Permanent Magnet Motor Drives; Installation And Maintenance Work; Operation; Application Program - ABB ACS800-37-0060-3 Hardware Manual

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Permanent magnet motor drives

These are additional warnings concerning permanent magnet motor drives.
WARNING! Do not work on the drive when the permanent magnet motor is rotating.
Also when the supply power is switched off, a rotating permanent magnet motor
feeds power to the intermediate circuit of the drive and also the supply connections
become live (even when the inverter is stopped!).

Installation and maintenance work

• Disconnect the motor from the drive with a safety switch
and additionally, if possible,
• lock the motor shaft and ground the motor connection terminals temporarily by
connecting them together as well as to the PE.

Operation

Do not run the motor above the rated speed. Motor overspeed leads to overvoltage
which may result in explosion of the capacitors in the intermediate circuit of the drive.

Application program

Controlling a permanent magnet motor is only allowed using the ACS800 Permanent
Magnet Synchronous Motor Drive Application Program, or using other application
programs in scalar control mode only.
Safety instructions