Industrial Electronics

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Power MOSFET

Power MOSFET SymbolThe power Metal Oxide Semiconductor Field Effect Transistor (MOSFET) is a device derived from the field effect transistor (FET) for use as a fast acting switch at power levels. MOSFET is a voltage controlled device.

IGBT - Insulated Gate Bipolar Transistor

IGBT Construction & symbol The insulated gate bipolar transistor (IGBT) is a device which combines the fast acting features and high power capability of the bipolar transistor

Power transistor

Power Transistor SymbolThe bipolar power transistor is a three layer NPN or PNP device within the working range, the collector current IC is a function of the base current IB,

 

 

Gate turn OFF (G.T.O) Thyristor

Gate OFF Thyristor StructureThe conventional thyristor can only be turned off by effectively reducing the anode current to zero, but the gate turn off thyristor, as its name implies, has a structure such that it can be turned off y removing current from the gate.

Thyristor Gate Firing Networks

Typical Firing CircuitA firing network consists of a Transformer for isolating a resistor R1 to limit gate current and a resistor R2 to limit gate voltage. When the thyristor is in the OFF state

Thyristor Volt Ampere Characteristics

Thyristor With gate terminal openThe thyristor in this condition may be considered as three diodes in series, with directions such as to prevent conduction in either direction.

Thyristor

Thyristor was invented in 1957 at Bell Labs. They are extensively used as switches, operating from conducting state to non-conducting state.

Seven Segment Display

In electronic clocks calculators measuring instruments and some other scientific instruments LED are used to display the numerical digits. 

Passive Transducers

Passive Transducers required an external power supply and therefore output is equal to the variation in a physical parameter such as pressure, temp etc

Three Phase motor control using SCR

In this method the speed of squirrel gauge induction motor control  by varying the stator voltage, which is possible with the help of three sets of SCR’s connected back to back(parallel but opposite in direction ) with  each phase of input supply as shown  in figure  below.

SCR DC Motor control

The speed of  DC motor  can be control by using  SCR  in AC circuit  as shown in the below figure.

Magnetic Amplifier

The diagram of magnetic amp or magnetic amplifier is shown in figure below, only silicon diodes are added in series with each winding of the saturate reactor.

LVDT

LVDT Linear Voltage Diffrential TransducerLVDT consist of one primary winding and two secondary windings, which are placed at either side of the primary winding on the same magnetic core as shown in figure

Inverter

Inverter is a device which converts the DC power into A.C and desired voltage and frequency.

Gluco Meter

Gluco-meter stands for Glucose meter. This instrument is used to check the % value of sugar in the blood of a human body.

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