Fast and reliable commissioning of AC variable speed drives by self-commissioning

Self-commissioning is a novel feature of modern inverter-fed induction-motor drives. It is part of the software of the control system and controls the sequence of commissioning, determines the electrical and mechanical parameters of the drive, and sets the control parameters and controller coefficients accordingly. Faults in the control system, the inverter, or the motor are detected and monitored as early as possible. The electrical parameters are determined at standstill. During the first acceleration the speed controller is adjusted by a method independent of the torque-speed characteristic of the drive. Stable operation is obtained even in the case of torsionally flexible coupling. The self-commissioning program adjusts the control system fast, reliably, and accurately with no need for specially trained commissioning engineers or additional measuring equipment.<>