CN215911940U - UPS power supply device of power acquisition equipment - Google Patents
UPS power supply device of power acquisition equipment Download PDFInfo
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- CN215911940U CN215911940U CN202122390344.6U CN202122390344U CN215911940U CN 215911940 U CN215911940 U CN 215911940U CN 202122390344 U CN202122390344 U CN 202122390344U CN 215911940 U CN215911940 U CN 215911940U
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Abstract
The utility model provides a UPS (uninterrupted Power supply) power supply device of power acquisition equipment, which comprises a static switch Q3, a normally closed relay, a mains supply self-checking control circuit, a second rectification circuit REC2, a filter circuit FIL, a charging and discharging management circuit U2, a storage battery BAT, a normally open relay, an inverter DC/AC, a transformer T2, a control unit and a relay control circuit, wherein the normally closed relay is connected with the mains supply self-checking control circuit; one end of a switch K1 of the normally closed relay is used as a mains supply input end, the other end of a switch K1 of the normally closed relay is connected with the input end of a static switch, and the output end of the static switch is used as a mains supply output end; the mains supply self-checking circuit is used for detecting overvoltage, undervoltage and power-off states of mains supply and outputting control signals to the control end of the static switch and the control end of the relay control circuit, and the mains supply self-checking circuit also outputs state signals to the control unit; the continuous and stable work of the acquisition terminal is ensured, the continuity and the stability of data acquisition are further ensured, and the whole structure is simple and reliable, the stability is high, and the cost is low.
Description
Technical Field
The utility model relates to a power supply system, in particular to a UPS power supply device of power acquisition equipment.
Background
In an electric power system, an information acquisition terminal is an important component of a power consumer centralized meter reading system and is used for acquiring information of each power node, so that intelligent management of electric power is realized.
In the prior art, the information acquisition terminal is generally powered by mains supply, but mains supply has voltage fluctuation, so that the data acquisition terminal is affected, such as stability and service life, on the other hand, after the mains supply is powered off, the acquisition terminal completely stops working, which is unwilling to see in a power system.
Therefore, in order to solve the above technical problems, it is necessary to provide a new technical means.
SUMMERY OF THE UTILITY MODEL
In view of the above, an object of the present invention is to provide a UPS power supply device for a power acquisition device, which performs mains supply self-check at the initial power supply and during the power supply process of a power information acquisition terminal and timely cuts in a load power supply loop when the mains supply is over-voltage, under-voltage, and power is off, so as to ensure that the acquisition terminal can continuously and stably operate, and further ensure the continuity and stability of data acquisition.
The utility model provides a UPS (uninterrupted Power supply) power supply device of power acquisition equipment, which comprises a static switch Q3, a normally closed relay, a mains supply self-checking control circuit, a second rectification circuit REC2, a filter circuit FIL, a charging and discharging management circuit U2, a storage battery BAT, a normally open relay, an inverter DC/AC, a transformer T2, a control unit and a relay control circuit, wherein the normally closed relay is connected with the mains supply self-checking control circuit;
one end of a switch K1 of the normally closed relay is used as a mains supply input end, the other end of a switch K1 of the normally closed relay is connected with the input end of a static switch, and the output end of the static switch is used as a mains supply output end;
the mains supply self-checking circuit is used for detecting overvoltage, undervoltage and power-off states of mains supply and outputting control signals to the control end of the static switch and the control end of the relay control circuit, and the mains supply self-checking circuit also outputs state signals to the control unit;
the input end of the second rectifying circuit REC2 is connected to a common connection point between the switch K1 and the static switch, the output end of the second rectifying circuit is connected with the input end of the filter circuit FIL, the output end of the filter circuit FIL is connected with the input end of the charge and discharge management circuit U2, and the output end of the charge and discharge management circuit U2 is connected with the anode of the storage battery BAT through a diode D1;
the input end of the inverter DC/AC is connected with the anode of the battery BAT through a switch K2 of a normally open relay, the output end of the inverter DC/AC is connected with the input end of a transformer T2, the output end of the transformer T2 is connected with one end of a static switch Q3 serving as the output end, and the control unit outputs a control command to the inverter DC/AC and relay control circuit.
Further, the commercial power self-checking control circuit comprises a transformer T1, a first rectification circuit REC1, an input filter circuit, an operational amplifier U1, a resistor R3, a resistor R19, a detection control circuit and a direct current conversion circuit DC-DC I;
a primary winding of the transformer T1 is connected in series between a switch K1 and a static switch Q3 of a normally closed relay, one end of a secondary winding of the transformer T1 is connected to a positive input end of a first rectification circuit REC1, one end of a secondary winding of the transformer T1 is grounded, a positive output end of the first rectification circuit REC1 is connected with an input end of an input filter circuit, an output end of the input filter circuit is connected to a same-phase end of an operational amplifier U1, an opposite-phase end of the operational amplifier U1 is directly connected with an output end of an operational amplifier U1 to form a voltage follower, an output end of the operational amplifier U1 is connected with one end of a resistor R3, the other end of the resistor R3 is connected with one end of a resistor R19, and the other end of the resistor R19 is used as a second detection output end of a mains supply self-detection control circuit and is connected with an input end of a control unit;
the common connection point of the resistor R3 and the resistor R19 is connected with the input end of the detection control circuit, the input end of the direct current conversion circuit DC-DC I is connected with the common connection point of the resistor R3 and the resistor R19, and the output end of the direct current conversion circuit DC-DC I outputs direct current VCC1 and supplies power to the detection control circuit.
Further, the detection control circuit comprises a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a resistor R10, a resistor R11, a resistor R12, a resistor R13, a triode Q1, a triode Q2, a triode Q3, a triode Q4 and a triode Q5;
the triode Q1, the triode Q2 and the triode Q5 are all P-type triodes;
the base electrode of the triode Q1 is connected to a common connection point between the resistor R3 and the resistor R19, the emitter electrode of the triode Q1 is grounded after being connected in series with the resistor R6 through the resistor R5, and the common connection point between the resistor R5 and the resistor R6 is connected to a power supply VCC1 through the resistor R4; the collector of a triode Q1 is connected with the emitter of a triode Q2, the base of a triode Q2 is connected with the collector of a triode Q4 through a resistor R9, the base of a triode Q4 is connected with the collector of a triode Q5 through a resistor R10, the emitter of the triode Q4 is grounded, the base of a triode Q5 is grounded after being connected in series through a resistor R11 and a resistor R13, the common connection point between the resistor R11 and a resistor R13 is connected with a power supply VCC1 through a resistor R12, and the emitter of a triode Q5 is connected with the common connection point between the resistor R3 and a resistor R19; the collector of the triode Q2 is grounded through a resistor R8, the collector of the triode Q2 is connected to the control end of the static switch Q3 through a resistor R7, and the collector of the triode Q2 is connected to the first control input end of the relay control circuit and the detection input end of the control unit as the control end of the mains supply self-detection control circuit.
Further, the input filter circuit comprises a resistor R1, a resistor R2 and a capacitor C1;
one end of the resistor R1 is used as the input end of the input filter circuit, the other end of the resistor R1 is grounded through the resistor R2, and the common connection point of the resistor R1 and the resistor R2 is used as the output end of the input filter circuit;
the common connection point of the resistor R1 and the resistor R2 is grounded via a capacitor C1.
Further, the relay control circuit comprises a direct current conversion circuit DC-DC II, a resistor R14, a resistor R15, a resistor R16, a resistor R17, a resistor R18, a triode Q7, a triode Q8 and a PMOS tube Q6;
the input end of a direct current conversion circuit DC-DC II is connected with a storage battery, the output end of the direct current conversion circuit DC-DC II is connected with the source electrode of a PMOS pipe Q6, the source electrode of a PMOS pipe Q6 is connected with the grid electrode of a PMOS pipe Q6 through a resistor R15, the grid electrode of a PMOS pipe Q6 is connected with the collector electrode of a triode Q8, the emitter electrode of a triode Q8 is grounded through a resistor R16, the base electrode of a triode Q8 is connected with the collector electrode of a triode Q7, the emitter electrode of a triode Q7 is connected with the source electrode of a PMOS pipe Q6 through a resistor R14, the base electrodes of a triode Q7 are respectively connected with the negative electrodes of a diode D2 and a diode D3, the positive electrode of the diode D3 is used as the first control input end of a relay control circuit and is connected with the commercial power, the positive electrode of a diode D2 is used as the second control input end of the relay control circuit and is connected with the control unit, the one end of a resistor R3927 and a drain electrode 18 respectively, the other end of the resistor R17 is grounded through an exciting coil J2 of the normally open relay, and the other end of the resistor R18 is grounded through an exciting coil J1 of the normally closed relay.
Further, the static switch Q3 is a triac.
The utility model has the beneficial effects that: according to the utility model, mains supply self-inspection is carried out at the initial power supply and in the power supply process of the power information acquisition terminal, and the power information acquisition terminal is timely switched into the load power supply loop when the mains supply is in overvoltage, undervoltage and power failure, so that the continuous and stable work of the acquisition terminal can be ensured, and the continuity and stability of data acquisition are further ensured.
Drawings
The utility model is further described below with reference to the following figures and examples:
FIG. 1 is a schematic structural diagram of the present invention.
Detailed Description
The utility model is described in further detail below with reference to the drawings of the specification:
the utility model provides a UPS (uninterrupted Power supply) power supply device of power acquisition equipment, which comprises a static switch Q3, a normally closed relay, a mains supply self-checking control circuit, a second rectification circuit REC2, a filter circuit FIL, a charging and discharging management circuit U2, a storage battery BAT, a normally open relay, an inverter DC/AC, a transformer T2, a control unit and a relay control circuit, wherein the normally closed relay is connected with the mains supply self-checking control circuit;
one end of a switch K1 of the normally closed relay is used as a mains supply input end, the other end of a switch K1 of the normally closed relay is connected with the input end of a static switch, and the output end of the static switch is used as a mains supply output end;
the mains supply self-checking circuit is used for detecting overvoltage, undervoltage and power-off states of mains supply and outputting control signals to the control end of the static switch and the control end of the relay control circuit, and the mains supply self-checking circuit also outputs state signals to the control unit;
the input end of the second rectifying circuit REC2 is connected to a common connection point between the switch K1 and the static switch, the output end of the second rectifying circuit is connected with the input end of the filter circuit FIL, the output end of the filter circuit FIL is connected with the input end of the charge and discharge management circuit U2, and the output end of the charge and discharge management circuit U2 is connected with the anode of the storage battery BAT through a diode D1;
the input end of the inverter DC/AC is connected with the anode of the storage battery BAT through a switch K2 of a normally open relay, the output end of the inverter DC/AC is connected with the input end of a transformer T2, the output end of the transformer T2 is connected with one end of a static switch Q3 serving as the output end, and the control unit outputs a control command to the inverter DC/AC and the relay control circuit; the control unit adopts the existing structure and comprises an inverter drive control circuit, a microcontroller, a feedback acquisition module and the like, wherein the feedback acquisition module is used for acquiring output voltage and current information of the transformer and controlling the inverter drive control circuit to output different PWM signals according to the output voltage and current information so as to control the working state of the inverter and ensure the stability of output; through above-mentioned structure, carry out the commercial power self-checking and in time cut into load power supply loop when commercial power is excessive pressure, undervoltage and outage at the power supply initiation, power supply in-process to electric power information acquisition terminal to ensure that acquisition terminal can last stable work, and then ensure data acquisition's continuity and stability, moreover, whole simple structure is reliable, and stability is high, low cost.
In this embodiment, the commercial power self-checking control circuit includes a transformer T1, a first rectification circuit REC1, an input filter circuit, an operational amplifier U1, a resistor R3, a resistor R19, a detection control circuit, and a direct current conversion circuit DC-DC i;
a primary winding of the transformer T1 is connected in series between a switch K1 and a static switch Q3 of a normally closed relay, one end of a secondary winding of the transformer T1 is connected to a positive input end of a first rectification circuit REC1, one end of a secondary winding of the transformer T1 is grounded, a positive output end of the first rectification circuit REC1 is connected with an input end of an input filter circuit, an output end of the input filter circuit is connected to a same-phase end of an operational amplifier U1, an opposite-phase end of the operational amplifier U1 is directly connected with an output end of an operational amplifier U1 to form a voltage follower, an output end of the operational amplifier U1 is connected with one end of a resistor R3, the other end of the resistor R3 is connected with one end of a resistor R19, and the other end of the resistor R19 is used as a second detection output end of a mains supply self-detection control circuit and is connected with an input end of a control unit;
the common connection point of the resistor R3 and the resistor R19 is connected with the input end of the detection control circuit, the input end of the direct current conversion circuit DC-DC I is connected with the common connection point of the resistor R3 and the resistor R19, and the output end of the direct current conversion circuit DC-DC I outputs direct current VCC1 and supplies power to the detection control circuit. In the process of power-on initialization and power supply on the mains supply, through the structure, overvoltage, undervoltage and power failure can be accurately detected and corresponding control commands are output, so that the working stability of the power acquisition terminal is ensured, and the structure is low in cost and high in stability.
Specifically, the method comprises the following steps: the detection control circuit comprises a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a resistor R10, a resistor R11, a resistor R12, a resistor R13, a triode Q1, a triode Q2, a triode Q3, a triode Q4 and a triode Q5;
the triode Q1, the triode Q2 and the triode Q5 are all P-type triodes;
the base electrode of the triode Q1 is connected to a common connection point between the resistor R3 and the resistor R19, the emitter electrode of the triode Q1 is grounded after being connected in series with the resistor R6 through the resistor R5, and the common connection point between the resistor R5 and the resistor R6 is connected to a power supply VCC1 through the resistor R4; the collector of a triode Q1 is connected with the emitter of a triode Q2, the base of a triode Q2 is connected with the collector of a triode Q4 through a resistor R9, the base of a triode Q4 is connected with the collector of a triode Q5 through a resistor R10, the emitter of the triode Q4 is grounded, the base of a triode Q5 is grounded after being connected in series through a resistor R11 and a resistor R13, the common connection point between the resistor R11 and a resistor R13 is connected with a power supply VCC1 through a resistor R12, and the emitter of a triode Q5 is connected with the common connection point between the resistor R3 and a resistor R19; the collector of a triode Q2 is grounded through a resistor R8, the collector of a triode Q2 is connected with the control end of a static switch Q3 through a resistor R7, the collector of a triode Q2 is used as the control end of a mains supply self-checking control circuit and is connected with the first control input end of a relay control circuit and the detection input end of a control unit, wherein, the resistor R4 and the resistor R6 form a reference voltage circuit, a reference voltage Vref1 is provided for the emitter of the triode Q1, when the base voltage of the triode Q1 is lower than the reference voltage Vref1, the triode Q1 is conducted to indicate that overvoltage does not occur, the resistor R11 and the resistor R13 form a reference voltage circuit to provide a reference voltage Vref2, when the current sampling voltage is higher than the reference voltage Vref2, the triode Q5 is conducted to indicate that undervoltage does not occur, when the triodes Q1 and Q5 are conducted simultaneously to indicate that the mains supply voltage is stable, the triode Q4 and the triode Q2 are both conducted, the high level is output at the collector of the triode Q2, if the power is initially powered on, the high level triggers the static switch Q3 to be turned on, the commercial power is supplied, if the power is supplied, the high level can provide a control signal for subsequent control for switching control, specifically, description is performed in a relay control circuit, and if any one of overvoltage, undervoltage or power failure occurs, the collector output of the triode Q2 is the low level.
In this embodiment, the input filter circuit includes a resistor R1, a resistor R2, and a capacitor C1;
one end of the resistor R1 is used as the input end of the input filter circuit, the other end of the resistor R1 is grounded through the resistor R2, and the common connection point of the resistor R1 and the resistor R2 is used as the output end of the input filter circuit;
the common connection point of the resistor R1 and the resistor R2 is grounded through the capacitor C1, and through the structure, the voltage limiting, the current limiting and the filtering effects can be achieved, so that the protection is provided for a subsequent circuit.
In this embodiment, the relay control circuit includes a DC-DC converter circuit DC-DC ii, a resistor R14, a resistor R15, a resistor R16, a resistor R17, a resistor R18, a transistor Q7, a transistor Q8, and a PMOS transistor Q6;
the input end of a direct current conversion circuit DC-DC II is connected with a storage battery, the output end of the direct current conversion circuit DC-DC II is connected with the source electrode of a PMOS pipe Q6, the source electrode of a PMOS pipe Q6 is connected with the grid electrode of a PMOS pipe Q6 through a resistor R15, the grid electrode of a PMOS pipe Q6 is connected with the collector electrode of a triode Q8, the emitter electrode of a triode Q8 is grounded through a resistor R16, the base electrode of a triode Q8 is connected with the collector electrode of a triode Q7, the emitter electrode of a triode Q7 is connected with the source electrode of a PMOS pipe Q6 through a resistor R14, the base electrodes of a triode Q7 are respectively connected with the negative electrodes of a diode D2 and a diode D3, the positive electrode of the diode D3 is used as the first control input end of a relay control circuit and is connected with the commercial power, the positive electrode of a diode D2 is used as the second control input end of the relay control circuit and is connected with the control unit, the one end of a resistor R3927 and a drain electrode 18 respectively, the other end of the resistor R17 is grounded through an excitation coil J2 of the normally open relay, and the other end of the resistor R18 is grounded through an excitation coil J1 of the normally closed relay; when DEC1 is high level, triode Q7 is cut off, PMOS pipe Q6 is cut off, at this time, normally closed relay keeps normally closed state, normally open relay keeps normally open state, the storage battery does not enter working state, if DEC1 outputs low level, microcontroller refers to detection signal of DEC2, if DEC2 is still high level, it shows that there is overvoltage or undervoltage situation, microcontroller sends out alarm of overvoltage or overcurrent, if DEC2 is also low level, it can be judged that this time is power off state, microcontroller sends out power off alarm, alarm can be realized by acousto-optic alarm, it can also be realized by sending to remote monitoring host, if it is still judged that overvoltage or undervoltage, two detection terminals can be set at collector of triode Q1 and base of triode Q4 to enter microcontroller, thereby overvoltage or undervoltage judgment is carried out, such as: no high at transistor Q1, a high at the base of transistor Q4, indicating a current overvoltage, and an undervoltage if high at the collector of transistor Q1 and low at the base of transistor Q4; when DEC1 is at a low level, a triode Q7 is connected, a PMOS (P-channel metal oxide semiconductor) tube Q6 is connected, at the moment, the storage battery enters a working state, namely a switch K2 of a normally-open relay J2 is closed, and a switch K1 of a normally-closed relay J1 is disconnected, so that the situation that potential safety hazards are caused by simultaneous superposition of two voltages (mains supply and the storage battery) is prevented, when the mains supply is recovered, a command is sent to a microcontroller, the microcontroller sends a high level to a base electrode of the triode Q7, so that the triode Q7 is cut off, the storage battery is further powered off, the mains supply is started, in order to ensure the power-off induced voltage of a coil of the relay, two P-type triodes Q9 and Q10 are further arranged, wherein a base electrode of the triode Q10 is connected to a drain electrode of the PMOS tube Q6, a collector electrode of a triode Q10 is grounded, and an emitter electrode of the triode Q10 is connected to a common connection point of an excitation coil 2 and a resistor R17 of the normally-open relay; the base electrode of the triode Q9 is connected with the drain electrode of the PMOS pipe Q6, the collector electrode of the triode Q9 is grounded, and the emitter electrode of the triode Q9 is connected with the common connection point of the excitation coil J1 and the resistor R18 of the normally closed relay.
In this embodiment, the static switch Q3 is a triac, and with this structure, the switching speed is fast, and is safe and reliable.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (6)
1. The utility model provides a power acquisition equipment UPS power supply unit which characterized in that: the intelligent control system comprises a static switch Q3, a normally closed relay, a mains supply self-checking control circuit, a second rectification circuit REC2, a filter circuit FIL, a charging and discharging management circuit U2, a storage battery BAT, a normally open relay, an inverter DC/AC, a transformer T2, a control unit and a relay control circuit;
one end of a switch K1 of the normally closed relay is used as a mains supply input end, the other end of a switch K1 of the normally closed relay is connected with the input end of a static switch, and the output end of the static switch is used as a mains supply output end;
the mains supply self-checking circuit is used for detecting overvoltage, undervoltage and power-off states of mains supply and outputting control signals to the control end of the static switch and the control end of the relay control circuit, and the mains supply self-checking circuit also outputs state signals to the control unit;
the input end of the second rectifying circuit REC2 is connected to a common connection point between the switch K1 and the static switch, the output end of the second rectifying circuit is connected with the input end of the filter circuit FIL, the output end of the filter circuit FIL is connected with the input end of the charge and discharge management circuit U2, and the output end of the charge and discharge management circuit U2 is connected with the anode of the storage battery BAT through a diode D1;
the input end of the inverter DC/AC is connected with the anode of the battery BAT through a switch K2 of a normally open relay, the output end of the inverter DC/AC is connected with the input end of a transformer T2, the output end of the transformer T2 is connected with one end of a static switch Q3 serving as the output end, and the control unit outputs a control command to the inverter DC/AC and relay control circuit.
2. The power harvesting device UPS of claim 1, wherein: the commercial power self-checking control circuit comprises a transformer T1, a first rectifying circuit REC1, an input filter circuit, an operational amplifier U1, a resistor R3, a resistor R19, a detection control circuit and a direct current conversion circuit DC-DC I;
a primary winding of the transformer T1 is connected in series between a switch K1 and a static switch Q3 of a normally closed relay, one end of a secondary winding of the transformer T1 is connected to a positive input end of a first rectification circuit REC1, one end of a secondary winding of the transformer T1 is grounded, a positive output end of the first rectification circuit REC1 is connected with an input end of an input filter circuit, an output end of the input filter circuit is connected to a same-phase end of an operational amplifier U1, an opposite-phase end of the operational amplifier U1 is directly connected with an output end of an operational amplifier U1 to form a voltage follower, an output end of the operational amplifier U1 is connected with one end of a resistor R3, the other end of the resistor R3 is connected with one end of a resistor R19, and the other end of the resistor R19 is used as a second detection output end of a mains supply self-detection control circuit and is connected with an input end of a control unit;
the common connection point of the resistor R3 and the resistor R19 is connected with the input end of the detection control circuit, the input end of the direct current conversion circuit DC-DC I is connected with the common connection point of the resistor R3 and the resistor R19, and the output end of the direct current conversion circuit DC-DC I outputs direct current VCC1 and supplies power to the detection control circuit.
3. The power harvesting device UPS power supply apparatus of claim 2, wherein: the detection control circuit comprises a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a resistor R10, a resistor R11, a resistor R12, a resistor R13, a triode Q1, a triode Q2, a triode Q3, a triode Q4 and a triode Q5;
the triode Q1, the triode Q2 and the triode Q5 are all P-type triodes;
the base electrode of the triode Q1 is connected to a common connection point between the resistor R3 and the resistor R19, the emitter electrode of the triode Q1 is grounded after being connected in series with the resistor R6 through the resistor R5, and the common connection point between the resistor R5 and the resistor R6 is connected to a power supply VCC1 through the resistor R4; the collector of a triode Q1 is connected with the emitter of a triode Q2, the base of a triode Q2 is connected with the collector of a triode Q4 through a resistor R9, the base of a triode Q4 is connected with the collector of a triode Q5 through a resistor R10, the emitter of the triode Q4 is grounded, the base of a triode Q5 is grounded after being connected in series through a resistor R11 and a resistor R13, the common connection point between the resistor R11 and a resistor R13 is connected with a power supply VCC1 through a resistor R12, and the emitter of a triode Q5 is connected with the common connection point between the resistor R3 and a resistor R19; the collector of the triode Q2 is grounded through a resistor R8, the collector of the triode Q2 is connected to the control end of the static switch Q3 through a resistor R7, and the collector of the triode Q2 is connected to the first control input end of the relay control circuit and the detection input end of the control unit as the control end of the mains supply self-detection control circuit.
4. The power harvesting device UPS power supply apparatus of claim 2, wherein: the input filter circuit comprises a resistor R1, a resistor R2 and a capacitor C1;
one end of the resistor R1 is used as the input end of the input filter circuit, the other end of the resistor R1 is grounded through the resistor R2, and the common connection point of the resistor R1 and the resistor R2 is used as the output end of the input filter circuit;
the common connection point of the resistor R1 and the resistor R2 is grounded via a capacitor C1.
5. The power harvesting device UPS of claim 1, wherein: the relay control circuit comprises a direct current conversion circuit DC-DC II, a resistor R14, a resistor R15, a resistor R16, a resistor R17, a resistor R18, a triode Q7, a triode Q8 and a PMOS tube Q6;
the input end of a direct current conversion circuit DC-DC II is connected with a storage battery, the output end of the direct current conversion circuit DC-DC II is connected with the source electrode of a PMOS pipe Q6, the source electrode of a PMOS pipe Q6 is connected with the grid electrode of a PMOS pipe Q6 through a resistor R15, the grid electrode of a PMOS pipe Q6 is connected with the collector electrode of a triode Q8, the emitter electrode of a triode Q8 is grounded through a resistor R16, the base electrode of a triode Q8 is connected with the collector electrode of a triode Q7, the emitter electrode of a triode Q7 is connected with the source electrode of a PMOS pipe Q6 through a resistor R14, the base electrodes of a triode Q7 are respectively connected with the negative electrodes of a diode D2 and a diode D3, the positive electrode of the diode D3 is used as a first control input end of a relay control circuit and is connected with the commercial power, the positive electrode of a diode D2 is used as a second control input end of the relay control circuit and is connected with a control unit, the drain electrode of a resistor R3927 and a resistor R18 respectively, the other end of the resistor R17 is grounded through an exciting coil J2 of the normally open relay, and the other end of the resistor R18 is grounded through an exciting coil J1 of the normally closed relay.
6. The power harvesting device UPS of claim 1, wherein: the static switch Q3 is a triac.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122390344.6U CN215911940U (en) | 2021-09-29 | 2021-09-29 | UPS power supply device of power acquisition equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122390344.6U CN215911940U (en) | 2021-09-29 | 2021-09-29 | UPS power supply device of power acquisition equipment |
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| CN215911940U true CN215911940U (en) | 2022-02-25 |
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| CN202122390344.6U Active CN215911940U (en) | 2021-09-29 | 2021-09-29 | UPS power supply device of power acquisition equipment |
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