Induction motor switchable between series delta and parallel...

Details Induction motor switchable between series delta and parallel... Induction motor switchable between series delta and parallel...

H - Electricity

02

P

318/111

H02P 7/06 (2006.01) H02K 16/00 (2006.01) H02K 17/36 (2006.01) H02P 5/74 (2006.01)

Patent

CA 2026096

An induction motor of the invention, including a single rotor formed in one-piece and first and second stators disposed side-by-side, has a phase-changing device for varying the phase difference between the rotational magnetic field generated by the first stator and that generated by the second stator. The phase-changing device comprises at least first and second short-circuiting switches for short-circuiting or disconnecting the series-junction nodes of the stator windings. The motor presents three different torque curves suitable for starting operation, intermediate speed operation, and normal or steady-state operation by the switching operation of the first and second switches.

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