CN214069659U - DC UPS power supply - Google Patents
DC UPS power supply Download PDFInfo
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- CN214069659U CN214069659U CN202023314019.3U CN202023314019U CN214069659U CN 214069659 U CN214069659 U CN 214069659U CN 202023314019 U CN202023314019 U CN 202023314019U CN 214069659 U CN214069659 U CN 214069659U
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Abstract
In the direct current UPS power supply provided by the utility model, the anode of the storage battery is connected with the input end of the storage battery power supply control circuit, the output end of the storage battery power supply control circuit is connected with the input end of the inverter INV, the output end of the inverter INV is connected with the input end of the rectifier circuit REC, and the output end of the rectifier circuit REC supplies power to the load; the detection input end of the controller CPU is connected with the detection output end of the storage battery power supply control circuit, the control input end of the inverter drive circuit DRI at the control output end of the controller CPU is connected, and the control output end of the inverter drive circuit is connected with the control end of the inverter INV; the input of main supply circuit connects in DC power supply VCC, and main supply circuit's output supplies power to the load, and battery power supply control circuit's control input connects in main supply circuit's outage detection end, and whole switching process is reliable and stable, need not chip control, reduces use cost.
Description
Technical Field
The utility model relates to a power especially relates to a direct current UPS power.
Background
In the power supply of the direct current device, a UPS power supply is generally adopted, so that the direct current device can obtain continuous and stable working voltage, the existing direct current UPS power supply has poor stability of switching control between a main power supply loop and a redundant power supply, and an additional control chip is needed when the redundant power supply and the main power supply loop are switched, so that the circuit cost is increased.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing a direct current UPS power can automatic switch to the battery power supply when main supply circuit has the outage trouble, can automatic switch to main power supply loop power supply when main supply circuit resumes the power supply, and whole switching process is reliable and stable, need not chip control, reduces use cost.
The utility model provides a direct current UPS power supply, including battery, battery power supply control circuit, dc-to-ac converter INV, rectifier circuit REC, filter circuit FIL, controller CPU, inverter drive circuit DRI and main power supply circuit;
the positive electrode of the storage battery is connected to the input end of the storage battery power supply control circuit, the output end of the storage battery power supply control circuit is connected with the input end of the inverter INV, the output end of the inverter INV is connected with the input end of the rectifier circuit REC, and the output end of the rectifier circuit REC supplies power to the load;
the detection input end of the controller CPU is connected with the detection output end of the storage battery power supply control circuit, the control input end of the inverter drive circuit DRI at the control output end of the controller CPU is connected, and the control output end of the inverter drive circuit is connected with the control end of the inverter INV;
the input end of the main power supply circuit is connected to a direct-current power supply VCC, the output end of the main power supply circuit supplies power to a load, and the control input end of the storage battery power supply control circuit is connected to the power-off detection end of the main power supply circuit.
The power supply system further comprises a voltage stabilizing circuit, wherein the input end of the voltage stabilizing circuit is connected to the anode of the storage battery through a resistor R3, and the output end of the voltage stabilizing circuit supplies power to the power supply end of the CPU of the controller and the power supply end of the inverter driving circuit.
The charging and discharging management circuit is used for managing charging and discharging of the storage battery.
Further, the main power supply circuit comprises a resistor R13, a PMOS tube Q3, a diode D3 and a main power supply control circuit;
the main power supply control circuit comprises an overvoltage detection circuit and an MOS (metal oxide semiconductor) tube control circuit;
one end of the resistor R13 is used as an input end of the switch circuit, the other end of the resistor R13 is connected to the source electrode of the PMOS tube Q3, the drain electrode of the PMOS tube Q3 is connected to the anode of the diode D3, the cathode of the diode D3 is used as an output end of the switch circuit, and the anode of the diode D3 is used as a power-off detection end of the main power supply circuit;
the overvoltage detection circuit is used for detecting the input voltage of the switch circuit and inputting a low-level control signal to the control input end of the PMOS tube control circuit by the control output end of the overvoltage detection circuit when the overvoltage detection circuit is in overvoltage;
the control output end of the MOS transistor control circuit is connected to the gate of the PMOS transistor Q3, and is used for controlling the on and off of the PMOS transistor Q3.
Further, the overvoltage detection circuit comprises a resistor R4, a resistor R5, a capacitor C3, a capacitor C6, a voltage regulator tube D1 and a voltage regulator tube D2;
one end of a resistor R4 is connected to the output end of the direct-current power supply, the other end of the resistor R4 is grounded through a resistor R5, a common connection point between the resistor R4 and the output end of the direct-current power supply is grounded through a capacitor C3, a common connection point between the resistor R4 and the resistor R5 is connected with the negative electrode of a voltage regulator tube D1, the positive electrode of the voltage regulator tube D1 is connected with the positive electrode of a voltage regulator tube D2, the negative electrode of the voltage regulator tube D2 serves as the control output end of the overvoltage detection circuit, and the positive electrode of the voltage regulator tube D1 is grounded through a capacitor C6.
Further, the MOS transistor control circuit includes a resistor R6, a resistor R7, a resistor R8, a resistor R9, a resistor R10, a transistor Q5, a transistor Q4, and a capacitor C4;
one end of the resistor R9 is connected to the source of the PMOS tube Q3, the other end of the resistor R9 is connected in parallel with the capacitor C4 through the resistor R10 and then grounded, the common connection point of the resistor R9 and the resistor R10 is connected to the base of the triode Q5 through the resistor R6, the emitter of the triode Q5 is grounded, the collector of the triode Q5 is connected in series with the resistor R7 and the resistor R8 and then connected to the source of the PMOS tube Q3, the common connection point of the resistor R7 and the resistor R8 serves as the control output end of the MOS tube control circuit, the collector of the triode Q4 is connected to the common connection point of the resistor R9 and the resistor R10, the emitter of the triode Q4 is grounded, and the base of the triode Q4 serves as the control input end of the MOS tube control circuit.
Further, the storage battery power supply control circuit comprises a PMOS tube Q1, a resistor R1, a resistor R2, a resistor R11, a resistor R12, a resistor R14, a triode Q2, a triode Q6, a capacitor C1, a capacitor C7 and a capacitor C2;
the source electrode of the PMOS tube Q1 is grounded through a capacitor C1, the common connection point between the source electrode of the PMOS tube Q1 and the capacitor C1 is used as the input end of the storage battery power supply control circuit and is connected to the anode of the storage battery, the drain electrode of the PMOS tube Q1 is grounded through a capacitor C7, and the common connection point between the capacitor C7 and the drain electrode of the PMOS tube Q1 is used as the output end of the storage battery power supply control circuit and is connected to the input end of the inverter INV;
an emitter electrode of the triode Q6 is used as a control input end of the storage battery power supply control circuit and is connected to a power-off detection end of the main power supply circuit, a collector electrode of the triode Q6 is connected to a base electrode of the triode Q2 through a resistor R14, the base electrode of the triode Q6 is connected to an emitter electrode of the triode Q6 through a resistor R12, the base electrode of the triode Q6 is grounded through a resistor R11, and a common connection point between a resistor R11 and the resistor R12 is used as a detection output end of the storage battery power supply control circuit;
the collector of the triode Q2 is grounded, the emitter of the triode Q2 is connected in series with the resistor R1 through the resistor R2 and the resistor R1 and then connected to the source of the PMOS tube Q1, the common connection point between the resistor R1 and the resistor R2 is grounded through the capacitor C2, and the common connection point between the resistor R1 and the resistor R2 is connected to the gate of the PMOS tube Q1.
The utility model has the advantages that: through the utility model discloses, can the automatic switch to the battery power supply when main supply circuit has the outage trouble, can the automatic switch to main supply circuit power supply when main supply circuit resumes the power supply, whole switching process is reliable and stable, need not chip control, reduces use cost.
Drawings
The invention will be further described with reference to the following figures and examples:
fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic circuit diagram of the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings of the specification:
the utility model provides a direct current UPS power supply, including battery, battery power supply control circuit, dc-to-ac converter INV, rectifier circuit REC, filter circuit FIL, controller CPU, inverter drive circuit DRI and main power supply circuit;
the positive electrode of the storage battery is connected to the input end of the storage battery power supply control circuit, the output end of the storage battery power supply control circuit is connected with the input end of the inverter INV, the output end of the inverter INV is connected with the input end of the rectifier circuit REC, and the output end of the rectifier circuit REC supplies power to the load;
the detection input end of the controller CPU is connected with the detection output end of the storage battery power supply control circuit, the control input end of the inverter drive circuit DRI at the control output end of the controller CPU is connected, and the control output end of the inverter drive circuit is connected with the control end of the inverter INV;
the input end of the main power supply circuit is connected to a direct-current power supply VCC, the output end of the main power supply circuit supplies power to a load, the control input end of the storage battery power supply control circuit is connected to the power failure detection end of the main power supply circuit, the inverter INV, the rectifier circuit REC, the filter circuit FIL and the inverter drive circuit DRI are all realized by adopting the existing circuits, and the controller CPU adopts the existing single chip microcomputer; through the structure, the power supply of the storage battery can be automatically switched to when the main power supply circuit has power failure, and the power supply of the main power supply circuit can be automatically switched to the power supply of the main power supply circuit when the main power supply circuit recovers power supply, so that the whole switching process is stable and reliable, chip control is not needed, and the use cost is reduced.
In this embodiment, the battery power supply further includes a voltage regulator circuit U1, an input end of the voltage regulator circuit U1 is connected to the positive electrode of the battery through a resistor R3, an output end of the voltage regulator circuit U1 supplies power to a power supply end of the controller CPU and a power supply end of the inverter driving circuit, and the voltage regulator circuit is implemented by using an existing circuit, such as LM7809, LM7805, and the like, and is selected according to a rated voltage of an actual device.
In this embodiment, the battery management circuit is further included, the battery management circuit is configured to manage charging and discharging of the battery, the battery management circuit uses an existing circuit, for example, a CN3763 battery management chip, and is configured to manage and control charging and discharging of the battery, and the battery uses an existing lithium battery.
In this embodiment, the main power supply circuit includes a resistor R13, a PMOS transistor Q3, a diode D3, and a main power supply control circuit;
the main power supply control circuit comprises an overvoltage detection circuit and an MOS (metal oxide semiconductor) tube control circuit;
one end of the resistor R13 is used as an input end of the switch circuit, the other end of the resistor R13 is connected to the source electrode of the PMOS tube Q3, the drain electrode of the PMOS tube Q3 is connected to the anode of the diode D3, the cathode of the diode D3 is used as an output end of the switch circuit, and the anode of the diode D3 is used as a power-off detection end of the main power supply circuit;
the overvoltage detection circuit is used for detecting the input voltage of the switch circuit and inputting a low-level control signal to the control input end of the PMOS tube control circuit by the control output end of the overvoltage detection circuit when the overvoltage detection circuit is in overvoltage;
the control output end of the MOS transistor control circuit is connected to the gate of the PMOS transistor Q3, and is used for controlling the on and off of the PMOS transistor Q3.
The overvoltage detection circuit comprises a resistor R4, a resistor R5, a capacitor C3, a capacitor C6, a voltage regulator tube D1 and a voltage regulator tube D2;
one end of a resistor R4 is connected to the output end of the direct-current power supply, the other end of the resistor R4 is grounded through a resistor R5, a common connection point between the resistor R4 and the output end of the direct-current power supply is grounded through a capacitor C3, a common connection point between the resistor R4 and the resistor R5 is connected with the negative electrode of a voltage regulator tube D1, the positive electrode of the voltage regulator tube D1 is connected with the positive electrode of a voltage regulator tube D2, the negative electrode of the voltage regulator tube D2 serves as the control output end of the overvoltage detection circuit, and the positive electrode of the voltage regulator tube D1 is grounded through a capacitor C6.
The MOS tube control circuit comprises a resistor R6, a resistor R7, a resistor R8, a resistor R9, a resistor R10, a triode Q5, a triode Q4 and a capacitor C4;
one end of the resistor R9 is connected to the source of the PMOS tube Q3, the other end of the resistor R9 is connected in parallel with the capacitor C4 through the resistor R10 and then grounded, the common connection point of the resistor R9 and the resistor R10 is connected to the base of the triode Q5 through the resistor R6, the emitter of the triode Q5 is grounded, the collector of the triode Q5 is connected in series with the resistor R7 and the resistor R8 and then connected to the source of the PMOS tube Q3, the common connection point of the resistor R7 and the resistor R8 serves as the control output end of the MOS tube control circuit, the collector of the triode Q4 is connected to the common connection point of the resistor R9 and the resistor R10, the emitter of the triode Q4 is grounded, and the base of the triode Q4 serves as the control input end of the MOS tube control circuit.
The storage battery power supply control circuit comprises a PMOS (P-channel metal oxide semiconductor) transistor Q1, a resistor R1, a resistor R2, a resistor R11, a resistor R12, a resistor R14, a triode Q2, a triode Q6, a capacitor C1, a capacitor C7 and a capacitor C2;
the source electrode of the PMOS tube Q1 is grounded through a capacitor C1, the common connection point between the source electrode of the PMOS tube Q1 and the capacitor C1 is used as the input end of the storage battery power supply control circuit and is connected to the anode of the storage battery, the drain electrode of the PMOS tube Q1 is grounded through a capacitor C7, and the common connection point between the capacitor C7 and the drain electrode of the PMOS tube Q1 is used as the output end of the storage battery power supply control circuit and is connected to the input end of the inverter INV;
an emitter electrode of the triode Q6 is used as a control input end of the storage battery power supply control circuit and is connected to a power-off detection end of the main power supply circuit, a collector electrode of the triode Q6 is connected to a base electrode of the triode Q2 through a resistor R14, the base electrode of the triode Q6 is connected to an emitter electrode of the triode Q6 through a resistor R12, the base electrode of the triode Q6 is grounded through a resistor R11, and a common connection point between a resistor R11 and the resistor R12 is used as a detection output end of the storage battery power supply control circuit;
the collector of the triode Q2 is grounded, the emitter of the triode Q2 is connected in series with the resistor R1 through the resistor R2 and the resistor R1 and then connected to the source of the PMOS tube Q1, the common connection point between the resistor R1 and the resistor R2 is grounded through the capacitor C2, and the common connection point between the resistor R1 and the resistor R2 is connected to the gate of the PMOS tube Q1.
When the main power supply circuit is normal, the base electrode of the triode Q5 is subjected to voltage division power supply through the resistor R9 and the resistor R10, the triode Q5 is conducted, the PMOS tube Q3 is conducted, the main power supply circuit supplies power, meanwhile, the PMOS tube Q3 has output, the triode Q6 is conducted, the triode Q2 is cut off, the PMOS tube Q1 is cut off, a redundant power supply formed by the storage battery, the inverter and other devices does not supply power, at the moment, the resistor R11 and the resistor R12 output a high level to the controller CPU, and the controller CPU recognizes the high level and controls the inverter driving circuit DRI to be out of work;
when the main power supply circuit is interrupted, such as overvoltage protection is executed, the PMOS transistor Q3 is damaged, and the like; at the moment, the triode Q6 is cut off, so that the triode Q2 is conducted, the grid voltage of the PMOS pipe Q1 is pulled down, the PMOS pipe Q1 is conducted, the storage battery supplies power, meanwhile, the common connection point of the resistor R11 and the resistor R12 outputs low level to the controller CPU, the controller CPU controls the inverter driving circuit DRI to enter a working state, the inverter INV works, direct current output by the storage battery is converted into alternating current, the alternating current is provided to a load after rectification and filtering, and in order to improve load capacity, a transformer can be arranged between the inverter INV and the rectifying circuit, so that a larger voltage regulation range is achieved.
When the main power supply circuit recovers output, the transistor Q6 is turned on again, and the transistor Q2 and the PMOS transistor Q1 are turned off, so that the power supply is switched automatically without additional control signals or control circuit intervention.
In fig. 1, thick line arrows indicate the flow of control signals, and thin line arrows indicate the flow of current; the arrowed connecting lines in fig. 2 represent control signals.
Finally, 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 the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.
Claims (7)
1. A direct current UPS power supply characterized in that: the system comprises a storage battery, a storage battery power supply control circuit, an inverter INV, a rectification circuit REC, a filter circuit FIL, a controller CPU, an inverter drive circuit DRI and a main power supply circuit;
the positive electrode of the storage battery is connected to the input end of the storage battery power supply control circuit, the output end of the storage battery power supply control circuit is connected with the input end of the inverter INV, the output end of the inverter INV is connected with the input end of the rectifier circuit REC, and the output end of the rectifier circuit REC supplies power to the load;
the detection input end of the controller CPU is connected with the detection output end of the storage battery power supply control circuit, the control input end of the inverter drive circuit DRI at the control output end of the controller CPU is connected, and the control output end of the inverter drive circuit is connected with the control end of the inverter INV;
the input end of the main power supply circuit is connected to a direct-current power supply VCC, the output end of the main power supply circuit supplies power to a load, and the control input end of the storage battery power supply control circuit is connected to the power-off detection end of the main power supply circuit.
2. A dc UPS power supply as in claim 1 wherein: the input end of the voltage stabilizing circuit is connected to the anode of the storage battery through a resistor R3, and the output end of the voltage stabilizing circuit supplies power to the power supply end of the CPU of the controller and the power supply end of the inverter driving circuit.
3. A dc UPS power supply as in claim 1 wherein: the charging and discharging management system further comprises a storage battery management circuit, and the storage battery management circuit is used for managing charging and discharging of the storage battery.
4. A dc UPS power supply as in claim 1 wherein: the main power supply circuit comprises a resistor R13, a PMOS tube Q3, a diode D3 and a main power supply control circuit;
the main power supply control circuit comprises an overvoltage detection circuit and an MOS (metal oxide semiconductor) tube control circuit;
one end of the resistor R13 is used as an input end of the switch circuit, the other end of the resistor R13 is connected to the source electrode of the PMOS tube Q3, the drain electrode of the PMOS tube Q3 is connected to the anode of the diode D3, the cathode of the diode D3 is used as an output end of the switch circuit, and the anode of the diode D3 is used as a power-off detection end of the main power supply circuit;
the overvoltage detection circuit is used for detecting the input voltage of the switch circuit and inputting a low-level control signal to the control input end of the PMOS tube control circuit by the control output end of the overvoltage detection circuit when the overvoltage detection circuit is in overvoltage;
the control output end of the MOS transistor control circuit is connected to the gate of the PMOS transistor Q3, and is used for controlling the on and off of the PMOS transistor Q3.
5. A DC UPS according to claim 4, wherein: the overvoltage detection circuit comprises a resistor R4, a resistor R5, a capacitor C3, a capacitor C6, a voltage regulator tube D1 and a voltage regulator tube D2;
one end of a resistor R4 is connected to the output end of the direct-current power supply, the other end of the resistor R4 is grounded through a resistor R5, a common connection point between the resistor R4 and the output end of the direct-current power supply is grounded through a capacitor C3, a common connection point between the resistor R4 and the resistor R5 is connected with the negative electrode of a voltage regulator tube D1, the positive electrode of the voltage regulator tube D1 is connected with the positive electrode of a voltage regulator tube D2, the negative electrode of the voltage regulator tube D2 serves as the control output end of the overvoltage detection circuit, and the positive electrode of the voltage regulator tube D1 is grounded through a capacitor C6.
6. A DC UPS according to claim 4, wherein: the MOS tube control circuit comprises a resistor R6, a resistor R7, a resistor R8, a resistor R9, a resistor R10, a triode Q5, a triode Q4 and a capacitor C4;
one end of the resistor R9 is connected to the source of the PMOS tube Q3, the other end of the resistor R9 is connected in parallel with the capacitor C4 through the resistor R10 and then grounded, the common connection point of the resistor R9 and the resistor R10 is connected to the base of the triode Q5 through the resistor R6, the emitter of the triode Q5 is grounded, the collector of the triode Q5 is connected in series with the resistor R7 and the resistor R8 and then connected to the source of the PMOS tube Q3, the common connection point of the resistor R7 and the resistor R8 serves as the control output end of the MOS tube control circuit, the collector of the triode Q4 is connected to the common connection point of the resistor R9 and the resistor R10, the emitter of the triode Q4 is grounded, and the base of the triode Q4 serves as the control input end of the MOS tube control circuit.
7. A dc UPS power supply as in claim 1 wherein: the storage battery power supply control circuit comprises a PMOS (P-channel metal oxide semiconductor) transistor Q1, a resistor R1, a resistor R2, a resistor R11, a resistor R12, a resistor R14, a triode Q2, a triode Q6, a capacitor C1, a capacitor C7 and a capacitor C2;
the source electrode of the PMOS tube Q1 is grounded through a capacitor C1, the common connection point between the source electrode of the PMOS tube Q1 and the capacitor C1 is used as the input end of the storage battery power supply control circuit and is connected to the anode of the storage battery, the drain electrode of the PMOS tube Q1 is grounded through a capacitor C7, and the common connection point between the capacitor C7 and the drain electrode of the PMOS tube Q1 is used as the output end of the storage battery power supply control circuit and is connected to the input end of the inverter INV;
an emitter electrode of the triode Q6 is used as a control input end of the storage battery power supply control circuit and is connected to a power-off detection end of the main power supply circuit, a collector electrode of the triode Q6 is connected to a base electrode of the triode Q2 through a resistor R14, the base electrode of the triode Q6 is connected to an emitter electrode of the triode Q6 through a resistor R12, the base electrode of the triode Q6 is grounded through a resistor R11, and a common connection point between a resistor R11 and the resistor R12 is used as a detection output end of the storage battery power supply control circuit;
the collector of the triode Q2 is grounded, the emitter of the triode Q2 is connected in series with the resistor R1 through the resistor R2 and the resistor R1 and then connected to the source of the PMOS tube Q1, the common connection point between the resistor R1 and the resistor R2 is grounded through the capacitor C2, and the common connection point between the resistor R1 and the resistor R2 is connected to the gate of the PMOS tube Q1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023314019.3U CN214069659U (en) | 2020-12-31 | 2020-12-31 | DC UPS power supply |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023314019.3U CN214069659U (en) | 2020-12-31 | 2020-12-31 | DC UPS power supply |
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| CN214069659U true CN214069659U (en) | 2021-08-27 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114069825A (en) * | 2021-10-28 | 2022-02-18 | 国家电网有限公司 | Multi-output power direct current system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114069825A (en) * | 2021-10-28 | 2022-02-18 | 国家电网有限公司 | Multi-output power direct current system |
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