Sensorless Control of Induction Machines

1. Sensorless Control of Induction Machines Reiko Raute Dr. Mark Sumner Dr. Cedric Caruana Prof. Greg Asher Dr. Cyril Spiteri Staines Dr. Joseph Cilia Slide: 1

2. Outline of Presentation 1. Sensorless control of induction machines 2. Machine rig 3. FPGA board 4. First Results 5. Summary Slide: 2

3. 1. Sensorless control of induction machines Slide: 3

4. 1. Sensorless control of induction machines Slide: 4

5. 2. Machine rig setup Designed machine rig and drive units: Slide: 5

6. 2. Machine rig setup Slide: 6

7. 3. FPGA board design Slide: 7

8. 3. FPGA board design Designed FPGA periphery board for DSK 6713C: Slide: 8

9. 3. FPGA board design Designed FPGA periphery board for DSK 6713C: Slide: 9

10. 3. FPGA board design Features of the FPGA program: • Runs synchronized to DSK board at 45 MHz • PWM timer unit (with test vector generation capability) • ADC trigger unit (selectable sample frequency and synchronization to PWM) • Encoder interface (with filter and timing unit for speed measurement) • Trip handling unit incl. Watch dog timer(selectable trip sources) Slide: 10

11. 4. First Results Used control structure (Id*=5.8A, Iq*=6A): Slide: 11

12. 4. First Results Rotor flux position estimation at rated torque (Id*=5.8A, Iq*=6A): Slide: 12

13. 5. Summary • Set up of experimental machine rig • Designed of FPGA periphery board for using the DSK 6713C board in motor control applications • First sensorless algorithm, which shows precise rotor flux estimation at low speed incl. zero mechanical speed at rated torque (no PWM switching patterns modification and only use of standard current transducer) Slide: 13