Electrical4U 
Synchronous motors are defined as constant speed motors that run at the synchronous speed of the supply. They are typically used for constant speed operations and to improve the power factor under no load conditions. Synchronous motors also have fewer losses compared to induction motors of the same rating.The speed of a synchronous motor is … Read more
The Physics of a Semiconductor There are some materials, which have neither good conductivity nor bad conductivity of electricity. They have a moderate range of electrical conductivity. The examples of such materials are germanium, silicon, carbon etc. As the conductivity of those materials lies between good conductors and insulators, and these materials are called semiconductors. … Read more
What are Fiber Optics Cables Used For? Fiber optic cables (also known as optical fiber cable) are network cables that contain many strands of fine glass fibers known as optical fibers, which are kept well-insulated within the body of the cable. These cables are created for the use of long-distance, high-performance data networking, and telecommunications. … Read more
What is a Buck Boost Converter? The buck–boost converter is a type of DC-to-DC converter (also knownas a chopper) that has an output voltage magnitude that is either greater than or less than the input voltage magnitude. It is used to “step up” the DC voltage, similar to a transformer for AC circuits. It is … Read more
Introduction of Indoor Switchgear Switchgear is a generalized term given to a unit which is a combination of protective control and metering types of equipment as a whole. Switchgear can be of different forms depending on the kind of applications such as protection of feeders, protection of motors, rail traction purposes, measurements etc. For example, … Read more
What is DOL Starter? A DOL starter (also known as a direct on line starter or across the line starter) is a method of starting a 3 phase induction motor. In a DOL Starter, an induction motor is connected directly across its 3-phase supply, and the DOL starter applies the full line voltage to the … Read more
Operational amplifier or Op Amp as they are generally called are linear DC amplifiers. An op amp is a three-terminal device, one called the inverting terminal, one non-inverting terminal and the other is called the output terminal. Below, you can see a pin diagram of a typical Op amp. An ideal Op amp has the … Read more
Current flows from a high voltage point to a low voltage point because of the potential difference. Electrical polarity describes the direction of this current flow. In a DC system, one pole is always positive, and the other is negative, so the current flows in one direction. In an AC system, the terminals change polarity … Read more
Power electronics focuses on converting power from one form to another and changing voltage levels using power electronic converters. Various control strategies help in this conversion. Another key aspect is signal conditioning. The conditioning of signals helps us to ensure clean and pure, i.e. free from harmonics, input and output signals. It is not possible … Read more
Based on the behavior and properties of Superconductors, these are classified into two categories-(1) Type – I Superconductors: Low Temperature Superconductors.(2) Type – II Superconductors: High Temperature Superconductors.Type-I and Type-II superconductors differ slightly in their behavior and properties. The comparison of type-I and type – II superconductors is shown in the table below Type – … Read more