Mitsubishi FR-A800

Position control under vector control and PM sensorless vector control
PARAMETERS
231
5
5.5.3 Set the procedure of PM sensorless vector
control (position control)
NOTE
• The carrier frequency is limited during PM sensorless vector control. (Refer to page 277.)
• Position deviation may occur due to motor temperature changes. In such case, shut off the inverter outputs, and restart.
• Perform position control under PM sensorless vector control only when using an MM-CF IPM motor with the low-speed high
torque characteristic. (Pr.788="9999 (initial value)")
• Position control is performed on the assumption of 4096 pulses/motor rotation.
The positioning accuracy is 200 pulses/rev for 1.5K or lower, and 100 pulses/rev for 2K or higher (under no load).
PM
PM
PM
Test run
Select the position command source. (Pr.419)
Select the control mode. (Pr.800) (Refer to page 164)
As required
• Set the electronic gear. (Refer to page 247.)
• Set the position adjustment parameters. (Refer to page 249.)
• Adjust the position control gain. (Refer to page 251.)
• Set the torque limit. (Refer to page 185.)
Set Pr.800= "13 (position control)" or "14 (speed - position switching)" to enable position
control.
Perform IPM parameter initialization. (Refer to page 172.)
Set the positioning parameters.
(Pr.465 to Pr.494 and Pr.1222 to Pr.1281)
(Refer to page 232.)
Select the command pulse type. (Pr.428)
(Refer to page 245.)
Position command by contact
input.
Position command by inverter
pulse input,
Set "3003 or 3103" in Pr.998 PM parameter initialization (IPM parameter initial
settings).
Setting value "3003": parameter settings for MM-CF IPM motor (rotations per minute)
Setting value "3103": parameter settings for MM-CF IPM motor (frequencies)