CN201742192U

CN201742192U - Tangential magnetic steel rotor structure of permanent magnet motor

Info

Publication number: CN201742192U
Application number: CN2010202500146U
Authority: CN
Inventors: 郑文鹏; 王建宽; 包广青
Original assignee: CETC 21 Research Institute
Current assignee: CETC 21 Research Institute
Priority date: 2010-07-08
Filing date: 2010-07-08
Publication date: 2011-02-09
Anticipated expiration: 2020-07-08

Abstract

The utility model discloses a tangential magnetic steel rotor structure of a permanent magnet motor. A rotor core stamped steel adopts a notch dissymmetrical structure, and an included angle exists between a rotor magnetic pole physical centerline and the geometric centerline of a magnetic steel tank. A core is piecewise piled up along an axial direction, wherein the stamped steel of each segment of core is arranged along an opposite notch direction, and the magnetic steel tanks of all stamped steels are aligned. In the tangential magnetic steel rotor, the rotor core are piled up by the rotor stamped steels of the dissymmetrical notch, the effect of rotor skewing is achieved, and cogging torque is reduced. Compared with the special-shape magnetic steel or magnetic steel piecewise structure, the tangential magnetic steel rotor structure has the advantages of simple structure, low cost, easy processing, and the like and is suitable for batch production.

Description

Magneto tangential magnet-steel rotor structure

Technical field

The utility model relates to a kind of magneto tangential magnet-steel rotor structure, relates in particular to a kind of rotor structure with oblique utmost point effect.

Background technology

Because there is the teeth groove location torque in the existence of permanent magnet and teeth groove between the rotor, can cause unfavorable factors such as torque pulsation increase, vibration and noise in the magneto.For this reason, people take several steps and reduce the teeth groove location torque.Wherein, flume structure can be adopted, location torque can be effectively reduced in coil sides, the disadvantage that adopts this structure is to need special frock when the iron core closed assembly, and difficulty of processing is big, long processing time, and the winding copper factor can not be too high, also is unfavorable for the automation winding operation.For overcoming the deficiency of flume structure, coil sides still adopts the straight trough structure, and adopts the rotor structure with oblique utmost point effect in the magnet steel side.For magnet steel surface-mount type rotor, oblique utmost point measure commonly used is for adopting that special shape magnet steel and magnet steel segmentation are staggered etc.The special shape magnet steel is processed and is magnetized and all compares difficulty, and is only applicable to the surface-mount type structure.And the magnet steel segmentation is when staggering, and the magnet steel positioning accuracy should not guarantee that assembling is difficulty relatively, and is not easy for the little occasion of magnetic pole axial length.For the embedded structure of traditional magnet steel, as depicted in figs. 1 and 2, punching is generally remain silent groove or symmetrical channels mouth structure, only is fit to the oblique utmost point mode that adopts the magnet steel segmentation to stagger.

The utility model content

Technical problem to be solved in the utility model is to provide a kind of motor tangential magnet-steel rotor structure to have oblique utmost point effect, magnetic direction is tangential, magnet steel is under the situation without segmentation, can realize oblique utmost point effect by the special groove mouth structure of rotor core, reduce cogging torque, can reduce simultaneously the difficulty of processing and the cost of rotor, improve working (machining) efficiency.

In order to solve above technical problem, the utility model has adopted following technical scheme: the notch dissymmetrical structure is adopted in the rotor core punching, and there is angle in the geometric center lines of rotor magnetic pole physical centre line and magnet steel groove; With this iron core segmentation closed assembly vertically, the punching of wherein every iron leg core is placed by opposite notch direction, and the magnet steel groove of all punchings all aligns.Because the difference of notch direction can reach the oblique utmost point effect during punching closed assembly.

Advantage of the present utility model is: in the tangential magnet-steel rotor, rotor core adopts the rotor punching closed assembly of asymmetric notch, can reach the effect of skewed-rotor, reduces cogging torque.Compare with adopting special shape magnet steel or magnet steel segmental structure, have simple in structure, advantages such as cost is low, easy processing, be more suitable for producing in batches.

Description of drawings

Fig. 1 is a kind of traditional closed type tangential magnet-steel rotor punching structural representation;

Fig. 2 is a kind of traditional notch symmetrical expression tangential magnet-steel rotor punching structural representation;

Fig. 3 is an example structure schematic diagram of the present utility model, and the notch dissymmetrical structure is adopted in punching;

Fig. 4 is the schematic diagram that punching shown in Figure 3 is oppositely placed;

Fig. 5 is that punching divides two sections rotor core structure schematic diagrames behind the closed assembly;

The number in the figure explanation

1-core packet 1; 2-core packet 2.

Embodiment

See also shown in the accompanying drawing, the utility model will be further described.

As shown in Figure 3, the utility model provides a kind of notch asymmetric rotor punching structure, a side of punching notch deflection magnet steel groove.Because the existence of this asymmetric notch makes the geometric center lines of rotor magnetic pole physical centre line and magnet steel groove have angle theta.When the punching closed assembly, whole iron core is divided into 2 sections vertically, as shown in Figure 5.Wherein the placement of Fig. 3 punching notch direction is pressed in all punchings of core packet 1, and all punchings of core packet 2 are pressed Fig. 4 punching notch direction and placed, all punching magnet steel grooves alignment of section 1 and section 2.Like this, because core packet 1 and section 2 part punching notch directions is different, produces oblique utmost point effect vertically at whole iron core, thereby can reduce the teeth groove location torque of motor.In practical engineering application, rotor core can be divided into multistage according to process condition, the punching of every iron leg core is placed on the contrary by the notch direction, and all punching magnet steel grooves all align.

Claims

1. magneto tangential magnet-steel rotor structure is characterized in that:

The notch dissymmetrical structure is adopted in the rotor core punching, and there is angle in the geometric center lines of rotor magnetic pole physical centre line and magnet steel groove; With this iron core segmentation closed assembly vertically, the punching of wherein every iron leg core is placed by opposite notch direction, and the magnet steel groove of all punchings all aligns.