Abstract: The method can be used for the regulation of power in an alternating current electrical network (ACNW; ACNW1, ACNW2), using a conversion system (PCS) having at least two terminals (1,2; 1,2,3; 1,2,3,N) for connection to the network, wherein each of said terminals has a corresponding electrical potential. Each of the potentials of these terminals has an upper and a lower envelope, the difference between which, or envelope voltage (VEP,EN), is a variable positive continuous quantity having a maximum value (VEA) called the envelope amplitude.

Abstract: The switching cell (1), comprises, between the terminals of a supply source (2) supplying a voltage (VC), a controlled power switch (T) and a current recirculation device (CRD) including a diode or a junction, between which there is defined a common terminal (O) of the cell (1). Across the current recirculation device (CRD) there are connected controlled electric charge supply means (TL, VL, DL; TH, VH, DH) comprising a first generator circuit (TL, VL, DL) for generating a low voltage, including a first d.c. voltage source (VL), an associated first controlled switch (TL), and a first diode (DL), and adapted to supply an electric charge sufficient to cause the reverse-recovery of the current recirculation device (CRD); and a second generator circuit (TH, VH, DH) for generating a higher voltage, including a second d.c.

Abstract: The method can be used for the regulation of power in an alternating current electrical network (ACNW; ACNW1,ACNW2), using a conversion system (PCS) having at least two terminals (1,2; 1,2,3; 1,2,3,N) for connection to the network, wherein each of said terminals has a corresponding electrical potential. Each of the potentials of these terminals has an upper and a lower envelope, the difference between which, or envelope voltage (VEP,EN), is a variable positive continuous quantity having a maximum value (VEA) called the envelope amplitude.

Abstract: The system (CVT) includes a first electrical machine (M1) with a first rotor (R1) provided with a multiphase winding (W1) and fixed firmly to the shaft (1) of the internal combustion engine (ICE) and a second rotor (R2) or intermediate rotor coaxial with the first rotor (R1) and carrying first magnetic means (PM1) operatively cooperating with the winding (W1) of the first rotor (R1), the intermediate rotor (R2) being coupled with at least one axle (2) of the motor vehicle, and a second rotary electrical machine (M2) coaxial with the first (M1) and including a stator (ST), which is arranged on the opposite side of the intermediate rotor (R2) to the first rotor (R1) and is provided with a multiphase winding (W2), as well as the intermediate rotor (R2) which also carries second magnetic means operatively cooperating with the winding (W2) of the stator (ST), a first inverter and a second inverter (I1, I2) of which the a.c.

Abstract: The electric machine (M) comprises an armature (A) and an inductor (B), the inductor (B) having for each pair of poles (N, S) of the armature (A), n teeth (20) identical to one another and n slots (21) and being provided with a winding (W) housed in the said n slots. The armature (A) has its surface facing the air gap (G) divided into 2N elements or samples (1–12) with N being a whole multiple of n, having substantially the same extent in the said direction of relative displacement, and having a respective magnetic potential value. Each sample (1–12) of the armature (A) is associated with a value of total magnetic permeance (pi) at the air gap (G) in a predetermined alignment condition between the inductor (B) and the armature (A). The armature (A) comprises a plurality of magnetically distinct ferromagnetic bodies (30, 31, 32; . . . ) each of which couples at least two armature samples in such a way as to ensure a substantial magnetic equipotentiality.

Abstract: An electric machine (M) comprises a field (A) and an armature (B) between which is defined an air gap (G). The field (A) has at least one pair of poles (N, S) and the armature (B) has n teeth (20) and n slots (21) per pair of poles (N, S) of the field (A). The surface of the field (A) facing the air gap (G) is divided into 2n elements or samples (1–12) having the same extent along the direction of relative displacement between armature and field, and having a respective magnetic potential value (?i). Each sample (1–12) of the field (A) has a respective total permeance value (pi) at the air gap (G) in a predetermined relative position between armature (B) and field (A). The field (A) comprises a plurality of magnetically distinct ferromagnetic bodies (30, 31, 32, . . . ) each of which couples at least two samples of the field in such a way as to ensure a substantial magnetic equipotentiality.

Abstract: The electric machine (M) comprises an armature (A) and an inductor (B), the inductor (B) having for each pair of poles (N, S) of the armature (A), n teeth (20) identical to one another and n slots (21) and being provided with a winding (W) housed in the said n slots. The armature (A) has its surface facing the air gap (G) divided into 2N elements or samples (1-12) with N being a whole multiple of n, having substantially the same extent in the said direction of relative displacement, and having a respective magnetic potential value. Each sample (1-12) of the armature (A) is associated with a value of total magnetic permeance (pi) at the air gap (G) in a predetermined alignment condition between the inductor (B) and the armature (A). The armature (A) comprises a plurality of magnetically distinct ferromagnetic bodies (30, 31, 32; . . . ) each of which couples at least two armature samples in such a way as to ensure a substantial magnetic equipotentiality.

Abstract: The system (CVT) includes a first electrical machine (M1) with a first rotor (R1) provided with a multiphase winding (W1) and fixed firmly to the shaft (1) of the internal combustion engine (ICE) and a second rotor (R2) or intermediate rotor coaxial with the first rotor (R1) and carrying first magnetic means (PM1) operatively cooperating with the winding (W1) of the first rotor (R1), the intermediate rotor (R2) being coupled with at least one axle (2) of the motor vehicle, and a second rotary electrical machine (M2) coaxial with the first (M1) and including a stator (ST), which is arranged on the opposite side of the intermediate rotor (R2) to the first rotor (R1) and is provided with a multiphase winding (W2), as well as the intermediate rotor (R2) which also carries second magnetic means operatively cooperating with the winding (W2) of the stator (ST), a first inverter and a second inverter (I1, I2) of which the a.c.

Abstract: An electric machine (M) comprises a field (A) and an armature (B) between which is defined an air gap (G). The field (A) has at least one pair of poles (N, S) and the armature (B) has n teeth (20) and n slots (21) per pair of poles (N, S) of the field (A).

Abstract: A converter of the electric energy fed by a unidirectional voltage source, comprising a voltage inverter circuit arranged to deliver an alternating voltage, possibly polyphase, to an inductive load such as an electric motor, wherein between the energy source and the voltage inverter circuit there is inserted a set of components arranged for controlling in an active manner the supply voltage of the inverter circuit, limiting the maximum value of the voltage applied thereto and assisting the commutation by transitorily bringing to zero (or to a negative value) the supply voltage applied to the inverter circuit during the periods of time in which any commutation should be carried out therein. This set of components includes a capacitor connected, through a diode, in parallel to the unidirectional voltage source, a first controlled switch inserted in parallel to the diode, and a second controlled switch inserted in parallel to the inverter circuit input.

Abstract: A reluctance synchronous electric machine whose rotor is of the kind with a magnetically axial segmentation and includes magnetically axial layers of a ferromagnetic material alternated with intercalary layers of a non-ferromagnetic material. Some permanent magnets are inserted within the intercalary layers and they are oriented in such a way that they produce a magnetic flux oriented along the quadrature axis of the rotor in the sense opposite the magnetic flux produced along the same quadrature axis by the feed current flowing through the stator windings. Preferably the permanent magnets are proportioned in order to compensate at least by approximation the magnetic flux along the quadrature axis when the current flowing through the stator windings is the nominal current of the machine.

Abstract: A reluctance electric machine which comprises a stator with electric windings, a rotor including ferromagnetic material members, inserted into the stator and separted therefrom by an air gap, and members of non-ferromagnetic material inserted in the rotor in such a way that the cross section of the ferromagnetic material members of the rotor, at least near the air gap, is decreased by the insertion of the members of non-ferromagnetic material in such a way that the ratio between the ferromagnetic material cross section and the whole cross section available does not exceed 0.6, and the ratio between at least one linear dimension of the non-ferromagnetic material members, lying in a plane tangent to the air gap, and the thickness of the machine air gap, does not exceed 5. The electric machine is fed by an electronic circuit for vectorial control (in amplitude and phase) of the current feeding the electric windings of the stator.