Single-phase self-start permanent magnet synchronous motor

A permanent magnet synchronous motor, self-starting technology, applied to synchronous motors with stationary armatures and rotating magnets, synchronous machine parts, shape/style/structure of winding conductors, etc., can solve complex controllers and sensors, Increase manufacturing costs and other issues, achieve the effect of improving running stability, improving starting performance, and improving running stability

Active Publication Date: 2013-03-20
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 explained below in conjunction with the 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 magnetic permeability The permanent magnet 2 is affixed to 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 core 3 and a single-phase stator winding 4, the number of stator teeth and the number of rotor poles are the same (both are six). The tooth surface of the stator core 3 is a curved surface formed by connecting the first arc 7 and the second arc 8, and there is an air gap between the curved surface and the inner surface of the permanent ...

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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 the smallest 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 Witt motor, in particular to a single-phase self-starting permanent magnet synchronous motor, which can improve starting performance, weaken torque pulsation, reduce its vibration and noise level, and improve its running stability. Background technique [0002] Traditional self-starting single-phase permanent magnet motors often use a topology proposed in the 1970s. This kind of topology motor is also called oscillation start single-phase permanent magnet synchronous motor, and often adopts U-shaped iron core, uneven or stepped air gap, and two-pole structure. The stator winding coils are centralized, which are individually wound 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 in liquids such as water for a long time. When applied to a pump, the permanent magnet rotor can also be set in the pump casing, and the impel...

Claims

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Application Information

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Patent Type & Authority Patents(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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