3 Phase-controlled DC motor drives
3 Phase-controlled DC motor drives
3 Phase-controlled DC motor drives
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• The air gap power constrains the induced emfand flux field asP an = 1 p.u. = e n i an = φ fn ω mn i an• If i an is equal to 1 p.u., thenφ fn ω mn = 1 φ fn = 1/ω mn• Hence, the normalized induced emf ise n = 1• In the field weaken region, the power outputand induced emf are maintained at their ratedvalues by programming the field flux to beinversely proportional to the rotor speed.