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How many factors does the design of armature of synchronous machines depend upon?
Answer: d Explanation: There are 5 factors that decide the design of the armature of synchronous machines. They are i) single or double layer winding, ii) number of armature slots, iii) coil span, iv) turns per phase, v) conductor section.
Answer: d
Explanation: There are 5 factors that decide the design of the armature of synchronous machines. They are i) single or double layer winding, ii) number of armature slots, iii) coil span, iv) turns per phase, v) conductor section.
See lessThe rotor is slotted for one-third of its periphery.
Answer: b Explanation: The rotor is slotted for only two-thirds of its periphery. It is because to reduce the flux pulsations and the cost factors.
Answer: b
See lessExplanation: The rotor is slotted for only two-thirds of its periphery. It is because to
reduce the flux pulsations and the cost factors.
How many types are the rotor slots distinguished into?
Answer: a Explanation: There are 2 types of rotor slots in the turbo-alternators. They are i) radial sort ii) parallel slot rotors.
Answer: a
See lessExplanation: There are 2 types of rotor slots in the turbo-alternators. They are i) radial sort ii) parallel slot rotors.
What is the use of the slot in the rotor?
Answer: d Explanation: The rotors slots are used for inserting the field windings. The rotor slots are also used for securing the field windings also.
Answer: d
See lessExplanation: The rotors slots are used for inserting the field windings. The rotor slots are also used for securing the field windings also.
The overhang has to be highly reinforced in turbo alternators.
Answer: a Explanation: The overhang has to be highly reinforced in turbo alternators. The overhang is distributed over a large number of sections which eliminates the concentration of conductors in the overhang.
Answer: a
See lessExplanation: The overhang has to be highly reinforced in turbo alternators. The
overhang is distributed over a large number of sections which eliminates the
concentration of conductors in the overhang.
What is the voltage range for large turbo-alternators?
Answer: d Explanation: The generation voltage normally used are 15 kV for 100-200 MW machines. The voltage range for the large turbo-alternators are 20-25 kV.
Answer: d
See lessExplanation: The generation voltage normally used are 15 kV for 100-200 MW
machines. The voltage range for the large turbo-alternators are 20-25 kV.
What is the use of the laminated and transposed conductors in turbo alternators?
Answer: d Explanation: The presence of large currents requires the use of multi circuit windings. The use of the laminated and transposed conductors in turbo alternators is to reduce the eddy current loss.
Answer: d
Explanation: The presence of large currents requires the use of multi circuit windings. The use of the laminated and transposed conductors in turbo alternators is to reduce the eddy current loss.
See lessWhat is the pulsational force produced for 500 MW machine?
Answer: c Explanation: The generator designed with low voltage gives high currents which produce high pulsational forces. The pulsational forces can be as high as 80 kN per m
Answer: c
See lessExplanation: The generator designed with low voltage gives high currents which produce high pulsational forces. The pulsational forces can be as high as 80 kN per m
What is the advantage of the grain oriented steel laminations?
Answer: b Explanation: The grain oriented steel laminations are also one type of laminations used for the stator core. They result in the lowering of the core loss.
Answer: b
See lessExplanation: The grain oriented steel laminations are also one type of laminations used for the stator core. They result in the lowering of the core loss.
What type of lamination is used for the stator core of the turbo alternators?
Answer: d Explanation: The stator core is made up of segmental laminations. The grain oriented steel laminations are another type of stator laminations made use of.
Answer: d
See lessExplanation: The stator core is made up of segmental laminations. The grain oriented
steel laminations are another type of stator laminations made use of.