Sequential design of hysteresis current controller for three-phaseinverter
Tilli, A.; Tonielli, A.
Industrial Electronics, IEEE Transactions on
Volume 45, Issue 5, Oct 1998 Page(s):771 - 781
Digital Object Identifier 10.1109/41.720334
Summary:In this paper, a novel multivariable hysteresis current controller
for three-phase inverters is presented. Hysteresis controllers are
intrinsically robust to system parameters, exhibit very high dynamics,
and are suitable for simple implementation. The main drawback of the
hysteresis controller is a limited control on transistors' switching
frequency. Very high switching frequency may result if three independent
controllers are used. Multivariable solutions were proposed in the
literature to solve the problem. In this paper, it is shown how the use
of a sequential design for the multivariable controller can further
contribute to transistors' switching frequency reduction, with no
significant increase in the hardware implementation complexity. The
proposed controller is illustrated and compared with other hysteresis
controllers presented in the literature. It ensures a significant
reduction of transistors' switching frequency with respect to the other
tested controllers, under the same operating conditions. A prototype
controller is also presented. The effects of noise captured by current
sensors (especially Hall-effect type) on the performance of industrial
hysteresis controllers are discussed. It is shown how the sequential
design of the controller can also help in solving this critical problem.
Experimental results are reported to confirm the quality of the proposed
controller. The system stability condition is derived in an appendix
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