Instead of applying a steady, continuous voltage or current, pulsed excitation delivers energy in short, sharp bursts with pauses in between. Think of it as the difference between pushing a swing with a constant force (leaning on it) versus giving it a sharp push at exactly the right moment and then letting go.
The sharp edges of the pulses — the fast rising and falling transitions — are what make pulsed excitation interesting. A fast-rising pulse contains energy across a wide range of frequencies (a perfect square wave contains all odd harmonics). When that wide-bandwidth pulse hits a non-linear element in a resonant system, the system selectively amplifies certain frequencies and suppresses others.
Why it matters for Open Energy
Pulsed excitation is the third element of the meta-pattern. 312 of 768 patents describe it as a core operating feature. The patents that include all three elements — non-linearity, resonance, and pulsed excitation — have 3.2x more detailed measurement sections on average.
The practical observation across the patent literature is consistent: the continuous version of a circuit almost always performs worse than the pulsed version. Pulsed DC electrolysis produces more gas per watt-hour than continuous DC. Pulsed excitation of plasma tubes produces different spectral behavior than continuous drive. Pulsed drive of inductors produces back-EMF spikes that the circuit can potentially recover.
Everyday examples
- A camera flash: stores energy slowly in a capacitor, releases it in a microsecond pulse
- A defibrillator: same principle, much larger scale
- Percussion: a drum produces sound because the strike is a sharp impulse, not a steady push
In the experiments
The Pulsed vs Steady DC Electrolysis experiment directly compares continuous and pulsed drive. The Capacitor Discharge Through Inductor experiment studies what happens when stored energy is released in a single pulse. The Back-EMF Energy Recovery experiment captures the energy kicked back by an inductor after each pulse.