CN116436143A - UPS power supply - Google Patents
UPS power supply Download PDFInfo
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- CN116436143A CN116436143A CN202310446359.0A CN202310446359A CN116436143A CN 116436143 A CN116436143 A CN 116436143A CN 202310446359 A CN202310446359 A CN 202310446359A CN 116436143 A CN116436143 A CN 116436143A
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- 239000003990 capacitor Substances 0.000 claims description 6
- 230000000087 stabilizing effect Effects 0.000 claims description 6
- 238000007599 discharging Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 4
- 230000007812 deficiency Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/068—Electronic means for switching from one power supply to another power supply, e.g. to avoid parallel connection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention provides a UPS power supply, which comprises a main circuit power supply circuit, a bypass power supply circuit and a cut-off circuit; the main circuit power supply circuit is arranged between the alternating current input power supply and the load; the input end of the bypass power supply circuit is connected with an alternating current input power supply; the output end of the bypass power supply circuit is connected with the cut-off circuit; the cut-off circuit is connected with a load; the cut-off circuit is used for cutting off when the main circuit power supply circuit works, so that the battery pack in the bypass power supply circuit does not supply power to the load. Through setting up the cut-off circuit, make the bypass be in the cut-off state all the time at main road power supply circuit during operation, avoid the group battery to last discharging to the outside, can charge the battery to full electric voltage, effectively improve battery utilization ratio.
Description
Technical Field
The invention belongs to the technical field of power electronics, and particularly relates to a UPS.
Background
UPS power supplies are typically provided with a main circuit and a bypass circuit, and when the main circuit fails, the load will be powered by the battery pack in the bypass circuit until the main circuit resumes operation.
In the prior art, the rated output voltage of the battery pack in the bypass is generally equal to the output voltage of the main circuit. Because the full-charge voltage of the battery pack is larger than the rated output voltage of the battery pack, when the main circuit works, the battery in the bypass is in a charging state, and after the battery pack is charged to the rated output voltage, the battery pack continuously discharges outwards, the full-charge voltage cannot be reached, and the battery utilization rate is lower.
Disclosure of Invention
In view of the above, the present invention provides a UPS power source, which aims to solve the problem of low battery pack utilization of the UPS bypass in the prior art.
A first aspect of the invention provides a UPS power source comprising: a main circuit power supply circuit, a bypass power supply circuit and a cut-off circuit;
the main circuit power supply circuit is arranged between the alternating current input power supply and the load; the input end of the bypass power supply circuit is connected with an alternating current input power supply; the output end of the bypass power supply circuit is connected with the cut-off circuit; the cut-off circuit is connected with a load; the cut-off circuit is used for cutting off when the main circuit power supply circuit works, so that the battery pack in the bypass power supply circuit does not supply power to the load.
In one possible implementation, the cut-off circuit includes a buck circuit and a first diode;
the output voltage of the buck circuit is smaller than that of the main circuit power supply circuit; the input end of the first diode is connected with the output end of the buck circuit; the output end of the first diode is connected with a load.
In one possible implementation, the buck circuit includes: the first switch tube, the second diode, the first inductor, the first capacitor and the first resistor;
the grid electrode of the first switching tube is connected with the control end of the UPS; the source electrode of the first switching tube is connected with the positive electrode of the output end of the bypass power supply circuit; the drain electrode of the first switch tube is connected with the output end of the second diode; the input end of the second diode is connected with the negative electrode of the output end of the bypass power supply circuit;
the first end of the first inductor is connected with the drain electrode of the first switching tube; the second end of the first inductor is connected with the input end of the first diode; the output end of the first diode is connected with the positive electrode end of the load; the first capacitor and the first resistor are connected in parallel between the input terminal of the first diode and the negative terminal of the load.
In one possible implementation, the cut-off circuit includes a linear buck circuit and a first diode;
the output voltage of the linear voltage-reducing circuit is smaller than that of the main circuit power supply circuit; the input end of the first diode is connected with the output end of the linear voltage reduction circuit; the output end of the first diode is connected with a load.
In one possible implementation, the linear buck circuit includes: the second resistor, the third diode, the second switching tube and the voltage stabilizing tube;
the second resistor, the third resistor and the voltage stabilizing tube are connected in series and are connected in parallel between the positive electrode and the negative electrode of the output end of the bypass power supply circuit;
the grid electrode of the second switching tube is connected with the first node; the first node is a node between the second resistor and the third resistor; the source electrode of the second switching tube is connected with the positive electrode of the output end of the bypass power supply circuit; the drain electrode of the second switching tube is connected with the input end of the first diode; the output end of the first diode is connected with the positive electrode end of the load; the negative pole of the output end of the bypass power supply circuit is connected with the negative pole end of the load.
In one possible implementation, the cut-off circuit includes a gating circuit and a first diode; the gating circuit and the first diode are connected in series between the bypass supply circuit and the load.
In one possible implementation, the gating circuit includes a comparator and a third switching tube;
the comparator is used for outputting a high-level signal to the grid electrode of the third switching tube when the input voltage of the battery pack in the bypass power supply circuit is not smaller than the reference voltage;
the comparator is used for outputting a low-level signal to the grid electrode of the third switching tube when the input voltage of the battery pack in the bypass power supply circuit is smaller than the reference voltage;
the source electrode of the third switching tube is connected with the output end of the bypass power supply circuit; the drain electrode of the third switching tube is connected with the input end of the first diode; the output end of the first diode is connected with a load.
In one possible implementation, the gating circuit includes a comparator and a third switching tube;
the comparator is used for outputting a high-level signal to the grid electrode of the third switching tube when the output voltage of the main circuit power supply circuit is not smaller than the reference voltage;
the comparator is used for outputting a low-level signal to the grid electrode of the third switching tube when the output voltage of the main circuit power supply circuit is smaller than the reference voltage;
the source electrode of the third switching tube is connected with the output end of the bypass power supply circuit; the drain electrode of the third switching tube is connected with the input end of the first diode; the output end of the first diode is connected with a load.
In one possible implementation, the main circuit power supply circuit includes an AC/DC converter; the first end of the AC/DC converter is connected with an alternating current input power supply; the second end of the AC/DC converter is connected to a load.
In one possible implementation, the bypass power supply circuit includes a charger and a battery pack;
the first end of the charger is connected with an alternating current input power supply; the second end of the charger is connected with the first end of the battery pack; the second end of the battery pack is connected with the cut-off circuit.
The UPS power supply provided by the embodiment of the invention comprises a main circuit power supply circuit, a bypass power supply circuit and a cut-off circuit; the main circuit power supply circuit is arranged between the alternating current input power supply and the load; the input end of the bypass power supply circuit is connected with an alternating current input power supply; the output end of the bypass power supply circuit is connected with the cut-off circuit; the cut-off circuit is connected with a load; the cut-off circuit is used for cutting off when the main circuit power supply circuit works, so that the battery pack in the bypass power supply circuit does not supply power to the load. Through setting up the cut-off circuit, make the bypass be in the cut-off state all the time at main road power supply circuit during operation, avoid the group battery to last discharging to the outside, can charge the battery to full electric voltage, effectively improve battery utilization ratio.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a prior art UPS power supply;
FIG. 2 is a schematic diagram of another prior art UPS power supply;
FIG. 3 is a schematic diagram of a UPS power supply according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a buck circuit according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a structure of a linear step-down circuit according to an embodiment of the present invention.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth such as the particular system architecture, techniques, etc., in order to provide a thorough understanding of the embodiments of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
Fig. 1 is a schematic diagram of a UPS power source in the prior art. When the main circuit works, the battery in the bypass is in a charging state, after the battery is charged to rated output voltage, the battery pack is continuously discharged outwards, full-power voltage cannot be reached, and the battery utilization rate is low. The method can be specifically described by taking 24V electric equipment and a 24V battery pack as examples:
the rated input voltage of the electric equipment is 24V, and when the output voltage of the AC/DC converter is set to be 24V for ensuring the good operation of the electric equipment, the voltage of the battery pack can only be charged to about 24V at most. The full charge voltage of the selected 24V battery pack is about 28.8V, and the discharge cut-off voltage is 21V, so that the energy stored in the actual battery pack is equivalent to 35% of the maximum value when the battery pack voltage is charged to 24V, and the battery utilization rate is low.
According to the invention, by adding the BUCK circuit, the output voltage of the BUCK circuit can be set to be lower than 24V, when alternating current input exists, the BUCK circuit stops working, the battery cannot discharge outwards, and at the moment, the battery can be smoothly charged to a full-charge state of 28.8V, so that the utilization rate of the battery pack is greatly improved.
Fig. 2 is a schematic diagram of another prior art UPS power source. As shown in fig. 2, the addition of a DC/DC converter to a UPS power source can also achieve the same function as the present invention, but the DC/DC converter is complicated in structure and high in cost.
Fig. 3 is a schematic structural diagram of a UPS power source according to an embodiment of the present invention. As shown in fig. 3, in some embodiments, a UPS power source includes: a main circuit power supply circuit 11, a bypass power supply circuit 12 and a cut-off circuit 13.
The main circuit power supply circuit 11 is arranged between the alternating current input power supply and the load; the input end of the bypass power supply circuit 12 is connected with an alternating current input power supply; the output end of the bypass power supply circuit 12 is connected with the cut-off circuit 13; the cut-off circuit 13 is connected with a load; the cut-off circuit 13 is used to cut off the power supply of the bypass power supply circuit 12 when the main power supply circuit 11 is operated.
In the embodiment of the present invention, the cut-off circuit may be a step-down circuit or a gate circuit, which is not limited herein. In some embodiments, the main power supply circuit 11 includes an AC/DC converter; the first end of the AC/DC converter is connected with an alternating current input power supply; the second end of the AC/DC converter is connected to a load. The bypass power supply circuit 12 includes a charger and a battery pack; the first end of the charger is connected with an alternating current input power supply; the second end of the charger is connected with the first end of the battery pack; the second end of the battery pack is connected with the cut-off circuit.
In the embodiment of the invention, the bypass is always in the cut-off state when the main circuit power supply circuit 11 works by arranging the cut-off circuit, so that the battery pack is prevented from continuously discharging outwards, the battery can be charged to the full-charge voltage, and the battery utilization rate is effectively improved.
In some embodiments, the cut-off circuit includes a buck circuit and a first diode D1; the output voltage of the buck circuit is smaller than that of the main circuit power supply circuit 11; the input end of the first diode D1 is connected with the output end of the buck circuit; the output end of the first diode D1 is connected with a load.
In the embodiment of the invention, when alternating current is input, the alternating current is converted into stable direct current through the AC/DC converter to supply power for electric equipment. Meanwhile, the battery pack is charged by a charger. When the alternating current input is powered off, the AC/DC converter and the charger stop working, and the battery pack supplies power to the electric equipment through the BUCK circuit, so that the electric equipment is ensured not to be powered off. The BUCK circuit has the function of ensuring that the battery pack can be in a fully charged state, and if the BUCK circuit is not provided, the battery can always process the state of power deficiency, so that the utilization rate of the battery pack is reduced.
In the embodiment of the invention, when the AC/DC converter works, the output voltage of the AC/DC converter is larger than the output voltage of the buck circuit, and the first diode D1 for preventing reverse current is arranged, so that the buck circuit is cut off, the battery pack cannot output outwards, and the full-charge point voltage can be charged.
Fig. 4 is a schematic structural diagram of a buck circuit according to an embodiment of the present invention. As shown in fig. 4, in some embodiments, the buck circuit includes: the first switch tube Q1, the second diode D2, the first inductor L1, the first capacitor C1 and the first resistor R1; the grid electrode of the first switching tube Q1 is connected with the control end of the UPS; the source electrode of the first switching tube Q1 is connected with the positive electrode of the output end of the bypass power supply circuit 12; the drain electrode of the first switching tube Q1 is connected with the output end of the second diode D2; the input end of the second diode D2 is connected with the negative electrode of the output end of the bypass power supply circuit 12; the first end of the first inductor L1 is connected with the drain electrode of the first switching tube; the second end of the first inductor L1 is connected with the input end of the first diode D1; the output end of the first diode D1 is connected with the positive electrode end of the load; the first capacitor C1 and the first resistor R are connected in parallel between the input terminal of the first diode D1 and the negative terminal of the load.
The buck circuit shown in fig. 4 is only an example of the present invention, and any buck circuit with other structures in the prior art may be used as the cutoff circuit of the present invention, which is not limited herein.
In some embodiments, the cut-off circuit includes a linear buck circuit and a first diode D1; the output voltage of the linear step-down circuit is smaller than the output voltage of the main circuit power supply circuit 11; the input end of the first diode D1 is connected with the output end of the linear voltage reduction circuit; the output end of the first diode D1 is connected with a load.
In the embodiment of the invention, when the AC/DC converter works, the output voltage of the AC/DC converter is larger than that of the linear voltage reduction circuit, and the first diode D1 for preventing reverse flow is arranged, so that the linear voltage reduction circuit is cut off, the battery pack cannot output outwards, and the battery pack can be charged to the full-charge point voltage.
Fig. 5 is a schematic diagram of a structure of a linear step-down circuit according to an embodiment of the present invention. As shown in fig. 5, in some embodiments, the linear buck circuit includes: the second resistor R2, the third resistor R3, the third diode D3, the second switching tube Q2 and the voltage stabilizing tube Z1; the second resistor R2, the third resistor R3 and the voltage stabilizing tube Z1 which are connected in series are connected in parallel between the positive electrode and the negative electrode of the output end of the bypass power supply circuit 12; the grid electrode of the second switching tube Q2 is connected with the first node; the first node is a node between the second resistor R2 and the third resistor R3; the source electrode of the second switching tube Q2 is connected with the positive electrode of the output end of the bypass power supply circuit 12; the drain electrode of the second switching tube Q2 is connected with the input end of the first diode D1; the output end of the first diode D1 is connected with the positive electrode end of the load; the negative pole of the output of the bypass supply circuit 12 is connected to the negative pole of the load.
The linear step-down circuit shown in fig. 5 is only an example of the present invention, and any other structure of the linear step-down circuit in the prior art may be used as the cut-off circuit of the present invention, and is not limited herein.
In some embodiments, the cut-off circuit includes a gating circuit and a first diode D1; the gating circuit and the first diode D1 are connected in series between the bypass supply circuit 12 and the load.
In some embodiments, the gating circuit includes a comparator and a third switching tube; the comparator is used for outputting a high-level signal to the grid electrode of the third switching tube when the input voltage of the battery pack in the bypass power supply circuit 12 is not less than the reference voltage; the comparator is used for outputting a low-level signal to the grid electrode of the third switching tube when the input voltage of the battery pack in the bypass power supply circuit 12 is smaller than the reference voltage; the source electrode of the third switching tube is connected with the output end of the bypass power supply circuit 12; the drain electrode of the third switching tube is connected with the input end of the first diode D1; the output end of the first diode D1 is connected with a load.
In the embodiment of the invention, when the AC/DC converter works, the charger works simultaneously, the battery pack is in a charging state at the same time, and the charging voltage of the battery pack is acquired to be a value larger than the output voltage of the AC/DC converter, so that the output voltage of the AC/DC converter can be used as a reference voltage, and the reference voltage is compared with the charging voltage of the battery pack, thereby controlling the on and off of the third switching tube.
When the battery pack is charged, the third switching tube is turned on, the battery pack can output outwards, and when the battery pack is not charged, the third switching tube is turned off, and the battery pack cannot output outwards, so that the battery pack can be charged to the full-charge point voltage.
In some embodiments, the gating circuit includes a comparator and a third switching tube; the comparator is used for outputting a high-level signal to the grid electrode of the third switching tube when the output voltage of the main circuit power supply circuit 11 is not less than the reference voltage; the comparator is used for outputting a low-level signal to the grid electrode of the third switching tube when the output voltage of the main circuit power supply circuit 11 is smaller than the reference voltage; the source electrode of the third switching tube is connected with the output end of the bypass power supply circuit 12; the drain electrode of the third switching tube is connected with the input end of the first diode D1; the output end of the first diode D1 is connected with a load.
In the embodiment of the present invention, when the AC/DC converter works, the output voltage of the main power supply circuit 11 is collected to be equal to the rated voltage of the battery pack, a value slightly smaller than the rated voltage (for example, 0.95 times of the rated voltage) is used as the reference voltage, and the reference voltage is compared with the output voltage of the main power supply circuit 11, so that the third switching tube is controlled to be turned on and off.
When the AC/DC converter does not work, the third switching tube is turned on, the battery pack can output outwards, and when the AC/DC converter works, the third switching tube is turned off, and the battery pack cannot output outwards, so that the battery pack can be charged to the full-power point voltage.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and in part, not described or illustrated in any particular embodiment, reference is made to the related descriptions of other embodiments.
The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention, and are intended to be included in the scope of the present invention.
Claims (10)
1. A UPS power source, comprising: a main circuit power supply circuit, a bypass power supply circuit and a cut-off circuit;
the main circuit power supply circuit is arranged between the alternating current input power supply and the load; the input end of the bypass power supply circuit is connected with an alternating current input power supply; the output end of the bypass power supply circuit is connected with the cut-off circuit; the cut-off circuit is connected with a load; the cut-off circuit is used for cutting off when the main circuit power supply circuit works, so that the battery pack in the bypass power supply circuit does not supply power to the load.
2. The UPS power source of claim 1 wherein the cut-off circuit includes a buck circuit and a first diode;
the output voltage of the buck circuit is smaller than that of the main circuit power supply circuit; the input end of the first diode is connected with the output end of the buck circuit; the output end of the first diode is connected with a load.
3. The UPS power source of claim 2, wherein the buck circuit includes: the first switch tube, the second diode, the first inductor, the first capacitor and the first resistor;
the grid electrode of the first switching tube is connected with the control end of the UPS; the source electrode of the first switching tube is connected with the positive electrode of the output end of the bypass power supply circuit; the drain electrode of the first switching tube is connected with the output end of the second diode; the input end of the second diode is connected with the negative electrode of the output end of the bypass power supply circuit;
the first end of the first inductor is connected with the drain electrode of the first switching tube; the second end of the first inductor is connected with the input end of the first diode; the output end of the first diode is connected with the positive electrode end of the load; the first capacitor and the first resistor are connected in parallel between the input end of the first diode and the negative electrode end of the load.
4. The UPS power supply of claim 1 wherein the cut-off circuit includes a linear buck circuit and a first diode;
the output voltage of the linear voltage reduction circuit is smaller than that of the main circuit power supply circuit; the input end of the first diode is connected with the output end of the linear voltage reduction circuit; the output end of the first diode is connected with a load.
5. The UPS power source of claim 4 wherein the linear buck circuit includes: the second resistor, the third diode, the second switching tube and the voltage stabilizing tube;
the second resistor, the third resistor and the voltage stabilizing tube are connected in series and are connected in parallel between the positive electrode and the negative electrode of the output end of the bypass power supply circuit;
the grid electrode of the second switching tube is connected with the first node; the first node is a node between the second resistor and the third resistor; the source electrode of the second switching tube is connected with the positive electrode of the output end of the bypass power supply circuit; the drain electrode of the second switching tube is connected with the input end of the first diode; the output end of the first diode is connected with the positive electrode end of the load; and the negative electrode of the output end of the bypass power supply circuit is connected with the negative electrode end of the load.
6. The UPS power source of claim 1 wherein the cut-off circuit includes a gating circuit and a first diode; the gating circuit and the first diode are connected in series between the bypass supply circuit and the load.
7. The UPS power source of claim 6 wherein the gating circuit includes a comparator and a third switching tube;
the comparator is used for outputting a high-level signal to the grid electrode of the third switching tube when the input voltage of the battery pack in the bypass power supply circuit is not smaller than the reference voltage;
the comparator is used for outputting a low-level signal to the grid electrode of the third switching tube when the input voltage of the battery pack in the bypass power supply circuit is smaller than the reference voltage;
the source electrode of the third switching tube is connected with the output end of the bypass power supply circuit; the drain electrode of the third switching tube is connected with the input end of the first diode; the output end of the first diode is connected with a load.
8. The UPS power source of claim 6 wherein the gating circuit includes a comparator and a third switching tube;
the comparator is used for outputting a high-level signal to the grid electrode of the third switching tube when the output voltage of the main circuit power supply circuit is not smaller than the reference voltage;
the comparator is used for outputting a low-level signal to the grid electrode of the third switching tube when the output voltage of the main circuit power supply circuit is smaller than the reference voltage;
the source electrode of the third switching tube is connected with the output end of the bypass power supply circuit; the drain electrode of the third switching tube is connected with the input end of the first diode; the output end of the first diode is connected with a load.
9. The UPS power source of any one of claims 1-8, wherein the main power circuit includes an AC/DC converter; the first end of the AC/DC converter is connected with an alternating current input power supply; the second end of the AC/DC converter is connected with a load.
10. The UPS power source of any one of claims 1-8, wherein the bypass power supply circuit includes a charger and a battery pack;
the first end of the charger is connected with an alternating current input power supply; the second end of the charger is connected with the first end of the battery pack; the second end of the battery pack is connected with the cut-off circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310446359.0A CN116436143A (en) | 2023-04-24 | 2023-04-24 | UPS power supply |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310446359.0A CN116436143A (en) | 2023-04-24 | 2023-04-24 | UPS power supply |
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| CN116436143A true CN116436143A (en) | 2023-07-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202310446359.0A Pending CN116436143A (en) | 2023-04-24 | 2023-04-24 | UPS power supply |
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|---|---|
| CN (1) | CN116436143A (en) |
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2023
- 2023-04-24 CN CN202310446359.0A patent/CN116436143A/en active Pending
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