CN201438650U - A rotor structure of a conductor built-in permanent magnet synchronous motor - Google Patents

Abstract

A rotor structure of a permanent magnet synchronous motor with built-in conductors comprises a rotor core and a rotating shaft, wherein a rotor protective sleeve is arranged outside the rotor core; a plurality of rotor permanent magnet grooves are formed on the outer surface of the rotor core; a permanent magnet adopting a rectangular structure is arranged in each rotor permanent magnet groove; a plurality of rotor wiring grooves are formed in the rotor core in the positions close to the bottoms of the rotor permanent magnet grooves, and are uniformly distributed around the rotating shaft; a strip-shaped rotor conductor is arranged in each rotor wiring groove; and all the strip-shaped rotor conductors in the rotor wiring grooves are in short circuit at the two ends through coppery short circuit end rings. The utility model has the advantages of easy processing and assembly, high overload capacity and good dynamic performance, thereby achieving wide application prospect.

Description

A rotor structure of a conductor built-in permanent magnet synchronous motor

technical field

The utility model relates to a rotor structure, which is especially suitable for a rotor structure of a conductor built-in permanent magnet synchronous motor.

Background technique

The permanent magnet synchronous motor has the advantages of simple structure, small size, light weight, reliable operation and high efficiency. Therefore, it has been widely used in many fields such as aerospace, national defense, industrial and agricultural production, and daily life. Because this type of motor needs to install permanent magnets in the iron core, the manufacturing process of the motor is relatively complicated. In the research of permanent magnet synchronous motor, the research on the structure of the motor is the most critical. The rotor in which the permanent magnets are located on the surface of the rotor core has a simple structure, the rotor core is easy to process, and the permanent magnets are also simple to process and assemble. However, the general surface-type rotor has no rotor winding, does not have self-starting ability, has no damping effect, and the dynamic characteristics of the motor are not high.

Contents of the invention

The purpose of the utility model is to overcome the deficiencies of the prior art and provide a rotor structure of a conductor built-in permanent magnet synchronous motor with simple structure, easy processing, high dynamic characteristics and self-starting capability.

In order to achieve the above purpose, the technical solution of the utility model: it includes a rotor core and a rotating shaft, a rotor protection sleeve is arranged on the outside of the rotor core, a plurality of rotor permanent magnet slots are arranged on the outer surface of the rotor core, and each rotor is permanently The magnet slots are equipped with permanent magnets with a rectangular structure. The rotor core is close to the bottom of the permanent magnet slots of the rotor. A plurality of rotor slots are evenly distributed around the rotating shaft. Each rotor slot is equipped with a strip-shaped rotor conductor. The two ends of the rotor conductor are short-circuited by copper short-circuit end rings.

The number of the plurality of rotor permanent magnet slots is four; the number of the plurality of rotor wire slots is twelve; the strip rotor conductors are copper conductors.

The utility model has the advantages that: the permanent magnet is designed as a rectangular structure, placed in the groove on the surface of the rotor core, the processing technology is simple, and the installation of the permanent magnet is easy; the direct-axis reluctance of the motor with this structure is larger than that of the general permanent magnet motor, increasing the The saliency ratio and reluctance torque of the motor improve the overload capacity of the motor; the rotor winding is placed in the rotor, which has the self-starting ability. In addition, when the rotor oscillates during the operation of the motor, the rotor winding will produce braking properties. The electromagnetic torque makes the oscillation quickly attenuate, thereby improving the dynamic performance of the motor.

Description of drawings

Fig. 1 Rotor structure diagram of permanent magnet synchronous motor with built-in conductor

Figure 2 Structural diagram of built-in conductor short-circuit end ring

Explanation of symbols: 1-rotor protection sleeve; 2-rotor core; 3-rotor permanent magnet slot; 4-permanent magnet; 5-rotor wire slot; 6-rotor conductor; 7-rotating shaft;

Detailed ways

Below in conjunction with accompanying drawing, one embodiment of the present utility model is described step by step:

As shown in the figure: The rotor structure of the conductor built-in permanent magnet synchronous motor of the present invention includes a rotor core 2 and a rotating shaft 7. The rotor core 2 is provided with a rotor protection sleeve 1, and the rotor core 2 adopts a diameter of 0.8~1.75mm. Thick silicon steel sheets are stacked, and the outer surface of the rotor core 2 is provided with four rotor permanent magnet slots 3 with a rectangular bottom design. Each rotor permanent magnet slot 3 is equipped with a permanent magnet 4 with a rectangular structure. The permanent magnet 4 adopts Made of rare earth permanent magnet material, the rotor protection sleeve 1 is made of non-magnetic material, which is tightly sleeved on the outer surface of the rotor core 2 to protect the permanent magnet 4, and the inner part of the rotor core 2 is close to the bottom of the rotor permanent magnet groove 3. Twelve rotor slots 5 evenly distributed on the rotating shaft 7, each rotor slot 5 is equipped with a cylindrical copper strip rotor conductor 6, and the two ends of the strip rotor conductor 6 are short-circuited by a copper short-circuit end ring 8 , The rotor conductor 6 and the conductor short-circuit end ring 8 are connected to each other to form a firm cage structure.

Claims (4)

1. A rotor structure of a conductor built-in permanent magnet synchronous motor, which includes a rotor core (2) and a rotating shaft (7), characterized in that: the outside of the rotor core (2) is provided with a rotor protection sleeve (1) , the outer surface of the rotor core (2) is provided with a plurality of rotor permanent magnet slots (3), and each rotor permanent magnet slot (3) is provided with a permanent magnet (4) with a rectangular structure, and the rotor core (2) is close to A plurality of rotor wire slots (5) evenly distributed around the rotating shaft (7) are arranged at the bottom of the rotor permanent magnet slot (3), and each rotor wire slot (5) is provided with a strip-shaped rotor conductor (6). Both ends of the rotor conductor (6) are short-circuited through copper short-circuit end rings (8). 2. The rotor structure of the conductor built-in permanent magnet synchronous motor according to claim 1, characterized in that: the number of the plurality of rotor permanent magnet slots (3) is four. 3. The rotor structure of the conductor built-in permanent magnet synchronous motor according to claim 1, characterized in that: the plurality of rotor slots (5) is twelve. 4. The rotor structure of the conductor built-in permanent magnet synchronous motor according to claim 1, characterized in that: the strip-shaped rotor conductor (6) is a copper conductor.

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