High Performance Power Supplies
  • 1 Transformers
    Resistors
  • 3 Cyclotron Power Supply
    Driver Amplifier
  • 5 High current rectifier
    7V – 6500A
  • 4 MOSAIC System
    Modular CIME HPPS
  • 2 RF Final Amplifier
    Anode Power Supply

Rectifiers – Battery Chargers

JEMA offers a very broad range of rectifiers, stabilised power supplies and battery chargers, for use in diverse sectors (industry, infrastructure...). In addition to our standard range, our research department also develops numerous special power supplies, high tension as well as high current, responding to the most exact specifications and demanding constrains of our clients. .

Different architectures may be implemented:

  1. Transformer-Rectifiers with natural commutation


Single-phase transformer and double alternation rectifier bridge
                     Power from 1kW to tens of kW

Three-phase transformer and six-phase rectifier bridge
                    Power from 1kW to hundreds of kW
Special Series
                    Other couplings on request

  1. Single-phase and three-phase regulated thyristor power supplies
     

In these power supplies, rectification is performed by means of mixed thyristor and diode bridges or, more often, by means of complete thyristor bridges. A passive filter (or an active filter if necessary) allows them to obtain the residual wave characteristics desired..

  • Standard stability of 1% (higher stability on demand)
  • Produced on a chassis or in a casing
  • Variable and regulated output characteristics over the range 0-100%

Applications :     

  • Industrial rectifiers (Steel industry, Power supplies for DC motors, Drive systems...)
  • Test benches
  • Aerospace
  • Cathodic protection

                           Power : from 1kW to 1MW

Production examples :

 

Regulated 7V-6500A power supply intended for the polymerisation of insulator on high voltage cables..

 

 

 

 

Cathodic Protection

 

 

 

 

 

 

 

 

  1. Power supply regulated through medium frequency cut-off

Buck Principle:

Rectifier Bridge followed by a filter and a DC/DC converter

Complete soft commutation converter (ZVS or resonant); rectifier followed by an H converter and insulation transformer

Power: 10kW to hundreds of kW

Puissances : 1kW to tens of kW

These two architectures are implemented with cut-off frequencies from 12 to 25 kHz


Production examples: :

Multiple power supply (61V-290A/81V-105A/44V-105A) for the coal resistance furnace of a PVD (Physical Vapour Deposition) line

 

 

 

 

 

 

  1. Battery chargers

The electronic architectures above are implemented at nominal habitual tensions of 12V/24V/48V/110V/220V DC

  • Several charging regimes are possible
  • Compensation for tension according to temperature

 

Applications :

Alimentation mobile 750V-60A

 

Industrial no break power supplies (No Break DC)
No break power supplies (No Break DC) for computer rooms
Signalling/Points - Public transport stations
Emergency circuits for Sub-Stations
Mobile chargers

Our standardised series are mounted and wires on plates for incorporation into more complex equipment or mounted in casing.