INVERTER CONTROL DEVICE, INDUCTION MOTOR CONTROL DEVICE, AND INDUCTION MOTOR SYSTEM

PROBLEM TO BE SOLVED: To provide an inverter control device that changes control constants properly and controls an induction motor further stably corresponding to a related-to-the-induction motor control constant that changes depending on operating conditions. SOLUTION: The inverter control device is used that has an inverter control device 1 and a control-parameter control device 2. The inverter control device 1 calculates voltage commands Vu*, Vv*and Vw*by control operation using control parameters based on a speed detection value ωm and current detection values Iu, Ivand Iwof the induction motor 4 and a control command τ*to the induction motor 4, and outputs the voltage commands Vu*, Vv*and Vw*to a power converting device 3 that supplies electric power to the induction motor 4. The control constant control device 2 outputs the control constant S to the inverter control device 1 based on the operating conditions of the induction motor 4. Then, the inverter control device 1 calculates the voltage commands Vu*, Vv*and Vw*with the control constant S outputted from the control constant control device 2. COPYRIGHT: (C)2004,JPO&NCIPI