Delta VFD-EL-W Series User Manual

Appendix C. How to Select the Right AC Motor Drive｜VFD-EL-W
208
Symbol explanation
MP
Motor shaft output for load (kW)
η
Motor efficiency (normally approx. 0.85)

cos
Motor power factor (normally approx. 0.75)
MV
Motor rated voltage (V)
MI
Motor rated current (A), for commercial power
k
Correction factor calculated from the current distortion factor
(1.05–1.1, depending on PWM method)
1CP
Continuous motor capacity (kVA)
Sk
Starting current/rated current of the motor
Tn
Number of motors in parallel
Sn
Number of simultaneously started motors
2
GD
Total inertia (GD
2
) calculated back to motor shaft (kg m
2
)
LT
Load torque
At
Motor acceleration time
N
Motor speed

Delta VFD-EL-W Series Specifications

General

Brand	Delta
Model	VFD-EL-W Series
Category	DC Drives
Language	English