When a main drive is to be retrofitted on a mechanical press, to start, the drive including the press mechanical system is analyzed. Important data for the new motor is documented and calculated from the mechanical configuration of the press drive. This data includes e.g. the number of strokes per minutes, required acceleration time, required braking time, load torque calculation, speed dip during the actual pressing operation, relationships in the field weakening range, thermal motor check, etc.

After the new motor has been selected, the drive converter is engineered according to the requirements and customer specifications. This includes the infeed-regenerative feedback unit, Active-Front End, braking unit, water cooling, etc. If several drives installed in the same press are to be replaced, then a multi-motor concept with common DC link can be configured.

When selecting and dimensioning the drive converter, special requirements and specifications can be taken into account. These can include low harmonics that are fed back into the line supply, energy saving, regenerative feedback into the line supply, single or four-quadrant operation, special requirements when connected to weak line supplies, kinetic energy buffering, etc.
Selecting and dimensioning the drive also includes drawing-up the complete circuit diagram of the press drive, terminal diagrams, wiring lists, part lists and the mechanical design of the electrical cabinets.

It goes without saying that also all of the options - such as operator interface, bus connection, analog and digital interfaces, filters and EMC measures - are harmonized and coordinated with the machinery construction OEM.