Programmable Power Systems

At ETPS we provide tools that accelerate innovation. We are specialists at designing, planning and testing best-in-class systems that allow you to stay ahead of the power curve.

Our programmable power systems can simulate virtually any power feeding or consuming condition within a test set-up, so that individual components can be optimised. Both unidirectional and bidirectional models are offered as standard. A wide range of voltage, current and power ranges are available cater for virtually any R&D requirement.

Due to their exceptional technical features, our systems are used on a wide variety of prestigious scientific projects. From helping power Noble Prize winning experiments, to driving world leading academic and OEM research.

If a standard product range doesn't exactly match your requirement, then we will look to provide a custom solution. Output values, ramp profiles, voltage polarity, input range and response times can all be tailored to suit specific test and development needs. Mechanical modifications are also possible to protect against shock, vibration & humidity.

Flight case and lab rack integrations are possible for 19" rackmounting systems. Common options include mains cables, passive indication of any residual DC voltage, isolation monitoring of DC cables and a panel mounted emergency stop.

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Bidirectional DC

Bidirectional power systems can operate as either a DC source or load. This integrated approach features high dynamics enabling users to switch quickly between quadrants. Both modular systems and high power cabinets are available. When operating as a load each unit has power recycling technology. The inbuilt monitoring system synchronises with the grid and regenerates any excess DC energy back to the three phase mains supply.

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DC Sources

ETPS provide one of the most comprehensive selections of programmable DC sources on the market. Virtually any power, voltage or current requirement can be met. Adjustable power and resistance limits are offered in addition to standard CC and CV operation. Besides bench or laboratory units, our DC sources can be rackmounted or built as an ATE system controlled via a remote control interface. Modular designs are available which are easily expandable.

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High Voltage Power

ETPS's high voltage power supplies are available in a variety of different case sizes. From PCB mount modules to 19" rack cassettes, our HV PSUs are suitable for many applications. Individual modules can be fitted into crates and mainframes which allow up to 480 output channels to be controlled from one device. Highly precise and stable voltages up to 100kVDC are possible. Common form factors such as NIM, CAMAC and VME are all present in the range. A variety of computer and analogue interfaces can be fitted.

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DC Electronic Loads

DC electronic loads mimic the real world operating conditions for a variety of applications. Each unit can be built with analogue and computer interfaces to allow remote operation. LabVIEW drivers are also available for most product families to simplify integration into wider test systems. A comprehensive mix of voltage and current sink ranges are possible. Common operating features include OVP/OCP tests, front panel memory as well as CC, CV, CR and CP modes. In dynamic mode rise, fall and plateau times are adjustable. Grid-tied power recycling loads are available.

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AC Electronic Loads

Most of our AC loads are installed with a bank of 55 common waveforms, containing crest factor variations which replicate high current peaks. Adjustable power factor is available from unity to 0 lagging or leading. Power sinks are available from 300W to over 180kW. A dedicated DC mode is provided as standard, allowing for the loading of DC devices, thus saving lab space. By using the dynamic function, constant voltage and constant power sinking can be achieved. Power recycling AC loads are available on request.

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Four Quadrant Systems

A four quadrant power system can operate as either an AC power supply or an AC load. This is particularly useful when researching and testing grid related products with bidirectional AC power flows. Systems with individually adjustable phases are available, which provide up to 3 power systems from one unit. Phases can be individually programmed for V & I limits, frequency, phase angle and superimposed harmonics up to 5kHz.

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Single Phase AC Sources

A single phase AC source can simulate mains/line voltages during R&D and production testing. Linear, switch mode and motor driven models are all present in the range. Common waveforms are pre-installed, with the ability to edit voltage and current parameters. Popular features include variable frequency, adjustable phase angle, programmable ripple and constant current. A wide choice of analogue and computer interfaces can be fitted for system integrations. Fixed output values are possible if the unit is required to act as a simple converter.

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Three Phase AC Sources

The programmability of our three phase AC sources allow virtually any line condition to be created. Every system features a sinewave output as standard. Other waveforms such as square, sawtooth and triangle are possible, allowing a wide variety of operating scenarios to be simulated. Real world load balancing grid processes, such as ripple control, can be superimposed onto existing waveforms. Output frequencies up to 2kHz are possible allowing aerospace power sources to be accurately recreated, which commonly operate at 400Hz and above.

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Current Shunts

Current shunts are used to measure electrical currents from a small voltage drop created across a high precision resistor placed in series with a load. All ETPS models feature 5 ultra-stable shunts, with the appropriate resistor selected by the simple push of a button. Each unit is built into a desktop case and features an AC/DC current meter as standard which displays the respective shunt current.

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