AIR 30 Owner’s Manual
23
Regulation:
As AIR wind turbine produces power and the battery volt-
age rises to the regulation set point voltage, AIR wind turbine will go into
“regulation.” At that point it stops producing power and the blade rpm will
lower dramatically (almost stopping). AIR wind turbine will remain in regu-
lation until the battery voltage drops slightly below the regulation set point
– this is often referred to as the
cut-in voltage
. When the cut-in voltage
is reached, the blades will resume spinning in response to the available
wind. Regulation mode is indicated by the AIR wind turbine LED blinking
at a rate of approximately once a second.
Over Speed Protection:
In gusty or continually high winds, over 32 mph
(14 m/s), the AIR wind turbine will enter a protection mode where the
blades come to a near stop. The turbine keeps the blades stopped for 2
minutes and then allows the blades to begin spinning. If the AIR wind tur-
bine senses high or gusty wind speeds are still present, it will repeat the
cycle until the wind speeds drop below 32 mph (14 m/s).
Over speed protection is stressful on the AIR wind turbine. Southwest
Windpower recommends taking measures to protect your wind turbine in
excessively high wind situations. The AIR wind turbine’s LED will blink
quickly – approximately 10 times per second when in over speed protection.
Braking Mode:
AIR wind turbine may be placed in braking mode by
directly shorting the turbine positive and negative wires together or by the
use of a stop switch. The stop switch first disconnects the turbine from
the battery and then shorts the positive and negative wires. In very strong
winds the blades may rotate slowly even with the switch activated.
No Load Operation /Open Circuit /Free Spinning:
AIR wind turbine will
spin freely if disconnected from an electrical load. This results in a cycle of
rapid blade speed followed by rapid braking – this mode of operation may
accelerate wear of the turbine and is also non-productive. To turn AIR wind
turbine off for short periods of time Southwest Windpower recommends
using a properly installed switch. If your AIR wind turbine will be shut down
for an extended period of time Southwest Windpower recommends lowering
the turbine completely or securing the blades to prevent rotation.
Seven - AIR Wind Turbine Operation
7-1 Operational Summary
Wind turbines operate by capturing the kinetic energy of moving air:
the
wind
. They convert it to rotational motion to turn an alternator that produc-
es electrical power. The electrical power must be regulated to a voltage to
charge the system batteries, and there must be a system to prevent over-
charging the batteries and resume charging as the battery voltage drops.
A means to protect the wind turbine from extreme wind damage must also
be provided.
The AIR wind turbine accomplishes all these goals by incorporating a
three-phase brushless permanent magnet alternator and microproces-
sor controlled electronics to optimize its power production capability. The
microprocessor continuously adjusts the loading of the alternator to keep
the turbine operating efficiently in most wind regimes. The result:
•highpowerproduction;
•highbladeefficiency;and
•lowerbladenoise.
7-2 Operating Modes
Charging:
When the AIR wind turbine is connected to the batteries with
the voltage below the set point the blades spin in response to the wind.
The blades continue to spin unless the batteries are fully charged or the
wind is excessively high. The AIR wind turbine features dynamic software
allowing it to generate energy up to 35 mph (14 m/s); however, under
these conditions the turbine blades will drop in speed to control heat
buildup.
Note that AIR wind turbine requires a minimum battery bank voltage
(approximately 10.5 volts on a 12-volt system) or the controller will
behave as if an open circuit condition exists. Refer to
Open Circuit/Free
Spinning
section. When charging the batteries, the AIR wind turbine LED
will be continuously illuminated.
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