Force-measuring device using electromagnetic force compensation with constant power dissipation

A force-measuring device , particularly a balance, operates on the principle of electromagnetic force-compensation. An electric coil is arranged to be movable in a magnet system . The coil has at least two windings W, W and a current supply device PB having at least two partial current sources PB, PB, the current sources each assigned to a corresponding winding. A device CU controls and/or regulates the current supplied to the windings by the partial current sources in such a way that, dependent on a force L acting on the force-measuring device, a current I, I is sent through each of the windings. The sum of the at least two electromagnetic forces which are thereby generated forms the compensation force, while, at the same time, the power dissipated by the coil always takes on a given predetermined value Ptg.