MECH 26

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MECH 26 Power Equipment Electrical Systems
The Atom Where Electrical The Systems Begins
A Copper Atom
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MECH 26 Power Equipment Electrical Systems
The Basic Structure of an Atom
Atoms will have the same number of Electrons in
the orbit as there are Protons in the center.
Electrons (29 total)
Valence Ring (Outer Ring)
Protons (29 total)
A Copper Atom
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MECH 26 Power Equipment Electrical Systems
The Basic Structure of an Atom
Elements with less than 4 Electrons in their
outer rings make good conductors
Because the Electrons are easily dislodged from
their orbit and pushed to the atom next to them.
(Electron flow)
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MECH 26 Power Equipment Electrical Systems
The Basic Structure of an Atom
Elements with More than 4 Electrons in their
outer rings make good insulators
Because the Electrons remain in the outer rings
when electromotive force ( Voltage) is present.
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MECH 26 Power Equipment Electrical Systems
How dose electricity flow? What causes electrons
to move from atom to atom?
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MECH 26 Power Equipment Electrical Systems
How dose electricity flow? What causes electrons
to move from atom to atom?
Positive Charged Atom
Negative Charged Atom
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Too Many Electrons
Too Few Electrons
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MECH 26 Power Equipment Electrical Systems
How dose electricity flow? What causes electrons
to move from atom to atom?
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Voltage
(Pressure)
(Electromotive Force)
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Voltage Pushes the electrons
Voltage Pushes the electrons
Voltage Pushes the electrons
Voltage Pushes the electrons
Voltage Pushes the electrons
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MECH 26 Power Equipment Electrical Systems
How dose electricity flow? What causes electrons
to move from atom to atom?
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Voltage
(Pressure)
(Electromotive Force)
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Voltage Pushes the electrons
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MECH 26 Power Equipment Electrical Systems
How dose electricity flow? What causes electrons
to move from atom to atom?
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Voltage Pushes the electrons
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MECH 26 Power Equipment Electrical Systems
How dose electricity flow? What causes electrons
to move from atom to atom?
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Voltage
(Pressure)
(Electromotive Force)
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The flow of the electrons is referred to as
Current
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MECH 26 Power Equipment Electrical Systems
How dose electricity flow? What causes electrons
to move from atom to atom?
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Electron Flow is measured in Amps
The flow of the electrons is referred to as
Current
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MECH 26 Power Equipment Electrical Systems
How and why dose electricity flow in a circuit
Load or Resistor (light bulb)
Conductor (Wire)
Conductor (Wire)
Battery
Negative plates - Have too few electrons. Therefor
e they want to pull electrons from the positive
plates
Positive plates Have an excess of
electrons. Therefore they want to push excess
electrons away from the plates
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MECH 26 Power Equipment Electrical Systems
Electron flow from Positive to Negative
Discharges the battery
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MECH 26 Power Equipment Electrical Systems
Electron flow from Positive to Negative
Discharges the battery
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MECH 26 Power Equipment Electrical Systems
Electron flow from Positive to Negative
Discharges the battery
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MECH 26 Power Equipment Electrical Systems
Electron flow from Positive to Negative
Discharges the battery
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MECH 26 Power Equipment Electrical Systems
Electron flow from Positive to Negative
Discharges the battery
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MECH 26 Power Equipment Electrical Systems
Electron flow from Positive to Negative
Discharges the battery
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MECH 26 Power Equipment Electrical Systems
Electron flow from Positive to Negative
Discharges the battery
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MECH 26 Power Equipment Electrical Systems
Electron flow from Positive to Negative
Discharges the battery
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MECH 26 Power Equipment Electrical Systems
Electron flow from Positive to Negative
Discharges the battery
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MECH 26 Power Equipment Electrical Systems
Electron flow from Positive to Negative
Discharges the battery
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Electron flow from Positive to Negative
Discharges the battery
12.6 Volt
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Electron flow from Positive to Negative
Discharges the battery
Alternator
12.6 Volt
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MECH 26 Power Equipment Electrical Systems
Electron flow from Negative back to Positive
Charges the battery
Alternator
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MECH 26 Power Equipment Electrical Systems
Electron flow from Negative back to Positive
Charges the battery
Alternator
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MECH 26 Power Equipment Electrical Systems
Electron flow from Negative back to Positive
Charges the battery
Alternator
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MECH 26 Power Equipment Electrical Systems
Electron flow from Negative back to Positive
Charges the battery
Alternator
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MECH 26 Power Equipment Electrical Systems
Electron flow from Negative back to Positive
Charges the battery
Alternator
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MECH 26 Power Equipment Electrical Systems
Electron flow from Negative back to Positive
Charges the battery
Alternator
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MECH 26 Power Equipment Electrical Systems
Electron flow from Negative back to Positive
Charges the battery
Alternator
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MECH 26 Power Equipment Electrical Systems
Electron flow from Negative back to Positive
Charges the battery
Alternator
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MECH 26 Power Equipment Electrical Systems
Electron flow from Negative back to Positive
Charges the battery
Alternator
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MECH 26 Power Equipment Electrical Systems
Electron flow from Negative back to Positive
Charges the battery
Alternator
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MECH 26 Power Equipment Electrical Systems
Electron flow from Negative back to Positive
Charges the battery
Alternator
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MECH 26 Power Equipment Electrical Systems
Electron flow from Negative back to Positive
Charges the battery
Alternator
37
MECH 26 Power Equipment Electrical Systems
Review of Electrical Theory
1. If an atom has 29 Protons in its center, how
many Electrons will that atom have in orbit in
its rings? __________
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• An atom with too few electrons in its outer rings
  has a
• _____________ Charge.

Positive
3. An atom with many electrons in its outer
rings has a _____________ Charge.
Negative

• The force or pressure that electrons flow is
  known as
• ______________

Voltage
Current
5. The flow of electrons in a circuit is known
as _________
Amps
6. Current is measured in _____________

• The opposition to electron flow in a circuit is
  known as
• _____________

Resistance
8. Resistance is measured in __________.
Ohms
Omega
9. The sign that represents resistance is
___________
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MECH 26 Power Equipment Electrical Systems
Review of Electrical Theory

• Elements with ____________________________________
  
• make good conductors

fewer than 4 electrons in their outer rings

• Elements with ____________________________________
  
• make good insulators.

more than 4 electrons in their outer rings