Comparison of MOSFET and BJT
When we are studying about Power semiconductor devices, we will start from Diode then Bipolar Junction Transistor and then MOSFET and so on… It is good to know that what…
Power MOSFET Safe Operating Area
The safe operating area determines the current and voltage boundary within which the device can be operated without destructive failure. There are two SOAs: Forward Biased Safe Operating Area (FBSOA)…
Basics of Thyristor
Thyristor is a three terminal device with four layers of alternating P and N type material (three P-N junctions). The three terminals are Anode, Cathode and Gate. The Thyristor is…
SCR Switching Characteristics
SCR Switching Characteristics or Dynamic Characteristics: The switching characteristics are important particularly at high-frequency, to define the device velocity in changing from conduction state to blocking state and vice versa.…
SCR Triggering Methods
Triggering (Turn on) Methods of Thyristor: Triggering:- The turning on Process of the SCR is known as Triggering. In other words, turning the SCR from Forward-Blocking state to Forward-Conduction state…
Turning Off SCR – Commutation
To tum on a thyristor, a low voltage, short duration pulse is applied to the gate (typically 4V, 100µs). Once the thyristor is turned-on, the gate loses control and the thyristor will…
Thyristor Interview Questions & Answers
What are the different types of Thyristor Protection? For  reliable operation of SCR, it should be operated within the specific ratings. SCRs are very delicate devices and so they must…
Basics of Pressure
What is a fluid? Matter can exist in several states. These states are known as the physical states or the states of matter. The first three states of matter are…
Interview Questions on Transmission & Distribution
Why is alternating current used for transmission? AC is used for transmission because transformers can step it up to high voltage for long distance, and down to low voltage for…
Electrical Motors Interview Question And Answers
What are causes of hot bearings? The causes are lack of oil belt too tight armature not centred with respect of pole pieces bearings too tight or not in line…
