Task III: You were asked to evaluate the efficiency of a 5.5 kW motor that operates on a constant load. You took the attached photo of the motor nameplate and then you collected the following measurements: Current = 6.2 A, power factor = 0.81, speed = 2925 rpm. The motors runs daily on an average of 16 hours. Prepare a short motor assessment note which includes: • The measurements you took, and the equipment you used to obtain such measurements • Calculation of the current motor efficiency • Energy saving measure(s) you would recommend, with a financial feasibility analysis
Synchronous Generator
In comparison to an asynchronous generator, it is a machine where the rotor speed is equal to the rotating magnetic field produced by the stator, i.e., mechanical speed is equal to the electrical speed, thus called synchronous, and not asynchronous.
Salient Pole Rotor
Salient pole rotor includes a large number of exposed poles mounted on a magnetic wheel. The construction of a bright pole is as shown in the image on the left. The proposed poles are made of metal laminations. The rotor winding is provided on these poles and is supported by pole shoes.
Task III:
You were asked to evaluate the efficiency of a 5.5 kW motor that operates on a constant load.
You took the attached photo of the motor nameplate and then you collected the following
measurements: Current = 6.2 A, power factor = 0.81, speed = 2925 rpm. The motors runs daily on
an average of 16 hours.
Prepare a short motor assessment note which includes:
• The measurements you took, and the equipment you used to obtain such measurements
• Calculation of the current motor efficiency
• Energy saving measure(s) you would recommend, with a financial feasibility analysis
According to the question the rating of the motor are as:
Power rating = 5.5 kW
Current = 6.2 A,
Power factor = 0.81
Speed = 2925 rpm.
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