Claw rotor provided with an excitation winding insulator, and rotary electrical machine equipped with the claw rotor

Patent metadata

Field	Value
Publication number	US-9960651-B2
Application number	US-201314649885-A
Country	US
Kind code	B2
Filing date	Dec 13, 2013
Priority date	Dec 17, 2012
Publication date	May 1, 2018
Grant date	May 1, 2018

Abstract

A claw rotor ( 2 ) provided with an insulator ( 11 ) for a field coil ( 10 ) and a rotary electric machine equipped with such a rotor, the insulator comprising a plurality of projecting petals ( 121, 131 ) intended to engage with the inner inclined periphery of a claw ( 9 ). Each of the petals ( 121, 131 ) includes: a base ( 122, 132 ) solidly connected to an associated cheek ( 120, 130 ), side edges ( 123, 133 ), and an end ( 124, 134 ). The claw-pole rotor ( 2 ) is wherein each petal ( 121, 131 ) has a thickness (e) at the side edges ( 123, 133 ) which increases from the base ( 122, 132 ) to the end ( 124, 134 ).

First claim

The invention claimed is:

1. A claw rotor ( 202 ) for an electrical rotary machine having an axis of axial symmetry (X-X), comprising:
two magnet wheels ( 7 , 8 ) each comprising claws ( 9 ) and a flange supporting projections ( 19 ) extended by the claws ( 9 ) with axial orientation facing towards the flange of the other magnet wheel ( 8 , 7 );
a core interposed between the flanges of the magnet wheels ( 7 , 8 ); and
an insulator ( 211 ) of an excitation winding ( 10 ) fitted on the core;
the insulator ( 211 ) comprising a hub ( 110 ) fitted on the core, and a cheek ( 130 , 120 ) at each of the ends of the hub ( 110 ),
each cheek ( 120 , 130 ) supporting a plurality of projecting petals ( 221 , 231 ) which cooperate with the inclined inner periphery of the claw ( 9 ),
each of the petals ( 221 , 231 ) having a base ( 122 , 132 ) which is integral with the cheek ( 120 , 130 ), lateral edges ( 223 , 233 ) and a free end ( 224 , 234 ),
each petal ( 221 , 231 ) of the claw rotor ( 202 ) having a thickness (e) at the lateral edges ( 223 , 233 ) which increases continuously from the base ( 122 , 132 ) to the free end ( 224 , 234 ).

2. The claw rotor according to claim 1 , wherein the increase in the thickness (e) is progressive.

3. The claw rotor according to claim 1 , wherein the increase in the thickness (e) between the base ( 122 , 132 ) and the free end ( 224 , 234 ) of each of the petals ( 221 , 231 ) is between 10% and 50% of the thickness (e′) of the cheek.

4. The claw rotor according to claim 1 , wherein the thickness (e) at the base ( 122 , 132 ) of each of the petals ( 221 , 231 ) is equal to the thickness (e′) of the cheek ( 120 , 130 ).

5. The claw rotor according to claim 1 , wherein the thickness (e) at the base ( 122 , 132 ) of each of the petals ( 221 , 231 ) is equal to the thickness (e′) of the cheek ( 120 , 130 ) plus 10%.

6. The claw rotor according to claim 1 , further comprising at least one permanent magnet ( 38 ) which is fitted between two adjacent claws ( 9 ) belonging to one of the magnet wheels ( 7 , 8 ).

7. A rotary electrical machine, wherein the machine is equipped with a claw rotor ( 2 ) according to claim 1 .

8. The claw rotor according to claim 1 , wherein the increase in the thickness (e) between the base ( 122 , 132 ) and the free end ( 224 , 234 ) of each of the petals ( 221 , 231 ) is between 10% and 50% of the thickness (e′) of the cheek ( 120 , 130 ).

9. The claw rotor according to claim 2 , wherein the increase in the thickness (e) between the base ( 122 , 132 ) and the free end ( 224 , 234 ) of each of the petals ( 221 , 231 ) is between 10% and 50% of the thickness (e′) of the cheek ( 120 , 130 ).

10. The claw rotor according to claim 1 , wherein the thickness (e) of the base ( 122 , 132 ) of each of the petals ( 121 , 131 ) is equal to the thickness (e′) of the cheek ( 120 , 130 ).

11. The claw rotor according to claim 2 , wherein the thickness (e) of the base ( 122 , 132 ) of each of the petals ( 221 , 231 ) is equal to the thickness (e′) of the cheek ( 120 , 130 ).

12. The claw rotor according to claim 3 , wherein the thickness (e) at the base ( 122 , 132 ) of each of the petals ( 221 , 231 ) is equal to the thickness (e′) of the cheek ( 120 , 130 ).

13. A claw rotor ( 202 ) for an electrical rotary machine, comprising:
an axis of axial symmetry (X-X);
two magnet wheels ( 7 , 8 ) each comprising claws ( 9 ) and a flange supporting projections ( 19 ) extended by the claws ( 9 ) with axial orientation facing towards the flange of the other magnet wheel ( 8 , 7 );
a core interposed between the flanges of the magnet wheels ( 7 , 8 ); and
an insulator ( 211 ) of an excitation winding ( 10 ) fitted on the core;
the insulator ( 211 ) comprising a hub ( 110 ) fitted on the core, and a cheek ( 130 , 120 ) at each of the ends of the hub ( 110 ),
each cheek ( 120 , 130 ) supporting a plurality of projecting petals ( 221 , 231 ) which cooperate with the inclined inner periphery of the claw ( 9 ),
each of the petals ( 221 , 231 ) having a base ( 122 , 132 ) which is integral with the cheek ( 120 , 130 ), lateral edges ( 223 , 233 ) and a free end ( 224 , 234 ),
each petal ( 221 , 231 ) of the claw rotor ( 202 ) having a thickness (e) at the lateral edges ( 223 , 233 ) which increases from the base ( 122 , 132 ) to the free end ( 224 , 234 ),
the thickness (e) of each of the petals ( 221 , 231 ) increases from the base ( 122 , 132 ) to the free end ( 224 , 234 ) at any radial cross-section of the petal ( 221 , 231 ).

14. The claw rotor according to claim 13 , wherein the increase in the thickness (e) is continuous.

15. The claw rotor according to claim 13 , wherein the increase in the thickness (e) is progressive.

16. The claw rotor according to claim 2 , wherein the thickness (e) of the base ( 122 , 132 ) of each of the petals ( 221 , 231 ) is equal to the thickness (e′) of the cheek ( 120 , 130 ).

17. A claw rotor ( 202 ) for an electrical rotary machine, comprising:
an axis of axial symmetry (X-X);
two magnet wheels ( 7 , 8 ) each comprising claws ( 9 ) and a flange supporting projections ( 19 ) extended by the claws ( 9 ) with axial orientation facing towards the flange of the other magnet wheel ( 8 , 7 );
a core interposed between the flanges of the magnet wheels ( 7 , 8 ); and
an insulator ( 211 ) of an excitation winding ( 10 ) fitted on the core;
the insulator ( 211 ) comprising a hub ( 110 ) fitted on the core, and a cheek ( 130 , 120 ) at each of the ends of the hub ( 110 ),
each cheek ( 120 , 130 ) supporting a plurality of projecting petals ( 221 , 231 ) which cooperate with the inclined inner periphery of the claw ( 9 ),
each of the petals ( 221 , 231 ) having a base ( 122 , 132 ) which is integral with the cheek ( 120 , 130 ), lateral edges ( 223 , 233 ) and a free end ( 224 , 234 ),
each petal ( 221 , 231 ) of the claw rotor ( 202 ) having a thickness (e) at the lateral edges ( 223 , 233 ) which increases from the base ( 122 , 132 ) to the free end ( 224 , 234 ),
the thickness (e) of each of the petals ( 221 , 231 ) increases from the base ( 122 , 132 ) to the free end ( 224 , 234 ) at any radial cross-section of the petal ( 221 , 231 );
the increase in the thickness (e) between the base ( 122 , 132 ) and the free end ( 224 , 234 ) of each of the petals ( 221 , 231 ) is between 10% and 50% of the thickness (e′) of the cheek ( 120 , 130 ).

Assignees

• Valeo Equip Electr Moteur

Inventors

• Delianne Henri
• Margueritte David

Classifications

• H02K3/528 Primary

  of the claw-pole type · CPC title

• H02K21/044

  Rotor of the claw pole type · CPC title

• H02K1/27

  Rotor cores with permanent magnets · CPC title

• H02K3/325 Primary

  for windings on salient poles, such as claw-shaped poles · CPC title

• H02K1/226

  Electricity · mapped topic