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)