| Abstract |
The dynamic performance of a drive with induction machine fed via a pulse width modulated current
source converter is investigated. The goal is to obtain a high dynamic performance of the drive. Therefore,
suitable control methods are selected. These are the state feedback control on the line side, the
field oriented control at the machine side and basic PI control for the dc link. The converter is controlled
by means of space vector modulation with high pulse frequencies. Compared to other strategies
a dc link reactor with relatively small inductivity is used to achieve fast control, while also minimizing
weight and costs. Furthermore, the overall strategy aims to reduce the on-state losses in the power
semiconductor modules by keeping the dc link current to a minimum level. The basic control performance
in the dc link depending on the inductivity in the dc link is analysed. The dynamic performance
of the drive when applying all these methods is investigated by means of simulations of a 20 kW
and measurements of a 7,5 kW test drive. Thus, a torque step response time approaching that of PWM
voltage source converter induction machine drives has been achieved. |
