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AssigneeNidec Sankyo Corporation
InventorsJun OTSUJI, Akihiro ITO, Hirokazu WATANABE, Hideyuki ODAGIRI
Estimating the term…
A motor control device may include a position command output means, a first subtraction means that calculates and outputs a position deviation, a position control means, a second subtraction means that calculates and outputs a position deviation, a speed control means that outputs a torque command, a limiter limits the level of the torque command, a motor drive means, and a voltage fluctuation detection means. When the voltage fluctuation detection means detects that the voltage of said power source has dropped below a predetermined reference level, either the position command output means varies the position command so as to reduce the rotational speed of the motor and/or said position control means limits said speed command to be output.
1-6. (canceled)
A control system comprising:
A position estimation method, in a control system having a motor for driving a body to be controlled, a sensor for detecting the position data of said body to be controlled based on the rotational angle of said motor at a predetermined cycle, a servo control unit for servo-controlling said motor, and a position control unit for issuing an operation command (a position command) to said servo control unit, wherein said position control unit generates an operation command to said servo control unit, stores said position data obtained from said sensor together with the time, expresses the position f(t) of said body to be controlled at time t by a polynomial based on said position data, and estimates the position of said body to be controlled at an arbitrary time by a polynomial interpolation.
Dependencies are inferred from the claim text.