Planar transmitter with a layered structure

• US 9,508,484 B2
• Filed: 02/18/2013
• Issued: 11/29/2016
• Est. Priority Date: 02/22/2012
• Status: Active Grant

• Current Assignee: Phoenix Contact GmbH & Company KG
• Original Assignee: Phoenix Contact GmbH & Company KG
• Inventors: Scholz, Peter-Dominik
• Primary Examiner(s): Lian, Mangtin
• Application Number:
  US14/376,189
• Publication Number:
  US 20140375411A1
• Time in Patent Office: 1,380 Days
• Field of Search: 336/200, 336/212, 336/232, 336/220, 336/221
• US Class Current: 1/1
• CPC Class Codes: H01F 2027/2809 on stacked layers
• CPC Class Codes: H01F 2027/2819 Planar transformers with printed windings, e.g. surrounded by two cores and to be mounted on printed circuit
• CPC Class Codes: H01F 27/2804 Printed windings
• CPC Class Codes: H01F 27/32 Insulating of coils, windings, or parts thereof
• CPC Class Codes: H01F 27/323 Insulation between winding turns, between winding layers

Abstract

A planar transmitter, particularly an intrinsically safe transmitter, having a layer structure having a first circuit and at least a second circuit, wherein the first circuit and the second circuit are galvanically separated from one another by means of at least one insulation layer. The transmitter has a first magnetic layer and a second magnetic layer, wherein the first magnetic layer delimits a first side of the layer structure, and the second magnetic layer delimits a second side of the layer structure, wherein the first magnetic layer 4a and the second magnetic layer are separated from one another and can be assigned to different potential groups.

Claims

1. A planar transmitter having:

a layer structure having a plurality of circuits, wherein a first circuit and at least a second circuit are galvanically separated from one another by means of at least one first insulation layer,

a magnetic core of a non-closed structure, in which a first magnetic layer and a second magnetic layer are separated from one another and are assigned to different potential groups, wherein the first magnetic layer delimits a first side of the layer structure, and the second magnetic layer delimits a second side of the layer structure,

wherein the first circuit borders on the first magnetic layer, and the second circuit borders on the second magnetic layer,

wherein at least two conductive layers form one or more windings of a coil, in that the conductive layers are connected with an electrical connection,

wherein the first circuit and the second circuit have a minimum insulation distance T0 from one another,

wherein the minimum insulation distance makes at least one of galvanic separation between the first circuit and the second circuit and, intrinsically safe galvanic separation, available,

wherein the distance between the first circuit and the second circuit does not go below the minimum insulation distance T0 at any geometrical location,

wherein a total insulation thickness between the first magnetic layer and the second magnetic layer amounts to (N−

1)×

T0, and wherein T0 is the minimum insulation distance and N is the number of circuits safely separated from one another galvanically, and

wherein, at a required minimum insulation distance T0 of the first insulation layer of about 1 mm, the total thickness of the transmitter does not amount to more than about 4 mm.

2. The transmitter according to claim 1, wherein the first circuit is disposed on a second insulation layer, and the at least second circuit is disposed on a third insulation layer, and wherein the first insulation layer is disposed between the second insulation layer and the at least third insulation layer, in each instance.

3. The transmitter according to claim 1, wherein at least one of the first circuit and the second circuit is formed from the two conductive layers and wherein a second insulating layer is disposed between the two conductive layers.

4. The transmitter according to claim 1, wherein the minimum insulation distance T0 amounts to at least about 0.25 mm.

5. The transmitter according to claim 1, wherein a total height of the transmitter does not exceed four times a total insulation distance of the insulation between a primary side, configured as the first circuit, and a secondary side, configured as the second circuit.