CN203180674U - Permanent-magnet synchronous motor rotor beneficial to dynamic balance of rotor - Google Patents

Abstract

The utility model provides a permanent-magnet synchronous motor rotor beneficial to dynamic balance of the rotor. According to the motor rotor, two symmetrical flat keys are arranged on a shaft. Iron cores are sleeved on the shaft which is provided with the flat keys in a segmented mode. The iron cores are symmetrically provided with a magnetic steel groove 3a and a magnetic steel groove 3b, a magnetic steel groove 4a and a magnetic steel groove 4b, a magnetic steel groove 5a and a magnetic steel groove 5b, a magnetic steel groove 6a and a magnetic steel groove 6b along a periphery. Center positions of the iron cores are symmetrically provided with a key groove 7a and a key groove 7b, a key groove 8a and a key groove 8b, a key groove 9a and a key groove 9b, a key groove 10a and a key groove 10b. A rotor iron core segment number equals to one-half of a motor pole number. Each turn pole angle alpha satisfies the following formula: alpha= (360 degree/ a motor stator groove number* a stator chute number)/ (the segment number-1). An adjacent key groove angel equals to (360 degree/the pole number) plus the alpha. Shapes and sizes of the several segments of rotor iron cores on the rotor are the same. Only one die is needed, and high speed stamping and automatic lamination can be realized. Efficiency is high and management is easy. A rotor structure is approximately symmetrical, which is beneficial to dynamic balance verification.

Description

A kind of permanent-magnetic synchronous motor rotor that is beneficial to rotor dynamic balancing

Technical field

The utility model relates to the permagnetic synchronous motor field, specially refers to a kind of permanent-magnetic synchronous motor rotor that is beneficial to rotor dynamic balancing.

Background technology

For reducing the motor slot effect, high frequency torque pulsation and noise that weakening is caused by slot ripples, permagnetic synchronous motor generally adopts skewed stator slot or rotor segmentation to change utmost point technology, and skewed stator slot is unfavorable for the machine rule, and utmost point technology is changeed in the rotor segmentation of adopting at present following shortcoming:

1, rotor core is generally taked every section mold or adjustable mold because the positioning spline position is different, and die cost height, reliability are low;

2, every section size difference of rotor core (difference is very little) can not be general.Cause iron core wide in variety, be not easy to management, also be easy to load in mixture phenomenon;

3, the employing armature spindle that has is organized design more, and difficulty of processing is big, and influential to axle intensity;

4, the employing single key slot design that has, influential to transmitting moment of torsion and rotor dynamic balancing.

Summary of the invention

The purpose of this utility model is to provide a kind of motor rotor core to be designed to the permanent-magnetic synchronous motor rotor that is beneficial to rotor dynamic balancing that the utmost point is changeed in segmentation.

For achieving the above object, the technical solution of the utility model is:

A kind of permanent-magnetic synchronous motor rotor that is beneficial to rotor dynamic balancing, comprise iron core, axle and flat key, this rotor is equipped with the flat key of 2 symmetries at axle, be equipped with flat key the axle on segmented sheathing cored, iron core along circumference place symmetry have magnet steel groove 3a and 3b, 4a and 4b, 5a and 5b, 6a and a 6b, the center symmetry of iron core have keyway 7a and 7b, 8a and 8b, 9a and 9b, 10a and a 10b.

Described rotor core segments is determined by following formula:

Rotor core segments=motor pole number/2;

Every section is changeed utmost point angle [alpha] and is determined by following formula:

α=(360 °/motor stator slot number * skewed stator slot number)/(hop count-1);

The adjacent key angle of the v-groove is determined by following formula:

The adjacent key angle of the v-groove=(360 °/number of poles)+α, α is every section in the formula changes the polar angle degree.

Good effect of the present utility model is:

1, these epitrochanterian several sections rotor core overall dimensions are finished equally, only need with a secondary mould, can realize high speed stamping, lamination automatically, efficient height and be beneficial to management;

2, rotor core near symmetrical structure, the initial unbalancing value of rotor is little.

Description of drawings

Fig. 1, be beneficial to the structural representation of the permanent-magnetic synchronous motor rotor of rotor dynamic balancing;

The structural representation of Fig. 2, armature spindle;

The structural representation of Fig. 3, iron core.

Embodiment

Further specify embodiment of the present utility model below in conjunction with accompanying drawing 1-3.

1, data computation: be example with 8 utmost points, 48 groove motors, its skewed stator slot number is 0.5 groove,

Rotor core segments=8/2=4(section);

Every section is changeed the polar angle degree: α=(360 °/48 * 0.5)/(4-1)=1.25 °;

The adjacent key angle of the v-groove=(360 °/8)+1.25 °=46.25 °.

2, the assembling of rotor:

Referring to Fig. 1, Fig. 2 and Fig. 3, at first load onto the flat key 11 of 2 symmetries at axle 2, behind the 7a and 7b keyway on the flat key 11 alignment first iron leg core 1 on the axle 2, the first iron leg core 1 is installed, behind the 10a and 10b keyway on the flat key 11 alignment second iron leg core 12 on the axle 2, the second iron leg core 12 is installed, magnet steel groove 4a on the second iron leg core 12 and the magnetic fragrant grass 3a on 4b and the first iron leg core 1 and the angle of 3b are 1.25 ° at this moment, behind the 9a and 9b keyway on flat key 11 alignment the 3rd iron leg core 13 on the axle 2, the 3rd iron leg core 13 is installed, magnet steel groove 5a on the 3rd iron leg core 13 and the magnet steel groove 3a on 5b and the first iron leg core 1 and the angle of 3b are 2.5 ° at this moment, behind the 8a and 8b keyway on flat key 11 alignment the 4th iron leg core 14 on the axle 2, the 4th iron leg core 14 is installed, magnet steel groove 6a on the 4th iron leg core 14 and the magnet steel groove 3a on 6b and the first iron leg core 1 and the angle of 3b are 3.75 ° at this moment, and 4 sections rotor cores assemblings are finished.This moment keyway 7a and 7b and 10a and 10b keyway angle=(360 °/8)+1.25 °=46.25 ° on the second iron leg core 12, the 3rd iron leg core keyway 9a and 9b and 10a and 10b keyway angle=(360 °/8)+1.25 °=46.25 ° then, then the 4th iron leg core keyway 8a and 8b and 9a and 9b keyway angle=(360 °/8)+1.25 °=46.25 °.

Claims (2)

1. permanent-magnetic synchronous motor rotor that is beneficial to rotor dynamic balancing, comprise iron core (1), iron core (12), iron core (13), iron core (14), axle (2) and flat key (11), it is characterized in that: the flat key (11) that 2 symmetries are arranged on the axle (2), go up segmented sheathing cored (1) at the axle (2) that flat key (11) is housed, iron core (12), iron core (13), iron core (14), iron core (1) to iron core (14) along the circumference place respectively symmetry have magnet steel groove 3a and a 3b, 4a and 4b, 5a and 5b, 6a and 6b, iron core (1) has keyway 7a and a 7b to the center symmetry of iron core (14), 8a and 8b, 9a and 9b, 10a and 10b.

2. a kind of permanent-magnetic synchronous motor rotor that is beneficial to rotor dynamic balancing according to claim 1 is characterized in that: the rotor core segments is determined by following formula:

Rotor core segments=motor pole number/2;

Every section is changeed utmost point angle [alpha] and is determined by following formula:

α=(360 °/motor stator slot number * skewed stator slot number)/(hop count-1);

The adjacent key angle of the v-groove is determined by following formula:

The adjacent key angle of the v-groove=(360 °/number of poles)+α, α is every section in the formula changes the polar angle degree.

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