Product Description:

The PSI6300.637-W1 medium-frequency inverter is produced by Bosch Rexroth Indramat for the PSI Frequency Inverters series. It converts three-phase mains power into a regulated high-frequency output so induction heaters, weld power supplies, and similar loads can operate with tightly controlled energy. This controlled output helps the connected process maintain repeatable power delivery from cycle to cycle. Installed in a machine cabinet, the unit serves as the power stage of an automation cell, while separate logic power and water cooling support continuous operation when enclosure temperatures are high.

The inverter accepts input from 400 – 480 VAC and uses a control clock of 1 kHz to sequence its switching devices. Under transient demand, it can source up to 800 A, and its nominal system current is 110 A during steady operation. The enclosure is rated IP20, so the assembly must be installed behind a cabinet door to prevent direct contact with energized parts. Logic and sensor circuits run from an isolated 24 V DC supply, which separates low-voltage control functions from the main power section. Cabinet ventilation removes 110 W of loss, and power leaves the drive through 50 mm² terminals that connect to a matching transformer whose secondary can deliver 36 kA pulses. Commands, status, and diagnostics are exchanged over the DeviceNet I/O interface for integration with PLC networks that use that bus.

A water-cooled jacket removes 420 W of switching heat from the power section. For proper cooling, the coolant flow should be 4 l/min, and the inlet temperature should stay below 30 °C. The cooling circuit connects through an M16 × 1.5 fitting, and flow monitoring is linked to an internal timer implemented on DeviceNet. Cabinet electronics remain stable as long as ambient air does not exceed 55 °C, which supports operation in heat-intensive production zones.