How does a servo drive work?

Assuming no potential energy sources, energy used to accelerate an axis to its commanded velocity is supplied by the servo drive’s power source. Likewise, a deceleration of that same mass or rotating inertia requires by some physical means, the absorption or dissipation of the stored mechanical energy.

How is kinetic energy stored in a servo drive?

Kinetic energy is stored by the total moment of inertia or mass and the commanded (and achieved) axis velocity. Assuming no potential energy sources, energy used to accelerate an axis to its commanded velocity is supplied by the servo drive’s power source.

How much power does a servo press need?

A transformer with a minimum rated power of 2000 kVA is required. For a complete energy management, the drive system of the press example is expanded to include three kinematic energy storage devices with a maximum power of 1000 kW. As a consequence, it is possible to keep the alternat-ing component of the power in the servo press drive sys-tem.

Does a servo press need energy management?

For a servo press without energy management, the mechanical power to be output by the motor – as well as the power loss of the electric system – must always be completely covered by the infeed and the line supply.

How do efficient servo systems save energy?

Efficient servo systems regenerate that energy by pulling it out of the motors and pushing it back onto the power lines to be used again. An energy saving of 30-40 percent is not uncommon when making the switch from discharge to regeneration systems.

How does a servo drive absorb regenerative energy?

A servo drive absorbs regenerative energy internally with the built-in capacitor. If the regenerative energy cannot be completely absorbed with the built-in capacitor, it is absorbed with the internal regeneration resistor.