The Biro Air turbine has two sets of closely spaced contra-rotating blades. This arrangement of blades is used in aircraft and marine propulsion systems and is known to provide efficiency improvements. Through extensive research and development efforts, Biro Air Energy has now applied this contra-rotating blade technology to small scale wind energy production.

biroair blades

Small wind turbines are typically equipped with an alternator for power generation. An alternator has two main components: a stator and a rotor. Movement of the rotor relative to the stator is what causes power to be generated by the alternator. In previous wind turbines, the stator is fixed and the rotor is connected to the blades; power is generated as the blades turn the rotor. In the Biro Air wind turbine, one set of blades is connected to the rotor portion of the alternator, while the other set simultaneously rotates the stator in the opposite direction. This results in double the relative movement between rotor and stator for a given wind speed, providing higher power output as compared with conventional systems. This arrangement also eliminates the need for a complex mechanical drivetrain, which improves the lifetime and durability of the turbine.

The blades themselves are injection molded from a carbon fibre composite material using a seamless design that is proprietary to Biro Air Energy. The strength and performance of our blades is second to none in the industry.

Nose Cone

The unique front nose cone design allows the turbine to effortlessly follow the wind, without the need for a tail. This makes the turbine more compact and also increases power output by directing the wind towards the ends of the blades, where power and performance are greater. An added bonus is that, in excessively high winds, the nose cone can actually slow down the turbine by deflecting the wind past the tips of the blades, slowing the turbine down and reducing the risk of damage due to over-speed.

Power Coupling

Power Coupling

Biro Air has designed the turbine with a rotational power coupling for transmitting power down its mounting pole. The power coupling permits complete 360° movement of the turbine, freeing it to follow any change in wind direction, without interference from wires wrapping around the pole. This means more power generation and less maintenance over the lifetime of the turbine.

Inverter and Wind Interface

Biro Air Aurora Inverter

All Biro Air wind turbines are designed to operate in a grid-tied environment. This means that no expensive battery packs are required for operation and that power can be returned to the local utility on a net-metering basis. Each turbine installation is equipped with an inverter for ensuring a voltage and frequency output that match local requirements. The inverters are certified to meet or exceed UL 1741 safety standards for grid-tied operation.

The wind interface is a microprocessor controlled load regulator that modulates the electrical demand on the turbine according to the available wind conditions. This ensures that the turbine is generating the maximum available power at all times and prevents the turbine from stalling out or over-speeding due to improper load control.