| Abstract |
Control design in the field of motor driving or traction, needs an accurate model of the converter
behavior, but with a reasonable simulation cost. Moreover compared to nowadays practice, an
important improvement may come with the use of non-linear averaged models, including an image of
the converter non-linearities, like delays with respect to the driving, or the power losses. This paper
presents an experience of a non-linear averaged model of a three phase static inverter which takes into
account the non-linearities of semiconductor devices and topological parasitic components. A
comparison between simulation and experimental results enables to discuss the validity of the
proposed averaged model. Then an application of the non-linear averaged model is described in the
field of current distortion compensation, on a 30kW workbench. Particularly, it is shown that it is
reasonably possible to take care of the dead-time at the driving level instead as in the control loop
itself. Our global approach renders possible to yield automatically an analytical averaged model of
any static converter. Yet the analytical model may be used efficiently in control design, for example
to improve on-line control quality. |
