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Three-phase alternating current permanent magnet motor

A permanent magnet motor and three-phase AC technology, which is applied in the field of motors, can solve the problems of large unilateral magnetic pull and serious meshing torque of AC permanent magnet motors, and achieve the effect of reducing unilateral magnetic pull

Active Publication Date: 2010-11-24
FORTIOR TECH SHENZHEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide an effective scheme for installing permanent magnets on the surface of the rotor for AC permanent magnet motors, thereby solving the technical problems of severe meshing torque and large unilateral magnetic pull of AC permanent magnet motors

Method used

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  • Three-phase alternating current permanent magnet motor
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  • Three-phase alternating current permanent magnet motor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Such as Figure 4 As shown, a three-phase AC permanent magnet motor includes a rotor and a stator, the rotor includes a rotor core 402 and a magnetic steel 405 arranged on the rotor core 402; the stator includes a stator core 401, an A-phase motor Armature winding, B-phase armature winding, C-phase armature winding, stator core 401 is provided with stator slot 403 and stator teeth 404, the number of magnetic poles of the rotor is 16; the number of stator slots 403 is 18; the number of stator teeth 404 The number is 18; the number of A-phase armature windings is 6, and they are independently arranged on 6 stator teeth 404, and each coil surrounds a stator tooth; the number of B-phase armature windings is also 6, and They are independently arranged on the other 6 stator teeth, and the winding form is the same as that of phase A. The number of C-phase armature windings is also 6, which are independently arranged on the other 6 stator teeth, and the winding form is also th...

Embodiment 2

[0038] Such as Figure 5 As shown, a three-phase AC permanent magnet motor is basically the same as Embodiment 1, except that the number of magnetic poles of the rotor is 20. This motor structure with 18 slots and 20 poles does not generate unilateral magnetic pull due to the symmetry in the left and right spaces and the up and down spaces. Since the period of its meshing torque is 2°, the meshing torque of this motor is also very small.

[0039] In the three-phase AC permanent magnet motor provided in embodiment 1 and embodiment 2, each pair of magnetic poles on the rotor contains two magnetic steels with opposite magnetic field directions. Here, the rotor with this structure is defined as a two-way magnetic steel SMM rotor . The two-way magnetic steel SMM rotor can reduce the influence of the armature reaction on the characteristics of the motor, but there are still the following problems:

[0040] (1) The permanent magnetic steel is installed on the surface of the rotor ...

Embodiment 3

[0046] A three-phase AC permanent magnet motor includes a stator and a rotor.

[0047] The stator has the same stator structure as in Embodiment 1, that is, the stator includes a stator core, an A-phase armature winding, a B-phase armature winding, and a C-phase armature winding. The stator core is provided with stator slots and stator teeth, and the rotor The number of magnetic poles is 16; the number of stator slots is 18; the number of stator teeth is 18; the number of A-phase armature windings is 6, and they are independently arranged on 6 stator teeth 404, and each coil surrounds One stator tooth; the number of B-phase armature windings is also 6, and they are independently arranged on the other 6 stator teeth, and the winding form is the same as that of A-phase. The number of C-phase armature windings is also 6, which are independently arranged on the other 6 stator teeth, and the winding form is also the same as that of A-phase.

[0048] Rotor such as Figure 6 As sho...

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Abstract

The invention relates to a three-phase alternating current permanent magnet motor, comprising a rotor and a stator. By installing 9M armature windings on the stator and 8M or 10M magnetic poles on the rotor, symmetry of the three phase alternating current permanent magnet motor can be realized in the left-right space and up-down space, thus greatly lowering engagement torque and unilateral magnetic pull. Required pole pairs of rotor field can be realized by permanent magnet steels with same radial magnetic polarity and periodic configuration of rotor tooth sockets, thus greatly improving mechanical strength and motor performance of the rotor magnetic steels.

Description

technical field [0001] The invention relates to motor technology, in particular to a three-phase AC permanent magnet motor. Background technique [0002] With the development of electronic technology, sensor technology, control technology and material science, three-phase AC permanent magnet motors have been widely used in many fields such as servo systems, and the performance requirements of each application field are getting higher and higher. [0003] Since the iron core material of the three-phase AC permanent magnet motor works in a saturated state, the armature reaction of the motor is inevitable. The armature reaction has a great influence on the torque coefficient, causing the coefficient to decrease with the increase of the armature current. In order to reduce the armature reaction, many three-phase AC permanent magnet motors used in servo systems adopt a surface mounted magnet (SMM) structure, and increase the air gap between the stator and the rotor of the motor....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K21/02H02K1/27H02K1/14H02K1/16
CPCH02K1/27H02K21/16H02K1/278H02K1/276
Inventor 毕磊
Owner FORTIOR TECH SHENZHEN