Electricity: motive power systems – Induction motor systems – Primary circuit control
Reexamination Certificate
2007-06-26
2007-06-26
Ip, Paul (Department: 2837)
Electricity: motive power systems
Induction motor systems
Primary circuit control
C318S139000, C318S802000, C318S811000, C475S005000, C180S065800
Reexamination Certificate
active
11337475
ABSTRACT:
A forklift having a cargo apparatus, the responsiveness of which to the operation by a user is improved. The forklift has: a DSP which generates a frequency instruction f* in response to the operation to a cargo apparatus operation lever, a voltage instruction V* from the frequency instruction f* by using the VVVF control, inverter control signals from the voltage instruction v*; an inverter which generates the three-phase electric power in response to the inverter control signal; a hydraulic pump; an induction motor driving a hydraulic pump by using the three-phase electric power; and a cargo apparatus which is driven by the hydraulic pressure supplied from the hydraulic pump.
REFERENCES:
patent: 4713595 (1987-12-01), Yonemoto
patent: 4785225 (1988-11-01), Horie et al.
patent: 4961042 (1990-10-01), Imaseki
patent: 4994973 (1991-02-01), Makino et al.
patent: 5278485 (1994-01-01), Kim
patent: 5278486 (1994-01-01), Kim
patent: 5635689 (1997-06-01), Shepard et al.
patent: 5638387 (1997-06-01), Palleggi et al.
patent: 5977742 (1999-11-01), Henmi
patent: 6009003 (1999-12-01), Yeo
patent: 6755267 (2004-06-01), Yamada et al.
patent: 7053568 (2006-05-01), Rudinec
patent: 2002/0068655 (2002-06-01), Yamada et al.
patent: 2003/0167114 (2003-09-01), Chen
patent: 2006/0061309 (2006-03-01), Rudinec
patent: 7-107797 (1995-04-01), None
patent: 2002-176706 (2002-06-01), None
Mizuno Teruo
Morimoto Masayuki
Nakakita Osamu
Okazaki Yoshimi
Sakurai Takao
Ip Paul
Mitsubishi Heavy Industries Ltd.
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