ELECTRICALLY-DRIVEN OPERATION DEVICE AND WORKING MACHINE USING SAME

Title:

ELECTRICALLY-DRIVEN OPERATION DEVICE AND WORKING MACHINE USING SAME

Document Type and Number:

WIPO Patent Application WO/2011/096364

Kind Code:

A1

Abstract:

Provided are a highly reliable electrically-driven operation device capable of automatically correcting balance by a simple configuration with a small number of components, and a working machine using the same. A first electrically-driven actuator (1) is provided with an electric motor (M1) comprising a rotor position sensor (S), and a second electrically-driven actuator (2) is provided with an electric motor (M2) comprising no rotor position sensor. The outputs of the first electrically-driven actuator (1) and the second electrically-driven actuator (2) are combined by a trapezoidal link (3). The electric motor (M1) has a positional relationship between a rotor and a magnetic field in which the maximum torque under the operating condition thereof is generated. The electric motor (M2) deviates from a positional relationship between a rotor and a magnetic field in which the maximum torque under the operating condition thereof is generated, and gets into an operating state in which torque lower than the maximum torque is generated.

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Inventors:

YAMASAKI MASARU (JP)
OCHIAI MASAMI (JP)
HAYASE ISAO (JP)

Application Number:

PCT/JP2011/051935

Publication Date:

August 11, 2011

Filing Date:

January 31, 2011

Export Citation:

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Assignee:

HITACHI CONSTRUCTION MACHINERY (JP)
YAMASAKI MASARU (JP)
OCHIAI MASAMI (JP)
HAYASE ISAO (JP)

International Classes:

H02P5/00

Foreign References:

JP2000166294A	2000-06-16
JP2000184788A	2000-06-30
US4689527A	1987-08-25
JPH0884492A	1996-03-26

Other References: