At 8:24 PM -0700 10/1/02, Rod Hower wrote: > A sepex system designed >for an application is cost competitive and superior to a >series system. How do you make this work for an EV market? >It's very difficult. You have to depend on the operator >to program in the appropriate parameters for their application. >This is assuming the motor is the same. If you have several >different sepex motors it gets even more complicated. >So the bottom line is series is a Wal Mart solution.
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- http://www.CafeElectric.com/ Zilla "Got Amps" Shirts now available online. http://www.evcl.com/914 My electric 914
