Patent ID: 7560884
Filing Date: 2009-07-14
Classification: H02P

Abstract:
1. An electronic braking and energy recycling system of a DC (direct current) brushless motor comprising, means for launching an electronic braking task wherein a phase voltage occurred in an inverse mode is applied onto a motor coil corresponding thereto, and a gate voltage signal with positive and negative cycles is used to control an upper-side and lower-side branches to switch, so as to redirect a current flown through the motor back to a power source end; means for achieving a maximum recycling ratio for dynamic power of the motor without being interfered with the motor coil; means for the motor coil restoring the current flown back to a zero-current state when the motor is operated in a high speed or the motor requires a small torsion; means for the motor coil operating with the current in a continuous state when the motor is operated in a low speed or the motor requires a large torsion; means for signal decoding; means for converting a torsion command into a current command; means for converting the current signal into a voltage signal; means for amplifying the voltage signal and transmitting the voltage signal to a comparator; and means for forwarding an output from the comparator to a current mode pulse width modulation controller.