Article2013

Nonlinear magnetic error evaluation of a two-mode watt balance experiment

32 citations0/0 files storedMetrologia

No readable copy stored yet — this record is metadata only.

No open-access location is known for this record yet.

Literature note Cite in a project Citation map

Scientific Measurement and Uncertainty Evaluation Advanced Measurement and Metrology Techniques Advanced Electrical Measurement Techniques

Abstract

The watt balance is operated in two asynchronous measurement modes to obtain the voltage–velocity ratio U / v and the force–current ratio mg / I , respectively. The magnetic flux density will change between the two modes when the effect due to the coil current is taken into account, particularly for watt balances using a soft magnetic material in the magnetic circuit. Normally, the linear component of the magnetic flux density change can be easily eliminated by reversing the coil current; however, the quadratic component remains as a systematic error, i.e. a non-linear error. In this paper, we use a theoretical analysis and a differential finite element method to investigate the behaviour of the quadratic dependence in a typical magnetic circuit. Several strategies are discussed to minimize this error in the magnetic system design for the watt balance.

Paper brief

Loading…

Cite this work

Citation unavailable for this work.

BibTeX RIS CSL-JSON

No public copy is stored for this record, so only the metadata is cited.

Citations in this library

Citation map →

Stored only when both papers are in the corpus — 32 citations exist upstream.

References

1976A Measurement of the Gyromagnetic Ratio of the Proton by the Strong Field Method 2012History and progress on accurate measurements of the Planck constant 2012Watt balance experiments for the determination of the Planck constant and the redefinition of the kilogram 2007Uncertainty Improvements of the NIST Electronic Kilogram 2011Towards the redefinition of the kilogram: a measurement of the Planck constant using the NPL Mark II watt balance 2007An initial measurement of Planck's constant using the NPL Mark II watt balance 2005The BNM Watt Balance Project 2011Determination of the Planck constant with the METAS watt balance

Cited by

2015Coils and the Electromagnet Used in the Joule Balance at the NIM 2014A nonlinearity in permanent-magnet systems used in watt balances 2017A permanent magnet system for Kibble balances 2015Progress on accurate measurement of the Planck constant: Watt balance and counting atoms 2016Designing Model and Optimization of the Permanent Magnet for Joule Balance NIM-2

Explore the map →

Papers that cite the same references — the relational fallback while embeddings are still backfilling.

Imported from OpenAlex (CC0) — nothing here is generated.