Programmable DC power supply series saves space and weight

24th May 2017
Caroline Hayes

The first model in a 1U, programmable DC power supply series has been introduced by TDK-Lambda. The Genesys+ 5kW output uses digital signal processing (DSP) to improve efficiency, said the company.

Housed in a 1U high, 19inch (483mm) wide rack package, the 5kW power supply is claimed to offer the highest power density, up to 33% more than alternatives currently available, and more than halves the weight of comparable products at just 7kg. It doubles the density of the existing Genesys 5kW 2U series.

Five voltage models are available initially. The series is made up of 0 to 10V/500A, 0 to 20V/250A, 0 to 30V/170A, 0 to 300V/17A and 0 to 600V/8.5A. They operate in constant current, constant voltage or constant power modes and offer internal resistance simulation. They can accept three-phase 170 to 265Vac, 342 to 460Vac or wide range 342 to 528Vac inputs, with active Power Factor Correction. Operating efficiencies are up to 93%.

In addition to increasing power density, the Genesys+ offers a high contrast, wide viewing angle LCD, with user controllable brightness and dimming functions for improved readability and display life. Faster up and down programming response times speed up operation with user adjustable voltage and current slew rate control to speed up throughput rates.

Two user programmable output control pins (open drain) activate external devices, such as load disconnect relays, which have been added in this design. Arbitrary waveform profiles, such as car battery simulation at vehicle start up, of up to 100 steps can be generated and stored in four memory cells and activated by commands from the communication ports or the front panel controls.

A parallel master/slave system allows multiple power supplies to achieve dynamic response and ripple and noise performance comparable to that of a single power supply, says the company. It is scalable to 20kW, with up to four units able to be connected in parallel via a single data link cable (provided) between units and connecting the DC outputs in parallel. The master and slave units detect the parallel data connection and set parameters accordingly to auto-configure. Communciations interfaces include LAN (LXI 1.5), USB 2.0 or RS232/485, which are provided as standard. An isolated analogue control and monitoring interface (0 to 5 or 0 to 10V scale) is also provided and an optional GPIB (IEEE488).
The Anybus CompactCom interface platform is provided as standard, for future-proofing the supply. It enables various interface options as they are introduced, such as Devicenet, Ethercat, Modbus and Profibus. Software drivers, waveform creator and virtual front panel GUI is provided.

Safety features include safe/auto restart, last setting memory and built-in protective functions. With safe-start configured, the power supply will return to its last operational settings after a power interruption, but with the output disabled. Auto restart allows the power supply to return to the last used operation settings after a power interruption. Last setting memory retains settings such as the output voltage/current, output on/off, over-voltage and under-voltage protection levels, fold-back and start-up mode at each AC input turn-off sequence.

Safety certifications include IEC/EN/UL 60950-1 with CE marking for the EMC, LV (low voltage) and RoHS Directives. The series conforms to the industrial environment IEC/EN61326-1 standard for conducted EMI, radiated EMI and EMC immunity.
The new series is compatible with both the company’s Genesys and Z+ models, using the same communication protocols and signals


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