Electricity: motive power systems – Motor-reversing – Armature or primary circuit control
Patent
1974-08-29
1976-09-28
Rubinson, Gene Z.
Electricity: motive power systems
Motor-reversing
Armature or primary circuit control
318230, 318231, H02P 540
Patent
active
039834638
ABSTRACT:
In a method and apparatus for controlling the speed of an induction motor energized from a source of variable frequency, e.g. a controllable inverter, a control signal which is a function of the primary current of the induction motor is produced, a predetermined slip frequency pattern signal is generated in accordance with the control signal, and the source is controlled in accordance with the slip frequency pattern signal for controlling the operating frequency. By suitably determining the shape of the slip frequency pattern signal it is possible to operate the induction motor with either one of normal induction motor characteristic, DC series motor characteristic, DC shunt motor characteristic, DC weak field motor characteristic and DC compound motor characteristic, and to operate the induction motor for smooth and continuous power regeneration.
REFERENCES:
patent: 3500158 (1970-03-01), Landau et al.
patent: 3512067 (1970-05-01), Landau
patent: 3529223 (1970-09-01), Vergez, Jr.
patent: 3593083 (1971-07-01), Blaschke
patent: 3718847 (1973-02-01), Graf et al.
patent: 3769564 (1973-10-01), Rettig
Nabae Akira
Shimamura Takeo
Rubinson Gene Z.
Tokyo Shibaura Denki Kabushiki Kaisha
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