CN209948781U - Uninterrupted power supply - Google Patents
Uninterrupted power supply Download PDFInfo
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- CN209948781U CN209948781U CN201920835831.9U CN201920835831U CN209948781U CN 209948781 U CN209948781 U CN 209948781U CN 201920835831 U CN201920835831 U CN 201920835831U CN 209948781 U CN209948781 U CN 209948781U
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Abstract
The utility model provides an uninterruptible power supply, which comprises a bypass, a main circuit and a change-over switch for executing the output switching of the bypass and the main circuit; the bypass inductor of the bypass is connected with the main circuit inductor of the main circuit in series through the selector switch; when the switch is switched to the bypass output, the input of the bypass power supply is output to the load through the bypass inductor, the switch and the main circuit inductor. The utility model discloses can improve uninterrupted power source's device utilization ratio to be favorable to the miniaturized design of uninterrupted power source product.
Description
Technical Field
The utility model belongs to the technical field of electric power, more specifically say, relate to an uninterrupted power source.
Background
In order to improve the reliability of Power Supply, the conventional Uninterruptible Power Supply (UPS) is usually configured with two Power Supply inputs, namely a main circuit and a bypass, wherein the main circuit is powered by mains Supply or is powered by an energy storage unit (such as a storage battery) when the mains Supply fails, and the bypass is connected with a standby Power Supply (such as other mains supplies or a generator for Power generation) and is powered by the standby Power Supply when the main circuit fails.
In practical application, at least one inductor needs to be connected in series on the bypass to suppress differential mode interference, and the inductor can be called a bypass inductor. At least one inductor is also required to be connected in series with the main circuit to suppress sudden current change on the main circuit, and the inductor can be called a main circuit inductor.
However, since the main circuit and the bypass of the UPS are not usually operated at the same time, that is, when the bypass inductor operates, the main circuit inductor is disabled, which results in low utilization of the UPS devices; in addition, since the bypass inductor and the main circuit inductor need to be arranged, the available space inside the UPS is undoubtedly reduced, so that the volume of the UPS is increased, and the miniaturization of products is not facilitated.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an uninterrupted power source aims at solving among the prior art uninterrupted power source's device utilization ratio not high and be unfavorable for the problem of product miniaturization.
In order to achieve the above object, the utility model adopts the following technical scheme: an uninterruptible power supply is provided, which includes a bypass, a main circuit, and a changeover switch that performs output changeover of the bypass and the main circuit;
the bypass inductor of the bypass is connected with the main circuit inductor of the main circuit in series through the selector switch; when the switch is switched to the bypass output, the input of the bypass power supply is output to the load through the bypass inductor, the switch and the main circuit inductor.
Optionally, the bypass inductor and the main circuit inductor are a first winding and a second winding on the same magnetic core, respectively.
Optionally, the bypass includes a three-phase input bypass, the bypass inductance of the three-phase input bypass includes a first bypass inductance, a second bypass inductance, and a third bypass inductance, the main circuit includes a three-phase input main circuit, the main circuit inductance of the three-phase input main circuit includes a first main circuit inductance, a second main circuit inductance, and a third main circuit inductance, and the change-over switch includes a first change-over switch, a second change-over switch, and a third change-over switch;
the first bypass inductor is connected with the first main circuit inductor through the first selector switch to form a first phase input bypass; the second bypass inductor is connected with the second main circuit inductor through the second selector switch to form a second phase input bypass; the third bypass inductor is connected with the third main circuit inductor through the third selector switch to form a third phase input bypass;
when the first change-over switch, the second change-over switch and the third change-over switch are all switched to bypass outputs, the three-phase alternating current power supply connected with the three-phase input bypass outputs to the load through the first phase input bypass, the second phase input bypass and the third phase input bypass.
Optionally, the first bypass inductor and the first main inductor are respectively a first winding and a second winding on a first magnetic core, the second bypass inductor and the second main inductor are respectively a first winding and a second winding on a second magnetic core, and the third bypass inductor and the third main inductor are respectively a first winding and a second winding on a third magnetic core.
Optionally, the main circuit is a three-phase input main circuit, and when the bypass is a single-phase input bypass, the bypass inductor is connected in series with the main circuit inductor of the phase input main circuit through a change-over switch of any phase input main circuit of the three-phase input main circuit.
Optionally, the bypass inductor and the main circuit inductor connected in series with the bypass inductor are respectively a first winding and a second winding on the same magnetic core.
Optionally, the switch comprises a transfer-type relay.
Optionally, the uninterruptible power supply further includes a freewheeling circuit; the free-wheeling circuit is used for providing continuous power supply for a load within a first switching time and a second switching time, wherein the first switching time represents the action time of the selector switch for switching the bypass to the main circuit, and the second switching time represents the action time of the selector switch for switching the main circuit to the bypass.
Optionally, the freewheeling circuit includes a thyristor connected in parallel with a series circuit formed by the switch and the main circuit inductor.
Optionally, the thyristor is a bidirectional thyristor.
The utility model provides an uninterrupted power source's beneficial effect lies in: compared with the prior art, the uninterrupted power supply provided by the utility model comprises the bypass, the main circuit and the change-over switch, the bypass inductor is connected with the main circuit inductor in series through the change-over switch, the change-over of the bypass and the main circuit can be executed through the change-over switch, when the switch is switched to the bypass output, the input of the bypass power supply can be output to the load through the bypass inductor, the switch and the main circuit inductor, namely the bypass inductor and the main circuit inductor work simultaneously during the bypass output, the inductance during the bypass output is the sum of the inductances of the bypass inductor and the main circuit inductor, since the inductance of the inductor is increased along with the increase of the number of turns of the coil, the inductor with less turns of the coil can be selected when the bypass inductor is actually configured, therefore, the utility model discloses an aspect is favorable to the miniaturized design of uninterrupted power source product, and on the other hand has still improved uninterrupted power source's device utilization ratio.
Drawings
Fig. 1 is a schematic diagram of an uninterruptible power supply according to the prior art;
fig. 2 is a schematic structural diagram of an uninterruptible power supply according to an embodiment of the present invention;
fig. 3 is a schematic diagram illustrating connection between a bypass inductor and a main circuit inductor of the same magnetic core according to an embodiment of the present invention;
fig. 4 is another schematic structural diagram of an uninterruptible power supply according to an embodiment of the present invention.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
It is now clear that the utility model provides an uninterruptible power supply is explained. Please refer to fig. 1 and fig. 2, wherein fig. 1 is a schematic structural diagram of an uninterruptible power supply in the prior art, and fig. 2 is a schematic structural diagram of an uninterruptible power supply according to an embodiment of the present invention.
As shown in fig. 1, a bypass of an Uninterruptible Power Supply (UPS) in the related art includes a bypass switch 112 and a bypass inductor 111, and a main circuit includes a main circuit switch 122, a rectifying unit 123, an energy storage unit 124, an inverter 125, and a main circuit inductor 121.
When the UPS is operating in the bypass output mode, the bypass switch 112 may be closed and the main switch 122 may be opened, and the bypass power input may be output to the load through the bypass inductor 111 via the bypass switch 112.
As shown in fig. 2, an uninterruptible power supply according to an embodiment of the present invention includes a bypass, a main circuit, and a switch 222 for performing output switching between the bypass and the main circuit; the bypass inductor 211 of the bypass is connected in series with the main inductor 221 of the main circuit through the switch 222; when the switch 222 is switched to the bypass output, the input of the bypass power is output to the load via the bypass inductor 211, the switch 222, and the main circuit inductor 221. Therefore, when the UPS works in the bypass output mode, the bypass inductor and the main circuit inductor work simultaneously, and the utilization rate of devices is improved.
And, total inductance volume during bypass output is the inductance volume sum of main road inductance and bypass inductance, is favorable to UPS's miniaturization through such connection configuration, for example, if the bypass need dispose the inductance volume for 10 uH's bypass inductance among the prior art, through this embodiment, only need for 5 uH's bypass inductance of bypass configuration can, because it establishes ties with 5 uH's main road inductance, the total inductance volume of during operation bypass still is 10uH, and is visible, compares prior art, the utility model provides a UPS can be in the less bypass inductance of bypass configuration for prior art inductance volume at the bypass, has reduced the occupation of UPS inner space, is favorable to realizing the miniaturization of UPS product.
To sum up, the utility model provides an uninterrupted power source compares beneficial effect with prior art and lies in: the bypass inductance passes through change over switch and main road inductance series connection, can carry out the switching of bypass and main road through change over switch, when change over switch switches over to the bypass output, bypass inductance can be passed through to the input of bypass power, change over switch and main road inductance are to load output, bypass inductance and main road inductance are simultaneous working when also being bypass output, inductance during bypass output is bypass inductance and main road inductance and, and because the inductance of inductance is along with the increase of its coil number of turns and increase, so can select the inductance that the coil number of turns is less when configuring bypass inductance actually, therefore, the utility model discloses an aspect is favorable to the miniaturized design of uninterrupted power source product, and on the other hand has still improved uninterrupted power source's device utilization ratio.
Optionally, in order to further realize the miniaturization of the UPS product, in the embodiment of the present invention, the bypass inductor and the main circuit inductor may be the first winding and the second winding on the same magnetic core, respectively. The bypass inductor and the main circuit inductor can be designed into the same magnetic core, and the bypass inductor and the main circuit inductor are respectively two different windings on the same magnetic core.
Please refer to fig. 3, which is a schematic diagram illustrating a connection between a bypass inductor and a main circuit inductor of a common magnetic core according to an embodiment of the present invention. The input of the bypass power supply is connected in series with the main circuit inductor 221 through the bypass inductor 211 and the switch 222, and the bypass inductor 211 and the main circuit inductor 221 are respectively a first winding and a second winding on the same magnetic core. The utility model discloses a design with the magnetic core has further reduced inductance device's volume.
Please refer to fig. 4, which is a schematic structural diagram of an ups according to an embodiment of the present invention. A UPS for three-phase input single output connection in practical application.
As shown in fig. 4, the bypass is a three-phase input bypass, the bypass inductance of the three-phase input bypass includes a first bypass inductance, a second bypass inductance, and a third bypass inductance, the main path includes a three-phase input main path, the main path inductance of the three-phase input main path includes a first main path inductance, a second main path inductance, and a third main path inductance, and the change-over switch includes a first change-over switch, a second change-over switch, and a third change-over switch; the first bypass inductor is connected with the first main circuit inductor through the first selector switch to form a first phase input bypass; the second bypass inductor is connected with the second main circuit inductor through the second selector switch to form a second phase input bypass; the third bypass inductor is connected with the third main circuit inductor through the third selector switch to form a third phase input bypass.
When the first change-over switch, the second change-over switch and the third change-over switch are all switched to bypass outputs, the three-phase alternating current power supply connected with the three-phase input bypass outputs to the load through the first phase input bypass, the second phase input bypass and the third phase input bypass. That is, the UPS can supply power to the load in a 31-mode with three-phase input and single-phase output, USide wall、VSide wallAnd WSide wallFirst, second and third phase inputs of a three-phase ac power source representing bypass power inputs, respectively. U shapeMaster and slave、VMaster and slaveAnd WMaster and slaveFirst, second and third phase inputs of a three-phase ac power source are respectively represented as a main circuit power source input. The bypass output of each phase is designed into a connection mode that the bypass inductor is connected with the main circuit inductor in series through the change-over switch, so that the device utilization rate of the UPS is improved, and the internal space occupation of the UPS is reduced.
Optionally, the first bypass inductor and the first main inductor are respectively a first winding and a second winding on a first magnetic core, the second bypass inductor and the second main inductor are respectively a first winding and a second winding on a second magnetic core, and the third bypass inductor and the third main inductor are respectively a first winding and a second winding on a third magnetic core. Therefore, the internal space occupation of the UPS can be further reduced, and the miniaturization of the UPS is realized.
In an alternative embodiment, the main circuit of the UPS is connected to the three-phase ac input, and the bypass inductor is connected to the single-phase input in series with the main circuit inductor of any one of the three-phase input main circuits through the switch of the input main circuit.
Optionally, the bypass inductor and the main circuit inductor connected in series with the bypass inductor are respectively a first winding and a second winding on the same magnetic core.
Optionally, in the above embodiment, the switch may be a transfer-type relay, as shown in the switch in fig. 3, the transfer-type relay may implement automatic switching by controlling a large current with a small current, and plays roles in automatic adjustment, safety protection, and circuit switching in a circuit.
Optionally, referring to fig. 2, in practical applications, when the switch 222 performs the switching between the main path and the bypass path, there is a delay of about 10 ms. In the above embodiment, the uninterruptible power supply may further include a freewheel circuit 212; the freewheel circuit 212 is configured to provide a continuous power supply to the load for a first switching time and a second switching time, wherein the first switching time represents an action time for the switch 222 to perform the switching of the bypass to the main path, and the second switching time represents an action time for the switch 222 to perform the switching of the main path to the bypass. During the action time of the switch 222 for switching, the power is supplied to the load through the freewheeling circuit 212, so that the load can be prevented from being powered off during the action time of the switch 222 for switching.
In an alternative embodiment, freewheel circuit 222 may include a thyristor connected in parallel with the series circuit of switch 222 and main circuit inductor 221.
When the switch 222 performs the switching of the bypass to the main circuit, the power supply to the load may be continued through the thyristor for a first switching time, for example, by applying a trigger voltage to the gate of the thyristor during the first switching time, so that the bypass power supply input may still supply power to the load during the first switching time. And after the switch 222 completes the switching from the bypass to the main circuit, the trigger voltage applied to the control electrode of the thyristor is turned off, so that the bypass power input no longer supplies power to the load, but the main circuit power input supplies power to the load through the rectifying unit 223, the inverter 225, the switch 222 and the main circuit inductor 221.
When the changeover switch 222 performs the switching of the main path to the bypass, the power supply to the load can be connected to the bypass for the second switching time through the thyristor. For example, the bypass power input may be powered to the load during the second switching time by applying a trigger voltage to the gate of the thyristor to temporarily conduct the current between the bypass inductor and the load through the thyristor during the second switching time. And after the switch 222 completes the switching from the main circuit to the bypass, the trigger voltage applied to the control electrode of the thyristor is turned off, so that the bypass power input provides bypass power supply to the load through the bypass inductor 211, the switch 222 and the main circuit inductor 221.
Further, the thyristor may be a triac.
Alternatively, the above-mentioned magnetic core may be any one of an I-piece combined magnetic core, a bar-shaped magnetic core, a ring-shaped magnetic core, a track magnetic core, and an E-shaped magnetic core.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. An uninterruptible power supply, comprising a bypass, a main circuit, and a changeover switch that performs output changeover of the bypass and the main circuit;
the bypass inductor of the bypass is connected with the main circuit inductor of the main circuit in series through the selector switch;
when the switch is switched to the bypass output, the input of the bypass power supply is output to the load through the bypass inductor, the switch and the main circuit inductor.
2. The uninterruptible power supply of claim 1, wherein the bypass inductance and the main inductance are first and second windings, respectively, on a same magnetic core.
3. The uninterruptible power supply of claim 1, wherein the bypass comprises a three-phase input bypass, the bypass inductance of the three-phase input bypass comprises a first bypass inductance, a second bypass inductance, and a third bypass inductance, the main path comprises a three-phase input main path, the main path inductance of the three-phase input main path comprises a first main path inductance, a second main path inductance, and a third main path inductance, and the change-over switch comprises a first change-over switch, a second change-over switch, and a third change-over switch;
the first bypass inductor is connected with the first main circuit inductor through the first selector switch to form a first phase input bypass; the second bypass inductor is connected with the second main circuit inductor through the second selector switch to form a second phase input bypass; the third bypass inductor is connected with the third main circuit inductor through the third selector switch to form a third phase input bypass;
when the first change-over switch, the second change-over switch and the third change-over switch are all switched to bypass outputs, the three-phase alternating current power supply connected with the three-phase input bypass outputs to the load through the first phase input bypass, the second phase input bypass and the third phase input bypass.
4. The uninterruptible power supply of claim 3, wherein the first bypass inductance and the first main inductance are a first winding and a second winding, respectively, on a first magnetic core, the second bypass inductance and the second main inductance are a first winding and a second winding, respectively, on a second magnetic core, and the third bypass inductance and the third main inductance are a first winding and a second winding, respectively, on a third magnetic core.
5. The uninterruptible power supply according to claim 1, wherein the main circuit is a three-phase input main circuit, and when the bypass is a single-phase input bypass, the bypass inductor is connected in series with the main circuit inductor of any one of the three-phase input main circuits through a change-over switch of the phase input main circuit.
6. The uninterruptible power supply of claim 5, wherein the bypass inductor and the main inductor connected in series with the bypass inductor are a first winding and a second winding, respectively, on a same magnetic core.
7. The uninterruptible power supply of any of claims 1 to 6, wherein the diverter switch comprises a transfer-type relay.
8. The uninterruptible power supply of any of claims 1 to 6, further comprising a freewheeling circuit;
the free-wheeling circuit is used for providing continuous power supply for a load within a first switching time and a second switching time, wherein the first switching time represents the action time of the selector switch for switching the bypass to the main circuit, and the second switching time represents the action time of the selector switch for switching the main circuit to the bypass.
9. The uninterruptible power supply of claim 8, wherein the freewheeling circuit comprises a thyristor connected in parallel with a series circuit of the switch and the main circuit inductor.
10. The uninterruptible power supply of claim 9, wherein the thyristor is a triac.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920835831.9U CN209948781U (en) | 2019-06-04 | 2019-06-04 | Uninterrupted power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920835831.9U CN209948781U (en) | 2019-06-04 | 2019-06-04 | Uninterrupted power supply |
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| Publication Number | Publication Date |
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| CN209948781U true CN209948781U (en) | 2020-01-14 |
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| CN201920835831.9U Active CN209948781U (en) | 2019-06-04 | 2019-06-04 | Uninterrupted power supply |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115843410A (en) * | 2022-09-09 | 2023-03-24 | 航霈科技(深圳)有限公司 | Redundant power supply device, system, uninterruptible power supply equipment, switch and control method |
-
2019
- 2019-06-04 CN CN201920835831.9U patent/CN209948781U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115843410A (en) * | 2022-09-09 | 2023-03-24 | 航霈科技(深圳)有限公司 | Redundant power supply device, system, uninterruptible power supply equipment, switch and control method |
| CN115843410B (en) * | 2022-09-09 | 2023-10-13 | 航霈科技(深圳)有限公司 | Redundant power supply device, system, uninterruptible power supply equipment, switch and control method |
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