3 Phase-controlled DC motor drives
3 Phase-controlled DC motor drives
3 Phase-controlled DC motor drives
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3.2 Principles of <strong>DC</strong> <strong>motor</strong>s speed Control• The induced voltage is dependent on thefield flux and speede = Kφ f ω m• The flux is proportional to the field currentφ f ∝ i f• The speed is expressed asωm∝eφfe∝if(v − i∝ifaRa)• The rotor speed is dependent on the appliedvoltage and field current.