(02-27-2025, 11:01 AM)Fielaposa napisał(a): Using PWM to control a boiler’s power level instead of just switching it on and off is Drive Mad an interesting idea, but it depends on several factors. In theory, SSRs (solid-state relays) with PWM control can modulate power output, but boilers typically require stable power and specific duty cycles for efficient operation. If your LK system can generate a PWM signal and the SSR can handle the boiler’s load, it might work. However, safety is a major concern—modulating power like this could affect the boiler’s efficiency, temperature regulation, and even its lifespan. You might also need a feedback loop to adjust power based on battery charge levels dynamically.
IF you power directly heater in boiler, it can be PWM with duty cycle. From my observation SSR not work properly for small duty and higher frequency (like 10Hz), but few Hz can give quite good control.
I tested with high power halogen bulb to see behavior well with me new prototype of controller:
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