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Appendix – Inertia Calculation
Inertia Calculation
Appendix
The Quattro DC software can be used to
calculate the inertia of the entire elevator,
which is used for accurate tuning of the speed
regulator.
The following is a step-by-step procedure for
using the Quattro DC to estimate the elevator
system inertia.
Using the Software to Estimate the
System’s Inertia
With a balanced car, run the car at 100%
contract speed from top floor to the bottom
floor then back to the top floor.
Observe the EST INERTIA under DISPLAY
MENU - ELEVATOR DATA D1 for both the
down and up direction.
RUN/FAULT
SUB MENU
DATA ENT
EST INERTIA
D1 1.95 seconds
• Average the two values and enter the
DRIVE A1 parameter.
RUN/FAULT
SUB MENU
DATA ENT
INERTIA
A
1 01.95 sec
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