Bosch Rexroth HMU05.1N Series, Руководство по планированию проекта

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P
DC
Required DC bus continuous power [W]
M
eff
Effective torque in Nm
n
m
Average speed in min -1
k Factor for motor and controller efficiency = 1.25
3. Add powers of all axes at common DC bus and put them into relation to
rated power of supply unit
⇒ Partial load of P
DC_cont
is available
4. Determine power factor TPF for partial load (TPF = Total Power Factor)
For the value TPF at rated power and TPF
10
(at 10% of rated power),
see technical data (mains voltage) of the component.
5. Calculate mains connected load
S
LN
Mains connected load [VA]
P
DC
DC bus continuous power [W]
TPF Total Power Factor λ
6. Calculate mains-side phase current
3-phase:
I
LN
Mains-side phase current in [A]
S
LN
Mains connected load [VA]
U
LN
Voltage between phases of mains [V]
7. Select mains contactor
8. Determine mains circuit breaker and line cross section
See
chapter 11.2 "Dimensioning the line cross sections and fuses " on
page 371
Dimensioning the line cross sections and fuses
See chapter 11.2 "Dimensioning the line cross sections and fuses " on page
371 .
Dimensioning and selecting the mains transformer
Mains transformers are always needed when the mains voltage is outside of
the allowed nominal voltage of the component.
Grounded mains The mains voltage for grounded mains is generally adjusted with autotrans‐
formers.
Ungrounded mains
The mains voltage for ungrounded mains is generally adjusted with isolating
transformers to prevent overvoltages between outer conductor and ground.
Short-circuit voltage of the isolating transformer: ≤ 6%
DOK-INDRV*-HXX05******-PR02-EN-P Bosch Rexroth AG 111/407
Rexroth IndraDrive ML Drive Systems with HMU05
Combining the individual components