Su-Kam Power Systems Research and Development Interview Questions and Answers

A transformer is a device that transfers electrical energy between two or more circuits through electromagnetic induction.

• Transformers are commonly used to step up or step down voltage in electrical power distribution.

• They consist of two coils of wire, known as the primary and secondary coils, wrapped around a core.

• The primary coil is connected to a source of alternating current, which creates a changing magnetic field in the core.

• This changing magnetic field induces a voltag...read more

An inverter is an electronic device that converts direct current (DC) to alternating current (AC).

• Converts DC power to AC power

• Used in solar power systems to convert DC electricity from solar panels to AC electricity for use in homes

• Commonly used in uninterruptible power supplies (UPS) to provide backup power during outages

Op amp stands for operational amplifier, a type of electronic amplifier with high gain and differential inputs.

• Op amp is a type of amplifier that amplifies the difference in voltage between its two inputs.

• It has a very high open-loop gain, typically around 100,000.

• Op amps are commonly used in signal conditioning, filtering, and mathematical operations in electronic circuits.

• Examples of op amp ICs include the LM741, AD823, and TL072.

Transformers are classified based on their construction and purpose, such as power transformers, distribution transformers, and instrument transformers.

• Power transformers are used to step up or step down voltage for transmission and distribution of electricity.

• Distribution transformers are used to supply lower voltage to end-users.

• Instrument transformers are used for measuring voltage and current in power systems.

• Other types include autotransformers, isolation transformers, a...read more

The type of inverter used is a grid-tied inverter.

• Grid-tied inverters are connected to the utility grid and do not require batteries.

• They convert DC power from solar panels into AC power for use in the home or to be fed back into the grid.

• Examples of grid-tied inverters include string inverters, microinverters, and power optimizers.