auto power supply control from 4 different sources

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ELECTRICAL PROJECTS

Auto Power Supply Control From 4 Different Sources

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Abstract Introduction Working Process Circuit Description Advantages Disadvantages Conclusion

Overview:







The aim of project is to provide uninterrupted power supply to A load

By selecting the supply from any source out of 4 such as mains, generator, inverter and solar automatically in the absence of any of the source.

In this project uses four switches to demonstrate the respective failure of that power supply.

When any of the switches is pressed it shows the absence of that particular source, switches are connected to microcontroller as input signals.

Abstract:







Introduction:

The demand for electricity is increasing every day and frequent power cuts is causing many problems in various areas like industries, hospitals and houses.

The project can be further enhanced by using other source like wind power







Block Diagram:







Working Process:

The project is selection of supply from mains, generator, and inverter and solar automatically by using microcontroller concept.

As it is not feasible to provide all 4 different sources of supply, one source with alternate switches are provided to get the same function.

In this project we are having 4 switches which we consider as 4 different source of supply. When we press any of the switches it shows the absence of that particular source which is connected to microcontroller as input signals.







Working Process:(Continue…)

Here we are using 8051 family microcontroller. The output of microcontroller is given to the ULN2003 this acts as A relay driver.

This can drive up to 7 relays. The relays which are used hear are 12V relay. The output can be observed using lamp which is getting uninterrupted power supply from other means if main supply is cut off.

The power supply consists of a step down transformer 230/12v, which steps down the voltage to 12v ac.







Hardware Components:

Bridge rectifier Voltage regulator Embedded systems Micro controller Relay Relay driver ULN2003







Bridge Rectifier:

A diode bridge is an arrangement of four diodes in A bridge circuit configuration that provides the same polarity of output for either polarity of input.

It convers of an alternating current (ac) input into a direct current (dc) output, it is known as a bridge rectifier.

A bridge rectifier provides full-wave rectification from a two-wire ac input, resulting in lower cost and weight as compared to a rectifier with a 3-wire input from a transformer with a center-tapped secondary winding.







Voltage Regulator:

A voltage regulator is designed to automatically maintain A constant voltage level, it may be A simple "feed-forward" design or may include negative feedback control loops.

It may use an electromechanical mechanism or electronic components, it will depends on the design, it may be used to regulate one or more ac or dc voltages.

Electronic voltage regulators are found in devices such as computer power supplies where they stabilize the dc voltages used by the processor and other elements.







Embedded Systems:

A combination of hardware and software which together form A component of A larger machine.

An example of an embedded system is a microprocessor that controls an automobile engine.

An embedded system is designed to run on its own without human intervention, and may be required to respond to events in real time.







Embedded Systems:







Micro Controller:

Compatible with MCS®-51 products

8K bytes of in-system programmable (ISP) flash memory

4.0V to 5.5V operating range

Crystal frequency 11.0592mhz

Three-level program memory lock

256 x 8-bit internal RAM

32 programmable I/O linesAT89S52







It is A electro magnetic switch

Used to control the electrical devices

Copper core magnetic flux plays main role here

Relay:







Relay Driver ULN2003:

ULN is relay driver application

The ULN2003 is A monolithic high voltage and high current

darlington transistor arrays.

It consists of seven NPN darlington pairs that features high-voltage

outputs with common-cathode clamp diode for switching inductive

loads.

The collector-current rating of a single darlington pair is 500ma.

The darlington pairs may be paralleled for higher current capability.







Relay Driver Uln2003:(continue…)

The ULN functions as an inverter.

If the logic at input 1b is high then the

output at its corresponding pin 1c will be

low.







Circuit Diagram:







Circuit description:

The circuit diagram of A simple 100 watt inverter using IC CD4047 and MOSFET IRF540

Cd4047 is a low power CMOS astable multivibrator ic

Here it is wired as an astable multivibrator producing two pulse trains of 0.01s which are 180 degree out of phase at the pins 10 and 11 of the IC.







Advantages:

Power supply can be controlled

Disadvantages:

High cost

Difficult to install and maintain







The project can be further enhanced by using other sources like wind power also and then taking into consideration for using the best possible power whose tariff remains lowest at that moment.

In Auto Power Supply Control Project we use 4 different sources like mains, generator, inverter and solar.

Conclusion:

http://www.edgefxkits.com/auto-power-supply-control-from-4-different-sources-solar-mains-generator-inverter-to-ensure-no-break-power





auto power supply control from 4 different sources

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