Proposal for faster disturbance rejection of boost DC-DC converter based on simplified current minor loop
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Date
2015-11-01
Journal Title
Journal ISSN
Volume Title
Publisher
IEEE
Abstract
Boost converters contain a right half plane (RHP)
zero. This RHP has severe limitations on the bandwidth of
controllers. Further, this RHP makes it difficult to design fast
disturbance rejection approaches, such as disturbance observers
(DOB). This paper tackles the problem of designing a DOB
based control law of the boost converter. This is done by
designing a dual loop feedback controller. The designed controller
is called current-minor-loop (CML) control. With CML, it is
possible to make a fast response of inductor current to track
reference current. Following that, the CML can be reformulated
such that the current loop is considered unity. Further, the
CML is simplified to make the boost converter minimum phase
(MP) system. The formulated control approach is validated by
simulations using PSIM software. Then, this method is verified
by experiments on a boost converter loaded with resistive load.
Description
This paper tackles the problem of designing a DOB
based control law of the boost converter. This is done by
designing a dual loop feedback controller.
Keywords
Boost DC-DC converter, Right half plane zero, Current minor loop