Control for improving induction transient response by excitation

Details Control for improving induction transient response by excitation Control for improving induction transient response by excitation

1987-07-08

1988-08-09

Smith, Jr., David

Electricity: motive power systems

Induction motor systems

Primary circuit control

318807, H02P 540

Patent

active

047630574

ABSTRACT:
A variable frequency AC induction motor servo control system wherein slip is momentarily increased in response to error signal transients. In a preferred embodiment, a phase shift is introduced in the energizing stator current as the servo velocity error signal increases over at least the lower portion of the error signal range, the maximum phase shift being between 45.degree. and 90.degree..

REFERENCES:
patent: 4158801 (1979-06-01), Hirata
patent: 4310789 (1982-01-01), Akamatsu
patent: 4330741 (1982-05-01), Nagase et al.
patent: 4437051 (1984-03-01), Muto et al.
patent: 4447771 (1984-05-01), Whited
patent: 4451771 (1984-05-01), Nagase et al.
patent: 4456868 (1984-06-01), Yamamura et al.
patent: 4459534 (1984-07-01), Nagase et al.
patent: 4499414 (1985-02-01), Fujioka et al.

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