Interesting point wrt windlass
motors throwing back spikes. I've seen tech papers from LumiLed or CreeX (who make those expensive top quality LEDs used in the auto industry) stating that the intended use MUST include design for protection from 200V spikes in cars, 600V spikes in trucks, because that's how high the spikes will be from the normal starters on board. Surely a windlass motor
fits somewhere into that range, so it would have the same problem.
Delco had gone to an automobile alternator
design some years ago with internal avalanche devices to protect the alternators from spikes, and earned a reputation for a lemon after they found out the spike protectors failed way before the alternators normally would have, resulting in an alternator
failure way too soon. Which is the mixed blessing that many designers and manufacturers have mentioned about spike protection: It needs to be kept external, outside of the devices, otherwise when it does fail it takes a whole "device" offline with it.
Since the average consumer doesn't know what a transient is and doesn't want to hear about more problems and costs....this one gets buried.
Last time I did a gut rewire on a boat, I added in an aluminum
panel box in between "the instruments" and their master breaker. The box contains one crowbar fuse, one piezo alarm
, and two different type of surge protectors (one zener and one zorb), set up so that any surge will either blow the fuse, set off the piezo, or get clamped before it can get out of the box.
But I don't think you could commercially market that kind of thing, who'd pay for it? "What, aren't my instruments and alternator GOOD ENOUGH?"