What is slot loading?

1.       What is slot loading? Slot loading is the product of current in the armature conductor and number of conductors per slot. Slot loading = Iz Zs Amp conductor

2.       Mention the advantages and disadvantages of choice of less number of poles for DC machine.  Advantages:   (i) Reduction in frequency of flux reversals and iron losses  (ii) Reduction in flash over between brushes  (iii) Reduction in labour charges and cost of assembly  (iv) Reduction in number of commutator segment and brushes Disadvantages:   (i) Increase in weight of armature core and yoke   (ii) Rise in cost of armature and field conductors   (iii) Increase in overall length and diameter of machine (iv) Increase in length of commutator  (v) Increase in distortion of field form under load condition

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  Discuss in detail how the mechanical and magnetic properties of nanomaterials vary with particle size.

1.       Explain with a suitable example, the synthesis of nanostructured materials employing self-assembly, self-organisation and template-based methods. 2.       Discuss in detail how the mechanical and magnetic properties of nanomaterials vary….

  Explain the main purpose of interpoles in DC machine.

1.       Explain the main purpose of interpoles in DC machine. 2.       Why tapering of interpoles is carried out in a DC machine? 3.       Provide the specifications of DC machine. 4.      ….

Discuss about “active copper” and “inactive copper” in the design of DC machine.

1.       Mention the location and use of compensating winding in DC machine. Compensating winding is placed under the pole shoe of DC machine that is used to prevent the distortion….