Patent ID: 8134316

Claim:
A system for braking a motor, comprising: at least one resistor; a contactor connected to the at least one resistor and a motor; and a variable frequency drive electrically connected to the motor, wherein the variable frequency drive comprises: a motor model configured to receive one or more inputs and produce a plurality of first outputs, a speed regulator operably connected to the motor module and configured to process at least a portion of the plurality of first outputs to produce a second output, a flux regulator operably connected to the motor model and configured to process at least a portion of the plurality of first outputs to produce a third output, a torque current regulator operably connected to the motor model and configured to process at least a portion of the plurality of first outputs and the second output to produce a first reference voltage, and a magnetizing current regulator operably connected to the motor model and configured to process at least a portion of the plurality of first outputs and the third output to produce a second reference voltage; and a controller operably connected to the contactor and the variable frequency drive and configured to: load instructions for braking the motor based upon at least the first reference voltage and the second reference voltage, and bases upon the loaded instruction, issue a braking command to the contactor, wherein at least a portion of the contactor closes connecting the at least one resistor to the motor in response to the braking command from the controller.