We use a Kelly 48301 to regen brake a 10kw motor on our dyno.
The regen is about 85% efficient, far better than a traditional alternator. The Kelly also regulates the voltage.
Be Well,
Arby
Advanced Marine electric Propulsion
I've been looking at the ME0913 as teamed up with a Kelly controller that does regen. As compared to the motors power output what efficiency would one expect to get from a regen such as this? If the controller/motor team provides a 90% efficiency would one reasonable expect the generation efficiency to be the same?
From: Jeremy <jeremy_harris_uk@yahoo.com>
To: electricboats@yahoogroups.com
Sent: Wednesday, September 14, 2011 1:53 AM
Subject: [Electric Boats] Re: ME0913 as a generator?You can certainly use this BLDC/PMAC motor as a generator, but it will generate 3 phase AC, rather than DC.
This is the same as a car alternator though (they are also three phase AC generators) so can be rectified to DC.
The big problem with using any PM motor as a generator is that there is no easy means of controlling the output. A non-PM alternator is controlled by varying the small current that flows in the rotor, which varies the magnetic field strength and hence the output power. The field is fixed with a PM alternator, so you need an external regulator. This would work rather like the motor speed controller in reverse (taking uncontrolled power from the generator and providing a regulated output). An alternative is to use feedback from the generator output to control the motor that's driving it, via some sort of servo system. Some cheap gensets do this, they control the throttle on the motor to regulate the output.
Jeremy
--- In electricboats@yahoogroups.com, Michael Mccomb <mccomb.michael@...> wrote:
>
> Would anyone have thoughts on the appropriateness of driving an ME0913 motor to use it as a DC generator? Spin it up so as to get 96v out of it?
>
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