Phase-change switch

A technology of commutation switch and power supply, which is applied in the direction of electric switch, multi-phase network asymmetry reduction, multi-phase network elimination/reduction of asymmetry, etc., which can solve problems such as current imbalance, fire, motor heating, etc., to avoid motor reverse effect

CN113539708AActive Publication Date: 2021-10-22TIANJIN SVRUI INTELLIGENT ELECTRICAL CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2021-10-22

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Abstract

The invention discloses a phase-change switch, and the switch comprises an insulating shell, power supply wire inlet ends, power supply wire outlet ends, at least one moving contact and at least two static contacts; the power supply wire inlet ends comprise a first power supply wire inlet end and a second power supply wire inlet end, and the power supply wire outlet ends comprise a first power supply wire outlet end and a second power supply wire outlet end. The second power supply wire inlet end is electrically connected with the second power supply wire outlet end through the static contact and the moving contact, the first power supply wire inlet end is directly and electrically connected with the first power supply wire outlet end, and the first power supply wire outlet end and the second power supply wire outlet end are insulated from each other. According to the invention, one path of power supply wire outlet end is directly communicated with one path of power supply wire inlet end, so only part of current can be converted during commutation, and inter-phase current balance can be achieved more favorably.
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Description

technical field

[0001] The invention relates to the field of low-voltage electrical appliances, in particular to a phase change switch applied to unbalanced three-phase loads. Background technique

[0002] In my country's current low-voltage power distribution three-phase four-wire power grid, single-phase loads account for the majority. These single-phase loads have large irregularities due to actual application conditions and time distribution, resulting in serious three-phase current imbalances in the power grid. Problems, it is easy to cause single-phase current or excessive central line, increase the copper loss and iron loss of the line and transformer, lead to line overload or short circuit, and even lead to high temperature and fire of the cable, causing fire accidents, which is not conducive to power supply safety.

[0003] As a typical application to solve the three-phase unbalance problem, the phase-change switch has been used more and more. The existing phase-chan...

Examples

Embodiment Construction

[0034] Features and exemplary embodiments of various aspects of the invention will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is only to provide a better understanding of the present invention by showing examples of the present invention. The present invention is by no means limited to any specific configuration set forth below, but covers any modification, substitution and improvement of elements, components without departing from the spirit of the invention. In the drawings and the following description, well-known structures and techniques have not been shown in order to avoid unnecessarily obscuring the present invention.

[0035] For the convenience of d...