Control module adopting three-sampling-two-logic voting

A technology of control module and signal acquisition module, applied in engine components, machines/engines, mechanical equipment, etc., can solve the problems of large demand for relays, many external wirings, and many fault points, so as to improve design and installation efficiency and manufacturing costs. The effect of low cost and lower equipment cost

Pending Publication Date: 2019-08-02
DONGFANG ELECTRIC AUTOMATIC CONTROL ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can realize two-out-of-three voting output, but the disadvantages are also obvious, such as many external connections and many fault points; different DEH system relays have different selections, and maintenance is inconvenient; the demand for relays is large and the cost is high, etc.

Method used

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  • Control module adopting three-sampling-two-logic voting
  • Control module adopting three-sampling-two-logic voting
  • Control module adopting three-sampling-two-logic voting

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] like Figures 1 to 8 As shown, the control module using two-out-of-three logic voting includes a signal acquisition module, a voting module and a signal expansion output module, and is characterized in that: the signal acquisition module includes IN1, IN2 and IN3, and the IN1, IN2 and IN3 are Three active signal input ports and three passive signal input ports, and the two signals of the same number are connected to the same NMOS tube, the NMOS tube is connected to a solid state relay with double normally open contacts, and the voting module includes Two three-contact mechanical relays, the three-contact mechanical relays are all provided with NMOS tubes, and the six contacts of the three double-normally open solid-state relays are two-phase and two-phase and form three out of two logic , the two phases of the solid state relay are connected to the NMOS tube on the three-contact mechanical relay, the signal expansion output module includes a mechanical relay with two no...

Embodiment 2

[0028] like Figures 1 to 8 As shown, the control module using two-out-of-three logic voting includes a signal acquisition module, a voting module and a signal expansion output module, and is characterized in that: the signal acquisition module includes IN1, IN2 and IN3, and the IN1, IN2 and IN3 are Three active signal input ports and three passive signal input ports, and the two signals of the same number are connected with NMOS tubes, and the NMOS tubes are connected with solid state relays with double normally open contacts, and the voting module includes Two three-contact mechanical relays, the three-contact mechanical relays are all provided with NMOS tubes, and the six contacts of the three double-normally open solid-state relays are two-phase and two-phase and form three out of two logic , the two phases of the solid state relay are connected to the NMOS tube on the three-contact mechanical relay, the signal expansion output module includes a mechanical relay with two n...

Embodiment 3

[0037] like Figures 1 to 8 As shown, the control module using two-out-of-three logic voting includes a signal acquisition module, a voting module and a signal expansion output module, and is characterized in that: the signal acquisition module includes IN1, IN2 and IN3, and the IN1, IN2 and IN3 are Three active signal input ports and three passive signal input ports, and the two signals of the same number are connected with NMOS tubes, and the NMOS tubes are connected with solid state relays with double normally open contacts, and the voting module includes Two three-contact mechanical relays, the three-contact mechanical relays are all provided with NMOS tubes, and the six contacts of the three double-normally open solid-state relays are two-phase and two-phase and form three out of two logic , the two phases of the solid state relay are connected to the NMOS tube on the three-contact mechanical relay, the signal expansion output module includes a mechanical relay with two n...

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Abstract

The invention discloses a control module adopting three-sampling-two-logic voting. The control module comprises a signal acquisition module, a voting module and a signal extension output module, wherein the signal acquisition module comprises IN1, IN2 and IN3, the IN1, the IN2 and the IN3 are three active signal input ports and three passive signal input ports, the two signals of the same serial number are connected with NMOS tubes, and the NMOS tubes are connected with a solid-state relay with a double-normally-open contact; the voting module comprises two mechanical relays with three contacts, and NMOS tubes are arranged on mechanical relays of the three contacts, and the two phases of the six contacts of the three solid-state relays are connected with each other to form a three-taking-two logic; and the signal expansion output module comprises a mechanical relay with two normally-open contacts. A plurality of problems of an I/O signal relay of a control protection system adopting the three-sampling-two-logic voting mode can be effectively solved, the cost of the system equipment can be saved, the installation, operation and maintenance is simple and convenient, and the workloadof line arranging and line checking is reduced.

Description

technical field [0001] The invention belongs to the field of steam turbine protection and control systems, in particular to a control module using two out of three logic voting. Background technique [0002] The steam turbine control and protection system refers to various protection and control systems to ensure the normal operation of the steam turbine. Including the steam turbine trip protection system (ETS), the control and protection part of the steam turbine digital electro-hydraulic control system (DEH), and overspeed protection and other systems. [0003] In the control and protection system, such as the steam turbine DEH control system circuit, if there are important I / O signals related to the two-out-of-three voting output, almost all of them adopt the relay voting method. The principle is to use 3 to 4 relays, and each relay has at least 2 More than one group of contacts form a 3 out of 2 voting circuit through wiring. This method can achieve two-out-of-three vo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01D21/00
CPCF01D21/00
Inventor 游滔陈林张耀彭敏何阳森孙韬周海
Owner DONGFANG ELECTRIC AUTOMATIC CONTROL ENG CO LTD
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