8000 DC Alternator

8000 Series Alternators Exceeding Military Standards without the Cost Polar Power Inc developed its 8000 series of all permanent magnet alternators specically for battery charging applications in:

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Hybrid Electric Propulsion Hybrid Photovoltaic Solar Communications Uninterruptible Power Systems Wind Energy Hydroelectric

Advantages:

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High reliability and Limited Maintenance High degree of corrosion resistance No Mechanical Adjustments Very Light Weight High Quality Electrical Output Stiff voltage regulation to current demand Up to 94% Efciency

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High and Low Ambient Operation (-80° to 160° F)

Design Performance:

• Available in Voltages of 12 to 500 Vdc • 32 pole high frequency design provides low electrical ripple • Higher frequency design provides compact and lightweight performance • Direct engine mounting further enhances the compact and lightweight design • Conventional 3 phase stator lowers assembly cost • NdFeB Magnets for high efciency • Class H magnetic wire for long and reliable service life • Anodized type III process for aluminum parts • Nickel Plating for steel parts • Stator is vacuum impregnated

22520 Aval Avalon on Blvd • Carson, CA 90745 USA • Te Tell (310) 830-9153 • Fax (310) 830-9825 • www.polarpowerinc.com

8000 Series Alternators Low Maintenance and High Reliability

1. Polar Power’s 100% permanent magnet alternator has no bearings, couplings, brushes, slip rings,or rotating elds so there are no alternator parts to wear out. 2. Our unique alternator design (large diameter / 32 poles) allows you to run your engines at lower speed for the same output, extending engine life. 3. Each Polar Power stator lamination stack is fully bonded to create a stator without voids which prevents moisture penetration, corrosion, and swelling. After the copper winding is in place, the entire stator assembly is vacuum dipped and a class H coating is baked on. This seals the metal surfaces from corrosion and improves thermal performance. This also increases resistance to salt fog. The coatings also protect the stator from particle abrasion and vibration.

9. Polar Power’s PMHH alternator should have an MTBF exceeding 100,000 hours as there are no parts which rub, wear, or overheat under normal operating conditions. Available Controller Features:

The model 8000 series alternator requires the voltage regulator to change the engine speed in response to changing loads (current) to maintain a regulated voltage. The voltage regulator provides thermal protection for the alternator; a sensor on the yoke can alert the operator of a high temperature condition. If no action is taken, the regulator automatically reduces the output current so the alternator can run cooler.

4. The steel magnet ring is 100% Nickel plated. The magnets are then bonded to the inside the ring with high temperature aerospace grade epoxy. The purpose of Nickel plating the ring is to provide a surface with high degree of corrosion resistance thereby preventing corrosion from starting in one area, migrating under the magnets and creating a bond failure. The assembled magnet ring is then epoxy painted to further seal the surfaces and provide a higher degree of salt fog corrosion resistance. 5. The magnets are mounted on the inside of the ring so there are no centrifugal forces pulling against the epoxy bonds. 6. There are no electronic parts (diodes, etc.) or electrical connections inside the alternator. There is nothing to short or vibrate loose inside the alternator. 7. The alternator is almost impossible to damage electrically. The outputs can be shorted for minutes without damage. 8. The alternator’s rotor is mated to the engine’s ywheel and this mated pair is dynamically bal anced to improve the engine’s bearing life.

22520 Avalon Blvd • Carson, CA 90745 USA • Tel (310) 830-9153 • Fax (310) 830-9825 • www.polarpowerinc.com

8000 Series Alternators The voltage regulator through a current transducer monitors the output current of the alternator. The voltage regulator lowers the engine speed during an over current condition. This feature prevents the alternator from over heating or stalling the engine. For long reliable life, the Diode Bridge is remote from the alternator and mounted on a large heat sink to keep cool and free of engine vibration. The voltage regulator also monitors the diode bridge for an over temperature condition.

Low Fuel Consumption for the selected engine

The PMHH alternator has an efciency of be tween 85 to 94% versus 45 to 70% typical of most other DC alternators. Low Acoustic Noise

The voltage regulator maintains the voltage drift too less than 1.5% during a change in ambient temperatures of 60° F over 8 hours. Voltage regulation from no load to full load is less than 200ms. There is an optional load dump feature for the voltage regulator to limit the voltage rise transient after a sudden change from full load to no load. This optional feature is rarely used. Very High Quality Electrical Output

Low EMI emissions are designed into the system. There are no brushes or slip rings. Field coil is isolated from the buss through fast diodes and ca pacitance. The voltage regulator does not strobe the eld coil on and off. Proportional control reduces the back EMF produced by the eld coil. 1. The 32-pole design reduces the amplitude of the voltage and current waveforms. 2. The relatively large iron and copper mass in conjunction with a fast responding voltage regulator reduces the load transient response time to under 200 milliseconds from no load to full load and vise-versa. Light Weight

Model 8000 series alternators incorporate an aluminum yoke. Additional reductions in weight can be attributed to the 32 pole design, high-energy Neodymium-Iron-Boron magnets and the “pancake” design of the assembly.

Model Number

Power Range

Width

Weight

8080

2-10 KW

2.8 in 7.15 cm

45 lb 20.5 kg

8220

10-22 KW

3.915 in 9.95 cm

55 lb 25 kg

8340

15-34 KW

4.46 in 11.35 cm

74 lb 33.5 kg

Maximum power is rated at 3600 RPM Weights are approximate and do n ot include controls and Diodes Fluid colling adds 3.5 lb (1.6 kg)


8000 Series Alternators Conguration: _____ ____ __________ . ______ Style 808 822 834

Cooling 1 = Air cooled only 2 = Water cooled only

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Voltage

Speed

±35% range

±200 RPM

A = 12

A = 800

B = 24

B = 1200

C = 36

C = 1600

3=Water and air D = 48 cooled

D = 2000

E = 72

E = 2400

F = 96

F = 2800

G = 120

G = 3200

H = 144

K = 3600

I = 240 J = 320 K = 500

Limited Warranty: Polar Power Inc. hereby warrants goods manufactured and sold by it to be free from defects in materials and workmanship for 24 months after date of delivery. The Warranty is limited to repair or replacement at 22520 Avalon Blvd. Carson, Ca 90745 or at Repair Center designed by Polar Power Inc. For details please contact Polar Power Inc.


8000 DC Alternator

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