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Single-phase self-start permanent magnet synchronous motor

A permanent magnet synchronous motor, self-starting technology, applied in synchronous motors with stationary armatures and rotating magnets, synchronous machine parts, shapes/styles/structures of winding conductors, etc., can solve complex controllers and sensors, Increased manufacturing costs and other issues, resulting in improved running smoothness, improved starting performance, and reduced vibration and noise levels

Active Publication Date: 2011-05-04
SOUTHEAST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can completely eliminate torque ripple in theory, but due to the need to use complex controllers and sensors, it greatly increases the manufacturing cost

Method used

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  • Single-phase self-start permanent magnet synchronous motor

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with the accompanying drawings.

[0020] As shown in the drawings, a single-phase self-starting permanent magnet synchronous motor of the present invention includes a rotor yoke 1, a permanent magnet 2, a stator shaft hole 5 and a stator 3. The rotor yoke 1 is an outer rotor structure, and the rotor yoke 1 uses a magnetically conductive Made of steel, the permanent magnet 2 is pasted on the inner surface of the rotor yoke 1, and the N pole and S pole are spaced apart. The inner diameter of the permanent magnet is R. The inner side of the permanent magnet 2 is a stator, and the stator includes a stator iron core 3 and a single-phase stator winding 4, and the number of teeth of the stator is the same as the number of magnetic poles of the rotor (both are six). The surface of the teeth of the stator core 3 is a curved surface formed by connecting the first arc 7 and the second arc 8 , and an air gap exis...

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Abstract

The invention discloses a single-phase self-start permanent magnet synchronous motor, which comprises a rotor yoke, a permanent magnet and a stator. The permanent magnet is attached to an inner surface of the rotor yoke, and an N pole and an S pole are distributed alternately; the stator is arranged on the inner side of the permanent magnet and comprises a stator core and a single-phase stator winding; a tooth part surface of the stator core is a curve formed by connecting a first arc section and a second arc section; an air gap is formed between the curve and the inner surface of the permanent magnet; the centre of a circle of the first arc section and the second arc section is not the rotation centre of the motor; and the air gap is non-uniform two-section air gap. As the two-section air gap is different from a one-section air gap structure of which the air gap gradually grows from the smallest part to the biggest part, the air gap of the two-section air gap gradually grows from thesmallest part to the biggest part and then to the smallest part, the starting performance of the self-start permanent magnet synchronous motor can be improved, the torque ripple is weakened, the vibration and noise level is reduced, and the operation stability is increased.

Description

technical field [0001] The invention relates to a Witte motor, in particular to a single-phase self-starting permanent magnet synchronous motor, which can improve starting performance, weaken torque ripple, reduce its vibration and noise levels, and improve its running stability. Background technique [0002] Traditional self-starting single-phase permanent magnet motors often use a topology proposed in the 1970s. Motors with this topology are also called oscillation-starting single-phase permanent magnet synchronous motors, which often use U-shaped iron cores, uneven or stepped air gaps, and two-pole structures. The coils of the stator winding are concentrated, wound separately and then set on the stator core. Permanent magnet rotors usually choose ferrite magnetic rings, because ferrite has good corrosion resistance and can work stably for a long time in liquids such as water. When applied to a pump, the permanent magnet rotor can also be set in the pump casing, and the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K21/22H02K21/02H02K3/28
Inventor 黄允凯董剑宁金龙彭飞
Owner SOUTHEAST UNIV
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