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Brushless double-feedback motor of winding rotor

A technology of doubly-fed motors and wound rotors, which is applied to asynchronous induction motors, electromechanical devices, electrical components, etc., and can solve the problems of slot space utilization, effective conductor utilization of rotor windings, low winding coefficients, etc.

Inactive Publication Date: 2012-04-11
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a brushless double-fed motor with wound rotors, which solves the problems of the existing brushless double-fed motors with wound rotors such as slot space utilization, effective conductor utilization of rotor windings and low winding coefficients.

Method used

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  • Brushless double-feedback motor of winding rotor
  • Brushless double-feedback motor of winding rotor
  • Brushless double-feedback motor of winding rotor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] Including the stator and the rotor, the stator has independent power windings and control windings, and the power windings and control windings are pole pairs p 1 = 2, p 2 = 4 three-phase symmetrical windings; 84 rotor slots are evenly distributed along the circumference on the rotor core, and there are 3-phase rotor windings on the rotor core, and each phase rotor winding has 2 parallel branches, and each parallel branch is composed of two coil groups ,

[0071] In the parallel branch, the first coil group has two coils with different numbers of turns, both of which adopt the first pitch y 1 =11, the total number of coils is 9, and the number of turns of each coil is 14 and 22 respectively; the second coil group has 2 kinds of coils with different numbers of turns, both of which adopt the second pitch y 2 =14, the total number of coils is 4, and the number of turns of each coil is 2 and 7 respectively; the coils in the first coil group are connected in series, the co...

Embodiment 2

[0078] Including the stator and the rotor, the stator has independent power windings and control windings, and the power windings and control windings are pole pairs p 1 = 2, p 2 = 4 three-phase symmetrical windings; 84 rotor slots are evenly distributed along the circumference on the rotor core, and there are 3-phase rotor windings on the rotor core, and each phase rotor winding has 2 parallel branches, and each parallel branch is composed of three coil groups ,

[0079] In the parallel branch, the first coil group has 4 coils with different numbers of turns, all using the first pitch y 1 = 11, the total number of coils is 10, and the number of turns of each coil is 2, 15, 18 and 21 respectively; the second coil group has 2 kinds of coils with different numbers of turns, all adopting the second pitch y 2 = 14, the total number of coils is 4, and the number of turns of each coil is 2 and 3 respectively; the third coil group has coils with one type of turns, and the third pit...

Embodiment 3

[0086] Including the stator and the rotor, the stator has independent power windings and control windings, and the power windings and control windings are pole pairs p 1 = 2, p 2 = 4 three-phase symmetrical windings; 84 rotor slots are evenly distributed along the circumference on the rotor core, and there are 3-phase rotor windings on the rotor core, and each phase rotor winding has 2 parallel branches, and each parallel branch is composed of two coil groups ,

[0087] In the parallel branch, the first coil group has 4 coils with different numbers of turns, all of which adopt the first pitch y 1 =12, the total number of coils is 10, and the number of turns of each coil is 5, 13, 15 and 21 respectively; the second coil group has 2 kinds of coils with different numbers of turns, all adopting the second pitch y 2 =14, the total number of coils is 8, and the number of turns of each coil is 3 and 4 respectively; the coils in the first coil group are connected in series, the coil...

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Abstract

The invention discloses a brushless double-feedback motor of a winding rotor, which belongs to winding rotor motors. The problems of low slot space utilization rate, effective conductor utilization rate of a rotor winding and winding coefficient of a traditional brushless double-feedback motor of the winding rotor are solved. A power winding and a control winding which are mutually independent are arranged on a stator; Z rotor slots and m phase rotor windings are distributed on a rotor core; each phase rotor winding is provided with a parallel branches; each parallel branch consists of two or three coil groups; first, second and third pitches which are different are respectively adopted in coils with different turn numbers in the first, second and third coil groups; the coils in each coil group are connected in series; and each coil group is in short-circuit connection. The turn number of each winding coil can be flexibly adjusted; the slot space utilization rate, the effective conductor utilization rate of the rotor winding and the winding coefficient can be improved by 5 to 15 percent; and other harmonic waves are inhibited and the content of the harmonic waves is reduced to the maximal degree.

Description

technical field [0001] The invention belongs to a wound rotor motor, in particular to a wound rotor brushless double-fed motor, the rotor of which adopts coil structures with unequal pitches and unequal turns. Background technique [0002] Brushless doubly-fed motors have broad application prospects in large-capacity AC frequency conversion speed regulation, marine shaft power generation, hydropower generation and wind power generation. The structure is simple, durable, and brushes and slip rings are eliminated on the rotor, so the operation is safe and reliable. The maintenance cost is low, and its biggest advantage is that the capacity of the required frequency converter is small, which can reduce the system cost. The brushless double-fed motor is an AC induction motor composed of two sets of stator windings and rotors with different pole pairs. The two sets of stator windings are called power windings and control windings. rotor. The basic principle of the brushless dou...

Claims

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Application Information

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IPC IPC(8): H02K17/12H02K3/28
Inventor 王雪帆熊飞
Owner HUAZHONG UNIV OF SCI & TECH
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