| 摘要 |
PURPOSE:To smoothly accelerate or decelerate even in a high speed rotation range by varying the output voltage frequency of an inverter under digital control. CONSTITUTION:Setters 11-15 for setting a target frequency of the output voltage of an inverter 5 corresponding to a target rotating speed, the primary and secondary resonance frequencies, increased or decreased frequency values at the normal acceleration or deceleration time, and the increased or decreased frequency value at the primary or secondary resonance band passing time are provided in a set panel 1. Pushbutton switches 16, 17 for starting and stopping the operation, and set alternation switch 18 for altering the set values by the setters 10- 15 are provided in the panel 1. Further, a controller 2 for sequentially varying the output voltage frequency of the inverter 5 for driving a motor M is provided. The controller 2 has microcomputers 20, a ROM21, a RAM22, a panel interface 23 and an inverter interface 24. |
