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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