Product Description:

The TFM 3.1-030-300-W1-115 belongs to the TFM Variable Frequency Drives series produced by Bosch Rexroth Indramat. As a variable-frequency drive, it rectifies three-phase mains power, builds a regulated DC bus, and then inverts that energy to control the speed and torque of induction or synchronous motors used in conveyors, pumps, and material-handling stations. Integrating speed regulation at the drive level allows a PLC or motion controller to match motor output to real-time load requirements, which helps reduce mechanical stress on connected equipment. This operating method also supports smoother starts, controlled acceleration, and steadier process speed when the driven load changes during operation.

The internal cooling circuit relies on a built-in fan. This active airflow removes switching and conduction losses so the power stage can deliver its rated 30 A without thermal derating. The inverter’s DC link is fixed at 300 VDC, which limits the peak phase voltage available at the output. Fan power comes from an auxiliary supply of 115 VAC, and the fan motor operates on line frequencies between 50–60 Hz. Using a separate fan supply keeps airflow available regardless of motor speed or output frequency, and it helps maintain stable temperatures around the heat sink and power semiconductors.

The cooling module uses a dedicated fan connector coded as 219 118. The electronics maintain full functional accuracy in ambient temperatures from 0 to +45 °C; outside that range, the drive must be derated or used with forced ventilation. For periods when the plant is powered down, non-condensing storage can occur between -25 to +55 °C. Short-term transport is acceptable from -25 to +70 °C. If the unit has been exposed to low transport temperatures, it should return to the permitted operating range before power is applied.