Maintenance and repair
INTORQ | BA 14.0215 | 07/2019
45
8.3.1
Release / voltage
1. Put the motor and the controller into operations.
DANGER
Danger: rotating parts!
The running rotor must not be touched.
DANGER
There is a risk of injury by electrical shock!
The live connections must not be touched.
2. Observe the air gap "s
L
" when the drive is running. The air gap must be zero.
3. Measure the DC voltage at the brake.
– After the over-excitation time, the measured DC voltage must correspond to the holding voltage
(refer to Assignment: Bridge/half-wave rectifier – brake size, Page 39). Deviations up to ±10 are
permissible.
8.3.2
Checking the air gap
DANGER
Danger: rotating parts!
The motor must
not
be running during this check.
1. Shut down the motor and the controller!
2. Measure the air gap "s
L
" near the fastening screws between the armature plate and the stator using a
feeler gauge.
3. Compare the measured air gap to the max. permissible air gap "s
Lmax
". (Refer to the table Rated
data, Page 14 for the values.)
4. When necessary, replace both rotors completely.
