http://www.robot-power.com/catalog/ They're not real cheap, but they give you the option of building your own control in H-bridge style for series brush motors. They also concentrate on 24V systems, although the FET's are probably 55-60V, you'll just need to make sure the bus caps can handle a higher voltage (like a 36V system).
Ashley Roll wrote: > Hi Everyone, > > I've been asked by a client of mine to design an electronic motor controller > for some low-ish current (30A peak) 36 or 48 volt motors and I got to > thinking that I could probably design it so I can "add more silicon" and get > it to the stage were it could drive golf carts, it would be a more useful > product. > > The problem is that I can't seem to find any specifications on what golf > cart motors consume.. I see that they run on between 36 and 48 volts, but > I've not seen any current specs. > > Can anyone point me at some reliable information on this? > > I'm looking at a Microprocessor controlled full H-Bridge system with a > serial interface for programming various parameters like accel and decel > rates, speed limits, and even be controllable from the serial port. It would > "normally" be operated by a pot-box. It will support regen and be able to > limit it so that it doesn't "over charge" the battery pack.. > > Running some numbers on various MOSFETs I would expect I can get a 100A > continuos rating without too much trouble (and a good heatsink). Would that > be enough? I'm figuring I can get away with just one 80A MOSFET per leg for > the 30A version, and go up to 3 or 4 per leg for the high current one > (different MOSFETs, but that isn't a bit problem). > > I haven't done a high current H-bridge before, but I've been doing a lot of > reading, would anyone familiar with them be interested in critiquing my > "rough design"? Is there an email list for this kind of thing? > > Thanks for your help guys.. > Cheers, > Ash. > > --- > Ashley Roll > Digital Nemesis Pty Ltd > www.digitalnemesis.com > Mobile: +61 (0)417 705 718 > > >
