AC non-arc switch electric appliance

A technology of arc-free switches and electrical appliances, which is applied in the direction of electric switches, circuits, electrical components, etc., can solve the problems of large power consumption of components, shutdown, power consumption, and heat dissipation problems, and achieve quality and technological content. The effect of performance, reliable technical performance

Inactive Publication Date: 2004-11-24
FUZHOU UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

[0003] Therefore, the current basic contradiction is: although the detection speed of electronic technology is very fast and the precision is very high, it can quickly detect the zero-crossing point of the current in the circuit and give feedback, but the mechanical action mechanism cannot accurately move at the zero-crossing point. If there is a deviation, it is possible to turn off near the current peak value, resulting in a large arc and making it difficult to extinguish the arc.
For three-phase AC switching appliances, which are more widely used than single-phase AC switching appliances, the phase sequence of the three-phase AC currents differs by 120°, and it is impossible to cross zero at the same time, which brings greater difficulties to arc ex

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Embodiment Construction

[0019] (1) Description of the anti-phase induction current generator:

[0020] figure 1 It is a schematic diagram of the cross-sectional structure of the anti-phase induced current generator, including conductors, iron cores, main and auxiliary windings. figure 2 It is the equivalent circuit schematic diagram of the anti-phase induction current generator, including the conductor, the iron core and the main and auxiliary windings. The conductor is connected in series in the main circuit, which is a part of the main circuit. The conductor and the iron core are separated by an insulating layer, and the conductor is radially fixed in the iron core by protruding protruding teeth around it. Due to the limited surface area of ​​the containing conductor, the iron core generally adopts a two (pair) magnetic pole structure. The main winding (working winding) of the two-pole structure is placed in pairs, and the auxiliary winding (secondary winding) is arranged at a position orthogonal...

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Abstract

The present invention relates to an AC non-arcing switch electric equipment, including conductor series-connected in its main circuit, iron core which are formed into the out-of-phase induced current generator with the said conductor together, main winding, auxiliary winding and phase-shifting element, executive main contact point of switch and control circuit with the function of self-locking by utilizing working current induction and automatic unlocking after the working current is passed through zero. Said invention also provides its working principle, and under the condition of non-producing electric arc it can cut off the power supply of working circuit.

Description

Technical field: [0001] The invention relates to an AC arcless switching device. Background technique: [0002] The work of the switch is to turn on or off the working circuit. The arc generated when the circuit is turned off and its extinguishment are the main problems faced by the switch. The larger the capacity, the more difficult it is to extinguish the arc. Therefore, extinguishing the arc is a technical problem of the switch. center and key. Existing switching appliances focus on "arc extinguishing", that is, when the switching appliance shuts off the circuit and generates an arc, try to extinguish it. The best time to extinguish the arc in the AC circuit is to turn off the switching device when the AC current crosses zero. The operating frequency of the power grid is generally 50HZ or 60HZ, that is, the current must cross zero 100 or 120 times per second. Since the current zero-crossing time is extremely short, it is difficult to realize the shutdown at this instant...

Claims

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Application Information

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IPC IPC(8): H01H9/54
Inventor 陈坚
Owner FUZHOU UNIV
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