MULTIPLE INDUCTIVE COMPONENT

• US 20160049881A1
• Filed: 03/17/2014
• Published: 02/18/2016
• Est. Priority Date: 03/29/2013
• Status: Active Grant

• Current Assignee: Philips Lighting Holding BV (Signify N.V.)
• Original Assignee: Koninklijke Philips N.V.
• Inventors: ELFERICH, Reinhold, ACKERMANN, Bernd, JOHN, David Llewellyn
• Granted Patent: US 9,882,506 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H01F 17/045 with core of cylindric geometry and coil wound along its longitudinal axis, i.e. rod or drum core
• CPC Class Codes: H01F 17/06 with core substantially closed in itself, e.g. toroid
• CPC Class Codes: H01F 27/24 Magnetic cores
• CPC Class Codes: H01F 27/26 Fastening parts of the core together; Fastening or mounting the core on casing or support on coil H01F27/30
• CPC Class Codes: H01F 27/2823 Wires H01F27/2866 takes precedence
• CPC Class Codes: H01F 3/14 Constrictions; Gaps, e.g. air-gaps in magnetic shunt paths H01F3/12
• CPC Class Codes: H02M 1/42 Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
• CPC Class Codes: H02M 7/06 using discharge tubes without control electrode or semiconductor devices without control electrode
• CPC Class Codes: H05B 45/375 using buck topology
• CPC Class Codes: H05B 45/38 using boost topology

Abstract

A multiple inductive component (100) comprises: - a cylindrical drum core component (120) with at least two axially spaced circumferential grooves (131, 132) in its cylindrical outer surface (121), a separation disc portion (111) between said two circumferential grooves and two outer disc portions (112, 113) at the sides of the said two circumferential grooves, respectively, directed away from the separation disc portion; - at least one first winding (141) arranged in a first one (131) of said grooves; - at least one second winding (142) arranged in a second one (132) of said grooves; - a cylindrical shell core component (150) arranged coaxially around the cylindrical drum core component; - two outer air gaps (162, 163) between the cylindrical shell core component and said two outer disc portions, respectively. The separation disc portion is magnetically short circuited with the cylindrical shell core component.

Claims

1. An inductive component comprising:

a cylindrical drum core component with a cylindrical outer surface and at least two axially spaced circumferential grooves in its cylindrical outer surface, the drum core component comprising a separation disc portion between said two circumferential grooves and two outer disc portions at the sides of the said two circumferential grooves, respectively, directed away from the separation disc portion;

at least one first winding arranged in a first one of said grooves;

at least one second winding arranged in a second cone of said grooves;

a cylindrical shell core component arranged coaxially around the cylindrical drum core component;

two outer air gaps between the cylindrical shell core component and said two outer disc portions, respectively;

wherein the separation disc portion is magnetically short circuited with the cylindrical shell core component, or separated from the cylindrical shell core component by a central air gap narrower than the narrowest one of said two outer air gaps such that the at least one first winding and the at least one second winding are magnetically separated.

2. The inductive component according to claim 1, comprising an annular core component between the cylindrical shell core component and said separation disc portion of the drum core component.

3. The inductive component according to claim 1, wherein the outer diameter of said separation disc portion of the drum core component is equal to or slightly smaller than the inner diameter of the cylindrical shell core component at the axial position corresponding to the axial position of the separation disc portion.

4. The inductive component according to claim 3, wherein the outer diameter of said separation disc portion diameter is larger than the outer diameter of the smallest one of said two outer disc portions, and wherein preferably the outer diameter of said separation disc portion diameter is larger than the outer diameter of the largest one of said two outer disc portions.

5. The inductive component according to claim 3 wherein, at the axial position corresponding to the axial position of the separation disc portion, the cylindrical shell core component on its inner surface is provided with an inward annular projection.

6. The inductive component according to claim 5, wherein the inner diameter of said inward annular projection of said cylindrical shell core component is larger than the outer diameter of the smallest one of said two outer disc portions, and wherein preferably the inner diameter of said inward annular projection of said cylindrical shell core component is larger than the outer diameter of the largest one of said two outer disc portions.

7. The inductive component according to claim 1, wherein at least one of said grooves contains two or more windings.

8. The inductive component according to claim 1, further comprising at least one further groove containing one or more windings.

9. An Electronic circuit comprising a first inductive component and a second inductive component operating independently from each other, wherein this circuit comprises the inductive component of claim 1, wherein said first winding implements said first inductive component and wherein said second winding implements said second inductive component.

10. The Electronic circuit according to claim 9, wherein said first inductive component is an inductor of a power stage, or is an inductor of a filter stage, or is an inductor of a resonant stage, or is a transformer, or is a coupled inductor, and wherein said second inductive component comprises at least one of an inductor of a power stage, an inductor of a filter stage, or is an inductor of a resonant stage, a transformer, and a coupled inductor.

11. Switch-mode converter comprising at least one multiple inductive component of claim 1.

12. Switch-mode converter according to claim 11, comprising a PFC stage including a first inductor and a DC/DC stage including a second inductor operating independently from the first inductor, wherein said first winding implements said first inductor and wherein said second winding implements said second inductor.

13. LED driver comprising a switch-mode converter according to claim 11.

14. LED retrofit lamp comprising a LED driver according to claim 13.