Product description

In most applications, there are situations where regenerative travel sections are created, e.g. due to a vertical drive moving downwards or a horizontal drive slowing down.

In regenerative travel sections, the motor feeds back energy to the frequency inverter's DC link and the DC link voltage increases. Only in few cases is the regenerative energy so low that it can be stored in the frequency inverter's DC link capacities. As a rule, the DC link voltage increases to an inadmissibly high value and causes an error response.

There are several possible solutions to prevent this error response.

• A braking resistor is controlled by a braking transistor and discharges the DC link. The regenerative energy is converted into thermal energy in the braking resistor.
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• A supply and regenerative module feeds the regenerative energy back into the supplying grid. This makes the regenerative energy available to other consumers.
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• Additional capacitors on the DC link store the regenerative energy and make it available for the next travel section in motoring operation.
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This document describes variant 2, i.e. the "Supply and regenerative module".

• Supply and regenerative module
• Filter module
• Differences between sinusoidal and block-shaped energy recovery
• The units at a glance
• Product overview
• FCB concept
• Standby mode
• Module bus