Product Description:

The TVD 1.1-08-03 is a dedicated power supply module produced by Bosch Rexroth Indramat and belongs to the TVD Power Supply Modules series. The unit converts three-phase mains energy into a controlled DC bus that feeds multiple drive controllers within an industrial automation rack. By centralizing the supply path, it stabilizes voltage for servo and spindle inverters, allowing coordinated motion sequences and reducing the need for separate rectifier sections in each drive channel. This arrangement lets several axes share one supply stage instead of using separate power sections for each channel.

Stable DC generation is achieved through a regulated bus topology that keeps the link voltage at 320 V under nominal line conditions. The converter handles continuous power of 7.5 kW, making it suitable for medium-size machine tools and material-handling axes. Incoming energy is accepted on a three-phase line, which balances current draw and lowers conductor cross-section requirements. Excess kinetic energy from decelerating motors is dissipated by an internal DC bus dynamic-braking circuit, eliminating the need for an external resistor in most installations. The built-in contactor provides galvanic isolation between the mains and the DC link so that startup and emergency stop sequences can be executed by the control logic.

For short demand peaks, the module supports a feed boost of 300% for 0.3 s, allowing rapid acceleration of auxiliary axes, while a spindle boost of 200% for 3 s accommodates heavy cutting loads without undervoltage alarms. During brownouts, it can tolerate a voltage dip of 20% for 1 period, maintaining motion continuity until the mains stabilizes. Because the supply path is direct to mains, no isolation transformer is required. That layout keeps the incoming power path straightforward in cabinets that already provide the required mains connection. Auxiliary operation through remote devices is supported, and the module is design version 1.