CN210244186U - Novel intelligent power supply time sequence control circuit - Google Patents
Novel intelligent power supply time sequence control circuit Download PDFInfo
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- CN210244186U CN210244186U CN201921141167.4U CN201921141167U CN210244186U CN 210244186 U CN210244186 U CN 210244186U CN 201921141167 U CN201921141167 U CN 201921141167U CN 210244186 U CN210244186 U CN 210244186U
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- power supply
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Abstract
The utility model provides a novel intelligent power supply sequential control circuit, through the detection and the feedback to the voltage and the electric current of relay coil place circuit, the main control unit judges the break-make condition that corresponds supply circuit to acquire each supply circuit's behavior in real time, can realize a plurality of supply circuit's accurate control. The utility model discloses a set up voltage feedback circuit, through voltage feedback circuit's detection, feed back the voltage status of each power supply circuit output port to the master control unit, reach the closed loop and detect and control output voltage's purpose. Meanwhile, each path of power supply circuit is subjected to leakage current detection, and the power-on condition of each external device can be mastered in real time, so that a reasonable control strategy is formulated. And the problem of potential safety hazard to subsequent equipment due to input phase sequence error caused by non-standard wiring is solved by arranging the phase sequence identification adjusting circuit.
Description
Technical Field
The utility model relates to a circuit control field, concretely relates to novel intelligent power supply sequential control circuit.
Background
With the continuous increase of the practical requirements, the control on the power timing becomes more and more, especially for the power timing control under the condition of multi-output. For example, in the CCTV (closed circuit television) power timing control process, it is necessary to reasonably control the on and off of the power supply of multiple cameras, so as to provide a program-controlled setting logic or remote control to supply power to a load, and if the control of multiple power supply circuits is deviated, the output signals may be disordered, and even broadcasting accidents may be caused.
The existing CCTV power supply time schedule controller generally controls the on-off of each power supply circuit through a relay, but mostly does not detect the working states of a coil and a contact of the relay, and for an application occasion with higher control requirement, when the relay and a related driving circuit break down, the current working state of equipment cannot be known in time, and potential safety hazards are easily formed.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to prior art's not enough to a novel intelligent power supply sequential control circuit is provided, concrete scheme is as follows:
a novel intelligent power supply time sequence control circuit comprises a main control unit, wherein the main control unit is connected with a relay drive circuit for controlling the on-off of each output branch of the novel intelligent power supply time sequence control circuit and a state feedback circuit of the relay drive circuit;
the relay driving circuit comprises a relay coil and a relay contact switch correspondingly arranged on the output branch, one side of the relay coil is connected with a power supply, the other side of the relay coil is grounded through an electronic switch and a resistor in sequence, and the main control unit is connected with the electronic switch in a control mode;
the state feedback circuit comprises a voltage comparator and an operational amplifier, wherein the output side of the voltage comparator is connected with the main control unit, and the input side of the voltage comparator is connected with the connection point of the relay coil and the electronic switch; the input side of the operational amplifier is connected with the connection point of the electronic switch and the resistor, and the output side of the operational amplifier is connected with the main control unit.
Furthermore, a voltage feedback circuit is arranged between the main control unit and the output circuit.
Furthermore, the main control unit is further connected with a leakage current detection unit, and the leakage current detection unit comprises a leakage current transformer arranged on the output branch.
Furthermore, the main control unit is also connected with a phase sequence identification and adjustment circuit for identifying and adjusting the phase sequence of the input power supply.
Furthermore, the main control unit is also connected with a communication unit.
Furthermore, the main control unit is also connected with a display device.
Furthermore, the main control unit is also connected with an alarm device.
The utility model discloses relative prior art has outstanding substantive characteristics and the progress that is showing, specifically speaking, the utility model has the following advantages:
1. the utility model collects the voltage between the relay coil and the electronic switch, and compares the voltage with a set reference voltage by using the voltage comparator, thereby judging whether the relay coil acts or not, and the logical level output by the voltage comparator is used as a relay voltage feedback signal to the main control unit; meanwhile, after the electronic switch is closed, the relay coil is electrified, current flows through the resistor, the resistor changes the current into voltage, and the relay current feedback signal output by the operational amplifier is sent to the main control unit through the amplification effect of the operational amplifier to be used for detecting the working current of the relay coil. Through the feedback of voltage and current, the main control unit judges the on-off condition of the corresponding power supply circuit, thereby acquiring the working condition of each power supply circuit in real time and realizing the accurate control of a plurality of power supply circuits.
2. The utility model discloses a set up voltage feedback circuit, through voltage feedback circuit's detection, feed back the voltage status of each power supply circuit output port to the master control unit, reach the closed loop and detect and control output voltage's purpose. Meanwhile, each path of power supply circuit is subjected to leakage current detection, and the power-on condition of each external device can be mastered in real time, so that a reasonable control strategy is formulated. And the problem of potential safety hazard to subsequent equipment due to input line sequence error caused by non-standard wiring is solved by arranging the phase sequence identification and adjustment circuit.
Drawings
Fig. 1 is a block diagram of the structure in the embodiment of the present invention;
fig. 2 is a schematic diagram of a circuit structure in an embodiment of the present invention;
fig. 3 is a schematic diagram of a state feedback circuit of a relay in an embodiment of the present invention.
Detailed Description
The technical solution of the present invention will be described in further detail through the following embodiments.
System architecture
As shown in fig. 1, the present embodiment includes a main control unit, and the main control unit is connected to a phase sequence identification adjusting circuit, a relay driving circuit, a state feedback circuit, a load voltage isolation feedback circuit, a leakage current detection unit, a limited communication interface circuit, a power management circuit, a serial display, and an audio-optical indicating circuit. The phase sequence identification adjusting circuit is arranged on the input side of the main power supply, and the main power supply input circuit is also provided with a power control circuit; the load voltage isolation feedback circuit and the leakage current detection unit are both connected with the power output port.
The main control unit: the main control unit uses a microcontroller singlechip to realize the integral function control of the power supply time sequence controller.
Wired communication interface circuit: the main control unit and the wired communication interface circuit realize bidirectional data communication, and the wired communication interface comprises a USB interface, an RS232 interface, an RS485 interface, a network port and the like. The wired communication interface circuit exchanges data with the communication server in a bidirectional way, the data are uploaded to the data processing center through the communication server to be subjected to data aggregation and processing, the real-time monitoring and the control of the working state of the equipment of the power time sequence controller are realized in the data processing center (EHM health state monitoring unit), and the monitoring of the EHM monitoring state of the power time sequence controller can be realized through the aggregation and analysis of various historical data of the power time sequence controller.
The power management circuit: the power supply management circuit realizes the acquisition and control of voltage and current data of the working power supply of each part of the system of the power supply time sequence controller. The main control unit monitors the working states of the working power supplies.
A serial port display screen: the main control unit and the serial port display screen perform bidirectional data interaction, and information such as working voltage, working state of each path and the like of the equipment is displayed on the screen.
The acousto-optic indicating circuit: in the embodiment, the alarm device selects the acousto-optic indicating circuit, the main control unit controls the acousto-optic indicating circuit to work, the LED which controls the acousto-optic indicating circuit indicates the working state of the power supply time sequence controller, and the buzzer is used for internal fault alarm and information reminding.
The input of a main power supply: and an external single-phase AC220V power supply is used as an external interface input of the whole equipment.
Phase sequence discernment adjusting circuit: the phase sequence of the live wire and the zero wire of the single-phase AC220V input power supply is identified, the circuit is communicated with the main control unit, the relay in the circuit is switched to realize the switching of the phase sequence, and the phase sequence of the post-stage circuit is ensured to be correct.
A power control circuit: and the relay contact is adopted inside to carry out on-off control on the live wire, so that the power switching of each output is realized.
A relay drive circuit: the main control unit sends control signals of all paths to control the relay drive circuit, and after the coil of the relay drive circuit acts, the corresponding relay contact acts.
A state feedback circuit: the state feedback circuit realizes the detection and identification of the relay coil voltage and current in the relay drive circuit, and feeds back the action condition of the relay coil through the detection and identification of each parameter so as to realize the identification of the working state of the relay; and then judging whether a contact switch of the relay acts according to the working state of the relay, if so, switching on an output branch where the contact switch is located, otherwise, indicating that the output branch is not switched on, and determining the switching-on condition of the output branch through the judgment so as to facilitate subsequent maintenance and overhaul.
Power output port: and outputting each path of power supply to the external equipment through the output interface.
Load voltage isolation feedback circuit: the isolated voltage acquisition of each power supply is realized, the identification of the state of each power supply is realized, and the isolated voltage is fed back to the main control unit.
A leakage current detection unit: the leakage current detection unit is responsible for detecting leakage current of the live wire and the zero line of each path of output port and is communicated with the main control unit. When the leakage current of a certain path exceeds the internal set value, the operation processing of the main control unit is carried out to execute the acousto-optic indication, and even the power switch of the path is cut off.
Circuit structure
Fig. 2 is a schematic circuit diagram of the present embodiment, where L is the live line of the AC220V power supply total input, and N is the neutral line of the AC220V power supply total input. In this embodiment, 8 output channels, i.e. 8 output branches, are included, L1 is the live line of the AC220V power output channel 1, and N1 is the neutral line of the AC220V power output channel 1. L2 is the hot line of AC220V power output channel 1 and N2 is the neutral line of AC220V power output channel 2. By analogy, L8 is the hot line of the AC220V power output channel 8, and N8 is the neutral line of the AC220V power output channel 8.
After the main power supply is input, the main power supply is adjusted to a set phase sequence after passing through a change-over switch controlled by a phase sequence identification adjusting circuit. The whole design has 8 load output ports, all adopts the relay to carry out on-off control on the live wire of every way. The output part of each path adopts a leakage current transformer to carry out leakage current detection, so that the zero sequence current is prevented from being tripped excessively due to the leakage current of a certain path relative to the ground.
K1 is a relay-controlled contact switch of the first path for switching on and off the load, and K2 and K8 respectively represent a relay-controlled contact switch of the second path and the eighth path.
The CTZ1 is a leakage current transformer and is used for detecting the leakage current of the live wire and the zero wire, and the CTZ2 and the CTZ8 respectively represent a second path leakage current transformer and an eighth path leakage current transformer.
Principle of operation
The phase sequence identification and adjustment circuit detects the phase sequence state of the main power supply input and sends the state information to the main control unit, and the main control unit carries out corresponding control and adjustment according to the state information. The relay in the phase sequence identification and adjustment circuit is driven to switch the switch state, so that the phase sequence in the device is ensured to be correct, and the phase sequence output by each path is ensured to be correct.
Taking the first path control as an example: when the first path is controlled, the main control unit sends a control signal to the relay driving circuit, and after the relay coil acts, the corresponding relay switch K1 acts. And meanwhile, the state feedback circuit feeds back the voltage and current states of the relay coil to the main control unit as feedback, so that closed-loop detection is formed, and whether the relay acts or not is detected. And the leakage current detection unit detects the value of the leakage current transformer CTZ1 to realize the detection of the leakage current of the circuit. When the first path is controlled, the voltage state of the output port is fed back to the main control unit through the detection of the load voltage isolation feedback circuit, and the main control unit judges the on-off condition of the corresponding power supply circuit through the feedback of the voltage, so that the working condition of each power supply circuit is obtained in real time, the monitoring control of a plurality of power supply circuits can be realized, and the purpose of detecting the output voltage of the path in a closed loop manner is achieved. And 2-8 channels, and so on.
As shown in fig. 3, which is a schematic circuit diagram of a state feedback circuit of the relay in this embodiment, the voltage between the relay coil and the electronic switch is collected, and the voltage is compared with a set reference voltage by using a voltage comparator, so as to determine whether the relay coil is operated, and the logical level output by the voltage comparator is used as a relay voltage feedback signal to the main control unit.
The relay driving signal from the main control unit drives an electronic switch, which can be a triode, a MOS (metal oxide semiconductor) tube, a driving chip and the like, and the electronic switch is used as a controlled switch for controlling the power-on and power-off of the relay coil.
The sampling resistor is used for detecting the working current of the relay coil, when the electronic switch is closed, the relay coil is electrified, and the current flows through the sampling resistor. The sampling resistor converts the current into voltage, and the relay current feedback signal output by the operational amplifier is sent to the main control unit through the amplification effect of the operational amplifier to be used for detecting the working current of the relay coil.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, it should be understood by those skilled in the art that: the invention can be modified or equivalent substituted for some technical features; without departing from the spirit of the present invention, it should be understood that the scope of the claims is intended to cover all such modifications and variations.
Claims (7)
1. The utility model provides a novel intelligence power supply sequential control circuit which characterized in that: the novel intelligent power supply time sequence control circuit comprises a main control unit, wherein the main control unit is connected with a relay driving circuit for controlling the on-off of each output branch of the novel intelligent power supply time sequence control circuit and a state feedback circuit of the relay driving circuit;
the relay driving circuit comprises a relay coil and a relay contact switch correspondingly arranged on the output branch, one side of the relay coil is connected with a power supply, the other side of the relay coil is grounded through an electronic switch and a resistor in sequence, and the main control unit is connected with the electronic switch in a control mode;
the state feedback circuit comprises a voltage comparator and an operational amplifier, wherein the output side of the voltage comparator is connected with the main control unit, and the input side of the voltage comparator is connected with the connection point of the relay coil and the electronic switch; the input side of the operational amplifier is connected with the connection point of the electronic switch and the resistor, and the output side of the operational amplifier is connected with the main control unit.
2. The novel intelligent power timing control circuit of claim 1, wherein: and a voltage feedback circuit is arranged between the main control unit and the output circuit.
3. The novel intelligent power timing control circuit of claim 1 or 2, wherein: the main control unit is further connected with a leakage current detection unit which comprises a leakage current transformer arranged on the output branch.
4. The novel intelligent power timing control circuit of claim 3, wherein: the main control unit is also connected with a phase sequence identification and adjustment circuit for identifying and adjusting the phase sequence of the input power supply.
5. The novel intelligent power timing control circuit of claim 1, wherein: the main control unit is also connected with a communication unit.
6. The novel intelligent power timing control circuit of claim 1, wherein: the main control unit is also connected with a display device.
7. The novel intelligent power timing control circuit of claim 1, wherein: the main control unit is also connected with an alarm device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921141167.4U CN210244186U (en) | 2019-07-19 | 2019-07-19 | Novel intelligent power supply time sequence control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921141167.4U CN210244186U (en) | 2019-07-19 | 2019-07-19 | Novel intelligent power supply time sequence control circuit |
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| Publication Number | Publication Date |
|---|---|
| CN210244186U true CN210244186U (en) | 2020-04-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921141167.4U Expired - Fee Related CN210244186U (en) | 2019-07-19 | 2019-07-19 | Novel intelligent power supply time sequence control circuit |
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| CN (1) | CN210244186U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114371755A (en) * | 2021-12-21 | 2022-04-19 | 浪潮金融信息技术有限公司 | Intelligent multi-path power supply control method, system and medium |
-
2019
- 2019-07-19 CN CN201921141167.4U patent/CN210244186U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114371755A (en) * | 2021-12-21 | 2022-04-19 | 浪潮金融信息技术有限公司 | Intelligent multi-path power supply control method, system and medium |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200403 |
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| CF01 | Termination of patent right due to non-payment of annual fee |