Method for controlling the speed of a single-phase asynchronous

Details Method for controlling the speed of a single-phase asynchronous Method for controlling the speed of a single-phase asynchronous

1998-09-28

1999-11-23

Ro, Bentsu

Electricity: motive power systems

Induction motor systems

Primary circuit control

318775, 318778, 318781, 318797, H02P 126

Patent

active

059906537

ABSTRACT:
Method for controlling the speed of a single-phase asynchronous induction motor, the stator of which is equipped with a main winding (BP) and an auxiliary winding which consist of half-windings (B1, B2) which are magnetically coupled and wound in opposite directions, in which method the main winding is powered directly using an AC source and the auxiliary winding is powered using a current delivered by a full-wave rectifier and using two switching devices (T1, T2), so as to generate in the auxiliary winding a current which is phase-shifted by 90.degree.. The method consists in varying the motor torque by altering the time that at least one of the switches spends closed/open.

REFERENCES:
patent: 4459532 (1984-07-01), Schutten et al.
patent: 4520303 (1985-05-01), Ward
patent: 4658195 (1987-04-01), Min
patent: 5334922 (1994-08-01), Manini
patent: 5402053 (1995-03-01), Divan et al.
patent: 5598080 (1997-01-01), Jensen et al.

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