Rotor structure of three-phase asynchronous motor

Abstract

The invention relates to a rotor structure of a three-phase asynchronous motor. The rotor structure comprises a cast-aluminum rotor main body, wherein an iron core is arranged in the middle of the cast-aluminum rotor main body, and overlapped rotor punching is arranged outside the iron core. The rotor structure is characterized in that the cast-aluminum rotor main body is symmetrically divided into a left rotor and a right rotor from the middle part; connecting parts are arranged on opposite sides of the left rotor and the right rotor respectively; and the left rotor and the right rotor are connected through the connecting parts. The rotor structure of the three-phase asynchronous motor is simple in structure, and the iron core is divided into two sections, so that the length is shortened; two sections of the cast-aluminum rotor are combined after processed, so that the cast-aluminum process cannot be influenced and can be controlled well; and further, the cost is low, and the qualified rate is high.

Description

technical field [0001] The invention relates to a rotor structure of a three-phase asynchronous motor, in particular to a cast aluminum rotor for a high-voltage and low-voltage three-phase asynchronous motor (such as a Y2-500X-8-900KW motor). Background technique [0002] In the prior art, when the three-phase asynchronous motor is designed, the power of the same base is getting bigger and bigger, so the designed core length will be longer and longer (such as figure 1 As shown); and when the iron core is too long, the processability of cast aluminum is limited, such as shrinkage cavity, insufficient cast aluminum, broken aluminum and other defects are prone to occur; in this way, the qualified rate of cast aluminum is not high, resulting in relatively large losses. [0003] The rotor is a key component in the motor. If its material and casting aluminum process are not well controlled, the motor is prone to defects such as electromagnetic noise, current instability, increased...

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Problems solved by technology

[0002] In the prior art, when the three-phase asynchronous motor is designed, the power of the same base is getting bigger and bigger, so the designed iron core length will be longer and longer (such as figure 1 As shown); and when the iron core is too long, the processability of cast aluminum is limited, such as shrinkage cavity, insufficient cast aluminum, broken aluminum and other defects are easy to occur; in this way, the pass rate of cast aluminum is not high, and the loss is relatively large

[0003] The rotor is a key component in the motor. If its material and casting aluminum process are not well controlled, the motor is prone to defects such as electromagnetic noise, current instability, increased rotor loss, and temperature rise.

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