| Abstract |
A PCMCIA card to be used as an optional control module is described. Integrating a fast, C-programmable floating point digital signal processor (DSP), its design as an optional
control card for existing inverters meets two major objectives: First, it represents a very flexible development tool for the real-time implementation of new control algorithms, and second, it allows to offer application-specific or high performance options with a very short
time-to-market delay. As application example, a speed-sensorless control of ac-drives is proposed. Based on the
nonlinear machine model, a 6th order Extended Kalman Filter (EKF) has been implemented to observe the motor state variables including the load torque. Both the observer and a direct
field-oriented linearizing regulatory control are programmed exclusively in C and simply recompiled with the option's card base program.
A very satisfactory overall performance has been obtained with standard (commercialized) inverters. Experimental results of 4kW and 55kW drives are discussed. |
