Configuration Manual AC Induction Motors 1PH4 - Siemens ...

3.4.5 Gearbox stage selection
© Siemens AG 2003 – 2006 All rights reserved
AC Induction Motors, 1PH4 (APH4) – 04.06 Edition
Motor Components
3.4 Gearboxes
When changing the gearbox stage, the following information must be carefully observed:
� Only change over the gearbox stage at standstill; e.g. while changing the tool.
� During selection, the direction of rotation should be changed approximately 5
times per second. The gears normally mesh at the first direction of rotation
change so that selection times of between 300 and 400 ms can be achieved.
The ”oscillation” function is provided in the SIMODRIVE 611 analog drive converter
for this purpose.
� The gearbox stage should not be changed without oscillation.
� The motor may only start to accelerate 200 ms after the changeover has been
completed.
� The selection must be monitored using a time relay. After 2 s, the selection
must be reversed, if the selection command was not able to be executed.
A time limit of 10 s should be provided for approx. 4 to 5 additional selection
operations.
Initiate a gearbox stage change
Brake the AC motor from the operating speed down to zero speed.
Maintain the controller enable at the transistor PWM converter.
Initiate the ”oscillation” function (select terminal)
Selector unit for the gearbox stage change ON Selector unit back to the initial setting
No
Has the gearbox
stage change been completed
within 2 s? (feedback signal from limit
switch S1 or S2 from the gearbox
selector unit)
Yes
Cancel the ”oscillation” function
Repeat
gearbox
stage
change.
No
Yes
Gearbox stage change was not
successful, shutdown the AC motor.
Selector unit OFF after 200 ms Check the system
Gearbox stage change completed
Fig. 3-7 Function sequence when changing the gearbox stage
4 to 5
gearbox stage change
attempts executed?
(duration, approx. 10 s)
3-71