The purpose of converters is to transform electric energy delivered by a source, in order to adapt it to a particular receiver (i.e. the load). The load may require the following supply :

• Direct current (DC)
  
• Alternate current (AC) at low frequency (e.g. 50 or 60Hz), medium frequency or high frequency.
• Low Voltage High current (Low impedance).
• High Voltage Low current (High impedance).
• Pulse power.

Study of a converter according to customer's specifications, including

• Theoretical calculations and numerical simulations.
• Layout of all PCBs (using CADSTAR or TARGET) with GERBER file generation, and parts list.
• Mechanical drawings of assemblies.
• Prototypes build, with test reports and performance measurements.

Since 1986 Physique & Industrie has been recognized for its innovations in power supplies especially in the very high power domain. Their unique features have defined the state-of-the-art technology. Our exceptionally broad knowledge in the various power circuits topologies, semiconductors, electromagnetism, and mechatronics (integration of electronics with mechanics), make us the ideal partner to find the best converter well suited to your application.

Converters Design

• Switching Mode Power Converters using IGBT, MCT or MOSFET power transistors, depending of the required frequency.
• Innovative topologies using hard-switching or resonant switching in ZVS mode (Zero-Voltage Switching) to improve the converter efficiency and reduce Electro-Magnetic Emissions.
• Switching frequencies from 5 to 100kHz for IGBTs, and 20 to 500kHz for MOSFETs.
• Expertise in massive parallel / series Semiconductors Assembling (IGBTs, MOSFETs, Diodes ...).

Transformer Design

The transformer is often the key element of a converter. Physique & industrie has a unique expertise in designing transformer adapted to each particular converter type, and developed a range of original transformers.

• Planar transformers for high currents (very low impedance)
• Toroidal transformer with nested windings to reduce leakage inductance.
• High voltage transformer with planar secondary and integrated rectifier (very low impedance)
• Transformer with bi-spiral primary and parallel plates secondary (low voltage output, ultra low impedance) - Patent Michel Roche -
• Transformer core material : ferrite, iron-silicon, air, amorphous metal, ...

Products

• DC-DC converter ultra low impedance 25kA 8V 200kW - Typical applications: Spot Welding, Electro-erosion, Electro-plating.
• 3 phase AC-DC bidirectional converter, able to convert the 3 phase AC mains in a DC source, and convert the DC back to 3 phases AC, thus re-injecting the DC power on the 3 phase line - Typical application: battery charging - discharging tester/simulator.
• Power Factor Corrector
• DC-DC High Voltage generator 1MV, 30mA - Typical applications: Electron Beam Accelerator.
• High Voltage Pulsed Power Generator 100kV, 100A - Typical applications: Plasma Immersed Ion Implantation, Lasers, Linac supply.
• Ultra High Power, High Voltage Pulsed Power Generator up to 1TW ! - Typical applications: Lasers, Rock Crushing.

Special High Power Components

• low inductance coil
• high current rectifiers
• Power Factor Corrector
• High power low inductance transformers
• Rogowski coil current transducers (measure alternating or pulse currents in a frequency range from less than 0.1 Hz to 10MHz) with no maximum current limit.
• Hall effect current sensors (measure currents from DC to 100kHz)