CN2640115Y - Direct drive mixed reluctance electric machine - Google Patents

Abstract

The utility model 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 utility model 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 utility model 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 utility model 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.

The content of the utility model: In order to overcome the shortcomings of the existing motors with small performance-to-volume ratio and large excitation power consumption, a motor with large performance-to-volume ratio and low excitation power consumption is provided. The utility model is realized through the following scheme: a direct drive hybrid reluctance motor, which includes a rotor core 2, an outer stator excitation winding 3, an inner stator excitation 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, and 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 holes uniformly distributed along the circumference. The tooth slots 15 parallel to the axis line are provided with the outer stator field winding 3 and the inner stator field winding 4 on the inner circle of the outer stator core 10 and the outer circle of the inner stator iron core 6 respectively. 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 utility model 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 utility model 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 drawings: Fig. 1 is a schematic structural view of the first embodiment of the utility model, Fig. 2 is a schematic cross-sectional view of A-A in Fig. 1, Fig. 3 is a schematic structural view of the second embodiment of the utility model, and Fig. 4 is a rotor core 2 in the first embodiment Schematic diagram of connection structure with permanent 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 (1)

1. 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 holding Frame (7), bearing (8), bearing (9), outer stator core (10), inner air gap (11) and outer air gap (12), rotor core (2) is made of silicon steel sheets, and rotor core An outer air gap (12) is formed between the outer circle of (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 iron core (6) are respectively provided with tooth slots (15) uniformly distributed along the circumference and parallel to the axis line, and the outer stator iron core (10) An outer stator field winding (3) and an inner stator field winding (4) are arranged on the inner circle and the outer circle of the inner stator core (6) respectively, the rotor cage (7) is made of non-magnetic material, and the rotor core (2) is made of The rotor cage (7) is supported, and the rotor cage (7) is fixed on the shaft (5). The shaft (5) is embedded in the inner hole of the inner stator core (6) through the bearing (8) and the bearing (9). It is characterized in that it also includes a permanent magnet (1), and 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 left-end cores (2 -1) and the right end iron core (2-2), the inner hole surface and the outer circular surface of the rotor iron core (2) are respectively provided with tooth grooves (13) uniformly distributed along the circumference and parallel to the axis line, and the left end iron core (2-2) -1) the tooth groove (13-1) and the tooth groove (13-2) on the right-end iron core (2-2) are staggered in the circumferential direction by 1/2 of the tooth groove pitch.

Images