| 摘要 |
PURPOSE:To obtain a speed signal having good quick responsiveness without time delay by the simple method of adding and synthesizing the differentiated signals of the differential angular frequency signal from a resolver. CONSTITUTION:Triangular waves having a 90 deg. difference synchronized with an excitation signal are formed by triangular wave forming circuits 5, 6, and are converted to parabolic waveforms by integration circuits 8, 9. On the other hand, the square wave synchronized with the output from a resolver is outputted from a square wave converting circuit 7 and the parabolic waveforms are subjected to sample holding by sample holding circuits 10, 11 at the rise or fall timing of said wave, by which the sampling holding waveforms are formed. The sample holding waveforms are shaped at step parts by filters 12, 13 and are converted to the parabolic waveform of the differential angular frequency between the resolver excitation and the output. The waveforms are further passed through differentiation circuits 14, 15, by which the waveforms are converted to the triangular waves having the amplitude coinciding with the differential angular frequency. The triangular waves are rectified with rectifier circuits 16, 17 and are added and synthesized by an adder circuit 18, from which the linear speed signal is outputted. |
