Brushless motor and electric device mounted with same

a permanent magnet, brushless motor technology, applied in the direction of dynamo-electric machines, magnetic circuit rotating parts, magnetic circuit shapes/forms/construction, etc., can solve the problems of vibration and noise, increase torque ripple, and speed of brushless motor cannot be increased any more, so as to reduce noise and vibration in a high-speed region, low noise, and low vibration operation

Active Publication Date: 2014-01-02
PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The technical effect of this patented technology is that it reduces noticeable sound or vibrations while still allowing for efficient use of power in high-speed operations.

Problems solved by technology

The technical problem addressed in this patent is how to efficiently operate a brushless motor with high speeds under certain conditions while reducing noise and vibrations.

Method used

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  • Brushless motor and electric device mounted with same
  • Brushless motor and electric device mounted with same
  • Brushless motor and electric device mounted with same

Examples

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Effect test

first exemplary embodiment

[0024]FIG. 1 is a diagram showing the relationship between current phase advance angle and torque ripple of a brushless motor according to the first exemplary embodiment of the present invention and a conventional brushless motor. FIG. 2 is a diagram showing a stator and a rotor of the brushless motor according to the first exemplary embodiment of the present invention. FIG. 3 is a diagram showing the rotor of the brushless motor according to the first exemplary embodiment of the present invention. FIG. 4 is an enlarged diagram of a stator slot portion of the permanent magnet brushless motor according to the first exemplary embodiment of the present invention.

[0025]As shown in FIG. 2 and FIG. 3, generally cylindrical rotor 10 is an interior permanent magnet rotor having permanent magnets embedded inside along a longitudinal direction. Rotor core 12 that forms rotor 10, which rotates around shaft 13 as an axis, is formed with a plurality of slits 14 that extend inward from vicinity of o

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Abstract

A brushless motor capable of high speed rotation by field weakening operation is designed to reduce torque ripple at a maximum load point with current phase advance so that the torque ripple at the maximum load point is 1 to 1.5 times the torque ripple at a low speed load point.

Description

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Claims

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Application Information

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Owner PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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