- Determine diameter and length for 100 Kw, 230V, 750 rpm, 6 pole dc machine. How the choice is made for selecting pole numbers in a dc machine.

- Find the suitable number of poles and the dia. of the core of a 400Kw, 550 V, 180 rpm d.c. generator having 92% efficiency. Assume an average flux density in the air gap of about 0.6 wb/m
^{2}and ampere conductor per meter to be 35000.

- Explain the use of a digital computer in designing of an electrical machine giving its advantages and limitations.

- Give Computer Aided Design approaches by the following methods:

(a) Analysis

(b) Synthesis

(c) Hybrid

- Give concept of optimization as applied to the design of electrical machines. Name some of the optimization techniques employed in design and briefly describe its general procedure.

- Explain the design procedure for design of stator of a 3-phase turbo-alternator and write a flow chart to estimate the main dimensions. What statements will have to be changed to make the same program valid for a water wheel generator.

- If the design data of a single phase transformer is known, write flow chart for determining % regulation and efficiency at different load currents and power factors.

- Give design procedure for design of rotor of a wound rotor induction motor.

- Explain, with flow chart, how the performance of a water wheel generator may be estimated from the design data and what steps can be taken to improve the performance.

- Write a flow chart to design a d.c. machine and estimate its efficiency.

- Write a procedure to obtain the leakage reactance of a 3-phase core-type transformer with concentric winding with its relevant computer flow chart and indicate how the value of leakage reactance be controlled by design parameters.

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