|Semester||Semester 6 – Spring|
Basic quantities and equations for analyzing operating conditions and designing AC and DC electric drive systems.
2nd and 3nd Week
Friction – Moment of inertia – Kinetic energy of a rotating mass.
The electric drive system. Basic structure and categories. Physical characteristics of AC and DC motors.
4th and 5th Week
Drive mechanisms – Categories. Types of power production machines. Dependence of power machine’s torque upon various factors.
Torque Equation and stability in an electric drive system.
6th and 7th Week
Startup and control of AC and DC motors. Energy losses during transient conditions of AC and DC motors. Reduction of losses during motor’s transient conditions.
8th and 9th Week
Conventional and modern methods of starting of AC and DC motors.
Conventional and modern methods of speed control and regulation of AC and DC motors.
10th and 11th Week
Selection of an electric motor. Operating conditions. Protection’s degree (IP). Mounting. Methods for dealing with starting- and maximum load torque of a motor. Cooling methods. Insulation classes, permissible limits of temperature rise.
13th and 14th Week
Calculation of power-, torque- and speed requirements of a power production machine.
Selection of motor’s technical features for an electric drive system from commercial catalogs.
The course aims to provide students with fundamental concepts concerning the analysis and design of electric drive systems. Upon completion of the course students will be able to:
- know the characteristics and structure of an electric drive system, depending upon its type and operating conditions,
- identify the mechanical and electrical quantities that characterize an electric drive system,
- know the methods of starting-, torque- and speed adjustments of AC and DC electrical motors,
- calculate the power requirements of an electric drive machine,
- select the correct size of motor in an electrical power application,
- apply the methods of motor starting, torque- and speed adjustments in motors of various AC and DC electric drive systems.