Electrical connection
8.3 System integration
1FW68 radial segment motors
Configuration Manual, 08/2021, A5E51132930B AA
171
Checking the phase voltage and pole position angle using an oscilloscope
Procedure
1.
Carefully observe the fundamental safety instructions and safety instructions relating to
electrical connection.
2.
Switch the drive line-up into a no-current condition.
3.
After the DC link has been fully discharged, disconnect the motor cables from the Motor
Module.
Disconnect the parallel circuit connections between the stator segments.
4.
Using 1 k
Ω
resistors, create an artificial neutral point for each stator segment.
①
Stator segment
②
1 k
Ω
resistor
Figure 8-11 Arrangement for measuring
5.
Rotate the rotor clockwise, keeping the speed as constant as possible. If you cannot
manually rotate the rotor, follow the separate description below, "Procedure to rotate
the rotor".
6.
For all stator segments, measure and check the phase sequence and phase position of
the EMF.
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