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Graduate Exam Abstract


HONG YAO

M.S. Final
October 22, 2012, 3:00-5:00pm
ECE conference room
MODELING AND DESIGN OF A CURRENT MODE CONTROL BOOST CONVERTER

Abstract: The boost or step up converter produces an
undesirable Right-Half Plane Zero (RHPZ) in small
signal analysis of Control to Output transfer
function. It is well known documented that boost
converter has the reputation of low-performance
and is complicated to design due to the RHPZ which
makes Voltage Mode Control (VMC) very hard to
implement. When Current Mode Control (CMC) is
applied in the topology of converter operating in
Continuous Conduction Mode (CCM), the current
feedback loop becomes unstable---the instability
is known as subharmonic oscillation. This research
presents the theoretical analysis of the origin of
the RHPZ and the modeling of a current mode
control boost converter operating in continuous
conduction mode. It details how to design the
control loop and compensation loop to maintain the
stability of the current-mode regulator. The
simulation results and experimental results are
given based on a 3.5V-5.5V VDC input, 12 VDC
output, and 1.3MHz switch frequency boost
converter design.


Adviser: Dr. George J. Collins
Co-Adviser: N/A
Non-ECE Member: Dr.Hiroshi Sakurai, Mechanical Engineering
Member 3: Dr. Tom W. Chen, ECE
Addional Members: Dr. Siddharth Suryanarayanan, ECE

Publications:
N/A


Program of Study:
ECE461
ECE512
ECE534
ECE535
ECE562
ECE569
ECE642
ECE680A2