Circuit for determining position of a movable member
AssigneeJohnson Electric S.A.
InventorsYi Yong WU, Ping LIU, Xiao Ming WANG
Life of this patent
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Abstract
A circuit for determining a position of a movable member driven by at least one electric motor includes a sampling circuit for generating a ripple signal indicative of a rotational number of the motor and a converter for converting the ripple signal to a pulse signal which has a frequency the same as the frequency of the ripple signal.
Claims15
A circuit for determining a position of a movable member driven by at least one electric motor, comprising:
- a sampling circuit for generating a ripple signal indicative of a rotational number of the motor;
- and
- a converter for converting the ripple signal to a pulse signal which has a frequency proportional to or the same as the frequency of the ripple signal.
A method for determining a position of a movable member driven by at least one electric motor, comprising the step of converting a ripple signal indicative of a rotational number of the motor to a pulse signal which has a frequency the same as the ripple signal.
Dependencies are inferred from the claim text.