Posted: Tue Jul 24, 2007 4:17 pm
I don't think Alltrax controllers are more efficient than the equivilent Curtis, I KNOW they are more efficient.
They have lower conduction losses because they use Mosfets with a lower Rds-on rating. They also use a much faster turn-on/off time and so have lower switching losses. Many people are using the Alltrax without any additional heatsinking, I wouldn't risk it with a Curtis. The Alltrax is not usually fitted as an OEM controller, but it is often fitted as an upgrade for higher performance or to replace a failed Curtis.
I used to race electric vehicles with the people who designed the Alltrax and they originally got into controller design becuase the Curtis often wasn't up to the job (To be fair, one which it wasn't designed for).
Amatuer builds and prototypes are exempt from CE and EMC and non compliant components can in any case be used as part of an overall compliant installation.
They have lower conduction losses because they use Mosfets with a lower Rds-on rating. They also use a much faster turn-on/off time and so have lower switching losses. Many people are using the Alltrax without any additional heatsinking, I wouldn't risk it with a Curtis. The Alltrax is not usually fitted as an OEM controller, but it is often fitted as an upgrade for higher performance or to replace a failed Curtis.
I used to race electric vehicles with the people who designed the Alltrax and they originally got into controller design becuase the Curtis often wasn't up to the job (To be fair, one which it wasn't designed for).
Amatuer builds and prototypes are exempt from CE and EMC and non compliant components can in any case be used as part of an overall compliant installation.