Electricity: motive power systems – Induction motor systems – Primary circuit control
Patent
1993-10-29
1994-10-04
Ro, Bentsu
Electricity: motive power systems
Induction motor systems
Primary circuit control
318 51, 212160, H02P 774, B66C 1340
Patent
active
053529650
ABSTRACT:
A container crane driving control system having a main hoisting mode, a travel mode, a boom hoisting mode and a trolley mode comprises a first inverter main circuit unit, a first inverter control unit, a second inverter main circuit unit and a second inverter control unit. The first inverter main circuit unit is selectively controlled by a first V/F constant-control circuit or a first vector control circuit. As a result, a main hoisting squirrel-cage induction motor is vector-controlled and a plurality of traveling squirrel-cage induction motors are V/F constant-controlled. The second inverter main circuit unit is selectively controlled by a second V/F constant-control circuit or a second vector control circuit. As a result, a boom hoisting squirrel-cage induction motor is vector-controlled and at least one trolley squirrel-cage induction motor is V/F constant-controlled.
REFERENCES:
patent: 3783795 (1974-01-01), Helmer
patent: 4838438 (1989-06-01), Ishige et al.
patent: 4890047 (1989-12-01), Maney
patent: 4965847 (1990-10-01), Jurkowski et al.
patent: 5133465 (1992-07-01), Kalan
IEEE Industry Applications Society Annual Meeting 1991, vol. 1, No. 91, pp. 347-353, May 29, 1991, F. Busschots, et al., "Application of Field Oriented Control in Crane Drives".
Kabushiki Kaisha Toshiba
Ro Bentsu
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