Auto charging system:will it work?

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 This circuit is designed by dushyant kumar in 2021




Let’s understand the concept

* Battery A (initially charged) runs the motor.

* The motor spins the dynamo.

* The dynamo attempts to charge Battery B (initially low).

* Once Battery A is depleted, you switch the roles: Battery B then runs the motor, and the dynamo attempts to charge Battery A.

This is still, unfortunately, a design that falls under the category of a “perpetual motion machine of the first kind,” which is impossible according to the fundamental laws of thermodynamics.

But why the circuit still fail in auto charging

* Law of Conservation of Energy (First Law of Thermodynamics): Energy cannot be created or destroyed, only transformed from one form to another. In any energy conversion, there are always losses.

* Efficiency is always less than 100%:

   * Battery A to Motor: A battery has internal resistance, and motors have inefficiencies (heat loss, friction, air resistance, core losses in windings). Let’s say a good DC motor is 80-90% efficient.

   * Motor to Dynamo (Generator): The mechanical coupling between the motor and dynamo will have friction. The dynamo itself (which is essentially a motor running in reverse) also has inefficiencies (winding resistance, magnetic losses, mechanical friction). A good dynamo might be 70-85% efficient.

   * Dynamo to Battery B: The electrical output of the dynamo might need rectification (converting AC to DC if it’s an AC generator, or smoothing a pulsed DC from a DC generator) and voltage regulation. These processes introduce more losses. The battery itself is not 100% efficient during charging (some energy is converted to heat). Battery charging efficiency can range from 70-95% depending on the chemistry and charge rate.

The combined efficiency of the entire loop (Battery -> Motor -> Dynamo -> Battery) will be the product of all these individual efficiencies, which will be significantly less than 100%.

Let’s use some illustrative numbers:

* Motor efficiency: 85% (0.85)

* Dynamo efficiency: 80% (0.80)

* Charging circuit/battery charging efficiency: 80% (0.80)

Total round-trip efficiency: 0.85 \times 0.80 \times 0.80 = 0.544 or 54.4%

This means for every 100 units of energy you take out of Battery A, only about 54.4 units of energy make it into Battery B.

So, when Battery A is depleted, Battery B will have significantly less energy than Battery A started with. If you then try to use Battery B to charge Battery A, Battery A will receive even less energy, and the cycle will quickly die out.

It’s like trying to keep two buckets full by repeatedly pouring water from one into the other using a leaky dipper. Both buckets will eventually become empty.

This concept is a well-known thought experiment used to demonstrate why perpetual motion is impossible. To charge a battery, you always need an external energy source that provides more energy than the losses in your charging system.

We can use solar for giving external energy which is quite better than using solar alone



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