Printed circuit board-based current sensor

• US 20030137388A1
• Filed: 01/22/2002
• Published: 07/24/2003
• Est. Priority Date: 01/27/2001
• Status: Active Grant

• Current Assignee: Phoenix Contact GmbH & Company KG
• Original Assignee: Phoenix Contact GmbH & Company KG
• Inventors: Eisert, Klaus, Leifer, Christoph, Brand, Klaus, Meier, Heinz W.
• Granted Patent: US 6,731,193 B2
• Time in Patent Office: Days
• US Class Current: 336/225
• CPC Class Codes: G01R 15/181 using coils without a magnetic core, e.g. Rogowski coils
• CPC Class Codes: G01R 15/186 using current transformers with a core consisting of two or more parts, e.g. clamp-on type G01R15/142 - G01R15/16 take precedence; tong testers G01R1/22

Abstract

The object of the invention is to provide a slotted current acquisition coil according to the Rogowski principle in which the printed circuit board base of the measuring coil can be opened to insert an electrical conductor to be measured without having to interrupt the latter. To this end, the two printed circuit board segments linked together by a hinge are opened. Twisting a single-piece printed circuit board also opens the arrangement for inserting the conductor to be measured.

Claims

1. A current acquisition coil according to the Rogowski principle with printed conductors (22, 23, 24, 25), whose configuration yields a coil winding (20, 21), and whose printed conductor ends are connected with each other by through platings (26, 27, 28, 29) on the printed circuit board (1, 10), characterized in that the current acquisition coil is open on at least one side, thereby generating a gap (7) that can be opened and then closed again.

2. A current acquisition coil according to claim 1, characterized in that the structure of the coil consists of two annular printed circuit board segments (1, 10), which are each connected with each other on one side by a hinge (6).

3. A current acquisition coil according to claim 1 or 2, characterized in that the printed conductor ends (13) of the coil winding on the first printed circuit board segment (1) are connected by means of flexible conductors (12) with the printed conductor ends (13) of the coil winding on the second printed circuit board segment (10).

4. A current acquisition coil according to claim 1, characterized in that the structure of the coil consists of a single-piece, slit and twistable printed circuit board segment (1).

5. A current acquisition coil according to one of the preceding claims, characterized in that the printed circuit board (1, or 1 and 10) of the current acquisition coil is built around several layers.

6. A current acquisition coil according to claim 5, characterized in that two layers are provided for the printed conductors of the incoming winding (22, 22a, 23, 23a), and two additional layers are provided for the printed conductors of the returning winding (24, 24a, 25, 25a).

7. A current acquisition coil according to one of the preceding claims, characterized in that the components for an electronic circuit (19) are arranged on the printed circuit board (1).

8. A current acquisition coil according to the Rogowski principle with printed conductors (22, 23, 24, 25), whose arrangement yields a coil winding (20, 21), and whose printed conductor ends are connected with each other by through platings (26, 27, 28, 29) on the printed circuit board (1, 10), characterized in that the printed circuit board for the conductor to be measured accommodates electrical terminals (56), which are connected with each other via printed conductors (52, 54) and at least one through plating (53) in an axial direction in the center of the coil.

9. A current acquisition coil according to claim 8, characterized in that the printed circuit board (1, or 1 and 10) of the current acquisition coil is built around several layers.

10. A current acquisition coil according to claim 9, characterized in that two layers are provided for the printed conductors of the incoming winding (22, 22a, 23, 23a), and two additional layers are provided for the printed conductors of the returning winding (24, 24a, 25, 25a).

11. A current acquisition coil according to one of the claims 8 to 10, characterized in that the components for an electronic circuit (19) are arranged on the printed circuit board (1).