DC source operation modes

1. Idle mode corresponds to open source terminals, while the current in the load is absent I = 0, therefore Uxx = E and the power in the load

Pxx = E • I = 0

This mode is used to measure the emf source.

2. The short circuit mode is created when the source terminals are short-circuited, i.e. voltage on the load is zero, because its resistance is equal to zero Rн = 0, therefore, Un = 0 and the short-circuit current is determined: Iкз = E / Rвн = E • Gвн, usually this is an emergency mode at which Iom << Iкз, where Iom is the current for which the element is calculated . Power in the load in this case is equal to zero Рн = I² • Rн = 0.

3. Consistent operation of the source and load, when Rвн = Rн and is characterized by the maximum possible transmission power from the source to the receiver

source current

I = E / (Rvn + Rn)

source power

Pist = E • I = E² / (Rвн + Rн) = E² / 2Rвн

PH = 0.5 • Rist

receiver power (load)

Rn = UI = I² • Rn = RnE² / (Rnn + Rn) ² = E² / 4Rvn

4. Nominal mode - the operation of the source and receiver at the nominal values ​​of the currents and voltages for which they are designed.