Product Description:

Bosch Rexroth Indramat manufactures the PSI64C0.782-W1, a medium-frequency power converter in the PSI Frequency Inverters series. The unit converts three-phase utility power into controlled medium-frequency output so induction furnaces, brazing stations, or other high-current tools in automated production lines can receive precisely metered energy. By embedding the inverter inside a machine cabinet, OEMs gain an integrated source of adjustable current that responds to digital commands from supervisory controllers. It supports programmable sequences that synchronize heating profiles with motion axes, ensuring repeatable metallurgical results.

The power stage accepts a mains input of 400–480 VAC and produces a primary output that can be swept up to 1 kHz. Continuous load is handled at 220 A; for rapid magnetization bursts, the primary circuit tolerates 1600 A, while the matched PSG 3100 transformer lets the secondary deliver up to 54 kA to the work coil. Control electronics draw 24 V DC at 2 A, and sequence memory accommodates 256 program steps so different parts can run on stored recipes. Cabinet heat generated by semiconductor switching totals 210 W, with an additional 69 W classified as basic switch-cabinet losses. Timing synchronization across stations is achieved through an EtherNet timer interface, allowing deterministic start and stop signals within a plant network.

A sealed, water-cooled heat sink extracts up to 700 W of switching losses. The cooling circuit must supply at least 4 L/min of flow, maintain a maximum inlet temperature of 30 °C, and remain below a static pressure of 10 bar. At the rated flow, the pressure drop across the exchanger is only 0.6 bar, and the connections terminate with an M16 × 1.5 thread for direct hookup to common manifold blocks. Heavy copper conductors with a cross-sectional area of 95 mm² are required to carry the inverter’s nominal current without excessive heating.