A processing method for reducing aluminum consumption of ultra-high-efficiency motor rotor

Abstract

The invention discloses a machining method capable of reducing the aluminum consumption of an ultra-efficient motor rotor. The method comprises the following steps of 1) turning off blank aluminum on the surface of the rotor according to specified process parameters; 2) performing turning to reduce an air gap value of the outer circle of the rotor by 3 / 5-9 / 10 of a specified value according to specified process parameters; 3) performing turning to eliminate the finish turning machining allowance of 1 / 5 -1 / 10 of the air gap value of the outer circle of the rotor according to specified process parameters, wherein a feeding travel direction is opposite to rough machining directions in the first two steps. The method is convenient to machine, the efficiency of a motor is improved, the surface temperature of the rotor is reduced, and the aluminum consumption of the rotor is reduced. The method is applied to the field of motors.

Description

technical field [0001] The invention relates to the field of motors, in particular to a processing method for reducing the aluminum consumption of a rotor of an ultra-high-efficiency motor. Background technique [0002] The efficiency of a three-phase AC asynchronous motor is the ratio of output power to input power, the smaller the input power, the higher the efficiency of the motor. The difference between input power and output power is the total loss of the motor, divided into: stator copper loss, rotor aluminum loss, iron loss of silicon steel sheet, mechanical friction and wind friction loss of fan cooling combination, process fluctuations and many other uncertain factors. Additional losses are called stray losses. The cast aluminum rotor is the basic requirement of the cage induction motor. Because the liquid molten aluminum is pressed into the rotor slot, the rotor generates stress in the slot, so that the actual aluminum consumption of the motor is much higher than ...

AI Technical Summary

Problems solved by technology

After the rotor of the three-phase cage induction motor is cooled by die-casting molten aluminum, around the notch of the rotor punching plate, because it has withstood the liquid molten aluminum of up to 750 ° C, the edge stress of the silicon steel is generated in the groove due to the difference in cold and heat. This kind of stress will increase the contact resistance of the rotor, resulting in a corresponding increase in the aluminum loss of the rotor.

The result is low motor efficiency and high rotor surface temperature.

The traditional method is divided into two steps to meet the requirements: one is to turn the rough aluminum layer on the surface of the rotor; the other is to turn an air gap value between the rotor slot and the stator according to the requirements. This method produces The aluminum consumption of the rotor is relatively large

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