Electricity: motive power systems – Motor-reversing – Armature or primary circuit control
Patent
1975-05-15
1977-06-07
Hickey, Robert J.
Electricity: motive power systems
Motor-reversing
Armature or primary circuit control
318231, 318696, H02K 1702, H02P 800
Patent
active
040286002
ABSTRACT:
A method and apparatus for operating a rotating field machine, which is controlled by an inverter of the type which provides only a predetermined limited number of discrete positions of the stator current vector, in such a manner so that when it is desired to position the machine between two of the discrete vector positions, the discrete positions on each side of the desired vector position are alternatively energized resulting in an average position which is the desired vector position. For operation in a system where the vector can only rotate in one direction apparatus is disclosed which permits the alternate energization to occur by moving the vector at the maximum possible speed over the portion of rotation which is outside an area surrounding the desired position and moving it more slowly while inside this area.
REFERENCES:
patent: 3445741 (1969-05-01), Gerber
patent: 3593083 (1971-07-01), Blaschke
patent: 3719878 (1973-03-01), Ferguson et al.
patent: 3736487 (1973-05-01), Cook et al.
patent: 3742329 (1973-06-01), Giguere
patent: 3748566 (1973-07-01), Brembs
patent: 3829754 (1974-08-01), Rettig
Blaschke Felix
Klautschek Herwig
Hickey Robert J.
Siemens Aktiengesellschaft
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