DC filter inductor and method of making the same

A technology of DC filtering and manufacturing method, which is applied in the field of inductors, can solve problems such as inconvenience, and achieve the effect of reducing AC loss and facilitating detection

Active Publication Date: 2017-03-29
DELTA ELECTRONICS (SHANGHAI) CO LTD
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] This shows that above-mentioned existing inductor obviously still has inconvenience and defective, and needs to be further improved
In order to solve the above problems, related fields have tried their best to find a solution, but no applicable method has been developed for a long time.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • DC filter inductor and method of making the same
  • DC filter inductor and method of making the same
  • DC filter inductor and method of making the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0085] In order to make the technical content disclosed in this application more detailed and complete, reference may be made to the drawings and the following various specific embodiments of the present invention, and the same symbols in the drawings represent the same or similar components. However, those skilled in the art should understand that the examples provided below are not intended to limit the scope of the present invention. In addition, the drawings are only for schematic illustration and are not drawn according to their original scale.

[0086] In this application, the description involving "coupled with" may generally refer to a component being indirectly connected to another component through other components, or a component is directly connected to another component without going through other components. components.

[0087] In this application, "a" and "the" can generally refer to a single or a plurality, unless the article is specifically limited in the co...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention provides a DC filter inductor and a manufacturing method thereof. The DC filter inductor includes a magnetic core, at least one first winding and at least one second winding, the magnetic core has at least one air gap, the first winding and the second winding are connected in parallel with each other and coil around the magnetic core respectively, wherein the inductance of the first winding The difference between the inductance and the mutual inductance of the first and second windings is smaller than the difference between the inductance and the mutual inductance of the second winding, the DC resistance of the first winding is greater than the DC resistance of the second winding, and the first winding is larger than the second winding close to the air gap. With the present invention, two independent inductance windings wound on the same magnetic column are connected in parallel, and the AC and DC currents of the windings are separated through coupling, which can reduce the AC loss of the windings, improve the magnetic flux distribution near the air gap, and reduce the influence of electromagnetic interference .

Description

technical field [0001] The invention relates to an inductor, in particular to a DC filter inductor and a manufacturing method thereof. Background technique [0002] In the case of DC-DC switching power conversion, the switching frequency is more than tens of kHz, and the filter inductor often includes two parts, one is DC current, and the other is high-frequency AC ripple current. In the case of AC-DC switching power conversion, such as an active PFC circuit, the current of the filter inductor is also a low-frequency (<400Hz) AC current (compared to the switching frequency, it can be regarded as a DC current), and the other part is a high-frequency AC ripple. current. Since the inductor contains both DC component current and AC ripple current, this type of inductor is collectively referred to as "DC filter inductor". [0003] The DC current of the DC filter inductor will form a large DC magnetic potential on the magnetic circuit. For inductors made of high magnetic per...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): H01F17/04H01F27/28H01F27/30H01F27/24H01F41/00
CPCH01F3/14H01F27/28H01F27/38
Inventor 卢增艺
Owner DELTA ELECTRONICS (SHANGHAI) CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap