Unlock instant, AI-driven research and patent intelligence for your innovation.

Permanent magnet rotary motor and elevator device employing the same

A technology of rotating motors and permanent magnets, applied in the field of elevator devices, can solve problems such as rising costs, achieve the effects of reducing torque ripple, realizing torque ripple, and suppressing cost rise

Inactive Publication Date: 2011-01-05
HITACHI LTD
View PDF6 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In this regard, the present invention is made to solve the above-mentioned problems, and its purpose is to provide a permanent magnet type rotating electrical machine that can suppress the cost increase caused by the processing of the rotor core and reduce the torque ripple, so that it can be applied to In the case of extremely strict requirements for low torque ripple, such as the permanent magnet type rotating machine used in the hoist of the elevator

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Permanent magnet rotary motor and elevator device employing the same
  • Permanent magnet rotary motor and elevator device employing the same
  • Permanent magnet rotary motor and elevator device employing the same

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0072] use figure 1 A cross-sectional view of a permanent magnet type rotating electrical machine according to a first embodiment of the present invention will be described.

[0073] exist figure 1 Among them, the permanent magnet type rotating electrical machine 101 is an inward type rotating electrical machine, which has a coaxial shape: a cylindrical stator 102; . In the permanent magnet type rotating electrical machine 101 , the stator 102 generates a rotating magnetic field, and the rotor 103 is rotated by magnetic interaction between the stator 102 and the rotor 103 .

[0074] In this embodiment, the permanent magnet type rotating electrical machine 101 of the inner type is shown, but the present invention can also be implemented in the permanent magnet type rotating electrical machine of the outer type in the same way. And, the permanent magnet type rotating electrical machine of external transformation (refer to Figure 19 ) has a stator and a rotor similarly to th...

no. 2 approach

[0092] The permanent magnet type rotating electrical machine 101b of the second embodiment of the present invention is the same as the permanent magnet type rotating electrical machine 101 of the first embodiment except for the rotor 103 ( Figure 8 ).

[0093] use Figure 9 ~ Figure 12 The rotor 103 of this embodiment will be described in detail.

[0094] Figure 9 It is a partial perspective view showing the structure of the rotor 103 of the permanent magnet type rotating electric machine 101b. Figure 10 to represent Figure 9 A partial perspective view of the structure of the rotor core 107 and the protrusion 123 . Figure 11 It is a partially expanded view of the rotor 103 viewed from the side of the stator 102 to the radially inner side. Figure 12 to express in the Figure 8 The cross-sectional view of the structure of the permanent magnet type rotating electrical machine 101b when the position of each protrusion is provided on the opposite side to the center of e...

no. 3 approach

[0100] In the permanent magnet type rotating electrical machine 101c of the third embodiment of the present invention, except for the rotor 103, it is the same as the permanent magnet type rotating electrical machines 101, 101b of the first and second embodiments ( Figure 13 ).

[0101] use Figure 14 ~ Figure 16 The rotor 103 of this embodiment will be described in detail.

[0102] Figure 14 It is a partial perspective view of the structure of the rotor 103 of the permanent magnet type rotating electric machine 101c. Figure 15 to represent Figure 14 A partial perspective view of the structure of the rotor core 107, slots 122 and protrusions 123. Figure 16 It is a partially expanded view of the rotor 103 viewed from the side of the stator 102 to the radially inner side.

[0103] In the rotor 103, a permanent magnet 106 is attached axially on the magnet bonding surface 121 of the rotor core 107, and the groove 122 is adjacent to the magnet bonding surface 121, so that...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The present invention provides a permanent magnet rotary motor and an elevator device employing the same, wherein the permanent magnet rotary motor is capable of restraining rise cost due to a rotor core and reducing torque pulsation. The permanent magnet rotary motor includes a stator and a rotor, the stator is provided with a stator core and a stator winding, the stator core is provided with a plurality of stator projecting poles radially, the stator winding is accepted in narrow slits, each of which is formed between two neighboring stator projecting poles, the rotor includes the rotor core and multiple permanent magnets, the permanent magnets are arranged on the surface of the rotor with an equal interval around the rotor core, the rotor is characterized in that the permanent magnets are parallel to the axial direction of the rotor, and circumferential distribution of magneto resistance of a clearance between the rotor and the stator is varied along the axial direction of the rotor.

Description

technical field [0001] The invention relates to a permanent magnet type rotating electrical machine and a lift device using the same. Background technique [0002] In a permanent magnet type rotating electric machine, torque ripple due to cogging torque or torque ripple generated at the time of energization becomes a problem. In particular, in the permanent magnet type rotating electric machine used in the hoisting machine of the elevator, low torque ripple (approximately 1% in p-p) in a wide range from the rated torque to the maximum torque is achieved. , so the problem is deeper. As a countermeasure against torque ripple, it is generally widely used to skew a stator or a rotor by using a semi-conical permanent magnet or the like. [0003] In particular, Patent Documents 1 and 2 disclose techniques for skewing a rotor having a surface magnet type structure in which permanent magnets are pasted on the surface of a rotor core. In the permanent magnet type rotating electric...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H02K21/12H02K1/27
Inventor 北村英树北村正司角川滋二瓶秀树
Owner HITACHI LTD