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Annular single concentrated winding low-cost high-power-density permanent magnet motor

A high power density, permanent magnet motor technology, applied in the shape/style/structure of the winding conductor, the static parts of the magnetic circuit, the shape/style/structure of the magnetic circuit, etc., can solve the problem of high slot fullness and improve efficiency , reduce the length, and facilitate the effect of heat dissipation

Active Publication Date: 2015-12-30
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In order to solve the above problems, the present invention proposes a low-cost, high-power-density permanent magnet motor with an annular single concentrated winding. The stator of the permanent magnet motor has only one set of stator armature windings, and only one set of electric motors is placed in each slot of the motor. Pivot winding, interphase insulation is not required in the slot, the slot fullness rate is high, and the motor winding off-line process is simple, the whole cost is lower than the existing three-phase induction motors and permanent magnet motors; at the same time, the present invention only has one set when running The armature winding passes AC current, so the control circuit of the motor only needs two power electronic power switching devices, which changes the existing three-phase and above armature windings on the stator of various induction motors and permanent magnet motors, requiring at least 6 The status quo of power electronic power switching devices effectively reduces the number of power switching devices, reduces the possibility of failure of power switching devices in the motor control circuit, and improves reliability.

Method used

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  • Annular single concentrated winding low-cost high-power-density permanent magnet motor
  • Annular single concentrated winding low-cost high-power-density permanent magnet motor
  • Annular single concentrated winding low-cost high-power-density permanent magnet motor

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Embodiment 1

[0059] Such as image 3 As shown, the number of stator teeth of the motor is 8, the number of rotor teeth is 4, and the number of permanent magnet blocks is 4. This embodiment includes a stator, a rotor and a main air gap. The stator includes a stator core, a permanent magnet and a stator slot, and the stator core includes a stator core. Teeth 1, stator back yoke 2 and stator slot yoke 3, the stator core is made of ferromagnetic material with high magnetic permeability, the stator core is provided with stator slots, the stator slot is armature slot 4, and the armature slot 4 is placed with Armature winding 5, the armature winding 5 is a simple concentrated winding, penetrates from an armature slot 4, and passes out along the outer side of the stator back yoke 2 in the outer diameter direction to form a coil, and the armature winding surrounds the stator slot yoke 3. The permanent magnet 6 and the stator back yoke 2 are wound. The winding structure is simple and the off-line pr...

Embodiment 2

[0062] Such as Figure 4As shown, the number of stator teeth of the motor in this embodiment is 8, the number of teeth of the rotor is 4, and the number of permanent magnet blocks is 12. This embodiment includes a stator, a rotor, and a main air gap. The core includes stator teeth 1, stator back yoke 2 and stator slot yoke 3. The stator core is made of ferromagnetic material with high magnetic permeability. The stator core is provided with stator slots. The stator slots are armature slots 4 and armature slots 4 The armature winding 5 is placed inside, and the armature winding 5 is a simple concentrated winding, which penetrates from an armature slot 4 and passes out along the outer side of the stator back yoke 2 in the direction of the outer diameter to form a coil, and the armature winding surrounds The stator slot yoke 3, the permanent magnet 6 and the stator back yoke 2 are wound. The winding structure is simple and the off-line process is simplified. When the diameter of t...

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Abstract

The invention discloses an annular single concentrated winding low-cost high-power-density permanent magnet motor. An even number of stator teeth are uniformly arranged on a stator; stator grooves are formed in every two adjacent stator teeth; a permanent magnet is arranged between each stator groove yoke and each stator back yoke; a main air gap is arranged between each stator tooth and the corresponding rotor tooth of a rotor; magnetic flow generated by the permanent magnets enters the rotor via the main air gaps to form main magnetic flow; the permanent magnets do not rotate along with the rotor; the magnetizing directions of the permanent magnets on the same stator back yoke are the same; the magnetizing directions of the permanent magnets on two adjacent stator back yokes are opposite; a set of armature winding is mounted in each stator groove; through controlling current size and direction of the set of armature winding, an armature current magnetic field and magnetic fields generated by the permanent magnets interact to change the magnetic flux on the stator teeth, and magnetic resistance between the stator and the rotor changes to generate torque. According to the invention, only one set of armature winding is arranged, the current size and direction of the set of armature winding are controlled only during operation, and a power circuit only needs two power switching elements.

Description

technical field [0001] The invention relates to a permanent magnet motor with low cost and high power density with annular single concentrated winding. Background technique [0002] In recent years, with the improvement of high temperature resistance and price reduction of permanent magnet materials, permanent magnet motors have been more widely used in national defense, industrial and agricultural production, and daily life, and are moving towards high power, high performance and miniaturization. direction of development. At present, the power of permanent magnet motors ranges from a few milliwatts to several thousand kilowatts, and its application ranges from toy motors, industrial applications to large permanent magnet motors for ship traction, and has been widely used in various aspects of the national economy, daily life, military industry, and aerospace. widely used. [0003] Conventional AC permanent magnet motors are usually divided into the following categories: a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K3/28H02K1/17H02K1/16H02K1/34
Inventor 王道涵
Owner SHANDONG UNIV