CN205489867U - Radial permanent magnetism self -starting electric motor rotor - Google Patents

Abstract

Spoke type permanent magnet self-starting motor rotor, the motor rotor is sleeved on the motor rotor shaft, including the rotor body, permanent magnets and rotor guide bars. The rotor body is provided with a number of motor rotor slots distributed along its circumference, and the rotor guide bars It is located in the rotor slot of the motor; the rotor body is provided with multiple permanent magnet slots, and the permanent magnets are located in the permanent magnet slots; the rotor body is composed of multiple layers of the same motor rotor laminations coaxially laminated in the same arrangement. The rotor body is provided with a plurality of high-strength steel wires, the high-strength steel wires are located between the adjacent motor rotor laminations, and the high-strength steel wires run through the permanent magnet slots, and each permanent magnet slot is aligned in the axial direction of the motor rotor shaft. The distance between adjacent high-strength steel wires is less than the thickness of 10 motor rotor laminations, each permanent magnet slot is respectively connected with two different motor rotor slots, and the permanent magnet does not contact the rotor bar.

Description

Spoke type permanent magnet self-starting motor rotor

technical field

The utility model relates to the field of motors, in particular to a motor rotor.

Background technique

The self-starting permanent magnet synchronous motor has the advantages of high power factor, constant speed, small size, light weight, high efficiency, etc. It has a wide application prospect. According to the relationship between the magnetization direction of the permanent magnet and the rotation direction of the rotor, the built-in rotor magnetic circuit structure can be divided into three types: radial type, tangential type and hybrid type. For the built-in radial rotor magnetic circuit structure with a V-shaped permanent magnet groove, in order to limit the leakage flux of the permanent magnet, the width of the rotor magnetic isolation bridge is designed to be small, and increasing the reluctance of this part can limit the leakage flux. . However, due to the large torque of the permanent magnet motor rotor and the small width of the magnetic isolation bridge, it is easy to cause the tooth yoke of the permanent magnet motor rotor to be torn or twisted, and the self-starting permanent magnet motor rotor is damaged or scrapped.

Utility model content

Aiming at the defects in the prior art, the utility model provides a spoke-type permanent magnet self-starting motor rotor, which reduces the leakage flux of the permanent magnet, improves the electromagnetic performance, and meanwhile has good mechanical performance and long service life.

The specific technical solution is: the spoke type permanent magnet self-starting motor rotor, the motor rotor is sleeved on the motor rotor shaft, including the rotor body, permanent magnets and rotor guide bars, and the rotor body is provided with a plurality of motor rotors distributed along its circumference The rotor guide bar is set in the motor rotor slot; the rotor body is provided with a plurality of permanent magnet slots, and the permanent magnets are set in the permanent magnet slot; the rotor body is composed of multiple layers of the same motor rotor laminations in the same arrangement. The rotor body is composed of multiple high-strength steel wires, the high-strength steel wires are located between the adjacent motor rotor laminations, and the high-strength steel wires run through the permanent magnet slots, and each in the axial direction of the motor rotor shaft The distance between adjacent high-strength steel wires in the permanent magnet slots is less than the thickness of 10 motor rotor laminations, each permanent magnet slot is connected to two different motor rotor slots, and the permanent magnets are not in contact with the rotor bars.

The motor rotor laminations include a motor outer unit part and a motor rotor yoke part, the motor outer unit part is distributed around the motor rotor yoke part in a circumferential direction, the motor rotor yoke part is sleeved on the motor rotor shaft, and the permanent magnet slot is located in the motor In the gap between the outer unit part and the motor rotor yoke part, fastening screw holes are arranged on the motor outer unit part and the motor rotor yoke part.

The number of fastening screw holes on the outer unit part of the motor is two.

The rotor body is composed of multi-layer motor rotor laminations connected by fastening bolts passing through fastening screw holes.

The width of the permanent magnet slot is the same as the width of the bottom of the motor rotor slot.

The utility model has simple structure and low manufacturing cost.

Each permanent magnet slot is connected with two different rotor slots of the motor, and the permanent magnets are not in contact with the rotor bars, realizing air magnetic isolation, and its ability to limit leakage flux is far greater than that of conventional rotor magnetic isolation bridges. Magnetic flux capacity, thereby improving the electromagnetic performance; there are multiple high-strength steel wires in the rotor body, the high-strength steel wires are located between the adjacent motor rotor laminations, and the high-strength steel wires run through the permanent magnet slots, and pass through the multi-layer motor rotor laminations. After the press is molded, the high-strength steel wire can act as a "spoke" to fix the outer unit of the motor and the yoke of the motor rotor. The high-strength steel wire has high strength and good mechanical properties. At the same time, the processing method of the permanent magnet In order to inject permanent magnet powder into the permanent magnet groove and sinter it, and then magnetize it, this processing method can make the permanent magnet powder play the role of "binder" to further fix the outer unit part of the motor and the rotor yoke part of the motor The connection, through the joint action of high-strength steel wire and permanent magnet, connects and tightens the outer unit part of the motor and the yoke part of the rotor of the motor, so that the device has good mechanical properties and improves the service life of the device.

Description of drawings

Fig. 1 is the schematic diagram of existing motor rotor structure;

Fig. 2 is a structural representation of the utility model;

Fig. 3 is a schematic diagram of the laminated structure of the motor rotor of the utility model.

detailed description

As shown in Figure 1, the smaller the magnetic isolation bridge 1 of the traditional motor (less than 1mm), the magnetic flux leakage of the permanent magnet can be reduced and the performance of the motor can be improved; however, the smaller the magnetic isolation bridge 1 of the motor, the lower the mechanical strength of the motor rotor, and it is even impossible To meet the mechanical strength requirements of the motor, on the other hand, the magnetic isolation bridge 1 is small, and the scrap rate of the motor rotor lamination processing increases.

As shown in Figures 2 and 3, the spoke-type permanent magnet self-starting motor rotor, the motor rotor is sleeved on the motor rotor shaft 2, including the rotor body 3, the permanent magnet 4 and the rotor guide bar 5, and the rotor body 3 is provided with multiple A motor rotor groove 6 distributed along its circumferential direction, the rotor guide bar 5 is arranged in the motor rotor groove 6; the rotor body 3 is provided with a plurality of permanent magnet grooves 7, and the permanent magnet 4 is arranged in the permanent magnet groove 7; the rotor body 3. It consists of multiple layers of the same motor rotor laminations coaxially stacked in the same arrangement. The rotor body 3 is provided with multiple high-strength steel wires 8, and the high-strength steel wires 8 are located between adjacent motor rotor laminations. , and the high-strength steel wire 8 runs through the permanent magnet slot 7, the high-strength steel wire 8 is perpendicular to the motor rotor shaft 2, and the distance between adjacent high-strength steel wires 8 in each permanent magnet slot 7 in the axial direction of the motor rotor shaft 2 is less than The thickness of 10 motor rotor laminations, each permanent magnet slot 7 penetrates with two different motor rotor slots 6 respectively, and the permanent magnet 4 is not in contact with the rotor bar 5 .

The motor rotor laminations include motor outer unit parts 9 and motor rotor yoke parts 10, the motor outer unit parts 9 are circumferentially distributed around the motor rotor yoke part 10, and the motor rotor yoke part 10 is sheathed on the motor rotor shaft 2, permanently The magnet slot 7 is located in the gap between the motor outer unit part 9 and the motor rotor yoke part 10 , and both the motor outer unit part 9 and the motor rotor yoke part 10 are provided with fastening screw holes 11 .

The rotor body 3 is composed of multi-layer motor rotor laminations connected by fastening bolts 12 passing through the fastening screw holes 11. The number of fastening screw holes 11 on the motor outer unit part 9 is two, so that the distance between the motor rotor laminations The connection is tighter; the width of the permanent magnet slot 7 is the same as the width of the bottom of the motor rotor slot 6.

The processing method of the spoke type permanent magnet self-starting motor rotor includes the spoke type permanent magnet self-starting motor rotor described in the above claims, and also includes the following steps: stamping the silicon steel sheet according to the specification and size of the motor rotor lamination; The formed motor rotor laminations are coaxially stacked layer by layer in the same arrangement until the design number of layers is reached. At the same time, high-strength steel wires 8 are placed between adjacent motor rotor laminations and the high-strength steel wires 8 runs through the permanent magnet slot 7, and the distance between adjacent high-strength steel wires 8 in each permanent magnet slot 7 in the axial direction of the motor rotor shaft 2 is less than the thickness of 10 motor rotor laminations; The multi-layer motor rotor laminations are molded with a press in the axial direction of the motor rotor shaft 2 to form the rotor body 3, and the fastening bolts 12 are used to penetrate the fastening screw holes 11 to form the multilayer motor rotor that has been molded by the press. The laminations are connected, and the motor rotor shaft 2 is installed into the rotor body 3 at the same time; then the permanent magnet 4 powder is injected into the permanent magnet slot 7 of the rotor body 3 and sintered; then the motor rotor slot 6 of the rotor body 3 is sintered. The rotor bar 5 is formed by casting aluminum; finally, the permanent magnet 4 in the rotor body 3 is magnetized.

Each permanent magnet slot 7 is connected with two different motor rotor slots 6 respectively, and the permanent magnet 4 is not in contact with the rotor guide bar 5, realizing air magnetic isolation, and its ability to limit magnetic flux leakage is far greater than that of conventional rotor magnetic isolation The ability of the bridge to limit the leakage flux, thereby improving the electromagnetic performance; the rotor body 3 is provided with a plurality of high-strength steel wires 8, the high-strength steel wires 8 are located between the adjacent motor rotor laminations, and the high-strength steel wires 8 run through the permanent magnet slot 7 , after the multi-layer motor rotor laminations are molded by a press, the high-strength steel wire 8 can play the role of "spoke", and the motor outer unit part 9 and the motor rotor yoke part 10 are fixedly connected, and the high-strength steel wire 8 It has high strength and good mechanical properties. At the same time, the processing method of the permanent magnet 4 is to inject the permanent magnet 4 powder into the permanent magnet slot 7 and sinter it, and then magnetize it. This processing method can make the permanent magnet 4 powder act as a "binder". ", the motor outer unit part 9 and the motor rotor yoke part 10 are further fixedly connected, and through the joint action of the high-strength steel wire 8 and the permanent magnet 4, the motor outer unit part 9 and the motor rotor yoke part 10 are connected and fastened , so that the device has good mechanical properties and improves the service life of the device.

Claims (5)

1. Spoke type permanent magnet self-starting motor rotor. The motor rotor is sleeved on the motor rotor shaft, including the rotor body, permanent magnets and rotor guide bars. The rotor body is provided with a plurality of motor rotor slots distributed along its circumference. The rotor The guide bars are set in the rotor slot of the motor; the rotor body is provided with multiple permanent magnet slots, and the permanent magnets are set in the permanent magnet slots; the rotor body is coaxially laminated by multiple layers of the same motor rotor laminations in the same arrangement Composition, characterized in that: the rotor body is provided with a plurality of high-strength steel wires, the high-strength steel wires are located between the adjacent motor rotor laminations, and the high-strength steel wires run through the permanent magnet slots, and each in the axial direction of the motor rotor shaft The distance between adjacent high-strength steel wires in a permanent magnet slot is less than the thickness of 10 motor rotor laminations, each permanent magnet slot is connected to two different motor rotor slots, and the permanent magnet does not contact the rotor bar. 2. The spoke-type permanent magnet self-starting motor rotor according to claim 1, wherein the motor rotor laminations include a motor outer unit part and a motor rotor yoke part, and the motor outer unit part is wound around the motor rotor yoke part Circumferentially distributed, the motor rotor yoke is sleeved on the motor rotor shaft, the permanent magnet slot is located in the gap between the motor outer unit and the motor rotor yoke, and both the motor outer unit and the motor rotor yoke are set Has fastening screw holes. 3. The spoke-type permanent magnet self-starting motor rotor according to claim 2, wherein the rotor body is composed of multi-layer motor rotor laminations connected by fastening bolts penetrating fastening screw holes. 4. The spoke-type permanent magnet self-starting motor rotor according to claim 2, characterized in that: the number of fastening screw holes on the outer unit part of the motor is two. 5. The spoke-type permanent magnet self-starting motor rotor according to claim 1, characterized in that: the width of the permanent magnet slot is the same as the width of the motor rotor slot bottom.