Adleepower AP2G3-137 Instruction Manual page 90

Description
Symbol description
Pm : Motor shaft output required for the load[kw]
η
: Motor efficiency (normally, approx. 0.85)
COS : Motor power factor (normally, approx. 0.75)
Vm : Motor voltage[V]
lm : Motor current[A] (current with commercial power supply)
Correction factor calculated from current from factor (1.05 to
k :
1.1, depending on the PWM method.)
Pc1 : Continuous capacity[KVA]
kS : Motor starting current/motor rated current
nT : Number of motors in parallel
nS : Number of simultaneously started motors
2 2
GD : Total (GD ) converted into motor shaft (kg-m
tL : Load torque(kg-m)
tA : Motor acceleration time
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Calculated of 150% for 1 minute
Motor acceleration of 1 minute or more
K Pm
η
Pc1
≦
Inverter capacity [KVA]
nT lm 1 + ( nS / nT )( kS - 1)
≦ Inverter capacity [A]
88
nT + nS ( kS - 1 )
ψ
COS
1 + ( nS / nT )( ks - 1 )
2
)