Articles About Electrical and Electronics Engineering
Interview questions of electrical, electronics and instrumentation
There is wide use of an induction motor. We use induction motor in the industries because it is robust,maintenance free and very reliable motor. This post aim to share induction motor interview questions and answers part-1. The below links have 10 questions in each part. These posts are very useful for electrical students and professionals. … Read more
Q.51 What is the major disadvantage of star delta starting of induction motor? In star delta starter, the stator first get connected in the star. In star, the voltage per phase is VL/√3. Where VL is the line voltage. The torque produced by motor depends on the voltage & it is square of the … Read more
Q.41 What is the condition for maximum torque in induction motor? The rotating magnetic field generated by the stator (the rotational speed is the synchronous rotational speed n1) and the relative motion of the rotor winding, the rotor winding cutting magnetic induction line generates an induced electromotive force, thereby generating an induced current in the rotor winding. … Read more
Q.31 What are the various method of measuring slip? We can measure the slip of the induction motor by following methods. Actual measurement of rotor speed Measurement of rotor frequency Stroboscopic method Q.32 What is crawling in induction motor? Crawling is the phenomenon of running the motor at less than its synchronous speed. The motor … Read more
Q.21 Which Induction motor has higher starting torque? The slip ring motor has high starting torque as the resistance of the rotor winding is increased by adding the external resistance to it. The starting torque is increased as the power factor of the rotor circuit gets improved during starting. T= K* Flux* Rotor Current* Power … Read more