CN212381004U

CN212381004U - Rare-earth permanent-magnet composite magnetic pole driving motor

Info

Publication number: CN212381004U
Application number: CN202020718135.2U
Authority: CN
Inventors: 高志东; 王磊; 张学义; 刘国栋; 张羽丰
Original assignee: Weifang Electric Machinery Factory Co ltd
Current assignee: Weifang Electric Machinery Factory Co ltd
Priority date: 2020-04-30
Filing date: 2020-04-30
Publication date: 2021-01-19
Anticipated expiration: 2030-04-30

Abstract

The utility model discloses a tombarthite permanent magnetism composite magnetic pole driving motor, including rotor core, casing, front end housing, rear end cap and axle, rotor core includes the first magnet of V type, second magnet and electricity excitation winding, and biradial permanent magnet rotor includes axle, first magnet, second magnet, rotor core, and the equipartition has the even number to the first rectangular channel that runs through rotor core thickness on rotor core, leans on interior one end to be equipped with the tile groove for rotor core diameter symmetry that runs through rotor core thickness every to first rectangular channel middle part. The V-shaped first magnet has magnetic gathering capacity, the second magnet can improve the distribution and strength of each air gap magnetic field and avoid the problem of permanent magnet material waste caused by a combined structure, the size of the air gap magnetic field can be adjusted by the electric excitation winding, permanent magnet steel is guaranteed not to lose magnetism, the magnetic field strength is large, and the output power is high.

Description

Rare-earth permanent-magnet composite magnetic pole driving motor

Technical Field

The utility model relates to an electric automobile motor electrical apparatus technical field, more specifically the utility model relates to a tombarthite permanent magnetism composite magnetic pole driving motor.

Background

The permanent magnet drive motor's that adopts on electric automobile at present rotor adopts the radial permanent magnet structure of multiple combination formula mostly, like prior art, patent name: built-in biradial permanent magnet steel synthetic magnetic field driving motor of electric automobile, patent number: 201710310325652.0 discloses following technical scheme, every utmost point includes two sets of radial permanent magnets, and every group permanent magnet all comprises two permanent magnet steel moreover, and multipolar permanent magnet evenly arranges along the rotor circumferencial direction and is close to the outer fringe side with rotor core, though improved the magnetic field intensity of motor, but also lead to the waste of permanent magnet steel material, increases motor cost, and the motor price/performance ratio reduces, consequently, utility model a motor rotor structure who improves the motor price/performance ratio has important meaning.

SUMMERY OF THE UTILITY MODEL

The utility model relates to a developed a tombarthite permanent magnet compound magnetic pole driving motor, permanent magnet embedded in permanent magnet rotor iron core, every magnetic field is by combination radial magnetic field and pure radial constitution, reduces the quantity of permanent magnet when can improving the motor field intensity, reaches the purpose that improves the motor price/performance ratio.

A tombarthite permanent magnetism compound magnetic pole driving motor, including front end housing, rear end housing, casing, mixed excitation rotor, stator, motor casing is constituteed to front end housing, rear end housing, casing, is equipped with mixed excitation rotor, stator in the motor casing, mixed excitation rotor includes claw utmost point electric excitation rotor and the biradial permanent magnet rotor of no carbon brush sliding ring structure.

Preferably, biradial permanent magnet rotor includes the axle, first magnet, the second magnet, rotor core, the equipartition has the even number to the first rectangular channel that runs through rotor core thickness on the rotor core, lean on interior one end to be equipped with the tile shape groove for rotor core diameter symmetry that runs through rotor core thickness every to first rectangular channel middle part, first magnet is laid in first rectangular channel according to the mode of a pair of first magnet N utmost point to the N utmost point, adjacent a pair of S utmost point to the S utmost point in proper order, the second magnet is laid in the tile shape inslot according to the mode of second magnet and the first magnet N utmost point of both sides to the N utmost point, S utmost point to the S utmost point.

Preferably, the thickness of the second magnet in the magnetizing direction is smaller than the thickness of the first magnet in the magnetizing direction.

Preferably, each pair of first rectangular grooves is symmetrical relative to the diameter of the rotor core, the cross section area is inverted 'splayed', every two pairs of adjacent first rectangular grooves are parallel relative to the diameter of the rotor core, the middle points of the inner sides of the first rectangular grooves are on the same circumference, the outer ends of the first rectangular grooves are not communicated with the edge of the rotor core, the tile-shaped grooves are concave towards one side of the excircle of the rotor core, and the minimum distance between the outer edges of the tile-shaped grooves and the inner ends of the first rectangular grooves on the two sides is 1.5 mm.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses magnetic field in the driving motor air gap is provided by the first magnet of V type, second magnet and electric excitation winding jointly, and the first magnet of V type has and gathers magnetic capacity, and the second magnet can avoid the extravagant problem of permanent magnetic material that combined type structure arouses again when improving every utmost point air gap magnetic field distribution and intensity, guarantees that permanent magnetic steel does not lose magnetism, and magnetic field intensity is big, and output is high.

Drawings

Fig. 1 is a schematic sectional structure view of a driving motor of the present invention;

fig. 2 is a schematic cross-sectional structural view of the permanent magnet rotor of the present invention;

in the figure: 1. a shaft; 2. a front end cover; 3. a first magnet; 4. a second magnet; 5. a housing; 6. a stator; 7. a rotor core; 8. and a rear end cap.

Detailed Description

Example 1

As shown in fig. 1-2, including front end housing 2, rear end cap 8, casing 5, mixed excitation rotor, stator 6, front end housing 2, rear end cap 8, casing 5 constitute motor casing, be equipped with mixed excitation rotor, stator 6 in the motor casing, mixed excitation rotor includes claw utmost point electric excitation rotor and the biradial permanent magnet rotor of no carbon brush sliding ring structure.

The biradial permanent magnet rotor consists of a shaft 1, a first magnet 3, a second magnet 4 and a rotor iron core 7, wherein even number of pairs of first rectangular grooves penetrating through the thickness of the rotor iron core 7 are uniformly distributed on the rotor iron core 7, each pair of first rectangular grooves are symmetrical relative to the diameter of the rotor iron core 7, the cross section area is in an inverted V shape, every two pairs of adjacent first rectangular grooves are parallel relative to the diameter of the rotor iron core 7, the middle points of the inner edges of the first rectangular grooves are on the same circumference, the outer ends of the first rectangular grooves are not communicated with the edge of the rotor iron core 7, one end, close to the inner end, of the middle part of each pair of first rectangular grooves is provided with a tile-shaped groove penetrating through the thickness of the rotor iron core 7 and symmetrical relative to the diameter of the rotor iron core 7, the tile-shaped groove is concave to one;

the first magnets 3 are sequentially placed in the first rectangular groove in a mode that a pair of first magnets 3 are N-pole to N-pole and an adjacent pair of S-pole to S-pole, and the second magnets 4 are placed in the tile-shaped groove in a mode that the second magnets 4 and the first magnets 3 on the two sides are N-pole to N-pole and S-pole to S-pole;

the thickness of the second magnet 4 in the magnetizing direction is smaller than that of the first magnet 3 in the magnetizing direction.

The working principle is as follows:

when the driving motor is fed with three-phase alternating current which is subjected to pulse width modulation by the three-phase inverter, the stator of the driving motor generates a space rotating magnetic field, the space rotating magnetic field interacts with the magnetic field generated by the rotor, and the rotor generates rotating torque which is consistent with the rotating magnetic field direction of the stator winding, so that the rotor of the driving motor rotates, and the electric automobile is driven to run.

Claims

1. The rare earth permanent magnet composite magnetic pole driving motor is characterized by comprising a front end cover (2), a rear end cover (8), a shell (5), a hybrid excitation rotor and a stator (6), wherein the front end cover (2), the rear end cover (8) and the shell (5) form a motor shell, the hybrid excitation rotor and the stator (6) are arranged in the motor shell, and the hybrid excitation rotor comprises a claw pole electric excitation rotor and a double-radial permanent magnet rotor of a carbon-brush-free slip ring structure; biradial permanent magnet rotor includes axle (1), first magnet (3), second magnet (4), rotor core (7), the equipartition has the even number to the first rectangular channel that runs through rotor core (7) thickness on rotor core (7), lean on interior one end to be equipped with the tile shape groove for rotor core (7) diameter symmetry that runs through rotor core (7) thickness every to first rectangular channel middle part, first magnet (3) are according to a pair of first magnet (3) N utmost point to the N utmost point, the mode of adjacent a pair of S utmost point to the S utmost point is laid in first rectangular channel in proper order, second magnet (4) are laid in the tile shape inslot according to second magnet (4) and both sides first magnet (3) N utmost point to the N utmost point, the mode of S utmost point to the S utmost point.

2. A rare earth permanent magnet compound pole driving motor according to claim 1, wherein the second magnet (4) has a smaller thickness in the magnetizing direction than the first magnet (3).

3. The rare earth permanent magnet composite magnetic pole driving motor according to claim 2, wherein each pair of the first rectangular grooves is symmetrical with respect to the diameter of the rotor core (7), the cross-sectional area is in an inverted "eight" shape, each two pairs of adjacent first rectangular grooves are parallel with respect to the diameter of the rotor core (7), the inner center points of the first rectangular grooves are on the same circumference, the outer ends of the first rectangular grooves are not communicated with the edge of the rotor core (7), the tile-shaped grooves are recessed toward the outer circumferential side of the rotor core (7), and the minimum distance between the outer edges of the tile-shaped grooves and the inner ends of the first rectangular grooves on both sides is 1.5 mm.