Bosch rexroth MBT, Руководство пользователя

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M Maximum torque of application in N
M
max
Maximum torque of the motor in N
P
V
Power loss of motor application in W
P
Vmax
Maximum power loss of the motor in W
Fig. 10-21: Diagram used for determining the reduced electrical power loss
10.4.4 Cooling capacity
The necessary cooling capacity corresponds the electric continuous power
loss of the motor. In case of increasing speed, the additional losses such as
iron losses (hysteresis and eddy current losses) in sheet-metal and sole‐
noids.
P
co
Required cooling capacity in W
P
ce
Electrical dissipation (copper loss) of motor in W
M
eff
Effective force in N
M
N
Rated torque of motor in N (see chap. 4 Technical data)
P
V
Power loss of motor in kW (see chap. 4 Technical data)
P
Cu
Copper loss
R
12
Winding resistance at 20 °C (see chap. 4 Technical data)
Δϑ Temperature difference between inlet and outlet at the cooling
connections of the motor
α
Cu
Temperature coefficient 0.0039 1/K
Fig. 10-22: Required cooling capacity of the motor
The required flow rate to dissipate the cooling capacity of chapter 10.4.4
"Cooling capacity " on page 299 for the cooling medium water is calculated
from:
MBT High Synchronous Torque Motors 299/409
Motor dimensioning
R911298798_Edition 08 Bosch Rexroth AG