POSITION SIGNAL GENERATING APPARATUS

摘要

PURPOSE:To obtain with a simple set-up an accurate magnetic exciting voltage of frequency and phase difference by obtaining a magnetic exciting voltage of a resolver from a counter output signal by division of a reference frequency oscillator output. CONSTITUTION:A counter 22, by obtaining a divided output on every digit as with a shaping output pulse of a quartz oscillator 21 as a counting input, applies the highest ranked digit output J as a magnetic exciting voltage on one side of a resolver 23. Form this output J, an inversing signal of output of lower range by one digit is introduced into FF2A and its output K is applied to the resolver 23 as a magnetic exciting voltage of the resolver on the other side. The voltages J, K are of the same frequency and of a 50% duty ratio and a magnetic exciting voltage of accurate frequency and phase difference can be obtained when they become of pulses including a mutual phase difference of 90 deg..