CN209913497U - Three-phase power supply circuit and device - Google Patents
Three-phase power supply circuit and device Download PDFInfo
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- CN209913497U CN209913497U CN201920073819.9U CN201920073819U CN209913497U CN 209913497 U CN209913497 U CN 209913497U CN 201920073819 U CN201920073819 U CN 201920073819U CN 209913497 U CN209913497 U CN 209913497U
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- 238000001514 detection method Methods 0.000 claims abstract description 21
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
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Abstract
The utility model belongs to the technical field of the distribution, a three-phase supply circuit and device are provided. The three-phase power supply circuit is connected with a load, and comprises: the three-phase power supply comprises a main power supply and three phase lines connected with the main power supply and is configured to supply power to the load; the three phase lines comprise an A-phase line, a B-phase line and a C-phase line which are all connected with the main power supply; the detection circuit is connected with the three phase lines and is configured to detect the current on each phase line in the three phase lines; the phase selection switch circuit is connected with the three phase lines and is configured to switch on or off the power supply of the three phase lines to the load; and the main controller is connected with the detection circuit and the phase selection switch circuit and is configured to output a control instruction according to the current on each phase line of the three phase lines so as to control the phase selection switch circuit to conduct the power supply of one phase line of the three phase lines to the load.
Description
Technical Field
The utility model belongs to the technical field of the distribution, especially, relate to a three-phase supply circuit and device.
Background
At present, if a power receiver is in a single-phase power supply condition, power supply/power selling main control equipment determines whether to supply power according to the amount of power balance, namely, a power supply switch is closed or opened, and a power supply of a certain phase is directly output. The harm of unbalanced power supply is not only energy loss, and the line loss increases, and the bigger harm is that the power consumption potential safety hazard is very big, causes the circuit to transship, and power supply unit is overheated, surpasss the balanced standard requirement of national power consumption three-phase, causes the personal and loss of property very easily.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a three-phase supply circuit and device, the circuit that aims at existence among the solution traditional technical scheme transships easily, the line loss is big, cause the problem of the person and loss of property very easily.
A three-phase power supply circuit connected to a load, the three-phase power supply circuit comprising:
the three-phase power supply comprises a main power supply and three phase lines connected with the main power supply and is configured to supply power to the load; the three phase lines comprise an A-phase line, a B-phase line and a C-phase line which are all connected with the main power supply;
the detection circuit is connected with the three phase lines and is configured to detect the current on each phase line in the three phase lines;
the phase selection switch circuit is connected with the three phase lines and is configured to switch on or off the power supply of the three phase lines to the load;
and the main controller is connected with the detection circuit and the phase selection switch circuit and is configured to output a control instruction according to the current on each phase line of the three phase lines so as to control the phase selection switch circuit to conduct the power supply of one phase line of the three phase lines to the load.
In one embodiment, the detection circuit includes three current transformers and a conversion circuit, the three current transformers are respectively disposed on the three phase lines and configured to detect currents of the respective phase lines, and the conversion circuit is connected to the three current transformers and configured to convert analog signals output by the three current transformers into digital signals.
In one embodiment, the phase selection switch circuit comprises a slave controller, a first switch, a second switch and a third switch; the input of first switch is connected A looks phase line, the input of second switch is connected B looks phase line, the input of third switch is connected C looks phase line, the output of first switch, the output of second switch and the output of third switch connects after connecing altogether the load, from the controller with main control unit connects, configures to and receives control command, control first switch, the second switch with one of them switch of third switch switches on.
In one embodiment, when any one of the first switch, the second switch and the third switch is turned on, the remaining two switches are kept in an off state.
In one embodiment, the wireless communication unit is connected with the main control and the phase selection switch circuit and configured to transmit the control instruction to the phase selection switch circuit.
In one embodiment, the metering circuit is connected between the phase selection switch circuit and the load and is configured to meter the electric energy output to the load in real time.
In one embodiment, the metering circuit is connected with the main controller, the main controller receives an electric quantity output value output by the metering circuit, and when the electric quantity output value is equal to a preset electric quantity value, the main controller controls the phase selection switch circuit to turn off power supply of the three phase lines to the load.
In one embodiment, the master controller comprises a comparison circuit and a control instruction generation circuit; the comparison circuit is connected with the detection circuit, the control instruction generation circuit is connected with the comparison circuit, and the control instruction generation circuit generates the control instruction according to a comparison result output by the comparison circuit.
Furthermore, there is provided a three-phase power supply device connected to a load, the three-phase power supply device including: the three-phase power supply circuit is provided.
According to the three-phase power supply circuit, the detection circuit detects the current on each phase line of the three phase lines, and the main controller outputs a control instruction according to the current on each phase line of the three phase lines so as to control the phase selection switch circuit to conduct the power supply of one phase line of the three phase lines to the load. The overload of the power supply circuit is prevented, the circuit loss is reduced, the power supply circuit meets the national standard requirement of three-phase balance of power utilization, and the personal and property safety of power utilization personnel is ensured.
Drawings
Fig. 1 is a schematic structural diagram of a three-phase power supply circuit provided in an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a three-phase power supply circuit according to another embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Fig. 1 shows a schematic structural diagram of a three-phase power supply circuit provided in an embodiment of the present invention, and for convenience of description, only the parts related to this embodiment are shown, which are detailed as follows:
the utility model provides a three-phase power supply circuit is connected with load 2, and this three-phase power supply circuit includes: three-phase power supply, detection circuit 20, phase selection switch circuit 30 and main controller 40. The detection circuit 20 detects the current on each of the three phase lines, and the main controller 40 outputs a control command according to the current on each of the three phase lines to control the phase selection switch circuit 30 to conduct one of the three phase lines to supply power to the load 2. The overload of the power supply circuit is prevented, the circuit loss is reduced, the power supply circuit meets the national standard requirement of three-phase balance of power utilization, and the personal and property safety of power utilization personnel is ensured.
Wherein the three-phase power supply comprises a main power supply 11 and three phase lines connected to the main power supply 11 and configured to supply power to the load 2. Specifically, the main power supply 11 is a three-phase power supply that is connected from a commercial power supply through a transformer or is directly output from a power generation device, and supplies a required power supply to the load 2 through three phase lines. The three phase lines include a phase line B A, B and a phase line C connected to the main power supply 11, the phase lines B A, B and C are independent from each other, the output single-phase voltage and the output single-phase current are different, and any one of the phase lines can independently provide power for the load 2 in practical application.
The detection circuit 20 is connected to the three phase lines and is configured to detect current on each of the three phase lines. It can be understood that, due to the influence of the load 2 or the main power supply 11, the currents on the three phase lines will change continuously, and the detection circuit 20 will detect the magnitude of the current of each of the three phase lines in real time, so as to implement real-time monitoring of the current of each phase line. In one embodiment, the detection circuit 20 includes three current transformers respectively disposed on the three phase lines and configured to detect currents of the respective phase lines, and a conversion circuit connected to the three current transformers and configured to convert analog signals output by the three current transformers into digital signals. Specifically, phase lines B and C of the phase line A, B a are respectively and correspondingly provided with a current transformer, the three current transformers have the same sampling frequency, and the three current transformers simultaneously sample the current of the phase line B A, B a and the phase line C, so as to ensure that the obtained current value is the current of each phase line at the same time.
The phase selection switch circuit 30 is connected to the three phase lines, and configured to turn on or off the power supplied to the load 2 by the three phase lines. The phase selection switch circuit 30 includes a slave controller 31, a first switch K1, a second switch K2, and a third switch K3; the input end of a first switch K1 is connected with an A-phase line A, the input end of a second switch K2 is connected with a B-phase line B, the input end of a third switch K3 is connected with a C-phase line C, the output end of the first switch K1, the output end of the second switch K2 and the output end of the third switch K3 are connected with the load 2 after being connected together, and the slave controller 31 is connected with the master controller 40 and configured to receive a control command and control one of the first switch K1, the second switch K2 and the third switch K3 to be conducted. When any one of the first switch K1, the second switch K2, and the third switch K3 is turned on, the remaining two switches are kept in an off state.
The main controller 40 is connected to the detection circuit 20 and the phase selection switch circuit 30, and configured to output a control instruction according to a current on each of the three phase lines, so as to control the phase selection switch circuit 30 to conduct one of the three phase lines to supply power to the load 2. The main controller 40 includes a comparison circuit and a control instruction generation circuit; the comparison circuit is connected to the detection circuit 20, the control command generation circuit is connected to the comparison circuit, and the control command generation circuit generates a control command based on a comparison result output from the comparison circuit. Specifically, the comparison circuit compares the current values of the phase line B of the phase line a A, B and the phase line C of the phase line a collected at the same time, confirms the phase line corresponding to the minimum current value, turns on the switch connected to the corresponding phase line, and supplies power to the load 2 through the phase line. For example, if the current value of the phase line a of the phase a among the current values sampled by the detection circuit 20 is the minimum, the master controller 40 sends a control command to the slave controller 31, the slave controller 31 controls to turn on the first switch K1, turn off the second switch K2 and the third switch K3, and supply the power required by the load 2 through the phase line a of the phase a. The three-phase power supply circuit further includes a wireless communication unit, which is connected to the master controller and the slave controller 31 and configured to transmit a control instruction to the slave controller 31.
In one embodiment, the three-phase power supply circuit further includes a metering circuit, which is connected between the phase selection switch circuit 30 and the load 2 and is configured to meter the electric energy output to the load 2 in real time. The metering circuit is connected with the main controller 40, the main controller 40 receives the electric quantity output value output by the metering circuit, and when the electric quantity output value is equal to the preset electric quantity value, the main controller 40 controls the phase selection switch circuit 30 to cut off the power supply of the three phase lines to the load 2. The utility model provides a three-phase supply circuit can fill in electric sales system such as electric pile.
Furthermore, on the basis of foretell three-phase supply circuit, the utility model also provides a three-phase power supply unit, this three-phase power supply unit includes foretell three-phase supply circuit.
To sum up, the utility model provides a three-phase supply circuit and device is connected with load 2, and this three-phase supply circuit includes: three-phase power supply, detection circuit 20, phase selection switch circuit 30 and main controller 40. The detection circuit 20 detects the current on each of the three phase lines, and the main controller 40 outputs a control command according to the current on each of the three phase lines to control the phase selection switch circuit 30 to conduct one of the three phase lines to supply power to the load 2. The overload of the power supply circuit is prevented, the circuit loss is reduced, the power supply circuit meets the national standard requirement of three-phase balance of power utilization, and the personal and property safety of power utilization personnel is ensured.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (9)
1. A three-phase power supply circuit connected to a load, the three-phase power supply circuit comprising:
the three-phase power supply comprises a main power supply and three phase lines connected with the main power supply and is configured to supply power to the load; the three phase lines comprise an A-phase line, a B-phase line and a C-phase line which are all connected with the main power supply;
the detection circuit is connected with the three phase lines and is configured to detect the current on each phase line in the three phase lines in real time;
the phase selection switch circuit is connected with the three phase lines and is configured to switch on or off the power supply of the three phase lines to the load;
and the main controller is connected with the detection circuit and the phase selection switch circuit and is configured to output a control instruction according to the current on each phase line of the three phase lines so as to control the phase selection switch circuit to conduct the power supply of one phase line of the three phase lines to the load.
2. The three-phase power supply circuit according to claim 1, wherein the detection circuit comprises three current transformers respectively disposed on the three phase lines and configured to detect the currents of the respective phase lines, and a conversion circuit connected to the three current transformers and configured to convert the analog signals output by the three current transformers into digital signals.
3. The three-phase power supply circuit of claim 1 wherein the phase-selection switch circuit includes a slave controller, a first switch, a second switch, and a third switch; the input of first switch is connected A looks phase line, the input of second switch is connected B looks phase line, the input of third switch is connected C looks phase line, the output of first switch, the output of second switch and the output of third switch connects after connecing altogether the load, from the controller with main control unit connects, configures to and receives control command, control first switch, the second switch with one of them switch of third switch switches on.
4. The three-phase power supply circuit of claim 3 wherein when any of the first switch, the second switch, and the third switch is on, the remaining two switches remain off.
5. The three-phase power supply circuit of claim 1, further comprising a wireless communication unit coupled to the main control and the phase selection switch circuit and configured to transmit the control command to the phase selection switch circuit.
6. The three-phase power supply circuit of claim 1 further comprising a metering circuit coupled between the phase selection switch circuit and the load and configured to meter the electrical energy output to the load in real time.
7. The three-phase power supply circuit of claim 6, wherein the metering circuit is connected to the main controller, the main controller receives the power output value outputted by the metering circuit, and when the power output value is equal to a preset power value, the main controller controls the phase selection switch circuit to turn off the power supply of the three phase wires to the load.
8. The three-phase power supply circuit of claim 1 wherein the master controller includes a comparison circuit and a control instruction generation circuit; the comparison circuit is connected with the detection circuit, the control instruction generation circuit is connected with the comparison circuit, and the control instruction generation circuit generates the control instruction according to a comparison result output by the comparison circuit.
9. A three-phase power supply apparatus connected to a load, the three-phase power supply apparatus comprising: a three-phase power supply circuit as claimed in any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920073819.9U CN209913497U (en) | 2019-01-16 | 2019-01-16 | Three-phase power supply circuit and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920073819.9U CN209913497U (en) | 2019-01-16 | 2019-01-16 | Three-phase power supply circuit and device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209913497U true CN209913497U (en) | 2020-01-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920073819.9U Expired - Fee Related CN209913497U (en) | 2019-01-16 | 2019-01-16 | Three-phase power supply circuit and device |
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| Country | Link |
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| CN (1) | CN209913497U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117434878A (en) * | 2023-12-22 | 2024-01-23 | 山东朝辉自动化科技有限责任公司 | Monitoring device for digital stock ground intelligent control equipment based on unmanned aerial vehicle |
-
2019
- 2019-01-16 CN CN201920073819.9U patent/CN209913497U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117434878A (en) * | 2023-12-22 | 2024-01-23 | 山东朝辉自动化科技有限责任公司 | Monitoring device for digital stock ground intelligent control equipment based on unmanned aerial vehicle |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200107 |