PSI63C0.759-W2 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat PSI63C0.759-W2 is a medium frequency inverter from the PSI Frequency Inverters series. It operates with a mains voltage between 480 and 690 VAC, a control supply voltage of 24 V DC, and is water cooled with a maximum output current of 800 Amps. The unit offers IP20 protection and functions with a clock frequency of 1 kHz.
Internal Product Review
The PSI63C0.759-W2 is a medium frequency inverter with water-cooled thermal management. Support for 480 - 690 VAC mains input and 800 A maximum output current makes this unit especially appealing for high-demand induction heating service.
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Product Description:
The PSI63C0.759-W2 is a medium-frequency inverter from Bosch Rexroth Indramat’s PSI Frequency Inverters series. This unit converts high-voltage three-phase power into a controlled medium-frequency output that drives induction heating coils, hardening systems, or other process loads. By modulating its internal power stage, the inverter supports precise energy delivery, making it a critical link between the plant mains and equipment that demands stable, adjustable medium-frequency current. This operating role helps process equipment maintain repeatable heating behavior during changing load conditions.
It operates from a mains window of 480 – 690 VAC, permitting direct connection to industrial high-voltage feeders. Internal control electronics are powered separately by 24 V DC, so logic and gating circuits remain active during line disturbances. Pulse-width modulation is switched at 1 kHz, a frequency that balances switching loss with current ripple. Under steady conditions the inverter delivers a nominal system current of 110 A, yet the power stage can supply up to 800 A on the primary side and as much as 36 kA on the secondary, giving ample headroom for short heating bursts. Timing and diagnostic data are exchanged through an EtherNet-based timer interface, simplifying communication with higher-level control equipment.
Thermal management relies on a water-cooled plate that removes the basic cabinet loss of 100 W and keeps enclosure dissipation below the 140 W ceiling. When the inverter is driven at peak levels, the exchanger can carry away up to 500 W of heat, maintaining semiconductor junctions within limits. Operation is permitted in ambient temperatures up to 55 °C, and the housing carries an IP 20 degree of protection for installation inside a sealed electrical cabinet. Surge events on the mains are clamped by a MOV network, while the water-cooled design helps reduce acoustic noise during operation. The enclosed layout also supports use in industrial cabinets where conductive debris and accidental contact must be controlled.
