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Unequal turn single-double-winding cast copper rotor induction motor

An induction motor, single-layer technology, applied to asynchronous induction motors, winding conductive materials, and the shape/style/structure of winding conductors, which can solve the problems of low power density and low efficiency, and achieve low additional loss and copper loss. Reduced, good starting performance

Inactive Publication Date: 2018-07-27
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Compared with other types of motors, traditional cast aluminum rotor induction motors also have the disadvantages of lower power density and lower efficiency. In order to overcome these disadvantages, it is imperative to develop induction motors with higher power density and higher efficiency.

Method used

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  • Unequal turn single-double-winding cast copper rotor induction motor
  • Unequal turn single-double-winding cast copper rotor induction motor
  • Unequal turn single-double-winding cast copper rotor induction motor

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Embodiment Construction

[0014] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0015] The invention provides an induction motor with unequal turn single-layer and double-layer winding cast copper rotors, which can save copper for stator windings, weaken 5th, 13th, 23rd or 7th, 11th harmonics, reduce motor temperature rise, and improve motor efficiency.

[0016] like figure 1 , 2 As shown, a cast copper rotor induction motor includes a stator 1, a rotor 11 and a rotating shaft 5, the rotor 11 is located in the stator 1, and there is an air gap 3 between the stator 1 and the rotor 11, and the stator 1 includes stator teeth 2. Stator slots 6, armature windings 7 and stator yoke 8, the rotor 11 includes a rotor core 10, guide bars 4 and end rings 9;

[0017] The winding type adopted by the armature winding 7 is a single-layer winding, and the upper and lower conductors of the same phase in the short-distance winding are comb...

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Abstract

The invention relates to an unequal turn single-double-winding cast copper rotor induction motor. The motor comprises a stator, a rotor and a rotating shaft, the rotor is located in the stator, an airgap is formed between the stator and the rotor, the stator comprises a stator tooth, a stator slot, an armature winding and a stator yoke, and the rotor comprises a rotor core, a guiding bar and an end ring; the motor is characterized in that the armature winding adopts a winding type of single-layer winding, the layout of each phase double-layer component s and a single-layer component d is s-d-d-s, the corresponding effective turn ratio is approximately 1:1.4:1.4:1 or 1:2.5:2.5:1, each phase winding adopts concentric connection, and three phases form delta connection. The rotor and the guiding bar adopt a pear-shaped closed groove structure with a narrow inner and a wide outer and are of straight groove structures. The motor can save copper for stator winding, weaken 5, 13, 23 or 7 and11 sub-harmonics, reduce motor temperature rising, and improve motor efficiency.

Description

technical field [0001] The invention relates to the field of induction motors, in particular to a cast copper rotor induction motor with unequal turns and double-layer windings. Background technique [0002] Existing motors generally use single-layer windings or double-layer stacked windings. Single-layer windings have the advantage of high fundamental winding coefficients, but single-layer windings cannot form short distances, and their electromagnetic performance is relatively poor. High-order harmonic content is high, and the ends are not easy to Cons neatly lined up. The double-layer winding usually adopts a 2 / 3 short-distance double-layer stacked winding form to weaken high-order harmonics. The existence of high-order harmonics increases stray loss and various additional losses, increases the heating of the winding, and reduces the efficiency of the motor. For a three-phase asynchronous motor, if a short-distance double-stacked winding is used, the fundamental winding...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K17/16H02K3/28H02K1/26H02K3/02
Inventor 程明王小虎
Owner SOUTHEAST UNIV
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