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Surface-mounted type permanent magnet synchronous motor

A permanent magnet synchronous motor, surface-mounted technology, applied in magnetic circuits, electrical components, electromechanical devices, etc., can solve the problems of reduced slot full rate, increased torque fluctuation rate, and high cost, and achieves rotor dynamic balance optimization, The effect of reducing cogging torque and prolonging service life

Inactive Publication Date: 2016-08-24
TIANJIN UNIV
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0002] As we all know, due to the tangential component of the interaction force between the permanent magnet and the armature cogging, a pulsating torque called cogging torque will be generated during operation, which will increase the torque fluctuation rate and affect the performance of the permanent magnet motor. run
[0003] The usual way to eliminate the cogging torque is to tilt the stator with windings out of a slot pitch within the length of the iron core, or tilt the rotor with permanent magnets out of the stator by a slot pitch, but the former will make the slot The full rate is reduced, the latter will cause the magnetizing tooling to be incompatible and require higher process requirements and higher costs

Method used

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  • Surface-mounted type permanent magnet synchronous motor
  • Surface-mounted type permanent magnet synchronous motor
  • Surface-mounted type permanent magnet synchronous motor

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Embodiment 1

[0061] Such as figure 1 As shown, the surface-mounted permanent magnet synchronous motor of the present invention is set as an inner rotor structure, and the outer circumference of the rotor is provided with eight permanent magnet poles and one soft iron pole at equal intervals, and the stator is provided with 24 armature slots, and the number of phases is set is 3, the permanent magnet pole width is set to 11mm, and the soft iron pole width is set to 3mm. When m=2, the permanent magnet pole offset angle Δθm=2π / 8 / 24=1.875°, that is to say, with the permanent magnet pole For comparison with uniformly distributed motors, since the addition of soft iron poles will cause the permanent magnet poles to shift, assuming that the first permanent magnet pole position of the two motors is the same, when the second permanent magnet pole offset angle is 1.875°, 2pN p =8, it can eliminate the harmonic order of the 8 times harmonic in the original cogging torque, thereby reducing the coggin...

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Abstract

The invention discloses a surface-mounted type permanent magnet synchronous motor. The motor comprises a stator and a rotor, wherein armature tooth slots are formed in the stator; the rotor is provided with even number of permanent magnetic poles along the circumference; the motor is characterized in that the rotor is also provided with a soft iron magnetic pole; the soft iron magnetic pole is arranged between adjacent two permanent magnetic poles; the soft iron magnetic pole and the permanent magnetic poles are distributed along the circumference at equal intervals; and the density of the soft iron magnetic pole is the same as that of the permanent magnetic poles. By adoption of the permanent magnet synchronous motor, the harmonic in the original tooth slot torque can be restrained so as to weaken the effect of the tooth slot torque.

Description

technical field [0001] The invention relates to a synchronous motor, in particular to a surface-mounted permanent magnet synchronous motor. Background technique [0002] As we all know, due to the tangential component of the interaction force between the permanent magnet and the armature cogging, a pulsating torque called cogging torque will be generated during operation, which will increase the torque fluctuation rate and affect the performance of the permanent magnet motor. run. [0003] The usual way to eliminate the cogging torque is to tilt the stator with windings out of the core length by one slot pitch, or tilt the rotor with permanent magnets out of the stator by one slot pitch, but the former will make the slot The full rate is reduced, and the latter will cause the magnetizing tooling to be incompatible and require higher process requirements and higher costs. Contents of the invention [0004] The object of the present invention is to overcome the deficiencie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K1/27
CPCH02K1/2706H02K2213/03
Inventor 王晓远陈博谢宇王谊齐丹丹
Owner TIANJIN UNIV
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