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Brushless direct current motor

A brushed DC motor and rotor technology, applied in electromechanical devices, electrical components, electric components, etc., can solve problems such as large vibration and noise, and insufficient torque

Active Publication Date: 2012-06-20
LG ELECTRONICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, various methods according to the prior art cannot obtain sufficient torque, or generate large vibration and noise

Method used

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  • Brushless direct current motor
  • Brushless direct current motor
  • Brushless direct current motor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0034] Embodiments of the present invention are described in detail with reference to examples shown in the accompanying drawings.

[0035] figure 1 is a perspective view of an outdoor unit to which a fan motor according to an embodiment is applicable, and figure 2 for figure 1 An exploded perspective view of the internal components of the outdoor unit. exist figure 2 Other components not shown in the outdoor unit, such as the heat exchanger.

[0036] refer to figure 1 and figure 2 , the outdoor unit 10 includes: at least one outdoor unit casing 12 defining an outer frame, an outdoor heat exchanger 11 for performing heat exchange, a top cover 13 for guiding the airflow discharged from the top of the outdoor unit casing 12, and a compressor for compressing the coolant. machine (not shown). Inside the outdoor unit 10, a fan motor 17 and a fan 16 are also provided to form a forced wind tunnel inside the outdoor unit.

[0037] The top cover 13 has an approximately circu...

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PUM

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Abstract

Provided are a motor and a rotor for the motor, which can reduce a cogging torque and a torque ripple while providing a maximum back EMF coefficient, thereby achieving a smooth rotation of a rotor and obtaining a large torque. Also, embodiments provide a motor, which can provide a good formability of a rotor, an improved manufacturing yield, and an improved operation performance. The BLDC motor includes a stator, a plurality of teeth around which a coil is wound at an inside of the stator, a rotor spaced at an inside of the stator, a plurality of magnets inserted into an edge portion of the rotor, a first barrier and a second barrier formed by extending a magnet placement portion, into which the magnet is inserted, toward both sides, and at least one or more third barriers formed at a gapportion between the first barrier and the second barrier.

Description

technical field [0001] The present invention relates to a fan motor, a brushless direct current (BLDC) motor, and a rotor for a BLDC motor. Background technique [0002] The BLDC motor is a brushless motor having a stator in which a plurality of salient poles are formed and around which a coil is wound, and a rotor disposed inside the stator and mounted with magnets. [0003] Among various BLDC motors, an internal permanent magnet (IPM) type BLDC motor is a motor in which magnets are installed inside a rotor. A back electromotive force (EMF) coefficient and a cogging torque are significantly different depending on the installation position of the magnet and the shape of the rotor through which the magnetic field lines of the magnet pass. [0004] The back electromotive force is a factor for evaluating the performance of the BLDC motor, and is a factor for evaluating the torque component generated by the lines of magnetic force generated by the magnet. Cogging torque is the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K29/00H02K1/27
CPCH02K1/2766H02K1/28H02K7/14H02K29/03
Inventor 李炅勋
Owner LG ELECTRONICS INC