Electrical Machines 2

Syllabus

• Synchronous Machines:
  • Construction, principle of operation, equivalent circuits
  • Obtaining equivalent circuit parameters
  • Power, losses, efficiency in an isolated generator
  • Ext. charact. of a generator
  • Generator operation on an infinite power network; connecting the synchronous machine
  • Load management ; changing P and Q. V curves
  • Stability of the synchronous machine
• DC Machines:
  • Construction, principle of operation, excitation types, equivalent circuits
  • Power, losses, efficiency
  • Ext. charact. of a generator as a function of the excitation. Voltage control
  • Ext. charact. of a motor as a function of the excitation
  • Speed control. Starting, braking and reversing
  • Dynamics of Electric Machines
  • Mechanical equation
  • N=f(t) and mechanical parameters
• Operating principle of non-conventional rotating electrical machines.