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

What is Blocked Rotor Test of Induction Motor?Blocked Rotor Test DefinitionThe blocked rotor test of an induction motor is defined as a test to find the leakage impedance and other performance parameters.Purpose of Blocked Rotor TestIt determines torque, motor characteristics, and short-circuit current at normal voltage.Testing ProcedureDuring the test, the rotor is blocked, and low voltage is applied to the stator to measure voltage, power, and current.Effect on ImpedanceRotor position, frequen

What is No Load Test of Induction Motor?No Load Test of Induction Motor DefinitionA no load test of induction motor is defined as a test conducted when the rotor rotates at synchronous speed without any load torque.Purpose of No Load TestThis test helps identify no-load losses like core loss, friction loss, and windage loss.Theory of TestThe test assumes that the impedance of the magnetizing path is large, causing small current flow and the applied voltage is across the magnetizing branch.Test P

What is Testing of Induction Motor?Induction Motor DefinitionAn induction motor is defined as a type of electric motor that operates on the principle of electromagnetic induction.Basic Parameters Current Voltage Power ResistancePreliminary Tests Firstly check the components of motor No-load running current test High potential test Air-gap measurement Balancing of current Temperature rise in bearing Voltages in shaft Direction of rotation Level of noise Strength of vibration Air gap eccentricity

What is the Circle Diagram of Induction Motor ?Circle Diagram DefinitionA circle diagram is a graphical tool used to represent the performance of electrical machines like induction motors.Importance of Circle DiagramIt provides a comprehensive view of various performance parameters, unlike a phasor diagram which only shows current and voltage for a single condition.Tests for Data CollectionThe no-load and blocked rotor tests are essential for gathering data to draw the circle diagram of an induc

What is the Equivalent Circuit for an Induction Motor?Equivalent Circuit DefinitionThe equivalent circuit of an induction motor shows its internal parameters like losses using inductors and resistors. The induction motor always runs below the synchronous or full load speed and the relative difference between the synchronous speed and speed of rotation is known as slip which is denoted by s. Where, Ns is synchronous speed of rotation which is given by-Where, f is the frequency of the supply volta

What is the Low Power Factor Operation of Induction Motor?Induction Motor DefinitionAn induction motor is a type of electric motor that uses electromagnetic induction to generate mechanical power. Induction Motors are used in many industrial and household applications. These motors need magnetic fields to work, which means they draw magnetizing current from the source. The magnetizing current creates the flux in the motor’s air gap and is about 20% to 60% of the motor’s full load current. It doe

What are the Advantages and Disadvantages of Induction Motor?Induction Motor DefinitionAn induction motor is defined as an electric motor that operates on alternating current (AC) and uses electromagnetic induction to generate motion.Simple ConstructionInduction motors have a simple and robust construction, making them reliable and low maintenance.Advantages of Induction Motors Simple structure and easy maintenance Environmentally resistant, robust and mechanically strong Low cost of motor It do

What is The Applications of Induction Motor?Induction Motor DefinitionAn induction motor is an AC electric motor that operates on the principle of electromagnetic induction.Types of Induction MotorsSquirrel cageA squirrel cage induction motor is a type of induction motor that has a cylindrical rotor with slots parallel to the shaft. The slots contain uninsulated conductor bars of aluminum or copper that are short-circuited by heavy end rings at both ends of the rotor. The rotor resembles a cage

What is Compound Wound DC Motor?Compound Wound DC Motor DefinitionA compound wound DC motor (also known as a DC compound motor) is defined as a self-excited motor using both series and shunt field coils to combine the benefits of high starting torque and good speed regulation.Types of Compound Wound DC MotorsLong Shunt Compound Wound DC MotorVoltage and Current Equation of Long Shunt Compound Wound DC MotorLet E and Itotal be the total supply voltage and current supplied to the input terminals o

What is Series Wound DC Motor ?Series Wound DC Motor DefinitionA series wound DC motor is a type of self-excited motor where the field winding is connected in series with the armature winding.ConstructionThe motor includes key parts like the stator, rotor, commutator, and brush segments, similar to other DC motors.Voltage and Current EquationLet the supply voltage and current given to the electrical port of the motor be given by E and Itotal respectively.Since the entire supply current flows thr