CN203707910U

CN203707910U - Rotor reducing tooth space torque

Info

Publication number: CN203707910U
Application number: CN201420062989.4U
Authority: CN
Inventors: 陆建国
Original assignee: Zhejiang Linix Motor Co Ltd
Current assignee: Zhejiang Linix Motor Co Ltd
Priority date: 2014-02-12
Filing date: 2014-02-12
Publication date: 2014-07-09
Anticipated expiration: 2024-02-12

Abstract

The utility model discloses a rotor reducing a tooth space torque. The rotor comprises a rotor shaft, a rotor iron core and magnetic steel. The rotor iron core is fixed to the rotor shaft. The magnetic steel is attached to the rotor iron core. The rotor iron core is formed by lamination of rotor punching sheets. Each rotor punching sheet comprises a central hole and positioning holes around the central hole. The periphery of each rotor punching sheet is uniformly provided with eight protrusions. Every two adjacent protrusions have an inclined angle of 45 degrees. The rotor has the delicate design of the integrated iron core reducing the tooth space torque, so as to effectively reduce the tooth space torque, and ensures the motor to achieve low speed performance in a speed control system and high precision positioning in a position control system.

Description

A kind of rotor that reduces cogging torque

Technical field

The utility model relates to field of motor manufacturing, specifically a kind of rotor that reduces cogging torque.

Background technology

Cogging torque (Cogging torque), is the intrinsic phenomenon of magneto, and it is under the cold state of armature winding, and the magnetic field being produced by permanent magnet acts on the teeth groove of armature core the torque that circumferencial direction produces.Its generation comes from the tangential force between permanent magnet and armature tooth, makes the rotor of permanent magnet motor have a kind of trend of aliging with stator along a certain specific direction, attempts rotor to be positioned at some position, the one vibration torque that trend produces thus.

Cogging torque can make motor torque fluctuation, produces vibration and noise, occurs the fluctuation of speed, makes the motor can not even running, affects the performance of motor.Make motor produce undesirable vibration and noise simultaneously.In variable speed drives, in the time that the mechanical resonance frequency of torque pulsation frequency and stator or rotor is consistent, vibration and noise that cogging torque produces will be exaggerated.The existence of cogging torque has affected the hi-Fix in low-speed performance and the position control system of motor in speed control system equally.

Utility model content

In order to solve the above-mentioned technical problem existing in prior art, the utility model provides a kind of rotor that reduces cogging torque, comprise armature spindle, rotor core and magnet steel, described rotor core is fixed on armature spindle, magnet steel adheres to rotor core, and described rotor core has that rotor punching is stacked to be formed, and every rotor punching comprises centre bore and is positioned at centre bore location hole around, on the excircle of described rotor punching, be evenly distributed with eight projections, interval 45o between each projection is mutual.

Further, described projection comprises platform part and is positioned at the half-round in platform part.

The integration core structure design of minimizing cogging torque of the present utility model is ingenious, can effectively reduce cogging torque, guarantees the hi-Fix in low-speed performance and the position control system of motor in speed control system.

Accompanying drawing explanation

Fig. 1 is the rotor structure schematic diagram of minimizing cogging torque of the present utility model;

Fig. 2 is the structural representation of the rotor punching of the rotor core of this minimizing cogging torque;

Fig. 3 is protruding enlarged drawing.

Embodiment

Below in conjunction with accompanying drawing, the utility model is described in further detail.

As illustrated in fig. 1 and 2, the rotor of minimizing cogging torque of the present utility model, comprise armature spindle 1, rotor core 2 and magnet steel 3, wherein rotor core 2 is fixed on armature spindle 1, magnet steel 3 adheres to rotor core 2, and wherein said rotor core 2 has that rotor punching 4 is stacked to be formed, and every rotor punching 4 comprises centre bore 5 and is positioned at centre bore location hole 6 around, on the excircle of described rotor punching 4, be evenly distributed with eight projections 7, each protruding 7 mutually between interval 45o.

As shown in Figure 3, projection 7 comprises platform part 8 and is positioned at the half-round 9 in platform part.

Shown in the above and figure is only preferred implementation of the present utility model.It should be pointed out that for the person of ordinary skill of the art, not departing under the prerequisite of the utility model principle, can also make some modification and improvement, these also should be considered as belonging to protection range of the present utility model.

Claims

1. one kind is reduced the rotor of cogging torque, comprise armature spindle (1), rotor core (2) and magnet steel (3), described rotor core (2) is fixed on armature spindle (1), magnet steel (3) adheres to rotor core (2), it is characterized in that: described rotor core (2) has stacked the forming of rotor punching (4), every rotor punching (4) comprises centre bore (5) and is positioned at centre bore location hole (6) around, on the excircle of described rotor punching (4), be evenly distributed with eight projections (7), interval 45o between each projection (7) is mutual.

2. the rotor of minimizing cogging torque as claimed in claim 1, is characterized in that: described projection (7) comprises platform part (8) and is positioned at the half-round (9) in platform part (8).