Supply and regenerative module

A supply and regenerative module has two main functions:

• It generates the DC link voltage for the connected axis modules by rectifying the line voltage.
• It feeds energy back into the supplying grid when the DC link voltage increases. If energy recovery is not possible, e.g. in the case of mains supply from an emergency power generator, the integrated braking transistor can control a braking resistor.

The regeneration of the regenerative energy into the supply system is particularly expedient if the following points apply:

• The thermal energy of a braking resistor that occurs leads to consequential costs, e.g. in refrigerated warehouses or in environments where there is an increased risk of fire.
• The energy costs are relevant, and the regenerative energy must not be converted into heat.
• There is a considerable amount of regenerative energy, meaning that a braking resistor would have to be extremely large mechanically, e.g. in crane systems with a long lowering distance.
• The regenerative travel sections are dominant, e.g. in lifting stations which cyclically travel upwards without a load and downwards with a load, or in test stands with loading machines.
• Companies wish to have sustainable operations, and "wasted energy" must be avoided at all costs.

The supply and regenerative modules are used instead of the MDP90A pure power supply modules and are operated together with the MDA90A and/or MDD90A axis modules.

The power supply modules are available in two versions, i.e. with sinusoidal supply and energy recovery or with block-shaped supply and energy recovery.