PSI63C0.637-W2 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat PSI63C0.637-W2 is a medium frequency inverter from the PSI Frequency Inverters series, featuring a max output current of 800 Amps and a nominal current of 110 Amps. It has a water cooled system with a maximum water inlet temperature of 30°C and a flow requirement of 4 liters per minute. This inverter offers a protection rating of IP20 and supports mains voltages from 480 to 690 VAC.
Internal Product Review
The PSI63C0.637-W2 is a medium frequency inverter with water-cooled thermal management for demanding power conversion duties. Recessed mounting and IP20 protection support clean cabinet integration in controlled industrial environments. A 480 to 690 VAC mains range stands out as a strong advantage for flexible plant deployment.
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Product Description:
The PSI63C0.637-W2 is a drive module manufactured by Bosch Rexroth Indramat and positioned within the PSI Frequency Inverters series. Designed for medium-frequency induction heating, welding, and similar processes, the unit converts a three-phase high-voltage mains supply into a controlled intermediate-frequency output suited to resonant transformers and work coils. Its role in an automation line is to deliver adjustable current and precise timing so that thermal profiles or power densities can be matched to material requirements without mechanical tap-changing or fixed-frequency generators.
Operating from 480 – 690 VAC utility lines, the inverter regulates its H-bridge at a carrier of 1 kHz, enabling smooth sinusoidal shaping of the secondary waveform. The unit provides a nominal output of 110 A, while accelerated duty cycles can draw up to 800 A for controlled intervals before protection limits engage. Downstream, the matching transformer can receive as much as 36 kA of secondary current, which is needed for low-impedance heating loops. A MOV network provides overvoltage suppression on the DC link, and recessed mounting reduces cabinet depth when the unit is installed. For terminations, aluminum or copper conductors up to 50 mm² on the line side and a separate 35 mm² control wire can be connected on spring-clamp blocks, and timing control is handled by the integrated DeviceNet timer.
Thermal management relies on a water-cooled heat sink that demands 4 l/min through twin M16 × 1.5 fittings. Inlet temperature is limited to 30 °C to keep cabinet losses to 100 W even when ambient air reaches 55 °C. The exchanger and sealed housing together achieve an IP20 protection rating, so the electronics remain guarded against accidental finger contact and the unit must stay inside a closed panel.
