Wednesday, June 3, 2009

Re: [Electric Boats] Re: Boats over 30'



As I recall the manual states not to use the battery charge circuit at the same time you use the high voltage system. This has no effect while charging a battery as voltage feed to a battery can be any voltage higher than the minumum charge voltage.  Of course if the voltage is higher than lets say 15 for a 12v system your electronics will likely suffer. If you have need for I believe 156vdc you can tap into the 3phs output of the PM generator using a bridge inside your Honda and avoid the losses inherent with the AC output. Of course the 220 units will have a larger output that could be sent right to a 220 vfd to control a small 3phs motor.

Kevin
http://simplyrv.imnugget.com

For RV information

--- On Wed, 6/3/09, Matthew Geier <matthew@acfr.usyd.edu.au> wrote:

From: Matthew Geier <matthew@acfr.usyd.edu.au>
Subject: Re: [Electric Boats] Re: Boats over 30'
To: electricboats@yahoogroups.com
Date: Wednesday, June 3, 2009, 2:57 PM

merrick white wrote:

>

> I am not sure what you mean by saying the the 2000i will only slow charge one 12v battery at a time?

>

>

Assuming the feature set is the same across all regions (I'm in

Australia), there is a 12v unregulated output on the Honda 2000i that

can be used to charge a 12v battery.

Looking at the block/circuit diagram in my EU20i manual, the 12v comes

straight off an auxiliary coil, goes through a bridge rectifier and then

to the DC socket. There is no voltage sensor back to the ECU, they

obviously just 'know' if they run at a certain speed, the auxiliary coil

produces something near 12v.

While my diagram is the 230v unit, I don't expect the 120v version is

significantly different in operation - at half the voltage the current

has to be twice as much on the AC side, so the US version probably has

thicker wires and chunkier over current protection, but the basic

engineering and build of the unit would be the same. (Except for the

output voltage and the socket, the 2000i looks the same as my EU20i!)

Since there is no control or feedback on the '12v' output at all, it

looks like it would be really easy to 'cook' your 12v battery if you

were not careful, and certainly don't plug something like your 13.8v

powered radio transceiver into it!











[Non-text portions of this message have been removed]

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