9.Appendix
Supplementary items for usage
9-15
2) Setting procedures for parameters of magnetic pole position estimation
Magnetic pole position estimation is necessary every time at start-up of driver model EGA.
For the following cases, set the parameters of "Gr.B_ID01: Excitation Command Frequency
setting (EMPFREQ)" and "Gr.B_ID02: Acceleration threshold (ACC)", which are relating to
the estimation of magnetic pole position, suitable for each device.
Check items when estimation of magnetic pole position does not complete correctly
•
Unbalanced load or external force is applied to the motor.
•
Rigidity of device (mounting base, load, installation) is low.
•
Load inertia moment exceeds the specification of allowable load inertia moment.
•
"Gr.B_ID01: Excitation Command Frequency setting (EMPFREQ)" is close to the
resonance point of the device.
•
Combination of motor and converter is not appropriate.
Procedures for setting the parameters when alarm of Estimation of magnetic pole position
error occurs
(1) Change "Gr.B_ID01: Excitation Command Frequency setting (EMPFREQ)", and
implement estimation of magnetic pole position.
(2) Change "Gr.B_ID02: Acceleration threshold (ACC)", and implement estimation of
magnetic pole position.
Summary of Contents for M-EGA-15A2301
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