Brushless motor and sealed compressor having same

Abstract

This brushless motor is of a three-phase full-pitch-winding type including a stator having coils (20) inserted in slots in a one coil per one slot manner. Coil ends (21) of the coils (20) are arranged such that the first coil (201) is arranged outside the second and third coils (202, 203) in a place (A) where the second and third coils (202, 203) are inserted in a pair of slots adjacent to each other, the second coil (202) is arranged from inside of the first coil (201) to outside of the third coil (203) in a place (B) where the first and third coils are inserted in another pair of slots adjacent, and the third coil (203) is arranged inside the first and second coils (201, 202) in a place (C) where the first and second coils (201, 202) are inserted in still another pair of adjacent slots. The coil ends (21) are shaped in the axial direction. To provide a brush motor capable of restraining the height of a coil end by low vibration or the like, and a sealed compressor with small current leakage equipped with the brushless motor.

Description

technical field [0001] The present invention relates to a small, low-vibration, low-noise (hereinafter referred to as "low vibration, etc.") brushless motor and hermetic compressor mounted on various machines such as air conditioner fans, refrigerators, and automobiles. Background technique [0002] Miniaturization of equipment and low vibration are issues that must be solved during development. Of course, such problems are also faced by equipment equipped with hermetic compressors. [0003] In the motor, reducing the overall height of the stator constituting the motor is a means to achieve miniaturization. In the stator with short-distance concentric distribution winding as shown in FIG. 14 , inserting the coil 20 into the slot of the stator core 10 Finally, the height of the coil tail is suppressed by shaping from the axial direction. [0004] In addition, as other specific measures, since there is also a demand for higher efficiency of the motor, a stator with salient po...

AI Technical Summary

Problems solved by technology

[0013] This means that it is necessary to secure an insulating distance from the container in the hermetic compressor, which hinders the miniaturization of the hermetic compressor

[0014] Moreover, when the coil tail end of the entire winding section is shaped only from the radial direction of the stator, the axial height of the coil tail end increases significantly

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