ELE 747 Lecture Notes - Lecture 1: Mathematical Model, Flux Linkage, Block Diagram
9 Apr 2016
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Topic 1 dc motor dynamic performance and speed control. 1. 1 objectives: to study dc motor dynamic models, to investigate dc motor dynamic performance, to study dc moor speed control schemes. 1. 2 general aspects: dc motor ratings: 1w to5000 kw, features: motor speed can be easily controlled, drawbacks: expensive, large size, maintenance. 1. 3 dc motor steady state model (review) fi fr fv ai ar ae av. K a av ae r fi ak r . 1: electromagnetic torque et = ak ai, rotor speed r = Purpose: to study dc motor dynamic performance fi fv: dynamic model (fig 2. 3-1 pg. Aal - self inductance of field and armature windings ae - armature back emf (instantaneous value) ae = ae = ak . Af il r r f where ak. Afl - mutual inductances between the field and armature windings: equations fv = f ir f. Ff pi f (where p = d dt av = aair.
