Double-stator permanent magnet synchronous motor

A permanent magnet synchronous motor and double stator technology, which is applied in the direction of electrical components, electromechanical devices, and magnetic circuit static parts, can solve the problems of large magnetomotive force harmonic content of fractional slot windings, large number of coils of fractional slot windings, The problem of large eddy current loss of the permanent magnet of the rotor, etc., achieves the effect of less number of armature slots and coils, less eddy current loss, and less harmonic content

Active Publication Date: 2018-08-10
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the number of coils in the fractional slot winding is large, and the manufacturing cost is high; at the same time, due to the high harmonic content of the magnetomotive force of the fractional slot winding, when the energization frequency

Method used

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Examples

Experimental program
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Embodiment 1

[0058] figure 1 It is Example 1 of the present invention. The double-stator permanent magnet synchronous motor of the present embodiment is made up of two stators 1 and rotor 2,

[0059] The rotor 2 and the two stators 1 are arranged axially, the rotor 2 is located between the two stators 1, there is an air gap between the rotor 2 and the two stators 1, and each stator 1 consists of a stator core 1-1 and a stator winding 1 -2 composition; 12 slots are radially opened on the air gap side surface of each stator core 1-1, and the formed small teeth 3, slots 4 and large teeth 5 are arranged alternately along the circumferential direction, and the pitch of the large teeth is t s2 and polar distance τ p satisfies the relation 3t s2 =4τ p ;Large tooth width b s2 , small tooth pitch t s1 , small tooth width b s1 satisfies the relation b s2 = 2t s1 +b s1 , the stator windings 1-2 are concentrated full-pitch windings, one coil is wound on each large tooth 5, the coils on adja...

Embodiment 2

[0062] figure 2 It is Example 2 of the present application. The dual-stator permanent magnet synchronous motor of the present embodiment comprises two stators 1 and a rotor 2,

[0063] The rotor 2 and the two stators 1 are arranged axially, the rotor 2 is located between the two stators 1, there is an air gap between the rotor 2 and the two stators 1, and each stator 1 consists of a stator core 1-1 and a stator winding 1 -2 composition; the surface of each stator core 1-1 air gap side is smooth, and the primary winding is fixed on the surface of the stator core 1-1 air gap side, the primary winding is composed of concentrated coils, and the 6 coils constituting the three-phase winding are along the circumference The directions are arranged in sequence, the coils do not overlap, the adjacent coils belong to different phases, and the distance between the centers of adjacent coils is t c and polar distance τ p satisfies the relation 3t c =4τ p , all the coils on each stator...

Embodiment 3

[0066] image 3 It is Example 3 of the present application. The double-stator permanent magnet synchronous motor of the present embodiment is made up of two stators 1 and rotor 2,

[0067] The rotor 2 and the two stators 1 are arranged axially, the rotor 2 is located between the two stators 1, there is an air gap between the rotor 2 and the two stators 1, and each stator 1 consists of a stator core 1-1 and a stator winding 1 -2 composition; 12 slots are opened in the axial direction on the air gap side surface of each stator core 1-1, and the formed small teeth 3, slots 4 and large teeth 5 are arranged alternately along the circumferential direction, and the pitch of the large teeth is t s2 and polar distance τ p satisfies the relation 3t s2 =4τ p ;Large tooth width b s2 , small tooth pitch t s1 , small tooth width b s1 satisfies the relation b s2 = 2t s1 +b s1 , the stator windings 1-2 are concentrated full-pitch windings, one coil is wound on each large tooth 5, th...

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Abstract

The invention discloses a double-stator permanent magnet synchronous motor, and relates to the field of motors. The invention aims at solving problems that a conventional double-stator permanent magnet synchronous motor usually employs a fractional-slot concentrated winding, the number of coils of the fractional-slot concentrated winding is large and the manufacturing cost is larger; and problemsthat the big eddy-current loss of a rotor permanent magnet and the rising of the temperature of the permanent magnet are liable to cause the irreversible demagnetization because the harmonic content of the magnetomotive force of the fractional-slot concentrated winding is large when the power-on frequency of a motor winding is higher and the overload multiples is large. The double-stator permanentmagnet synchronous motor provided by the invention enables the harmonic contents of a synthetic magnetomotive force and the magnetomotive force of two armatures to be small through the correspondingstaggering of double-stator windings, and is small in eddy-current loss of the rotor permanent magnet. Moreover, the end parts of the windings are not overlapped, thereby improving the motor efficiency and reliability.

Description

technical field [0001] The invention relates to a double-stator permanent magnet synchronous motor. It belongs to the motor field. Background technique [0002] Different from the single-stator permanent magnet synchronous motor, the radial double-stator permanent magnet synchronous motor has two inner and outer concentric stators, and its cup-shaped rotor is placed between the inner and outer stators, thus forming two inner and outer air gaps. The interaction between the inner stator winding and the inner air gap produces electromagnetic torque, and the interaction between the outer stator winding and the outer air gap also produces electromagnetic torque. These two parts of torque are respectively transmitted through the inner and outer air gaps and then applied to the cup-shaped rotor together, thus double The torque density and power density of the stator permanent magnet synchronous motor are correspondingly improved. [0003] The structure of the traditional double-s...

Claims

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Application Information

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IPC IPC(8): H02K16/04H02K1/14H02K1/16H02K3/16
CPCH02K1/14H02K1/16H02K3/16H02K16/04H02K2213/03
Inventor 寇宝泉张浩泉张赫
Owner HARBIN INST OF TECH
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