一种直流侧滤波装置及燃料电池系统
By using a distributed magnetic ring array filter device, the problems of saturation failure and high cost in traditional high-current filtering schemes are solved, achieving high-efficiency filtering performance and cost reduction, and improving the electromagnetic compatibility and space utilization of fuel cell systems.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 大连富德金煜新能源有限公司
- Filing Date
- 2025-08-26
- Publication Date
- 2026-07-17
AI Technical Summary
In traditional high-current filtering solutions, single high-current inductors suffer from saturation failure and high cost, which affect the normal operation of DC/DC converters and DC/AC inverters, leading to increased noise and larger output ripple.
A distributed magnetic ring array, comprising at least three parallel magnetic rings, is employed. Made of iron-silicon-aluminum material, its inner diameter and saturation magnetic flux density meet specific requirements. This array is used to filter out low-frequency and high-frequency AC components from the DC/DC converter, reducing interference to the DC/AC inverter. Dynamic management is achieved through temperature and Hall effect sensors.
It improves filtering performance, reduces system cost and size, and by optimizing the material and structure of the magnetic ring, it achieves effective suppression of low-frequency and high-frequency noise, thereby improving electromagnetic compatibility and space utilization.
Smart Images
Figure CN224520927U_ABST
Abstract
Claims
1. A dc side filtering device, characterized by include: Distributed magnetic ring array; The distributed magnetic ring array includes at least three parallel magnetic rings; the at least three magnetic rings are distributed circumferentially at equal intervals. The inner diameter D of the magnetic ring is ≥15mm, and the saturation magnetic flux density Bs of the magnetic ring is ≥1.0T; The inner hole of the magnetic ring is used to pass through the positive output bus and the negative output bus of the DC / DC converter (2). The positive output bus and the negative output bus of the DC / DC converter (2) are arranged in parallel, and the distance between the positive output bus and the negative output bus is δ≤2mm.
2. The dc side filtering device according to claim 1, characterized in that The number of magnetic rings is three; the three magnetic rings are arranged in an equilateral triangle.
3. The dc side filtering device according to claim 2, characterized in that The spacing L between the three magnetic rings satisfies: L≥(D_ext / 2)+10mm, where D_ext is the outer diameter of the magnetic ring.
4. The dc side filtering device according to claim 1, characterized in that The magnetic ring is made of iron-silicon-aluminum material.
5. A fuel cell system characterized by comprising: include: The fuel cell stack (1), DC / DC converter (2), DC / AC inverter (4), FCU controller (5), and DC-side filter device (3) as described in any one of claims 1 to 4; The output terminal of the fuel cell stack (1) is connected to the input terminal of the DC / DC converter (2); The DC / DC converter (2) has multiple sets of positive output buses and negative output buses; The positive and negative output bus of the DC / DC converter (2) passes through the corresponding magnetic ring inner hole and is connected to the corresponding input terminal of the DC / AC inverter (4); The output terminal of the DC / AC inverter (4) is used to connect to the load (6).
6. The fuel cell system of claim 5, wherein The inner layer of the positive output bus and the negative output bus of the DC / DC converter (2) is made of annealed copper strip and the outer layer is covered with anodized aluminum foil.
7. The fuel cell system of claim 5, wherein A temperature sensor is provided on the surface of each magnetic ring; the temperature sensor is signal-connected to the FCU controller (5).
8. The fuel cell system of claim 7, wherein A Hall sensor is installed on the DC / AC inverter (4); the Hall sensor is connected to the FCU controller (5) via a signal.
9. The fuel cell system of claim 7, wherein The FCU controller (5) is connected to the air-cooled cooler (8) via signal connection; The air outlet of the air-cooled cooler (8) faces the distributed magnetic ring array.
10. The fuel cell system of claim 5, wherein A plate heat exchanger (7) is provided between the fuel cell stack (1) and the DC / DC converter (2); The heat-absorbing end of the plate heat exchanger (7) is in contact with the DC / DC converter (2), and the heat-dissipating end of the plate heat exchanger (7) is in contact with the fuel cell stack (1).