Product Description:

The TVD 1.2-08-03-S100 is a power supply module manufactured by Bosch Rexroth Indramat for the TVD Power Supply Modules series. It converts three-phase line power into a stabilized DC link for Indramat drives, allowing coordinated motion axes to share a common energy source and return excess energy through an internal bleeder circuit. By supplying both high-energy DC power and several low-voltage control rails, the unit supports drive controllers, I/O electronics, and regenerative braking functions within automated machining cells and material-handling lines.

The module accepts a three-phase AC mains connection and synchronizes with plant grids running at 50/60 Hz. Its rectifier and filter network establish a DC bus of 320 V, yielding continuous bus power of 7.5 kW and short-term bursts up to 22.5 kW during rapid acceleration. Control supplies are delivered independently: 24 V at 7.5 A for logic, plus ±15 V rails at 2.5 A and 1.5 A for analog circuits, totaling 300 VA of auxiliary capability. Design version 2, identified by the 1.2 code, incorporates 40 Ws per millifarad of energy storage to smooth bus fluctuations. The line-side input must remain within the supported three-phase operating range so the internal capacitors and transistorized bleeder can manage voltage changes without derating.

Regenerative dissipation is handled by a resistor assembly rated for 20 kW at a bleeder threshold of 425 V. The circuit can absorb up to 30 kWs of braking energy per event and sustains 0.5 kW continuously when axes decelerate during positioning cycles. Continuous power delivered to the drive lineup is limited to 6 kW, matching medium-size servo groups. When stored energy rises above the threshold, the bleeder conducts to keep the DC link within allowable limits and protect downstream inverters.