CONFIGURATION OF A STATOR OF A ROTATING ELECTRIC MACHINE

• US 20120326666A1
• Filed: 06/25/2012
• Published: 12/27/2012
• Est. Priority Date: 06/24/2011
• Status: Active Grant

• Current Assignee: Valeo Siemens eAutomotive France SAS (Valeo SE)
• Original Assignee: Valeo Systemes De Controle Moteur (Valeo SE)
• Inventors: Bruyere, Antoine
• Granted Patent: US 9,124,202 B2
• Time in Patent Office: Days
• US Class Current: 320/109
• CPC Class Codes: B60L 2220/54 Windings for different functions
• CPC Class Codes: B60L 2220/56 with switched windings
• CPC Class Codes: B60L 50/16 with provision for separate direct mechanical propulsion
• CPC Class Codes: H02J 2207/20 Charging or discharging characterised by the power electronics converter
• CPC Class Codes: H02J 7/02 for charging batteries from ac mains by converters
• CPC Class Codes: H02J 7/14 for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle
• CPC Class Codes: H02J 7/1415 with a generator driven by a prime mover other than the motor of a vehicle
• CPC Class Codes: H02K 2213/09 Machines characterised by the presence of elements which are subject to variation, e.g. adjustable bearings, reconfigurable windings, variable pitch ventilators
• CPC Class Codes: H02K 3/28 Layout of windings or of connections between windings windings for pole-changing H02K17/06, H02K17/14, H02K19/12, H02K19/32
• CPC Class Codes: H02P 6/085 in a bridge configuration
• CPC Class Codes: Y02T 10/64 Electric machine technologies in electromobility
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/7072 Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors

Abstract

Method of configuring a rotating electric machine (1) stator (2), comprising the following steps:

• • employing a stator (2) having a carcass (5) on which electrical conductors are coiled so as to form N coils (6_j), N being greater than or equal to four and,
  • electrically connecting the coils (6_j) to an electrical power supply device (7) in such a way that each coil (6_j) is traversed by a specific electric current (i_j) delivered by the electrical power supply device (7),
    the connection of the stator (2) to the electrical power supply device (7) being performed in such a way that as one progresses around the axis (X) of the stator away from a reference coil (6₁), the phase shift between the current (i₁) traversing the said reference coil and the current (i_j) traversing each of the other coils (6_j) and specific to the latter varies in a strictly monotonic manner as one progresses.

Claims

1. A method of configuring a rotating electric machine stator, comprising:

employing the rotating electric machine stator having a carcass on which electrical conductors are coiled to form N coils, N being greater than or equal to four and;

electrically connecting the N coils to an electrical power supply device so that each coil is traversed by a specific electric current delivered by the electrical power supply device,

the connection of the stator to the electrical power supply device being performed so that as one progresses around an axis of the stator away from a reference coil, the phase shift between a current traversing the reference coil and the current specific to each of the other coils varies in a strictly monotonic manner as one progresses away from the reference coil.

2. The method according to claim 1, in which the N coils are distributed in a uniform manner around the axis of the stator and in which the phase shift of the current varies in a regular manner between successive coils.

3. The method according to claim 2, in which two successive coils are shifted angularly by a mechanical angle substantially equal to 2·

k·

Π

/N and the two successive coils are powered by currents mutually phase-shifted by an electrical angle substantially equal to 2·

k·

Π

N, k being a relative integer.

4. The method according to claim 1 wherein each current delivered by the power supply device has a same amplitude.

5. The method according to claim 1 wherein the electrical power supply device delivers a three-phase current and is connected to the N coils of the stator in such a way that each coil has an input in current from the power supply device which is common with another coil of the stator, the other coil forming a coil complementary to the corresponding coil.

6. The method according to claim 5, in which the coiling and the connection of the N coils make it so that the corresponding coil and the complementary coil are diametrically opposite with respect to the axis of the stator and are traversed by currents phase-shifted by an electrical angle equal to Π

.

7. The method according to claim 6, wherein the corresponding coil forms a first part of a winding of a phase of the stator while the complementary coil forms a second part distinct from the first part of the winding of the phase.

8. The method according to claim 7, wherein the current input of the winding of the phase of the stator is arranged substantially at a midpoint of the winding.

9. The method according to claim 1, wherein the rotating electric machine is a synchronous machine.

10. The method according to claim 1, wherein the electrical power supply device is an electrical network that is connected to the N coils of the stator without an intermediate voltage converter.

11. A method of charging a battery from an electrical power supply device with aid of a rotating electric machine, in which:

a stator of the rotating electric machine is configured by applying the method according to claim 1; and

the battery is charged by using the N coils of the stator, the currents having flowed in said coils being rectified before charging the battery.

12. The method according to claim 11, wherein

each coil has an input in current from the power supply device which is common with another coil of the stator, the other coil forming a coil complementary to the corresponding coil,

the corresponding coil forms a first part of a winding of a phase of the stator while the complementary coil forms a second part distinct from the first part of the winding of the phase, and

wherein the current input of the winding of the phase of the stator is arranged substantially at a midpoint of the winding.

13. The method of claim 11, wherein the rotating electric machine comprises a rotor configured so that the rotor is stationary or rotates when the coils of the stator are supplied with current so as to recharge the battery.

14. A system, comprising:

a rotating electric machine stator, comprising a carcass and electrical conductors coiled on the carcass to form N coils, N being greater than or equal to four, and

an electrical power supply device delivering a specific electric current to each coil,

wherein a connection of the stator to the electrical power supply device is made such that as one progresses around an axis of the stator away from a reference coil, a phase shift between a current traversing the reference coil and the current specific to each of the other coils varies in a strictly monotonic manner as one progresses away from the reference coil.

15. The system according to claim 14, two successive coils being, as one progresses around the axis of the stator, shifted angularly by a mechanical angle substantially equal to 2·

k·

Π

/N, and the two successive coils being connected to the electrical power supply device to be respectively powered by currents mutually phase-shifted by an electrical angle substantially equal to 2·

k·

Π

/N, k being a relative integer.