Bosch rexroth MCL, Project Planning Manual

Page: 33 / 206

4.1.3 Description of specified sizes
The PWM-Frequency of the drive controller affects the resulting
motor data. All data in this documentation refer to a PWM-Fre‐
quency of 4 kHz.
Characteristics for primary parts MCL
Designation Symbol Unit
Toler‐
ance
Description
Maximum force
F
max
N ± 5 %
Maximum force at maximum current I
max
. The force that can be reached
depends on the drive control device used.
Continuous nominal force F
N
N ± 5 %
Available continuous nominal force of the motor up to v
N
at nominal cur‐
rent I
N
.
Maximum current
I
max
A
Maximum current of the motor at F
max
.
Rated current I
N
A Rated current of the motor at continuous nominal force F
N
.
Reference voltage DC bus
voltage
U
DC
V
Reference voltage of intermediate circuit for determination of the winding
velocity.
Maximum velocity at F
max
v
Fmax
m/min
Maximum velocity at maximum force F
max
. The velocity reached depends
on the DC bus voltage of the used drive control device.
Nominal velocity
v
N
m/min
Velocity, up to continuous nominal force F
N
of the motor is available.
Force constant K
FN
N/A ± 5 %
Relation of force increase to increase of force-creating current. Due to the
principle of an ironless primary part, no saturation effects occur. There‐
with, the constant is not current-dependent.
Voltage constant at 20 °C K
EMK
Vs/m ± 5 %
Induced motor voltage depending from the travel velocity relating on ve‐
locity 1 m/s at 20°C.
Winding resistance at 20 °C
R
12
Ω Measured winding resistance among two strands at 20 °C.
Winding inductivity L
12
mH
Measured winding inductivity between two strands. The defined measur‐
ing values are fluctuating due to boundary effects. These details are typi‐
cal values, which are determined with a measuring current of 1 mA at a
measuring frequency of 1 kHz.
Winding inductivity L
23/31
mH
Measured winding inductivity among two strands (strand 2/3 or 3/1). Due
to fringe effects, the specified measured values are different to L
12
. These
details are typical values, which are determined with a measuring current
of 1 mA at a measuring frequency of 1 kHz.
Rated power loss P
VN
W
Power loss in operation mode S1 (continuous operation) at nominal veloc‐
ity v
N
.
Pole width
τ
P
mm
Distance dimension of pole center to pole center of the magnets on the
secondary part.
Thermal time constant T
th
Duration of temperature rise to 63% of the final temperature of the wind‐
ing at natural convection and load with continuous nominal force in S1-op‐
eration.
① Chronological course of the winding temperature
θ
max
Max. winding temperature
T
th
Thermal time constant
Fig. 4-3: Thermal time constant
Mass primary part m
P
kg Mass of primary part
MCL Ironless Linear Motors 25/197
Technical data
R911330592_Edition 06 Bosch Rexroth AG