ROLLING ROLL MOTOR DRIVER

WIPO Patent Application WO/2008/015747

A1

A rolling roll motor driver enabling maximization of rolling ability and improvement of the amount of speed drop by making most of the torques which the motors can output when a material is bitten. The driver comprises an upper motor speed controller for acquiring an upper motor torque current reference from the difference between the upper motor actual rotational speed and an upper motor speed reference, an upper motor torque current limiter and a current controller for controlling the torque of the upper motor, a lower motor rotational speed controller for acquiring a lower motor torque current reference from the difference between the lower motor actual rotational speed and a lower motor rotational speed reference, a lower motor torque current limiter and a current controller for controlling the torque of the lower motor, and a torque distribution control section which is provided between the upper and lower motor rotational speed controllers and the upper and lower motor torque current limiters, compares the upper and lower motor torque current references with the torque current limit value, and adds, if the upper or lower torque current reference exceeds the torque current limit value, the excess amount to the other torque current reference.

MORI RYUZO (JP)
FUKUSHIMA WATARU (JP)
FUKUMA KATSUHIKO (JP)
ISHIDA TAKASHI (JP)

PCT/JP2006/315387

February 07, 2008

August 03, 2006

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TOSHIBA MITSUBISHI ELEC INC (JP)
MORI RYUZO (JP)
FUKUSHIMA WATARU (JP)
FUKUMA KATSUHIKO (JP)
ISHIDA TAKASHI (JP)

B21B37/46; B21B37/00; B21B37/52

JPS6311082A	1988-01-18
JPH01133607A	1989-05-25

TAKADA, Mamoru et al. (Takahashi & Partners 5th Floor, Intec 88Bldg., 20, Araki-ch, Shinjuku-ku Tokyo 07, JP)

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