CN102375093A - Capacitance value attenuation detection circuit of capacitor for rectification filter and method using same - Google Patents
Capacitance value attenuation detection circuit of capacitor for rectification filter and method using same Download PDFInfo
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- CN102375093A CN102375093A CN2010102489777A CN201010248977A CN102375093A CN 102375093 A CN102375093 A CN 102375093A CN 2010102489777 A CN2010102489777 A CN 2010102489777A CN 201010248977 A CN201010248977 A CN 201010248977A CN 102375093 A CN102375093 A CN 102375093A
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Abstract
The invention provides a capacitance value attenuation detection circuit of a capacitor for rectification filter. The capacitance value attenuation detection circuit comprises a capacitor, a standby power supply device and an isolation device, wherein the capacitor is used for receiving a rectification ripple voltage; the standby power supply device is connected with the capacitor and is used for outputting power supply when detecting; a detection circuit connected with one side of the capacitor is formed by connecting a detection switch and a resistor in series; and the isolation device is connected in series between the output ends of the capacitor and the detection circuit and the standby power supply device to prevent the standby power supply from discharging for the capacitor and the detection circuit. The invention further provides a detection method using the detection circuit. According to the method provided by the invention, the capacitor is charged or discharged to generate a peak-peak value and a discharging time value, and then the capacitance value is calculated according to the peak-peak value, the discharging time value and a resistance value. The detection circuit and detection method provided by the invention can be used for detecting the capacitance value attenuation of the capacitor without switching off.
Description
Technical field
The present invention relates to a kind of rectifying and wave-filtering with the capacitance of capacitor decay testing circuit and method thereof, particularly a kind of can be still in running at UPS, utilize the ripple voltage of rectification circuit to detect the circuit of capacitance.
Background technology
The deterioration of capacitor can reduce its filter effect; Cause the dc voltage ripple to become big, and then energy storage device is damaged, energy storage device is valuable device; And be equipment important in the UPS, so the protection of energy storage device is needed to be set about by capacitor earlier; Cause the reason of capacitor deterioration mostly to be the temperature of long-term operation, make the withered capacitance decay that has influence on capacitor of capacitor electrolyte inside.Fast-developing because of science and technology in recent years; The use of various electronic devices and precision equipment is also day by day general; Requirement to UPS power supply degree of stability also more is to pay attention to, in the UPS running, as detecting the direct current capacitors degradation; All need earlier power supply to be switched to change to do power supply, let UPS be under the stopped status and do detection by other power supplys.The invention solves above-mentioned problem, let UPS in normal operation, detect the operation of capacitor, and do not influence the consumer of UPS output terminal.
Summary of the invention
Rectifying and wave-filtering provided by the invention is with the capacitance decay testing circuit and the method thereof of capacitor; Be for overcoming existing capacitor in testing process; Need earlier equipment downtime just can be detected the capacitance of capacitor, can't be in the still on-stream technical matters that detects and do not influence the output consumer of UPS.
It is following that the present invention solves the technical scheme that its technical matters takes:
The present invention provides the capacitance decay testing circuit of a kind of rectifying and wave-filtering with capacitor, includes: at least one capacitor, in order to receive the rectification ripple voltage; One stand-by power supply device, said stand-by power supply device is connected with this capacitor, output power supply during in order to detection, wherein: one is connected in the testing circuit of said capacitor one side, and this testing circuit comprises at least one detector switch and at least one resistor in series composition; And a spacer assembly, series connection is located between the output terminal and stand-by power supply device of this capacitor and testing circuit, prevents that said stand-by power supply device from discharging to capacitor and testing circuit.
According to design of the present invention, said spacer assembly composes in parallel for several diodes.
According to design of the present invention, said spacer assembly composes in parallel for several unidirectional conducting thyratrons.
According to design of the present invention, said stand-by power supply device is an energy-storage travelling wave tube.
According to design of the present invention, said stand-by power supply device is a DC power supply.
The present invention also provides the capacitance decay detection method of a kind of rectifying and wave-filtering with capacitor simultaneously, and wherein, this method comprises the following steps:
Provide a rectification ripple voltage to a capacitor and a testing circuit; Said rectification ripple voltage maximal value is lower than the voltage of a stand-by power supply device; Make the stand-by power supply device through spacer assembly isolation rectification ripple voltage, let the output electricity consumption change by the stand-by power supply device provisioning;
Guide said rectification ripple voltage through the resistor of testing circuit, the action that capacitor is discharged and recharged and produce peak-to-peak value and discharge time value, its by peak-to-peak value, discharge time value and resistance value can extrapolate capacitance.
According to design of the present invention, when the output utilization voltage of said stand-by power supply device was lower than the rectification ripple voltage, spacer assembly was that conducting lets the rectification ripple voltage supply the output electricity consumption simultaneously.
According to design of the present invention, said rectification ripple voltage is a full-wave rectified voltage.
According to design of the present invention, said rectification ripple voltage is a half-wave rectification voltage.
That is to say; A side that the invention provides at capacitor is connected with testing circuit; Testing circuit is made up of detector switch and resistor in series, and the spacer assembly of between the output terminal of capacitor and testing circuit and stand-by power supply device, connecting, and prevents that the stand-by power supply device from discharging to capacitor and testing circuit; Said spacer assembly can be composed in parallel by several diodes or several unidirectional conducting thyratrons, can avoid single failure of removal open circuit; Utilization offers capacitor one rectification ripple voltage, and said rectification ripple voltage maximal value is lower than the voltage of stand-by power supply device, makes spacer assembly isolation rectification ripple voltage, lets the output electricity consumption change and is supplied by the stand-by power supply device; Capacitor receives the rectification ripple voltage via the conduction detection circuit, makes capacitor carry out the action that discharges and recharges by resistor, and then by the purpose that is able to calculate capacitance in the charge and discharge process.The invention reside in the detection mode that solves existing capacitor deterioration; Utilize rectifier to change the magnitude of voltage of rectification ripple voltage; Carry out the detection of capacitance with capacitor and resistor; The output consumer is by the power supply of stand-by power supply device in its testing process, and can reach does not need to export the electricity consumption commentaries on classics by other bypass power supplies in the testing process, and need not shut down running and can detect.
The present invention is capacitance decay testing circuit and the method thereof of a kind of rectifying and wave-filtering with capacitor; Can be in the UPS normal operation, utilize rectifier adjustment rectification ripple voltage value, can detect capacitance through the resistor of capacitor and testing circuit; The output electricity consumption is by the stand-by power supply device provisioning in the testing process; If stand-by power supply device electric voltage exception can be exported electricity consumption by the supply of rectification ripple voltage by the conducting spacer assembly, make the output electricity consumption that the secret worry of power failure not arranged because of testing process.
By above-mentioned explanation, the present invention has following beneficial functional:
1, can in the UPS normal operation, can detect the capacitance of capacitor, and not influence the output consumer.
2, spacer assembly is composed in parallel by several diodes or unidirectional conducting thyratron, can avoid single failure of removal open circuit to supply power to output.
Description of drawings
Fig. 1 is a capacitor degradation circuit diagram of the present invention.
Fig. 2 is the single-phase full wave oscillogram of rectification ripple voltage of the present invention.
Fig. 3 is the circuit diagram of several capacitor utilizations of the present invention.
Fig. 4 is a waveform rectification circuit application circuit of the present invention.
Fig. 5 is another circuit structure diagram of waveform rectification circuit of the present invention.
Fig. 6 is the single-phase half-wave oscillogram of rectification ripple voltage of the present invention.
Fig. 7 implements illustration for rectification circuit one of the present invention.
Another implements illustration to Fig. 8 for rectification circuit of the present invention.
Embodiment
Please with reference to Fig. 1 and shown in Figure 2, rectifying and wave-filtering of the present invention includes with the capacitance decay testing circuit and the method thereof of capacitor:
One rectification circuit 1; Be formed in parallel by several phase-control circuits 11; And several phase-control circuits 11 externally are connected with the noise that a filter inductance 7 can filter externally fed respectively, and said phase-control circuit 11 is made up of several thyratrons 112, in order to provide rectification ripple voltage 9 to capacitor 2.
At least one capacitor 2, capacitor 2 is connected with rectification circuit 1, receives the rectification ripple voltage 9 of rectification circuit 1.
One stand-by power supply device 3, said stand-by power supply device 3 is connected with capacitor 2, output power supply during in order to detection, stand-by power supply device 3 can be the energy-storage travelling wave tube 31 or the DC power supply 32 (as shown in Figure 3) of battery.
One is connected in the testing circuit 4 of a side of said capacitor 2, and testing circuit 4 comprises that at least one detector switch 41 and at least one resistor 42 are composed in series.
One spacer assembly 5, series connection is located between the output terminal and stand-by power supply device 3 of capacitor 2 and testing circuit 4, prevents that 3 pairs of capacitors 2 of said stand-by power supply device and testing circuit 4 from discharging; Spacer assembly 5 can be that several diodes 51 compose in parallel or several unidirectional conducting thyratrons 52 compose in parallel, and please with reference to shown in Figure 3, can avoid the unusual open circuit of single inefficacy can't be to the output power supply, and above-mentioned unidirectional conducting thyratron 52 can be thyristor.
Please with reference to Fig. 1 and shown in Figure 2; The object of the invention can still can detect capacitance C at UPS in running; It is through several phase-control circuits 11 of control rectification circuit 1; Close one of them phase-control circuit 11 and complete other thyratron 112 of conducting, make the rectification ripple voltage 9 that offers capacitor 2 be the single-phase full wave commutating voltage, its rectification ripple voltage 9 voltage max are lower than stand-by power supply device 3 output voltages; Let the low rectification ripple voltage 9 of spacer assembly 5 isolation voltages, UPS output electricity consumption is supplied power by stand-by power supply device 3; When accomplishing isolation stand-by power supply device 3, can make resistor 42 and capacitor 2 reach electric connection by conduction detection switch 41; Resistor 42 guiding rectification ripple voltages 9 through testing circuit 4; The action that capacitor 2 is continued to discharge and recharge is to detect voltage max V
Max91 and voltage minimum V
Min92, please with reference to shown in Figure 2, saturated to relay electricity again be voltage max V moment when capacitor 2 charges to
Max91, it is voltage minimum V that the moment of charging is changeed in its capacitor 2 discharges
Min92, utilize voltage max V again
Max91 with voltage minimum V
Min92 to obtain peak-to-peak value be Δ V93 (Δ V=V
Max-V
Min) and the direct current average voltage level
Its voltage max V
Max91 are changed to voltage minimum V
Min92 time is to be worth T95 discharge time, utilizes direct current average voltage level V
DC94 calculate I with the resistor 42 of known value R of the present invention
DC 
Discharge charge Q (Q=Δ V * C=I because of capacitor 2
DC* T), can be through detecting V
Max91, V
Min92 and T95, utilize above-mentioned numerical value can calculate capacitance C again
Can know the degradation of capacitor 2 by capacitance C.
Please with reference to Fig. 1 and shown in Figure 2; If when the voltage of the output electricity consumption of generation stand-by power supply device 3 is lower than rectification ripple voltage 9 in testing process; Its said spacer assembly 5 is that conducting lets rectification ripple voltage 9 supply output electricity consumptions, lets the secret worry that does not have power failure in the testing process.
Please with reference to shown in Figure 3, capacitor 2 of the present invention can be made up of several electric capacity in series or in parallel with each other, and its capacitance C that detects is the total capacitance value C of whole capacitors 2.
Please with reference to Fig. 2 and shown in Figure 4; Rectification ripple voltage 9 of the present invention can be provided by another waveform rectification circuit 6; Said waveform rectification circuit 6 is made up of several diode 61 mutual SP and is accepted externally fed, and waveform rectification circuit 6 is connected with capacitor 2, in testing process; Close rectification circuit 1 and start waveform rectification circuit 6 generation rectification ripple voltages 9 and give capacitor 2, waveform rectification circuit 6 is the single-phase full wave commutating voltage with the rectification ripple voltage 9 that rectification circuit 1 is provided; Please with reference to shown in Figure 5; Rectification ripple voltage 9 of the present invention can be single phase half wave rectification voltage; Utilize 6 of above-mentioned waveform rectification circuits to be connected with capacitor 2 by a diode 61 series connection externally feds, so that the rectification ripple voltage 9 of single phase half wave rectification voltage to be provided, as shown in Figure 6.
Please with reference to Fig. 2 and shown in Figure 7; Rectification circuit of the present invention 1 is applicable to the low capacity electric power system for single-phase high merit because of the type rectifier charging circuit; Form by the parallel connection in regular turn of two control circuits 12 and a transistor switch 15 and at output series connection one diode 14; Said control circuit 12 is that two diodes 14 are in series, and wherein 12 pairs of control circuits are externally connected with the noise that a filter inductance 7 can filter externally fed, and present embodiment utilizes the 15 not conductings of oxide-semiconductor control transistors switch; Make rectification ripple voltage 9 that rectification circuit 1 provides the single-phase full wave commutating voltage to capacitor 2 and testing circuit 4, detect capacitance C.
Please with reference to Fig. 2 and shown in Figure 8; Rectification circuit of the present invention 1 is applicable to the high capacity electric power system for the high merit of three-phase because of the type rectifier charging circuit; Composed in parallel by several commutation circuits 13, commutation circuit 13 is in series by two diodes 14, and is parallel with a transistor switch 15 in diode 14; Several commutation circuits 13 are respectively to being externally connected with a filter inductance 7 and a derailing switch 8 to receive externally fed; Its embodiment is a wherein derailing switch 8 not conductings of control, and lets rectification circuit 1 interior all crystals pipe switch 15 all become not on-state, and the rectification ripple voltage 9 that makes rectification circuit 1 offer capacitor 2 and testing circuit 4 is the single-phase full wave commutating voltage.
Claims (9)
1. a rectifying and wave-filtering includes with the capacitance decay testing circuit of capacitor: at least one capacitor (2), in order to receive rectification ripple voltage (9); One stand-by power supply device (3); Said stand-by power supply device (3) is connected with this capacitor (2); Output power supply during in order to detection; It is characterized in that: one is connected in the testing circuit (4) of a side of said capacitor (2), and this testing circuit (4) comprises that at least one detector switch (41) and at least one resistor (42) are composed in series; And a spacer assembly (5), series connection is located between the output terminal and stand-by power supply device (3) of capacitor (2) and testing circuit (4), prevents that said stand-by power supply device (3) from discharging to capacitor (2) and testing circuit (4).
2. rectifying and wave-filtering as claimed in claim 1 is with the capacitance decay testing circuit of capacitor, and it is characterized in that: said spacer assembly (5) composes in parallel for several diodes (51).
3. rectifying and wave-filtering as claimed in claim 1 is with the capacitance decay testing circuit of capacitor, and it is characterized in that: said spacer assembly (5) composes in parallel for several unidirectional conducting thyratrons (52).
4. rectifying and wave-filtering as claimed in claim 1 is with the capacitance decay testing circuit of capacitor, and it is characterized in that: said stand-by power supply device (3) is an energy-storage travelling wave tube (31).
5. rectifying and wave-filtering as claimed in claim 1 is with the capacitance decay testing circuit of capacitor, and it is characterized in that: said stand-by power supply device (3) is a DC power supply (32).
6. a rectifying and wave-filtering is characterized in that with the capacitance decay detection method of capacitor this method comprises the following steps:
Provide a rectification ripple voltage (9) to give a capacitor (2) and a testing circuit (4); Said rectification ripple voltage (9) maximal value is lower than the voltage of a stand-by power supply device (3); Make stand-by power supply device (3) through spacer assembly (5) isolation rectification ripple voltage (9), let the output electricity consumption change and supply by stand-by power supply device (3);
Resistor (42) guiding said rectification ripple voltage (9) through testing circuit (4), the action that capacitor (2) is discharged and recharged and produce peak-to-peak value and discharge time value, its by peak-to-peak value, discharge time value and resistance value can extrapolate capacitance.
7. rectifying and wave-filtering as claimed in claim 6 is with the capacitance decay detection method of capacitor; It is characterized in that: when the output utilization voltage of said stand-by power supply device (3) was lower than rectification ripple voltage (9), spacer assembly (5) was that conducting lets rectification ripple voltage (9) supply the output electricity consumption simultaneously.
8. rectifying and wave-filtering as claimed in claim 6 is with the capacitance decay detection method of capacitor, and it is characterized in that: said rectification ripple voltage (9) is a full-wave rectified voltage.
9. rectifying and wave-filtering as claimed in claim 6 is with the capacitance decay detection method of capacitor, and it is characterized in that: said rectification ripple voltage (9) is a half-wave rectification voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102489777A CN102375093A (en) | 2010-08-05 | 2010-08-05 | Capacitance value attenuation detection circuit of capacitor for rectification filter and method using same |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010102489777A CN102375093A (en) | 2010-08-05 | 2010-08-05 | Capacitance value attenuation detection circuit of capacitor for rectification filter and method using same |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103546045A (en) * | 2013-10-28 | 2014-01-29 | 中国东方电气集团有限公司 | Method for calculating capacitance value of direct current capacitor of three-phase uncontrolled rectifying device |
| CN104111382A (en) * | 2014-07-09 | 2014-10-22 | 华为技术有限公司 | Capacitance detection method and device for capacitor |
| CN107293319A (en) * | 2016-04-01 | 2017-10-24 | 北京忆恒创源科技有限公司 | Stand-by power supply detection method and device |
| CN110389258A (en) * | 2018-04-16 | 2019-10-29 | 新疆金风科技股份有限公司 | Super capacitor capacitance detection method and device, wind power generating set |
| US10534029B1 (en) | 2018-12-07 | 2020-01-14 | Chicony Power Technology Co., Ltd. | Power conversion apparatus |
| CN113447737A (en) * | 2021-06-12 | 2021-09-28 | 四川虹美智能科技有限公司 | Electrolytic capacitor monitoring method in air conditioner variable frequency controller |
| CN114034902A (en) * | 2021-09-28 | 2022-02-11 | 海信（山东）空调有限公司 | Phase voltage detection method and device, variable frequency air conditioner and control method and device thereof |
| CN114375402A (en) * | 2019-09-19 | 2022-04-19 | 三菱电机株式会社 | Power supply device and life diagnosis method |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103546045B (en) * | 2013-10-28 | 2016-04-06 | 中国东方电气集团有限公司 | A kind of three-phase uncontrollable rectifier device DC capacitor capacitance computational methods |
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| CN110389258B (en) * | 2018-04-16 | 2021-10-26 | 新疆金风科技股份有限公司 | Super-capacitor capacitance value detection method and device and wind generating set |
| CN110389258A (en) * | 2018-04-16 | 2019-10-29 | 新疆金风科技股份有限公司 | Super capacitor capacitance detection method and device, wind power generating set |
| US10534029B1 (en) | 2018-12-07 | 2020-01-14 | Chicony Power Technology Co., Ltd. | Power conversion apparatus |
| CN114375402A (en) * | 2019-09-19 | 2022-04-19 | 三菱电机株式会社 | Power supply device and life diagnosis method |
| CN114375402B (en) * | 2019-09-19 | 2023-06-20 | 三菱电机株式会社 | Power supply device and life diagnosis method |
| CN113447737B (en) * | 2021-06-12 | 2022-09-13 | 四川虹美智能科技有限公司 | Electrolytic capacitor monitoring method in air conditioner variable frequency controller |
| CN113447737A (en) * | 2021-06-12 | 2021-09-28 | 四川虹美智能科技有限公司 | Electrolytic capacitor monitoring method in air conditioner variable frequency controller |
| CN114034902A (en) * | 2021-09-28 | 2022-02-11 | 海信（山东）空调有限公司 | Phase voltage detection method and device, variable frequency air conditioner and control method and device thereof |
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