REXROTH MKD025A-144, Manual

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13-2
Application Instructions Synchronous Motors MKD
19.05.2004 Version7.0 DOK-MOTOR*-MKD*******-PR07-EN-P
Vibration and Shock Loads
MKD motors can carry loads, such as are typically occurring in case of
presses, punches, or press inlets, only if they are attached in a shock-
absorbed or shock-decoupled way. The construction of such
attachments must be checked in isolated cases.
According to IEC 721-3-3 ed. 1987 and EN 60721-3-3 ed. 06/1994, MKD
motors, if used stationary and weather-resistant, may be operated under
the following conditions:
•
Longitudinal motor axis: according to class 3M1
•
Transverse motor axis: according to class 3M4
⇒
Ensure that the limits specified in Fig. 13-2 and Fig. 13-3 for storage,
transport, and operation of the MKD motors are not exceeded.
Influencing quantity Unit Maximum value
in longitudinal
axis Maximum value
in transverse
axis
Amplitude of the excursion at 2
to 9 Hz mm 0,3 3,0
Amplitude of the acceleration at
9 to 200 Hz m/s² 1 10
Fig. 13-2: Limits for sinusoidal vibrations
Influencing quantity Unit Maximum value
in longitudinal
axis Maximum value
in transverse
axis
Total shock-response spectrum
(according to IEC721-1, :1990;
Table 1, Section 6) Type L type I
Peak acceleration m/s² 40 100
Fig. 13-3: Limits for shock load
Note: MHD motors have higher maximum values.
Note: Motors with attached blowers are not suitable for
applications subjected to shock loads, such as are occurring
in case of
•
punches,
•
presses, or
•
loading portals.
In such cases, motors without surface-cooling and a higher
torque must be used.