Electrical drive system for production machine, particularly servo press, has electric motor and frequency converter for frequency-variable feeding of electric motor

摘要

The electrical drive system has an electric motor (1) and a frequency converter for frequency-variable feeding of the electric motor. An energy buffer (5) for storing mechanical energy is provided for covering alternating load proportion of the electric motor. Another energy buffer (6) is provided for storing electrical energy, and is dimensioned such that the highly dynamic alternating load proportion is covered from energy stored in latter energy buffer.