Brushless motor in top power density, efficientity, speed range, oh the firmity and operating life, structure, validus sexus melior est quam dc motor, controller only cost is higher than permanent magnet dc motor, Brushless motor in performance and other aspects have penicillo than permanent magnet dc motor has utilitas fortius. Cum celeri progressione et favore technologiae electronicarum moderatio, sumptus moderatoris minor erit, volumen minor erit, potentia densitas maior erit, crede motorem sine fine in pluribus casibus magnetem dc motorem permanentem restituturum.