Single-phase brushless motor and electric tool

A technology of single-phase brushless motor and starting ability, applied in the direction of electric components, electrical components, electromechanical devices, etc., can solve the problem of poor starting ability of single-phase brushless motor, achieve strong starting ability, increase starting ability, and increase positioning The effect of torque

Inactive Publication Date: 2016-11-30
JOHNSON ELECTRIC SHENZHEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the poor starting ability of single-phase brushless motors, it has been limited in some applications that require large starting torques, such as electric tools, so there is an urgent need for a single-phase brushless motor with strong starting ability

Method used

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  • Single-phase brushless motor and electric tool
  • Single-phase brushless motor and electric tool
  • Single-phase brushless motor and electric tool

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Embodiment Construction

[0026] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0027] refer to figure 1 As shown, a single-phase brushless motor 10 provided by the present invention includes a stator 20 and a rotor 30 that can rotate relative to the stator 20 . The stator 20 includes a stator core made of a soft magnetic material with magnetic properties such as a silicon rigid sheet, and a winding 28 wound around the stator core (only 3 windings are shown in the figure), and the stator core includes a yoke 21 and at least two teeth 22 extending inward from the yoke 21. The tooth 22 includes a tooth body 26 and a tooth crown 23 located at the end of the tooth body 26. The tooth crown 23 includes a first pole shoe 24 and a second pole piece extending to both sides respectively. With two pole shoes 25 , the length of the pole face of the first pole shoe 24 facing the rotor 30 is smaller than the length of the pole face of the secon...

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Abstract

The invention relates to a single-phase brushless motor and an electric tool. The motor comprises a stator and a rotor, wherein the rotor can rotate relative to the stator, the stator comprises a stator magnetic core and a winding, the stator magnetic core comprises a yoke part and at least two teeth, the at least two teeth inwards extend from the yoke part, each tooth comprises a tooth body and a tooth crown, the tooth crown is arranged at a tail end of the tooth body and comprises a first pole shoe and a second pole shoe, the first pole shoe and the second pole shoe respectively extend towards two sides, the rotor is accommodated in a space encircled by the first pole shoes and the second pole shoes of the at least two teeth, a positioning groove is formed between the first pole shoe and the second pole shoe of each tooth and faces the rotor, the positioning groove is biased towards the first pole shoe, so that a pole surface of the second pole shoe facing the rotor is larger than a pole surface of the first pole shoe facing the rotor. The single-phase motor is relatively large in starting torque and high in starting capability, the starting capability of the single-phase motor facing a direction is higher than the starting capability of the single-phase motor facing another direction, and the single-phase motor is particularly applicable for application occasions such as the electric tool.

Description

【Technical field】 [0001] The invention relates to the field of motors, in particular to a single-phase brushless motor and an electric tool using the single-phase brushless motor. 【Background technique】 [0002] Single-phase motors have the advantage of being low cost. However, single-phase brushless motors have been limited in some applications that require large starting torque due to their poor starting ability, such as electric tools. Therefore, there is an urgent need for a single-phase brushless motor with strong starting ability. 【Content of invention】 [0003] The object of the present invention is to overcome the shortcomings of the above technologies and provide a single-phase brushless motor. [0004] A single-phase brushless motor provided by the present invention includes a stator and a rotor that can rotate relative to the stator, the stator includes a stator core and a winding wound around the stator core, the stator core includes a yoke and a At least two...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K29/03H02K1/14H02K1/27
CPCH02K1/146H02K1/2766H02K29/03H02K2213/03H02K1/14H02K1/16H02K29/00
Inventor 李越张涛周垂友柴捷储俊杰左小兵
Owner JOHNSON ELECTRIC SHENZHEN
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