1. Teaching the Concept of Marlon Flores Sacedon Visayas State University Visca, Baybay, Leyte Oct. 23, 2009 Visayas State University Visca, Baybay, Leyte Oct. 23, 2009 DC Motor Using computer animations

2. Objective The paper aims to provide the secondary and tertiary Physics teachers an instructional material in teaching the concepts of DC Motor using geometric animated presentation created in Microsoft Powerpoint software.

3. No one needs to be reminded of the importance of electric motors in contemporary society.

4. A DC motor is an electric motor that runs on direct current (DC) electricity. What is a DC motor?

5. Examples of DC Motors

6. Toy DC motors

7. The St. Louis DC Motor The St. Louis DC Motor

8. How does a DC motor work?

9. In a motor a magnetic moment acts on a current- carrying conductor, and electric energy is converted to mechanical energy. + - I Magnetic moment I = electric current (amp) A = cross section area of conductor µ = IA Magnetic wire conductor CIRCULAR LOOP CONDUCTION

10. S + - DC Supply N Rotor (Magnet wire) Single CoilDC Motor Apparatus Single Coil DC Motor Apparatus

11. S + - DC Supply N Single CoilDC Motor Apparatus Single Coil DC Motor Apparatus Rotor (Magnet wire)

12. S + - DC Supply N Single CoilDC Motor Apparatus Single Coil DC Motor Apparatus Rotor (Magnet wire)

13. N + - DC Supply S B Rotation axis Rotor (Magnet wire) I I I I I I I Single CoilDC Motor System Single Coil DC Motor System + - DC Supply Permanent magnets commutator brush µ = magnetic moment (A.m 2 ) B = magnetic field (Tesla) τ = torque B

14. S N + - DC Supply S B N I I I I I I I Single CoilDC Motor Apparatus Single Coil DC Motor Apparatus + - DC Supply B

15. S N + - S B N I I I I I I I Single CoilDC Motor Apparatus Single Coil DC Motor Apparatus + - DC Supply B

16. S B + - N I I I I I I I Single CoilDC Motor Apparatus Single Coil DC Motor Apparatus

17. S B + - DC Supply N I I I I I I I Single CoilDC Motor Apparatus Single Coil DC Motor Apparatus I I I I

18. S + - DC Supply N I=0 Single CoilDC Motor Apparatus Single Coil DC Motor Apparatus B I I I I I

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20. S B + - DC Supply N I I I I I I I Single CoilDC Motor Apparatus Single Coil DC Motor Apparatus Run

21. + I I - Magnetic field lines Torque moment Current Magnetic wire Solenoid (Electromagnet) Iron core

22. S + - DC Supply N I I I I Multiple CoilDC Motor Apparatus Multiple Coil DC Motor Apparatus I B + - DC Supply I commutator brush Magnet wire

23. S + - DC Supply N I I I I Multiple CoilDC Motor Apparatus Multiple Coil DC Motor Apparatus B I

24. S + - DC Supply N I I I I Multiple CoilDC Motor Apparatus Multiple Coil DC Motor Apparatus B I

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27. S + - DC Supply N I I I I Multiple CoilDC Motor Apparatus Multiple Coil DC Motor Apparatus B I

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32. S + - DC Supply N I I I I Multiple CoilDC Motor Apparatus Multiple Coil DC Motor Apparatus B I

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34. S + - DC Supply N I I I I Multiple CoilDC Motor Apparatus Multiple Coil DC Motor Apparatus B I attract repel

35. S + - DC Supply N I I I I Multiple CoilDC Motor Apparatus Multiple Coil DC Motor Apparatus B Run

39. Do it yourself!

40. 1 pc. Dry cell battery size AA 1 pc. A battery holder or Tyro foam 1 pc. Permanent magnet 3 feet Magnet wire gauge 20 or thicker 1 foot Connecting wire 1 pc. cutter 1 pc. Dry cell battery size AA 1 pc. A battery holder or Tyro foam 1 pc. Permanent magnet 3 feet Magnet wire gauge 20 or thicker 1 foot Connecting wire 1 pc. cutter Materials

46. + _ S N   B

47. + _ S N   B

52. S B + - DC Supply N I I I I I I I Single CoilDC Motor Apparatus Single Coil DC Motor Apparatus

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109. S + - DC Supply N I I I I Multiple CoilDC Motor Apparatus Multiple Coil DC Motor Apparatus B

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