1. Electromechanical Systems MST @ MSU 2006 Jeff Rhoads and Terry Ballinger

2. Electromechanical Systems Electromechanical Systems have Integrated Mechanical and Electrical Components Electromechanical Systems have Integrated Mechanical and Electrical Components

3. Basic Electricity Voltage: energy required to move a charge from one point to another Voltage: energy required to move a charge from one point to another

4. Basic Electricity Voltage: energy required to move a charge from one point to another Voltage: energy required to move a charge from one point to another Current: a measure of the amount of charge passing through a substance Current: a measure of the amount of charge passing through a substance

5. Basic Electricity Voltage: energy required to move a charge from one point to another Voltage: energy required to move a charge from one point to another Current: a measure of the amount of charge passing through a substance Current: a measure of the amount of charge passing through a substance Resistance: a measure of the resistance to current flow Resistance: a measure of the resistance to current flow

6. Basic Electricity Voltage: energy required to move a charge from one point to another Voltage: energy required to move a charge from one point to another Current: a measure of the amount of charge passing through a substance Current: a measure of the amount of charge passing through a substance Resistance: a measure of the resistance to current flow Resistance: a measure of the resistance to current flow Ohm’s Law: Voltage = Current x Resistance Ohm’s Law: Voltage = Current x Resistance

7. Basic Electricity A Simple Circuit… A Simple Circuit…

8. Basic Electricity A Simple Circuit… A Simple Circuit… V

9. Basic Electricity A Simple Circuit… A Simple Circuit… V V load

10. Basic Electricity A Simple Circuit… A Simple Circuit… V I

11. Basic Magnetism Poles/Attraction Poles/Attraction

12. Basic Electromagnetism Electromagnets Electromagnets Lorentz Force Lorentz Force

13. Case Study I: Speakers

14. Speakers

15. Audible Range Young Adults Can Typically Hear Sounds Between 20 Hz and 20 kHz

16. Case Study II: Electric Motor

17. Electric Motor

19. Generators The Systems Used to Generate Electricity (Generators) are Almost Identical to Motors

20. Today’s Activity

21. Electric Motor Objective Create an electric motor capable of achieving maximum rotational speed.

22. Design Considerations Coil Design Coil Design Geometry Geometry Number of Loops Number of Loops Force vs. Inertia Force vs. Inertia Balance Balance Magnet Placement Magnet Placement Coil Placement Coil Placement Contact Surfaces Contact Surfaces

23. Measurement Procedures What is the best way to determine the rate of rotation?