nuckolls.bob(at)aeroelect
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 Posted: Thu Jul 30, 2020 11:50 am Post subject: Possible Brownout Protection Device |
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At 06:29 PM 4/1/2019, you wrote:
| Quote: | --> AeroElectric-List message posted by: "user9253" <fransew(at)gmail.com>
There needs to be a diode in the existing main power bus to prevent the DC-DC converter current from flowing to the starter.
Otherwise, that DC-DC converter will be unable to maintain 12 volts. |
???? as shown in the z-drawings, brownout boosters are
switched to support ONLY the e-bus . . . just milliseconds
before the starter contactors close . . . and for as long
as the starter button is held closed. The "normal feed"
path includes the requisite diode.
| Quote: | Depending on load, the DC-DC converter with a 5 amp
rating might have trouble maintaining 12 volts, let
alone putting out 33 volts. |
33 volts? No . . . only 14v. We're keeping the
e-bus supported at 14 volts for the cranking
interval that the battery is below 11 volts.
Bob . . .
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