REXROTH IndraDrive - Power Factor Cosφ1 or DPF for Calculating the Wattless Power Load of the Mains; Power Factor Cosφ or TPF (Λ); Mains Voltage Unbalance

ki Distortion factor or harmonic content
I
k
Harmonic current of the k-th harmonic
I
1
rms value of the 1st harmonic (fundamental wave)
I
2
rms value of the 2nd harmonic
Fig.15-34: Distortion Factor k or Harmonic Content
Power Factor cosφ1 or DPF for Calculating the Wattless Power Load of the Mains
The power factor cosφ1 or DPF (distortion power factor) is used to calculate
the wattless power load of the mains:
P
netz
Effective mains power
S
1LN
Apparent mains power of fundamental wave
Fig.15-35: Power Factor cosφ1 / DPF
Power Factor cosφ or TPF (λ)
The power factor cosφ or TPF is used for dimensioning mains components
(transformer, fuse, etc.):
P
netz
Effective mains power
S
LN
Apparent mains power
Fig.15-36: Power Factor cosφ / TPF/ λ
Only for sinusoidal values does the power factor cosφ equal the
total power factor TPF (λ).
15.2.4 Mains Voltage Unbalance
The voltage unbalance is described by a three-phase system consisting of
the combination of the following systems:
● Clockwise AC system (positive-sequence system U
m
)
● Counter-clockwise AC system (negative-sequence system U
g
)
● DC system (U
0
)
Bosch Rexroth AG DOK-INDRV*-SYSTEM*****-PR06-EN-P
Rexroth IndraDrive Drive Systems with HMV01/02 HMS01/02, HMD01, HCS02/03
262/309
Calculations