Electromechanics and Electric Drives, 5 cr

Core content

• Typical torque curves, need of gears, protection of drives
• Choose of the suitable drive (max current, power losses, temperature)
• Operation principle, structure and applications of DC motors. Control of DC drive.
• Operation principle, structure and applications of synchronous machines (permanent magnet machine). Control of synhronous motor drive.
• Operation principle, structure and applications of induction motors. Start-up methods of induction motor. Scalar control (U/f-control, Volts/Hz-control) of induction motor.

Complementary knowledge

• Regenerative braking
• Detailed knowledge about the choose of motor drive
• Effect of thyristor-rectifer to grid power quality.
• Operation principle, structure and applications of reluctance machine.
• Operation principle, structure and applications of slip-ring machine. Direct torque control (DTC) method.

Specialist knowledge

• Electric/hybrid vehicles, energy storages in electric vehiclses and working machines
• Active rectifier (AFE) and its effect to grid harmonics compared to diode rectifier
• Brushless DC drive (BLDC)
• Control of reluctance machine.
• Operation principle and structure of DFIG.