Vector control system for a squirrel-cage asynchronous electric

Details Vector control system for a squirrel-cage asynchronous electric Vector control system for a squirrel-cage asynchronous electric

1990-03-21

1991-04-23

Ip, Paul

Electricity: motive power systems

Induction motor systems

Primary circuit control

318803, 318807, H02P 528

Patent

active

050102885

ABSTRACT:
A vector control system for a squirrel-cage asynchronous motor powered by a width-modulated pulse generator, the system including a device for evaluating the modulus and the phase of at least one of the fluxes in the motor relative to a fixed frame of reference, and a device for evaluating first in-phase and quadrature components, relative to the flux of at least one of the currents supplied to the motor. The system also includes means a device for determining second in-phase and quadrature components relative to the flux in the motor, defining a control voltage as a function at least of the first components and of a requested torque value, together with means a device for converting the second components into a corresponding polar representation having a modulus and an argument, for the purpose of controlling the pulse generator.

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Patent Abstracts of Japan, vol. 6, No. 226 (E-141) (1104), Nov. 11, 1982, & JP-A-57 129190 (Meidensha), Aug. 11, 1982.

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