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

What is DC Shunt Motor?DC Shunt Motor DefinitionA DC shunt motor is defined as a type of DC motor where the field windings are connected in parallel to the armature winding, allowing both to receive the same voltage.Constant FluxThe DC shunt motor is a constant flux motor because the field flux remains nearly constant due to the parallel connection of the windings.DC Shunt Motor EquationsIn a DC shunt motor, the supply current splits into two parts: Ia, flowing through the armature winding of re

What are Brushless DC Motor?BLDC Motor DefinitionA brushless DC motor is defined as an electronically commutated motor that lacks brushes, enhancing operational efficiency and torque.Core ComponentsA BLDC motor consists of two primary parts: the rotor (rotating) with magnets, and the stator (stationary) with windings. Permanent magnets on the rotor interact with the stator’s electromagnets, controlled by high-power transistors and a solid-state circuit for power distribution.Design TypesInner Ro

What is Construction of DC Motor?DC Motor DefinitionA DC motor is defined as a device that converts direct current electrical energy into mechanical energy.A DC motor is constructed with: A Stator A Rotor A Yoke Poles Field windings Armature windings Commutator BrushesStator and RotorThe stator is the stationary part with field windings, and the rotor is the rotating part causing mechanical motion.Field Winding in DC MotorField winding, made of copper wire, generates a magnetic field for rotor o

What is the Operating Principle of DC Motor?DC Motor DefinitionA DC motor is defined as a device that converts direct electrical energy into mechanical energy using magnetic fields and electrical currents.The following are the basic steps of the working principle of DC motors:Excitation field: When a DC power supply supplies power to the windings in the stator (fixed part), a constant magnetic field is generated in the windings.Electromagnetic force: When a current passes through the winding of

What is are Losses in DC Machine ?DC Machine Losses DefinitionIn a DC machine, losses refer to the input power that doesn’t convert into useful output power, reducing efficiency.Copper LossesThese occur in the windings due to resistance and are divided into armature loss, field winding loss, and brush contact resistance loss.Armature copper loss = Ia2RaWhere, Ia is armature current and Ra is armature resistance.These losses are about 30% of the total full load losses.Core LossesThese include hys

What is an Armature ?Armature DefinitionAn armature is the component of electric machines that carries alternating current and interacts with a magnetic field, essential for both motors and generators.Motor FunctionIn motors, the armature converts electrical energy into mechanical energy, utilizing electromagnetic induction and rotational motion.Generator FunctionIn generators, the armature transforms mechanical energy into electrical energy, driven by the motion within a magnetic field.Key Part

How dose a Electric Motor Work?Electric Motor DefinitionAn electric motor is a device that converts electrical energy into mechanical energy.Motor Working PrincipleWorking principle of DC Motor mainly depends upon Fleming Left Hand rule. In a basic DC motor, an armature is placed in between magnetic poles. If the armature winding is supplied by an external DC source, current starts flowing through the armature conductors. As the conductors are carrying current inside a magnetic field, they will

What is an Electric Motor ?Electric Motor DefinitionAn electric motor is a device that converts electrical energy into mechanical energy using magnetic fields and electric currents.Core FunctioningThe main principle behind all electric motors is Faraday’s Law of induction, which describes how a force is generated from electrical and magnetic interactions.Types of Electric Motors DC Motors Synchronous Motors 3 Phase Induction Motors (a type of induction motor) Single Phase Induction Motors (a typ

What is a Slip Ring?Slip Ring DefinitionA slip ring is defined as an electromechanical device used to connect a stationary system to a rotating system to transmit power or electrical signals.Working PrincipleSlip rings have two main components: metal rings and brush contacts. The number of rings and brushes depends on the machine’s design and application.Depending on the RPM (rotations per minute), either the brushes are fixed and the rings rotate, or the rings are fixed and the brushes rotate.

What is a Rogowski Coil?Rogowski Coil DefinitionA Rogowski coil is defined as an electrical device that measures alternating current (AC) and high-speed transient or pulsed currents.Rogowski Coil CharacteristicA Rogowski coil is an evenly wounded coil with N number of turn and constant cross-section area A. There is no metal core in a Rogowski coil. The end terminal of the coil is returned through the central axis of the coil to another end. Therefore, both terminals are at the same end of the c