| Abstract |
This paper presents a real-time performance testing of a three-phase (3φ) voltage-source (VS) six-pulse
wavelet-modulated (WM) inverter-fed induction motor (IM). The proposed modulation technique is
based on a set of three scale-based linearly-combined scaling functions shifted by 2Ï€
3 â—¦ from each other.
These scaling functions are employed to sample three reference-modulating signals, each corresponds
to one phase, in a non-uniform recurrent manner. Moreover, these scaling functions have dual synthesis
scaling functions that are responsible for reconstructing the three continuous-time (CT) referencemodulating
signals from their non-uniform recurrent samples. The reconstruction processes are carried
out by the three synthesis scaling functions to achieve 180-degrees conduction mode of the 3φ six-pulse
inverter. The proposed wavelet modulation technique is realized through a Turbo−C code that is executed
by a dSPACE ds1102 DSP board to generate switching pulses to activate the inverter six IGBT
switches. The IGBT inverter supplies a 1 hp, 1750 RPM, 208 V, 60 Hz, Y-connected 3φ squirrel-cage
induction motor that is tested for several speeds. These test results demonstrate robust performance,
simple implementation, significant dynamic responses and high ability to maintain high quality outputs. |
