DC Shunt Motor : Construction, Speed Control & Characteristics

CONSTRUCTION OF SHUNT DC MOTOR The field winding  of DC shunt motor is wound with many turns to increase the flux linkage and the armature winding is designed to carry higher current. This is done because the torque is proportional to the armature current and the flux. DC shunt motor is self-excited type motor because … Read more

Why Are Rotor Bars Skewed in An Induction Motor?

  What is Skewing of Rotor Slots? As shown in the above picture, the rotor bars of an induction motor are not parallel with the shaft and the bars are skewed. The rotor bars are skewed purposefully to get the following performance advantages. Advantages of Skewing of Rotor of Induction Motor There are following advantages of skewing … Read more

Star Delta Starter | Working Principle, Power and Control Circuit Diagram

Introduction to Star Delta starter:   The star delta starter is widely used for the starting of a three phase induction motor. In star delta starting,the motor is first connected in star connections and after achieving the required speed the motor is connected in delta connection.   The small rating induction motor can be started … Read more

Why is Diode Non-Ohmic Semiconductor Device?

Difference Between Ohmic and non-Ohmic Conductors: Ohmic Conductors: The conductors that obey the ohm’s law is called ohmic conductors. In an ohmic conductor, the current and the voltage has linear relationship. The current increase or decrease as the voltage is increased or decreased.The non-ohmic conductor has non-linear current-voltage relationship.   The resistance, inductance and the … Read more