RPSu range

High Precision Power Supply

  • Unipolar one quadrant.
  • Max current/voltage 300A / 60V.
  • Long term stabilty: 2ppm.
  • High resolution.
  • 7 control modes including current, voltage and hybrid.
  • Real time ppm dynamic calculation.
  • Data base store 16GB > 30 years without erasing.
  • Active input filter and Power Factor 1.
  • Very low harmonic distortion.
  • Noise inmunity.
  • Zero thermal drift.
  • 94% efficiency.
  • Intelligent ground connection through control. Precision (nA) ground current monitoring for load ground insulation check. Ground fuse permanent check.
  • Intelligent cooling control with maintenance warning.
  • User friendly local interface with 7 inch size display.
  • EPICS control.
  • MODBUS over TCP/IP control.
  • DCCT Technology.
  • Remote sensing input channels.
  • Small size and weight.
  • Centralized switch-on for a group of power sources.

DCCT Technology

To close the slow control loop a DCCT is used, with this long term stability less than 2ppm is achieved.

LDO references

Digital converters ADC and DAC are powered by LDOs. This linear technology avoids commutations and noise. This means that the converter instrumentation is high accuracy and clean voltage.

Active temperature monitoring

Key points temperature is monitored in the converter. Points such as semiconductors, high frequency transformer, input and output fans are controlled to ensure the correct operation of the device and to prevent possible failures.

Remote sensing

Remote voltage sensing to avoid voltage drop in cables by measuring real voltage on the load.

Long term data storage

RPSu stores many parameters in a database. Those parameters can be displayed on charts, user can choose which parameters to display. All parameters data are stored from the first day of operation of the RPSu. Those can be downloaded from USB port.

Noise immunity

· Switching semiconductors are driven by means of an optical fiber digital transmitter, achieving the highest performance in terms of speed, bandwith, attenuation and noise immunity.
· Optic fiber drivers.
· The power supply uses a high frequency transformer designed to minimize the dispersed flow, preventing induced currents and noise generation.

Viena rectifier

· RPSu has an active power factor corrector (PFC=1) based on the Vienna Rectifier.
· This topology also provides with an active input filter and very low harmonic distortion.
· Efficiency 97%.

RPSu: EPOWER SYS range of high stability programmable DC power converters. Switched topology. Scientific research and industrial applications.


High current output

  • RPSu can deliver up to 300A of maximum current and 60V of maximum voltage at 12Kw of maximum power.
  • As an option RPSu may be equipped with a bipolar output stage for two quadrant operations by means of a polarity reversal switch.


  • Particle accelerator magnets supply.
  • Test & Measurement systems.
  • Medical Imaging and treatment systems.
  • Semiconductor Processing.

Control modes

  • Constant current: often used to power magnets.
  • Constant voltage: normally used in industrial applications.
  • Hybrid: both voltage and current can be programmed.
  • Power: set point can be programmed in watts.
  • Analog voltage and current: this mode works as regular current or voltage mode, except that set point is programmed via analog input 0-10V.
  • Function generator: dynamic set point follows programmed curves. Any curve can be programmed (up to 50Hz), and it is available in current, voltage and power.

Accuracy and resolution

  • Long term stability 2ppm.
  • Output precision is not affected by room temperature changes. Data acquisition electronics active thermalization by means of a Peltier chamber and digital temperature control loop (warm / cold). Temperature drift negligible.
  • Readback Resolution: 31bits Slow accuracy loop @ 24bits Fast loop.
  • Current and Voltage Setting resolution: 22,5 bits <100uA.
  • Reliable performance is essential on scientific and industry applications.

Real time PPM calculation

RPSu displays in real time accuracy in PPM for the present load in screen and in graph. This feature is especially useful for adjusting control loops.



Programmable DC Power Converters 750W - 12kW RPSu Series


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