Induction motor with integrated sensor

Details Induction motor with integrated sensor Induction motor with integrated sensor

2007-05-15

2007-05-15

Lam, Thanh (Department: 2834)

Electrical generator or motor structure

Dynamoelectric

Rotary

C310S179000, C310S184000

Reexamination Certificate

active

11168817

ABSTRACT:
An induction motor comprises a stator (10) and a rotor (20), which includes material essentially blocking magnetic flux at high frequencies. A difference in number of stator slots and rotor slots is chosen so that the inductance of a winding provided in a stator slot is different from the inductance of a winding provided in another stator slot. A sense means, such as stator winding or separate sense winding, is provided in at least one of the stator slots and the sense means is arranged to allow measuring of the inductance thereof. The sense means constitutes an integrated sensor, which is both inexpensive and reliable. A method of sensing the rotor position and/or speed of an induction motor is also described.

REFERENCES:
patent: 5796194 (1998-08-01), Archer et al.
patent: 6504275 (2003-01-01), Nondahl et al.
patent: 6603226 (2003-08-01), Liang et al.
patent: 2002/0135254 (2002-09-01), Peachee et al.
patent: 2006/0197393 (2006-09-01), Labriola, II

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