Product Description:

The PSI62C0.177-W1 is a medium-frequency inverter produced by Bosch Rexroth Indramat for the PSI Frequency Inverters series. It converts three-phase supply power into controllable medium-frequency output for induction heating lines, resistance welding stations, and other automated processes that require stable current profiles. Integrated process logic allows the device to supervise up to 32 electrodes from a single cabinet, so multiple weld heads can be synchronized without separate inverters. By keeping frequency and current tightly aligned with each cycle, the unit helps maintain repeatable thermal energy delivery in high-throughput manufacturing cells.

The power electronics are mounted on a water-cooled heat sink that removes switching losses directly to the plant coolant loop. When connected to TN or TT mains networks, the inverter accepts line voltages between 400 – 480 VAC and draws a nominal line current of 220 A during continuous duty. Its H-bridge generates a fixed carrier that permits an adjustable work signal up to 1 kHz, while the output stage can deliver a primary current burst of 1200 A to accommodate short welding pulses. A 32-bit TriCore CPU supervises sequencing, and the 24 V timer hardware coordinates clamp actuation. Application code occupies 256 steps in battery-buffered RAM, so programs are maintained even when mains power is removed.

Thermal data indicate the enclosure requirements for continuous operation. At idle the cabinet base loss is 69 W, and it rises to 210 W when the inverter is driven at maximum modulation index. The water circuit can extract up to 700 W of switching heat, provided that the coolant flow is at least 4 l/min; this flow produces a pressure drop of only 0.6 bar through the internal channels. The electronics are protected to IP20, yet the complete installation must be housed in an IP54 area to shield live parts from airborne contamination and dripping water.