CN218243026U - AC-DC hybrid micro-grid coordinated power supply circuit of intelligent building system - Google Patents
AC-DC hybrid micro-grid coordinated power supply circuit of intelligent building system Download PDFInfo
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- CN218243026U CN218243026U CN202222152307.6U CN202222152307U CN218243026U CN 218243026 U CN218243026 U CN 218243026U CN 202222152307 U CN202222152307 U CN 202222152307U CN 218243026 U CN218243026 U CN 218243026U
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Abstract
The utility model relates to an AC/DC hybrid micro-grid coordinated power supply circuit of an intelligent building system, which comprises an AC/DC power supply switching circuit; the photovoltaic power generation power supply circuit stabilizes the voltage of a first direct current output by an external solar panel and outputs a second direct current, and the alternating current power supply circuit rectifies and reduces an external 220V alternating current commercial power into a third direct current; the second direct current is used for supplying power to the building electrical equipment by default, when the voltage of the first direct current is lower than the rated voltage, the alternating current and direct current power supply switching circuit is started to start the alternating current power supply circuit to supply power to the building electrical equipment by using the third direct current, and when the voltage of the first direct current is higher than the rated voltage, the second direct current is recovered to be used for supplying power to the building electrical equipment; the solar panel is used for supplying power in the daytime, 220V alternating current commercial power is used for supplying power at night or under the condition that the solar panel is insufficient in power supply, the alternating current and direct current hybrid micro-grid coordinated power supply is realized, the cost is low, the occupied area is small, and the installation and maintenance are simple.
Description
Technical Field
The utility model relates to an alternating current-direct current power supply switching circuit technical field, more specifically say, relate to an intelligent building system's mixed little electric wire netting of alternating current-direct current coordinates power supply circuit.
Background
With the popularization of photovoltaic power generation, more and more fields apply photovoltaic power generation technology to supply power to equipment, such as intelligent buildings. However, the photovoltaic power supply system used in the existing intelligent building system often includes an energy storage battery in addition to a photovoltaic power generation panel and a power generation power supply, and a solar panel used for charging the energy storage battery has large power and large floor area, which leads to serious increase of cost; and the energy storage battery is charged in the daytime and is discharged at night, so that the charging and discharging times of the energy storage battery are seriously used, and the service life of the energy storage battery is generally short. Therefore, an alternating current-direct current hybrid micro-grid coordinated power supply circuit which has photovoltaic power generation and power supply in the day and has alternating current commercial power supply in the night is needed to meet the power supply requirement of an intelligent building system so as to reduce the power consumption cost.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in, to the above-mentioned defect of prior art, provide a power supply circuit is coordinated to the mixed little electric wire netting of alternating current-direct current of with low costs, small intelligent building system.
The utility model provides a technical scheme that its technical problem adopted is:
the coordination power supply circuit of the alternating current-direct current hybrid microgrid of an intelligent building system is constructed and comprises an alternating current-direct current power supply switching circuit; the alternating current-direct current power supply switching circuit is connected with an alternating current power supply circuit, an external photovoltaic power generation power supply circuit and external building electric equipment, the photovoltaic power generation power supply circuit is used for stabilizing a first direct current output by an external solar panel and outputting a second direct current, and the alternating current power supply circuit is used for rectifying and reducing an external 220V alternating current commercial power into a third direct current; the voltage of the third direct current is greater than the voltage of the second direct current;
the alternating current power supply switching circuit is started to supply power to the building electric equipment by default by using second direct current, the alternating current power supply switching circuit is started to supply power to the building electric equipment by using the third direct current when the voltage of the first direct current is lower than a rated voltage, and the alternating current power supply switching circuit is closed to recover to supply power to the building electric equipment by using second direct current when the voltage of the first direct current is higher than the rated voltage;
and the photovoltaic power generation power circuit is connected with the alternating current power circuit.
Hybrid little electric wire netting of intelligent building system coordinate supply circuit, wherein, alternating current power supply circuit includes: the rectifier bridge, the switching power supply chip, the transformer and the photoelectric coupler;
the positive output end of the rectifier bridge is connected with the first end of the first primary coil of the transformer, and the negative output end of the rectifier bridge is connected with the second end of the second primary coil of the transformer;
the VDD end of the switching power supply chip is connected with a first resistor and a first capacitor, the other end of the first resistor is connected with the cathode of a first diode, the anode of the first diode is connected with the first end of a second primary coil of the transformer, and the other end of the first capacitor is connected with the second end of the second primary coil of the transformer;
the GATE end of the switching power supply chip is connected with a second resistor, a third resistor and a second diode, the other end of the second resistor is connected with the second end of a second primary coil of the transformer, the other end of the third resistor is connected with the grid electrode of the first field-effect tube, the cathode of the second diode is connected with the GATE end of the switching power supply chip, and the anode of the second diode is connected with the grid electrode of the first field-effect tube; the drain electrode of the first field effect transistor is connected with the second end of the first primary coil of the transformer and is also connected with the anode of a third triode, the cathode of the third triode is connected with a fourth resistor and a second capacitor, and the other ends of the fourth resistor and the second capacitor are both connected with the first end of the first primary coil of the transformer;
the source electrode of the first field effect transistor is connected with the SENSE end of the switching power supply chip and is also connected with a fifth resistor, and the other end of the fifth resistor is connected with the second end of the second primary coil of the transformer;
the GND end of the switching power supply chip is connected with the second end of the second primary coil of the transformer, the FB end of the switching power supply chip is connected with a sixth resistor, the other end of the sixth resistor is connected with the collector of the backlight detector of the photoelectric coupler and is also connected with a third capacitor, and the other end of the third capacitor is connected with the second end of the second primary coil of the transformer.
The utility model discloses an alternating current-direct current hybrid microgrid coordinated power supply circuit of intelligent building system, wherein, its characterized in that, the first end ground connection and the second end of the secondary coil of transformer are connected with the fourth diode, the negative pole of fourth diode is connected with seventh resistance, the other end of seventh resistance with photoelectric coupler's emitting diode's positive pole is connected, photoelectric coupler's emitting diode's negative pole is connected with the negative pole of voltage reference chip and still is connected with fourth electric capacity, the other end of fourth electric capacity is connected with eighth resistance, the other end of eighth resistance with the reference pole of voltage reference chip is connected;
the reference pole of the voltage reference chip is also connected with a ninth resistor and a tenth resistor, and the other end of the tenth resistor is connected with the anode of the voltage reference chip and grounded;
the negative electrode of the fourth diode is connected with an inductor, the other end of the inductor is connected with an energy storage capacitor, the positive electrode of the energy storage capacitor is connected with the other end of the inductor, and the negative electrode of the energy storage capacitor is grounded;
the other end of the inductor is a positive output end of a third direct current and is connected with a positive electrode of a power supply of the building electric equipment, and a negative electrode of the power supply of the building electric equipment is grounded.
The utility model discloses an alternating current-direct current hybrid micro-grid coordinated power supply circuit of intelligent building system, wherein, the anodal output of second direct current connects the positive pole of fifth diode, the negative pole of fifth diode with the negative pole of fourth diode is connected;
the alternating current-direct current power supply switching circuit comprises a voltage detection circuit, the voltage detection circuit comprises an eleventh resistor and a twelfth resistor, the eleventh resistor is connected with the positive electrode output end of the first direct current, the other end of the eleventh resistor is connected with the twelfth resistor, and the other end of the twelfth resistor is grounded; the photovoltaic power generation power circuit is a non-isolated power circuit;
the other end of the eleventh resistor is further connected with a thirteenth resistor and a fifth capacitor, and the other end of the fifth capacitor is grounded.
The utility model discloses an alternating current-direct current hybrid micro-grid coordinated power supply circuit of intelligent building system, wherein, alternating current-direct current power supply switching circuit still includes microcontroller and relay and second field effect transistor;
the first normally open end and the second normally open end of the relay are connected with the live wire and the zero wire of the 220V alternating current commercial power in a one-to-one mode, and the first public end and the second public end of the relay are connected with the first input end and the second input end of the rectifier bridge in a one-to-one mode;
the P0.0 end of the microcontroller is connected with the grid electrode of the second field effect transistor, the drain electrode of the second field effect transistor is connected with the second end of the coil of the relay, and the source electrode of the second field effect transistor is grounded; the first end of the coil of the relay is connected with the positive electrode of the 5V direct-current power supply and is also connected with a sixth diode, the negative electrode of the sixth diode is connected with the first end of the coil of the relay, and the positive electrode of the sixth diode is connected with the second end of the coil of the relay;
and the P1.0 end of the microcontroller is connected with the other end of the thirteenth resistor.
Hybrid little electric wire netting of intelligent building system coordinate supply circuit, wherein, the model CR6850 of switching power supply chip.
Hybrid little electric wire netting of intelligent building system coordinate supply circuit, wherein, microcontroller's model STC12C5410AD.
The beneficial effects of the utility model reside in that: the photovoltaic power generation power supply circuit stabilizes the voltage of a first direct current output by an external solar panel and outputs a second direct current, and the alternating current power supply circuit rectifies and reduces an external 220V alternating current commercial power into a third direct current; the voltage of the third direct current is greater than that of the second direct current; defaulting to use the second direct current to provide power supply for the building electrical equipment, starting the alternating current power supply circuit by using the alternating current power supply switching circuit when the voltage of the first direct current is lower than the rated voltage to provide power supply for the building electrical equipment by using the third direct current, and closing the alternating current power supply circuit by using the alternating current power supply switching circuit to recover to use the second direct current to provide power supply for the building electrical equipment when the voltage of the first direct current is higher than the rated voltage; use solar panel to provide power supply for building consumer in order to realize having daytime, use 220V alternating current commercial power to provide power supply for building consumer at night or under the not enough condition of solar panel power supply, realize that the little electric wire netting of alternating current-direct current mixes coordinates the power supply, and with low costs, area is little, and the installation is maintained simply.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be further described below with reference to the accompanying drawings and embodiments, wherein the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained without inventive work according to the drawings:
fig. 1 is a schematic circuit diagram of an ac power supply circuit of the ac/dc hybrid microgrid coordinated power supply circuit of the intelligent building system according to the preferred embodiment of the present invention;
fig. 2 is a schematic circuit diagram of a voltage detection circuit of the ac/dc hybrid microgrid coordinated power supply circuit of the intelligent building system according to the preferred embodiment of the present invention;
fig. 3 is a schematic circuit diagram of the microcontroller and the relay of the ac/dc hybrid microgrid coordinated power supply circuit of the intelligent building system according to the preferred embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the following description will be made clearly and completely in conjunction with the technical solutions in the embodiments of the present invention, and obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
The ac/dc hybrid microgrid coordinated power supply circuit of the intelligent building system according to the preferred embodiment of the present invention is shown in fig. 1, and also refer to fig. 2 to 3; the device comprises an alternating current and direct current power supply switching circuit (shown in figures 2 and 3); the alternating current-direct current power supply switching circuit is connected with an alternating current power supply circuit 100, an external photovoltaic power generation power supply circuit and external building electric equipment, the photovoltaic power generation power supply circuit is used for stabilizing a first direct current output by an external solar panel and then outputting a second direct current, and the alternating current power supply circuit 100 is used for rectifying and reducing an external 220V alternating current commercial power into a third direct current; the voltage of the third direct current is greater than that of the second direct current;
defaults to use the second direct current to provide power supply for the building electrical equipment, when the voltage of the first direct current is lower than the rated voltage, the alternating current and direct current power supply switching circuit starts the alternating current power supply circuit 100 to use the third direct current to provide power supply for the building electrical equipment, and when the voltage of the first direct current is higher than the rated voltage, the alternating current and direct current power supply switching circuit closes the alternating current power supply circuit 100 to recover to use the second direct current to provide power supply for the building electrical equipment;
the photovoltaic power generation power circuit is connected with the alternating current power circuit 100;
the photovoltaic power generation power supply circuit stabilizes the voltage of the first direct current output by the external solar panel and outputs a second direct current, and the alternating current power supply circuit 100 rectifies and reduces the external 220V alternating current commercial power into a third direct current; the voltage of the third direct current is greater than that of the second direct current; defaulting to use the second direct current to provide power supply for the building electrical equipment, starting the alternating current power supply switching circuit 100 to use the third direct current to provide power supply for the building electrical equipment when the voltage of the first direct current is lower than the rated voltage, and closing the alternating current power supply switching circuit 100 to recover to use the second direct current to provide power supply for the building electrical equipment when the voltage of the first direct current is higher than the rated voltage; use solar panel to provide power supply for building consumer in order to realize having daytime, use 220V alternating current commercial power to provide power supply for building consumer at night or under the not enough condition of solar panel power supply, realize that the little electric wire netting of alternating current-direct current mixes coordinates the power supply, and with low costs, area is little, and the installation is maintained simply.
As shown in fig. 1, the ac power supply circuit 100 includes: the rectifier bridge B1, the switching power supply chip U1, the transformer T1 and the photoelectric coupler U2;
the positive output end of the rectifier bridge B1 is connected with the first end of the first primary coil of the transformer T1, and the negative output end of the rectifier bridge B1 is connected with the second end of the second primary coil of the transformer T1;
the VDD end of the switching power supply chip U1 is connected with a first resistor R11 and a first capacitor C4, the other end of the first resistor R11 is connected with the cathode of a first diode D5, the anode of the first diode D5 is connected with the first end of a second primary coil of the transformer T1, and the other end of the first capacitor C4 is connected with the second end of the second primary coil of the transformer T1; the rectifier and filter are used for providing power supply for the switching power supply chip U1;
the GATE end of the switching power supply chip U1 is connected with a second resistor R4, a third resistor R6 and a second diode D3, the other end of the second resistor R4 is connected with the second end of the second primary coil of the transformer T1, the other end of the third resistor R6 is connected with the GATE of the first field-effect tube Q1, the cathode of the second diode D3 is connected with the GATE end of the switching power supply chip U1, and the anode of the second diode D3 is connected with the GATE of the first field-effect tube Q1; so as to carry out voltage division and current limiting protection on the first field effect transistor Q1; the drain electrode of the first field effect transistor Q1 is connected with the second end of the first primary coil of the transformer T1 and is also connected with the anode of a third triode D4, the cathode of the third triode D4 is connected with a fourth resistor R9 and a second capacitor C3, and the other ends of the fourth resistor R9 and the second capacitor C3 are both connected with the first end of the first primary coil of the transformer T1; so as to start oscillation to generate alternating current for the transformer T1 to work;
the source electrode of the first field-effect tube Q1 is connected with the SENSE end of the switching power supply chip U1 and is also connected with a fifth resistor R10, and the other end of the fifth resistor R10 is connected with the second end of the second primary coil of the transformer T1; the current flowing through the power tube is converted by detecting the voltage on the fifth resistor R10, and the power is adjusted by adjusting the working duty ratio of the first field effect tube Q1;
the GND end of the switching power supply chip U1 is connected with the second end of the second primary coil of the transformer T1, the FB end of the switching power supply chip U1 is connected with a sixth resistor R5, the other end of the sixth resistor R5 is connected with the collector electrode of the backlight detector of the photoelectric coupler U2 and is also connected with a third capacitor C1, and the other end of the third capacitor C1 is connected with the second end of the second primary coil of the transformer T1; so as to feed back the output voltage of the secondary coil of the transformer T1 through the photoelectric coupler U2, and further adjust the working frequency of the first field effect transistor Q1 to perform voltage stabilization output.
As shown in fig. 1 and 2, a first end of a secondary coil of the transformer T1 is grounded, a second end of the secondary coil is connected to a fourth diode D2, a negative electrode of the fourth diode D2 is connected to a seventh resistor R14, the other end of the seventh resistor R14 is connected to a positive electrode of a light emitting diode of the photocoupler U2, a negative electrode of the light emitting diode of the photocoupler U2 is connected to a cathode of the voltage reference chip U3 and is further connected to a fourth capacitor C10, the other end of the fourth capacitor C10 is connected to an eighth resistor R16, and the other end of the eighth resistor R16 is connected to a reference electrode of the voltage reference chip U3; a voltage reference chip U3 is arranged to enable a light-emitting circuit of a light-emitting diode of a photoelectric coupler U2 to change along with the change of voltage, so that the FB end of a switching power supply chip U1 can detect the output voltage of a transformer T1;
the reference pole of the voltage reference chip U3 is also connected with a ninth resistor R18 and a tenth resistor R17, and the other end of the tenth resistor R17 is connected with the anode of the voltage reference chip U3 and grounded; so as to meet the use requirement of the voltage reference chip U3;
the negative electrode of the fourth diode D2 is connected with an inductor L1, the other end of the inductor L1 is connected with an energy storage capacitor C9, the positive electrode of the energy storage capacitor C9 is connected with the other end of the inductor L1, and the negative electrode of the energy storage capacitor C9 is grounded; the energy storage capacitor C9 is used for making up the condition of insufficient instantaneous power output when the alternating current power supply circuit 100 is switched to use for supplying power;
the other end of the inductor L1 is a positive output end of the third direct current and is connected with a positive power supply of the building electric equipment, and a negative power supply of the building electric equipment is grounded.
As shown in fig. 1, the positive output end of the second direct current is connected to the positive electrode of a fifth diode D1, and the negative electrode of the fifth diode D1 is connected to the negative electrode of a fourth diode D2; to prevent the current from flowing backward, and at the same time, to perform further rectification,
the alternating current-direct current power supply switching circuit comprises a voltage detection circuit 200, the voltage detection circuit 200 comprises an eleventh resistor R102 and a twelfth resistor R103, the eleventh resistor R102 is connected with the positive output end of the first direct current, the other end of the eleventh resistor R102 is connected with the twelfth resistor R103, and the other end of the twelfth resistor R103 is grounded; the photovoltaic power generation power circuit is a non-isolated power circuit;
the other end of the eleventh resistor R102 is further connected with a thirteenth resistor R104 and a fifth capacitor C104, and the other end of the fifth capacitor C104 is grounded; the circuit is simple, the cost is low, and the volume is small.
As shown in fig. 1 and fig. 3, the ac/dc power supply switching circuit further includes a microcontroller U4, a relay K1, and a second field effect transistor Q2;
the first normally open end and the second normally open end of the relay K1 are connected with a live wire and a zero wire of 220V alternating current commercial power in a one-to-one mode, and the first public end and the second public end of the relay K1 are connected with the first input end and the second input end of the rectifier bridge B1 in a one-to-one mode;
the P0.0 end of the microcontroller U4 is connected with the grid electrode of the second field effect tube Q2, the drain electrode of the second field effect tube Q2 is connected with the second end of the coil of the relay K1, and the source electrode is grounded; the first end of the coil of the relay K1 is connected with the positive electrode of the 5V direct-current power supply and is also connected with a sixth diode D6, the negative electrode of the sixth diode D6 is connected with the first end of the coil of the relay K1, and the positive electrode of the sixth diode D6 is connected with the second end of the coil of the relay K1; the P1.0 end of the microcontroller U4 is connected with the other end of the thirteenth resistor R104; the circuit is simple, the cost is low, and the volume is small.
As shown in fig. 1, the switching power supply chip U1 has a model CR6850; low cost, and can control large output power and stable output.
As shown in fig. 3, the microcontroller U4 has a model STC12C5410AD; the voltage detection circuit has an analog-to-digital conversion function so as to detect voltage.
It will be understood that modifications and variations are possible to those skilled in the art in light of the above teachings and that all such modifications and variations are considered to be within the purview of the invention as set forth in the appended claims.
Claims (7)
1. An alternating current-direct current hybrid microgrid coordinated power supply circuit of an intelligent building system comprises an alternating current-direct current power supply switching circuit; the photovoltaic power generation circuit is used for stabilizing the first direct current output by the external solar panel and then outputting a second direct current, and the alternating current power supply circuit is used for rectifying and reducing the external 220V alternating current commercial power into a third direct current; the voltage of the third direct current is greater than the voltage of the second direct current;
defaulting to use a second direct current to provide power supply for the building electric equipment, starting the alternating current power supply circuit by using the alternating current and direct current power supply switching circuit to provide power supply for the building electric equipment by using the third direct current when the voltage of the first direct current is lower than a rated voltage, and closing the alternating current power supply circuit by using the alternating current and direct current power supply switching circuit to restore to provide power supply for the building electric equipment by using a second direct current when the voltage of the first direct current is higher than the rated voltage;
and the photovoltaic power generation power circuit is connected with the alternating current power circuit.
2. The AC/DC hybrid micro-grid coordinated power supply circuit of the intelligent building system according to claim 1, wherein the AC power supply circuit comprises: the device comprises a rectifier bridge, a switching power supply chip, a transformer and a photoelectric coupler;
the positive output end of the rectifier bridge is connected with the first end of the first primary coil of the transformer, and the negative output end of the rectifier bridge is connected with the second end of the second primary coil of the transformer;
the VDD end of the switching power supply chip is connected with a first resistor and a first capacitor, the other end of the first resistor is connected with the cathode of a first diode, the anode of the first diode is connected with the first end of a second primary coil of the transformer, and the other end of the first capacitor is connected with the second end of the second primary coil of the transformer;
the GATE end of the switching power supply chip is connected with a second resistor, a third resistor and a second diode, the other end of the second resistor is connected with the second end of a second primary coil of the transformer, the other end of the third resistor is connected with the grid electrode of the first field-effect tube, the cathode of the second diode is connected with the GATE end of the switching power supply chip, and the anode of the second diode is connected with the grid electrode of the first field-effect tube; the drain electrode of the first field effect transistor is connected with the second end of the first primary coil of the transformer and is also connected with the anode of a third triode, the cathode of the third triode is connected with a fourth resistor and a second capacitor, and the other ends of the fourth resistor and the second capacitor are both connected with the first end of the first primary coil of the transformer;
the source electrode of the first field effect transistor is connected with the SENSE end of the switching power supply chip and is also connected with a fifth resistor, and the other end of the fifth resistor is connected with the second end of the second primary coil of the transformer;
the GND end of the switching power supply chip is connected with the second end of the second primary coil of the transformer, the FB end of the switching power supply chip is connected with a sixth resistor, the other end of the sixth resistor is connected with the collector of the backlight detector of the photoelectric coupler and is also connected with a third capacitor, and the other end of the third capacitor is connected with the second end of the second primary coil of the transformer.
3. The AC-DC hybrid micro-grid coordinated power supply circuit of the intelligent building system as claimed in claim 2, wherein a first end of a secondary coil of the transformer is grounded and a second end thereof is connected with a fourth diode, a cathode of the fourth diode is connected with a seventh resistor, the other end of the seventh resistor is connected with an anode of a light emitting diode of the photoelectric coupler, the cathode of the light emitting diode of the photoelectric coupler is connected with a cathode of a voltage reference chip and is further connected with a fourth capacitor, the other end of the fourth capacitor is connected with an eighth resistor, and the other end of the eighth resistor is connected with a reference electrode of the voltage reference chip;
the reference electrode of the voltage reference chip is also connected with a ninth resistor and a tenth resistor, and the other end of the tenth resistor is connected with the anode of the voltage reference chip and is grounded;
the negative electrode of the fourth diode is connected with an inductor, the other end of the inductor is connected with an energy storage capacitor, the positive electrode of the energy storage capacitor is connected with the other end of the inductor, and the negative electrode of the energy storage capacitor is grounded;
the other end of the inductor is a positive output end of a third direct current and is connected with a positive electrode of a power supply of the building electric equipment, and a negative electrode of the power supply of the building electric equipment is grounded.
4. The AC-DC hybrid microgrid coordinated power supply circuit for an intelligent building system according to claim 3, wherein a positive electrode output end of the second direct current is connected with a positive electrode of a fifth diode, and a negative electrode of the fifth diode is connected with a negative electrode of the fourth diode;
the alternating current-direct current power supply switching circuit comprises a voltage detection circuit, the voltage detection circuit comprises an eleventh resistor and a twelfth resistor, the eleventh resistor is connected with the positive electrode output end of the first direct current, the other end of the eleventh resistor is connected with the twelfth resistor, and the other end of the twelfth resistor is grounded; the photovoltaic power generation power circuit is a non-isolated power circuit;
the other end of the eleventh resistor is further connected with a thirteenth resistor and a fifth capacitor, and the other end of the fifth capacitor is grounded.
5. The AC/DC hybrid micro-grid coordinated power supply circuit of the intelligent building system according to claim 4, wherein the AC/DC power supply switching circuit further comprises a microcontroller and a relay, and a second field effect transistor;
the first normally-open end and the second normally-open end of the relay are connected with the live wire and the zero wire of the 220V alternating current mains supply in a one-to-one manner, and the first public end and the second public end of the relay are connected with the first input end and the second input end of the rectifier bridge in a one-to-one manner;
the P0.0 end of the microcontroller is connected with the grid electrode of the second field effect transistor, the drain electrode of the second field effect transistor is connected with the second end of the coil of the relay, and the source electrode of the second field effect transistor is grounded; the first end of the coil of the relay is connected with the positive electrode of the 5V direct-current power supply and is also connected with a sixth diode, the negative electrode of the sixth diode is connected with the first end of the coil of the relay, and the positive electrode of the sixth diode is connected with the second end of the coil of the relay;
and the P1.0 end of the microcontroller is connected with the other end of the thirteenth resistor.
6. The AC-DC hybrid micro-grid coordinated power supply circuit of the intelligent building system as claimed in claim 2, wherein the switching power supply chip has a model number CR6850.
7. The AC-DC hybrid microgrid coordinated power supply circuit of an intelligent building system according to claim 5, wherein the microcontroller is of the type STC12C5410AD.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222152307.6U CN218243026U (en) | 2022-08-16 | 2022-08-16 | AC-DC hybrid micro-grid coordinated power supply circuit of intelligent building system |
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| CN202222152307.6U CN218243026U (en) | 2022-08-16 | 2022-08-16 | AC-DC hybrid micro-grid coordinated power supply circuit of intelligent building system |
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2022
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