High-stability high-efficiency three-phase high-speed motor

Abstract

The invention discloses a high-stability high-efficiency three-phase high-speed motor which comprises a motor casing, a rotor assembly, a bearing assembly, an impeller assembly and a stator assembly.The axis of the motor casing is arranged vertically; the rotor assembly comprises a rotating shafts and annular permanent magnets in the two poles; the impeller assembly is fixedly arranged in the upper end of the rotating shaft in a penetrating way; and the stator assembly comprises a stator casing, a stator, an insulating layer, a cup type winding, a backing plate, a PCB and a needle stand, thestator is fixedly mounted in the inner wall of the stator casing and is composed of silicon steel plates connected together, and the silicon steel plates are arranged coaxially and sequentially stacked from top to bottom. According to the motor, torque output is much more stable, the alternating frequency of the magnetic field is halved, and eddy current loss and hysteresis loss are lower; in themagnetic circuit structure, magnetic flux leakage is lower, the effective magnetic flux utilization rate is higher, and the motor output power and the output power are improved; and an air gap is uniform, and electromagnetic noise and vibration and useful power loss caused by higher harmonic waves are reduced.

Description

technical field [0001] The invention belongs to the technical field of high-speed permanent magnet motors, and more particularly, relates to a high-stable and high-efficiency three-phase high-speed motor. Background technique [0002] High-speed motors are widely used in household appliances, medical equipment, engraving, spraying and other fields. Compared with medium and low-speed power motor solutions, high-speed or ultra-high-speed motors can often subvert consumers' perception of traditional products. In most applications, the space size of the end product is getting higher and higher, which requires that the miniaturized high-speed motor can still obtain the expected output power. In addition, the high-speed motor with low vibration and low noise will make the product more favored by customers. [0003] At present, the power motors installed in household electrical products, such as hair dryers, air purifiers, and vacuum cleaners, usually use permanent magnet single-p...

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Problems solved by technology

[0004] Patents with application numbers 201611140022.3, 201611140021.9, and 201611141825.0 all disclose the technology of single-phase permanent magnet brushless motors. These single-phase permanent magnet brushless motors are simple in structure and easy to manufacture, but the inherent cogging torque causes obvious fluctuations in output torque , it is easy to cause obvious vibration and noise, and the inherent properties of single-phase motors make it impossible to obtain output power greater than that of three-phase motors

[0005] For the three-phase permanent magnet brushless motor with cogged structure, it is limited by the winding structure, and has no advantage in the demand for product miniaturization, especially under low voltage conditions, the winding slot fill rate is lower (the winding enameled wire is thicker) , and the cogging torque of the three-phase permanent magnet brushless motor is still obvious, which cannot meet the high requirements of low vibration and low noise

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