lose efficacy because of electrolytic solution is withered, influence the user and normally use, the maintenance cost of producer raises.And if design is excessive with the design of ripple current value allowance during alminium electrolytic condenser, also can cause enterprise cost too high, influence competitive power.
Simultaneously, the main ripple current that adopts the oscillograph that has the high-frequency current probe to measure alminium electrolytic condenser on the engineering, but the costing an arm and a leg of this instrument are generally more than hundreds of thousands.And this oscilloscope measurement is to be first-harmonic with 100/120HZ but can to expand into a waveform of high frequency ripple electric current, this waveform contains and comprises all radio-frequency components, the low-frequency ripple current component of measuring is much larger than the low-frequency ripple electric current of reality, though the reliability of alminium electrolytic condenser is enhanced much virtually, this causes the selection of high-voltage capacitance harsh more virtually, has directly increased the cost of product.
The utility model content
The utility model embodiment technical matters to be solved is, a kind of electric capacity ripple current pick-up unit and Switching Power Supply high-pressure aluminum electrolytic electric capacity ripple current pick-up unit are provided, can accurately measure the ripple current value of electric capacity, improve the reliability of Switching Power Supply high-pressure aluminum electrolytic electric capacity with minimum cost, for enterprise reduces the maintenance cost of R﹠D costs and product, and implement of the present utility model with low cost.
In order to solve the problems of the technologies described above, the utility model embodiment provides a kind of electric capacity ripple current pick-up unit, comprising:
Sampling resistor and Hi-pass filter and low-pass filter in parallel with described sampling resistor respectively; Described sampling resistor one end is connected with the positive pole of testing capacitance, and the other end is connected with the input power supply;
With the oscillograph that described Hi-pass filter is connected with low-pass filter, described oscillograph is sampled to the HF voltage on the sampling resistor and low-frequency voltage and is obtained;
The counter that is connected with described oscillograph, described counter is converted to high frequency ripple electric current and low-frequency ripple electric current with described HF voltage and low-frequency voltage, and further be ripple current under the standard frequency with described high frequency ripple electric current and low-frequency ripple current conversion, and calculate the root-mean-square value of two ripple currents, draw the actual ripple current of the described testing capacitance of flowing through.
Wherein, the minus earth of described testing capacitance, anodal and described sampling resistor is connected.
Wherein, described input power supply comprises two parts, the DC voltage of the pulsation that a part forms after by rectification for city's voltage, in addition a part be the chopper circuit of Switching Power Supply to the DC voltage conversion of described pulsation after the 10KHz-1000 KHz square wave of formation.
Wherein, described counter comprises:
The ripple current of default described testing capacitance and the scale-up factor of frequency, and the parameter of described standard frequency is provided with module;
The size of HF voltage, low-frequency voltage and the sampling resistor that obtains according to described oscillograph is calculated by the high frequency ripple electric current of described sampling resistor and first computing module of low-frequency ripple electric current;
According to described parameter the ripple current of module settings and the scale-up factor and the described standard frequency of frequency are set, second computing module that high frequency ripple electric current that described first computing module is calculated and low-frequency ripple electric current are converted to the standard frequency ripple current respectively;
Calculate the root-mean-square value of two standard frequency ripple currents that the conversion of described second computing module draws, draw the 3rd computing module of the actual ripple current of the described testing capacitance of flowing through.
Wherein, described counter also comprises:
Judge whether the actual ripple current of the testing capacitance that described electric current computing module draws surpasses the judge module of the rated ripple current of described testing capacitance.
Wherein, described Hi-pass filter is made of high pass electric capacity and the series connection of first resistance; Described low-pass filter is made of low pass electric capacity and the series connection of second resistance.
Wherein, the positive pole that described oscillographic first test side is connected between the described high pass electric capacity and first resistance, second test side is connected described testing capacitance is sampled to the HF voltage on the sampling resistor;
The positive pole that described oscillographic the 3rd test side is connected between the described low pass electric capacity and second resistance, the 4th test side is connected described testing capacitance is sampled to the low-frequency voltage on the sampling resistor.
Wherein, described Hi-pass filter and low-pass filter are digital filter.
Wherein, described testing capacitance is an alminium electrolytic condenser.
Accordingly, the utility model also provides a kind of Switching Power Supply high-pressure aluminum electrolytic electric capacity ripple current pick-up unit, comprises above-mentioned electric capacity ripple current pick-up unit in this Switching Power Supply high-pressure aluminum electrolytic electric capacity ripple current pick-up unit.
Implement electric capacity ripple current pick-up unit and Switching Power Supply high-pressure aluminum electrolytic electric capacity ripple current pick-up unit that the utility model embodiment provides, can accurately measure the ripple current value of electric capacity, improve the reliability of Switching Power Supply high-pressure aluminum electrolytic electric capacity with minimum cost, for enterprise reduces the maintenance cost of R﹠D costs and product, and implement of the present utility model with low cost.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
The electric capacity ripple current pick-up unit first example structure synoptic diagram that Fig. 1 provides for the utility model;
The electric capacity ripple current pick-up unit second example structure synoptic diagram that Fig. 2 provides for the utility model;
Electric capacity ripple current pick-up unit the 3rd example structure synoptic diagram that Fig. 3 provides for the utility model.
Embodiment
Implement electric capacity ripple current pick-up unit and Switching Power Supply high-pressure aluminum electrolytic electric capacity ripple current pick-up unit that the utility model embodiment provides, can accurately measure the ripple current value of electric capacity, improve the reliability of Switching Power Supply high-pressure aluminum electrolytic electric capacity with minimum cost, for enterprise reduces the maintenance cost of R﹠D costs and product, and implement of the present utility model with low cost.
Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the utility model protection.
Referring to Fig. 1, be the electric capacity ripple current pick-up unit first example structure synoptic diagram that the utility model provides, as shown in Figure 1, this device comprises:
Sampling resistor 1 and Hi-pass filter 2 and low-pass filter 3 in parallel with sampling resistor 1 respectively; Sampling resistor 1 one ends are connected with the positive pole of testing capacitance 7, and the other end is connected with input power supply 4.
With the oscillograph 5 that Hi-pass filter 2 is connected with low-pass filter 3, HF voltage on 5 pairs of sampling resistors 1 of oscillograph and low-frequency voltage are sampled and are obtained.
The counter 6 that is connected with oscillograph 5, counter 6 is converted to high frequency ripple electric current and low-frequency ripple electric current with HF voltage and low-frequency voltage, and further be ripple current under the standard frequency with high frequency ripple electric current and low-frequency ripple current conversion, and calculate the root-mean-square value of two ripple currents, draw the actual ripple current of the testing capacitance 7 of flowing through.
The electric capacity ripple current pick-up unit that implementing the utility model embodiment provides can accurately be measured the ripple current value of electric capacity, improve the reliability of Switching Power Supply high-pressure aluminum electrolytic electric capacity with minimum cost, for enterprise reduces the maintenance cost of R﹠D costs and product, and implement of the present utility model with low cost.
Referring to Fig. 2, the electric capacity ripple current pick-up unit second example structure synoptic diagram that provides for the utility model, in the present embodiment, with the structure of this electric capacity ripple current pick-up unit of more detailed description.This device comprises as shown in Figure 2:
One end is connected with the positive pole of testing capacitance 7, the sampling resistor 1 that the other end is connected with input power supply 4, simultaneously, and the minus earth of testing capacitance 7, positive pole is connected with sampling resistor 1.In the present embodiment, the electric current of input power supply 4 inputs comprises two parts, the DC voltage of the pulsation of the 100/120HZ that a part forms after by rectification for the sinusoidal voltage of civil power 50/60HZ, the 10KHz-1000 KHz square wave by high frequency switching device the voltage of 100/120HZ cut for the chopper circuit of the switching circuit portion of Switching Power Supply of a part in addition.
Hi-pass filter 2 and low-pass filter 3 are in parallel with sampling resistor 1 respectively.Oscillograph 5 is connected with low-pass filter 3 with Hi-pass filter 2, and oscillograph 5 is used for the HF voltage on the sampling resistor 1 and low-frequency voltage are sampled and obtained.
By the foregoing circuit structure, sampling resistor 1 that resistance is less of serial connection between the positive voltage after the rectification of elementary high-voltage capacitance positive pole of Switching Power Supply and electrical network, the ripple current of testing capacitance 7 just will be all by sampling resistor 1 like this, sampling resistor 1 changes current signal into voltage signal, by the low-pass filter 3 in sampling resistor 1 two ends parallel connection, oscillograph 5 is easy to detect low-frequency voltage on the sampling resistor 1; In like manner, by the Hi-pass filter 2 in sampling resistor 1 two ends parallel connection, oscillograph 5 also can detect HF voltage on the sampling resistor 1, so just the voltage on the sampling resistor 1 has been separated by two wave filters.
The ripple current of default testing capacitance 7 and the scale-up factor of frequency, and the parameter of standard frequency is provided with module 64.The scale-up factor of testing capacitance 7 ripple currents and frequency can be found by the electric capacity specifications.
The size of HF voltage, low-frequency voltage and the sampling resistor 1 that obtains according to oscillograph 5 is calculated by the high frequency ripple electric current of sampling resistor 1 and first computing module 61 of low-frequency ripple electric current.First computing module 61 can be according to Ohm law, and the HF voltage of obtaining with oscillograph 5, low-frequency voltage obtain by the high frequency ripple electric current of sampling resistor 1 and the size of low-frequency ripple electric current divided by the size of sampling resistor 1 respectively.
According to parameter the ripple current that module 64 sets and the scale-up factor and the standard frequency of frequency are set, second computing module 62 that high frequency ripple electric current that first computing module is calculated and low-frequency ripple electric current are converted to the standard frequency ripple current respectively.
Calculate second computing module 62 and change the root-mean-square value of two standard frequency ripple currents that draw, draw the 3rd computing module 63 of the actual ripple current of the testing capacitance 7 of flowing through.
Preferably, counter 6 also comprises: whether judge module 65, the actual ripple current of the testing capacitance 7 that is used to judge that the electric current computing module draws surpass the rated ripple current of testing capacitance 7.In order to guarantee the operate as normal of electric capacity, each electric capacity all can have a rated current, and the electric current of the electric capacity of flowing through surpasses rated current, will influence the serviceable life of electric capacity.And in the present embodiment, because testing capacitance (being generally alminium electrolytic condenser) need bear the ripple current of two kinds of frequencies.When the ripple current of different frequency passed through alminium electrolytic condenser, the impedance of alminium electrolytic condenser was different, so the loss power that produces is also different, so that also different to the influence in alminium electrolytic condenser life-span.Therefore, when the alminium electrolytic condenser of Switching Power Supply is carried out reliability design, having only ripple current with these two kinds of frequencies to provide the relation of ripple current and frequency to convert to a kind of ripple current value of frequency according to producer calculates, the real ripple current that could reflect the Switching Power Supply alminium electrolytic condenser really, and be unlikely to take place the actual ripple current overrate of electrochemical capacitor, cause electrolyte temperature too high, make that alminium electrolytic condenser is very fast to lose efficacy because of electrolytic solution is withered.The electric capacity ripple current pick-up unit that enforcement the utility model embodiment provides is just at the problems referred to above, can accurately measure the ripple current value of electric capacity, improve the reliability of Switching Power Supply high-pressure aluminum electrolytic electric capacity with minimum cost, for enterprise reduces the maintenance cost of R﹠D costs and product, and implement of the present utility model with low cost.
Referring to Fig. 3, electric capacity ripple current pick-up unit the 3rd example structure synoptic diagram that provides for the utility model, in the present embodiment, with the structure of this electric capacity ripple current pick-up unit of more detailed description.This device comprises as shown in Figure 3:
One end is connected with the positive pole of testing capacitance 7, the sampling resistor 1 that the other end is connected with input power supply 4, simultaneously, and the minus earth of testing capacitance 7, positive pole is connected with sampling resistor 1.Sampling resistor 1 one ends are connected with the positive pole of testing capacitance 7, and the other end is connected with input power supply 4.
Hi-pass filter and low-pass filter in parallel with sampling resistor 1 respectively; Hi-pass filter is made of high pass electric capacity 21 and 22 series connection of first resistance; Low-pass filter is made of low pass electric capacity 31 and 32 series connection of second resistance.
Oscillograph 5 is connected with low-pass filter 3 with Hi-pass filter 2, is used for the HF voltage on the sampling resistor 1 and low-frequency voltage are sampled and obtained.More specifically, first of oscillograph 5 detects the positive pole that 51 ends are connected between the high pass electric capacity 21 and first resistance 22, second test side 52 is connected testing capacitance 7, and the HF voltage on the sampling resistor 1 is sampled.The positive pole that the 3rd test side 53 of oscillograph 5 is connected between the low pass electric capacity 31 and second resistance 32, the 4th test side 54 is connected testing capacitance 7 is sampled to the low-frequency voltage on the sampling resistor 1.Certainly, Hi-pass filter in the present embodiment and low-pass filter can substitute with digital filter or other wave filter with same function.
The electric capacity ripple current pick-up unit that present embodiment provides is applicable to the ripple current that detects alminium electrolytic condenser, is used in particular for the ripple current of detector switch power supply high-pressure aluminum electrolytic electric capacity.Therefore, the utility model also provides a kind of Switching Power Supply high-pressure aluminum electrolytic electric capacity ripple current pick-up unit, comprises among above-mentioned three embodiment the electric capacity ripple current pick-up unit of putting down in writing in any in the Switching Power Supply high-pressure aluminum electrolytic electric capacity ripple current pick-up unit.
Implement electric capacity ripple current pick-up unit and Switching Power Supply high-pressure aluminum electrolytic electric capacity ripple current pick-up unit that the utility model embodiment provides, can accurately measure the ripple current value of electric capacity, improve the reliability of Switching Power Supply high-pressure aluminum electrolytic electric capacity with minimum cost, for enterprise reduces the maintenance cost of R﹠D costs and product, and implement of the present utility model with low cost.
One of ordinary skill in the art will appreciate that all or part of flow process that realizes in the foregoing description method, be to instruct relevant hardware to finish by computer program, described program can be stored in the computer read/write memory medium, this program can comprise the flow process as the embodiment of above-mentioned each side method when carrying out.Wherein, described storage medium can be magnetic disc, CD, read-only storage memory body (Read-Only Memory, ROM) or at random store memory body (Random Access Memory, RAM) etc.
Above disclosed only is a kind of preferred embodiment of the utility model, can not limit the interest field of the utility model certainly with this, and therefore the equivalent variations of being done according to the utility model claim still belongs to the scope that the utility model is contained.
Claims (7)
1. an electric capacity ripple current pick-up unit is characterized in that, comprising:
Sampling resistor and Hi-pass filter and low-pass filter in parallel with described sampling resistor respectively; Described sampling resistor one end is connected with the positive pole of testing capacitance, and the other end is connected with the input power supply;
With the oscillograph that described Hi-pass filter is connected with low-pass filter, described oscillograph is sampled to the HF voltage on the sampling resistor and low-frequency voltage and is obtained;
The counter that is connected with described oscillograph, described counter is converted to high frequency ripple electric current and low-frequency ripple electric current with described HF voltage and low-frequency voltage, and further be ripple current under the standard frequency with described high frequency ripple electric current and low-frequency ripple current conversion, and calculate the root-mean-square value of two ripple currents, draw the actual ripple current of the described testing capacitance of flowing through.
2. electric capacity ripple current pick-up unit as claimed in claim 1 is characterized in that, the minus earth of described testing capacitance, and anodal and described sampling resistor is connected.
3. electric capacity ripple current pick-up unit as claimed in claim 2, it is characterized in that, described input power supply comprises two parts, the DC voltage of the pulsation that a part forms after by rectification for city's voltage, in addition a part be the chopper circuit of Switching Power Supply to the DC voltage conversion of described pulsation after the 10KHz-1000KHz square wave of formation.
4. electric capacity ripple current pick-up unit as claimed in claim 3 is characterized in that, described Hi-pass filter is made of high pass electric capacity and the series connection of first resistance; Described low-pass filter is made of low pass electric capacity and the series connection of second resistance.
5. electric capacity ripple current pick-up unit as claimed in claim 4, it is characterized in that, the positive pole that described oscillographic first test side is connected between the described high pass electric capacity and first resistance, second test side is connected described testing capacitance is sampled to the HF voltage on the sampling resistor;
The positive pole that described oscillographic the 3rd test side is connected between the described low pass electric capacity and second resistance, the 4th test side is connected described testing capacitance is sampled to the low-frequency voltage on the sampling resistor.
6. electric capacity ripple current pick-up unit as claimed in claim 3 is characterized in that described Hi-pass filter and low-pass filter are digital filter.
7. a Switching Power Supply high-pressure aluminum electrolytic electric capacity ripple current pick-up unit is characterized in that, comprises as each described electric capacity ripple current pick-up unit in the claim 1 to 9 in the described Switching Power Supply high-pressure aluminum electrolytic electric capacity ripple current pick-up unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200471196U CN202057732U (en) | 2011-02-23 | 2011-02-23 | Capacitor and device for detecting ripple current of high-voltage aluminium electrolytic capacitor of switch power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200471196U CN202057732U (en) | 2011-02-23 | 2011-02-23 | Capacitor and device for detecting ripple current of high-voltage aluminium electrolytic capacitor of switch power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202057732U true CN202057732U (en) | 2011-11-30 |
Family
ID=45017702
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200471196U Expired - Fee Related CN202057732U (en) | 2011-02-23 | 2011-02-23 | Capacitor and device for detecting ripple current of high-voltage aluminium electrolytic capacitor of switch power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202057732U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015154587A1 (en) * | 2014-10-24 | 2015-10-15 | 中兴通讯股份有限公司 | Measurement apparatus and method for ripple current |
| CN106645873A (en) * | 2016-12-22 | 2017-05-10 | 北京金风科创风电设备有限公司 | Direct-current support capacitor protection method and device and ripple current detection method and device |
| CN106772115A (en) * | 2015-11-19 | 2017-05-31 | 中车大连电力牵引研发中心有限公司 | Switching Power Supply ripple measurement apparatus and measuring method |
| CN108008174A (en) * | 2017-06-30 | 2018-05-08 | 宁波方太厨具有限公司 | A kind of power supply ripple voltage check device |
| CN108879616A (en) * | 2018-07-26 | 2018-11-23 | 奥克斯空调股份有限公司 | A kind of capacitor ripple current protective device, method and air conditioner |
| CN111983299A (en) * | 2020-10-26 | 2020-11-24 | 南京容测检测技术有限公司 | AC power line ripple detector for electromagnetic compatibility test |
| CN113640694A (en) * | 2020-04-26 | 2021-11-12 | 中移(成都)信息通信科技有限公司 | Ripple noise test probe and test device |
| CN113933738A (en) * | 2021-09-08 | 2022-01-14 | 国网甘肃省电力公司电力科学研究院 | Monitoring method and device for switching power supply |
-
2011
- 2011-02-23 CN CN2011200471196U patent/CN202057732U/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015154587A1 (en) * | 2014-10-24 | 2015-10-15 | 中兴通讯股份有限公司 | Measurement apparatus and method for ripple current |
| CN105588969A (en) * | 2014-10-24 | 2016-05-18 | 中兴通讯股份有限公司 | Measurement apparatus and method for ripple current |
| CN106772115A (en) * | 2015-11-19 | 2017-05-31 | 中车大连电力牵引研发中心有限公司 | Switching Power Supply ripple measurement apparatus and measuring method |
| CN106645873A (en) * | 2016-12-22 | 2017-05-10 | 北京金风科创风电设备有限公司 | Direct-current support capacitor protection method and device and ripple current detection method and device |
| CN106645873B (en) * | 2016-12-22 | 2019-02-26 | 北京金风科创风电设备有限公司 | Direct-current support capacitor protection method and device and ripple current detection method and device |
| CN108008174A (en) * | 2017-06-30 | 2018-05-08 | 宁波方太厨具有限公司 | A kind of power supply ripple voltage check device |
| CN108879616A (en) * | 2018-07-26 | 2018-11-23 | 奥克斯空调股份有限公司 | A kind of capacitor ripple current protective device, method and air conditioner |
| CN113640694A (en) * | 2020-04-26 | 2021-11-12 | 中移(成都)信息通信科技有限公司 | Ripple noise test probe and test device |
| CN113640694B (en) * | 2020-04-26 | 2023-10-27 | 中移(成都)信息通信科技有限公司 | Ripple noise test probe and test device |
| CN111983299A (en) * | 2020-10-26 | 2020-11-24 | 南京容测检测技术有限公司 | AC power line ripple detector for electromagnetic compatibility test |
| CN113933738A (en) * | 2021-09-08 | 2022-01-14 | 国网甘肃省电力公司电力科学研究院 | Monitoring method and device for switching power supply |
| CN113933738B (en) * | 2021-09-08 | 2024-04-16 | 国网甘肃省电力公司电力科学研究院 | Monitoring method and device for switching power supply |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202057732U (en) | Capacitor and device for detecting ripple current of high-voltage aluminium electrolytic capacitor of switch power supply | |
| CN205193153U (en) | Voltage detecting analytical equipment | |
| CN202948068U (en) | Measuring device for measuring conductivity of solution excited by two kinds of sine wave signals arranged in a superposing way and having different frequencies | |
| CN203037775U (en) | Fault detection device for metering current transformer | |
| CN103487659A (en) | Method for detecting breaker loop resistor based on high impulse currents | |
| CN110275114A (en) | Accumulator internal resistance on-line monitoring method based on combined filter algorithm | |
| CN201489070U (en) | Arrester detecting device | |
| CN201514470U (en) | Switch power supply testing instrument | |
| CN104698316A (en) | Connection state detecting circuit, battery internal resistance detecting device and battery tester | |
| CN104678134A (en) | AC constant current source, internal resistance detecting device of cell and cell testing instrument | |
| CN202339390U (en) | Bad contact detection device for instrument test line | |
| CN107238750A (en) | A kind of network wave method for detecting based on discharge circuit | |
| CN204514975U (en) | AC constant-current source, internal resistance of cell pick-up unit and cell tester | |
| CN101957436A (en) | Power supply quality tester of IT (Information Technology) server equipment and test method | |
| CN208937682U (en) | Lithium electricity energy storage backup power supply system high-voltage isulation detection circuit | |
| CN207488377U (en) | Response time measurement device | |
| CN1797014A (en) | Detection method for testing current in resistance property of lightning arrester | |
| CN102901854A (en) | Full-automatic, multi-parameter, wide-range and low-cost radio link control (RLC) testing device | |
| CN201417260Y (en) | Fractional-octave type insulator equivalent salt deposit density measuring instrument | |
| CN114609430A (en) | Alternating current direction test circuit | |
| CN202562973U (en) | Triple waveform signal generator | |
| CN204241606U (en) | Detection module and pick-up unit | |
| CN204882712U (en) | Electric wire netting harmonic electric energy measuring device based on DSP | |
| CN113917257B (en) | Dynamic tracking and monitoring method and system for internal resistance of energy storage power station | |
| CN102662093A (en) | Three-type waveform signal generator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: SHENZHEN SKYWORTH DIGITAL TECHNOLOGY CO., LTD. Free format text: FORMER NAME: SKY-WORTH DIGITAL TECHNOLOGY CO., LTD.;SHENZHEN CITY |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 518000 Guangdong city of Shenzhen province Nanshan District Gao Xin Road Building A14, SKYWORTH Patentee after: Shenzhen Skyworth Digital Technology Co., Ltd. Address before: 518000 Guangdong city of Shenzhen province Nanshan District Gao Xin Road Building A14, SKYWORTH Patentee before: Shenzhen Skyworth Digital Technology Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111130 Termination date: 20200223 |