Abstract

Unwanted coil motions in watt and joule balances will introduce additional measurement uncertainty and systematic biases. In this summary, an active magnetic damping device is designed to suppress undesired coil motions, e.g., horizontal displacement and rational tilt. A merit of the designed damping device is that it can be used during the dynamic measurement mode of watt and joule balances. The initial analysis shows that the presented device can damp or control five degrees of freedom of the coil motion.

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