Product Description:

The PSI6100.146-L1 is a medium-frequency inverter produced by Bosch Rexroth Indramat for the PSI Frequency Inverters series. It converts three-phase plant power into controlled medium-frequency energy for induction heating, brazing, and similar industrial processes, providing regulated current and voltage that help maintain precise thermal profiles in automated production cells. When paired with a dedicated transformer and process coil, the unit supports rapid ramp-up and stable hold periods in high-throughput forging lines and other heat-based manufacturing systems. Its controlled output is suited to applications that require repeatable heating cycles and fast process response.

An internal oscillator pulses the IGBT bridge at 1 kHz, producing a near-sinusoidal medium-frequency waveform that helps reduce eddy losses in the workpiece. Control logic and the auxiliary timer are energized from a separate 24 V DC line, which isolates signal electronics from the main bus. The power section accepts supply ranges of 400–480 VAC and can furnish up to 400 A of continuous output to the coil. Short, high-energy demands are supported by a permissible secondary crest of 20 kA, while forced-air channels guide heat away from semiconductors and inductors during sustained operation. Basic cabinet loss is 69 W at idle and rises to 170 W at rated throughput, while full-load cooling loss can reach 360 W.

For mounting inside a switchboard, a clearance of 100 mm around the heat exchanger inlet and outlet is required to sustain the intended airflow. The busbars are rated for a nominal system current of 110 A, and the power terminals accept crimped conductors up to 50 mm². The enclosure has an IP20 protection level for installation in dry, finger-safe cabinets, and integrated metal-oxide varistors clip overvoltage events across the DC link to help limit component stress during line transients.