PSI62C0.776-W1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat PSI62C0.776-W1 is a medium frequency inverter from the PSI Frequency Inverters series. It has a mains voltage range of 400 to 480 VAC and a nominal mains current of 220 Amps. The unit features water cooling, weighs 56 kilograms, and operates with a cooling water flow minimum of 4 liters per minute.
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Product Description:
The PSI62C0.776-W1 is a medium-frequency inverter produced by Bosch Rexroth Indramat within the PSI Frequency Inverters series. As a power conversion module, it delivers controlled alternating current for induction heating, welding heads, or hardening coils that operate above standard mains frequency. The unit serves as the central link between a 400 V class supply and the tooling, providing finely timed energy bursts through its EtherNet timer interface so motion controllers can synchronize thermal processes with machine cycles. It is suited to applications where repeatable heating cycles must follow axis motion or controlled dwell time.
This inverter operates from a three-phase feed of 400 – 480 VAC and draws a mains nominal current of 220 A during rated output. Water cooling removes up to 700 W of internally generated heat, and the integrated channels maintain semiconductor temperatures while keeping the enclosure in a stable operating condition. A primary voltage frequency of 1 kHz lets the power stage couple efficiently to medium-frequency transformers, supporting rapid magnetic reversal in induction coils. Heavy-duty busbars with a cross-section of 95 mm² accommodate the supply conductors, and the electrical layout supports high-current cabinet wiring with low-loss power transfer. A 24 VDC, 2 A auxiliary supply powers the gate drivers as well as the EtherNet timing circuitry, so control functions remain separate from the high-power path.
For transient demands, the converter can deliver a primary current of 1200 A, and downstream circuitry can see secondary pulses reaching 54 kA. These current levels support short, high-energy process windows without requiring the unit to remain at peak load continuously. Cabinet losses are limited to 210 W, allowing compact installation when combined with external ventilation. Continuous service requires a coolant flow of 4 l/min, which produces a 0.6 bar pressure drop across the internal plate heat exchanger. The cooling circuit must maintain steady flow so the heat exchanger can remove pulse-related losses during repeated operation, and the chassis weight of 56 kg must be considered for panel reinforcement during mounting.
