Military-Grade 4kW/5kV 3-Phase to Single-Phase AC ChangerJune 03, 2019 by Scott McMahan
SynQor, Inc. announced the MAC-4000, a compact, military-grade 3-phase to single-phase ac changer. It has a shock-proof and weather-proof construction and offers true isolation between the input and output.
The company designed this 4kW/5kVac Phase/Frequency ac changer for the extreme environmental and demanding electrical conditions of military/aerospace applications.
The 1U-sized rack unit weighs 33lbs. The MAC-4000 incorporates the company's field-proven, high-efficiency designs, and rugged packaging technologies. It accepts a 3-phase 440Vrms ac input and converts it to a well-conditioned single-phase ac output using a two-stage isolated dc mid-bus topology.
Options include a selection of output voltage (115Vrms or 230Vrms), output frequency (50Hz, 60Hz or 400Hz) and an electronic circuit breaker on the ac output that allows glitch-free, fault-tolerant parallel operation of up to 32 units in single-phase, 3-phase, and split-phase configurations as well as (N+M) redundancy.
An optional floating output ground optional feature makes it suitable for air or sea crafts MIL-STD-1399-300B compliant applications that might require that feature.
Also, MAC-4000 can be equipped with an Ethernet-SNMP optional module that allows real-time remote system monitoring with trap/email.
In addition to aiding the change of ac output characteristics from an established ac input source, the MAC-4000 tackles the problem of unbalance loads on 3-phase systems in aircraft and ships. The MIL-STD-1399-300B requires the balancing of all phase currents to within ±5% for ships and ±3% for submarines. SynQor contends that achieving this high degree of the phase current balance with today's single-phase electronic loads is now easy its new ac changer.
The 3-phase MAC-4000 lets single-phase loads appear at the power source as clean, well behaved, nearly zero reactance balanced, and MIL STD 1399-300B compliant 3-phase load.
SynQor says the unique MAC-4000 product outperforms other industry solutions in terms of output power, efficiency, reliability, flexibility, low weight, and small size.
- 4,000W (5,000Vac) output power
- Two-stage, isolated dc mid-bus topology
- Balanced load currents for 3-Phase sources; MIL STD 1399-300B
- 3-Phase 360-528 Vrms L-L 3-wire input 50 or 60 Hz
- 115Vrms or 230Vrms ac output at 50Hz, 60Hz, or 400Hz
- Full power operation: -40°C to +55°C
- Up to 32 units can be combined to form a higher power fault-tolerant, glitch-free system, which can also have N+M redundancy
- Battle Mode for over-temperature events
- 1U high rack mount unit (17.00in W x 22.42in D x 1.73in H)
- Low weight: 33 lbs