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
