Underlying Technological Generations

This work presents the evolution of electrical weeding power modules, categorized into four generations (Gen. 0, 1, 2, and 3), focusing on improvements in safety, efficiency, and energy control. Gen. 0. was a low-frequency voltage supply with manual controls for the voltage. Gen. 1 relied on low-frequency, analog, or rudimentary digital controls with limited performance and high operational risk. Gen. 2 introduced high-frequency inverter-based systems with active current and voltage regulation, modular transformers, and pulse modulation strategies for improved energy application and weed control. Gen. 3, the latest innovation, eliminates the need for complex active controls through self-adjusting power delivery using a high-frequency inverter, harmonic filtering, and capacitive voltage multipliers and impedance matchers. This architecture ensures constant power across variable plant–soil resistive loads while minimizing parasitic voltage spikes. The system reduces size, weight, cost, and energy waste, while enhancing robustness and precision. It marks a paradigm shift in electrical weed control, achieving high power-factor performance with passive stability and scalable design for commercial deployment.