Rockwell-automation 8510 AC Spindle Drive System User Manual Bedienungsanleitung PDF herunterladen (Seite 141)

Troubleshooting

Chapter 11

11-137

IGBT Test Procedure The following procedure provides the steps needed to properly test the

IGBT modules to determine if replacement is necessary.

1. Remove all power to the drive. Remove the front cover from the drive.

2. Label and remove the three motor wires from the drive terminals U, V

and W.

3. Access to the IGBT modules must be gained by removing the

following boards:

On 8510A-A04 and A06 drives remove the CPU, Gate Drive and I/O

Boards.

On 8510A-A11 and A22 drives remove the Main Control (and I/O)

Board.

4. The 8510A-A04 and A06 drives have two modules, while the

8510A-A11 and A22 drives have six. For proper testing, each module

must be checked four different ways. The procedure for 8510A-A04

and A06 drives is shown in Figure 11.5. The procedure for 8510A-A11

and A22 drives is shown in Figure 11.6.

On 8510A-A11 and A22 drives the IGBT module will have 4 spade

lugs for the gate connection. Use these as a reference point for

orientation.

Measurements must be taken with a Digital Voltmeter (DVM) equipped

with a “Diode” setting. The connection polarity for the meter is shown

in each figure.

A reasonable ohm reading would be 1 meg to infinity. A reasonable

voltage drop would be 450 - 700mV. If a measurement differs

appreciably from these values, the module is bad and the Power Unit

must be replaced.

5. When testing/replacement is complete, replace board(s), cover and

check for proper operation.

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Rockwell-automation 8510 AC Spindle Drive System User Manual Bedienungsanleitung Seite 141