Control method for induction motors

Details Control method for induction motors Control method for induction motors

1983-10-04

1985-03-05

Smith, Jr., David

Electricity: motive power systems

Induction motor systems

Primary circuit control

318805, 318808, H02P 540

Patent

active

045033765

ABSTRACT:
A quick response vector control method which is one of methods for controlling a speed of an induction motors without a speed detector; in which a voltage of the motor is detected to resolve into a vector component e.sub.d parallel with an exciting current component vector of a primary current and a vector component e.sub.q orthogonal to said exciting current component vector, and a frequency of the primary current is controlled to maintain the vector component e.sub.d at zero, while at the same time the primary current is controlled corresponding to a difference between the vector component e.sub.q and the speed command signal.

REFERENCES:
patent: 3593083 (1971-07-01), Blaschke
patent: 3904942 (1975-09-01), Holtz
patent: 4338559 (1982-07-01), Blaschke et al.
patent: 4451771 (1984-05-01), Nagase et al.
patent: 4459534 (1984-07-01), Nagase et al.

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