Brushless direct current motor with internal and external rotors and without core losses

A brush DC motor, ironless technology, applied in the direction of electrical components, electromechanical devices, magnetic circuit rotating parts, etc., can solve the problems of stator core loss, large motor core loss, torque ripple, etc., and achieve weak armature response , Eliminate core loss, eliminate cogging effects

Inactive Publication Date: 2011-04-13
北京奇峰聚能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the traditional brushless DC motor is used in high-speed rotation occasions, the core loss of the motor is large and the efficiency is low
In addition, due to the existence of stator cogging, when the rotor rotates at high speed, cogging torque and tooth harmonics will be generated, which

Method used

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  • Brushless direct current motor with internal and external rotors and without core losses
  • Brushless direct current motor with internal and external rotors and without core losses
  • Brushless direct current motor with internal and external rotors and without core losses

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Embodiment Construction

[0014] The technical scheme of the present invention is described in detail below in conjunction with accompanying drawing:

[0015] The invention provides a brushless DC motor without iron core loss (such as figure 1 shown), including an outer Halbach magnet (101), a hollow cup stator (102) composed of windings and a skeleton, an inner Halbach magnet (103), a rotor shaft (104) and a magnetic isolation sleeve (105). Both the outer Halbach magnet (101) and the inner Halbach magnet (103) are connected to the rotor shaft (104) through a magnetic isolation sleeve (105), so that the outer Halbach magnet (101) and the inner Halbach magnet (103) are aligned with the rotor shaft ( 104) rotate synchronously, and the hollow cup (102) stator is installed and fixed on the casing (106). The inner diameter of the outer Halbach magnet (101) is greater than the outer diameter of the inner Halbach magnet (103), and both are installed on the inner surface of the magnetic isolation sleeve (105...

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Abstract

The invention provides a brushless direct current motor without core losses, comprising outer Halbach magnets, inner Halbach magnets, a rotor shaft and coreless stators formed by windings and frameworks, wherein the outer Halbach magnets and the inner Halbach magnets are connected on the rotor shaft by magnet isolating sleeves so that the outer Halbach magnets and the inner Halbach magnets rotate synchronously with the rotor shaft; the coreless stators are installed and fixed on casings; the outer Halbach magnets, the coreless stators, the inner Halbach magnets and the air gaps among the magnets and the coreless stators form closed magnetic circuits; and sinusoidal magnetic fields with high density are formed between the outer Halbach magnets and the inner Halbach magnets. The motor provided by the invention removes the stator cores and the rotor cores so that the rotors do not have core losses at any working speed, thus radically solving the problem of core losses, and the motor simultaneously has the advantages of light weight, low power consumption, reliable structure and the like.

Description

Technical field: [0001] The invention relates to a brushless direct current motor, in particular to a brushless direct current motor without iron core loss, which can be applied to occasions such as high speed and low power consumption. Background technique: [0002] The body of a traditional brushless DC motor mostly contains a stator core and a rotor core. When the motor is running, the magnetic field in the stator core and the rotor core changes alternately, resulting in hysteresis loss and eddy current loss, and these losses increase with the increase of the rotor rotation frequency. And surge. When the traditional brushless DC motor is used in high-speed rotating occasions, the core loss of the motor is large and the efficiency is low. In addition, due to the existence of stator cogging, when the rotor rotates at high speed, cogging torque and tooth harmonics will be generated, which will cause a certain pulsation of torque and cause a part of loss. Although the non-c...

Claims

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Application Information

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IPC IPC(8): H02K29/08H02K1/27H02K1/12
Inventor 蒋涛
Owner 北京奇峰聚能科技有限公司
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