Quote:
Originally Posted by paulgato
As for the PWM controller idea, that 10A PWM unit should be suitable for the heater blower but you might need to bypass it with a switch for the highest speed. At 12.5v my blower motor takes about 16A at full speed, 8A at speed 3, 4A at speed 2 and 2A at speed 1, and at 14.5v those motor loads will be proportionately higher of course, so 19A at full speed and 9.5A at speed 3. I got a 15A PWM so I would have to do the same thing and bypass it for speed 4.
...but why are you using a PWM for controlling DRL's? Are the DRL's on your car just the headlights fed via a resistor?
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I suspect 10A will be fine in the real world as the 3-4 settings are a bit too much really. Ideally, I want to buy a spare blower assembly to convert to brushless power.
I have a set of Phillips DRL8's. They use a PWM controller to improve effciency/life and dim them when the main beams are on. Problem is they are automatic so they switch off after ten seconds of EOC. A basic PWM controller will mean they're always on in the ACC position, with the option for dimming with main beam/ park light still there. I also like the idea of gradual dimming via an Arduino when the vehicle is stationary to further save power.