Motor stator assembly, motor and electric vehicle having the same
The utility model discloses a motor stator assembly, a motor and an electric vehicle having the motor. The motor stator assembly comprises a stator iron core and at least two sets of symmetrical three-phase windings, which are arranged to wind the stator iron core respectively, wherein phase differences among three phases Ui, Vi and Wi of each set of the three-phase windings are a 120° electrical angle, and i is the set number of the three-phase windings. In order to address the problem of high output power of drive system, the motor stator assembly uses two sets of three-phase windings having a symmetrical spatial arrangement, and each set of windings is considered as an independent unit and is controlled via a power device respectively; finally, the output powers are superimposed so that the capacity of the inverter is increased while also avoiding problems of equalized current and over-voltage.
1. A motor stator assembly, characterized by comprising:
a stator iron core; and
at least two sets of symmetrical three-phase windings, which are arranged to wind the stator iron core respectively,
wherein phase differences among three phases Ui, Vi and Wi of each set of the three-phase windings are a 120° electrical angle, and i is the set number of the three-phase windings;
wherein with respect to two sets of three-phase windings, a phase difference between the same phases of a first set of three-phase windings and a second set of three-phase windings is a 180° electrical angle;
wherein the stator iron core has 48 stator slots, and the number of poles is 4; and each phase of the individual three-phase windings occupies 2 stator slots;
wherein a stator slot span of each phase itself in the three-phase windings is 9 and 11, and the numbers of coil turns in individual stator slots are the same;
wherein each phase of Ui, Vi and Wi comprises two parallel branches;
a first parallel branch of U 1 phase of the first set of three-phase windings is formed by winding a coil along stator slots 1 - 40 - 2 - 39 , and a second parallel branch of U 1 phase of the first set of three-phase windings is formed by winding a coil along stator slots 25 - 14 - 26 - 15 ;
a first parallel branch of V 1 phase of the first set of three-phase windings is formed by winding a coil along stator slots 9 - 48 - 10 - 47 , and a second parallel branch of V 1 phase of the first set of three-phase windings is formed by winding a coil along stator slots 33 - 24 - 34 - 23 ;
a first parallel branch of W 1 phase of the first set of three-phase windings is formed by winding a coil along stator slots 17 - 8 - 18 - 7 , and a second parallel branch of W 1 phase of the first set of three-phase windings is formed by winding a coil along stator slots 41 - 32 - 42 - 31 ;
a first parallel branch of U 2 phase of the second set of three-phase windings is formed by winding a coil along stator slots 4 - 13 - 3 - 14 , and a second parallel branch of U 2 phase of the second set of three-phase windings is formed by winding a coil along stator slots 28 - 37 - 27 - 38 ;
a first parallel branch of V 2 phase of the second set of three-phase windings is formed by winding a coil along stator slot 12 - 21 - 11 - 22 , and a second parallel branch of V 2 phase of the second set of three-phase windings is formed by winding a coil along stator slots 36 - 45 - 35 - 46 ;
a first parallel branch of W 2 phase of the second set of three-phase windings is formed by winding a coil along stator slots 20 - 29 - 19 - 30 , and a second parallel branch of W 2 phase of the second set of three-phase windings is formed by winding a coil along stator slots 44 - 5 - 43 - 6 ;
wherein stator slots 1 to 48 represent 48 stator slots disposed in sequence.
2. The motor stator assembly according to claim 1 , wherein a neutral point of the coil of U 1 phase of the first set of three-phase windings is lead out along stator slots 39 and 15 ; a neutral point of the coil of V 1 phase of the first set of three-phase windings is lead out along stator slots 47 and 23 ; a neutral point of the coil of W 1 phase of the first set of three-phase windings is lead out along stator slots 7 and 31 ; a neutral point of the coil of U 2 phase of the second set of three-phase windings is lead out along stator slots 14 and 38 ; a neutral point of the coil of V 2 phase of the second set of three-phase windings is lead out along stator slots 22 and 46 ; a neutral point of the coil of W 2 phase of the second set of three-phase windings is lead out along stator slots 30 and 6 .
3. The motor stator assembly according to claim 2 , wherein the neutral points of the coils of individual phases of individual three-phase windings are independent from each other, and magnetic circuits of individual three-phase windings are independent from each other.
4. The motor stator assembly according to claim 1 , wherein a terminal of the coil of U 1 phase of the first set of three-phase windings is lead out along stator slots 1 and 25 ; a terminal of the coil of V 1 phase of the first set of three-phase windings is lead out along stator slots 9 and 33 ; a terminal of the coil of W 1 phase of the first set of three-phase windings is lead out along stator slots 7 and 41 ; a terminal of the coil of U 2 phase of the second set of three-phase windings is lead out along stator slots 4 and 28 ; a terminal of the coil of V 2 phase of the second set of three-phase windings is lead out along stator slots 12 and 36 ; a terminal of the coil of W 2 phase of the second set of three-phase windings is lead out along stator slots 20 and 44 .
5. The motor stator assembly according to claim 1 , wherein the three-phase windings are single-layer concentric windings.
6. The motor stator assembly according to claim 1 , wherein the slot space factors of individual stator slots of the stator iron core are the same.
7. The motor stator assembly according to claim 1 , wherein the windings of individual phases of each of the three-phase windings have identical resistance and inductance.
8. The motor stator assembly according to claim 1 , wherein each of the three-phase windings is independently controlled by IGBT power devices having a corresponding number.
9. A motor characterized by comprising a motor stator assembly according to claim 1 .
10. A motor characterized by comprising a motor according to claim 9 .
11. The motor stator assembly according to claim 1 , wherein the three-phase windings are single-layer concentric windings.
12. The motor stator assembly according to claim 1 , wherein the slot space factors of individual stator slots of the stator iron core are the same.
13. The motor stator assembly according to claim 1 , wherein the windings of individual phases of each of the three-phase windings have identical resistance and inductance.
14. The motor stator assembly according to claim 1 , wherein each of the three-phase windings is independently controlled by IGBT power devices having a corresponding number.
15. A motor characterized by comprising a motor stator assembly according to claim 1 .