That looks like a decent reversible motor controller, which should be
relatively easy to build. I've used similar uni-directional kits from
QKits for speed control of elevate and rotate motors. The MOSFETs
specified in the Oatley kit are certainly sufficient for a 250W motor
and the design is simple enough that you'll be able to repair them if
something fries one day. The added bonus is that they accept servo
signals as input, which makes them useful in more applications.
That said, you'll only be able to truly determine if it works well by
purchasing one and testing it. If the circuit is designed well, the
FETs will not generate too much heat even after repeated stopping and
starting and the motor "whining" at low speeds will be minimal.
When using two such single-motor controllers for tank-style steering,
you also need to remember that the radio gear or the C6C will have to do
"channel mixing". The C6C provides tank mixing of joystick channels for
that very reason. Some R/C systems provide mixing, others do not. For
R/C systems without mixing, you can also buy a mixing circuit to work
between the R/C receiver and speed controllers.
I've used a couple of Oatley products over the years and they all appear
to be good deals. My only problem has been that orders take a long time
to be shipped to the U.S., but maybe that has improved in the last
couple years.
Frank P.
On 3/5/2011 12:08 PM, Pete wrote:
I was looking thru my favourite electronic surplus store here in OZ and
came across this little beauty.
http://secure.oatleyelectronics.com//product_info.php?cPath=81&products_id=206&osCsid=9d8ee84c2e2d01343bacd89272ce62a2
<http://secure.oatleyelectronics.com/product_info.php?cPath=81&products_id=206&osCsid=9d8ee84c2e2d01343bacd89272ce62a2>
any thoughts from the technical minded to the suitability of this
product for use with 250W 24vdc motors (can also be found on this site
as SG250) and either RC or the C6C??
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