TY  - CHAP
U1  - Konferenzveröffentlichung
A1  - Quenzer-Hohmuth, Samuel
A1  - Ritzmann, Steffen
A1  - Rosahl, Thoralf
A1  - Wicht, Bernhard
T1  - ΔV/Δt-intervention control concept for improved transient response in digitally controlled boost converters
T2  - APEC 2018 : thirty-third Annual IEEE Applied Power Electronics Conference and Exposition : March 4-8, 2018, San Antonio, Texas
N2  - Boost converters suffer from a bandwidth limitation caused by the right-half plane zero (RHPZ), which occurs in the control-to-output transfer function. In contrast, there are many applications that require superior dynamic behavior. Further, size and cost of boost converter systems can be minimized by reduced voltage deviations and fast transient responses in case of large signal load transients. The key idea of the proposed ΔV/Δt-intervention control concept is to adapt the controller output to its new steady state value immediately after a load transient by prediction from known parameters. The concept is implemented in a digital control circuit, consisting of an ASIC in a 110 nm-technology and a Xilinx Spartan-6 field programmable gate array (FPGA). In a boost converter with 3.5V input voltage, 6.3V output voltage, 1.2A load, and 500 kHz switching frequency, the output voltage deviations are 2.8x smaller, scaling down the output capacitor value by the same factor. The recovery times are 2.4x shorter in case of large signal load transients with the proposed concept. The control is widely applicable, as it supports constant switching frequencies and allows for duty cycle and inductor current limitations. It also shows various advantages compared to conventional control and to selected adaptive control concepts.
Y1  - 2018
SN  - 978-1-5386-1180-7
SB  - 978-1-5386-1180-7
U6  - https://doi.org/10.1109/APEC.2018.8341029
DO  - https://doi.org/10.1109/APEC.2018.8341029
SP  - 316
EP  - 322
S1  - 7
PB  - IEEE
CY  - Piscataway, NJ
ER  -