Post on 25-Sep-2015
description
SWITCH MODE DC-ACINVERTERS
Kelompok 1:
AUDREY FUADI (1110952011) ILHAM WARIO (1110952045) DIVA SEPTIAN JONES (1110952049) LULUT ABINAWAN R (1110953007) RICO AFRINANDO (1110953009)
Kelompok 1:
AUDREY FUADI (1110952011) ILHAM WARIO (1110952045) DIVA SEPTIAN JONES (1110952049) LULUT ABINAWAN R (1110953007) RICO AFRINANDO (1110953009)
Switch-Mode DC-AC Inverter
Switch-Mode DC-AC Inverter
Block diagram of a motor drive where the power flow can be bi-directional
Switch-Mode DC-AC Inverter
Four quadrants of operation
Half-bridge DC-AC Inverter
Half-bridge inverter
(One leg of full bridge converter)
1. Capacitor provides the mid point
2. The transistors TA+ and TA- are switched
using pulse-width-modulation (PWM).
Synthesis of a Sinusoidal Output byPWM
Harmonics in the DC-AC Inverter OutputVoltage
Square-Wave Mode ofOperation
hV
V
VV
AohAo
dAo
1
1
24
Single-Phase Full-Bridge DC-AC Inverter
1. No need for capacitor mid-point.
2. The output voltage now switches between +Vd andVd
PWM to Synthesize SinusoidalOutput: Bipolar Switching
Analysis with Ideal Filters
PWM Unipolar VoltageSwitching
Sinusoidal Synthesis byVoltage Shift (Modified Square
Wave)
Fundamental and Ripple inInverter Output
Push-Pull Inverter (requirestransformer with center tap)