DEE-33036 Electric Drives, 5 cr
Additional information
The course gives the basic knowledge on motor drives. After the course, the students are able to choose the motor and converter with correct size to the defined application. Students know, how the torque curves of the most typical loads look like and they know the effect of the torque curve to the choose of suitable drive. The students are able to calculate the required drive size both for continuous and for periodic, variable loading conditions according to maximum load and temperature. The students know the required protection functions required with the drives.
The students know the basic structure and operation principle of DC machine, synchronous machine and induction machine. The students understand the basics about the control methods of the electric drives, especially scalar (U/f, Volts/Hz) control method.
Person responsible
Tuomas Messo, Jenni Rekola, Kirsi Nousiainen
Lessons
| Implementation | Period | Person responsible | Requirements |
| DEE-33036 2017-01 | 3 - 4 |
Jenni Rekola |
The course can be completed by passing the final exam. The course grade can be upgraded by carrying out the offered homeworks. |
Learning Outcomes
The course gives the basic knowledge on motor drives. After the course, the students are able to choose the motor and converter with correct size to the defined application. Students know, how the torque curves of the most typical loads look like and they know the effect of the torque curve to the choose of suitable drive. The students are able to calculate the required drive size both for continuous and for periodic, variable loading conditions according to maximum load and temperature. The students know the required protection functions required with the drives. The students know the basic structure and operation principle of DC machine, synchronous machine and induction machine. The students understand the basics about the control methods of the electric drives, especially scalar (U/f, Volts/Hz) control method.
Content
| Content | Core content | Complementary knowledge | Specialist knowledge |
| 1. | Typical torque curves, need of gears, protection of drives | Regenerative braking | Electric/hybrid vehicles, energy storages in electric vehiclses and working machines |
| 2. | Choose of the suitable drive (max current, power losses, temperature) | Detailed knowledge about the choose of motor drive | Active rectifier (AFE) and its effect to grid harmonics compared to diode rectifier |
| 3. | Operation principle, structure and applications of DC motors. Control of DC drive. | Effect of thyristor-rectifer to grid power quality. | Brushless DC drive (BLDC) |
| 4. | Operation principle, structure and applications of synchronous machines (permanent magnet machine). Control of synhronous motor drive. | Operation principle, structure and applications of reluctance machine. | Control of reluctance machine. |
| 5. | 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. | Operation principle, structure and applications of slip-ring machine. Direct torque control (DTC) method. | Operation principle and structure of DFIG. |
Study material
| Type | Name | Author | ISBN | URL | Additional information | Examination material |
| Lecture slides | Jenni Rekola | Yes |
Prerequisites
| Course | Mandatory/Advisable | Description |
| DEE-33116 Power Electronics Converters | Mandatory |
Additional information about prerequisites
The basic knowledge about the power converters and their modulation methods is required. The basic knowledge about control theory, especially the operation principle of PI-controller, is required. In addition, the basic knowledge about the structure of the DC-motor, induction motor and synchronous motor recommended.
Correspondence of content
| Course | Corresponds course | Description |
| DEE-33036 Electric Drives, 5 cr | DEE-33030 Motor Drives, 5 cr |