减速机电动滚筒振动源电动机新型产品规划与开发.docx

1、减速机电动滚筒振动源电动机新型产品规划与开发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 hav

2、e 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 areas through reduction of power electronic and control costs; to integrate the dr

3、ive 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

4、 electrical machines are driven by variable-speed drives. These are a less mature product than electrical machines and should 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-s

5、peed 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 mot

6、or and drive efficiency 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

7、. 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 scientific advances 4.2.1. Electrical machines4.2.2. Power electronics and cont

8、rol4.2.3. Integrated systems5. ConclusionsReferencesDesign and implementation of a novel hybrid-electric-motorcycle transmissionApplied EnergyThis hybrid power system incorporates a mechanical type rubber V-belt, continuously-variable transmission (CVT) and chain drives to combine power of the two p

9、ower sources, a gasoline engine and an electric motor. The system uses four different modes in order to maximize the performance and reduce emissions: electric-motor mode; engine mode; engine/charging mode; and power mode. The main advantages of this new transmission include the use of only one elec

10、tric motor/generator and the shift of the operating mode accomplished by the mechanical-type clutches for easy control and low cost. Kinematic analyses and design are achieved to obtain the size of each component of this system. A design example is fabricated and tested.Article Outline1. Introductio

11、n2. Parallel hybrid transmission3. Kinematic analysis and design 3.1. Speed ratio of the chain drive and final drive3.2. Speed ratio of the CVT3.3. The speed ratio of the hybrid-power system4. Design examples 4.1. Prototype development4.2. Test and experimental results5. ConclusionsAcknowledgementsR

12、eferencesA novel power splitting drive train for variable speed wind power generatorsRenewable EnergyIn this paper a novel electrically controlled power splitting drive train for variable speed wind turbines is presented. A variable speed wind turbine has many advantages, mainly it can increase the

13、power yield from the wind, alleviate the load peak in the electrical-mechanical drive train, and posses a long life time, also, it can offer the possibility to store the briefly timely wind-conditioned power fluctuations in the wind rotor, in which the rotary masses are used as storages of kinetic e

14、nergy, consequently, the variable speed wind turbines are utilized in the wind power industry widely. In this work, on the basis of a planetary transmission a new kind of drive train for the variable speed wind turbines is proposed. The new drive train consists of wind rotor, three-shafted planetary

15、 gear set, generator and servo motor. The wind rotor is coupled with the planet carrier of the planetary transmission, the generator is connected with the ring gear through an adjustment gear pair, and the servo motor is fixed to the sun gear. By controlling the electromagnetic torque or speed of th

16、e servo motor, the variable speed operation of the wind rotor and the constant speed operation of the generator are realized, therefore, the generator can be coupled with the grid directly. At the nominal operation point, about 80% of the rotor power flow through the generator directly and 20% throu

17、gh the servo motor and a small power electronics system into the grid. As a result, the disadvantages in the traditional wind turbines, e.g. high price of power electronics system, much power loss, strong reaction from the grid and large crash load in the drive train will be avoided.Article Outline1

18、. Introduction2. Configuration of the novel variable speed drive train3. Variable speed operation4. Power splitting performance5. Transmission efficiency6. Operation range7. ConclusionReferencesFrom transmission error measurement to pulleybelt slip determination in serpentine belt drives: Influence

19、of tensioner and belt characteristicsMechanism and Machine TheorySerpentine belt drives are often used in front end accessory drive of automotive engine. The accessories resistant torques are getting higher within new technological innovations as stater-alternator, and belt transmissions are always

20、asked for higher capacity. Two kind of tensioners are used to maintain minimum tension that insure power transmission and minimize slip: dry friction or hydraulic tensioners. An experimental device and a specific transmission error measurement method have been used to evaluate the performances of a

21、generic transmission by determining the pulleybelt slip for these two kinds of tensioner. Transmission error between pulleys, pulley/belt slip are deduced from pulley rotation angle measurements. Results obtained show that: the use of tensioner limits belt slip on pulleys, pulleybelt slip is reachab

22、le from transmission error measurement, belt non uniform characteristics are responsible of low frequency modulations of transmission error.Article Outline1. Introduction2. Experimental set up 2.1. Belt drive description2.2. Measurement devices3. Pulleybelt slip analysis 3.1. From transmission error

23、 to slip rate3.2. Results3.3. Transmission error related to non uniform belt characteristics4. ConclusionReferencesA compact, high efficiency contra-rotating generator suitable for wind turbines in the urban environmentRenewable EnergyThis paper is concerned with the design, development and performa

24、nce testing of a permanent magnet (PM) generator for wind turbine applications in urban areas. The radially interacting armature windings and magnet array are carried on direct drive, contra-rotating rotors, resulting in a high torque density and efficiency. This topology also provides improved phys

25、ical and mechanical characteristics such as compactness, low starting torque, elimination of gearboxes, low maintenance, low noise and vibration, and the potential for modular construction. The design brief required a 50kW continuous rated prototype generator, with a relative speed at the air-gap of

26、 500rpm. A test rig has been instrumented to give measurements of the mechanical input (torque and speed) and electrical output (voltage, current and power) of the generator, as well as temperature readings from inside the generator using a wireless telemetry device. Peak power output was found to b

27、e 48kW at a contra-rotating speed of 500rpm, close to the design target, with an efficiency of 94%. It is anticipated that the generator will find application in a wide range of wind turbine designs suited to the urban environment, e.g. types sited on the top of buildings, as there is growing intere

28、st in providing quiet, low cost, clean electricity at point of use.Article Outline1. Introduction2. Design and manufacture considerations3. Test facility construction4. Generator performance results5. ConclusionsReferences电动滚筒电机和减速器新型驱动装置固定式和移动式带式输送机结构紧凑、传动效率高、噪声低、使用寿命长，运转平稳、工作可靠、密封性好、占据空间小、安装方便、维护简

29、单恶劣环境条件潮湿、泥泞、粉尘、高温工作环境皮带运输机和提升设备动力矿山、冶金、化工、煤炭、建材、电力、粮食及交通运输Electric drum Motor and reducer New Drive Fixed and mobile Belt Conveyor Compact, high transmission efficiency, low noise, long life, smooth operation, reliable sealing, small footprint, easy installation, simple maintenance Adverse environm

30、ental conditions Wet, muddy, dust, high temperature Work environment Belt conveyor and lifting equipment Power Mining, metallurgical, chemical, coal, building materials, electricity, food and transport1,440 articles found for: pub-date 1989 and tak(Electric drum ) or Drive or (Motor and reducer ) or

31、 (Belt conveyor ) or ( lifting equipment ) or (Work environment ) and (New or (Fixed and mobile ) or Compact or (high transmission efficiency) or (low noise) or (long life) or (smooth operation) or (reliable sealing) or (small footprint) or (easy installation ) or (simple maintenance ) and (Adverse

32、environmental conditions ) or Wet or muddy or dust or (high temperature ) or Power or Mining or metallurgical or chemical or coal or (building materials) or electricity or food or transport )Designing Dryers Using Heat and Mass Exchange Networks: An Application to Conveyor Belt DryersChemical Engineering Research and DesignClassical 1-D numerical simulations of dryers involve the solution of non linear differential relations which include bal