On Sun, 28 Oct 2007 20:13:28 -0500, Ignoramus32225
wrote:


I looked into the manual, available at

http://igor.chudov.com/manuals/

and found reference to parameter 1300, V/F curve. It talks about
different selections, such as linear V/F, parabolic etc. It says that
linear V/F is better for constant torque and "positive displacement
pumps".


Make sure parameters 0304 (Rated motor voltage), 0310 (Rated motor
frequency), and 0311 (Rated motor speed) match the motor nameplate. If
they don't, the slope of the V/f curve will be wrong, i.e., the motor
will see an undervoltage or overvoltage condition which will get worse
as the speed increases.

--
Ned Simmons