Designation Symbol Unit Definition
Thermal time constant
T
th
Duration of the temperature rise to 63% of the final temperature of the motor
housing at motor load with permissible S1 continuous torque. The thermal
time constant is determined by the cooling type used.
① : Chronological course of the motor housing temperature
Θ
max
: Highest temperature (motor housing)
T
th
: Thermal time constant
Maximum speed
n
max
min
-1
Maximum permissible speed of the motor. Centrifugal forces or bearing
stress can result in mechanical and DC bus voltage can result in electrical
limiting factors.
Mass
3)
m kg Motor mass
Ambient temperature during opera‐
tion
T
amb
Admissible ambient temperature during operation
Installation altitude Maximale installation altitude
Insulation class according to DIN
EN 60034-1
--- - Insulation class
Protection class acc. to IEC60529 --- - IP type of protection
Sound pressure level
L
P
Value of sound emission
1) 2) Manufacturing tolerance ±5%
3) (...) Values for motors with holding brake
Tab. 5-1: Definition of parameters
Bosch Rexroth AG DOK-MOTOR*-MSM********-DA05-EN-P20/61
Synchronous Servomotors MSM
Technical data
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