Maybe Azure Dynamics has de-rated the motor, since this sheet from Solectria claims 78KW http://www.scribd.com/doc/3917192/ac55
What vehicle are you going to use it in? If it's light enough you may be able to eliminate the transmission, but you'd probably want to talk to someone from electroauto about that.

 

it'd be for a Mercedes A-class.
probably an AC24 would be enough but our studies say a motor with at least 40kw continuois and 70-75kw peak would be perfect.

How can AzureDynamics have de-rated the motor??
How is it technicaly possible?
and why?

 

it'd be for a Mercedes A-class.
probably an AC24 would be enough but our studies say a motor with at least 40kw continuois and 70-75kw peak would be perfect.

How can AzureDynamics have de-rated the motor??
How is it technicaly possible?
and why?

Just in case you overlooked it, the AC55 is nearly 3 times the weight of the AC24 and double the voltage if you were hoping to design a 144V system.

I don't know why AzureDynamics would derate the motor, but it needs to be used with the DMOC controller, so maybe the controller is what is limiting the output?

 

Nothing physically changed about the motor, they may have just changed it's claimed output because the unit was being used in vehicles that were too large. This is just speculation on my part, but we have seen similar things happening with other products, such as Kelly controllers lowering the ratings on some of their controllers because people were operating them near the top of their capacity and having problems.

 

Afterall, which is the realistic rating in your opinion?
Solectria 78kw peak or conservative 59kw declaration by AzureDynamics?

 

I really don't know. I suppose you might email electroauto and Azure and see what they have to say.

 

Last time I spoke to Beth at Azure (last month), she mentioned that they were redesigning the AC55. That could explain the differences in specs.

 

Great, they're redesigning it to produce less power Seems unlikely.

 

It's significantly heavier than other motors with similar specs. If they manage to come up with something lighter then it will be worth looking into.

 

Anyone find anything on this?

 

It's also significantly cheaper than any other AC motor/controller of that power. If they chop 50 or so pounds off it but it's capacity goes from 78kw to 59kw I don't consider that an improvement, especially if the price goes up.

 

The strange thing is that the original designer, Solectria, agreed with EA.