Field control system for controlling induction machines

Details Field control system for controlling induction machines Field control system for controlling induction machines

1979-05-02

1981-04-21

Rubinson, Gene Z.

Electricity: motive power systems

Induction motor systems

Primary circuit control

H02P 540

Patent

active

042635411

ABSTRACT:
In a system for controlling field of an induction machine such that the torque of the induction machine is reduced in proportion to a running speed thereof a frequency-voltage converter converts the frequency of a pulse signal (f.sub.N or f) given from or to the induction machine into a voltage. A function generator varies the voltage into an output (V.sub.FG) of a predetermined variation characteristic. A multiplier multiplies the output with a reference value (I.sub.2) indicative of a desired torque. And a voltage-frequency converter converts the product into a frequency (f.sub.S) used for the control of the induction machine.

REFERENCES:
patent: 3593083 (1971-07-01), Blaschke
patent: 3805135 (1974-04-01), Blaschke
patent: 3824437 (1974-07-01), Blaschke
patent: 4088934 (1978-05-01), D'Atre et al.
Field-Oriented Closed-Loop Control of an Induction Machine with the New Transvektor Control System, Floler & Ripperger, Siemans Review No. 6, pp. 248-251 (1972).

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