Motor and resolver thereof
The invention relates to a motor and a resolver thereof. The resolver includes a resolver stator ( 70 ), a resolver rotor ( 80 ). The resolver includes ( 70 ) a plurality of resolver stator teeth ( 73 ) and resolver stator windings ( 75 ) wound around the resolver stator teeth ( 73 ). The resolver rotor ( 75 ) includes a resolver rotor core ( 81 ) received in a space surrounded by the resolver stator teeth ( 73 ) and capable of rotating around a shaft axis. The resolver stator windings ( 75 ) includes first output windings wound around each of the resolver stator teeth ( 73 ) by a first number of turns, second output windings wound around each of the resolver stator teeth by a second number of turns, and exciting windings wound around each resolver stator teeth by a third number of turns.
1. A resolver comprising:
a resolver stator comprising a plurality of resolver stator teeth and resolver stator windings wound around the resolver stator teeth;
a resolver rotor comprising a resolver rotor core received in a space surrounded by the resolver stator teeth and capable of rotating around a shaft axis;
wherein the resolver stator windings comprises:
a plurality of first output windings wound around each of the resolver stator teeth by a first number of turns;
a plurality of second output windings wound around each of the resolver stator teeth by a second number of turns; and
a plurality of exciting windings wound around each resolver stator teeth by a third number of turns;
wherein the resolver rotor core is in an annular shape, and the outer radius R at any one point of peripheral surface of the resolver rotor core meets:
R
=
R
s
-
a
b
+
sin
(
p
θ
)
wherein
,
a
=
[
2
+
2
(
R
s
-
R
max
)
R
max
-
R
min
]
(
R
s
-
R
max
)
b
=
1
+
2
R
s
-
R
max
R
max
-
R
min
R S is an inner radius of the resolver stator core,
R max is a maximum outer radius of the resolver rotor core,
R min is a minimum outer radius of the resolver rotor core,
θ is an angle position of the any one point; and
p is the number of pole pairs of the resolver rotor core.
2. The resolver according to claim 1 , wherein the third number of turns is less than the first number of turns and/or the second number of turns.
3. The resolver according to claim 1 , wherein the first number of turns is equal to the second number of turns.
4. The resolver according to claim 1 , wherein the exciting windings are wound on the resolver stator teeth in CW direction and CCW direction alternatively.
5. A motor, comprising:
a motor stator comprising a plurality of motor stator teeth and motor stator windings wound around the motor stator teeth;
a motor rotor rotatably mounted in the motor stator through a shaft; and
a resolver according to claim 1 , the resolver stator being mounted to the motor stator, the resolver rotor being fixed to the shaft.
6. The motor according to claim 5 , further comprising a shield fixed between the motor stator and the resolver for eliminating or weakening magnetic interference from the motor stator.
7. The motor according to claim 6 , wherein the shield comprises an tubular portion surrounding the resolver stator.
8. The motor according to claim 7 , wherein the tubular portion comprises a bottom having a through hole for the shaft to pass through.
9. The motor according to claim 8 , wherein the tubular portion has an opening end and a flange at the opening end; the flange is mounted to the motor stator.
10. The motor according to claim 9 , wherein the flange is provided with a mounting hole for a fastener to pass through to fix the shield onto to the motor stator.
11. A resolver comprising:
a resolver stator comprising a plurality of resolver stator teeth and resolver stator windings wound around the resolver stator teeth;
a resolver rotor comprising a resolver rotor core received in a space surrounded by the resolver stator teeth and capable of rotating around a shaft axis;
wherein the resolver stator windings comprises:
a plurality of first output windings wound around each of the resolver stator teeth by a first number of turns;
a plurality of second output windings wound around each of the resolver stator teeth by a second number of turns; and
a plurality of exciting windings wound around each resolver stator teeth by a third number of turns;
wherein:
the number of the resolver stator teeth is 2n, wherein n is an integer greater than 1;
the 2n resolver stator teeth are divided into n pairs of resolver stator teeth, each of the n pairs comprising two adjacent resolver stator teeth with first output windings wound thereon in a same direction;
for every two adjacent pairs of the n pairs, the first output windings are wound in opposite directions.
12. The resolver according to claim 11 , wherein: for the two resolver stator teeth of each pair of resolver stator teeth, the first output windings and the second output windings are wound on one resolver stator tooth in a same winding direction, the first output windings and the second output windings are wound on the other resolver stator tooth ( 73 ) in opposite winding directions respectively.
13. The resolver according to claim 11 , wherein: for every three adjacent resolver stator teeth, the second output windings are wound on two adjacent teeth of the three resolver stator teeth in a same winding direction, and wound on the rest resolver stator tooth in an opposite winding direction.