Well, that took me down a half hour rabbit hole raiding their google drive = for documents and videos ... Thanks Russell :) -----Original Message----- From: piclist-bounces@mit.edu On Behalf Of Russel= lMc Sent: 19 September 2018 15:41 To: Microcontroller discussion list - Public. Subject: [EE]:: free 'book': Smart Drive BLDC Motor Applications for DIY pr= ojects Extremely useful 34 page manual on using Fisher & Paykel "smart drive" BLDC motors as BLDC motors - not quite so trivial as it might seem :-). The NZ originated F&P direct drive motors are available in surplus washing machines and other domestic equipment in a number of countries worldwide - USA included. I recently encountered one in an LG washing machine so they may be even more widespread in other than F&P machines. These motors are widely used as wind turbine and water-power alternators and somewhat less widely used as motors for ebikes, and other applications that will benefit from high torque low RPM direct drive motors. Applications could include lathes, potting wheels (example given in manual), gate openers, ... numerous position and variable speed control applications. This manual explains the various versions liable to be encountered in surplus equipment and how they can be driven using off the shelf brushless motor controllers. A far better treatment than usually encountered. Their results seem to be "somewhat empirically biased" (a la Edison) but still useful. https://drive.google.com/file/d/0BzVDBix3S_qbNU1YWmZwTUFsQ2s/vie= w Not mentioned in the manual (I think) is the fact that the motors can be rewired from having coils highly serial connected to series-parallel or all parallel arrangements (per phase) allowing lower voltage higher current applications. As supplied the motors use ferrite magnets (a cost / performance tradeoff decision) and produce outputs typical;ly in the 300 - 1200 Watt range. . Conversions to neodymium magnets produce powers in the 2 to 3 kW range and attendant cooling challenges. The table on page 10 allows power outputs to be assessed. Power ~=3D nm/10 x RPM. So 29 nM at 460 RPM =3D~ 1300 Watts The 1200 RPM, 24 nm claim is suspect but may be true =3D 2880 Watts !!! Section 4.5 on page 12 suggests rather less power (as expected). --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .