| 摘要 |
PURPOSE:To obtain excellent speed control performance over the entire speed control range, by detecting difference between the phase of a frequency pattern proportional to a running speed pattern and the phase of the position signal of a rolling stock, and computing and processing compensation including a proportional computation element and a differential computation element. CONSTITUTION:The relative positions of a field system 2 mounted on the rolling stock 1 and an armature coil 3 provided on the side of rails are detected by a position detecting device 4, and position signals 5 is outputted. Meanwhile, a running speed pattern generating device 9 generates the rolling stock running pattern based on a speed reference, and the frequency pattern 12 is imparted to a phase detector 13. A phase difference signal 14 is inputted into a compensation computing and processing part 41 in a current pattern forming device 15. A compensation computing parameter 42 and a computation period signal 43 and also inputted into the processing part 41. The parameter 42 is computed from an estimated period value 49. The processing part 41 performs the proportional computation and the differential computation, and wave height value 17 of the current pattern is computed. Meanwhile, a basic waveform 7 of the current pattern is formed by inputting the signal 5 and a predicted period value 56. A multiplied output 20 is supplied to the coil 3. |
