DEVICE FOR DRIVING/CONTROLLING AC MOTOR

WIPO Patent Application WO/2011/077714

A1

Provided are hydraulic pumps (32a, 32b) for discharging working oil, a group of hydraulic cylinders (35), a traveling motor (36), an operating device (17) operated to operate/control the group of hydraulic cylinders (35) and the traveling motor (36), an electric motor (33) for driving hydraulic pumps (32a, 32b), a battery (41) for outputting DC power, an inverter (43) for inverting the DC power from the battery (41) into AC power and supplying the power to the electric motor (33), a mode switching means (17a) operated to adjust the magnitude of the AC power supplied to the electric motor (33), and a control device (44) for controlling the adjustment of the magnitude of the AC power supplied to the electric motor (33).

WO/1999/027196	METHOD AND APPARATUS FOR CALCULATING WORK CYCLE TIMES
JP2000112551	MANEUVERING DEVICE
WO/2008/039598	CONTROL AND METHOD OF CONTROL FOR AN EARTHMOVING SYSTEM

KUMEUCHI, Kengo (205, Uwadaira, Sakakimachi, Hanishina-gu, Nagano 05, 〒3890605, JP)
粂内　健吾 (〒05 長野県埴科郡坂城町上平２０５　株式会社竹内製作所内 Nagano, 〒3890605, JP)

JP2010/007421

June 30, 2011

December 22, 2010

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TAKEUCHI MFG. CO., LTD. (9347, Oaza Sakaki Sakakimachi, Hanishina-gu, Nagano 01, 〒3890601, JP)
株式会社竹内製作所 (〒01 長野県埴科郡坂城町大字坂城９３４７ Nagano, 〒3890601, JP)
KUMEUCHI, Kengo (205, Uwadaira, Sakakimachi, Hanishina-gu, Nagano 05, 〒3890605, JP)

E02F9/20; H02P27/06

OHNISHI, Shogo (S.OHNISHI & ASSOCIATES, HIGASHI-IKEBUKURO SS BUILDING 1F 3-20-3, Higashi-Ikebukuro, Toshima-k, Tokyo 13, 〒1700013, JP)

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