CN209072152U - A kind of power supply system for PLC control cabinet - Google Patents
A kind of power supply system for PLC control cabinet Download PDFInfo
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- CN209072152U CN209072152U CN201822217715.9U CN201822217715U CN209072152U CN 209072152 U CN209072152 U CN 209072152U CN 201822217715 U CN201822217715 U CN 201822217715U CN 209072152 U CN209072152 U CN 209072152U
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- power
- ups
- relay
- power supply
- load
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Abstract
The utility model discloses a kind of power supply system for PLC control cabinet, including ups power, relay, the input terminal of alternating current and ups power is connected, and the output end of the ups power and load connect；The normally opened contact K1 of the relay is arranged between the output end of ups power and load, and the alternating current is connected by the normally-closed contact K2 and load of relay；The coil of the relay is used for according to power on/off whether the failure of ups power.Utility model has the advantages that being controlled by the normally-open normally-close contact that relay is arranged when UPS failure, it is in time load supplying by alternating current, reduces power-off risk.
Description
Technical field
The utility model relates to power supply technique, in particular to a kind of power supply system for PLC control cabinet.
Background technique
PLC control cabinet is extremely important in Industry Control, therefore to guarantee its power supply as far as possible, and common scheme is will
Alternating current is powered after passing through ups power for PLC control cabinet.UPS is called uninterruptible power supply, is widely used in UPS
(Uninterruptible Power System/Uninterruptible Power Supply), i.e. uninterruptible power supply, be by
Battery (mostly plumbic acid maintenance-free battery) is connected with host, is converted direct current by modular circuits such as host inverters
At the system equipment of alternating current.It is mainly used for single computer, computer network system or other power electronic equipments such as electromagnetism
The offers such as valve, pressure transmitter stabilization, continual power supply.When alternating current input is normal, UPS will be supplied after alternating current pressure stabilizing
It is used to load, UPS at this time is exactly an AC system electricity voltage-stablizer, while it also charges to self-contained battery；Work as commercial power interruption
When (forced outage), UPS by the direct current energy of battery, continues to supply by the square normal load of inverter switching conversion immediately
220V alternating current makes load maintain to work normally and protects load soft and hardware not damaged.UPS equipment is usually to overtension
Or brownout can provide protection.
Ups power is then directly switched to by the inside power module by inlet wire mains-supplied under normal circumstances
AC220/DC220V is powered communication apparatus.If normally out-put supply cannot cause to load still when UPS failure
The failure of power-off influences the normal work of load.The purpose that UPS is arranged so does not reach pressure stabilizing not only, does not power off power supply, also
It may cause load that can not power due to its failure.
Summary of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of power supply systems for PLC control cabinet, lead to
The normally-open normally-close contact access circuit of relay is crossed, so that being switched to alternating current in time when ups power failure and supplying for load
Electricity.
To achieve the goals above, the technical solution adopted by the present invention are as follows: a kind of power supply system for PLC control cabinet,
Including ups power, relay, the input terminal of alternating current and ups power is connected, and the output end of the ups power and load connect；Institute
The normally opened contact K1 for stating relay is arranged between the output end of ups power and load, and the alternating current is normally closed by relay
Contact K2 and load connect；The coil of the relay is used for according to movement/involution whether the failure of ups power.
The power supply system includes single-chip microcontroller, ups power fault detection unit, and the ups power fault detection unit is used
Whether detecting the failure of ups power, it is connect with the input terminal of single-chip microcontroller, the output end of the single-chip microcontroller and the line of relay
Circle connection, for driving the power on/off of relay coil.
The output end of the single-chip microcontroller and the input terminal of buzzer connect.
The ups power fault detection unit is current transformer or voltage transformer.
The ups power includes battery and battery management system, the input terminal and battery management system of the single-chip microcontroller
Output end connection.
Utility model has the advantages that controlled by the normally-open normally-close contact that relay is arranged when UPS failure, and
When by alternating current be lower layer's load-side power, reduce power-off risk；It can be realized using an intermediate relay combination ups power:
It will be load supplying after alternating current pressure stabilizing by ups power when ups power is normal；When ups power failure, it is switched to city in time
Electricity is load supplying, although the defects of directly might have voltage instability with mains-supplied, in case of emergency than power-off
It is more practical, the safe operation of load is protected, can effectively be stopped loss；Relay, come drive control, passes through inspection by single-chip microcontroller
Survey the output voltage of ups power, electric current judge its whether failure, and then whether control the coil on-off of relay.
Detailed description of the invention
Below to each width attached drawing of description of the invention expression content and figure in label be briefly described:
Fig. 1 is the utility model power supply system structure principle chart.
Specific embodiment
A specific embodiment of the invention is made further detailed below against attached drawing by the description to optimum embodiment
Thin explanation.
As shown in Figure 1, a kind of power supply system for PLC control cabinet, including ups power, relay, alternating current and UPS are electric
The input terminal in source connects, and the output end of ups power and load connect；The defeated of ups power is arranged in the normally opened contact K1 of relay
Between outlet and load, alternating current is connected by the normally-closed contact K2 and load of relay；The coil of relay is used for according to UPS electricity
The power on/off whether failure in source.One of embodiment is to connect the output end of the coil of relay and ups power, this
Sample is powered always as long as having output relay coil.As long as ups power works normally in this way, normally-closed contact be will disconnect, often
Opening contact will be closed, and such alternating current will be always load PLC control cabinet power supply by ups power；When ups power failure without
Method export when, relay coil power-off, in this way due to the closure of normally-closed contact so that alternating current be directly PLC control cabinet power supply, this
Sample can under UPS fault condition also can powering load, some in emergency circumstances more practical, than directly powering off to load
It influences smaller.
Under normal circumstances alternating current by UPS by alternating current be converted into out-put supply give load-side power, out-put supply obtain it is electric it
Relay coil obtains electric afterwards, and normally opened to become normally closed, load-side obtains electric；When UPS failure, power supply output, relay is not detected
Device is failure to actuate, and alternating current is sent from the normally closed point of the relay to load-side.The stability of ups power is improved from another way,
Reliability.
It includes two kinds of situations:
1) normal UPS output mode
Alternating current enters UPS, and UPS out-put supply is through UPS to load-side, the actuating of relay, normally opened contact K1 closure, alternating current
Load supplying.
2) UPS fault mode
Alternating current enters UPS, out-put supply failure, and relay is failure to actuate, and alternating current is directly by the normally closed point of relay to load-side
Power supply.It can be seen that the technical program is under the premise of guaranteeing power supply, price economy material benefit, it is only necessary to which an intermediate relay is
It can be achieved, provide stability for power supply.In case of emergency there are suitable practical advantages.
Power supply system includes single-chip microcontroller, ups power fault detection unit, and ups power fault detection unit is for detecting UPS
It whether the failure of power supply, is connect with the input terminal of single-chip microcontroller, the output end of single-chip microcontroller and the coil of relay connect, for driving
The power on/off of motor type relay coil.Ups power fault detection unit is realized using current transformer, voltage transformer, passes through inspection
Voltage, the current signal of the output end of ups power are surveyed to judge whether ups power normally exports, if voltage and current declaration of exception
Output, when ups power is normal at this time, MCU driving relay coil is powered, and normally opened contact closure normally-closed contact disconnects at this time,
Ups power is load supplying, voltage current transformer acquire related data judge ups power whether failure, when ups power therefore
After barrier, single-chip microcontroller judges after obtaining result according to voltage, electric current, and single-chip microcontroller does not issue drive control, relay coil power-off, city
Electricity is directly load supplying by normally-closed contact, so as to provide switching in ups power failure, alternating current is provided
Certain time power supply.
The output end of single-chip microcontroller and the input terminal of buzzer connect.In order to provide alarm in ups power failure, bee is set
Ring device, and when single-chip microcontroller judges voltage and current failure, control driving buzzer issues alarm and provides warning, in this way in UPS electricity
It being capable of the failure powered by utility power by reminding monitoring personnel ups power when the failure of source.Due to the battery in ups power
There is the requirement such as service life, battery management system chip is set in its battery, for obtaining the relevant parameter of battery
SOC, SOH, output end are connect with single-chip microcontroller, and for upload information to single-chip microcontroller, single-chip microcontroller is connect with display, can be shown
Related data.Conveniently check.
Obviously present invention specific implementation is not subject to the restrictions described above, as long as using method concept and skill of the invention
The improvement for the various unsubstantialities that art scheme carries out, it is within the scope of the present invention.
Claims (5)
1. a kind of power supply system for PLC control cabinet, it is characterised in that: including ups power, relay, alternating current and ups power
Input terminal connection, the output end of the ups power and load connect；The normally opened contact K1 setting of the relay is in UPS electricity
Between the output end and load in source, the alternating current is connected by the normally-closed contact K2 and load of relay；The line of the relay
It encloses for according to power on/off whether the failure of ups power.
2. a kind of power supply system for PLC control cabinet as described in claim 1, it is characterised in that: the power supply system packet
Include single-chip microcontroller, ups power fault detection unit, the ups power fault detection unit be used to detect the failure of ups power with
It is no, it is connect with the input terminal of single-chip microcontroller, the output end of the single-chip microcontroller and the coil of relay connect, for driving relay
The power on/off of coil.
3. a kind of power supply system for PLC control cabinet as claimed in claim 2, it is characterised in that: the single-chip microcontroller it is defeated
The connection of the input terminal of outlet and buzzer.
4. a kind of power supply system for PLC control cabinet as claimed in claim 2 or claim 3, it is characterised in that: the ups power
Fault detection unit is current transformer or voltage transformer.
5. a kind of power supply system for PLC control cabinet as claimed in claim 2 or claim 3, it is characterised in that: the ups power
Including battery and battery management system, the input terminal of the single-chip microcontroller and the output end of battery management system are connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822217715.9U CN209072152U (en) | 2018-12-27 | 2018-12-27 | A kind of power supply system for PLC control cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822217715.9U CN209072152U (en) | 2018-12-27 | 2018-12-27 | A kind of power supply system for PLC control cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209072152U true CN209072152U (en) | 2019-07-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822217715.9U Active CN209072152U (en) | 2018-12-27 | 2018-12-27 | A kind of power supply system for PLC control cabinet |
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| Country | Link |
|---|---|
| CN (1) | CN209072152U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111538273A (en) * | 2020-05-18 | 2020-08-14 | 淮安信息职业技术学院 | Solar wireless intelligent networking control platform |
-
2018
- 2018-12-27 CN CN201822217715.9U patent/CN209072152U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111538273A (en) * | 2020-05-18 | 2020-08-14 | 淮安信息职业技术学院 | Solar wireless intelligent networking control platform |
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