Commissioning
9.2 Procedure
9.2.4Measuring the EMF voltages
Procedure for fault messages
If the torque motor was commissioned according to the relevant instructions and unexplained fault messages still occur, then the individual EMF voltages of the torque motor must be checked using an oscilloscope. If unexplained fault messages arise during parallel operation, all EMF voltages of the torque motors being run in parallel must be checked individually.
Checking the phase sequence U V W
If motors are connected in parallel (tandem configuration), the EMF_U of motor 1 must be in phase with the EMF_U of motor 2. The same applies to EMF_U and EMF_W.
It is essential that this is checked by measurement for motor 1 and motor 2 successively as follows:
●Disconnect terminals 48 and 63 from the line infeed module and terminal 663 from the Control Unit.
●You must wait until the DC link has been discharged.
●Disconnect the power cable from the motor. Disconnect the parallel connections between the motors.
●Form an artificial neutral point using 1 kohm resistors.
0RWRU
(0)B:
(0)B9
(0)B8
Figure 9-11 Configuration for checking by measurement
For a positive direction of rotation, the phase sequence must be U V W.
The motor's direction of rotation is positive if the rotor turns clockwise (clockwise phase sequence). For a definition of the direction of rotation, see the chapter titled "Technical features" in PHB 1FW6.
Determining the commutation angle offset
With incremental measuring systems, once the RPI has been performed and with an oscilloscope connected the zero mark must first be traversed in order to synchronize the drive. Only use the oscilloscope to take measurements once the DC link has been discharged and when synchronization has been performed.
With absolute measuring systems, the drive is synchronized straightaway.
1FW6 | 185 |
Configuration Manual, 05/2009, |
