The development of 5kW off-grid wind generator set
Chen Li Wang Yeping
China Aerodynamics Research & Development Center
China Aerodynamics Research & Development Center has cooperated with
Hunan Dongdi Science and Technology Development Company in the development
of a new-style 5kW off-grid wind generator set. This product has such specialties as
follows:
 The main performance parameters: startup wind speed 3m/s, rated wind
speed 9m/s, rated rev 200rpm, Cp>0.4, efficiency coefficient of generator
η=0.82, rated output power pe=5~5.5kW.
 A special mechanism can adjust pitching angles of blades to ensure the set
starting at low wind speed and being protected at high wind speed.
 A special type of contactless self-excitation high performance generator has
been developed and patented. The main configuration and testing results
will be presented in the paper. It has such advantages as follows:
1. It exceeds other generators of same power, same rev, and same
type in efficiency by 5%~10%.
2. Its rated efficient power is 0.82. And the efficiency is higher than 0.8
with the rev ranging between 0.5~1.5 times rated rev.
3. It matches the power of impeller well. The load power is in direct
proportion to 2.6~2.8 power of rotated speed of impeller.
4. It has great overload capacity. In the condition of load exceeding full
by 50%, it works 4 hours normally.
5. Its startup resistance moment is very low.
Brief introduction of authors：
Chen Li, was born in July, 1972, was graduated from the Aerodynamic Specialty
of Nanjing University of Aeronautics and Astronautics, is an engineer of the Chinese
Aerodynamic Research & Development Center. He engages the study of wind
engineering and industry aerodynamics, including the design, manufacture and
measurement of wind energy machines.
Wang Yeping, was born in June, 1931, was graduated from Northern Jiaotong
University, is a member of
National Wind Energy Machine Standardization
Technology Committee, head of Special Contactless Electric Machine Institute of CES,
president of WESE Technical Center of Hunan Province. He chronically engages the
study and development of new energy, especially the study of high efficiency
generator and electric & electronic control system, participates in research tasks of
China national items tackling key problems of science and technology and China
national program of high technical study and development.
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