Deepakkumar Yadav
DC Servomotor Q. What is meant by DC servo motor? Q. What is the working principle of DC servomotor? Q. What is DC Servomotor? Q. DC Servo Motor Block Diagram of DC Servomotor : Figure shows the block diagram of a closed loop control of a DC servomotor. The armature controlled DC servomotor is being used. Operation of DC Servomotor : In … Read more
AC Servomotors Q. What is AC Servomotor? Q. What is meant by AC servo motor? Q. How does an AC servo motor work? Q. What are the applications of ac servo motor In automatic control system it becomes necessary to compare system parameters with some reference. Whatever is the error it is amplified and used to drive motors … Read more
Permissible Limits for Variations in Electrical Machine Q. State the permissible limits for variation of : 1) Voltage 2) Current 3) Speed 4) Frequency. Voltage variation should not be ±5% of rated voltage. Current should not exceed rated current. Temperature rise should be within limits. Frequency should not vary by ±1 of rated frequency. Should work within ±2% of rated speed. … Read more
Energy Conservation Techniques to be Adopted to Reduce Losses in the Induction Motor Q. List out the energy conservation techniques to be adopted to reduce losses in the induction motor. Sr. No. Power loss area Efficiency improvement 1. Starter Cu loss (I21 R1) Use larger conduction – increase cross sectional area of startor winding which … Read more
What is Soft Starter & Advantages of Soft Starter Q. State four advantages of soft starter When starting, AC induction motor develops high torque than its required value at full speed. This mechanical stress is transferred to the mechanical transmission system resulting in excessive wear-tear and premature failure of chains, belts, gears, etc. Additionally, sudden rise … Read more
Energy Conservation Techniques to be Adopted to Reduce Losses in the Induction Motor Q. List out the energy conservation techniques to be adopted to reduce losses in the induction motor. (A) Improving Power Quality : Motor performance can be increased by maintaining the voltage level within in BIS standards i.e. within the tolerance limit of ± 6 … Read more
Different Losses are Minimized In Energy Efficient Motor Q. How Different Losses are Minimized In Energy Efficient Motor. Measures adopted for energy efficiency address each loss specifically as under : (A) Core Losses : Core losses are found in the stator-rotor magnetic steel and are due to hysteresis effect and eddy current effect during 50 … Read more
Comparison of Energy Efficient Motor With Standard Motor Q. Difference between normal motor and energy efficient motor Particulars Standard motor Energy efficiency motor 1.Material used They are manufactured with lower quality material and techniques. They are manufactured with higher quality material and techniques. Small length of core. More length of core. Lower quality … Read more
Selection of Electrical Motor The primary technical consideration defining the motor choice for any particular application is the tong required by the load, especially the relationship between the maximum torque generated by the motor and the torque requirements for start-up and during acceleration periods. The duty/load cycle determines the thermal loading on the motor. One consideration … Read more
Important Points About Energy Conservation In Electrical Machines As the motor receives its power by magnetic induction principle, the motors operating on this principle are called as induction motor. Three phase induction motors are of following types : Squirrel-cage rotor type. Phase wound or wound rotor type. Factors governing selection of induction motor : Electrical … Read more