Control apparatus for an inverter with self-adjustment function

Details Control apparatus for an inverter with self-adjustment function Control apparatus for an inverter with self-adjustment function

1987-05-05

1988-12-20

Smith, Jr., David

Electricity: motive power systems

Induction motor systems

Primary circuit control

318800, H02P 540

Patent

active

047927429

ABSTRACT:
A motor current flowing through an inverter-driven induction motor is detected when voltage is applied to the induction motor by the inverter operated under a certain condition on the basis of the vector control. The detected current is converted to two components of a current vector in a d-q coordinate system. Motor constants are calculated on the basis of a component in the d-coordinate axis of a voltage reference set for creating the certain condition and the two converted components of the motor current detected at that time, and control constants in a vector control apparatus for the inverter-driven induction motor are set or adjusted in accordance with the calculated motor constants. According to this invention, the control constants in the vector control apparatus can be easily set or adjusted.

REFERENCES:
patent: 4423367 (1983-12-01), Blaschke et al.
patent: 4442393 (1984-04-01), Abbondanti
patent: 4510430 (1985-04-01), Ashikaga et al.
patent: 4672288 (1987-06-01), Abbondanti
Fitzgerald et al., Electric Machinery, McGraw-Hill, 1952, pp. 415-419.
Deshpande et al, "A New Method of Determining Rotor Leakage Reactance and Resistance of a Three Phase Motor", Institution of Electrical Engineers, Paper No. 2757U, Feb. 1959.

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