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:
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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
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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 :
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Regulated 7V-6500A power supply intended for the polymerisation of insulator on high voltage cables.. |
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Cathodic Protection |
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Power supply regulated through medium frequency cut-off
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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 |
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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: :
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Multiple power supply (61V-290A/81V-105A/44V-105A) for the coal resistance furnace of a PVD (Physical Vapour Deposition) line |
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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 :
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.
