Motor, fan, electric vacuum cleaner, and hand drying device

A technology for motors and rotors, which is applied in the field of electric vacuum cleaners, hand dryers, and blowers. It can solve problems such as the inability to determine the rotation of the rotor, and achieve the effect of suppressing the increase of magnetic flux density and reducing iron loss.

Pending Publication Date: 2020-06-12
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] On the other hand, when the shape of the front end of the tooth is symmetrical in the circumferential direction, it canno

Method used

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  • Motor, fan, electric vacuum cleaner, and hand drying device
  • Motor, fan, electric vacuum cleaner, and hand drying device
  • Motor, fan, electric vacuum cleaner, and hand drying device

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0032] Embodiment 1.

[0033]

[0034] figure 1 This is a cross-sectional view showing the motor 100 according to the first embodiment of the present invention. The motor 100 is a permanent magnet synchronous motor, which is a single-phase motor driven by an inverter. The motor 100 is used, for example, in the blower 110 of an electric vacuum cleaner or a hand dryer (refer to Figure 13 ).

[0035] The motor 100 has a rotor 5 having a shaft 50 and a stator 1 provided so as to surround the rotor 5. The stator 1 is fixed to the inside of a metal cylindrical frame 4.

[0036] In the following description, the center axis of the shaft 50, that is, the direction of the rotation shaft C1 is referred to as the "axial direction". In addition, the circumferential direction centered on the rotation axis C1 of the shaft 50 (in the figure 1 (Shown by arrow R1) is called "circumferential". In addition, the radial direction centered on the rotation axis C1 of the shaft 50 is referred to as "...

Example Embodiment

[0099] Implementation mode 2.

[0100] Next, the second embodiment of the present invention will be described. The motor 100A of the second embodiment includes a rotor 5A having a shaft 50A and a stator 1A surrounding the rotor 5A. The stator 1A is fixed to figure 1 The inner peripheral side of the frame 4 shown. In the second embodiment, the number of magnetic poles of the rotor 5A is two, and the yoke 11A of the stator 1A has a circular ring shape.

[0101] The rotor 5A has a shaft 50A and permanent magnets 51A and 52A fixed around the shaft 50A. The rotor 5A has two poles and has a permanent magnet 51A and a permanent magnet 52A.

[0102] The stator 1A has a stator core 10A and an insulating part 3 ( figure 1 ) And the coil. The stator core 10A is formed by laminating a plurality of laminated elements (for example, electromagnetic steel plates, etc.) in the axial direction and fixing them as a single body by caulking portions 16A, 17A, and 18A.

[0103] The stator core 10A ha...

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PUM

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Abstract

This motor is provided with a rotor having a plurality of magnetic poles and a stator disposed outside the rotor in the radial direction and having the same number of teeth as the number of magnetic poles. Each of the teeth has: a first side portion that is the end edge in a first direction of the circumferential direction; a second side portion that is an end edge in a second direction opposite to the first direction; and a tooth end facing the rotor. Each of the teeth unexceptionally has a first projection portion and a second projection portion on the tooth end side, said first projection portion projecting from the first side portion in the first direction, said second projection portion projecting from the second side portion in the second direction. The tooth end has a first end in the first direction and a second end in the second direction, wherein the distance G2 between the second end and the rotor is wider than the distance G1 between the first end and the rotor. When the line orthogonal to a radial direction line at an intermediate position between the first side portion and the second side portion and passing through the rotational axis is defined as a reference line,the distance D1 from the reference line to the boundary between the first projection portion and the first side portion is longer than the distance D2 from the reference line to the boundary between the second projection portion and the second side portion.

Description

technical field [0001] The present invention relates to a motor, a blower equipped with the motor, an electric vacuum cleaner, and a hand dryer. Background technique [0002] Generally, in an inner rotor type single-phase motor, the number of teeth of the stator matches the number of magnetic poles of the rotor. When the rotation of the motor stops, the front ends of the teeth face the magnetic pole faces of the rotor due to magnetic attraction force. At the beginning of rotation, current flows through the coils of the stator to generate a magnetic field, which rotates the rotor by magnetic repulsion. [0003] On the other hand, when the shapes of the tip portions of the teeth are symmetrical in the circumferential direction, it is impossible to specify which direction the rotor rotates in, clockwise or counterclockwise, when the stator magnetic field is generated. Then, in the motor disclosed in Patent Document 1, a tip extension portion protruding in one direction (for e...

Claims

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Application Information

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IPC IPC(8): H02K1/14
CPCH02K1/148H02K2201/03A47K10/48A47L5/24A47L9/2842A47L9/28H02K7/14H02K37/14
Inventor 土田和庆
Owner MITSUBISHI ELECTRIC CORP
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