421022
UNIT 202
- Ac Theory
- Star Connection
- Delta Connection
- Star Connection
- Dc Theory
- Current
- The Unit is Amperes (A)
- The Unit is Amperes (A)
- EMF
- Unit of EMF is Volts (V)
- Unit of EMF is Volts (V)
- Resistance
- Measured in OHM'S
- The Formula Symbol R
- The Formula Symbol R
- Resistors in a series circuit
- R1
- R2
- R3
- R3
- R2
- RT= R1 + R2 + R3
- R1
- Measured in OHM'S
- Current
- Motors
- 3 Parts on a 3phrase
- Stator
- Electromagnets
- Rotor
- Rotor
- Stator
- single phase motors
- 3 Phrase motors
- 3 types of Motors
- Split Phase
- Capacitor start/capacitor - run motor
- Capacitor start/capacitor - run motor
- Capacitor
- Split Phase
- DC Motors Components
- Field - Stays still
- Commutator (Attached to the armature)
- Armature -moving part
- Flips Polarity on a DC Motors, acts as a switch
- Armature -moving part
- Carbon Brush
- Provide current to the moving part
- Conducts Elecricity
- Self Lubricating
- Conducts Elecricity
- Soft
- Provide current to the moving part
- Series
- Parallel
- Compound
- Parallel
- Field - Stays still
- DC Motor Components
- Poles
- Field Windings
- Armature
- Commutator
- Carbon Brushes
- Poles
- Synchronous Speed (ns)
- Speed of the magnetic field in the stator
- Ns ( rps ) = F/P
- Ns ( rpm ) = 60 X F / P
- Nr = Rotor speed
- Slip = Difference between Ns and Nr
- Per Unit Slip = Ns - Nr / Ns
- % Slip = Ns - Nr / Ns x 100
- Per Unit Slip = Ns - Nr / Ns
- Slip = Difference between Ns and Nr
- Speed of the magnetic field in the stator
- 3 Parts on a 3phrase
- Transformers
- Special Transformers
- Self inductance
- Equation for self Inductance :
L X ( L2 - L1 ) / T
- L = Value of Inductance in Henrys
- T = Time in seconds
- L1 and L2 = Values of Current
- L = Value of Inductance in Henrys
- Equation for self Inductance :
L X ( L2 - L1 ) / T
- Mutual Inductance
- Special Transformers
- Prefixs
- Kilo -> k -> 1x10^3
- mega -> M -> 1x10^6
- GIGA -> G -> 1x10^9
- Terra -> T -> 1x10^12
- milli -> m -> 1x10-3
- Micro -> yu -> 1x10-6
- nano -> n -> 1x10-9
- pico -> p -> 1x10-12
- Positive
- Negative
- Kilo -> k -> 1x10^3
- Floresent lighting
- Ultra-Violet, Unless
Phosphorus turns into
visible light
- Electrodes are parts at the
end of the lights
- Gas on the inside
- Electrodes are parts at the
end of the lights
- The Ballast ( Chalk )
- Limits The Lamps Operating
Current
- Provide the required voltage to
start the lamp
- Two Types
- Electromagnetic
- Electronic
- Electromagnetic
- Limits The Lamps Operating
Current
- Ultra-Violet, Unless
Phosphorus turns into
visible light
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