SEW-Eurodrive PSH CM2H Series, Operating Instructions Manual

Page: 39 / 68

8
Technical data
Boundary conditions
Operating Instructions – Stainless Steel Servo Gearmotors
39
8 Technical data
8.1 Boundary conditions
The technical data of the CM2H.. stainless steel motors apply under the following
boundary conditions:
• Maximum ambient temperature 40 °C
• System voltage 400 V
• Pulse width modulation frequency (PWM frequency) at least 8 kHz
• Maximum winding temperature 155 °C
8.2 Technical data
8.2.1 Abbreviations and descriptions
Designation Letter sym-
bol
Unit Description
Degree of protection – – Degree of protection in accordance with EN 60520
Torsional rigidity C
tg
Nm/arcmin Torsional rigidity of the gear unit in Nm per angular minute
Gear unit ratio i 1 Ratio of the gear unit
Standstill current I
0
A Current consumed to achieve standstill torque
Maximum motor current I
max
A Maximum current of the motor
Mass moment of inertia J
mot
kg m
2
Mass moment of inertia of the motor
Mass inertia of the
brakemotor
J
bmot
kg m
2
Mass inertia of the brakemotor
Service life L h
Gear unit service life at maximum permitted cyclic duration factor and maximum
permitted cycle time, nominal output torque M
a_N
, nominal input speed n
e_N
and
nominal overhung load F
R_a_N
.
Speed class n
C
min
-1
Maximum speed of the brakemotor
Nominal speed n
e_N
min
-1
Nominal speed at the gear unit input shaft, during continuous duty, at nominal
torque M
a_N
, nominal ambient temperature T
amb_N
, maximum permitted housing
temperature T
max
and gear unit service life L.
Maximum speed n
e_pk
min
-1
Maximum permitted rotational speed at the input shaft of the gear unit during
short-time duty.
Standstill torque M
0
Nm Thermal continuous torque at low speeds
Output torque M
a
Nm Output torque of gearmotor
Nominal torque M
a_N
Nm Rated gear unit torque
Dynamic output torque M
a_dyn
Nm Dynamic output torque of the drive
Nominal braking torque
motor
M
BR
Nm Nominal braking torque of motor
Dynamic limit torque M
pk
Nm Dynamic limit torque of the motor
Ambient temperature T
amb
°C Ambient temperature
Gear unit temperature T
max
°C Gear unit temperature
System voltage U
0
V Nominal operating voltage of motor
Rotational clearance φ arcmin
The rotational clearance describes synchronism difference of both directions of
rotation.
Efficiency η % Efficiency of the gear unit
INFORMATION
In fields marked with ">...",M
a_Dyn
must not exceed the maximum permitted torque
M
a_pk
in short-time duty because the motor may overload the gear unit. The motor cur-
rent I
max
must be limited at startup.
26880490/EN – 05/2022