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Single-phase brushless motor

A single-phase brushless motor and stator technology, applied in electric components, electrical components, electromechanical devices, etc., can solve the problem of large cogging torque, low operating efficiency, magnetic surface-mounted single-phase brushless DC motor torque problems such as low density, to achieve the effect of reducing cogging torque and reducing the degree of non-uniformity

Inactive Publication Date: 2016-09-07
JOHNSON ELECTRIC SHENZHEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the magnetic steel surface-mounted single-phase brushless DC motor used in range hoods has low torque density and low operating efficiency. Grooves are provided on the inner peripheral surface of the stator core with 100 teeth. The formed air gap between the stator and the rotor is larger than the air gap between the stator and the rotor in other parts, so the cogging torque is larger and the noise is larger

Method used

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  • Single-phase brushless motor
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Embodiment Construction

[0039] In order to further illustrate the technical means adopted by the present invention and its effects, the following describes in detail in conjunction with preferred embodiments of the present invention and accompanying drawings.

[0040] Please also see Figure 3-Figure 7 One embodiment of the present invention provides a single-phase brushless DC motor, including a stator and a rotor that can rotate relative to the stator. The winding 5 on the core 3, the stator core 3 includes an annular yoke 31 and a number of teeth 32 extending inward from the yoke 31, the ends of the teeth 32 away from the yoke 31 form a crown 321 extending in the circumferential direction, adjacent teeth The crowns 321 of the teeth 32 are connected to each other to form an annular portion 33 , and the windings 5 ​​are wound on the winding portions of the corresponding teeth 32 . The rotor is housed in the annular portion 33 of the stator core 3. The rotor includes a rotor core 6 made of magnetica...

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Abstract

The invention provides a single-phase brushless motor including a stator and a rotor, the stator includes a stator magnetic core (3) and a winding (5) winding on the stator magnetic core (3), the stator magnetic core (3) includes a circular yoke part (31) and teeth (32) extending inward from the yoke part (31), the tail ends, far away from the yoke part (31), of the teeth (32) form crowns (321) extending circumferentially, the crowns (321) of the adjacent teeth (32) are connected to each other to form a circular part (33), the winding winds the corresponding teeth (32), the circular part (33) of the stator magnetic core (3) receives the rotor which includes a rotor magnetic core (6) and permanent-magnet poles (71), the rotor magnetic core (6) includes a plurality of accommodating grooves (61), each permanent-magnet poles (71) is arranged in the corresponding accommodating groove (61), and the positions, corresponding to the accommodating grooves (61), on the outer peripheral face of the rotor magnetic core (6) are provided with slots (62). The single-phase brushless motor is high in running efficiency and low in cogging torque.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a single-phase brushless motor. Background technique [0002] Motors are devices that convert electrical energy into mechanical energy using the principle of electromagnetic induction, and are widely used in various electrical equipment required for industrial production and daily life. [0003] Existing motors can be divided into DC motors and AC motors. Among them, brushless DC motors are widely used, such as household appliances, automobiles, industrial control, automation, aerospace and other fields. [0004] A brushless DC motor is a motor without brushes and a commutator. The existing brushless DC motor is a typical mechatronics product, which usually has a sensor in addition to the stator and the rotor. [0005] According to the number of phases of the stator winding coil of the brushless DC motor, the brushless DC motor is divided into a single-phase brushless DC motor a...

Claims

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Application Information

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IPC IPC(8): H02K29/03H02K1/27H02K1/14
CPCH02K1/146H02K1/274H02K29/03H02K2213/03H02K2201/03
Inventor 李越周垂有李刚王勇李勇
Owner JOHNSON ELECTRIC SHENZHEN