I'm inclined to agree it might make more sense to go for an AC drive system rather than a sepex dc system.
The AC drive setups used by Victor Tikhonov and Sheer Pullen look promising for conversions. Maybe I should pay more attention to what they are doing. Are there others following their lead ? Tom Shay ----- Original Message ----- From: "Otmar" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Tuesday, October 01, 2002 6:28 PM Subject: Re: SepEx Motors and Controllers for EVs > I have developed a few sep-ex drive systems for low voltage > industrial use. My programmer and I made one on Zilla platform > running a sep-ex ADC 9" motor for his Honda Del Sol conversion. It > works pretty well, but there are drawbacks. > > As discussed before, the motor design could use interpoles, which we > don't have on ours. In order to do low speed regen in the controller, > the high current section that drives the armature needs twice the > silicon of a series drive. Then there is the increased complexity of > the small H bridge field controller. > > Overall I decided that in the volumes we are doing, for the hobbyist > market, a AC drive makes more sense. The incremental cost in silicon > for AC drive is not that big anymore, and the benefits are numerous. > > -Otmar- >
