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Application notes
Coolant temperature rise
Pressure drop
Flow rate
Coolant flow for compliance with
the specified motor torque
Bosch Rexroth AG R911298798_Edition 08
Q
Q
Flow quantity
T
Coolant inlet temperature
1
T
Coolant outlet temperature
2
p
Inlet pressure
1
p
Outlet pressure
2
Fig. 9-2:
Liquid-cooled component
ΔT
Coolant temperature rise in K
T
Coolant outlet temperature in K
2
T
Coolant inlet temperature in K
1
Fig. 9-3:
Coolant temperature rise in K
Δp
Pressure drop
p
Inlet pressure
1
p
Outlet pressure
2
Fig. 9-4:
Pressure drop via flown through component
The required coolant flow for compliance with the specified motor torque is
specified in chapter "Technical data".
For this value, a temperature increase of 10 K in the coolant is applied.
The required coolant flow at deviating temperature increase and/or non-water
coolants is determined according to
ing power loss." on page 268
coolants at 20°C" on page
Q
Rated coolant flow in l/min
P
Amount of power to be dissipated in W
V
c
Specific heat capacity of the coolant in J / kg ⋅ K
ρ
Density of the coolant in kg/m³
ΔT
Coolant temperature rise in K
Fig. 9-5:
Coolant flow required for removing power loss.
MBT High Synchronous Torque Motors
P v
, p
, p
T
T
2
1
2
1
fig. 9-5 "Coolant flow required for remov‐
and
tab. 9-6 "Substance values of different
269:
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