Polar has developed a DC generator system that meets requirements for increased reliability, reduced maintenance, and fuel efficiency.

Polar’s generator solution is a complete system consisting of a brushless DC alternator, a gas or diesel engine, filters to separate sand, rain, snow and insects from incoming air, microprocessor control, modem interface for remote control and reporting, and a sound attenuated enclosure.

COST EFFECTIVE:

• Up to 80% savings in fuel.
• Polar’s DC alternator is 15-20% more efficient than competing generators, allowing smaller engines and less fuel.
• Polar’s DC generator is variable speed, saving 20-40% in fuel.
• DC design saves in conversion losses from AC to DC
• Very low system maintenance.

RELIABLE:

• Directly connects to battery bank eliminating the transfer switch.
• DC output backs up rectifiers and battery chargers.
• At lower electrical loads-engine reduces speed for longer life.
• Polar’s DC alternator has no brushes, slip rings, bearings, excitors or rotating electrical elements. Precise voltage regulation is made across a wide speed range; electronic governors are not required on the engine.

APPLICATIONS:

• Utility Backup
• In prime power applications Polar’s DC generator, coupled with a battery bank, offer a continuous, uninterruptible power supply. The DC generator operates (for example) 4-6 hours a day charging the battery. The battery then provides 24 hour power.

AIR CONDITIONING:

To meet site cooling requirements, Polar has developed:

• Airgen System--Provides a co-generation of air conditioning and DC power. One engine drives both the refrigeration compressor and the DC alternator.
• DC Powered Air Conditioner--Variable capacity using high efficiency brushless DC motors.
• Ambient Air Cooling--Consists of a two-stage low maintenance air filter, a variable speed brushless DC blower, and a temperature control. This is the most cost effective means of site cooling where clean ambient air is used to cool equipment.

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Shown here, 48 Vdc 120 amp Alternator powered by the Kohler Command 18 Engine, Propane fueled.

Shown here is the 24 Vdc 220 amp Alternator, powered by the Lister Petter LPA2 Air-Cooled Diesel Engine.

Shown here is Polar’s DC Alternator, disassembled, exposing Rotor, Stator, Control Electronics, and Diode Bridge. Note the simplicity.

Our newest 3KW DC Alternator, mounted on a Yanmar L70 Diesel Engine - a very compact and economical model.

Polar’s Airgen System, providing 6KW of DC Power, and 3 tons of Air Conditioning.