1. © 2008 Eaton Corporation. All rights reserved. This is a photographic template – your photograph should fit precisely within this rectangle. Practical AC Circuits Dr. Phillip Hunter

2. 2 2 Practical AC Circuits Eaton - Christchurch Job Overview Rectifier Design Resonant Power Conversion

3. 3 3 Eaton Corporation Diversified power management company ~75,000 employees worldwide (2008 Sales $15.4 billion) Truck Automotive Aerospace Hydraulics Electrical Telecommunications Power, Christchurch ~130 Staff

4. 4 4 Telecommunications Power Systems

5. 5 5 Rectifier Design EMC Filter EMC Filter DC-DC PFC 230V AC48V DC400V DC

6. 6 6 Power Factor Corrector (PFC) Convert AC to DC Draw sinusoidal current from the mains Charge the bulk storage capacitors

7. 7 7 Power Factor Corrector (PFC) Switch Closed Inductor stores energy Switch Opened Inductor energy is transferred to output

8. 8 8 DC-DC Provide electrical isolation Output voltage control / regulation 400V DC 48V DC

9. 9 9 DC-DC Output Voltage is adjusted by on time

10. 10 DC-DC L L C Frequency adjusts output voltage

11. 11 ‘Soft’ Switching Inductive load and Switch capacitance needed for ‘Zero Voltage Switch’

12. 12 High Frequency Magnetics Transformer Construction

13. 13 Simulation SPICE (Simulation Program with Integrated Circuit Emphasis) Developed 1960 & 70s at the Electronics Research Laboratory of the University of California, Berkeley PSPICE - SPICE for a Personal Computer First released 1984 Convergence issues with power electronic ‘switching’ circuits due to default tolerance settings can be overcome

14. 14 Simulation - Time Domain

15. 15 Simulation - Frequency Domain

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