CN214154347U - Power supply for high-frequency ripple endurance test of electrolytic capacitor - Google Patents
Power supply for high-frequency ripple endurance test of electrolytic capacitor Download PDFInfo
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- CN214154347U CN214154347U CN202120056255.5U CN202120056255U CN214154347U CN 214154347 U CN214154347 U CN 214154347U CN 202120056255 U CN202120056255 U CN 202120056255U CN 214154347 U CN214154347 U CN 214154347U
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Abstract
The utility model provides a power for electrolytic capacitor high frequency ripple durability test, include: the device comprises an alternating current constant current source, an adjustable direct current power supply and an electrolytic capacitor CT to be detected, wherein the alternating current constant current source is connected with the adjustable direct current power supply in series, and the output direct current voltage with alternating current ripples is applied to the electrolytic capacitor CT to be detected; the alternating current constant current source includes: the device comprises a waveform generator and a current amplifier, wherein the waveform generator is used for generating alternating current signals such as sine waves, triangular waves, sawtooth waves, square waves and the like, and outputting adjustable waveforms and adjustable frequency; the current amplifiers are used for amplifying alternating current signals, the current amplifiers are provided with a plurality of current amplifiers, the current amplifiers are connected in parallel, the input ends of the current amplifiers connected in parallel are connected with the output end of the waveform generator and used for increasing the output alternating current, the current amplifiers can be arbitrarily expanded in a mode of connecting the current amplifiers in parallel, and the use requirements of electrolytic capacitors with different specifications are met; the novel intelligent control system is simple in structure, low in cost, small in size and flexible in application.
Description
Technical Field
The utility model relates to a power field of electrolytic capacitor durability test, especially a power that is used for electrolytic capacitor high frequency ripple durability test.
Background
The universal high-frequency ripple test power supply on the market is used as the most common equipment for durability test of electrolytic capacitors, has large volume and high price, and has the most obvious defects in use: the output current can not be evenly distributed to each load (electrolytic capacitor) which is connected in parallel, so that the test is greatly deviated, if in order to improve the test accuracy, one high-frequency ripple test power supply carries a pair of capacitor loads, and the condition of 'big horse pulls a trolley' is caused, so that the equipment resource is greatly wasted, and the universal high-frequency ripple test power supply has fixed waveform and frequency, can only output 100KHz sine waves, can not change the frequency and the waveform, and is not flexible to use.
SUMMERY OF THE UTILITY MODEL
The utility model provides a power for electrolytic capacitor high frequency ripple durability test, small, with low costs, use in a flexible way, and output frequency is adjustable, in order to realize above-mentioned purpose, adopts following technical scheme: the method comprises the following steps: the device comprises an alternating current constant current source, an adjustable direct current power supply and an electrolytic capacitor CT to be detected, wherein the alternating current constant current source is connected with the adjustable direct current power supply in series, and the output direct current voltage with alternating current ripples is applied to the electrolytic capacitor CT to be detected; the alternating current constant current source includes: the device comprises a waveform generator and a current amplifier, wherein the waveform generator is used for generating an alternating current signal; the current amplifiers are used for amplifying alternating current signals, the current amplifiers are provided with a plurality of current amplifiers, the current amplifiers are connected in parallel, the input ends of the current amplifiers connected in parallel are connected with the output end of the waveform generator and used for increasing output alternating current, and the current output sum of the current amplifiers connected in parallel is the total output alternating current.
Preferably, the ac constant current source and the adjustable dc power source are respectively in communication with the operation panel to receive a control command of the operation panel.
Preferably, the positive and negative output ends of the adjustable dc power supply are connected in parallel with a capacitor C1 with low ac impedance, for reducing the ac internal resistance of the adjustable dc power supply.
Preferably, the capacitor C1 is an electrodeless capacitor or an electrolytic capacitor, and the capacitor C1 is formed by connecting multiple capacitors in parallel, and is used for reducing the alternating current impedance of the capacitor C1.
Preferably, the output end of the alternating current constant current source is connected with an AC voltage detection display circuit, the AC voltage detection display circuit is in communication connection with the operation panel, and the AC voltage detection display circuit is used for detecting the high-frequency alternating current voltage in real time and displaying the high-frequency alternating current voltage on the operation panel.
Preferably, the operation panel is in communication with a current detection display circuit, and the current detection display circuit is used for detecting the effective value of the alternating current in the loop in real time and displaying the effective value on the operation panel.
Preferably, the operation panel is connected to a DC voltage detection display circuit in communication, and the DC voltage detection display circuit is configured to detect a DC voltage in real time and display the DC voltage on the operation panel.
The utility model has the advantages that: the output waveform of the waveform generator is selected through the operation panel, can be sine waves, triangular waves, sawtooth waves, square waves and the like, is adjustable in frequency, can be set randomly within 10KHz-150KHz, better meets the actual working condition, and can be used for objectively evaluating the durability of the capacitor on different occasions; the electrolytic capacitor is expanded arbitrarily by connecting a plurality of current amplifiers in parallel, so that the electrolytic capacitor can meet the requirements of electrolytic capacitors with different specifications;
the novel intelligent control system is simple in structure, low in cost, small in size and flexible in application.
Drawings
Fig. 1 is a schematic circuit diagram of the present patent application.
Detailed Description
The present invention will now be further described with reference to the accompanying drawings.
As shown in fig. 1, the present patent application includes: the device comprises an alternating current constant current source, an adjustable direct current power supply and an electrolytic capacitor CT to be detected, wherein the alternating current constant current source is connected with the adjustable direct current power supply in series; the AC constant current source includes: the device comprises a waveform generator and a current amplifier, wherein the waveform generator is used for generating alternating current signals such as sine waves, square waves, sawtooth waves and the like, the frequency and amplitude of an output signal are adjustable, the output signal can be set at will within 10KHz-150KHz, the actual working condition is better met, and the durability of the capacitor under different occasions can be objectively evaluated; the current amplifiers are connected in parallel, the input ends of the current amplifiers connected in parallel are connected with the output end of the waveform generator and used for increasing output alternating current, the sum of the current outputs of the current amplifiers connected in parallel is total output alternating current, the total output alternating current is arbitrarily expanded in a parallel connection mode of the current amplifiers, and the use of electrolytic capacitors with different specifications is met.
The AC constant current source and the adjustable DC power source are respectively communicated with the operation panel, receive the control instruction of the operation panel and set the waveform type, the AC ripple current, the DC bias voltage and the shutdown time of the waveform generator through the operation panel.
The adjustable direct current power supply is used for direct current bias of the capacitor to be measured to ensure that the electrolytic capacitor cannot bear reverse voltage, and the positive output end and the negative output end of the adjustable direct current power supply are connected in parallel with the capacitor C1 with low alternating current impedance to reduce alternating current internal resistance of the adjustable direct current power supply.
The capacitor C1 can be an electrolytic capacitor, a film capacitor or other electrodeless capacitors, and the capacitor C1 is formed by connecting multiple capacitors in parallel and is used for reducing the alternating current impedance of the capacitor C1.
The positive and negative output ends of the alternating current constant current source are connected with an AC voltage detection display circuit, the AC voltage detection display circuit is in communication connection with the operation panel, and the AC voltage detection display circuit is used for detecting high-frequency alternating current voltage in real time and displaying the high-frequency alternating current voltage on the operation panel.
The operation panel is communicated with a current detection display circuit, and the current detection display circuit is used for detecting the effective value of the alternating current in the loop in real time and displaying the effective value on the operation panel.
The operation panel is in communication connection with the DC voltage detection display circuit, and the DC voltage detection display circuit is used for detecting the direct current voltage in real time and displaying the direct current voltage on the operation panel.
The voltage and current detection circuit may employ an active value detection chip such as AD 637.
The waveform generator is selected to output waveforms through the operation panel, the output waveforms can be sine waves, triangular waves, sawtooth waves, square waves and the like, the frequency is adjustable, the output waveforms can be set randomly within 10KHz-150KHz, the actual working condition is better met, and the durability of the capacitor under different occasions can be objectively evaluated; the electrolytic capacitor is expanded arbitrarily by connecting a plurality of current amplifiers in parallel, so that the electrolytic capacitor can meet the requirements of electrolytic capacitors with different specifications; the novel intelligent control system is simple in structure, low in cost, small in size and flexible in application.
Finally, it should be noted that: the above embodiments are only used for illustrating but not limiting the technical solutions of the present invention, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made thereto without departing from the spirit and scope of the invention, and the appended claims are intended to cover such modifications and equivalents as fall within the spirit and scope of the invention.
Claims (7)
1. A power supply for electrolytic capacitor high frequency ripple durability testing, characterized by: the method comprises the following steps: the device comprises an alternating current constant current source, an adjustable direct current power supply and an electrolytic capacitor CT to be detected, wherein the alternating current constant current source is connected with the adjustable direct current power supply in series, and the output direct current voltage with alternating current ripples is applied to the electrolytic capacitor CT to be detected; the alternating current constant current source includes: the device comprises a waveform generator and a current amplifier, wherein the waveform generator is used for generating an alternating current signal; the current amplifiers are used for amplifying alternating current signals, the alternating current amplifiers are provided with a plurality of current amplifiers, the current amplifiers are connected in parallel, the input ends of the current amplifiers connected in parallel are connected with the output end of the waveform generator and used for increasing output alternating current, and the current output sum of the current amplifiers connected in parallel is the total output alternating current.
2. The power supply for electrolytic capacitor high-frequency ripple endurance test of claim 1, wherein: the alternating current constant current source and the adjustable direct current power supply are respectively communicated with the operation panel and receive a control instruction of the operation panel.
3. The power supply for electrolytic capacitor high-frequency ripple endurance test of claim 1, wherein: the positive and negative output ends of the adjustable direct current power supply are connected in parallel with a capacitor C1 with low alternating current impedance for reducing the alternating current internal resistance of the adjustable direct current power supply.
4. The power supply for electrolytic capacitor high-frequency ripple endurance test of claim 3, wherein: the capacitor C1 is an electrodeless capacitor or an electrolytic capacitor, and the capacitor C1 is formed by connecting multiple capacitors in parallel and is used for reducing the alternating current impedance of the capacitor C1.
5. The power supply for electrolytic capacitor high-frequency ripple endurance test according to claim 2, wherein: the output end of the alternating current constant current source is connected with an AC voltage detection display circuit, the AC voltage detection display circuit is in communication connection with the operation panel, and the AC voltage detection display circuit is used for detecting high-frequency alternating current voltage in real time and displaying the high-frequency alternating current voltage on the operation panel.
6. The power supply for electrolytic capacitor high-frequency ripple endurance test according to claim 2, wherein: the operation panel is communicated with a current detection display circuit, and the current detection display circuit is used for detecting the effective value of the alternating current in the loop in real time and displaying the effective value on the operation panel.
7. The power supply for electrolytic capacitor high-frequency ripple endurance test according to claim 2, wherein: the operation panel is in communication connection with the DC voltage detection display circuit, and the DC voltage detection display circuit is used for detecting the direct current voltage in real time and displaying the direct current voltage on the operation panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120056255.5U CN214154347U (en) | 2021-01-11 | 2021-01-11 | Power supply for high-frequency ripple endurance test of electrolytic capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120056255.5U CN214154347U (en) | 2021-01-11 | 2021-01-11 | Power supply for high-frequency ripple endurance test of electrolytic capacitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214154347U true CN214154347U (en) | 2021-09-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120056255.5U Active CN214154347U (en) | 2021-01-11 | 2021-01-11 | Power supply for high-frequency ripple endurance test of electrolytic capacitor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214154347U (en) |
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2021
- 2021-01-11 CN CN202120056255.5U patent/CN214154347U/en active Active
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