CN102315742A

CN102315742A - Permanent-magnet slotless brushless DC (Direct Current) motor

Info

Publication number: CN102315742A
Application number: CN201010213614XA
Authority: CN
Inventors: 马玉林; 裴超
Original assignee: XIAN CILIN ELECTRICAL CO Ltd
Current assignee: XIAN CILIN ELECTRICAL CO Ltd
Priority date: 2010-06-29
Filing date: 2010-06-29
Publication date: 2012-01-11

Abstract

The invention relates to a permanent-magnet slotless brushless DC (Direct Current) motor which comprises a rotor, a stator and a multi-phase stator winding. The stator is arranged outside the rotor, and the multi-phase stator winding is arranged on the stator. The permanent-magnet slotless brushless DC motor is characterized in that a winding framework is arranged at the inner side of the stator and is provided with a winding slot for containing the stator winding. A single conductor of the stator winding is embedded in the winding slot and is automatically clamped after an adjacent conductor is embedded, thus the winding process is simplified, the strength of the winding is increased and the precision of an air gap of the winding is ensured.

Description

A kind of permanent magnetism Slotless Brushless DC Motor

Technical field

The invention belongs to the mechanical & electrical technology field, be specifically related to a kind of permanent magnetism Slotless Brushless DC Motor.

Background technology

The most compacting moulding by casting that adopt of existing slotless winding, machining accuracy is poor, intensity is low, be unfavorable for batch process.

Summary of the invention

The object of the invention provides a kind of permanent magnetism Slotless Brushless DC Motor; To overcome the most compacting moulding by casting that adopt of slotless winding; Machining accuracy is poor, intensity is low, be unfavorable for that the problem of producing in batches reaches because existing slotless winding does not have skeleton; Increased manufacture difficulty, and very difficult coiling is even, makes the problem of the air gap low precision between winding and the rotor.

Technical solution of the present invention is: a kind of permanent magnetism Slotless Brushless DC Motor; Comprise rotor, be arranged on the outer stator of this rotor, be arranged on the multi phase stator winding on this stator; Its special character is; Said stator inboard is provided with the winding skeleton, and this winding skeleton is provided with the slot for winding that is used to put said stator winding.

The cross section of slot for winding is by 2/3rds annular of bottom and form with the lozenges that this annular upper end is joined, and this lozenges and this annular joint are to annular inner process, and the top of this lozenges is to annular outer incline.

Be provided with the relative slot for winding in bottom on the above and below of winding skeleton.

Said motor is provided with four pairs of permanent magnets; Be nested in the rotor core; And this rotor core is divided into 8 angles is 45 ° zone; On the inner surface of the stator circumference that each zone is corresponding this six phase stator winding is set, the 30 ° of electrical degrees in every group of winding interval, said stator winding is a six phase; And every phase stator winding is arranged in the said slot for winding in order, and the different name end of the end of the same name of first phase winding, second phase winding, the different name end of third phase winding, the end of the same name of the 4th phase winding, the end of the same name of the 5th phase winding, the different name end of six phase winding all are connected to the common junction at desirable zero point; Stator is provided with six rotor-position sensors, and each rotor-position sensor is arranged on the magnetic circuit center of every phase winding, and magnetic flux density reduces the alternate width of the width of part less than said six phase stator winding on the permanent magnet.

Winding skeleton provided by the invention is provided with a plurality of metallic channels, and the gap between each metallic channel is even, in the winding conducting wire insertion wire groove, is cast for one with stator more at last, and is so the winding making easily, high with the rotor airgap precision.

Description of drawings

Fig. 1 is a six-phase permanent-magnet Slotless Brushless DC Motor structural representation;

Fig. 2 is a winding skeleton structure sketch map;

Fig. 3 is the six-phase permanent-magnet Slotless Brushless DC Motor structural representation that is provided with position transducer.

Embodiment

Referring to Fig. 1, be the cross-sectional structure sketch map of permanent magnetism Slotless Brushless DC Motor of the present invention, as can be seen from the figure rotor 1, be arranged on the outer stator 2 of this rotor 1, the permanent magnet 3 on the rotor 1, be arranged on the inboard winding skeleton 4 of this stator 2.

Referring to Fig. 2; This winding skeleton 4 is provided with the slot for winding 5,6 that is used to put stator winding; The cross section of this slot for winding 5,6 is formed by 2/3rds annular 7 of bottom with the lozenges 8 that these annular 7 upper ends join; This lozenges 5 is jut 9 with these annular 7 joints to annular inner process, and the top of this lozenges 8 is to annular 7 outer inclines.Scheme thus, visible, slot for winding 5,6 is separately positioned on the above and below of winding skeleton 4; And the bottom of slot for winding 5,6 is relative, and all notch is outside, so is provided with; Be convenient to winding is placed in the slot for winding 5,6, treat that winding places in the slot for winding 5,6 after, the jut 9 on it is used to block winding; Guarantee firm the placing in the slot for winding 5,6 of winding, after the storing of completion winding, slot for winding 5,6 is closed; Inner surface with slot for winding 5 and stator 2 is cast for one again, is fixed on the inner surface of stator 2 with being about to winding skeleton 4, realizes complete stator 2.

When stator winding is six phase; Every phase stator winding is arranged in the said slot for winding in order, and the different name end of the end of the same name of first phase winding, second phase winding, the different name end of third phase winding, the end of the same name of the 4th phase winding, the end of the same name of the 5th phase winding, the different name end of six phase winding all are connected to the common junction at desirable zero point.At this moment; Permanent magnet 3 is four pairs; It is 45 ° zone that rotor core (permanent magnet 3 is nested in this rotor core) is divided into 8 angles, on the inner surface of the stator circumference that each zone is corresponding this 6 groups of multi phase stator windings is set, and every group of winding be 30 ° of electrical degrees at interval.

Referring to Fig. 3; Motor of the present invention is provided with four pairs of permanent magnets 3; Be nested in the rotor core 10, and this rotor core 10 is divided into 8 angles is 45 ° zone, on the inner surface of the stator circumference that each zone is corresponding this six phase stator winding is set; The 30 ° of electrical degrees in every group of winding interval; Said stator winding is a six phase, and every phase stator winding is arranged in the slot for winding 5,6 in order, and the end of the same name of first phase winding, the different name end of second phase winding, the different name end of third phase winding, the end of the same name of the 4th phase winding, the end of the same name of the 5th phase winding, the different name end of six phase winding all are connected to the common junction at desirable zero point; Stator is provided with six rotor-position sensors 11, and each rotor-position sensor 11 is arranged on the magnetic circuit center of every phase winding, and magnetic flux density reduces the alternate width of the width of part less than said six phase stator winding on the permanent magnet 3.Among Fig. 3 12 is for forming the non magnetic rotor block of rotor 1.

Claims

1. permanent magnetism Slotless Brushless DC Motor; Comprise rotor, be arranged on the outer stator of this rotor, be arranged on the multi phase stator winding on this stator; It is characterized in that: said stator inboard is provided with the winding skeleton, and this winding skeleton is provided with the slot for winding that is used to put said stator winding.

2. motor according to claim 1; It is characterized in that: the cross section of said slot for winding is by 2/3rds annular of bottom and form with the lozenges that this annular upper end is joined; This lozenges and this annular joint are to annular inner process, and the top of this lozenges is to annular outer incline.

3. motor according to claim 2 is characterized in that: be provided with the relative slot for winding in bottom on the above and below of said winding skeleton.

4. motor according to claim 3; It is characterized in that: said motor is provided with four pairs of permanent magnets; Be nested in the rotor core; And this rotor core is divided into 8 angles is 45 ° zone, on the inner surface of the stator circumference that each zone is corresponding this six phase stator winding is set, and every group of winding be 30 ° of electrical degrees at interval; Said stator winding is a six phase; And every phase stator winding is arranged in the said slot for winding in order, and the different name end of the end of the same name of first phase winding, second phase winding, the different name end of third phase winding, the end of the same name of the 4th phase winding, the end of the same name of the 5th phase winding, the different name end of six phase winding all are connected to the common junction at desirable zero point;

Said stator is provided with six rotor-position sensors, and each rotor-position sensor is arranged on the magnetic circuit center of every phase winding, and magnetic flux density reduces the alternate width of the width of part less than said six phase stator winding on the permanent magnet.