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Digital electrohydraulic controller direct-current power supply switching system

A DC power supply, digital electro-hydraulic technology, applied in the direction of emergency power supply arrangements, electrical components, circuit devices, etc., can solve the problems of unfavorable installation and engineering use, low switching voltage level, small current capacity, etc., so as to facilitate engineering use, The effect of simple wiring and low manufacturing cost

Pending Publication Date: 2019-07-16
DONGFANG ELECTRIC AUTOMATIC CONTROL ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The design of the DC power supply circuit generally adopts DC diode switching, high-voltage blocking group power supply, etc. There are also some other DC switching devices on the market, either the switching voltage level is low, and the current carrying capacity is small enough to meet the needs of DEH\MEH devices, or It is large in size and very expensive, which is not conducive to installation and engineering use

Method used

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  • Digital electrohydraulic controller direct-current power supply switching system
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  • Digital electrohydraulic controller direct-current power supply switching system

Examples

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Effect test

Embodiment 1

[0037] like Figures 1 to 8 As shown, the digital electro-hydraulic controller DC power switching system includes a switching logic circuit board, a switching output power supply module and a power failure alarm module, the switching logic circuit board includes a main power supply 1 and an auxiliary power supply 2, and the main power supply 1 is Relays DCR1, DCR2, K5 and K7 are connected, and relays DCR3, K6 and K8 are connected to the auxiliary power supply;

[0038] The switching output power supply module includes a first output power supply 3, a second output power supply 4, a third output power supply 5, a fourth output power supply 6 and a fifth output power supply 7;

[0039] The power failure alarm module includes relays K1, K2, K3 and K4;

[0040] The first output power supply 3 is connected to relays K5 and K7, the second output power supply 4 is connected to relay DCR1, the third output power supply 5 is connected to relay DCR2, and the fourth output power supply ...

Embodiment 2

[0053] like Figures 1 to 8 As shown, the digital electro-hydraulic controller DC power switching system includes a switching logic circuit board, a switching output power supply module and a power failure alarm module, the switching logic circuit board includes a main power supply 1 and an auxiliary power supply 2, and the main power supply 1 is Relays DCR1, DCR2, K5 and K7 are connected, and relays DCR3, K6 and K8 are connected to the auxiliary power supply;

[0054] The switching output power supply module includes a first output power supply 3, a second output power supply 4, a third output power supply 5, a fourth output power supply 6 and a fifth output power supply 7;

[0055] The power failure alarm module includes relays K1, K2, K3 and K4;

[0056] The first output power supply 3 is connected to relays K5 and K7, the second output power supply 4 is connected to relay DCR1, the third output power supply 5 is connected to relay DCR2, and the fourth output power supply ...

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Abstract

The invention discloses a digital electrohydraulic controller direct-current power supply switching system. The system comprises a switching logic circuit board, a switching output power supply moduleand a power-off alarm module, wherein the switching logic circuit board comprises a main power supply and an auxiliary power supply; the main power supply is connected with relays DCR1, DCR2, K5 andK7; the auxiliary power supply is connected with relays DCR3, K6 and K8; the switching output power supply module comprises a first output power supply, a second output power supply, a third output power supply, a fourth output power supply and a fifth output power supply; the first output power supply is connected with K5 and K7; the second output power supply is connected with DCR1; the third output power supply is connected with DCR2; the fourth output power supply is connected with K5 and K7; and the fifth output power supply is connected with DCR2. Power supply control is provided for thefive output power supplies through the main power supply and the auxiliary power supply, so that various disadvantages existing in an original switching device are eliminated effectively.

Description

technical field [0001] The invention belongs to the technical field of steam turbine control systems, in particular to a digital electro-hydraulic controller DC power switching system. Background technique [0002] DEH is Digital Electric Hydraulic Control System of steam turbine, MEH (Micro Electro-Hydraulic Control System) is small steam turbine electro-hydraulic control system, digital ESC for short, is an important part of DCS, its main function is the speed of steam turbine Conventional controls such as control, automatic synchronous control, load control, etc., also have many auxiliary functions such as various steam turbine function tests, valve tests and overspeed tests, and can realize data sharing with the DCS system. [0003] The more important part of the digital ESC is the design of the solenoid valve control and protection circuit, and the DC power supply of the solenoid valve is the configuration of almost every project. The design of the power circuit is rela...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J9/06H05K5/02H05K5/04H05K5/06
CPCH02J9/06H05K5/0217H05K5/04H05K5/06H05K5/069H02J9/068Y02B70/30Y04S20/20
Inventor 张耀游滔曾光明
Owner DONGFANG ELECTRIC AUTOMATIC CONTROL ENG CO LTD
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