UPS circuit and electronic equipment

Abstract

The utility model belongs to the technical field of power supplies, and provides a UPS circuit and an electronic device. The UPS circuit is connected with the control module and comprises a direct current bus; the first bidirectional inverter module is connected with a power grid, and the first bidirectional inverter module is further connected with the first end of the direct current bus; the second bidirectional inverter module is connected with a load, and the first bidirectional inverter module is further connected with the second end of the direct current bus; and the control module is used for sampling the UPS circuit, and is also used for controlling the conduction of the first bidirectional inverter module. The UPS circuit provided by the utility model can feed back the residual output energy of the load end to a power grid, thereby achieving the effects of reducing energy loss and improving the overall energy utilization efficiency.

Description

Technical Field

[0001] The utility model belongs to the technical field of power supplies, and particularly relates to a UPS circuit and an electronic device. Background Art

[0002] A UPS (Uninterruptible Power Supply) circuit is a power system design used to provide continuous and reliable power supply in case of power interruption or unstable power quality. The main function of the UPS circuit is to ensure that the connected devices can continue to operate for a period of time in case of power outage or voltage fluctuation, thus avoiding data loss, equipment damage or system interruption.

[0003] In the prior art, when there is remaining output energy at the load end of the UPS, the remaining output energy will feedback from the load end to the DC bus, resulting in an increase in the voltage of the DC bus. At this time, the remaining output energy will be consumed by the DC load. However, this way of using the DC load to consume the remaining output energy will cause energy waste. Summary of the Utility Model

[0004] The utility model provides a UPS circuit and an electronic device, aiming to solve the technical problem that the existing way of consuming the remaining output energy of the UPS circuit will cause energy waste.

[0005] The embodiment of the utility model is implemented as follows. The utility model provides a UPS circuit and an electronic device. The UPS circuit is connected to a control module. The UPS circuit includes: a DC bus; a first bidirectional inverter module, which is connected to the power grid and also connected to the first end of the DC bus; a second bidirectional inverter module, which is connected to the load and also connected to the second end of the DC bus; the control module samples the UPS circuit and is also used to control the conduction of the first bidirectional inverter module.

[0006] Furthermore, the UPS circuit further includes: the first bidirectional inverter module is of a T-type three-level topology.

[0007] Furthermore, the second bidirectional inverter module is of a T-type three-level topology.

[0008] Further, the first bidirectional inverter module includes: a first inductor, a first power switch, a second power switch, a third power switch, and a fourth power switch; the other end of the first inductor is respectively connected to one end of the first power switch, the other end of the second power switch, and one end of the third power switch; the other end of the first power switch is connected to the other end of the fourth power switch, and one end of the second power switch, one end of the fourth power switch, and the other end of the third power switch are respectively connected to the DC bus.

[0009] Further, the second bidirectional inverter module includes: a second inductor, a fifth power switch, a sixth power switch, a seventh power switch, and an eighth power switch; one end of the second inductor is respectively connected to one end of the fifth power switch, the other end of the sixth power switch, and one end of the seventh power switch; the other end of the fifth power switch is connected to the other end of the eighth power switch, and one end of the sixth power switch, the other end of the seventh power switch, and one end of the eighth power switch are respectively connected to the DC bus.

[0010] Further, the UPS circuit further includes a first filter module, and the first filter module is disposed between the power grid and the first bidirectional inverter module.

[0011] Further, the UPS circuit further includes a second filter module, and the second filter module is disposed between the load and the second bidirectional inverter module.

[0012] Further, the UPS circuit further includes an ammeter, and the ammeter is disposed between the power grid and the first filter module.

[0013] Further, the UPS circuit further includes a battery power supply, and the battery power supply is connected to the DC bus.

[0014] The embodiment of the present invention further provides an electronic device, and the electronic device includes the UPS circuit as described above.

[0015] A UPS circuit and an electronic device provided by the embodiment of the present invention. Through the setting of the first bidirectional inverter module and the second bidirectional inverter module of the UPS circuit structure in the present invention, the surplus output energy at the load end can be fed back to the power grid, avoiding the need for power loads to consume the redundant energy in the prior art, achieving the effect of reducing energy loss and improving the overall energy utilization efficiency. Description of the Drawings

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments recorded in the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 Schematic diagram of the circuit principle of a UPS circuit provided for an embodiment of the utility model;

[0018] Figure 2 For Figure 1 Schematic diagram of the circuit principle when the UPS circuit described in has a first filtering module and a second filtering module;

[0019] Figure 3 For Figure 2 Schematic diagram of the circuit principle when the UPS circuit described in has an ammeter;

[0020] Figure 4 For Figure 3 Schematic diagram of the specific circuit structure of the UPS circuit described in .

[0021] Main component symbol description: 10, DC bus; 20, first bidirectional inverter module; 30, second bidirectional inverter module; 40, power grid; 50, load; 60, battery power supply; 70, first filtering module; 80, second filtering module; 90, ammeter; 100, control module; L1, first inductor; L2, second inductor; L3, third inductor; L4, fourth inductor; C1, first capacitor; C2, second capacitor; Q1, first power switch tube; Q2, second power switch tube; Q3, third power switch tube; Q4, fourth power switch tube; Q5, fifth power switch tube; Q6, sixth power switch tube; Q7, seventh power switch tube; Q8, eighth power switch tube. Specific implementation manners

[0022] In order to enable those skilled in the art to better understand the solution of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0023] In the prior art, when there is remaining output energy at the load end of the UPS, the remaining output energy will be fed back from the load end to the DC bus, resulting in an increase in the voltage of the DC bus. At this time, the remaining output energy will be consumed by the DC load. However, this method of using the DC load to consume the remaining output energy will cause energy waste. However, this method of using the feedback load to consume the remaining output energy will cause energy waste and it is difficult to configure the feedback load and the load at the load end.

[0024] Therefore, in order to solve the above technical problems, the present utility model provides a UPS circuit and an electronic device.

[0025] Please refer to Figures 1 to 4 , an embodiment of the present utility model provides a UPS circuit, which can be applied to one or more electronic devices such as data centers and server devices, medical devices, communication devices, industrial devices, home and office devices, financial devices, security devices, transportation devices, scientific research devices, etc.

[0026] As Figure 1 shown, the UPS circuit is connected to the control module 100. The UPS circuit specifically includes: a DC bus 10, a first bidirectional inverter module 20, a second bidirectional inverter module 30, and a control module 100. The DC bus 10 has a first end, a second end, and a third end; the first bidirectional inverter module 20 is connected to the power grid 40, and the first bidirectional inverter module 20 is also connected to the first end of the DC bus 10. The first bidirectional inverter module 20 is specifically arranged between the power grid 40 and the DC bus 10; the second bidirectional inverter module 30 is connected to the load 50, and the first bidirectional inverter module 20 is also connected to the second end of the DC bus 10. The second bidirectional inverter module 30 is specifically arranged between the load 50 and the DC bus 10; the control module 100 is used to sample the UPS circuit, and the control module 100 is also used to control the conduction of the first bidirectional inverter module 20.

[0027] Specifically, in the present application, the inverter rectifier structures arranged at both ends of the DC bus 10 are both set as bidirectional inverters, that is, the first bidirectional inverter module 20 and the second bidirectional inverter module 30. Both inverter modules can rectify alternating current in one direction and invert direct current in the opposite direction.

[0028] Therefore, in the present utility model, for the specific energy flow mode, firstly, it is the process of the power grid 40 supplying energy to the load 50. The output energy from the power grid 40 is in the form of alternating current, which will be rectified into direct current output energy by the first bidirectional inverter module 20 and output to the DC bus 10. Then, the DC bus 10 will invert the direct current output energy into alternating current output energy through the second bidirectional inverter module 30 and output it to the load 50.

[0029] Of course, in some cases, the energy generated at the load 50 end will generate surplus output energy, that is, surplus energy. The surplus energy will be output from the load 50 to the second bidirectional inverter module 30. Since the second bidirectional inverter module 30 is a bidirectional inverter module, at this time, the load 50 serves as the input end of the second bidirectional inverter module 30, and the DC bus 10 serves as the output end of the second bidirectional inverter module 30. The second bidirectional inverter module 30 will rectify the alternating current surplus energy into direct current surplus energy and output it to the DC bus 10. And because the control module 100 samples the UPS circuit, when the control module 100 samples that there is surplus energy on the DC bus 10, the control module 100 will output a first control signal to turn on the first bidirectional inverter module 20. Since the first bidirectional inverter module 20 is also a bidirectional inverter module, at this time, the DC bus 10 serves as the input end of the first bidirectional inverter module 20, and the power grid 40 serves as the output end of the second bidirectional inverter module 30. The DC bus 10 outputs the surplus energy to the first bidirectional inverter module 20, and the first bidirectional inverter module 20 inverts the direct current surplus energy into alternating current surplus energy and feeds it back to the power grid 40.

[0030] Therefore, through the setting of the UPS circuit structure in the present utility model, it can be realized that the surplus output energy at the load 50 end can be fed back to the power grid 40, avoiding the need for the power load 50 to consume the redundant energy in the prior art, achieving the effect of reducing energy loss and improving the overall energy utilization efficiency.

[0031] Furthermore, in the UPS circuit provided in the embodiment of the present utility model, a filtering module is also provided. As Figure 2 shown, in a possible implementation manner, the UPS circuit further includes: a first filtering module 70 and a second filtering module 80. The first filtering module 70 is arranged between the power grid 40 and the first bidirectional inverter module 20, and the first filtering module 70 is respectively connected to the power grid 40 and the first bidirectional inverter module 20; the second filtering module 80 is arranged between the load 50 and the second bidirectional inverter module 30, and the second filtering module 80 is respectively connected to the load 50 and the second bidirectional inverter module 30.

[0032] Furthermore, as Figure 3As shown, in the UPS circuit provided by the embodiment of the present utility model, an ammeter 90 is further provided. In a possible implementation manner, the UPS circuit further includes an ammeter 90. The ammeter 90 is disposed between the power grid 40 and the first filtering module 70, and the ammeter 90 is respectively connected to the power grid 40 and the first filtering module 70. The ammeter 90 can specifically be used for the island detection of the UPS circuit to meet the grid connection requirements.

[0033] Specifically, as Figure 3 and Figure 4 shown, in a possible implementation manner, for the specific circuit structure of the UPS circuit, the first filtering module 70 specifically includes: a third inductor L3 and a first capacitor C1; the second filtering module 80 specifically includes: a fourth inductor L4 and a second capacitor C2. One end of the ammeter 90 is connected to the power grid 40, the other end of the ammeter 90 is connected to one end of the third inductor L3, the other end of the third inductor L3 is respectively connected to one end of the first capacitor C1 and the first bidirectional inverter module 20, and the other end of the first capacitor C1 is grounded; one end of the fourth inductor L4 is connected to the load 50, the other end of the fourth inductor L4 is respectively connected to one end of the second capacitor C2 and the second bidirectional inverter module 30, and the other end of the second capacitor C2 is grounded.

[0034] Further, in a possible implementation manner, the UPS circuit further includes a battery power supply 60, and the battery power supply 60 is connected to the DC bus 10.

[0035] Further, as Figure 4 shown, for the specific structural settings of the first bidirectional inverter module 20 and the second bidirectional inverter module 30, in a possible implementation manner, the first bidirectional inverter module 20 is specifically a T-type three-level topology; the second bidirectional inverter module 30 is a T-type three-level topology.

[0036] Specifically, in the present application, by setting the first bidirectional inverter module 20 and the second bidirectional inverter module 30 to a three-level topology, both the first bidirectional inverter module 20 and the second bidirectional inverter module 30 can simultaneously have rectification and inversion functions, enabling the energy in the UPS circuit to continue to flow bidirectionally, that is, the output energy of the power grid 40 can be input to the load 50, and the remaining energy of the load 50 can also be fed back to the power grid 40.

[0037] Further, for the specific circuit connection manner of the three-level topology of the first bidirectional inverter module 20 and the second bidirectional inverter module 30, as Figure 4As shown in the figure, the first bidirectional inverter module 20 includes: a first inductor L1, a first power switch Q1, a second power switch Q2, a third power switch Q3, and a fourth power switch Q4. One end of the first inductor L1 is respectively connected to the other end of the third inductor L3 and one end of the first capacitor C1, and the other end of the first inductor L1 is respectively connected to one end of the first power switch Q1, the other end of the second power switch Q2, and one end of the third power switch Q3; the other end of the first power switch Q1 is connected to the other end of the fourth power switch Q4, and one end of the fourth power switch Q4, one end of the second power switch Q2, and the other end of the third power switch Q3 are respectively connected to the DC bus 10.

[0038] The second bidirectional inverter module 30 includes: a second inductor L2, a fifth power switch Q5, a sixth power switch Q6, a seventh power switch Q7, and an eighth power switch Q8; one end of the second inductor L2 is respectively connected to one end of the fifth power switch Q5, the other end of the sixth power switch Q6, and one end of the seventh power switch Q7, and the other end of the second inductor L2 is respectively connected to one end of the fourth inductor L4 and one end of the second capacitor C2; the other end of the fifth power switch Q5 is connected to the other end of the eighth power switch Q8, and one end of the sixth power switch Q6, the other end of the seventh power switch Q7, and one end of the eighth power switch Q8 are respectively connected to the DC bus 10.

[0039] Moreover, the control module 100 can specifically be connected to each power switch (the first power switch Q1, the second power switch Q2, the third power switch Q3, and the fourth power switch Q4) of the first bidirectional inverter module 20 and each power switch (the fifth power switch Q5, the sixth power switch Q6, the seventh power switch Q7, and the eighth power switch Q8) of the second bidirectional inverter module 30 to control the switching conduction of each power switch. Therefore, the control module 100 can specifically control the conduction or non-conduction of the first bidirectional inverter module 20 and the second bidirectional inverter module 30. Preferably, the control module 100 can specifically include a chip with the model TI#TMS320F28377SPTPT.

[0040] Regarding the working mode of the specific circuit structure of the present utility model. During the process of the power grid 40 outputting energy: In the first bidirectional inverter module 20, when the first bidirectional inverter module 20 receives the output energy from the power grid 40 for rectification, the positive half-cycle energy of the sine wave output by the power grid 40 is rectified and transformed by the first inductor L1, the second power switch Q2, the first power switch Q1, and the fourth power switch Q4 in the first bidirectional inverter module 20 and then output to the DC bus 10. The negative half-cycle energy of the sine wave output by the power grid 40 is rectified and transformed by the first inductor L1, the third power switch Q3, the first power switch Q1, and the fourth power switch Q4 in the first bidirectional inverter module 20 and then output to the DC bus 10. In the second bidirectional inverter module 30, when the second bidirectional inverter module 30 receives the output energy from the DC bus 10 for inversion, the positive half-cycle energy of the sine wave output by the DC bus 10 is inverted and transformed by the second inductor L2, the sixth power switch Q6, the fifth power switch Q5, and the eighth power switch Q8 in the second bidirectional inverter module 30 and then output to the load 50. The negative half-cycle energy of the sine wave output by the DC bus 10 is inverted and transformed by the second inductor L2, the seventh power switch Q7, the eighth power switch Q8, and the fifth power switch Q5 in the second bidirectional inverter module 30 and then output to the load 50.

[0041] During the process of the load 50 feeding back the remaining energy: In the second bidirectional inverter module 30, when the second bidirectional inverter module 30 receives the remaining energy output by the load 50 and rectifies it, at this time, the second bidirectional inverter module 30 is equivalent to a boost structure. The sinusoidal positive half-cycle energy output by the load 50 is rectified and transformed by the second inductor L2, the sixth power switch Q6, the fifth power switch Q5, and the eighth power switch Q8 in the second bidirectional inverter module 30 and output to the DC bus 10. The negative half-cycle energy of the negative sine output by the load 50 is rectified and transformed by the second inductor L2, the sixth power switch Q6, the fifth power switch Q5, and the eighth power switch Q8 in the second bidirectional inverter module 30 and output to the DC bus 10. In the first bidirectional inverter module 20, when the first bidirectional inverter module 20 receives the output energy output by the DC bus 10 and performs inversion, the sinusoidal positive half-cycle energy output by the DC bus 10 is inverted and transformed by the first inductor L1, the second power switch Q2, the first power switch Q1, and the fourth power switch Q4 in the first bidirectional inverter module 20 and output and fed back to the power grid 40. The negative half-cycle energy of the negative sine output by the DC bus 10 is inverted and transformed by the first inductor L1, the third power switch Q3, the first power switch Q1, and the fourth power switch Q4 in the first bidirectional inverter module 20 and output and fed back to the power grid 40. And, during this process, the control module 100 also samples the UPS circuit and controls the conduction of each power switch in the first bidirectional inverter module 20 to complete the process of feeding back the remaining energy to the power grid 40.

[0042] On the other hand, please refer to Figures 1 to 4 , the embodiment of the present invention also provides an electronic device, and the electronic device includes the above-mentioned UPS circuit. The electronic device may specifically include one or more electronic devices such as a data center and server devices, medical devices, communication devices, industrial devices, home and office devices, financial devices, security devices, transportation devices, and scientific research devices.

[0043] It should be noted that the present invention takes a UPS circuit and an electronic device as examples to introduce the specific structure and working principle of the present invention, but the application of the present invention is not limited to a UPS circuit and an electronic device, and can also be applied to the production and use of other similar workpieces.

[0044] In the description of this specification, the descriptions referring to terms such as "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiments or examples are included in at least one embodiment or example of this application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiments or examples. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0045] In addition, the above are only the preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of this application shall be included within the protection scope of this application.

Claims

1. A UPS circuit, connected to a control module, characterized in that: The UPS circuit comprises: DC bus; A first bidirectional inverter module, wherein the first bidirectional inverter module is connected to a power grid, and the first bidirectional inverter module is also connected to a first end of the DC bus; A second bidirectional inverter module, wherein the second bidirectional inverter module is connected to a load, and the first bidirectional inverter module is also connected to a second end of the DC bus; The control module samples the UPS circuit, and the control module is also used to control the conduction of the first bidirectional inverter module.

2. The UPS circuit according to claim 1, characterized in that: The first bidirectional inverter module is a T-type three-level topology.

3. The UPS circuit according to claim 2, characterized in that: The second bidirectional inverter module is a T-type three-level topology.

4. The UPS circuit according to claim 3, characterized in that: The first bidirectional inverter module includes: a first inductor, a first power switch tube, a second power switch tube, a third power switch tube and a fourth power switch tube; The other end of the first inductor is respectively connected to one end of the first power switch tube, the other end of the second power switch tube and one end of the third power switch tube; The other end of the first power switch tube is connected to the other end of the fourth power switch tube, and one end of the second power switch tube, one end of the fourth power switch tube and the other end of the third power switch tube are respectively connected to the DC bus.

5. The UPS circuit according to claim 4, characterized in that: The second bidirectional inverter module includes: a second inductor, a fifth power switch tube, a sixth power switch tube, a seventh power switch tube and an eighth power switch tube; One end of the second inductor is respectively connected to one end of the fifth power switch tube, the other end of the sixth power switch tube and one end of the seventh power switch tube; The other end of the fifth power switch tube is connected to the other end of the eighth power switch tube, and one end of the sixth power switch tube, the other end of the seventh power switch tube and one end of the eighth power switch tube are respectively connected to the DC bus.

6. The UPS circuit according to claim 1, characterized in that: The UPS circuit further includes a first filter module, which is disposed between the power grid and the first bidirectional inverter module.

7. The UPS circuit according to claim 1, characterized in that: The UPS circuit further includes a second filter module, and the second filter module is arranged between the load and the second bidirectional inverter module.

8. The UPS circuit according to claim 6, characterized in that: The UPS circuit further includes an electric meter, which is disposed between the power grid and the first filter module.

9. The UPS circuit according to claim 1, characterized in that: The UPS circuit also includes a battery power supply, and the battery power supply is connected to the DC bus.

10. An electronic device, characterized in that: Comprising a UPS circuit as claimed in any one of claims 1 to 9.

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