减速机-电动滚筒-振动源电动机新型产品规划与开发
16页1、Efficiency trends in electric machines and drivesEnergy PolicyAlmost all electricity in the UK is generated by rotating electrical generators, and approximately half of it is used to drive electrical motors. This means that efficiency improvements to electrical machines can have a very large impact on energy consumption. The key challenges to increased efficiency in systems driven by electrical machines lie in three areas: to extend the application of variable-speed electric drives into new area
2、s through reduction of power electronic and control costs; to integrate the drive and the driven load to maximise system efficiency; and to increase the efficiency of the electrical drive itself. In the short to medium term, efficiency gains within electrical machines will result from the development of new materials and construction techniques. Approximately a quarter of new electrical machines are driven by variable-speed drives. These are a less mature product than electrical machines and sho
3、uld see larger efficiency gains over the next 50 years. Advances will occur, with new types of power electronic devices that reduce switching and conduction loss. With variable-speed drives, there is complete freedom to vary the speed of the driven load. Replacing fixed-speed machines with variable-speed drives for a high proportion of industrial loads could mean a 1530% energy saving. This could save the UK 15billionkWh of electricity per year which, when combined with motor and drive efficienc
4、y gains, would amount to a total annual saving of 24billionkWh.Article Outline1. Introduction2. Energy consumption3. Current state of the art 3.1. Generation3.2. Electric motors3.3. Power electronic converters3.4. Variable-speed drives3.5. Complete system 3.5.1. Industrial3.5.2. Household3.5.3. Transport3.6. Market barriers4. Future advances to 2050 and beyond 4.1. Key challenges 4.1.1. Extension of application areas4.1.2. Integrated system design4.1.3. Drive efficiency4.2. Key engineering and s
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