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Variable intensity electromagnets generator

One of the significant issues related to performance of hydroelectric and a wind turbine is the efficiency of energy conversion. A control system monitors rotor speed and changes the electro-magnet intensity according to actual rotor speed.

One of the most significant issues related to the performance of both hydroelectric and wind turbines is the efficiency of the energy conversion mechanism. The principle of operation of these turbines involves the rotation of the wind/hydroelectric turbine’s blades which are connected to an electricity generator. The proposed program aims to develop a solution to deal with all issues mentioned in the state of the art section. DESCRIPTION OF WORK PLANNED: 1. Development of the multi poles, 50kW generator, which will operate in direct drive mode with the hydroelectric turbine. The variable intensity electro-magnet control hardware and software will be incorporated. 2. Incorporate the variable intensity electro-magnet generator and control system in a 20 and 50 kW in-pipe low head hydroelectric turbine and on a 300 Kw wind turbine. 3. Bench test the systems, under variable flow conditions. 4. Calculate and evaluate efficiency. 5. Upgrade and debug software and hardware, according to bench tests. The expected result is two generators, one of 50kW and the second 300 kW generator, both optimized with multi poles and variable intensity electromagnets, operating at low speed- thus can be a direct (no gearbox) drive generator, allowing high efficiency of conversion at various water flows and wind intensities. System operation mode: The VRS monitors the generator's rotation speed [and hence generator shaft RPMs] and changes the electro-magnetic field intensity according to actual rotor speed & to a predefined Voltage Regulation algorithm. The system is consisted of 2 stages: A Digital Stage: That measures the Generator's rotation speed, either via a rotary shaft encoder or by measuring the generator's output voltage's frequency. This stage transform the speed signal into a digital output that is proportional to the generator's excitation, based on VWS's novel Voltage Regulation Algorithm. An Analogue Stage: The digital signal is than being fed into an D/A converter that converts it into a DC voltage which is amplified & supplied to the Generator's rectifier.
Acronym: 
Natural+
Project ID: 
7 172
Start date: 
01-11-2011
Project Duration: 
24months
Project costs: 
2 150 000.00€
Technological Area: 
Generators, electric engines and power converters
Market Area: 
Wind energy

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