CN1458733A - Directly driveng mixed reluctance motor - Google Patents

Abstract

The invention discloses a direct drive hybrid reluctance motor. It includes rotor core, outer stator excitation winding, inner stator excitation winding, shaft, inner stator core, rotor cage, bearing, outer stator core, inner air gap and outer air gap. The rotor core is made of silicon steel sheets. Including the permanent magnet, the annular permanent magnet filled with the magnetic field in the axial direction is arranged in the middle of the length direction of the rotor core and divides the rotor core into the left end iron core and the right end iron core. The cogging parallel to the axis line is evenly distributed along the circumference. Because the invention adopts the axially magnetized permanent magnet, the volume and weight of the motor are greatly reduced without reducing the output torque, and the excitation consumption is also reduced. The motor of the invention can be used not only as a motor but also as a generator, and has good application prospects in the fields of robots, numerical control machine tools and electric vehicles.

Description

Direct Drive Hybrid Reluctance Motor

Technical Field: The present invention relates to a motor, in particular to a direct-drive hybrid reluctance motor.

Background technology: the existing direct drive reluctance motor has a thin-walled cup-shaped rotor placed between two concentric stators. By sequentially energizing the poles, the rotor interacts with the stator to generate torque. This arrangement enables the inner and outer stators to interact with the rotor at the same time, increasing the torque per unit core mass. The magnetic flux passes through the thin-walled rotor cross-section radially from the outer stator to the inner stator. The rotor magnetic circuit is very short, and the magnetic resistance of the magnetic circuit is very low. The motor has high magnetic flux per ampere turn, and the motor has a high torque-to-power ratio. However, the stator and rotor of this motor do not use permanent magnet materials, so in order to obtain high power, a large excitation power is required, which not only limits the performance volume ratio of the motor, but also increases the cost of the drive system.

SUMMARY OF THE INVENTION: In order to overcome the defects of the prior art motors with small performance-to-volume ratio and large excitation power consumption, a motor with high performance-to-volume ratio and low excitation power consumption is provided. The present invention is realized through the following scheme: a direct drive hybrid reluctance motor, which includes a rotor core 2, an outer stator field winding 3, an inner stator field winding 4, a shaft 5, an inner stator core 6, and a rotor cage 7 , bearing 8, bearing 9, outer stator core 10, inner air gap 11 and outer air gap 12, the rotor core 2 is made of silicon steel sheets, and the outer circle of the rotor core 2 and the inner circle of the outer stator core 10 form an outer air gap 12. An inner air gap 11 is formed between the inner circle of the rotor core 2 and the outer circle of the inner stator core 6. The inner circle of the outer stator core 10 and the outer circle of the inner stator core 6, which are made of silicon steel sheets, are respectively provided with holes uniformly distributed along the circumference. The tooth slots 15 parallel to the axial line, the inner circle of the outer stator core 10 and the outer circle of the inner stator core 6 are respectively provided with an outer stator field winding 3 and an inner stator field winding 4 . The rotor cage 7 is a non-magnetic material, the rotor core 2 is supported by the rotor cage 7, the rotor cage 7 is fixed on the shaft 5, and the shaft 5 is embedded in the inner hole of the inner stator core 6 through the bearing 8 and the bearing 9. It also includes a permanent magnet 1, an annular permanent magnet 1 filled with a magnetic field in the axial direction is arranged in the middle of the length direction of the rotor core 2 and divides the rotor core 2 into a left end core 2-1 and a right end core 2-2, the rotor core The surface of the inner hole and the surface of the outer circle of 2 are respectively provided with tooth grooves 13 uniformly distributed along the circumference and parallel to the axis line, the tooth grooves 13-1 on the left end iron core 2-1 and the tooth grooves on the right end iron core 2-2 13-2 is staggered in the circumferential direction by 1/2 of the tooth space. The magnetic flux of the permanent magnet 1 passes through the left end iron core 2-1, the outer air gap 12, the outer stator core 10, the outer air gap 12 and the right end iron core 2-2, and then closes, and the other way passes through the left end iron core 2-1, the inner air gap 11. After the inner stator core 6, the inner air gap 11 and the right end iron core 2-2 are closed, the magnetic flux of the outer stator excitation winding 3 passes through the pole body 3-1, the outer air gap 12, the rotor core 2, the outer air gap 12, Adjacent pole bodies 3-2 and outer stator yoke 14 are closed. The magnetic flux of the inner stator excitation winding 4 is closed through the pole body 4 - 1 , the inner air gap 11 , the rotor core 2 , the inner air gap 11 , the adjacent pole body 4 - 2 and the inner stator yoke 18 . When each outer stator excitation winding 3 and inner stator excitation winding 4 are energized sequentially along the circumferential direction, a rotating magnetic field is established. Because the present invention adopts the axially magnetized permanent magnet 1, the volume and weight of the motor are greatly reduced without reducing the output torque, and the excitation consumption is also reduced. The motor of the invention can be used not only as a motor but also as a generator, and has good application prospects in the fields of robots, numerical control machine tools and electric vehicles.

Description of the drawings: Figure 1 is a schematic structural view of Embodiment 1 of the present invention, Figure 2 is a schematic cross-sectional view of A-A in Figure 1 , Figure 3 is a schematic structural view of Embodiment 2 of the present invention, and Figure 4 is a schematic view of the rotor core 2 and permanent Schematic diagram of the connection structure of magnet 1.

Specific Embodiment 1: The present embodiment will be specifically described below with reference to FIG. 1 , FIG. 2 and FIG. 4 . It consists of rotor core 2, outer stator field winding 3, inner stator field winding 4, shaft 5, inner stator core 6, rotor cage 7, bearing 8, bearing 9, outer stator core 10, inner air gap 11, outer air Gap 12 and permanent magnet 1 are formed, the annular permanent magnet 1 that axially is filled with magnetic field is arranged in the middle part of the length direction of rotor core 2 and divides rotor core 2 into left end iron core 2-1 and right end iron core 2-2, rotor The inner hole surface and the outer surface of the iron core 2 are respectively provided with tooth grooves 13 uniformly distributed along the circumference and parallel to the axis line, the tooth grooves 13-1 on the left end iron core 2-1 and the teeth on the right end iron core 2-2 The slots 13-2 are staggered by half the pitch of the tooth slots in the circumferential direction. The rotor core 2 is made of silicon steel sheets. An outer air gap 12 is formed between the outer circle of the rotor core 2 and the inner circle of the outer stator core 10, and an inner air gap 11 is formed between the inner circle of the rotor core 2 and the outer circle of the inner stator core 6. The inner circle of the outer stator core 10 made of silicon steel sheets and the outer circle of the inner stator core 6 are respectively provided with tooth grooves 15 uniformly distributed along the circumference and parallel to the axis line, and the inner circle of the outer stator core 10 and the outer circle of the inner stator core 6 The outer stator excitation winding 3 and the inner stator excitation winding 4 are respectively arranged on the circle. The rotor cage 7 is a non-magnetic material. The rotor core 2 and the permanent magnet 1 are supported by the rotor cage 7. The rotor cage 7 is fixed on the shaft 5. The shaft 5 is embedded in the inner stator core 6 through the bearing 8 and the bearing 9. in the hole.

Specific Embodiment 2: The present embodiment will be specifically described below with reference to FIG. 3 . The difference between this embodiment and the first embodiment is: the rotor 2 is no longer provided with a permanent magnet 1, and the annular permanent magnet 16 filled with a magnetic field in the axial direction is arranged in the middle of the length direction of the outer stator core 10 and the outer stator The iron core 10 is divided into a left iron core 10-1 and a right iron core 10-2, and an annular permanent magnet 17 filled with a magnetic field in the axial direction is arranged in the middle of the length direction of the inner stator iron core 6 and divides the inner stator iron core 6 into a left iron core 6-1 and right core 6-2. Other components and connections are the same as those in Embodiment 1. The magnetic flux of the permanent magnet 16 is closed after passing through the left iron core 10-1, the outer air gap 12, the left end iron core 2-1, the right end iron core 2-2, the outer air gap 12 and the right iron core 10-2, and the permanent magnet 17 The magnetic flux is closed after passing through the left iron core 6-1, the inner air gap 11, the left end iron core 2-1, the right end iron core 2-2, the inner air gap 11 and the right iron core 6-2.

Claims (2)

1, a kind of direct driving hybrid magnetoresistive motor, it comprises rotor core (2), external stator excitation winding (3), internal stator excitation winding (4), axle (5), internal stator iron core (6), rotor retainer (7), bearing (8), bearing (9), external stator core (10), interior air gap (11) and outer air gap (12), rotor core (2) is built up by silicon steel sheet, form outer air gap (12) in the cylindrical of rotor core (2) and the external stator iron core (10) between circle, air gap (11) in forming between the interior circle of rotor core (2) and internal stator iron core (6) cylindrical, have that be uniformly distributed along the circumference and teeth groove axis parallel (15) in the external stator iron core (10) that builds up by silicon steel sheet on circle and internal stator iron core (6) cylindrical, circle upward and on internal stator iron core (6) cylindrical is respectively arranged with external stator excitation winding (3) and internal stator excitation winding (4) in the external stator iron core (10), rotor retainer (7) is a non-magnet material, rotor core (2) is supported by rotor retainer (7), rotor retainer (7) is fixed on the axle (5), axle (5) is set in the endoporus of internal stator iron core (6) by bearing (8) and bearing (9), it is characterized in that it also comprises permanent magnet (1), the permanent magnet (1) that axially is filled with the annular in magnetic field be arranged on rotor core (2) length direction the middle part and rotor core (2) is divided into left end iron core (2-1) and right-hand member iron core (2-2), have that be uniformly distributed along the circumference and teeth groove axis parallel (13) on the bore area of rotor core (2) and the outer round surface, the teeth groove (13-1) on the left end iron core (2-1) and teeth groove (13-2) on the right-hand member iron core (2-2) 1/2nd the teeth groove spacings that stagger in a circumferential direction.

2, direct driving hybrid magnetoresistive motor according to claim 1, it is characterized in that no longer being provided with on the rotor (2) permanent magnet (1), the permanent magnet (16) that axially is filled with the annular in magnetic field be arranged on external stator iron core (10) length direction the middle part and external stator iron core (10) is divided into left side (10-1) and right side iron core (10-2) unshakable in one's determination, the middle part that the permanent magnet (17) that axially is filled with the annular in magnetic field is arranged on the length direction of internal stator iron core (6) also is divided into left side iron core (6-1) and the right iron core (6-2) to internal stator iron core (6).

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