Chapter 3. Specifications
HR4 Motor User manual
3-5
The following graph and table are designed to help the user
determine the correct performance envelope of operation so as to
not overheat and damage the motor.
Force Vs. Velocity at various w ork regim es
0
10
20
30
0
100
200
300
Velocity [m m /sec]
Fo
r
c
e
[
N]
a
d
c
b
f
g
e
Curve
Duty Cycle
max.continuou
operation ti Duty Cycle
max.continuou
operation ti Duty Cycle
max.continuou
operation ti
a
100%
-
100%
-
100%
-
b
100%
-
100%
-
44%
184
c
100%
-
92%
137
26%
107
d
100%
-
62%
93
17%
72
e
78%
87 seconds
47%
70
13%
55
f
56%
62 seconds
33%
50
9%
39
g
50%
56 seconds
30%
45
8%
35
Vacuum
C
0
25
C
0
50
Figure 3-4: Performance envelope at various work regimes
How to define a performance envelope
An example for using the graph and table:
A
vacuum
application requires
10N
at a velocity of
100mm/sec
. The graph shows that this point
of operation corresponds to the curve “
d
”.
The table shows that curve “d” and a vacuum environment require that a duty cycle of 17% will
not be exeeded while maintaining a maximum continuous operation time of 72 seconds.
Vacuum application note
– Heat dissipation mechanism is by radiation to the motor case and
by conduction through the fingers. Hence, the motor and the ceramic drive strip bases, must
both be thermaly designed to dissipate 2W each (per motor), with a temperature rise of 15
°
C
maximum. Also, the temperature of all parts in contact with the motor and with the ceramic drive
strip, should not exeed 40
°
C.
