2006Forum Batteries/Power
Stromversorgung einer ARRI 435-Kamera mit Batteriesystemen für niedrigere Spannung
20 Jahre alt. Geräte und Preise können sich seitdem geändert haben.
Was die Diskussion ergab
- Der ARRI 435 benötigt etwa 17 Ampere bei 28 Volt für einen 14-Millisekunden-Start bei 24 fps, mit noch höheren Stromanforderungen für höhere Bildraten.
- Die Verwendung von zwei NiMH-Batterien zusammen, um eine 24-Volt-Versorgung zu schaffen, bietet möglicherweise keine ausreichende Stromkapazität für die ARRI 435, da die NiMH-Chemie aktuelle Lieferbeschränkungen hat.
- Die Kombination einer NiCad-Batterie mit einer NiMH-Batterie kann eine zuverlässigere Leistung für den ARRI 435 bieten, als die Kombination von zwei NiMH-Batterien desselben Typs.
- Operating at 50 fps with a 12-to-24-volt converter powered by AB Hytron batteries is feasible if all batteries, cables, and connectors are in good condition, though testing before a shoot is recommended.
- Voltage converters designed to step up from 12 to 24 volts can struggle during camera startup due to high amperage surges, even if rated for continuous high-amp loads.
- The amperage requirement doubles through the source battery when using a voltage converter, so a 15-amp surge at the camera requires approximately 30 amps from the 12-volt battery.
- Converting a 12-volt rig to native 24 or 28 volts is preferable for modern film cameras, with a separate step-down converter available for older equipment and video work.
- The ARRI 435 can be configured on some models to ramp up to speed more slowly, which reduces amperage spikes during startup.
Hängt ab von
- This discussion focuses specifically on the ARRI 435 and may not apply equally to other camera models.
- Battery performance is affected by age, condition, temperature, and specific rig configuration.
- The technical specifications mentioned are based on reports from battery manufacturer representatives but were not independently verified in all scenarios discussed.
- Recommendations vary based on individual rig design and component compatibility.
- One participant achieved 90 fps with a mixed battery combination but noted that different sled designs react differently to the same battery setup.