Delta VFD11AMS23ANSAA - Page 438

Chapter 12 Descriptions of Parameter SettingsMS300
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electromagnetic noise might be louder if the setting value is too high.
 The system uses this parameter when the motor’s parameter is “Auto”. This parameter
influences the angle estimation accuracy.
 When the ratio of the salient pole (Lq / Ld) is lower, increase Pr.10-52 to make the angle
detection accurate.
 Pr.10-52 is valid only when Pr.10-53 = 2.

10-53
Angle Detection Method
Default: 0
Settings
0: Disabled
1: Force attracting the rotor to zero degrees
2: High frequency injection
3: Pulse injection
 Set to 2 for IPM; set to 3 for SPM. If these settings cause problems, then set the parameter to 1.