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Elect principles 2 max power transfer

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DC Networks – Maximum Power Transfer Maximum power is transferred from a source to a load when the load resistance is of the same value as the internal resistance of the source. This theorem also applies to AC circuits in which case resistance is replaced by impedance. Using the Thevenin equivalent maximum power is transferred to the load when RLOAD = RTH. RTH VTH RLOAD PLOAD = I2 RLOADPSOURCE = I2 RTH I
DC Networks – Maximum Power Transfer Maximum power is transferred from a source to a load when the load resistance is of the same value as the internal resistance of the source. Using the Thevenin equivalent maximum power is transferred to the load when RLOAD = RTH. 47.50 48.00 48.50 49.00 49.50 50.00 50.50 1.4 1.6 1.8 2 2.2 2.4 2.6 2.8 RLOAD PLOAD RLOAD VTH 20V R TH 2Ω
Activity 1. For the example shown determine the value of load resistor RL that would result in maximum power dissipation in this load and the value of this power. DC Networks – Maximum Power Transfer 2. For the above example determine the power dissipated in both the load and source when the load value is adjusted to ±20% . B A RL rint = 1Ω E = 20V R2 = 6Ω R1= 8Ω

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Elect principles 2 max power transfer

  • 1. DC Networks – Maximum Power Transfer Maximum power is transferred from a source to a load when the load resistance is of the same value as the internal resistance of the source. This theorem also applies to AC circuits in which case resistance is replaced by impedance. Using the Thevenin equivalent maximum power is transferred to the load when RLOAD = RTH. RTH VTH RLOAD PLOAD = I2 RLOADPSOURCE = I2 RTH I
  • 2. DC Networks – Maximum Power Transfer Maximum power is transferred from a source to a load when the load resistance is of the same value as the internal resistance of the source. Using the Thevenin equivalent maximum power is transferred to the load when RLOAD = RTH. 47.50 48.00 48.50 49.00 49.50 50.00 50.50 1.4 1.6 1.8 2 2.2 2.4 2.6 2.8 RLOAD PLOAD RLOAD VTH 20V R TH 2Ω
  • 3. Activity 1. For the example shown determine the value of load resistor RL that would result in maximum power dissipation in this load and the value of this power. DC Networks – Maximum Power Transfer 2. For the above example determine the power dissipated in both the load and source when the load value is adjusted to ±20% . B A RL rint = 1Ω E = 20V R2 = 6Ω R1= 8Ω