Technical articles on Electronics and Electrical Engineering topics focused on Basics of EE, Electronic components, power systems and equipment used for generation, transmission, operation, and controls of electricity.
Slip in an induction motor refers to the difference between the synchronous speed of the rotating magnetic field and the actual rotor speed. It is a fundamental property of induction motors and plays a crucial role in their operation. The voltage induced in rotor bars of an induction motor depends on the speed of rotor … Read more
What is Zener Diode A Zener diode is a special type of semiconductor diode designed to operate in the reverse-biased breakdown region. Zener diode maintains a nearly constant dc voltage while operated in proper conditions. Zener diodes are silicon based discrete semiconductor diodes that allow electric current to flow bidirectionally – either reverse or forward. … Read more
In Electrical Engineering, two-terminal components can be connected in series or parallel configurations. Electrical components connected in series are along a single “electrical path”. Each component in the series network has the same flow of electric current through it. The flow of current through any component is equal to the current through the network. The … Read more
We previously studied four induction motor formulas relating: In this article an expansion of Torque Formula in Electrical Motors is presented below. The torque (T) of a motors is directly proportional to its power (P) and inversely proportional to its rotational speed or RPM (N). The mathematical formula relating torque, power, and rotational speed is: … Read more
Demand factor is the ratio between maximum demand to the connected load on a power system. The mathematical formula for Demand factor (DF) is: DF = Maximum Demand/Connected load Example: A power station has 5 MW load connected to it. While the maximum demand is 3 MW. Find the D.F. Solution: DF = 3 MW/5 … Read more
The term simplex and duplex windings are linked to DC machines the rotor/armature winding in DC machines are classified into two types based on the plex of windings. Differences between Simplex and Duplex Windings Feature Simplex Windings Duplex Windings Rotor Construction It comprises of a single, complete, closed winding wound on a rotor It comprises … Read more
The turbo generator is an electrical generator that is connected to the shaft of a steam turbine or gas turbine for electric power generation. Turbo generators are employed for high shaft rotational speeds (usually steam and gas turbines). Its rotor is of non-salient pole-type construction that usually has two poles. Two pole turbo alternators operate … Read more
Impact of AC Electric Current on Human Body Amount of current Effect on body 1 mA or less No sensation is experienced with current less than 1 mA More than 5 mA Painful shock is experienced 10 to 15 mA Exposure to current may cause muscle contractions, which can cause some people to experience “freezing” … Read more
The ampacity of conductor is defined as the measure of its ability to carry electric current. The ampacity depends on different factors including the type of material, cross-sectional area, and type of area where the installation of conductors is being carried out. All types of metals conduct electric current, however conduction properties of metals vary. … Read more
While manufacturing squirrel cage rotor motors, one of the most important aspects which Design Engineers should consider is the number of rotors slots in reference to the number of selected stator slots. Rotor slots are abbreviated using Sr while stator slots are abbreviated using Ss. Electrical Design Engineers should carefully select appropriate combination of stator … Read more