Drive motor for compressor and compressor with same

Abstract

The invention discloses a drive motor used for a compressor, and the compressor provided with the drive motor. The drive motor used for the compressor comprises a stator, a rotor and a permanent magnet fixing part; the stator is sleeved with the rotor; the rotor comprises a turning part and a plurality of permanent magnets; the turning part is configured to be cylindrical, and the turning part comprises a crankshaft connecting wall and side walls; the side walls are arranged on the upper surface or the lower surface of the crankshaft connecting wall; an annular flange extending inwardly in a radial direction is formed in one end, further from the crankshaft connecting wall, of the side wall; the multiple permanent magnets are uniformly distributed in the inner side of the side walls circumferentially; the upper end plane and the lower end plane of each permanent magnet are propped against the opposite side faces of the crankshaft connecting wall and the annular flange respectively; and the permanent magnet fixing part is used for positioning the multiple permanent magnets in the inner side of the side walls, and limiting each permanent magnet circumferentially and radially. The drive motor provided by the invention can realize the all-around limit on the permanent magnets circumferentially, radially and axially.

Description

technical field [0001] The invention relates to the field of compressors, in particular to a driving motor for a compressor and a compressor with the driving motor. Background technique [0002] With the development of the refrigeration industry, frequency conversion compressors have gradually become the mainstream of the compressor industry. At present, the motors used in frequency conversion compressors are mainly built-in permanent magnet synchronous motors. Because the rotor of the built-in motor is located inside the stator, the space is limited, so the amount of permanent magnets is limited, which is not conducive to improving the energy efficiency of the motor. In a motor disclosed in the related art, the output power of the motor is increased by increasing the axial dimension, but the increase in the axial dimension will affect the rigidity of the rotating shaft and the manufacturability of the compressor, resulting in increased noise and vibration of the compressor...

AI Technical Summary

Problems solved by technology

However, when the rotor is running at high speed or the rotor is subjected to axial force, the permanent magnet may move axially, radially or circumferentially only by bonding, resulting in large magnetic flux leakage at the end of the rotor and a decrease in the utilization rate of the magnet.

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