초록 ▼

A digital servo control system for controlling a drive motor accumulates speed and phase error numbers and produces a pulse width modulated signal in response thereto. Phase errors are measured by counting pulses of a clock signal between the arrival of a position signal related to a rotational posi

A digital servo control system for controlling a drive motor accumulates speed and phase error numbers and produces a pulse width modulated signal in response thereto. Phase errors are measured by counting pulses of a clock signal between the arrival of a position signal related to a rotational position of the drive motor and the arrival of a reference signal. An automatic residual error compensating circuit controls a delay applied to the position signal in accordance with residual phase error to minimize the same.

대표청구항 ▼

A servo control apparatus for controlling rotation of a rotary member comprising: means for driving said rotary member; means for generating an angular position signal related to an angular position of said rotary member; means for generating a reference signal related to a desired angular position

A servo control apparatus for controlling rotation of a rotary member comprising: means for driving said rotary member; means for generating an angular position signal related to an angular position of said rotary member; means for generating a reference signal related to a desired angular position of said rotary member; means for detecting a time interval related to a time between said angular position signal and said reference signal; means for controlling said means for driving in accordance with said detected time interval whereby phase control of said rotary member is achieved; and means for eliminating residual phase errors by changing a timing of one of said angular position signal and said reference signal in response to said detected time interval.