Synchronous Generator Salient Pole vs Non Salient Pole
Salient Pole Synchronous Alternator: Salient pole Generators will have large diameter and short axial length Pole shoes cover 2/3 of the pitch Salient Poles are laminated in order to reduce eddy currents…
Why Armature is placed on Stator for Synchronous machines
Operation principle of synchronous machine is quite similar to dc machine. However difference exists in the synchronous machine as there is no need to rectify the time varying emf generated…
Advantages and Disadvantages of Slip Ring Induction Motor
Advantages: High Starting torque with low starting current. Maximum starting can be attained in the slip ring motor compared to squirrel cage motor by inserting an external resistance in each…
Squirrel Cage Induction Motor vs Slip Ring Induction Motor
Advantages of Squirrel-Cage Induction Motors The advantages of squirrel-cage motors compared with the slip ring induction motors are given below (i) They are more robust and cheaper (ii) Comparatively they have  higher efficiency…
How RTD Measuring the Temperature
Measuring temperature with RTD / Resistance thermometer The RTD resistance will change with respect to the temperature. So temperature will be measured by using the RTD resistance. The simplest way to…
Why Bias used in Proportional Controller ?
The P-Only Algorithm The P-Only controller computes a CO action every loop sample time T as:  CO = CObias + Kc∙e(t) Where: CObias = controller bias or null value…
Torque Tube Level Measurement Principle
The displacer type liquid level measuring instrument is not a float as such, for the displacer is heavier than the  process fluid and the displacer moves very little during changes in…
Difference between Induction motor and Synchronous motor
Induction Motor: 3 phase induction motor is self starting. Self starting torque is generated hence no special means is required for starting of Induction motor. It is to be remembered…
Advantages & Disadvantages Induction Motor
Induction Motor: Almost 70% of the machines used in industries now a days are 3 phase induction motors. It works on the principle of induction where electro-magnetic field (emf) is induced in…
Advantages & Disadvantages of AC power and DC power
First electric power system was build in New York city in 1882. DC power was generated by steam generator supplying power to 59Â consumers. During the decade many small power systems…
