Single-phase motor

A single-phase motor and rotor technology, applied to synchronous motors with static armatures and rotating magnets, magnetic circuit shape/style/structure, magnetic circuit static components, etc., can solve the problem of motor efficiency reduction, motor torque ripple It can improve the output, reduce the torque ripple, and ensure the starting performance.

Inactive Publication Date: 2019-06-11
MABUCHI MOTOR
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] On the other hand, if the tooth angle is reduced, contrary to the above, although the reduction in motor output during high-speed rotation is improved, the efficiency of the motor is reduced because the interlinkage flux with the permanent magnet rotor is reduced. In addition, the following occurs: Problem: Increased torque ripple that becomes a vibration factor of the motor during driving (power-on)

Method used

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Embodiment Construction

[0035] Hereinafter, a single-phase motor as an embodiment will be described with reference to the drawings. The embodiments shown below are merely examples, and it is not meant to exclude the application of various modifications and techniques not explicitly described in the following embodiments. Each structure of this embodiment can be implemented with various modifications within the range which does not deviate from the gist. In addition, they can be selected according to need, or can be combined appropriately.

[0036] (structure)

[0037] like figure 1 As shown, this single-phase motor (hereinafter simply referred to as a motor) 1 is an inner-rotor type two-pole two-slot single-phase brushless motor having a rotor 2 arranged inside and a stator 3 arranged outside.

[0038] The rotor 2 has permanent magnets, and N poles 21 and S poles 22 are arranged on the outer periphery of the rotor 2 with a phase shift of 180 degrees. The rotor 2 revolves around the center of rota...

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Abstract

The present invention provides a single-phase motor that can improve the startability of the motor when the output of the motor is improved at the time of high-speed rotation and the torque ripple issuppressed and the torque is zero when the drive is not generated. The single-phase motor includes: a rotor (1) having a permanent magnet; and a pair of teeth (33) disposed on the outer circumferenceof the rotor (1) with a gap from the rotor (1) and having a rotor (1), a stator core (30) and a stator (3) formed by a coil (34) provided around the tooth portion, wherein a mechanical angle of the angular portion of the front end of the tooth portion (33) facing the outer circumference of the rotor, that is, a tooth angle is 40D or more and 120D or less, the position in the circumferential direction of the tooth portion set by the rotor phase when the back-induction voltage is 0 is used as the reference position, and the traveling side angle Theta 1 and the tooth after the angle region is divided at the reference position are used. The angle ratio R (=Theta 1 / Theta) of the angle Theta is 0.51 or more.

Description

technical field [0001] The present invention relates to a single-phase motor using a permanent magnet rotor. Background technique [0002] In a single-phase motor using a permanent magnet rotor, a pair of tooth portions are arranged to face each other across the rotor. Such a single-phase motor can be easily configured including a drive circuit and is relatively inexpensive, but there is a problem in starting performance in principle. Therefore, techniques for improving startability have been developed. For example, Patent Document 1 or the like discloses techniques for improving startability by eccentricizing the surface of the teeth facing the rotor or by providing recesses in the teeth. [0003] prior art literature [0004] patent documents [0005] Patent Document 1: Japanese Patent No. 3462043 Contents of the invention [0006] The problem to be solved by the invention [0007] However, in the above-mentioned single-phase motor, if the angle of the tooth portio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K21/14H02K1/12
Inventor 日下部涉
Owner MABUCHI MOTOR
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