Electrical Properties of Devices RLC
Electrical Properties ( คุณลักษณะทางไฟฟ้า ) Electrical PropertiesResistorCapacitorInductor Impedance (Z)Z R = X R Z C = -j X C Z L = j X L AC circuit (f > 0)X R = R X C = 1/2 fCX L = 2 fL DC circuit (f=0)X R = R X C = (after 5 C ) X L = 0 (after 5 L ) Time Constant ( ) - C = RC L = L/R Device Effect (DC)-Time delay Device Effect (AC)-Phase shift Ex. I T lead Vs Phase shift Ex. I T lag Vs Power True Power (Power lost in heat) Reactive Power (Accumulated power) Reactive Power (Accumulated power)
การ charge & discharge อุปกรณ์ ในวงจร DC = RC = L/R Charge: Energize: V F = Vsource V i = initial Voltage I F = I T (L short after 5 ) I i = initial current Capacitor Inductor
การ charge & discharge อุปกรณ์ ในวงจร DC = RC = L/R Discharge: V F = 0 V i = initial Voltage I F = I T I i = initial current Capacitor Inductor
Pulse Response Capacitor Inductor
Ex. RLC Circuit