Winding technique for minimizing voltage stress in a motor

1. A method for winding a stator of a motor, wherein the stator includes n teeth, wherein n is greater than or equal to 18, and wherein the motor has m phases, the method comprising:

winding a wire around a first tooth of the stator;

winding the wire around a second tooth of the stator such that a first portion of the wire extends from the first tooth to the second tooth, wherein the second tooth is

(

n

2

⁢

m

-

1

)

teeth from the first tooth;

winding the wire around a third tooth of the stator such that a second portion of the wire extends from the second tooth to the third tooth, wherein the third tooth is

[

(

m

-

1

)

*

(

n

2

⁢

m

)

]

+

1

teeth from the second tooth;

winding the wire around a fourth tooth of the stator such that a third portion of the wire extends from the third tooth to the fourth tooth, wherein the fourth tooth is

(

n

2

⁢

m

-

1

)

teeth from the third tooth; and

winding the wire around a fifth tooth of the stator such that a fourth portion of the wire extends from the fourth tooth to the fifth tooth, wherein the fifth tooth is

[

(

m

-

1

)

*

(

n

2

⁢

m

)

]

+

2

teeth from the fourth tooth, wherein

n

2

⁢

m

teeth including at least the first tooth, the second tooth, and the fifth tooth are positioned on a first side of the stator, and wherein

n

2

⁢

m

teeth including at least the third tooth and the fourth tooth are positioned on a second side of the stator opposing the first side.

2. The method of claim 1 , further comprising:

winding the wire around a sixth tooth of the stator such that a fifth portion of the wire extends from the fifth tooth to the sixth tooth, wherein the sixth tooth is nine teeth from the fifth tooth.

3. The method of claim 1 , further comprising:

winding the wire around a sixth tooth of the stator such that a fifth portion of the wire extends from the fifth tooth to the sixth tooth, wherein the sixth tooth is one tooth from the fifth tooth;

winding the wire around a seventh tooth of the stator such that a sixth portion of the wire extends from the sixth tooth to the seventh tooth, wherein the seventh tooth is eleven teeth from the sixth tooth; and

winding the wire around an eighth tooth of the stator such that a seventh portion of the wire extends from the seventh tooth to the eighth tooth, wherein the eighth tooth is one tooth from the seventh tooth.

4. The method of claim 1 , further comprising:

winding the wire around a sixth tooth of the stator such that a fifth portion of the wire extends from the fifth tooth to the sixth tooth, wherein the sixth tooth is two teeth from the fifth tooth;

winding the wire around a seventh tooth of the stator such that a sixth portion of the wire extends from the sixth tooth to the seventh tooth, wherein the seventh tooth is thirteen teeth from the sixth tooth;

winding the wire around an eighth tooth of the stator such that a seventh portion of the wire extends from the seventh tooth to the eighth tooth, wherein the eighth tooth is two teeth from the seventh tooth;

winding the wire around a ninth tooth of the stator such that an eighth portion of the wire extends from the eighth tooth to the ninth tooth, wherein the ninth tooth is fourteen teeth from the eighth tooth; and

winding the wire around a tenth tooth of the stator such that a ninth portion of the wire extends from the ninth tooth to the tenth tooth, wherein the tenth tooth is fifteen teeth from the ninth tooth.

5. The method of claim 1 , further comprising:

winding the wire around a sixth tooth of the stator such that a fifth portion of the wire extends from the fifth tooth to the sixth tooth, wherein the sixth tooth is fifteen teeth from the fifth tooth.

6. The method of claim 1 , wherein the wire wound around the first tooth, the second tooth, the third tooth, the fourth tooth, and the fifth tooth comprise a first phase of a plurality of phases, the method further comprising winding at least one additional phase of the plurality of phases in a manner similar to the first phase.

7. The method of claim 6 , wherein the plurality of phases comprises three phases.

8. The method of claim 6 , wherein the plurality of phases comprises five phases.

9. A motor having m phases, the motor comprising:

a rotor;

a stator defining n teeth, wherein n is greater than or equal to 18;

a wire wound around a first tooth of the stator to create a first coil;

a second coil wound around a second tooth of the stator such that a first portion of the wire extends from the first tooth to the second tooth, wherein the second tooth is

(

n

2

⁢

m

-

1

)

teeth from the first tooth;

a third coil wound around a third tooth of the stator such that a second portion of the wire extends from the second tooth to the third tooth, wherein the third tooth is

[

(

m

-

1

)

*

(

n

2

⁢

m

)

]

+

1

teeth from the second tooth;

a fourth coil wound around a fourth tooth of the stator such that a third portion of the wire extends from the third tooth to the fourth tooth, wherein the fourth tooth is

(

n

2

⁢

m

-

1

)

teeth from the third tooth; and

a fifth coil wound around a fifth tooth of the stator such that a fourth portion of the wire extends from the fourth tooth to the fifth tooth, wherein the fifth tooth is

[

(

m

-

1

)

*

(

n

2

⁢

m

)

]

+

2

teeth from the fourth tooth, wherein n/2m teeth including at least the first tooth, the second tooth, and the fifth tooth are positioned on a first side of the stator, and wherein n/2m teeth including at least the third tooth and the fourth tooth are positioned on a second side of the stator opposing the first side.

10. The motor of claim 9 , further comprising:

a sixth coil wound around a sixth tooth of the stator such that a fifth portion of the wire extends from the fifth tooth to the sixth tooth, wherein the sixth tooth is nine teeth from the fifth tooth.

11. The motor of claim 9 , further comprising:

a sixth coil portion wound around a sixth tooth of the stator such that a fifth portion of the wire extends from the fifth tooth to the sixth tooth, wherein the sixth tooth is one tooth from the fifth tooth;

a seventh coil wound around a seventh tooth of the stator such that a sixth portion of the wire extends from the sixth tooth to the seventh tooth, wherein the seventh tooth is eleven teeth from the sixth tooth; and

an eighth coil wound around an eighth tooth of the stator such that a seventh portion of the wire extends from the seventh tooth to the eighth tooth, wherein the eighth tooth is one tooth from the seventh tooth.

12. The motor of claim 9 , further comprising:

a sixth coil wound around a sixth tooth of the stator such that a fifth portion of the wire extends from the fifth tooth to the sixth tooth, wherein the sixth tooth is two teeth from the fifth tooth;

a seventh coil wound around a seventh tooth of the stator such that a sixth portion of the wire extends from the sixth tooth to the seventh tooth, wherein the seventh tooth is thirteen teeth from the sixth tooth;

an eighth coil wound around an eighth tooth of the stator such that a seventh portion of the wire extends from the seventh tooth to the eighth tooth, wherein the eighth tooth is two teeth from the seventh tooth;

a ninth coil wound around an ninth tooth of the stator such that an eighth portion of the wire extends from the eighth tooth to the ninth tooth, wherein the ninth tooth is fourteen teeth from the eighth tooth; and

a tenth coil wound around an tenth tooth of the stator such that a ninth portion of the wire extends from the ninth tooth to the tenth tooth, wherein the tenth tooth is fifteen teeth from the ninth tooth.

13. The motor of claim 9 , further comprising:

a sixth coil wound around a sixth tooth of the stator such that a fifth portion of the wire extends from the fifth tooth to the sixth tooth, wherein the sixth tooth is fifteen teeth from the fifth tooth.

14. The motor of claim 9 , wherein the wire wound around the first tooth, the second tooth, the third tooth, the fourth tooth, and the fifth tooth comprise a first phase of a plurality of phases, the method further comprising winding at least one additional phase of the plurality of phases in a manner similar to the first phase.

15. The motor of claim 14 , wherein the plurality of phases comprises three phases.

16. The motor of claim 14 , wherein the plurality of phases comprises five phases.

17. A method for winding a stator of a motor, wherein the stator includes n teeth, wherein n is greater than or equal to 18, and wherein the motor has m phases, the method comprising:

winding a first winding wire around a first set of teeth of the stator to create a first set of coils using the method of claim 1 , wherein a first voltage (V 1 ) is applied to the first winding wire such that the first voltage is applied to the first set of coils, and wherein the first winding wire is wound around the first set of teeth such that a voltage difference between adjacent coils does not exceed

5

*

V

1

(

n

⁢

/

⁢

m

)

;

winding a second winding wire around a second set of teeth of the stator to create a second set of coils using the method of claim 1 , wherein a second voltage is applied to the second winding wire such that the second voltage is applied to the second set of coils, and wherein the second winding wire is wound around the second set of teeth such that a voltage difference between adjacent coils does not exceed

5

*

V

1

(

n

⁢

/

⁢

m

)

;

and

winding a third winding wire around a third set of teeth of the stator to create a third set of coils using the method of claim 1 , wherein a third voltage is applied to the third winding wire such that the third voltage is applied to the third set of coils, and wherein the third winding wire is wound around the third set of teeth such that a voltage difference between adjacent coils does not exceed

5

*

V

1

(

n

⁢

/

⁢

m

)

.

18. The method of claim 17 , wherein each of the first set of coils are electrically connected in series, each of the second set of coils are electrically connected in series, and each of the third set of coils are electrically connected in series, and wherein each set of coils are evenly spaced within the stator.

19. The method of claim 17 , wherein the first winding wire wound around the first set of teeth comprises a first phase of the motor, wherein the second winding wire wound around the second set of teeth comprises a second phase of the motor, and wherein the third winding wire wound around the third set of teeth comprises a third phase of the motor.

20. The method of claim 17 , wherein the first voltage, the second voltage, and the third voltage are equivalent in magnitude.