Inverter is a power electronic device which will convert power in DC form to AC form at the required frequency and voltage output.
Inverters can be classified into two major categories
Single phase inverters are of two types− full bridge inverter and half bridge inverter.
Half Bridge inverter is the basic building block of a full bridge inverter which consists of two switches and each of its capacitors will have a voltage output equal to . Additionally, switches will be complementing each other i.e. if one is switched ON the other will go OFF.
Full Bridge inverter circuit used to convert DC to AC and it uses the closing and opening the switches in the right sequence for the conversion. It includes four types operating states according to the closed switches.
Above two types of inverters will have two modes of conduction − 180° mode of conduction and 120° mode of conduction.
The load voltages are gives as follows;
VAN = V/3,
VBN = −2V/3,
VCN = V/3
The line voltages are given as follows;
VAB = VAN − VBN = V,
VBC = VBN − VCN = −V,
VCA = VCN − VAN = 0
While the 120° conduction mode, each device will be in a conduction state for 120°. This mode is applicable for a delta connection in a load which will result in a six-step type of waveform of its phases. So only two devices will act as a each device and each device can conduct at only 120°.
On the load, terminal A will be connected to the positive end whereas terminal B will be connected to the negative end of the source. Terminal C on the load will be in a state which is known as floating state. Additionally, phase voltages will be equal to the load voltages as shown below.
Phase voltages = Line voltages
VAB = V
VBC = −V/2
VCA = −V/2
Power Electronics Related Interview Questions
|Electronic Circuits Interview Questions||Electrical Engineering Interview Questions|
|Printed Circuit Board Design (PCB) Interview Questions||Power Plant Project Interview Questions|
|Power Transmission Interview Questions||Circuit design Interview Questions|
|Electrical Machines Interview Questions||DC motor Interview Questions|
|Induction Motors Interview Questions||Electrical Power System Interview Questions|
|Powerbuilder Interview Questions||Electric Power Generation Interview Questions|
Power Electronics Tutorial
All rights reserved © 2018 Wisdom IT Services India Pvt. Ltd
Wisdomjobs.com is one of the best job search sites in India.