초록 ▼

A motor control system employing a single Hall sensor 2 providing a position feedback signal to a control circuit 10 is disclosed. The control circuit includes a tach counter circuit 12, a ramp mode circuit 14, an interpolation circuit 16, and a commutation logic circuit 18. Drive signals are output

A motor control system employing a single Hall sensor 2 providing a position feedback signal to a control circuit 10 is disclosed. The control circuit includes a tach counter circuit 12, a ramp mode circuit 14, an interpolation circuit 16, and a commutation logic circuit 18. Drive signals are output to the motor windings by the commutation logic circuit 18. The control state defining the drive signals is advanced on the basis of the estimated rotor position. The estimate of the rotor position is determined by linearly interpolating between Hall signal transitions.

대표청구항 ▼

[ We claim:] [1.] A motor control method for controlling the rotation of a magnetic rotor of a multi-phase motor, said motor comprising said rotor and a stator having at least three phases, said rotor being magnetically coupled to and movable by said stator when said phases of said stator are approp

[ We claim:] [1.] A motor control method for controlling the rotation of a magnetic rotor of a multi-phase motor, said motor comprising said rotor and a stator having at least three phases, said rotor being magnetically coupled to and movable by said stator when said phases of said stator are appropriately energized. comprising the steps of:(a) effecting rotation of said rotor toward a first rotational position;(b) sensing, at a first instant of time, passage of the rotor through said first rotational position, wherein said sensing is performed on the basis of a single output signal of a position sensor positioned adjacent said rotor;(c) effecting rotation of the rotor from said first rotational position toward a second rotational position by generating a first control signal and energizing said stator in accordance with said first control signal;(d) determining, by interpolation, the time at which the rotor passes through said second rotational position; and(e) effecting rotation of the rotor from said second rotational position toward a third rotational position by generating a second control signal and energizing said stator in accordance with said second control signal; andfurther comprising the step of generating a third control signal lagging said third rotational position by a prescribed amount of angular rotation, whereby braking is provided.