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NiHaoMike · 10-03-2008, 07:39 PM

A H bridge ("full bridge") has more parts than a half bridge and is actually more likely to fail. We're dealing with peak powers of a few hundred watts at most at a low duty cycle. The average power will be quite low, probably 80w or so at most for all the cylinders.

I don't think there'll be too many issues with EMI. The metal of the car would make a Faraday cage. Remember that arc welding equipment is orders of magnitude more powerful than what we're dealing with, is (for the most part) unshielded, and yet it still isn't as much of an EMI problem as you would think. At one site (a metal shop classroom), the simultaneous operation of several arc welders in nearby welding booths (which are contained only with fireproof fabric, no EMI reduction at all) had no effects on the wireless network connection for a laser CNC machine just 15 feet or so away.

10-03-2008, 07:39 PM	#23 (permalink)
NiHaoMike Master EcoModder Join Date: Sep 2008 Location: Texas Posts: 632 Thanks: 0 Thanked 26 Times in 24 Posts	A H bridge ("full bridge") has more parts than a half bridge and is actually more likely to fail. We're dealing with peak powers of a few hundred watts at most at a low duty cycle. The average power will be quite low, probably 80w or so at most for all the cylinders. I don't think there'll be too many issues with EMI. The metal of the car would make a Faraday cage. Remember that arc welding equipment is orders of magnitude more powerful than what we're dealing with, is (for the most part) unshielded, and yet it still isn't as much of an EMI problem as you would think. At one site (a metal shop classroom), the simultaneous operation of several arc welders in nearby welding booths (which are contained only with fireproof fabric, no EMI reduction at all) had no effects on the wireless network connection for a laser CNC machine just 15 feet or so away. __________________ If America manages to eliminate obesity, we would save as much fuel as if every American were to stop driving for three days every year. To be slender like Tiffany Yep is to be a real hypermiler... Allie Moore and I have a combined carbon footprint much smaller than that of one average American...