| 摘要 |
PURPOSE:To make processing very fast and to improve responsiveness, by providing a memory part in which control data is stored, comparing a sample value data of a preset input, a detected rotary speed value, a detected current value, and the like with read control data, thereby performing the control. CONSTITUTION:A control circuit part 6 processes comparing computation based on the counted number from a pulse pickup which detects the number of rotation of the DC motor as pulses and the detected current value of three phase AC 1, generates gate pulses at specified timing, and controls the DC motor through a thyristor converter. A CPU 62 is operated by the output of a clock oscillating circuit 61 and provided with an ROM 63 enclosing system programs and tables and an RAM 64 storing system parameters. Required preset values are inputted in an input output circuit 68b. The sampled number of rotation and current are converted 70 from a frequency to a voltage and converted 71 from analog to digital values, and results are imparted. The CPU 62 processes comparing computation and outputs gate pulses through an input output circuit 68c at the specified timing. |
