Patent ID: 8564238

Claim:
A device ( 1 ) with a polyphase electrical machine, comprising: an electrical machine ( 2 ), comprising at least: a carcase ( 3 ) of ferromagnetic material, forming a magnetic circuit, and a coil winding of conductive wire, including at least one winding element per phase, the winding elements being suitable to be connected to each other according to a star structure, said coil winding including at least two distinct groups of winding elements, called star windings ( 13 , 14 ), each including, for each phase, a phase winding ( 4 u , 4 v , 4 w , 5 u , 5 v , 5 w , 33 u - w , 34 u - w , 35 u - w ) consisting of at least one winding element, the phase windings of each star winding being connected to each other according to a star structure; and a control device including multiple inverters ( 6 , 7 , 36 , 37 , 38 ), the inverters being suitable for: being supplied with direct or rectified current, being controlled by an interlaced pulse-width-modulated control ( 8 , 9 ) to an identical cutoff frequency between the inverters, and providing, on their phase outputs ( 10 u , 10 v , 10 w ; 11 u , 11 v , 11 w ), an alternating voltage signal having an identical fundamental frequency, amplitude and phase between homologous phase outputs of each inverter, each star winding being supplied with power by at least one associated inverter, which is connected by its respective phase outputs to a phase circuit including the respective phase windings of the star winding, wherein, for each pair of star windings, the phase circuits ( 15 u , 16 u ) include, in series with the homologous phase windings of said star windings, respectively the primary and the secondary of a coupling transformer ( 17 , 18 , 19 ) having negative coupling between primary and secondary, said coupling being suitable for forming, in combination with the respective coupling of the homologous phase windings of said star windings, a resulting negative mutual inductance.