1. Home
  2. Car Maintenance
  3. charge battery while battery still connected?
  4. Page 2

charge battery while battery still connected?

I'd suggest you put a 'scope across the battery in your car with the engine running and see just how clean the DC is...

But any sensitive silicon devices in the ECU will already be protected by a voltage regulator - they need that to function correctly off the very dirty and varying DC supply in a car. The actual DC voltage input can vary by about 50% between cranking on a cold day and full charge from the alternator.

They're three phase because this is a more efficient way of generating power. Especially with the very wide rev range.

Reply to
Dave Plowman (News)
Loading thread data ...

My Mother, a schoolteacher, once left her lights on and flattened the battery. So a helpful physics teacher charged the battery up for her.

(you can guess the punchline)

Reply to
Andy Dingley

He'd make a good subject for an Amstrong & Miller sketch. "... after causing the leak at 3 Mile Island, I worked in the Ukraine for a few years, but found myself out of work following a small upset at the plant ... so I became a physics teacher."

Reply to
Willy Eckerslyke

Your Dad used to be a physics teacher?

Reply to
adder1969

A single phase alternator, for the same power output would be huge, the same as a singe phase motor Vs 3 phase! Just a thought!

Reply to
Pat Crouch

Well about 30% larger, startup torque etc. isn't an issue on an alternator & you don't care which way it's spinning.

Reply to
Duncan Wood

MotorsForum website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.