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

Torque equation definitionThe torque in the three-phase induction motor is calculated based on rotor current, magnetic flux and power factor.Rotor currentThe rotor current is critical for generating torque and is affected by the induced electromotive force and impedance of the rotor.Starting torqueStarting torque is the torque generated when the induction motor is started. We know that at the beginning of the rotor speed, N is zero.Therefore, just by placing the value of s=1 in the torque equati

What is The Speed Control of Three Phase Induction Motor?Three-phase induction motorA three-phase induction motor is an electromechanical device that operates primarily at a constant speed unless a specific control method is used.V/f controlBy maintaining a constant voltage frequency (V/f) ratio, this method effectively controls the speed of the induction motor while preventing core saturation.Rotor and stator controlSpeed adjustment can be made from the rotor side, by increasing the resistance

What is a 3 Phase Induction Motor ?Three phase induction motor definitionA three-phase induction motor is a self-starting motor that converts three-phase AC electrical energy into mechanical energy without the need for an additional starting mechanism.Main componentThree-phase induction motor statorThe stator of a three-phase induction motor consists of a number of slots to build a three-phase winding circuit, which we connect to a three-phase AC power supply. We arrange the three-phase windings

What is Induction Motor Rotor?Induction motor rotor definitionThe rotor is a rotating part of a motor in which current is induced by a rotating magnetic field.Type of rotor Squirrel cage rotor Wound rotorSquirrel cage rotor featuresIn this type of rotor, the rotor winding consists of conductors that are embedded in semi-closed slots in the form of copper or aluminum strips in the laminated rotor core. In order to facilitate the formation of a closed path in the rotor circuit, both sides of the r

What is Deep Bar Double Cage Induction Motor?Deep bar double cage induction motor definitionDeep-bar double-cage induction motors are defined as motors that use double-layer rotors to enhance starting torque and efficiency.The structure of the double cage rotorIn the deep rod, the double cage rotor rod is divided into two layers.The outer layer contains bars with small cross sections and high resistance, short-circuited at both ends. This results in low flux linkage and low inductance. The high

What is Rotor Resistance Control of Induction Motor?Rotor resistance control definitionRotor resistance control is defined as a way to manage the speed of an induction motor by adjusting the resistance in its rotor circuit.Induction motor basicsThe working principle of the universal induction motor is that the motor speed can be adjusted by changing the resistance of the rotor.Speed control of induction motorSpeed control is essential for applications that require variable motor speeds and can b

What is a DOL Starter ?DOL Defines an initiatorDOL Starter (Direct On Line Starter) is a method of starting a three-phase induction motor. In the DOL starter, the induction motor is directly connected to its 3-phase power supply, and the DOL starter applies the full line voltage to the motor terminals. The motor is protected even when connected directly to the power supply. DOL motor starters include protection and, in some models, condition monitoring. The following is the wiring diagram of the

What is a Star Delta Starter?Star triangle starter setThe star triangle starter is used to start a three-phase induction motor by starting in a "star" configuration and then switching to a "triangle" after reaching a certain speed, thereby minimizing initial electrical overload.Circuit diagramThe circuit includes a TPDP switch that helps to change the motor connection from a star to a triangle, thereby effectively controlling current and torque during startup. For that let us consider,VL = Suppl

What is the Starting of Three Phase Induction Motor ?Three phase induction motor definitionA three-phase induction motor is a type of motor that operates with a three-phase power supply and a three-phase stator winding.Rotating magnetic fieldThe stator windings are arranged 120 degrees apart to generate a rotating magnetic field that induces a current in the rotor.Slip speedThe slip speed is the difference between the synchronous speed of the stator magnetic field and the rotor speed to ensure t

What is a Squirrel Cage Induction Motor ?Squirrel-cage induction motor definitionA squirrel cage induction motor is a motor with a rotor that looks like a squirrel cage and operates based on electromagnetism. The rotor is a steel-laminated cylindrical assembly containing a highly conductive metal such as aluminum or copper. When alternating current flows through the stator windings, it creates a rotating magnetic field. The process induces an electric current in the rotor, which creates its own