WATER BOTTLING PLANT



http://www.youtube.com/watch?v=vpXSHUbD0ig

Q:Why Human body feel Electric shock ? n in an Electric train during running , We didnt feel any Shock ? why?

A:Unfortunately our body is a pretty good conductor of electricity, The golden rule is Current takes the lowest resistant path if you have insulation to our feet as the circuit is not complete (wearing rubber footwear which doing some repairs is advisable as our footwear is a high resistance path not much current flows through our body).The electric train is well insulated from its electrical system.

About Diode

An Ideal Diode should have Zero resistance in the forward bias and an infinitely large resistance in reverse bias.

OSCILLOSCOPE

Oscilloscope is widely used for measurement of time-varying signals. Any time you have a signal that varies with time - slowly or quickly - you can use an oscilloscope to measure it - to look at it, and to find any unexpected features in it

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STEPPER MOTOR

Stepper motor is the electrical machine which act upon input pulse applied to it. it is one type of synchronous motor which runs in steps in either direction instead of running in complete cycle.so, in automation parts it is used.

What is Flip Flop:

A bistable multivibrator. A circuit which has two output states and is switched from one to the other by means of an external signal (trigger).

How to Design Heat sink for IGBT?

Any fined aluminum extrusion with a flat smooth surface can be used then your IGBT is mounted on it with a layer of silicon grease in-between, but remember the mounting surface is also your collector, if your heat sink is going to touch other metal parts it is beter to electrically insulate the IGBT with a silicon insulator strip and insulating sleeves for the mounting screws, then the heat sink can be mounted on a box that is fitted with a cooling fan with the fins inside the box, else it can be mounted open with the fins in a vertical position for natural airflow over the fins