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1.In the design of electrical drives, high permeability materials are often used. Explain why this is...

1.In the design of electrical drives, high permeability materials are often used. Explain why this is so and give two examples of such materials.

2.If the current, voltage and power are measured at the terminals of a device containing only resistance and inductive reactance, how many tests are normally performed to determine the equivalent circuit parameters of transformers and induction drives. What simplification is made to the full equivalent circuit to facilitate this?

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