Iskra AT5-1

Tomorrow’s technology, today

Efficiency (the ability to turn the free energy in the wind into usable electricity) is the key to performance and cost effectiveness.  At Iskra, efficiency is an obsession…

• Our patented Reactive Pitch technology allows the high efficiency aerofoil blades to be angled to capture the maximum energy from low to moderate wind speeds, which are the most prevalent.
• With a ‘cut-in’ wind speed of only 2.5m/s, the AT5-1 has unparalleled efficiency where you need it most.
• At higher wind speeds (and up to 60m/s or 134mph), the blades pitch automatically to maintain a steady 5kW whilst controlling the rotor speed to a modest 220rpm.
• Unlike other turbines which use ‘coning’ or ‘furling’ to control power, the AT5-1 does not compromise on low wind speed efficiency to achieve high wind speed performance.
• Iskra’s patented generator technology has an unrivalled 95% efficiency in converting the rotor’s power into electricity at low wind speeds.
  
  Which means more useful free energy for you.

Reliability.  Lowering the cost of ownership.

• The Iskra AT5-1 is inherently more reliable, by design.  We believe the key to reliability is simplicity.
• There’s no gearbox (they generate noise, reduce efficiency and require maintenance).
• There are no complex systems to regulate speed - Reactive Pitch allows the turbine to regulate its speed whatever happens: grid or connection failures, battery charging issues and so on, with no need for additional complexity such as ‘dump’ loads, additional braking systems or switching the turbine off in high winds.
• There are very few moving parts - even the main shaft is stationary, with the generator integrated into the rotor assembly.  In fact, the Reactive Pitch system contains the only moving parts, apart from the rotor itself.
• There’s no mechanical brake, eliminating the usual issues with such devices.  Instead, there’s an automatic integrated electro-dynamic brake which uses the generator to safely stop the machine whatever the wind speed.  There are no moving parts there either.  As you might expect, its patented too.

Durability.  Engineered to last, so your investment is secure.

The Iskra AT5-1 is designed to last 20 years or more, and is built from high specification materials which provide durable strength and solid corrosion protection.

• All parts are made from composite, stainless steel, or coated to automotive standards against corrosion.
• The composite blades have a special coating which protects against Ultra-violet radiation and airborne dust erosion (the blade tips travel at more than 100mph!).  Just to be sure, we test the erosion resistance of our blades to double military standards.
• Our first 150 turbines have more than 2 million hours of operation, with an average operating time greater than 99%.

Iskra AT5-I Data

• Rated Output:  5kW
• Rotor Speed:   200rpm nominal (variable)
• Cut-in Wind Speed:  2.5 m/s (5.6 mph)
• Survival Wind Speed:  60 m/s (134 mph)
• Rotor Diameter:  5.4m (17.7 feet)
  
• Number of Blades:  3
• Blade Material:  Glass Fiber Reinforced Composite, low reflection, UV and anti-erosion coatings
• Control System:  Patented Reactive Pitch Control and passive blade pitching - no additional control systems required
  
• Gearbox:  None required.  See generator
  
• Brakes:  Electro-dynamic
• Generator:  Patented brushless direct drive air-cored high efficiency Permanent Magnet Alternator
• Yaw Control:  Passive - Tail Vane and rotor
  
• Tower Height:  9m, 12m, & 15m
• Tower Types:  Free-standing (monopole) or guyed

Iskra AT5-I Data Sheet

Iskra Power Curve Data