One of the main factors to consider when choosing the right power supply for Xenon lamps is residual ripple, a phenomenon known in electronics and electrical engineering as “Ripple”.
A low percentage of Ripple is synonymous with high quality DC power supply.
In the field of Power Lighting, Xenon lamps are distinguished, compared to other types of light sources, for the particular characteristic of emitting a light very similar to the solar one.
Thanks to this feature, Xenon lamps represent the ideal light source to meet stringent lighting requirements in specialized fields such as, for example:
- high quality solar simulation in the scientific and industrial fields
- special lighting with searchlights
- lighting for events with Skytracker
- cinema projection
- lighting for microscopy
The basic requirement for Xenon lamps is the type of power supply, which must be direct current (DC). In fact, it is not possible to connect these lamps directly to the alternating current (AC) electrical network, but a specific powering is required, which can only be supplied by particular power supplies capable of transforming alternating current into direct current.
Current ripple: phenomenon and undesirable effects
The DC current generated by the power supplies (AC / DC converters), unlike the perfectly leveled one that can only be supplied by the batteries, has the characteristic of being superimposed with a residual percentage of the alternating component, the Ripple.
This phenomenon is caused by the first straightening of the power supply which can be dampened only through the design of particular circuit configurations and filtering elements inside the power supply itself.
The phenomenon of current Ripple is a very important factor also in the field of power supply of Xenon lamps, in fact, the manufacturers of the same lamps impose power supply specifications with limit values to be respected. It often happens that the residual ripple of a power supply meets the limits imposed by the lamp manufacturers but, despite this, it is still excessive for the final application. If the power supply has not been specially designed to reduce Ripple as much as possible, this phenomenon can cause a series of problems both for the lamp and for the application, such as:
- Anomalous deposits on the anode of the Xenon lamp
- Premature aging of the Xenon lamp
- Poor quality of the light emitted (e.g. flicker)
- Performance problems in the final application
- Increased maintenance intervals for frequent lamp replacements
Only power supplies designed with high quality standards, such as those manufactured by IREM, allow the Ripple phenomenon to be reduced and thus guarantee high performance in the final application and long life of the Xenon lamps.
IREM’S SOLUTION TO THE PHENOMENON OF THE CURRENT RIPPLE:
ELECTROMECHANICAL RECTIFIERS AND ELECTRONIC POWER SUPPLIES
IREM offers a wide range of Electromechanical Rectifiers and Low Ripple Electronic Power Supplies. Depending on the Rectifier / Power Supply model, the residual percentage can be up to 10 times lower than the limits prescribed by the main manufacturers of Xenon lamps.
ELECTRONIC POWER SUPPLIES FOR SHORT ARC XENON LAMPS
A complete range of high quality electronic power supplies expressly designed to ensure correct operation and long life to short arc xenon lamps from 150 to 10000W.
They meet all the requirements of lamp manufacturers and have been designed in compliance with the main International Standards.
The single-phase and three-phase electronic power supplies offer a wide variety of solutions. Both versions are fitted with galvanic insulation, soft inrush current, a very low ripple value, a stable output current and high efficiency. Remote control can be carried out either through analogical dry contacts, or by means of the digital interface RS 232.
The control of the most important lamp parameters, and in particular the electronic overpower control, guarantees a correct lamp operation in all aging conditions and allows long life.
Their compact design, light weight and advanced technology make the units suitable for a wide variety of applications.
RECTIFIER POWER SUPPLIES FOR SHORT ARC XENON LAMPS
A complete range of high quality rectifier power supplies specially designed to ensure correct operation and long life to short arc xenon lamps from 700 to 15000W.
The whole range of these three-phase rectifiers is characterized by galvanic insulation, a soft inrush current, a low residual ripple value and a stable output current. These rectifiers are equipped with IREM special transformers and an exclusive magnetic shunt allowing a constant and linear regulation of the lamp output power.
Their new and peculiar design guarantees a low acoustical noise.
They are designed for continuous duty at ambient temperature up to 40°C.
They are equipped with on-off control switch and three terminals for the on-off remote control.
RECTIFIER POWER SUPPLIES FOR SHORT ARC XENON LAMPS
This single-phase portable rectifier has been designed to ensure correct operation and long life to short arc Xenon lamps of 1000W. It is characterized by galvanic insulation, a soft inrush current, a low residual ripple value and a stable output current. The tap transformer allows to regulate the output current by changing the output current selector position, and a special circuit avoids the lamp turning off during the tap switching. A boost circuit provides the necessary no-load voltage in order to guarantee the right lamp condition for the ignition, and the output filter guarantees a low output current ripple value. Its robustness makes it particularly suitable for a wide variety of applications.