A Fractional Slot Concentrated Winding Pole-changing Memory Motor Without Changing the Winding Arrangement

A technology of concentrated winding and memory motor, which is applied to the shape/style/structure of winding conductors, asynchronous induction motors, electric components, etc., can solve the problems of reduced electromagnetic performance, less than ideal structural design, complex motor control, etc., to reduce the amount of consumption. , The effect of facilitating industrial mass production and simplifying the winding connection method

Active Publication Date: 2019-03-12
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Based on the research status at home and abroad, the existing research on the pole-changing memory motor is basically in the exploratory stage, and its structural design is not ideal enough. The control before and after the pole-changing of the motor is complicated, especially after the pole-changing, the electromagnetic performance is reduced.

Method used

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  • A Fractional Slot Concentrated Winding Pole-changing Memory Motor Without Changing the Winding Arrangement
  • A Fractional Slot Concentrated Winding Pole-changing Memory Motor Without Changing the Winding Arrangement
  • A Fractional Slot Concentrated Winding Pole-changing Memory Motor Without Changing the Winding Arrangement

Examples

Experimental program
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Effect test

specific Embodiment approach 1

[0047] Such as Figure 1a As shown, the three-phase fractional slot concentrated winding 2:1 (4 / 2 pole) pole-changing memory motor, the stator core 1 contains three stator teeth, and the A, B and C three-phase armature windings 2 are wound in turn, the armature winding The fractional slot concentrated winding is adopted, and the armature slot for placing the fractional slot concentrated winding is arranged between two adjacent stator teeth; the rotor is coaxial with the stator, surrounded by three stator teeth of the stator core, and the rotor has two built-in high corrections A coercive force NdFeB permanent magnet 4 and two low coercive force AlNiCo permanent magnets 5; the low coercive force AlNiCo permanent magnet is thicker than the high coercive force NdFeB permanent magnet (NdFeB) The thickness of the permanent magnet, the four permanent magnets are evenly distributed along the radial direction of the rotor, and each permanent magnet is installed in a "one" shape to form...

specific Embodiment approach 2

[0051] Such as figure 2 As shown, it is a five-phase fractional slot concentrated winding 2:1 (8 / 4 pole) pole-changing memory motor. The stator core 1 contains ten stator teeth, and the five-phase armature windings of A, B, C, D and E are wound sequentially. 2. The armature winding adopts fractional slot concentrated winding, and an armature slot for placing fractional slot concentrated winding is arranged between two adjacent stator teeth; the rotor is coaxial with the stator and is surrounded by ten stator teeth of the stator core. The rotor has four high-coercivity neodymium-iron-boron (NdFeB) permanent magnets 4 and four low-coercivity AlNiCo permanent magnets 5, and the thickness of the low-coercivity AlNiCo permanent magnets is greater than that of high The thickness of the coercivity neodymium iron boron (NdFeB) permanent magnet, eight permanent magnets are evenly distributed along the radial direction of the rotor, and each permanent magnet is installed in a "one" sha...

specific Embodiment approach 3

[0054] Such as image 3 As shown, it is a three-phase fractional slot concentrated winding 2:1 (12 / 6 pole) pole-changing memory motor. The stator core 1 contains nine stator teeth, and the A, B and C three-phase armature windings 2 are wound in sequence. The pivot winding adopts the fractional slot concentrated winding, and the armature slot for placing the fractional slot concentrated winding is arranged between two adjacent stator teeth; the rotor is coaxial with the stator, surrounded by nine stator teeth of the stator core, and the rotor has six built-in High-coercivity neodymium-iron-boron (NdFeB) permanent magnets 4 and six low-coercivity AlNiCo (AlNiCo) permanent magnets 5, the thickness of the low-coercivity AlNiCo (AlNiCo) permanent magnets is thicker than that of high-coercivity NdFeB The thickness of iron boron (NdFeB) permanent magnets, twelve permanent magnets are evenly distributed along the radial direction of the rotor, and each permanent magnet is installed in...

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Abstract

The invention discloses a pole-changing memory motor with fractional-slot concentrated windings without changing winding arrangement. The pole-changing memory motor comprises a stator and a rotor, wherein the stator comprises a stator core and armature windings; the fractional-slot concentrated windings are adopted as the armature windings and are sequentially arranged according to phase sequences; and the rotor comprises a rotor core, high-coercivity permanent magnets and low-coercivity permanent magnets. According to the pole-changing memory motor disclosed by the invention, the winding connection mode does not need to be changed before and after pole changing and only the phase sequences of two phases need to be exchanged; and in the pole changing process, magnetization directions of the low-coercivity permanent magnets are changed through applying direct-axis current pulses in different directions to the armature windings, so that changing of the number of poles of the motor is achieved. The speed range of a permanent magnet motor can be expanded through pole-changing speed regulation, the iron loss of the motor in a high-speed area can be effectively reduced and the operating efficiency of the motor in the high-speed area is improved.

Description

technical field [0001] The invention relates to a fractional slot concentrated winding pole-changing memory motor without changing the winding connection mode, which belongs to the field of motor design. Background technique [0002] Pole-changing speed regulation technology is widely used in induction motor speed regulation. Due to the relatively low power density and efficiency of induction motors, pole-changing permanent magnet motors have more extensive application value. However, for traditional permanent magnet motors, due to the limitation of the inherent properties of permanent magnet materials, the air gap magnetic field in the motor remains basically constant, and its magnetic adjustment is relatively difficult. Permanent magnet memory motor (hereinafter referred to as "memory motor") is a new type of variable flux permanent magnet motor, which uses low coercivity alnico permanent magnets, and changes the magnetization state of the permanent magnets through stator ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K1/14H02K1/27H02K1/02H02K3/28H02K17/14
CPCH02K1/02H02K1/14H02K1/2706H02K3/28H02K17/14H02K2213/03
Inventor 林鹤云王东阳辉王克羿房淑华黄允凯
Owner SOUTHEAST UNIV
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