Infeed Module

An Infeed Module is connected to the Mains supply, and converts AC power to DC and supplies power to the DC bus. Infeed Modules with regenerative capability also feed power back to the Mains Supply.

An Infeed Module consists of one or more sub components. A Infeed Module always has internal capacitance as well as an Infeed stage that supplies power to the DC bus. In addition, some will have a Bleeder Module.

How an Infeed Works & Infeed Types

Infeed Modules are connected to Mains Supply, and convert AC power to DC and feed the DC bus power as the application demands.

Two Infeed types are defined in the database, "Infeed/Regen" and "Infeed":

Infeed/Regen
1. "Infeed/Regen" provides a controlled DC bus voltage within a fixed range.
2. The DC voltage is controlled by a power transistor bridge (similar to the Inverter transistor bridge that controls the motor), and targets a nominal bus voltage, Vo, regardless of the Mains Supply voltage.
3. When an axis motor is generating power to the DC bus, the DC bus voltage rises. When it rises to its Threshold bus voltage, then the Infeed "regens" power back to the Mains Supply.
4. The target Nominal and Threshold bus voltages are specified in the database.
Infeed
1. "Infeed" provides an uncontrolled DC bus voltage, usually via a diode bridge. Ie. The DC bus voltage is a function of the Mains Supply voltage.
2. The DC Nonimal bus voltage is a simple factor of the Mains Supply. In the database, the [SBus] value specifies this factor.
3. SBus = 1.35 is a common value. This means that if the Main Supply is 400Vac, then the Nominal bus volage, Vo = 400Vac x 1.35 = 540Vdc.

Power flow to/from the Mains Supply is reduced proportionally by the infeed efficiency.

Infeed Module Configurations