Switching arrangement for interconnecting electrolytic capacitors

Abstract

Switching arrangement for interconnecting electrolytic capacitors that comprises an electronic switch formed by a semiconductor device and a delay member. The semiconductor device has a control input which is, through an RC-type delay member, connected to a control input (VS) supplying the switching signal. The switching arrangement has a predetermined switching delay. The semiconductor device is a field effect transistor (FT), whose main circuit is coupled through an inductive element (L) supplying a second delay, to the capacitor (C1) to be switched. The inductive element (L) is a conductor (10) of determined length surrounded by a high-frequency ferrite core (11, 12). The delay effected by the RC member ensures only that fraction of the switching delay at which the device is loaded within its permissible load limit and the remaining delay is supplied by the inductive element (L).

Description

technical field [0001] The invention relates to a switching device for controlled parallel switching of an electrolytic capacitor having a capacitance of at least 500 μF to another energy storage electrolytic capacitor. The arrangement comprises an electronic switch formed by a semiconductor device having a control input connected to the control input providing a switching signal via a resistive-capacitive (RC) type delay member, and a delay element. The switching device has a switching delay of a defined duration. Background technique [0002] When a capacitor charged with energy is suddenly discharged or charged, a very large transient current will flow within a certain period of time, which may damage both the capacitor and the switching device implementing the transient process. [0003] In Published Hungarian Patent Application No. P9902383, a battery charging circuit comprising a capacitor is disclosed. The switch increases the capacitance of the capacitor by switchi...

AI Technical Summary

Problems solved by technology

[0009] Since the described requirements contradict each other, that is, a high-capacity electrolytic capacitor that contains a lot of energy must be connected in parallel with another relatively low-energy, but also high-capacity electrolytic capacitor, and in which it is necessary to influence the transient process formed as little as possible , so far such tasks can only be solved using opening and closing contacts

However, in terms of its cost, speed, ease of control and its low level of reliability, the solution utilizing mechanical joints compares unfavorably with the use of other convenient, fast and reliable electronic devices

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