Iron-Less Rotor Dc Motor Has 6Ms Time Constant
09 January 2008
Electro Mechanical Systems is currently stocking an iron-less rotor dc motor from Faulhaber that has a mechanical time constant of just 6ms. The 22mm diameter unit reaches a speed of 4,500rpm in this time, equivalent to a coil surface acceleration of 2,500km/h/s. High efficiency is assured by the use of a rare earth magnet and, depending upon which of six windings is selected, the motor will offer up to 11W, representing a substantial power to weight ratio for a 32mm long unit.
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