For the sourced permanent-magnet motors, confirm the matching controller and feedback arrangement. View controller families
Treat the motor and drive as a system
A variable-speed drive controls the electrical supply to vary motor speed. Compatibility depends on the motor, drive, load and installation; a general-purpose motor should not be assumed suitable for every drive application.
Describe the operating envelope
| Topic | Information for review |
|---|---|
| Load & speed | Driven equipment, torque demand, minimum / maximum speed and time spent at each operating point. |
| Motor cooling | Low-speed running time, ambient conditions and proposed cooling arrangement. |
| Drive information | Drive make, model, voltage, rated current and available application settings. |
| Installation | Motor cable length and construction, earthing arrangement and installation environment. |
| Motor provisions | Supplier requirements for insulation, bearings, temperature monitoring and any filters. |
| Control behaviour | Starting, acceleration, braking, reversing and overload demands. |
Ask for application confirmation
Provide the complete operating envelope to the proposed motor and drive suppliers. Ask for their compatibility conditions, any required accessories and the limits on continuous operation.
For an existing installation, retain its drive parameters and machine documentation for the responsible engineer’s review.