Transdev’s 300mph motor
June 22nd 2006 e=motion, the rocket-like battery-powered car gunning for the British land speed record for electric cars on 7 July, is hoping to hit 300mph with help from mechanical power transmisission specialist, Transdev. The company provides the car’s main belt drive and motor coupling system using Breco and Synchrofelx ATP10 GEN III belts and precision ATP pulleys.
At over 10 m in length, e=motion has a cross section of around 762 mm x 610 mm which provides a very tight space for the driver, fifty two on-board 12 VDC batteries and two, through-ventilated 6000 rpm AC motors controlled by variable speed drives. Transdev needed to be completely sure that the belt drive system would transfer over 500 BHP with total reliability and chose 75 mm wide ATP10 GEN III belts for the job.
The rear-axle driven speed-monster has a theoretical road speed of over 300 mph and an acceleration performance which outstrips a Formula 1 racing car. With the single belt and five pulley drive system providing the complete power transfer from motor shaft to rear axle, the extreme forces and dynamic loading endured is a severe testing for these components; the choice of ATP 15 GEN III belts and pulleys reflect the quality and durability of the product.
Breco & Synchroflex GEN III timing belts combine closer wound high tensile steel tension members with a new, polymer loaded, polyurethane for neutral belt tracking and reduced friction on flangeless pulleys. Improved distribution of peripheral forces, with up to 30% additional tooth meshing, results in a 25% improvement in torque transmission over standard AT and ATP versions. Other benefits include longer life, reduced noise and maintenance free operation.
The range is available in 7 standard belt widths from 16 mm to 150 mm, with other special widths to order, and in standard lengths up to 5000 mm. AT3, AT5, AT10 and ATP10 pitch variants are available in a wide range of configurations including single or double sided, reinforced belt backings, anti-static, coloured, machine ground and punched versions. More articles from Transmission Developments Co (GB) Ltd: | 
