Technical Data; Definition Of Parameters; Parameters On The Data Sheet - Bosch Rexroth MKE Series Project Planning Manual

Project Planning Manual | Rexroth MKE Synchronous Motors
4

Technical Data

4.1

Definition of Parameters

4.1.1

Parameters on the Data Sheet

Description
Continuous torque at standstill 60K M
Continuous torque at standstill 60K I
Maximum torque
Maximum current
Torque constant at 20 °C
Constant voltage at 20 °C
Winding resistance at 20 °C
Winding inductivity
Discharge capacity
Number of pole pairs
Moment of inerta of rotor
1)
Thermal time constant
Maximum torque
Symbol Unit Description
Continuous torque that can be released to the motor output
Nm
0_60
shaft at a speed of n ≥ 0.1 Hz.
Phase current (crest value) of the motor M
A
0_60(rms)
continuous torque at standstill MdN at a speed of n ≥ 0.1 Hz.
Maximum torque I
M
Nm
max
(manufacturing tolerances +5 % / 20 %).
Maximum, briefly permissible phase current (crest value) of
I
A the motor winding without adverse affect on the permanent
max(rms)
magnet circuit of the motor.
Ratio of the generated torque to the motor phase current (crest
K value) at a motor temperature of 20 °C. Unit: (Nm/A). Appli‐
Nm/A
M_N
cable up to approx. i = 2x I
Root-mean-square value of the induced motor voltage at a
K
V/min -1
EMK_1000
motor temperature of 20°C and 1000 revolutions per minute.
R
Ohm Resistance measured between two winding ends in ohms (Ω).
12
L
mH Inductivity measured between two phases in (mH).
12
C
ab
o
Moment of inertia of the rotor without the optional holding
J
kgm
2
rot
brake. Unit = kgm².
Time of the temperature rise to 63% of the maximum temper‐
ature of the motor housing with the motor loaded with the
permissible S1 continuous torque. The thermal time constant
is defined by the type of cooling used.
T
min
th
①
Θmax
Tth
Fig.4-1:
Maximum permissible speed of the motor. Limiting factors can
n
min have mechanical (centrifugal forces, bearing stress) or elec‐
-1
max
trical (DC link voltage) causes.
Electric Drives | Bosch Rexroth AG
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that can be released for about 400 ms
max
.
dN
chronological course of the motor housing
temperature
highest temperature (motor housing)
Thermal time constant
Thermal time constant
23/131
Technical Data
required for the
dN