Easy current and voltage average calculator

105

01:11:17

These two circuits can be used to calculate the average of current (cap circuit) and voltage (inductor circuit). Just connect the inputs of the controlled sources to the current or voltage of interest. The procedure is as follows, if you are averaging current first set the cap value to the period of the input current and close the switch for a single period of the input current then observe the average value as the voltage on the capacitor. To average voltage set the inductor value to the period of the input voltage and open the switch for one period of the input voltage then the averaged value will be the current in the inductor. 
I used this method to quickly calculate the efficieny of an SMPS i built, it'll save you the time and hassle, trust me.

published 8 years ago

hurz

8 years ago

Call it integrator or low pass filter or averaging circuit. Its all the same. RC RL discret or with transistor or with OpAmps. You are integrating only positive values into infinity values. Because your integrator is perfect and doesnt has looses, it will always go into negative or positive infinite results. Also the start value will be undefined and cause problems, specially in OpAmp implementations. Even the smallest delta while startup will be integrated into saturation. To avoid that you need in parallel to the integrating cap a resistor, to be not so perfect 😁

carlos2201

8 years ago

Pure shit

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