Product Description:

The PSI63C0.633-W2 is a medium-frequency inverter produced by Bosch Rexroth Indramat for the PSI Frequency Inverters series. As a dedicated power conversion stage, it takes high-voltage three-phase supply energy and delivers regulated medium-frequency output for induction heating, welding, or hardening equipment in industrial automation. The unit is water-cooled to keep semiconductor temperature stable, and a TriCore CPU oversees modulation, protection, and real-time communication through its native DeviceNet interface.

The inverter draws power from a mains window of 480 – 690 VAC and a nominal line current of 110 A. A peak primary current capability of 800 A supports fast load transients, while the MF stage switches at 1 kHz to create the required induction waveform. Eight DeviceNet inputs and eight DeviceNet outputs are available for process interlocking; the same fieldbus handles the internal timer function specified as DeviceNet. Water cooling requires at least 4 l/min, and with that flow the pressure drop remains 0.1 bar. The design keeps cabinet heat to a minimum, yet total mass is limited to 25 kg so the inverter can be rack-mounted without extra supports.

Base cabinet dissipation begins at 100 W; when the drive operates at maximum current the electronic section rises to 140 W. Heat removed by the coolant circuit can climb to 420 W during continuous heavy duty, so proper chiller sizing is needed. On the secondary side the transformer connection must tolerate up to 36 kA short-duration current, making conductor cross-section and busbar design critical. Environmental sealing is rated at IP20, allowing installation in protected electrical rooms where touch-safe enclosures are already provided. Together, these thermal, electrical, and mechanical parameters define the limits for safe integration into induction power supplies and ensure predictable performance over the full production cycle.