Realization of a Microtorque Standard by Using an Electromagnetic Force Type Torque Standard Machine

Atsuhiro Nishino

Abstract

In order to realize a microtorque standard, we investigated the principle of a torque generating method using an electromagnetic force by referring to watt balance experiments for the redefinition of the kilogram. Then, we have developed an electromagnetic force type torque standard machine (EMTSM), and the SI traceable torque was successfully realized for the first time using a method which does not refer to the gravitational force. In this study, we studied on the realization of torque less than 1 mN·m based on this principle. As a result, torque down to 0.3 µN·m was successful realized by using a highly accurate programmable voltage/current source.

Keywords

torque, torque standard, microtorque, watt balance, electromagnetic force

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IMEKO-TC3-2017-059.pdf

DOI

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IMEKO TC

TC3 - Measurement of Force, Mass, Torque, and Gravity

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