1. McTronX: Proudly South African magnetic bearing solutions G van Schoor

2. Overview PresentPastVision 1.Present... who we are 2.Past... where we come from 3.Future... our vision

3. McTronX @ present  Research group in the Engineering faculty at the North-West University  Research focus:  Self-sensing AMBs  AMB retainer bearings  Advanced modelling and control  PMSM machines  Industrial focus:  High-speed AMB systems: flywheels and blowers PresentPastVision

4. Structure, support & collaboration Industry sponsor Collaboration McTronX Permanent personnel Postgraduate students Research division Industrial division AMBs, power electronics Electrical machines & drives Modelling & control Signal processing High level software Analogue systems Mechanical systems AMBs, power electronics Embedded control Analogue systems Mechanical systems Ph.D. Masters PresentPastVision

5. Current expertise Power electronics AMB design Modelling & control Embedded systems Sensors & self-sensing Retainer bearings PMSM design & control Artificial intelligence Permanent personnel... Students... PhD candidate M (2) PhD candidate PhD candidate (2) PhD candidate PhD candidate M M (4) M (2) 7 16 PresentPast

6. Current expertise Power electronics AMB design Modelling & control Embedded systems Sensors & self-sensing Retainer bearings PMSM design & control Artificial intelligence PresentPast Mechanical design Vibration analysis Rotor- dynamics Strength analysis Thermal analysis

7. Summary: 2003 - 2009 Year Cost: students Cost: personnel Costs: laboratory Costs: projects Total costs Completed Masters Completed PhDs PresentPastVision 2003 0 0 R 0.4 M R 0 M R 0.1 M R 0.6 M 4 0 2004 R 0.88 M R 0 M R 0.4 M R 0.1 M R 1.38 M 6 0 2005 R 1.15 M R 0.2 M R 0.4 M R 0.1 M R 1.85 M 2006 7 0 R 1.35 M R 0.25 M R 0.35 M R 0.15 M R 2.1 M 2007 5 3 R 1.6 M R 0.4 M R 0.15 M R 2.3 M 2008 4 2 R 1.4 M R 1.1 M R 0.17 M R 0.5 M R 3.17 M 2009 n/a R 1.6 M R 0.05 M R 1.6 M R 4.85 M Total R 3.55 M R 8.38 M R 1.62 M R 2.7 M R 16.25 M 26 5 Power Amplifiers Single AMBsFly-UPSTwinsADES: Analog Drive Electronic System 100 kW blower system + retainer bearing test-bed Double AMB Condition monitoring on AMB-suspended systems Fault classification of main power system in PBMR Self-sensing Modelling of coupled thermo-hydraulic systems Self-sensing

8. 2003: 1-DOF axial AMB 2003200420052006200720082009 * 1-DOF AMBs 2010 Level of expertise PresentPastVision 1-DOF axial AMB PA: linear Sensor: inductive Control: dSpace 2 kg disk 3 mm gap 250 N force

9. 2003: 2-DOF radial AMB 2003200420052006200720082009 * 1-DOF AMBs 2010 Level of expertise PresentPastVision 2-DOF radial AMB (homopolar) PA: linear Sensor: inductive Control: dSpace 2 kg shaft 1 mm gap 100 N force

10. 2004: Double radial AMB 2003200420052006200720082009 * 1-DOF AMBs * Double AMB 2010 Level of expertise PresentPastVision 7.7 / 14 kg shaft (rigid / flexible) 0.6 mm gap 500 N force 2004 4-DOF radial AMBs (heteropolar) PA: switch-mode Sensor: eddy current Control: dSpace 2003 2-DOF radial AMB (homopolar) PA: linear Sensor: inductive Control: dSpace

11. 2007: Flywheel system (Fly-UPS) 2003200420052006200720082009 * * 1-DOF AMBs * Double AMB * Power amplifiers * Fly-UPS Integrated controller 2010 Level of expertise PresentPastVision Specifications: 600 kJ 18 kg 30 000 rpm 0.5 mm 150 N radial, 520 N axial 2 kW PMSM 300 W for 30 min

12. Progression: 2005 - 2007 2003200420052006200720082009 * * 1-DOF AMBs * Double AMB * Power amplifiers * Fly-UPS Integrated controller 2010 Level of expertise PresentPastVision 2007 5-DOF AMB system Control: dSpace (stand-alone) Single-board computer PMSM 2005 4-DOF radial AMBs Control: dSpace Air-turbine Rotor/flywheel PMSM

13. 2007: Integrated controller 2003200420052006200720082009 * * 1-DOF AMBs * Double AMB * Power amplifiers 2010 Level of expertise PresentPastVision Purpose: AMB drive Self-sensing AMB embedded control 3-level piggy backed system consisting of: Analogue interface circuitry FPGA and DSP Power amplifiers

14. 2008: Twins 2003200420052006200720082009 * * 1-DOF AMBs * Double AMB * Power amplifiers * Fly-UPS Integrated controller * Twins Blower support Self- sensing 2010 Level of expertise PresentPastVision Summary: Two in-house designed 2-pole, 3- phase PMSMs Mechanically coupled Both motor/generator modes Versatile platform for testing advanced motor control strategies Roller element bearings Tested up to 30,000 rpm in a specially built test chamber.

15. 2008: Blower support 2003200420052006200720082009 * * 1-DOF AMBs * Double AMB * Power amplifiers * Fly-UPS Integrated controller * Twins Blower support Self- sensing 2010 Level of expertise PresentPastVision Successful re-commissioning of AMB suspended HTF blower AMB system support: On-site fault finding Analysis of AMB system Recommendations System tested to within specifications Valuable support to local industry

16. 2008: Self-sensing 2003200420052006200720082009 * * 1-DOF AMBs * Double AMB * Power amplifiers * Fly-UPS Integrated controller * Twins Blower support Self- sensing 2010 Level of expertise PresentPastVision Definition: self-sensing estimates the rotor position by monitoring the electrical impedance of the actuator (the stator magnet coils). Hardware implementation via in-house developed integrated controller card.

17. Current projects 2003200420052006200720082009 * * 1-DOF AMBs * Double AMB * Power amplifiers * Fly-UPS Integrated controller * Twins Blower support Self- sensing * ADES RDS 2010 Level of expertise PresentPastVision

18. ADES: AMB and Drive Electronics System PresentPastVision Main functions: Actively control an AMB system AMB condition monitoring Drive a 3-phase Permanent Magnet Synchronous Motor (PMSM) Provide comprehensive user interfacing Purpose: to develop an AMB control system that meets industrial standards

19. RDS: Rotor Delevitation System  In-house software for the analysis (and selection) of retainer bearings.  Test-bench for delevitation tests  Modelling of advanced back-up bearings PresentPastVision

20. Our Vision  Medium term: Support of existing AMB systems in local industry  Longer term: Development of proudly South African high- speed AMB solutions PresentPastVision

21. Based on our current expertise Power electronics AMB design Modelling & control Embedded systems Sensors & self-sensing Retainer bearings PMSM design & control Artificial intelligence Permanent personnel... Students... PhD candidate PhD candidate M (2) PhD candidate PhD candidate (2) PhD candidate PhD candidate M M (4) M (2) 7 16

22. The next step is... 2003200420052006200720082009 * * 1-DOF AMBs * Double AMB * Power amplifiers * Fly-UPS Integrated controller * Twins Blower support Self- sensing * ADES RDS 2010 * Industrial Level of expertise PresentPastVision To demonstrate our expertise in an industrial setting, typically high- speed blowers.

23. Thank you

24. What is an AMB?  AMB = Active Magnetic Bearing Controllers Rotor Power Amplifiers & Drives Electromagnet Sensors Motor