Decoupling and combination-based three-power-supply design method

Abstract

The invention relates to a three-mode power supply design method based on decoupling and combination. The method comprises the following steps: step 1, demand carding and analysis: demand determination, functional performance index analysis, structural feature analysis and load feature analysis; step 2, power source type spectrum selection; step 3, decoupling analysis: if a power supply result meeting the requirement is not selected, decoupling the new power supply into a power supply function module and a power supply minimum function unit step by step; step 4, model selection of a power supply function module and a power supply minimum function unit type spectrum; 5, expanding a profile spectrum: if a function module and a minimum function unit which meet requirements are not selected, performing new power supply three-mode design demonstration; 6, detailed design: carrying out combination design, interface design and structure design to form a new power supply; step 7, verifying; and step 8, acceptance and warehousing. According to the method, the universality of the power supply is improved in a decoupling and combination mode, so that the electric energy guarantee capability of equipment is improved.

Description

Technical Field

[0001] The invention relates to the field of switching power supplies, and in particular to a three-in-one power supply design method based on decoupling and combination. Background Art

[0002] Power supply is an indispensable part of electronic system, which is directly related to whether the system can work properly. At present, the coupling degree between power supply and system is high, and the power supply with the same function in different systems, different fields and different platforms is often not standardized due to factors such as system size layout. This greatly increases the design, manufacturing and maintenance costs. At the same time, due to the difference in the cognition of designers, the performance and reliability of the designed power supply are also very different.

[0003] With the development of technology and the proposal of the concept of modular electronic equipment, it is imperative to develop a suitable three-dimensional design method for power supply as a key power supply system to achieve the universalization, serialization and modularization of power supply. Summary of the invention

[0004] In order to solve the technical problem that the existing power supplies are too diverse to be three-in-one, the present invention provides a three-in-one power supply design method based on decoupling and combination.

[0005] The specific content of the present invention is as follows: A three-dimensional power supply design method based on decoupling and combination includes the following steps: Step 1: Requirements sorting and analysis: clarify requirements, analyze functional performance indicators, structural characteristics, and load characteristics; Step 2: Power supply spectrum selection: Select a power supply that meets the requirements from the existing power supply spectrum results; Step 3, decoupling analysis: If no power supply that meets the requirements is selected, the new power supply is decoupled step by step into power supply function modules and power supply minimum function units according to the component framework; Step 4: Selection of power supply function module and power supply minimum function unit type spectrum: Select the available results from the existing power supply function module type spectrum and power supply minimum function unit type spectrum; Step 5, spectrum expansion: If no functional module or minimum functional unit that meets the requirements is selected, the three-dimensional design demonstration of the new power supply is carried out, and the three-dimensional design and combination are considered step by step to form a new three-dimensional design scheme, and expand the spectrum of power supplies at all levels; Step 6, detailed design: carry out combination design, interface design, and structural design to form a new power supply; Step 7: Verification: Conduct simulation verification and physical verification of the new power supply; Step 8: Acceptance and storage: The new "three-in-one" power supply that has passed the verification shall apply for acceptance and identification, and be coded and stored.

[0006] Furthermore, the power supply spectrum system includes: the power supply is decoupled into functional modules, the functional modules include: power module, parallel module, monitoring module and filter module, wherein the number of power modules is ≥1, and the number of other modules is ≥0; the minimum functional unit of the power supply includes components and accessories.

[0007] Furthermore, the minimum functional unit of the power module includes: an isolated AC / DC power unit, a non-isolated AC / DC power unit, an isolated DC / DC power unit and a non-isolated DC / DC power unit.

[0008] Furthermore, the minimum functional unit of the filter module includes: a common mode filter unit, a differential mode filter unit, an active filter unit and an anti-surge unit.

[0009] Furthermore, the minimum functional unit of the parallel module includes: an anti-backflow parallel unit and a current sharing parallel unit.

[0010] Furthermore, the minimum functional unit of the monitoring module includes: a sampling unit, a control unit and a communication unit.

[0011] The power supply tri-integration method of the present invention improves the versatility of the power supply through decoupling and combination, thereby improving the power supply energy guarantee capability of the equipment. Compared with the existing methods, it has the following advantages: decoupling from the structural appearance, not restricted by the upper system, and realizing the tri-integration through functional modules; decoupling from the combined function, decomposing the success rate module, monitoring module, filtering module, and parallel module are all optional; decoupling from the platform performance, decomposing into the smallest functional unit, realizing the tri-integration across platforms, fields, and systems; decoupling from the number of power supply circuits, a combination of multiple minimum power units; using the building block method, combining installation, interconnection, packaging and other elements, to realize the corresponding power supply products. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The specific implementation of the present invention will be further explained below in conjunction with the accompanying drawings.

[0013] Figure 1 It is a schematic diagram of the power supply product composition; Figure 2 It is a schematic diagram of the overall decoupling idea of ​​the present invention; Figure 3 It is a schematic diagram of the design idea of ​​the three-in-one power supply combination of the present invention; Figure 4 It is a schematic diagram of the power supply "three-dimensional" design process of the present invention; Figure 5 It is the block diagram of the power spectrum system; Figure 6 A power supply combination block diagram of an embodiment; Figure 7 Schematic diagram of power supply of the embodiment.

[0014] Among them, 1-blind plug connector, 2-parallel module, 3-monitoring module, 4-housing, 5-filter module, 6-power module. DETAILED DESCRIPTION

[0015] Power supply products are an organic combination of active circuits and structures, with many elements, and it is difficult to complete the three transformations (generalization, serialization, and modularization) through induction at the power supply product level. The present invention decouples the functional design of the power supply itself from the adaptability of the system platform by extracting the common factors within the power supply products. It is relatively easy to extract common points by dividing the power supply products into the smallest functional units, which are used as the entry point for the "three transformations". Taking each element as an important indicator, the common factors of each unit power supply are extracted in a hierarchical manner to form a three-transformation power supply spectrum.

[0016] The "three transformations" of power supply products can be divided into two categories: a) Power products that comply with general standards and specifications, such as VITA62, VPX, CPCI-E, etc. The performance indicators, structural appearance, interface definition, communication protocol, etc. of such power supplies are mandatory. The variable factors mainly include platform environment adaptability and scalable custom interfaces. It is only necessary to constrain the variable factors to achieve universality on all platforms.

[0017] b) For power supply products without universal specifications, the coupling degree between such products and platforms is high, and performance indicators, structural appearance, interfaces, environmental adaptability, etc. are all variable factors. For such power supplies, it is necessary to divide them into objects, adopt the decoupling method of functionality and platform adaptability, and conduct "three-dimensional" research using the layered and graded method.

[0018] The overall decoupling idea of ​​the present invention is as follows Figure 2 As shown in the figure, the power supply products are decoupled downward into functional modules in terms of platform adaptability and product functional elements (application areas, telecommunication interfaces, structures, etc.).

[0019] like Figure 1 As shown in the figure, the functional modules of the power supply product are composed of the power module as the core, the filter module, the parallel module, and the monitoring module as auxiliary combinations. The power supply product = power module + parallel module + filter module + monitoring module. The number of power modules is ≥1, and the number of other modules is ≥0.

[0020] The power module converts the input voltage into the voltage required by the load. This power module can have single or multiple outputs. Its key factors include input voltage, output voltage, output power, number of output channels, etc.

[0021] The parallel module realizes parallel control of power conversion output and realizes power redundancy. Its key factors include the number of power supply paths, voltage level, power level, and whether current is balanced.

[0022] The filter module realizes input and output filtering, surge protection and other functions.

[0023] The monitoring module realizes the monitoring and control functions of power supply products. Its key elements include sampling paths, communication protocols, isolation capabilities, etc.

[0024] An analysis of the above functional modules revealed that not only are they highly coupled with the platform, but they also have too many functional design combinations, making it difficult to carry out the "three transformations" at this level.

[0025] In this regard, the functional design elements of the functional modules themselves (including the number of output paths, power-on timing, monitoring protocol, etc.) are decoupled downward to the smallest functional unit. Analysis shows that the functional design of this level and the platform coupling can be decoupled, and the "three transformations" can be achieved by simply standardizing the functional design of itself.

[0026] The smallest functional unit is composed of components and accessories. There are many manufacturers and models of components and accessories. Continuing to stratify the smallest unit will lead to too many models and the divergence of the three transformations. Therefore, the best intervention point of the three transformations is the smallest functional unit, forming a hierarchical division of power supply products-functional modules-smallest functional units, and promoting the three transformations step by step to functional modules and power supply products, while at the same time making regulatory constraints on components and accessories.

[0027] Based on the above decoupling results, the combination level is: minimum functional unit - functional module - power supply. The three-in-one combination design idea is as follows: Figure 3 As shown. The minimum functional unit forms a functional module through building block combination, and the functional module forms a power supply product through building block combination. Among them, the minimum functional unit includes a power unit, a filter unit, a parallel unit and a monitoring unit; the functional module includes a power module, a filter module, a parallel module and a monitoring module. The power supply product considers the application field (vehicle-mounted, recording, ship-mounted, ground-mounted, satellite-mounted, etc.), telecommunication interface (connection form, interface definition, etc.), and structural elements (structural size, cooling method, etc.).

[0028] The power supply three-dimensional design process is as follows Figure 4 As shown: It includes the following steps: Step 1: Requirements sorting and analysis: clarify requirements, analyze functional performance indicators, structural characteristics, and load characteristics; Step 2: Power supply spectrum selection: Select a power supply that meets the requirements from the existing power supply spectrum results; Step 3, decoupling analysis: If no power supply that meets the requirements is selected, the new power supply is decoupled step by step into power supply function modules and power supply minimum function units according to the component framework; Step 4: Selection of power supply function module and power supply minimum function unit type spectrum: Select the available results from the existing power supply function module type spectrum and power supply minimum function unit type spectrum; Step 5, spectrum expansion: If no functional module or minimum functional unit that meets the requirements is selected, the "three-in-one" design demonstration of the new power supply is carried out, and the "three-in-one" design and combination are considered step by step to form a new "three-in-one" result design plan to expand the spectrum of power supplies at all levels; Step 6, detailed design: carry out combination design, interface design, and structural design to form a new power supply; Step 7, Verification: Conduct simulation verification (optional) and physical verification of the new power supply; Step 8: Acceptance and storage: The new "three-in-one" power supply that has passed the verification shall apply for acceptance and identification, and be coded and stored.

[0029] Among them, the power spectrum system is as follows Figure 5 As shown. The power spectrum system includes: the power supply is decoupled into functional modules, and the functional modules include: power module, parallel module, monitoring module and filter module, where the number of power modules is ≥1 and the number of other modules is ≥0; the minimum functional unit of the power supply includes components and accessories. The minimum functional unit of the power module includes: isolated AC / DC power unit, non-isolated AC / DC power unit, isolated DC / DC power unit and non-isolated DC / DC power unit. The minimum functional unit of the filter module includes: common mode filter unit, differential mode filter unit, active filter unit and anti-surge unit. The minimum functional unit of the parallel module includes: anti-reverse injection parallel unit and current sharing parallel unit. The minimum functional unit of the monitoring module includes: sampling unit, control unit and communication unit.

[0030] The three-phase power supply design method of the present application is illustrated by taking a certain three-phase power supply requirement as an example.

[0031] The power supply is for the cabin environment, with AC input, 28V output, 900W power, ripple, power stability, load stability, and safety requirements. There is a monitoring requirement, and internal redundancy is required. It needs to pass the CE102 test, and there is an EMI filtering requirement for the input.

[0032] After checking the power supply spectrum, no power supply model can be directly borrowed.

[0033] Select the power module. No power module meets the requirement of 220VAC input 28V 32A output, so it is impossible to select directly. Further select from the minimum functional unit. In the minimum functional unit spectrum, find the model with input AC 220V and output 28V. There is a minimum functional unit with 28V 18A output.

[0034] At the same time, the power supply needs to be redundant, so two power modules are made and then connected in parallel to form a power module output.

[0035] The input of the parallel module in this power supply is 28V, and the maximum current is 32A. Check the parallel module spectrum and select a two-way input parallel module with a maximum input of 75V and a maximum current of 40A. It is suitable for this power supply.

[0036] The power supply has a single-channel output, and the monitoring module can select a single-channel CAN protocol model.

[0037] The power supply is dual redundant, and two filter modules are also required. Calculation shows that the 220VAC input current is less than 5A, and input filtering generally requires a mixture of common mode and differential mode. Check the detailed specifications of each model, and choose the model with the highest insertion loss at the power module switching frequency.

[0038] The two 28V18A output minimum functional units are combined and designed. The maximum output of the two units in parallel is 36A. Considering the derating, a 220V input 28V32A power module is formed. The two power modules are connected in parallel to achieve 1+1 redundancy.

[0039] After carrying out decoupling selection design and analyzing the requirements, it was found that this power supply has parallel requirements, monitoring requirements, and filtering requirements. Therefore, the power supply includes a power module, a filtering module, a parallel module, and a monitoring module.

[0040] Combine two 28V32A power modules with filter modules, parallel modules, and monitoring modules to complete the telecommunications design of the power supply. See the power supply combination block diagram for details. Figure 6 .

[0041] Then consider the insulation distance, wiring current, vibration intensity, heat dissipation power, etc., combine the structural parts, interfaces and other factors, interconnect the modules, connect to the outside, and form a complete power supply. The "three-dimensional" design of the power supply is completed. See the schematic diagram Figure 7 , just combine the blind-plug connector 1, the parallel module 2, the monitoring module 3, the housing 4, the filter module 5 and the power module 6.

[0042] The three-dimensional power supply design method based on decoupling and combination of the present invention adopts the method of decoupling functional modules from structural parts; decoupling the combined functional circuit into a success rate module, a monitoring module, a filtering module, and a parallel module; decoupling from platform performance, decomposing into the smallest functional unit, realizing the three-dimensionalization of cross-platform, cross-domain, and cross-system; decoupling from the number of power supply circuits, decomposing multiple outputs into a combination of multiple minimum power units; through the combination method, combining installation, interconnection, packaging and other elements, the smallest functional unit is combined into a functional module, and the functional module is combined with the structure to form a power supply. The three-dimensionalization of the power supply is no longer bound by the platform, field, and structure, and the three-dimensionalization of the layered and graded is possessed of promotion and application value.

[0043] Many specific details are described in the above description to facilitate a full understanding of the present invention. However, the above description is only a preferred embodiment of the present invention. The present invention can be implemented in many other ways different from those described herein, so the present invention is not limited to the specific implementation disclosed above. At the same time, any person familiar with the art can make many possible changes and modifications to the technical solution of the present invention using the methods and technical contents disclosed above without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the scope of protection of the technical solution of the present invention.

Claims

1. A three-phase power supply design method based on decoupling and combination, characterized by: The steps include: Step 1: Requirements sorting and analysis: clarify requirements, analyze functional performance indicators, structural characteristics, and load characteristics; Step 2: Power supply spectrum selection: Select a power supply that meets the requirements from the existing power supply spectrum results; Step 3, decoupling analysis: If no power supply that meets the requirements is selected, the new power supply is decoupled step by step into power supply function modules and power supply minimum function units according to the component framework; Step 4: Selection of power supply function module and power supply minimum function unit type spectrum: Select the available results from the existing power supply function module type spectrum and power supply minimum function unit type spectrum; Step 5, spectrum expansion: If no functional module or minimum functional unit that meets the requirements is selected, the three-dimensional design demonstration of the new power supply is carried out, and the three-dimensional design and combination are considered step by step to form a new three-dimensional design scheme, and expand the spectrum of power supplies at all levels; Step 6, detailed design: carry out combination design, interface design, and structural design to form a new power supply; Step 7: Verification: Conduct simulation verification and physical verification of the new power supply; Step 8: Acceptance and storage: The new "three-in-one" power supply that has passed the verification shall be applied for acceptance and identification, coded and stored.

2. The three-phase power supply design method based on decoupling and combination according to claim 1 is characterized in that: The power supply spectrum system includes: the power supply is decoupled into functional modules, the functional modules include: power module, parallel module, monitoring module and filter module, where the number of power modules is ≥1, and the number of other modules is ≥0; the minimum functional unit of the power supply includes components and accessories.

3. The three-phase power supply design method based on decoupling and combination according to claim 2 is characterized in that: The smallest functional units of the power module include: isolated AC / DC power unit, non-isolated AC / DC power unit, isolated DC / DC power unit and non-isolated DC / DC power unit.

4. The three-phase power supply design method based on decoupling and combination according to claim 2 is characterized in that: The minimum functional units of the filter module include: common mode filter unit, differential mode filter unit, active filter unit and anti-surge unit.

5. The three-phase power supply design method based on decoupling and combination according to claim 2 is characterized in that: The minimum functional units of the parallel module include: an anti-backflow parallel unit and a current sharing parallel unit.

6. The three-phase power supply design method based on decoupling and combination according to claim 2 is characterized in that: The smallest functional unit of the monitoring module includes: a sampling unit, a control unit and a communication unit.

Images