Distributed power supply circuit and distributed power supply
The distributed power supply circuit addresses the issue of large component sizes and parasitic effects in high-power AC-DC power supplies by using multiple sub-conversion circuits with integrated filters and converters, enhancing flexibility and filtering efficiency.
Patent Information
- Application Number
- CN202420842340.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-22
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2034-04-22
AI Technical Summary
Existing high-power AC-DC power supplies face challenges with large filter and AC-DC converter sizes due to power requirements, leading to restricted positioning and increased parasitic inductance and resistance from wire connections, which degrade the filtering effect.
A distributed power supply circuit with multiple sub-conversion circuits, each comprising a filter and an AC-DC converter connected in series, allowing flexible positioning and eliminating the need for wire connections by integrating filters and converters in parallel, thereby reducing parasitic effects and optimizing the filtering effect.
The solution enables more flexible positioning and reduces the size of individual components, minimizing parasitic inductance and resistance while maintaining effective filtering performance.
Smart Images
Figure CN222169632U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of circuit technology, and in particular to a distributed power supply circuit and a distributed power supply. Background Art
[0002] The structure of existing high-power AC-DC power supply is as follows Figure 1 As shown, a filter and an AC-DC converter are generally set in the housing. The AC input is input into the AC-DC converter after the filter and then outputs DC. Therefore, the power of the filter needs to match the input and output of the power supply to obtain a better filtering effect. If the power of the power supply system is large, the corresponding filter and AC-DC converter will need to have larger power, and the corresponding device size will also be larger.
[0003] Limited by the size and shape of the DC power supply, the location of the device is often affected. In many cases, the AC-DC converter and the filter are not directly connected, but connected through a wire. In this way, there will be some parasitic inductance and parasitic resistance on the wire, which will affect the filtering effect and lead to poor quality of the DC output voltage. Utility Model Content
[0004] The present application provides a distributed power supply circuit and a distributed power supply, which changes the internal circuit structure of an AC-DC direct current power supply so that the AC-DC converter and the filter can be directly connected, thereby avoiding the influence of parasitic inductance, parasitic resistance, etc. on the filtering effect.
[0005] In a first aspect, the present application provides a distributed power supply circuit, comprising: a plurality of sub-conversion circuits connected in parallel; each of the sub-conversion circuits comprises a filter and an AC-DC converter connected in series;
[0006] The sum of the maximum powers of the multiple filters is greater than or equal to the power of the AC input; the sum of the maximum powers of the multiple AC-DC converters is greater than or equal to the power of the DC output.
[0007] Optionally, the sum of the maximum powers of the multiple filters is equal to the power of the AC input; the sum of the maximum powers of the multiple AC-DC converters is equal to the power of the DC output.
[0008] Optionally, the maximum power of each of the filters is equal; the maximum power of each of the AC-DC converters is equal.
[0009] Optionally, in at least one of the sub-conversion circuits, the filter is arranged close to the AC-DC converter.
[0010] Optionally, in each of the sub-conversion circuits, the filter is arranged close to the AC-DC converter.
[0011] Optionally, a plurality of parallel nodes of the filters are used to connect an AC input; a plurality of parallel nodes of the AC-DC converters are used to connect a DC output.
[0012] In a second aspect, the present application provides a distributed power supply, including: a distributed power supply circuit as described in any one of the first aspect;
[0013] The filter parallel node of the distributed power supply circuit is connected to the AC input; the AC-DC converter parallel node of the distributed power supply circuit is connected to the DC output.
[0014] Optionally, it also includes: a casing; the components in the distributed power supply circuit are arranged in the casing.
[0015] The present application provides a distributed power supply circuit and a distributed power supply, which is different from the structure of one filter and one AC-DC converter in the prior art, and adopts a structure of multiple sets of filters and AC-DC converters in parallel. When achieving the same conversion target, the single filter and single converter in the present application scheme require lower power and smaller volume than the prior art, so the design of the setting position can be more flexible, which can reduce or even avoid the wire connection between the AC-DC converter and the filter, reduce parasitic inductance and parasitic resistance, and optimize the filtering effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a schematic diagram of the filter circuit structure of an AC-DC power supply in the related technology.
[0017] Figure 2 It is a structural diagram of a distributed power supply circuit provided in one embodiment of the present application. DETAILED DESCRIPTION
[0018] The following is combined with Figure 1-2 This application is described in further detail.
[0019] A commonly used filter in the related art is the EMI filter, which is composed of a low-pass filter circuit composed of an inductor and a capacitor, allowing the current of useful signals to pass through, while having a greater attenuation for higher frequency signals. In order to achieve higher power handling capabilities, the filter may need to use larger capacity capacitors, inductors and other components, as well as more complex heat dissipation structures, which usually leads to an increase in the size of the filter.
[0020] In high-power AC-DC power supplies, the AC input power is relatively large. For example, for a DC power supply with an output of 4kW, assuming the efficiency of the AC-DC converter is 90%, the AC input power is approximately 4.4kW. The filters and AC-DC converters used are both large in size, making it difficult to flexibly set their positions. They need to be connected using wires, which generates parasitic inductance and parasitic resistance.
[0021] Based on this, the present application provides a distributed power supply circuit and a distributed power supply, the structure of which is as follows: Figure 2 As shown, it includes: multiple sub-conversion circuits connected in parallel; each sub-conversion circuit includes a filter and an AC-DC converter connected in series; the sum of the maximum powers of the multiple filters is greater than or equal to the power of the AC input; the sum of the maximum powers of the multiple AC-DC converters is greater than or equal to the power of the DC output. The figure shows four sub-conversion circuits as an example, and the number can be adjusted according to needs in actual scenarios.
[0022] The solution of this embodiment divides a high-power AC-DC power supply into multiple low-power AC-DC units, and a filter is placed at the front end of each AC-DC unit, so that the position of the AC-DC unit can be flexibly arranged, and the structural design is not restricted. When achieving the same conversion target, the single filter and the single converter in the solution of this application have lower power and smaller volume than the prior art, so the design of the setting position can be more flexible, which can reduce or even avoid the wire connection between the AC-DC converter and the filter, reduce parasitic inductance and parasitic resistance, and optimize the filtering effect.
[0023] In some specific implementations, the sum of the maximum powers of the multiple filters is equal to the power of the AC input; the sum of the maximum powers of the multiple AC-DC converters is equal to the power of the DC output. In at least one sub-conversion circuit, the filter is set close to the AC-DC converter. In an excellent state, in each sub-conversion circuit, the filter is set close to the AC-DC converter. The parallel node of the multiple filters is used to connect the AC input; the parallel node of the multiple AC-DC converters is used to connect the DC output.
[0024] Corresponding to the above-mentioned DC power supply with an output of 4kW, AC-DC converters 1 to 4 are all 1kW in power, with a total power of 4kW. Each filter can withstand a power of approximately 1.1kW, which is consistent with the power of a traditional power supply. Since the power conversion part is changed from a 4kW AC-DC converter to four 1kW AC-DC converters, the structure design can be more flexible due to the smaller size of a single module. At the same time, since the size of the filter is also correspondingly smaller, the filter can be placed close to the 1kW AC-DC converter without using wires for connection, the parasitic parameters are smaller, and the filtering effect is better.
[0025] Accordingly, the distributed power supply may include the above-mentioned distributed power supply circuit; the filter parallel node of the distributed power supply circuit is connected to the AC input; the AC-DC converter parallel node of the distributed power supply circuit is connected to the DC output. It also includes: a housing; the components in the distributed power supply circuit are arranged in the housing.
[0026] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.
Claims
1. A distributed power supply circuit, characterized in that: include: A plurality of sub-conversion circuits connected in parallel; each of the sub-conversion circuits comprises a filter and an AC-DC converter connected in series; The sum of the maximum powers of the multiple filters is greater than or equal to the power of the AC input; the sum of the maximum powers of the multiple AC-DC converters is greater than or equal to the power of the DC output.
2. The distributed power supply circuit according to claim 1, characterized in that: The sum of the maximum powers of the plurality of filters is equal to the power of the AC input; the sum of the maximum powers of the plurality of AC-DC converters is equal to the power of the DC output.
3. The distributed power supply circuit according to claim 1 or 2, characterized in that: The maximum power of each of the filters is equal; the maximum power of each of the AC-DC converters is equal.
4. The distributed power supply circuit according to claim 3, characterized in that: In at least one of the sub-conversion circuits, the filter is arranged close to the AC-DC converter.
5. The distributed power supply circuit according to claim 4, characterized in that: In each of the sub-conversion circuits, the filter is arranged close to the AC-DC converter.
6. The distributed power supply circuit according to claim 1 or 2, characterized in that: The parallel nodes of the plurality of filters are used to connect the AC input; the parallel nodes of the plurality of AC-DC converters are used to connect the DC output.
7. A distributed power source, characterized in that: include: A distributed power supply circuit as claimed in any one of claims 1 to 6; The filter parallel node of the distributed power supply circuit is connected to the AC input; the AC-DC converter parallel node of the distributed power supply circuit is connected to the DC output.
8. The distributed power source according to claim 7, characterized in that: Also includes: Casing; the components in the distributed power supply circuit are arranged in the casing.