Slip adjuster for use in electrical motor controllers

Details Slip adjuster for use in electrical motor controllers Slip adjuster for use in electrical motor controllers

1997-06-30

1998-08-18

Ro, Bentsu

Electricity: motive power systems

Induction motor systems

Primary circuit control

318801, 318807, H02P 5415

Patent

active

057962367

ABSTRACT:
A system for accurately determining a slip frequency for use in controlling an induction motor. The system includes two tables for determining ideal flux and flux current levels as a function of rotor speed and uses values from those tables to determine an actual rotor inductance required for calculating the slip. The system also generates a slip multiplier which is used to increase or decrease the slip as a function of the flux current to compensate for changing rotor resistance.

REFERENCES:
patent: 3962614 (1976-06-01), Rettig
patent: 4001660 (1977-01-01), Lipo
patent: 4160940 (1979-07-01), Wolf
patent: 4484126 (1984-11-01), Fulton et al.
patent: 4672288 (1987-06-01), Abbondanti
patent: 5166593 (1992-11-01), De Doncker et al.
patent: 5365158 (1994-11-01), Tanaka et al.
patent: 5598081 (1997-01-01), Okamura et al.

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