electric motor braking energy recovery system, medical ventilator incorporating electric motor braking energy recovery system and method for energy recovery

摘要

The present invention relates to a braking energy recovery system (50) of an electric motor (62) comprising a first regulator (52), an energy storage device (54), (56) a second regulator. , a sensor (60) and a controller (58). the first regulator (52) sends a dc link voltage to the energy storage device (54). The second regulator (56) couples to the energy storage device and generates a motor drive signal for the electric motor (62). sensor (60) detects an operating characteristic of the electric motor. controller 58 generates a power management signal 74 for the first regulator comprising a time varying signal as a function of (i) motor speed and / or (ii) counter electromotive force determined by the detected, the first regulator dynamically regulating the dc link voltage so as to maintain substantially constant an energy balance comprising a sum of (a) rotational and / or linear kinetic energy of the electric motor and (b) energy stored in the energy storage device.