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A new acquisition – parts for the controller
29.04.2009
I had lots of problems and I had to wait a long time, but finally the parts for the controller that I had ordered from China arrived!
I can now start my work on the controller. The source of the PMW signal will be PICAXE ; at least for now that’s my decision.The whole idea is to make two controllers. The first one will be 700 A and it will be mostly used for testing. It’ll be tested in a project for a civil electric vehicle. If the tests turn out successful, we’ll make the big controller (1400 A) for my project. Let’s just hope that soon I’ll be able to show you something that actually works. Recently I found out that I had problems with the gear box. Somehow I overlooked the fact that my motor was too big and my drive flanges would lean on the motor. For 4 mm less and it would have worked. I heard that the 084 gear box had a bigger shell than the 020 box. Any ideas?
What’s new?
12.02.2009
There was some kind of standstill during the winter season.
To begin with, I’ve ordered 2 very interesting books from Amazon.com
I’ve posted some up-to-date pictures to stimulate you!
This is a Curtis 1221-7405 400 А controller on 120V… or at least it was All the Mosfet (BUZ 30A) transistors have burnt. I found it in Stamboliiski town in some junkyard. It’s quite impossible to fix it, but also it’s too small for my purposes. Apparently here we have an overloading process that lead to the current state of the transistors. If even one transistor should burn out, all others will follow the example. It’s interesting to know who it’s made. They used lots of electrical condensers in order to increase the area through which the electricity will flow, and that’s a foxy trick. There’s no problem with putting only one capacitor, but its pinouts won’t let enough electricity pass. The pinouts of the capacitor are put directly on the power armature and this blocks all the inductance. You can see a scheme of the controller here:
http://www.evdl.org/docs/curtis_1221b_schematic.pdf
ELPROM-EMS have released a new series of motors and I think I’ll get myself one of these very soon
Expect more news soon
