Power supply for testing high-frequency ripple durability of electrolytic capacitor

Abstract

The invention provides a power supply for testing high-frequency ripple durability of an electrolytic capacitor; the power supply comprises an alternating current constant current source, an adjustable direct current power supply and an electrolytic capacitor CT to be tested; the alternating current constant current source is connected with the adjustable direct current power supply in series, and an output direct current voltage with alternating current ripples is applied to the electrolytic capacitor CT to be tested; the alternating-current constant-current source comprises a waveform generator and current amplifiers, the waveform generator is used for generating alternating-current signals such as sine waves, triangular waves, sawtooth waves and square waves, and the output waveform and frequency are adjustable; the current amplifiers are used for amplifying alternating current signals, the multiple current amplifiers are connected in parallel, the input ends of the multiple current amplifiers connected in parallel are connected with the output end of the waveform generator, the current amplifiers are used for increasing output alternating current, and the multiple current amplifiers can be connected in parallel to be expanded at will. The use requirements of electrolytic capacitors with different specifications are met; the power supply is simple in structure, low in cost, small in size and flexible in application.

Description

technical field [0001] The invention relates to the field of power supplies for durability testing of electrolytic capacitors, in particular to power supplies for high-frequency ripple durability testing of electrolytic capacitors. Background technique [0002] The common high-frequency ripple test power supply on the market is the most commonly used equipment for durability testing of electrolytic capacitors. It is bulky and expensive. When used, the most obvious defect is that the output current cannot be evenly distributed to each load connected in parallel ( Electrolytic capacitors), resulting in a large test deviation, if in order to improve the test accuracy, a high-frequency ripple test power supply with a pair of capacitive loads will cause a "big horse-drawn cart" situation, resulting in a great waste of equipment resources , Moreover, the general-purpose high-frequency ripple test power supply has a fixed waveform and frequency, can only output 100KHz sine wave, an...

AI Technical Summary

Problems solved by technology

[0002] The common high-frequency ripple test power supply on the market is the most commonly used equipment for durability testing of electrolytic capacitors. It is bulky and expensive. When used, the most obvious defect is that the output current cannot be evenly distributed to each load connected in parallel ( Electrolytic capacitors), resulting in a large test deviation, if in order to improve the test accuracy, a high-frequency ripple test power supply with a pair of capacitive loads will cause a "big horse-drawn cart" situation, resulting in a great waste of equipment resources , Moreover, the general-purpose high-frequency ripple test power supply has a fixed waveform and frequency, can only output 100KHz sine wave, and cannot change the frequency and waveform, so it is very inflexible to use

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