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Dyson Digital Motor V2 will power future technologies
Dyson engineers have developed the fastest, most energy efficient motor for use in home appliances. The new generation Dyson digital motor, DDM V2, has been developed specifically for energy efficient devices. It will see its first application in Dyson’s small, ultra-powerful new handheld vacuum cleaners, DC30 and DC31: compact and lightweight machines with constant, powerful suction. James Dyson: “Bigger motors don’t always equal better performance. Our new digital motor is small, fast, efficient and tough. Its ability to control impeller speed and energy use puts it in a new class of clean motor.” The friction caused by carbon brushes inside conventional brushed motors means they consume more electrical energy, while generating less mechanical energy. Inefficient motors are a drain on the National Grid and battery life of many small appliances. Dyson digital motor V2 is 84% energy efficient – and twice as efficient as the motor in the DC16. It is one of the most advanced vacuum motors, with 15 new patents. It’s fast, light and brushless – giving it improved performance and a longer life. The impeller spins over three times faster than a conventional motor, and ten times faster than the engine of a Boeing 747 aircraft. Designed over the course of ten years by Dyson’s electronics and mechanical specialists, DDM V2 incorporates super-strength neodymium magnets. This is what enables the high speed of the impeller and the motor’s large power to weight ratio. The new Dyson machines that DDM V2 drives can now deliver twice the electrical efficiency of Dyson’s previous handhelds, using energy with optimum efficiency. DDM V2 marks a decisive moment in Dyson’s history. Its patented motor technology opens up diverse engineering possibilities for Dyson – powering smaller, lighter, greener appliances. DDM V2 is now set for mass production and will power 1.2 million Dyson machines in 2009 alone.

HOW V2 WORKS Conventional motors need carbon brushes that maintain permanent electrical contact with the spinning commutator, in order to complete the electrical circuit required to switch polarity and create torque. This mechanical switching is an inherent disadvantage of brushed motors, because of the reliance of contact between moving parts. The problem with conventional brushed motors is that they emit carbon particles. They’re dirty and have a limited lifespan.

Dyson digital motors don’t use carbon brushes because they don’t rely on a closed electrical circuit through a commutator. There is no contact to the rotor – just a strong electromagnetic field generated in the stator. The polarity of this field is switched digitally (by a microprocessor) situated within the onboard power electronic circuit. Digital switching is clean because it’s mechanically simple.

V2 FACTSHEET Fast: Spinning at up to 104,000rpm, Dyson’s motors are the fastest, highest power density motors ever developed for domestic appliances. Constant motor power maintains maximum performance, regardless of changes in battery voltage or operating speed. Small: DDM V2 is a third of the size of the motor in the DC16, at 55.8mm in diameter, and 139g in weight. Energy efficient: Conventional motors rely on carbon brushes which spark, wear down and emit carbon dust. This means they can waste up to 50% of energy in converting electricity into air power. Using only 200W, DDM V2 is twice as efficient the motor in the DC16, and its design prevents the release of carbon particles into the air. Intelligent: This digital motor is self-regulating to optimise efficiency. An internal microprocessor makes up to 3,300 adjustments each second to control its speed. It monitors, responds and self-adapts to vacuum airflow. Tough construction: DDM V2 has fewer components and a simple, robust design. Tough magnets replace grinding brushes. And high-spec mechanical parts ensure that DDM V2 lives longer. Materials: Neodymium rare-earth magnets, four times stronger than ferrite magnets, replace conventional carbon brushes that wear out and pollute the vacuum cleaner’s airflow. Neodymium magnets are commonly found in computer hard drives and electric cars. DDM V2 has a turbocharger style 3D impellor, optimised for performance and made from a carbon fibre reinforced polymer normally used in aerospace engineering.

More about Dyson
       There are 45 people in Dyson’s Wiltshire based motors team. The headquarters at Malmesbury, Wiltshire are home to around 300 engineers and scientists who constantly strive to develop new and better technologies. Over the last five years, Dyson has quadrupled the amount it invests on RDD. The size of Dyson’s testing area in Malaysia is 4385 m². Dyson turnover for 2007 was £611m – an increase of 19% (2006: £515m). Dyson operating profit in 2007 was £89m – an increase of 7% (2006:£83m). Dyson vacuum cleaners are designed and engineered in the UK and every week 100,000 are assembled in Malaysia.

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Dyson employs more than 2,400 people worldwide (2008). 82% of Dyson owners would recommend a Dyson to a friend (Hall and Partners, June 2006). In 2008, 80% of Dyson machines were sold outside the UK, compared to just 30% four years ago. The total number of Dyson vacuum cleaners sold worldwide, since 1993 is 28.6 million (2008) – and still counting… (11.6 million of these were sold between 2006 and 2008). Dyson’s DC24 was the NO.1 upright by value within 5 weeks of launching in the UK (GfK, 2008). For further press information please contact the Dyson Press Office: 020 7833 8244


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