风机控制策略

Table 1. The top 10 assignees of wind motors in DII database.
Assignee
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Patent Number 211 211 141 93
Country Main Business
General Electric Co Mitsubishi Wobben A Vestas Wind Systems
1. Introduction (4)
Wind Energy is an important new energy for China. Analysis on the technical competitive strategy of the main competitors in wind power has important theoretical and practical significance for Chinese stakeholders.
3. TECHNICAL COMPETITIVE STRATEGIES (4)
3.2 To promote the technical competitive ambition by Patent strategy The top assignees in Chinese patent database and in DII databases are almost same. The Germany wind motor patents applied in Chinese are mainly owned by Wobben. A (75) and Siemens Company. 59 United states' wind motor patents applied in China are owned by General Electric Company (GE).
3. TECHNICAL COMPETITIVE STRATEGIES (6)
Considering the counterintelligence, the wind power companies used some patent tactic: Using the different assignee names would confuse the competitors in patent collection and analyzing. In DII, wind motors patents of Mitsubishi Company applied by Mitsubishi Jukogyo KK(167),Mitsubishi Electric Corp(26), Mitsubishi Heavy Ind Ltd (18), Mitsubishi Denki KK(6). Patents of wind motors company Enercon is 0, since all patents' assignee and inventor are Wobben A.
3. TECHNICAL COMPETITIVE STRATEGIES (5) Denmark Vestas Wind System, the largest wind electricity generator manufacturer in the world, owns 41 patents in China. Japanese wind motors patents applied in China are owned by more than 20 companies, including Mitsubishi heavy Co. (8), Shinko Electric Co.(5), Fuji Heavy Industry Co. (4).
3. TECHNICAL COMPETITIVE STRATEGIES (2)
3.1 To confirm technical competitive strategy based on domestic demand In European countries and Japan, oil, coal and natural gas resource are limited, but the wind power is abundant. They were active to promote wind power utilization in their domestic market in past decade. Then they occupy the international wind power market based on technical predominance eventually.
1. Introduction (1)
shortage of fossil energy climate change caused by CO2 emission →many countries focus on energy and environment problem and make new energy strategy. Wind power is a choice.
3. TECHNICAL COMPETITIVE STRATEGIES (7)
With patents, the companies began to set technical barriers to restrict their competitors. In March 2008, GE filed a complaint with the U.S. International Trade Commission against Mitsubishi Heavy Industries Ltd and said Mitsubishi's wind turbines infringed its patent on wind turbine technology. Meanwhile, GE's patent on variable speed control technology in North American is also a big barrier for Vestas Company who longs for USA market.
Analysis of the Technical Competitive Strategy of main Competitors in the field of Wind Power
DUAN Liping Institute of Scientific and Technical Information of China, Beijing, China, email: duanlp@
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3. TECHNICAL COMPETITIVE STRATEGIES (1)
main wind energy competitors have common characters, mainly in four aspects: Confirm technical competitive strategy based on domestic demand, Promote the technical competitive ambition by Patent strategy, Enhance technical and market competence through mergers and acquisition and Realize technical competitive intention by joint research.
1. Introduction (2)
According to Global Wind Energy council, in 2007 , the global wind energy reached more than 94,000 MW[1]. 27% increase in installed capacity , about 20,000 MW about 25 billion (about $US 37 billion) of investment.
1. Introduction (3)
New energy industries need higher technology and more investment At the primary stage the governmental support and funds are needed. German, Denmark, Japan and Unite State invested a lot in R&D and obtained the technical advantage and market share
Machinery and electric produces Machinery and electric produces Wind Industry Wind Industry Wind Industry Wind rotor blade Machinery and electric produces Fluid transfer machinery Machinery and electric produces Wind Industry
2. METHOD OF ANALYSIS (1) patent analysis method, using Derwent Innovations Index (DII) and Chinese Patent Database Monitoring and digging the information from websites of the government, professional energy association and the competitors Interview with experts
2. METHOD OF ANALYSIS (2)
In International Patent Classification (IPC), code F03D* is wind motors. In May 2008, using IPC code= (F03D*) search in DII database found 12392 Patents.
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REpower Systems 63 AG LM Glasfiber AS 56 Siemens AG Ebara Corp Fuji Heavy Ind Ltd Gamesa Eolica 48 47 47 52
U.S. Japan Ger. Den. Ger. Den. Ger. Jap. Jap. Spa.
3. TECHNICAL COMPETITIVE STRATEGIES (3)
Denmark develops small scale wind power facilities for the domestic small companies based on their agricultural or marine transport demand. At the early stage, German chose to support Aero Industries to develop large-scaled wind turbines. Japanese wind industry's R&D is focus on its special climate and geography, and its wind power facilities are mainly produced by domestic In China, most wind power technology and facilities are imported or produced by joint ventures, so it is important to re-innovate the introduced technology.