Self-adaptive dynamic balance structure of motor and adjusting method thereof

Abstract

The invention discloses a novel self-adaptive dynamic balance structure of a motor and an adjusting method thereof. A motor end panel is designed to have a first part and a second part; and the first part and the second part are spliced and can rotate relatively. On the basis of adjustment of positions of the first part and the second part, a dynamic unbalance value is reduced, so that the motor weight is not increased and the danger of shedding of a weighting block on a high-speed condition can be eliminated.

Description

technical field [0001] The invention relates to an electric motor dynamic balance adjustment structure and method, in particular to an electric motor dynamic balance self-adaptive adjustment structure and method. Background technique [0002] The current permanent magnet brushless motor rotor structure includes a shaft, a rotor core, a permanent magnet, and non-magnetic end plates placed at both ends of the rotor (such as aluminum end plates, copper end plates, austenitic stainless steel end plates, etc.), and its production process The sequence is usually as follows: the punching sheets are stacked to form a rotor core, and the rotor core is loaded into the shaft through the temperature difference method or a press machine, and the end close to the shaft shoulder must be placed in a non-magnetic end plate in advance, and the magnetic steel is loaded into the rotor core. Install the non-magnetic end plate at the other end into the magnetic steel slot. Due to the dimensional...

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Problems solved by technology

[0003] The existing method to reduce the initial dynamic unbalance is: set a number of round holes near the outer ring of the end plate, add lead or copper blocks to adjust the unbalance by adding weight, and solidify it with balance cement. The position of the round hole cannot be spread all over the end plate, so for many phase imbalances, the only way to achieve dynamic balance is to add balance cement to multiple positions, and often requires multiple adjustments, and this method will increase the weight of the motor body. The performance of the motor has a certain impact, and the above method is generally only suitable for motor applications with a maximum speed of 6000rpm or less. For motor applications with a maximum speed of 10000-20000rpm, this dynamic balance adjustment method will have copper blocks that are heavier at high speeds, The lead block or balance cement will fall off due to centrifugal force, so it is necessary to design a new structure and method for adjusting the initial dynamic balance

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