Method of controlling inverter-driven induction motor

Details Method of controlling inverter-driven induction motor Method of controlling inverter-driven induction motor

1985-08-19

1987-07-14

Smith, Jr., David

Electricity: motive power systems

Induction motor systems

Primary circuit control

318805, 318808, H02P 540

Patent

active

046805265

ABSTRACT:
In induction motor driven by a voltage-type inverter, the torque current component is determined by detecting a primary current flowing to the induction motor. On the basis of the torque current component determined, the output voltage and frequency of the voltage-type inverter are controlled. Additionally, the rotational speed of the induction motor is estimated on the basis of the detected torque current component and the speed of the induction motor is controlled such that the estimated speed signal coincides with a speed command signal.

REFERENCES:
patent: 3989991 (1976-11-01), Brennen et al.
patent: 4451771 (1984-05-01), Nagase et al.
patent: 4459534 (1984-07-01), Nagase et al.
patent: 4503376 (1985-03-01), Okuyama

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