# US 5,703,462 A · Inductive coupler assembly having its primary winding formed in a printed wiring board

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- Number: US 5,703,462 A
- Document ID: US5703462A
- Status: Granted
- Kind: A
- Application number: 08/679,587
- Filed: 1996-07-15
- Granted: 1997-12-30
- Earliest claimed: 1996-07-15
- Assignees: Delco Electronics Corporation
- Inventors: George R. Woody; Scott D. Downer
- Web page: https://patentgrep.com/patent/US5703462A

## CPC

- H01F 38/14: Inductive couplings
- Y10S 336/02: Separable
- H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

## Abstract

An inductive coupler having an antenna and primary winding formed as part of a single structure that can be readily and consistently produced using printed wiring board manufacturing techniques. The coupler has the primary winding and antenna are formed as part of a printed wiring board. A coupler housing having two mating coupler halves secures a center magnetic core and the printed wiring board therebetween. The coupler housing also secures a cable that is coupled between selected printed circuit layers of the primary winding and a power source for coupling energy to the charging coupler.

## Claims

### Claim 1

An inductive charging coupler for use with inductive charging apparatus comprising a power source and a charge port disposed in an electric vehicle that is coupled to a battery of the electric vehicle, and wherein the coupler is insertable into the charge port to couple power from the power source to charge the battery of the electric vehicle, said coupler comprising:
a center magnetic core;
a printed wiring board disposed around the center magnetic core that comprises a plurality of printed circuit layers that each have a predetermined printed circuit pattern that together form a primary winding, and an antenna formed as an electrical trace on a selected one of said printed circuit layers;
a cable coupled between selected printed circuit layers of the primary winding and a power source for coupling energy to the charging coupler 20; and
a coupler housing that has two mating coupler halves that are configured to provide a handle, and wherein the mating coupler halves enclose the printed wiring board, secure the center magnetic core, and secure the cable in the handle.

### Claim 2 (depends on 1)

The inductive charging coupler of claim 1 wherein said cable includes a coaxial communications cable coupled to said antenna to couple communications signals between said power source and said charge port.

### Claim 3

An inductive charging coupler for use with inductive charging apparatus comprising a power source and a charge port disposed in an electric vehicle that is coupled to a battery of the electric vehicle, and wherein the coupler is insertable into the charge port to couple power from the power source to charge the battery of the electric vehicle, said coupler comprising:
a center magnetic core;
a printed wiring board disposed around the center magnetic core that comprises a plurality of printed circuit layers that each have a predetermined printed circuit pattern that together form a primary winding;
a cable coupled between selected printed circuit layers of the primary winding and a power source for coupling energy to the charging coupler 20;
a coupler housing that has two mating coupler halves that are configured to provide a handle, and wherein the mating coupler halves enclose the printed wiring board, secure the center magnetic core, and secure the cable in the handle; and
a plurality of grounding clips disposed in the handle that engage outer shielding of the cable.

### Claim 4 (depends on 3)

The inductive charging coupler of claim 3 wherein the grounding clips are comprised of tinned copper.

### Claim 5

An inductive charging coupler for use with inductive charging apparatus comprising a power source and a charge port disposed in an electric vehicle that is coupled to a battery of the electric vehicle, and wherein the coupler is insertable into the charge port to couple power from the power source to charge the battery of the electric vehicle, said coupler comprising:
a center magnetic core;
a printed wiring board disposed around the center magnetic core that comprises a plurality of printed circuit layers that each have a predetermined printed circuit pattern that together form a primary winding;
a cable coupled between selected printed circuit layers of the primary winding and a power source for coupling energy to the charging coupler 20;
a coupler housing that has two mating coupler halves that are configured to provide a handle, and wherein the mating coupler halves enclose the printed wiring board, secure the center magnetic core, and secure the cable in the handle, the mating coupler halves having molded spring fingers formed thereon for holding the center magnetic core in the coupler housing.