This initial patent covers the removal of the noise induced by the motor allowing a clean back EMF signal, which then is used to obtain optimal commutation. When the clean back EMF signal is used with the Agile sensorless algorithm the results are 100% start up reliability and improved low speed control. Chris Butlin, Agile Systems VP of Engineering noted, 'this new breakthrough technology will allow for more robust running of the motor, increasing motor speed and efficiency. Permanent magnet motors that induce a lot of noise from saliency can greatly benefit from this technology by being able to acquire a clear back EMF signal where formally this saliency would contaminate the back EMF signal'.Sensorless motor drive technology is patented: News from Agile Systems Agile Systems - Products
A bit like the waterhammer " problem " .