Controllable switch and its control method

A switch and mechanical switch technology, applied in the field of switches, can solve the problems of large temperature rise of thyristor, easy breakdown and failure of thyristor, and achieve the effects of low loss, precision and high reliability

Inactive Publication Date: 2016-04-06
珠海市伏安达电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1. When the thyristor is powered on, the temperature rises greatly, and a cooling system must be installed;
[0004] 2. The thyristor is easily broken down and fails;
[0005] 3. The frequent on and off of the SCR will form a harmonic source

Method used

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  • Controllable switch and its control method
  • Controllable switch and its control method
  • Controllable switch and its control method

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Embodiment Construction

[0042] The present invention will be described in detail below with reference to the accompanying drawings and examples. It should be noted that, in the case of no conflict, the following embodiments and features in the embodiments can be combined with each other.

[0043] In one embodiment of the present invention, a controllable switch is provided, such as figure 1 As shown, the controllable switch 100 includes a mechanical switch 110 and a control device 120, the mechanical switch 110 has an input end 111 for connecting a power supply and an output end 112 for connecting a load, and the control device 120 is used for controlling the The mechanical switch 110 is turned on and off. Preferably, the mechanical switch 110 is a relay or an AC contactor.

[0044] Such as figure 2 As shown, the control device 120 includes a period calculation module 121, an on / off calculation module 122 and a control module 123, wherein the period calculation module 121 is used to calculate the...

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Abstract

The invention discloses a controllable switch and a control method of the controllable switch. The controllable switch comprises a mechanical switch and a control device, wherein the mechanical switch is provided with the input end used for being connected with a power source and the output end used for being connected with loads; the control device is used for controlling the mechanical switch to be turned on or off, the control device comprises a period calculation module, an on-off calculation module and a control module, and the period calculation module is used for calculating the period T of periodic signals of the input end or the output end of the mechanical switch; the on-off calculation module is used for calculating the turning-on lead time Tt2 according to the period T, the turning-on action time Tt1 of the mechanical switch and the preset turning-on angle theta t and for calculating the turning-off lead time Td2 according to the period T, the turning-off action time Tt2 of the mechanical switch and the preset turning-off angle theta d; the control module is used for controlling the mechanic switch to be turned on or off according to the turning-on lead time Tt2 and the turning-off lead time Td2. The controllable switch has the advantages of being high in reliability, low in loss and high in accuracy.

Description

technical field [0001] The invention relates to a switch, in particular to a controllable switch and a control method thereof. Background technique [0002] A controllable switch refers to a switch that can be turned on and off precisely at a set moment. At present, most of the controllable switches use the voltage zero-crossing conduction and current zero-crossing cut-off characteristics of the thyristor to achieve controllable on-off. This controllable switch has the following defects: [0003] 1. When the thyristor is powered on, the temperature rises greatly, and a cooling system must be installed; [0004] 2. The thyristor is easily broken down and fails; [0005] 3. Frequent switching on and off of the thyristor will form a harmonic source. Contents of the invention [0006] In view of the above-mentioned current state of the art, the technical problem to be solved by the present invention is to provide a controllable switch with high reliability, low loss and hig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H3/22
Inventor 陈贤刘洋周飞勇
Owner 珠海市伏安达电子科技有限公司
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