What is the difference between AC and DC in motorcycle engines?

[ElliotDella]

Specific differences between AC ignition and DC ignition in motorcycles: Power supply method: DC ignition is powered by the battery and is relatively stable; AC ignition is powered by the magneto charging winding, and the voltage level is determined by the engine speed. Ignition voltage: Since the DC igniter is powered by the battery, the minimum continuous ignition speed is hardly affected by the engine and can reliably operate at less than 100r/min. Moreover, the ignition energy remains consistent at both high and low speeds because the igniter has an internal ignition charging voltage stabilization circuit, keeping the voltage of the ignition capacitor at 200v. However, the voltage on the ignition capacitor of the AC igniter varies. When the engine speed is around 500r/min, the peak voltage of the capacitor is about 70v. When the speed rises to 3500r/min, the capacitor voltage reaches its peak at approximately 250v, at which point the ignition energy is also the highest. Within the range of 3500r/min to 5000r/min, the capacitor voltage stabilizes at around 130v.