Four-stage iron core cast-aluminum rotor with skewed slot structure, stator and motor

Abstract

The present invention discloses a four-stage iron core cast-aluminum rotor with a skewed slot structure. The number of slots of the rotor is the same as the number of slots of the stator; the rotor comprises a rotor iron core, a rotation shaft and a conducting bar; the rotation shaft is sleeved with the rotor iron core; the slot body of the iron core is in a skew shape, the conducting bar is casted in the slot body of the iron core; the iron core comprises a second iron core and a third iron core located at the middle position, and a first iron core and a fourth iron core which are respectively located at two ends; each two slot bodies having opposite positions of the first iron core, the second iron core, the third iron core and the fourth iron core are reversely skewed to be a herringbone shape; an intermedium ring is arranged between the second iron core and the third iron core; the two slot bodies having opposite positions of the second iron core and the third iron core are malposed and reversely skewed; and the bottom portions of the slot bodies are bifurcation structures. The present invention further discloses a stator matching the rotor and a motor. The four-stage iron core cast-aluminum rotor with a skewed slot structure, the stator and the motor effectively weaken tooth harmonic, reduce synchronous additional torque and reduce the additional loss of the motor.

Description

technical field [0001] The invention relates to the technical field of electromagnetic devices, in particular to a four-segment iron core cast aluminum rotor with a chute structure, a stator and a motor. Background technique [0002] The additional loss of the induction motor is mainly caused by the air-gap harmonic flux. These harmonic fluxes produce high-frequency losses (surface loss and tooth pulse loss) in the stator and rotor cores, and high-frequency current losses in the cage rotor, among which the harmonic flux of the stator and rotor teeth is the most significant. . [0003] When the number of stator and rotor slots is equal, the potentials induced by the harmonic flux of the stator teeth in the adjacent bars of the rotor are equal in magnitude and phase, so no current will be generated between them, which indicates that when the slots are matched, the stator Tooth harmonic flux does not generate high frequency current losses in the rotor. At the same time, the ...

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Problems solved by technology

[0004] When selecting the induction motor slot fit, from the perspective of reducing additional loss, the number of stator and rotor slots should be as close as possible. From the above description, it can be seen that when the number of stator and rotor slots is the same, the value of additional loss is the smallest, but equal slot fit is the motor A no-no in design, as this would cause synchronous additional torque at zero speed, preventing the motor from starting

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