KB013: DC Motor

KEY TAKE AWAY POINTS:

Simply, by using the natural pulling(S-N) / pushing(S-S, N-N) force from the magnets🧲 (natural/electro)
Flowing current generates electromagnet🧲⚡, current direction decides poles placing
Switching voltage "direction" perfectly drives current direction changing, making exactly right electromagnet🧲⚡ poles

Do You Know...?

🧲Magnet has natural pushing/pulling force!

Just as

🧲Magnet has 2 poles South, North

Opposite poles attract (pull) each other

S-><-N

Same poles push each other away

S<-->S

N<-->N

🧲Magnets are found from

Natural magnets are found in the earth and are rich in an iron mineral called magnetite
Man-made magnets are developed in a lab by taking metallic alloys and processing them to align the charge
Electro-magnet🧲⚡ is generated by flowing electric current⚡ temporarily

🧲⚡Electromagnet poles can be switched

Decided by

What makes the rotation happening❓

Simply, by using the natural pulling(S-N) / pushing(S-S, N-N) force from the magnets🧲!
- 2 sets of magnets
  - 1 is fixed magnet 🧲 (outer part here)
  - 1 is poles-altering electromagnet 🧲⚡ (inner part here)

What affects the rotation speed❓

Magnetic🧲 field strength of the fixed magnets
Electromagnet🧲⚡ strength of the rotator
- Current strength
  (driven by battery voltage level🔋)
- Number of loops

What affects the rotation direction❓

The electromagnet🧲⚡ poles direction
- Decided by the direction of current flow
  - Affected by the voltage "direction"
    - Smartly controlled by the half-half contactors

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