Patent ID: 6919702

Claim:
A system for controlling a power bridge for a brushless servo motor for motor rotor passivation in the event of a failure, the system comprising: a sensor assembly for generating signals indicative of the position of the motor rotor; a pulse width modulated (PWM) interface to the power bridge; a first information processor in communication with said sensor assembly for receiving the generated signals to establish an A Lane decision-making channel control path to the PWM interface; a second information processor in communication with said sensor assembly for receiving the generated signals to establish a B Lane decision-making channel control path to the PWM interface; a signal detector in communication with said sensor assembly for receiving the generated signals to validate the sensing of the motor rotor position information, said signal detector inhibiting rotation of the motor rotor when the sensor assembly generates an invalid signal; and said PWM interface comprising logic for interfacing said first information processor and said second information processor to the power bridge of the brushless servo motor, said logic inhibiting rotation of the motor rotor when a decision from the A Lane differs from a decision from the B Lane.