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The
new electronics are a considerable improvement over the AIR 403
controller that consists of diode-rectification and a simple off/off
voltage switch.
Much
Lower Noise: Previous AIR wind modules relied on their
aero-elastic blade design for protection in high winds, causing loud
flutter noise in winds above 35 mph (16 m/s). AIR-X’s circuit
monitors the wind speed and electronically slows the blades as it
reaches its rated output preventing it from going into flutter. This
results in a much quieter wind turbine. In high winds, the AIR-X will
continue to produce power at a reduced level until the wind decreases,
at which point maximum output will resume. The Benefit:
Quieter and neighbor friendly operation.
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Improved
battery charging:
Previous AIR designs required 300-400 amp hour battery banks so the
trickle charge
of the wind turbine could be adequately absorbed. The AIR-X’s charge
controller periodically stops charging, reads the battery voltage, compares
it to the voltage setting and if the battery is charged, it completely
shuts off all current going to the battery. This function is performed
within a few milliseconds. The closer the battery is to reaching its
full state of charge, the more often the AIR-X’s circuit repeats
this action. This means any size battery bank from 25 to 25,000 amp
hours or higher can be charged safely. When the battery has
reached its charged state, the AIR-X will slow to an almost complete
stop. Only when the battery has dropped below its voltage set point
will it startup and resume charging. The Benefit: Extended battery
life, no overcharging.
Lower
stress design: AIR-X limits power on the input side of the
electronics by controlling the torque from the blades. The power no
longer has to be dissipated by the electronics resulting in lower
stress on the circuit, bearings and other materials. Furthermore,
stress on wind turbines occurs primarily in high winds. Under these
conditions, the electronic stall design reduces the blade speed to 600
rpm, thereby significantly reducing turbine and tower loading while
still producing power. The Benefit: Greater confidence in
turbine operation in high wind conditions without manually operating
the stop switch. Note: A manual stop switch control is an
available option for the AIR-X.
Design
changes are primarily found within the body of the turbine:
- New
microprocessor-based controller.
- New
"wave washer" combined with looser bearing-to-body
tolerances are incorporated into the face bearing set. This
results in lower compression on the bearing/race, with quieter
running and lower
startup speed. It also lowers stress on the bearings and
shaft when subject to twisting forces during normal operation.
- New
series of carbon reinforced blades.
- More
robust tower clamp and yaw assembly for stronger and more secure
tower mounting.
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