Electricity: motive power systems – Induction motor systems
Reexamination Certificate
2007-01-16
2007-01-16
Duda, Rina I. (Department: 2837)
Electricity: motive power systems
Induction motor systems
C318S461000, C318S605000, C318S432000, C318S434000, C187S292000, C187S293000
Reexamination Certificate
active
10506239
ABSTRACT:
A vibration controller controls vibrations generated in a driven object included in a system subject to vibrations due to the dynamic unbalance or eccentricity of a rotating member driven for rotation by an electric motor. An angular position transforming unit (45) and an angular velocity transforming unit (47) transform the output signal of a rotating motion measuring means (C1) into an angular position and an angular velocity, respectively. A sine calculating unit (55) calculates the sine of an angle obtained by adding up the angular position and a predetermined phase angle provided by a phase adjusting unit (49) by an adder (53). A multiplier (61) calculates the product of the output of a gain adjusting unit (57) that multiplies the output of the sine calculating unit (55) by a predetermined gain and the output of a multiplier (59) that calculates the square of the angular velocity. Again adjusting unit (57′) multiplies the output of a sine calculating unit (55′) by a predetermined gain. An adder (68) adds up the respective outputs of the multiplier (61) the gain adjusting unit (57′) and a specified torque calculating unit.
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Duda Rina I.
Toshiba Elevator Kabushiki Kaisha
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