Free Expert Guides on Power Systems, Circuit Design & Electrical Troubleshooting

Transistor DefinitionA transistor is defined as a semiconductor device used to amplify or switch electronic signals.Types of TransistorsThere are two main types of transistors: Bipolar Junction Transistors (BJTs) and Field Effect Transistors (FETs).BJTsThese are current-controlled devices with three terminals (Emitter, Base, Collector) and can be further classified into various types like Heterojunction Bipolar Transistors and Darlington Transistors.FETsThese are voltage-controlled devices with

LASERThe acronym LASER stands for Light amplification by stimulated emission of radiation. A laser is a device that produces a unique type of light not found naturally. This light is generated through optical amplification, which relies on the stimulated emission of electromagnetic radiation. It is different from conventional light in three ways. First, the lights from LASER contains only one color or wavelength that is why it is called ‘monochromatic’. Secondly, all the wavelengths are in phase

Braking of DC Motor DefinitionElectrical braking stops a DC motor by controlling voltage and current instead of using mechanical friction.Regenerative BrakingIt is a form of braking in which the kinetic energy of the motor is returned to the power supply system. This type of braking is possible when the driven load forces the motor to run at a speed higher than its no-load speed with a constant excitation.The motor back emf Eb is greater than the supply voltage V, which reverses the direction of

Definition of Electrical DrivesElectrical drives are systems that control themotion of electrical motors by adjusting power and operational parameters. Types of Electrical DrivesThere are three main types—single-motor, group motor, and multi-motor drives, each suited for different applications.Reversible vs. Non-Reversible DrivesDrives are classified as reversible or non-reversible based on their ability to change the direction of generated flux.Converters can be divided into 5 types AC to DC co

Frog Leg Winding DefinitionA frog leg winding is a combination of a multiplex wave and a simplex lap winding in the same slots. It retains the advantages of both lap windings and wave windings without their inherent disadvantages.Lap and wave windings each have an equal number of parallel paths, which are connected to the same commutator.The frog-leg winding has as many parallel paths as duplex lap windings because the simplex lap winding portion supplies ‘P’ number of parallel paths and the mul

DC Generator Types Permanent Magnet DC Generators – Field coils excited by permanent magnets Separately Excited DC Generators – Field coils excited by some external source Self Excited DC Generators – Field coils excited by the generator itselfSelf Excited GeneratorA self-excited DC generator uses its own output to power its field coils, which can be arranged as series, shunt, or compound wound.The three types of self-excited DC generators are: Series Wound Generators Shunt Wound Generators Comp

Definition of Synchronous MotorsSynchronous motors are electric motors that rotate at a speed directly proportional to the frequency of the supply current.Non Excited Synchronous MotorsThese motors use external magnetic fields to magnetize a steel rotor, achieving synchronization without additional electrical excitation.Hysteresis and Reluctance MotorsTypes of non-excited synchronous motors that use different principles (hysteresis losses and magnetic reluctance) to achieve and maintain synchron

What is are the Types of Single Phase Induction Motors ?Single phase induction motor definitionA single-phase induction motor is an electric motor that operates in a single AC phase and requires additional mechanisms to initiate rotation.According to the extra flux single-phase induction motor can be divided into Split phase induction motor Capacitance starts induction motor Capacitor start Capacitor run induction motor Permanent shunt capacitor (PSC) motor Shaded pole induction motorSeparate ph

What are the Types of Transformers Windings?Types of Transformers Core type transformers have windings on outer limbs Shell type transformers have windings on inner limbsMainly there are two types of transformer Core type transformer Shell type transformerTypes of Winding used for Core Type TransformerCylindrical WindingsThese windings are layered type and uses a rectangular or round conductor shown in Fig.(a) and (b). The conductors are wound on flat sides shown in Fig.(c) and wound on the rib

What are the Types of Electrical Machines?Electrical Machines OverviewElectrical machines are devices like transformers, generators, and motors that either convert electricity to mechanical power or vice versa.TransformersA transformer transfers electrical energy between two circuits without changing the frequency, crucial for regulating voltage levels in power distribution.Transformers Types Step up transformer Step down transformerGeneratorsGenerators convert mechanical energy to electrical en