Delta CT2000 Series User Manual page 379

Chapter 12 Description of Parameter SettingsCT2000 Series
Zero voltage time while start up

Settings
When the motor is in static status at the startup, the accuracy to estimate angles will be

increased. In order to make the motor in "static status", the drive 3 phase U, V, W output 0V
to motor to reach this goal. The Pr10-49 setting time is the length of time when three-phase
output 0V.
 It is possible that even when this parameter is being applied but the motor at the installation
site cannot go in to the "static status" caused by the inertia or by any external force. So, if the
motor doesn't go into a completer "static status" in 0.2 sec, increase appropriately this setting
value.
This parameter is functional only when the setting of Pr07-12 ≠0.

If Pr10-49 sets too high, the start-up time will be longer obviously. If is too low, then the

braking performance will be weak.
Reverse Angle Limit (Electrical angle)

Settings
 While forward run is starting, if there is a sudden reverse run and the reverse angle is larger
than the Pr10-50 setting, then drive will has a ScRv error.
 This parameter is valid only when Pr07-28 =11 Enable textile machine's function.
 If the estimated angle error of start-up is too large to cause the motor reverse, the parameter
can limit the degree of the reverse.
 Decrease the setting value to let the reverse angle not to be large; or increase it for high error
tolerance, but it might cause oc easily if there is large load.
Injection Frequency

Settings
 This parameter is a High Frequency Injection Command when the motor drive is under IPM
HFI sensor-less control mode and it doesn't often need to be adjusted. But, if a motor's rated
frequency (i.e. 400Hz) is too close to the frequency setting of this parameter (i.e. 500Hz),
the accuracy of angles detected will be affected. Therefore, refer to the setting of Pr01-01
before adjusting this parameter.
 If the setting value of Pr00-17 is lower Pr10-51*10, then increase the frequency of carrier
wave.
5. ASR parameters
System Control
Settings
 bit 0=0: Pr.11-06 to 11-11 will be valid and Pr.11-03~11-05 are invalid.
bit 0=1: system will generate an ASR setting. At this moment, Pr.11-06~11-11 will be invalid
and Pr.11-03~11-05 are valid.
0.000~60.000 sec.
0.00~30.00 degree
0~1200Hz
bit 0: Auto tuning for ASR and APR
bit 1: Inertia estimation (only in FOCPG mode)
12.2-00-17
Factory Setting: 0.000
Factory Setting: 10.00
Factory Setting: 500Hz
Factory Setting: 0