| 摘要 |
PURPOSE:To eliminate the decrease in the processing capacity of a microprocessor by storing in advance various characteristics in a memory, all digitizing a control loop and dividing and processing a calculating process into long and short period processes. CONSTITUTION:A CPU107 reads out a velocity command VCMD and a velocity feedback signal TSA through a multiplexer 104 and an A/D converter 105, and calculates a velocity deviation ER. It reads out a set value corresponding to a tarque command ER from a data table, and sets it to a frequency divider 115. A slip frequency signal fs and a velocity feedback pulse signal fv are added from the divider 115, and input through a counter 117 to the CPU107. The CPU 107 reads out a phase compensation signal theta0 from the data table in a relatively long period, calculates (omegat+theta0), further reads out a current command I and a sinusoidal function corresponding to (omegaw+theta0), and outputs a current command. |
