Product Description:

The PSI62C0.633-W1 is a medium-frequency inverter produced by Bosch Rexroth Indramat within the PSI Frequency Inverters series. The unit converts three-phase mains power into controlled medium-frequency output used to drive induction heating coils, high-current welding transformers, or similar loads in automated production lines. By managing current and voltage precisely, the inverter enables energy-dense processes that require regulated power and cycle-synchronized operation with motion or machine control systems.

Electrically, the inverter accepts a three-phase supply between 400 – 480 VAC, which matches common plant distribution levels. From this input, it can deliver up to 1200 A of output current, while routine operation uses a 220 A system value to limit conductor heating. The internal power stage is rated for a prospective secondary surge of 54 kA, so busbars sized to 95 mm² can be connected without derating. Control electronics are energized by a 24 V DC logic rail and remain stable between 19 V and 30 V. Protection against accidental contact is provided by an IP 20 enclosure rating, so the drive must be installed in an electrical cabinet. Cabinet heat dissipation is 69 W in idle mode and can climb to 210 W under maximum electrical stress.

Thermal management is based on a water-cooled platform that moves 4 L/min through the heat exchanger, and the liquid may enter at temperatures up to 30 °C. Under continuous full-power duty, the power modules reject as much as 700 W of cooling loss, which is carried away by the coolant stream instead of the surrounding air. A TriCore processor drives modulation tasks, and its instruction cycle is synchronized to a 1 kHz switching rate that is also broadcast over a DeviceNet timer channel for coordinated operation with external controllers. The coolant circuit and switching control support welding transformers that demand quick current transitions.