PSI63C0.638-W1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat PSI63C0.638-W1 is a medium frequency inverter from the PSI Frequency Inverters series. It is water cooled, with a mains voltage range of 400 to 480 VAC and supports a supply frequency of 50 or 60 Hz. The inverter features a maximum primary current of 800 Amps and operates with a DeviceNet I/O interface.
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Product Description:
The PSI63C0.638-W1 inverter is manufactured by Bosch Rexroth Indramat within the PSI Frequency Inverters series. Classified as a medium-frequency inverter, it converts a three-phase industrial mains supply into a controlled high-frequency output for induction heating, forging, or melting lines that need tightly regulated primary currents. In automated cells, the unit sits between the power distribution network and the work coil, allowing the control system to modulate energy delivery through a DeviceNet fieldbus rather than discrete contactors. This arrangement helps the process respond smoothly to changing load conditions and supports repeatable heating cycles across production runs.
Mains compatibility extends from 400 – 480 VAC, and the incoming conductors carry a nominal 110 A during continuous duty. Internally, the inverter is water cooled, provided that a minimum flow of 4 l/min is maintained so semiconductor temperatures remain stable. Command and diagnostic data move through a DeviceNet I/O interface, and timing functions are handled by the integrated DeviceNet timer. Bus bars accept a 35 mm² cross-section, while outgoing terminals reach 50 mm², which supports practical cable selection for the power path. The drive synchronizes with plant supplies at 50 or 60 Hz. When production demand surges, the inverter can draw 800 A on the primary side, and its output network supports an operating range of 6 – 36 kA to match different work-coil impedances.
Thermal planning is aided by several fixed loss figures that describe how heat is distributed through the cabinet and coolant path. Under light load, the basic cabinet dissipation is 69 W, while the cooling circuit must absorb up to 360 W when the device operates near peak switching duty. A pressure drop of 0.1 bar across the coolant path shows that heat can be removed without excessive pump head. Cabinet loss under maximum conduction reaches 110 W, so enclosure ventilation and coolant routing should be considered together during system layout.
