Electricity: motive power systems – Constant motor current – load and/or torque control
Reexamination Certificate
2008-06-16
2011-12-27
Benson, Walter (Department: 2837)
Electricity: motive power systems
Constant motor current, load and/or torque control
C318S400020, C318S461000, C318S727000, C318S768000, C318S801000, C318S807000, C318S811000
Reexamination Certificate
active
08084976
ABSTRACT:
A motor control device performing vector control for a motor that drives a load whose load torque varies periodically. The motor control device has: a motor speed deriving portion estimating or detecting a motor speed; a speed controller producing a specified torque current value such that the motor speed is made to follow a specified motor speed value fed from outside; a resonance filter producing a corrected torque current value by receiving a control value that varies with variations in the load torque and emphasizing a periodic variation component of the control value; a torque current corrector producing a specified superimposed torque current value by superimposing the corrected torque current value on the specified torque current value; and an adjusting portion adjusting, based on the specified superimposed torque current value, a degree of emphasis placed on the variation component by the resonance filter. The vector control is performed according to the specified superimposed torque current value.
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Agared Gabriel
Benson Walter
NDQ&M Watchstone LLP
SANYO Electric Co., Ltd.
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