Induction motor vector control

Details Induction motor vector control Induction motor vector control

1989-02-22

1990-10-30

Shoop, Jr., William M.

Electricity: motive power systems

Induction motor systems

Primary circuit control

318798, 318805, H02P 540

Patent

active

049671359

ABSTRACT:
A method and apparatus for vector control of an induction motor. A slip frequency is calculated based on a desired motor torque, a desired motor flux and a motor secondary time constant. An actual value for induction motor angular velocity is estimated as a function of primary current and voltage applied to drive the induction motor. The calculated slip frequency is added to the estimated angular velocity to calculate an angular frequency. The calculated angular frequency is used along with the desired motor torque and the desired motor flux to vary the primary current and voltage so as to drive the induction motor with no .beta.-axis secondary flux.

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