Panasonic Intellectual Property Management Co., Ltd.

Yu-suke Imada

Hiroshi Fujiwara

Kenichi Suzuki

Masaru Nishizono

Motor drive device () according to the present invention includes operation pattern generator (), position and speed controller (), load characteristic compensator (), and load characteristic measurement unit (). Operation pattern generator () increases an absolute value of acceleration, at which a motor speed or a motor position is changed, in each operation pattern. Load characteristic measurement unit () measures the load characteristic to set load characteristic compensator () when torque command indicator is less than or equal to a torque limit value. Load characteristic measurement unit () ends the measurement of the load characteristic without setting load characteristic compensator () when the torque command indicator is greater than the torque limit value.

Motor drive device

A motor drive device () of the present invention includes a command response setting unit (), a position and speed controller (), a load characteristic compensator (), a servo adjuster (), a command response setting function (), a stiffness setting function (), an evaluation indicator measuring function (), and a storage (). The servo adjuster () stores a plurality of command response indicators () and a plurality of stiffness indicators (). The servo adjuster () also generates an evaluation indicator measuring pattern () by a combination of each command response indicator () and each stiffness indicator (). A motor () is driven in accordance with the generated evaluation indicator measuring pattern () while the command response indicators () and the stiffness indicators () are sequentially changed.

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Osaka, Japan

Yu-suke Imada