Title:
【発明の名称】直流電流再生方法及びこの方法を実施するための直流電流変換器
Document Type and Number:
Japanese Patent JP2002525608
Kind Code:
A
Abstract:
The circuit contains a primary coil on the core ( 2 ) of a magnetic circuit with an air gap and switchable into a line carrying the measurement current. A secondary compensation coil ( 5 ), with an order higher winding count and mounted on the core, is connected to the output of a controllable compensation current source ( 6 ). The output of a Hall element ( 11 ) in the air gap is connected to the control input of the compensation source. A further coil ( 14 ) on the core is connected to an additional controllable current generator ( 15 ) whose control input ( 16 ) is driven by a measurement device ( 13 ) for the compensation current via a control and evaluation circuit ( 17 ). USE/ADVANTAGE-Measuring a.c. and d.c. Can be produced at low cost and all drift occurring during measurement can be compensated.
Inventors:
Baumgartel, Ulrich
Rail, wolfgang
Franke, Henry
Hochgraef, Holger
Rail, wolfgang
Franke, Henry
Hochgraef, Holger
Application Number:
JP2000571273A
Publication Date:
August 13, 2002
Filing Date:
September 22, 1999
Export Citation:
Assignee:
Siemens Aktiengesellschaft
International Classes:
G01R15/20; G01R15/18; (IPC1-7): G01R15/20
Attorney, Agent or Firm:
Iwao Yamaguchi