Introducing the SANUPS A11M of SANYO DENKI: Reliable UPS With Parallel Redundancy

Introducing A11M Parallel Redundant UPS

Uninterruptible Power Supplies (UPS) play a vital role in ensuring critical operations continue during power disruptions. With the rise of advanced yet compact equipment, the need for reliable UPS systems in the lower kVA range has grown. We introduce the SANUPS A11M, now certified with UL – a UPS unit that combines reliability with our original parallel redundancy approach, combined with autonomous control, instilling unparalleled confidence in power solutions. 

Enhanced Reliability through Parallel Redundancy

Diagram of parallel redundancy system

Significantly boosting reliability, we adopt a parallel redundant configuration, guaranteeing continuous power even in case of a parallel-connected UPS unit’s malfunction.

Central to this enhancement is the parallel redundant operation system. Crafted to uphold a steady power supply, this strong architecture, illustrated above, embodies parallel redundancy, effortlessly uniting each UPS for efficient power distribution.

How Does Autonomous Control in Parallel Redundant Works?

Parallel Redundant Operation

In parallel-connected inverter systems, it’s crucial to maintain consistent voltage, frequency, and phase among units to prevent disruptive “cross-currents.”

Different methods, like the central control and master/slave approaches, have been used for parallel inverter connections. However, these methods, while suitable for capacity expansion, often lack high reliability.

The SANUPS A11M takes a fresh approach by omitting central control units. Instead, it employs autonomous control circuits for individual units, allowing each unit to independently manage parallel inverter operation. This autonomous control includes monitoring input and output voltages, calculating momentary frequency and phase, and making necessary adjustments.

Communication lines link the units, enabling start/stop commands and data sharing. Importantly, synchronization happens within each unit, reducing dependence on inter-unit communication. This ensures consistent parallel operation during both AC and backup scenarios.

For example, with 8 parallel units, they can collectively handle up to 8 kVA loads. If the load is 7 kVA or lower, one unit’s surplus capacity ensures redundancy, maintaining operation even if one unit malfunctions. This innovative design highlights how the SANUPS A11M achieves robust redundancy via parallel operation control while minimizing reliance on shared components.

A11M UPS Features and Benefits

• Parallel Redundancy: The SANUPS A11M supports up to 8 parallel units, ensuring continuous operation despite unit failures.

• High reliability and scalability for lower kVA needs.

• Long Life by Wide Input Range: Designed for regions with unstable power, its extended input range minimizes battery use, extending UPS life.

• Enhanced Load Handling: With a 0.8 rated output power factor, the A11M efficiently handles varying load demands.

• Self-Battery Management: Built-in tests and management functions guarantee reliable backup power.

• User-friendly Battery Replacement: A front battery tray design streamlines replacements.

• Compact Design: The reduced size and weight enhance adaptability across setups.

In Conclusion

The SANUPS A11M represents a significant advancement in UPS technology, bringing parallel redundancy and enhanced reliability to lower kVA applications. Autonomous control, broad input ranges, and advanced interfaces make it a seamless platform for demanding conditions. The SANUPS A11M is a powerful and reliable UPS that is ready to meet the needs of businesses and critical systems in challenging scenarios.