CN102064606A - PLC (Programmable Logic Controller) controlled direct-current power supply - Google Patents
PLC (Programmable Logic Controller) controlled direct-current power supply Download PDFInfo
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- CN102064606A CN102064606A CN2010105664778A CN201010566477A CN102064606A CN 102064606 A CN102064606 A CN 102064606A CN 2010105664778 A CN2010105664778 A CN 2010105664778A CN 201010566477 A CN201010566477 A CN 201010566477A CN 102064606 A CN102064606 A CN 102064606A
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Abstract
The invention relates to a PLC (Programmable Logic Controller) controlled direct-current power supply, which is characterized in that a control circuit comprises alternating current, voltage and a current sampling system, wherein the alternating current and the voltage are controlled by a PLC. A control power supply is connected with a peripheral circuit. The sampling of the voltage and the current is realized by a magnetic balanced type Hall element; and the peripheral circuit is used for coordinating and perfecting various operations of the direct-current power supply under the control of a control loop and mainly has functions of insulation monitoring and control of a flash system, a relay control system and a sound alarm system. The PLC controlled direct-current power supply has the advantages of small size, powerful functions, flexibility, universality and stronger adaptability to severe environments, therefore, the direct-current power supply can be widely applied to the fields of metallurgy, chemical industry, traffic, power and the like and become an upgraded substitute product for the controlled direct-current power supply of modern industry.
Description
Technical field
The present invention relates to a kind of DC power supply, particularly a kind of PLC control DC power supply.
Background technology
For the power plant, transformer station, dc power supply safely and reliably, be to guarantee that electric power normally moves the necessary condition of production and safe operation, along with Automation of Electric Systems, computer-controlled development, the raising of on-the-spot operation and maintenance requirement, original system can not satisfy present requirement.
Summary of the invention
The objective of the invention is the deficiency that exists in the above-mentioned technology, a kind of PLC control DC power supply is provided.
The object of the present invention is achieved like this: be made up of control circuit and peripheral circuit.It is characterized in that control circuit is by the interchange and the voltage of PLC control, the current sample system constitutes.And voltage, current sample is then realized by the magnetic balance type Hall element; Peripheral circuit is every work of coordinating and improve DC power supply under the control of control loop, mainly comprises the insulating monitoring function, flash system, relay control system, audible alarm system control etc.And the control power supply links to each other with peripheral circuit.
Advantage of the present invention is to combine computer technology, a kind of general-purpose industrial automatic control equipment that automatic revertive control technology and mechanics of communication grow up.It has, and volume is little, and function is strong, and is agile and all-purpose in the ability of stronger suitable bad environment, thereby at metallurgy, chemical industry, and traffic, fields such as electric power obtain to use widely, become the product of update of the DC power supply of modern industry control.
Description of drawings:
Fig. 1 is a circuit structure schematic diagram of the present invention
Embodiment:
Below in conjunction with accompanying drawing present embodiment is described further
As shown in Figure 1, AC power is through transformer TM step-down, isolate, input control loop front end, enter among the silicon controlled rectifier SCR through the empty AC power contactor of opening Q and PLC control, before entering sampling circuit, because a large amount of interchange radio-frequency components is contained in the loop after the rectification, if not treatedly directly enter sampling, can inform sampled value instability very, and finally can't realize controlled function, before sampling circuit, install the filter circuit of LC like this additional, before entering load, cause counter the sending of direct current 220V power supply after avoiding exchanging dead electricity, the control that makes the mistake is provided with a check diode at the front end of load, wherein adopted the present comparatively supply power mode of advanced two dc buss, promptly control bus, closing bus bar separately carries out pressure regulation by the silicon chain to the control bus, avoid the worry of manual adjustment control busbar voltage under the single busbar connection in the past, improved reliability of system operation simultaneously.
Control power supply take from storage battery, by two high frequency switch powers (SPS1 and SPS2) provide respectively 24VDC and ± 15VDC.SPS2 (24VDC) is used for relay control and gives PLC, man-machine interface, and alarming horn and temperature sensor etc. provides working power, SPS2(± 15VDC) working power is provided for the Hall element that is used to sample.
High frequency switch power (SPS1, SPS2) operation principle is that the direct voltage that will come from storage battery is transformed into high-frequency ac voltage by high-frequency converter, be transformed into the high-frequency ac voltage that needs through high frequency transformer again, after output rectifier and filter, the high-frequency ac voltage rectifying and wave-filtering of converter output is obtained high-quality, high-quality direct voltage.
Voltage, the sampling of electric current all is to realize by Hall element, because the output of Hall element all is magnitudes of current, and the input of PLC can only be accepted magnitude of voltage, therefore pass through resistance at the output M of Hall element end, the filter that electric capacity is formed changes the magnitude of current into voltage, and then is input to PLC and handles.It is based on microprocessor that DC power supply adopts programmable PLC, combines computer technology, a kind of general-purpose industrial automatic control equipment that automatic revertive control technology and mechanics of communication grow up.It has, and volume is little, and function is strong, and is agile and all-purpose in the ability of stronger suitable bad environment, thereby at metallurgy, chemical industry, and traffic, fields such as electric power obtain to use widely, become the product of update of the DC power supply of modern industry control.
Claims (1)
1. a PLC control DC power supply is made up of control circuit and peripheral circuit, it is characterized in that control circuit is by the interchange and the voltage of PLC control, and the current sample system constitutes, and voltage, current sample are then realized by the magnetic balance type Hall element; Peripheral circuit is every work of coordinating and improve DC power supply under the control of control loop, mainly comprises the insulating monitoring function, flash system, and relay control system, audible alarm system control etc., and the control power supply links to each other with peripheral circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105664778A CN102064606A (en) | 2010-12-01 | 2010-12-01 | PLC (Programmable Logic Controller) controlled direct-current power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105664778A CN102064606A (en) | 2010-12-01 | 2010-12-01 | PLC (Programmable Logic Controller) controlled direct-current power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102064606A true CN102064606A (en) | 2011-05-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105664778A Pending CN102064606A (en) | 2010-12-01 | 2010-12-01 | PLC (Programmable Logic Controller) controlled direct-current power supply |
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| Country | Link |
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| CN (1) | CN102064606A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107345978A (en) * | 2017-06-23 | 2017-11-14 | 沈阳工程学院 | The packaged type of power plant or intelligent substation controls power supply and control method |
-
2010
- 2010-12-01 CN CN2010105664778A patent/CN102064606A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107345978A (en) * | 2017-06-23 | 2017-11-14 | 沈阳工程学院 | The packaged type of power plant or intelligent substation controls power supply and control method |
| CN107345978B (en) * | 2017-06-23 | 2023-07-04 | 沈阳工程学院 | Movable control power supply for power plant or intelligent substation and control method |
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| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110518 |