Introducing Simple low power Inverter

Guided By:- Submitted By:-Abhirup Sir Sarthak Jain

Paresh Sahare Shailendra Sirohi Yogendra Yaduwanshi

Content

Introduction

Component Used

Circuit Diagram

Circuit Description

Advantages

Disadvantage

Applications

Introduction The word ‘inverter’ in the context of power-

electronics denotes a class of power conversion (or power conditioning) circuits that operates from a dc voltage source or a dc current source and converts it into ac voltage or current. The ‘inverter’ does reverse of what ac-to-dc ‘converter’ does (refer to ac to dc converters). Even though input to an inverter circuit is a dc source, it is not uncommon to have this dc derived from an ac source such as utility ac supply. Thus, for example, the primary source of input power may be utility ac voltage supply that is ‘converted’ to dc by an ac to dc converter and then ‘inverted’ back to ac using an inverter. Here, the final ac output may be of a different frequency and magnitude than the input ac of the utility supply.

Component Used

IC HCF4047

IC ULN2004

Capacitor & Resistor

Relay & Voltage Regulator

Transformer

IC HCF4047

HCF 4047

IC ULN2004

ULN

2004

Capacitor & Resistors

CAPACITOR RESISTOR

1) 0.1 µ farad 1) 470Ω R1 and R22) 33Ω R3 and R43) 200k VR1

RELAY

1) 12 volt

VOLTAGE REGULATOR

1) 12 volt

Transformer

1 Transformer X1 (9V-0-9V, 500mA secondary)

Circuit Diagram

Circuit Description Here is a simple low-power inverter that

converts 12V DC into 230-250V AC. It can be used to power very light loads like window chargers and night lamps, or simply give shock to keep the intruders away. The circuit is built around just two ICs, namely, IC CD4047 and IC ULN2004.

IC CD4047 (IC1) is a monostable/astable multivibrator. It is wired in astable mode and produces symmetrical pulses of 50 to 400 Hz, which are given to IC2 via resistors R1 and R2.

Circuit Description IC ULN2004 (IC2) is a popular 7-channel

Darlington array IC. Here, the three Darlington stages are paralleled to amplify the frequencies received from IC1. The output of IC2 is fed to transformer X1 via resistors R3 and R4.

Transformer X1 (9V-0-9V, 500mA secondary) is an ordinary step-down transformer that is used here for the reverse function, i.e., step up. That means it produces a high voltage. Resistors R3 and R4 are used to limit the output current from the ULN to safe values. The 230-250V AC output is available across the high-impedance winding of the transformer’s primary windings.

Advantages

1) It provides quality power output.2) It is lighter and smaller in size, and

hence can be easily transported.3) It’s noise-free in functioning when

compared to traditional generators.4) Requires less maintenance.5) Higher efficiencies as each panel/pair of

panels is managed individually.

Disadvantage

1) There are no large capacity generators in the markets.

2) The Inverter can power a few appliances for a short period.

3) More individual hardware pieces that can fail

Application

1) DC power source utilization.2) Uninterruptible power supplies.3) Electroshock weapons.4) HVDC power transmission.5) Inverters can be very helpful during

power cuts.

THANKS