| 摘要 |
<p>PURPOSE:To eliminate a speed ripple, an undershoot, and overshoot and to enhance the responsiveness of an inverter device by applying the optimum speed loop constant in response to the operating states. CONSTITUTION:A software is calculated from a CPU23, input/output interface 24, a converter voltage command by the CPU23, and a converter voltage feedback by an A/D converter 22. Thus, a converter controller 25 for delivering a converter firing angle command, a speed command input from input/output interface 24, and a speed input interface 26 for delivering a speed command on the basis of the speed feedback from a speed detector 8 are provided, and the CPU23 transfers frequency command data to the interface 26. Then, the optimum operation of P operation, PI operation and PID operation is selected in response to the control range, thereby controlling to switch.</p> |
