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Switching device for conducting and interrupting electrical currents

A switchgear and current cut-off technology, applied in the field of switchgear, can solve the problems of associated life reduction and large load of triodes

Active Publication Date: 2018-11-09
EATON INTELLIGENT POWER LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the current to be switched is very high, this can lead to a considerable loading of the triac and thus to an associated reduced lifetime

Method used

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  • Switching device for conducting and interrupting electrical currents
  • Switching device for conducting and interrupting electrical currents
  • Switching device for conducting and interrupting electrical currents

Examples

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Embodiment Construction

[0023] figure 1 A block diagram of a switching device according to the invention for a polarity-independent 2-pole switching arrangement is shown. The connections of the two poles of the switching device are indicated by L1, T-1 and L2, T2, respectively. In terms of circuit technology, the switchgear largely corresponds to that described in the published German patent application DE 10 2013 114 259 A1 and described here in figure 1 The devices shown in . The inventive device described below differs in the circuit electronics 50, which are designed for the specific control of the semiconductor switch 20, as will be explained in detail in the following description. The switching electronics 50 can be implemented, for example, by a processor and a memory, in particular a microcontroller, wherein a program is stored in the memory, the program configuring the processor to perform method steps implementing the described The dedicated control of the semiconductor switch 20 by the ...

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Abstract

The invention relates to a switching device for conducting and interrupting electrical currents, comprising a first mechanical contact assembly (10), a semiconductor switch (20) connected in parallelto the first mechanical contact assembly, a second mechanical contact assembly (30) connected in series to the first mechanical contact assembly, and switching electronics (50) designed to switch thesemiconductor switch (20) on and off. According to the invention, the switching electronics (50) are designed, during a closing process of the first mechanical contact assembly (10), to switch on thesemiconductor switch (20) at the end of a first specified time period t-0 after the initialisation of the switching electronics (50), and to switch the same off again at the end of a second specifiedtime period t-1, wherein the first specified time period t-0 is adjusted by the switching electronics (50) according to the first mechanical contact assembly (10).

Description

technical field [0001] The present invention relates to a switchgear for conducting and breaking current, in particular a hybrid switching assembly for conducting and breaking high DC current and low frequency AC current, and a switchgear having such a switchgear. Background technique [0002] German Published Patent Application DE 10 2013 114 259 A1 describes an advantageous variant of a hybrid switching assembly in which the time of the current load of the power semiconductors is minimized for the longest possible life expectancy and the smallest possible size, especially for the current range It is important for power contactors with hundreds of amperes. In order to minimize the duration of the load current flowing through the power semiconductors, the commutation instants are captured by the current converters and the current flow through the semiconductors is only maintained until a sufficient electrical strength has been achieved for the opened mechanical switching pat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H9/54H01H33/04H01H33/59
CPCH01H9/542H01H33/04H01H33/596H01H2009/544G06K7/10366H01H9/56H01H47/22H03K17/28
Inventor G·施米茨J·迈斯纳M·乌德尔霍芬M·沃朗O·克雷夫特
Owner EATON INTELLIGENT POWER LTD
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