Measurement of the rate of change in switched reluctance machines

摘要

A coil is fabricated as two or more tracks 42, 43 of a printed circuit board and arranged close to a conductor 50 to measure the rate of change of current in the conductor. Each turn of the coil is displaced from its neighbouring turn in a direction parallel to the direction of the conductor. The output from the coil may be used to provide a detection signal for a position detection scheme in a switched reluctance drive.