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Integral type steel magnet of high-performance permanent magnetic synchronous motor

A permanent magnet synchronous motor, high-performance technology, applied in synchronous machine parts, magnetic circuit shape/style/structure, magnetic circuit rotating parts, etc. Demagnetization and other problems can reduce production costs, improve the effect of magnetization, and improve the effect of excitation

Inactive Publication Date: 2012-10-31
SHANDONG CHENGRUI NEW ENERGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The shortcomings of the "V"-shaped layout magnets used in this permanent magnet synchronous motor are: first, due to the use of rare earth materials, and rare earth resources are limited, the cost has risen linearly in recent years, resulting in high-performance permanent magnet synchronous motors. The cost of the magnetic steel increases; the second is that there is a large gap between adjacent flat magnetic steels arranged in a "V" shape, especially when ferrite magnetic steel with a low magnetic energy product is used, because the magnetization direction of the magnetic steel is thicker , after the flat magnets are arranged in a "V" shape, the gap is larger, the space utilization rate is extremely low, the magnetic concentration effect is poor, and the edge of the magnet is easily demagnetized, which affects the efficiency of the motor

Method used

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  • Integral type steel magnet of high-performance permanent magnetic synchronous motor
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  • Integral type steel magnet of high-performance permanent magnetic synchronous motor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] figure 1 , figure 2 An example is given; image 3 A schematic diagram of the rotor for a 4KW high-performance permanent magnet synchronous motor is given; Figure 4 A schematic diagram of a rare-earth material "V"-shaped rotor currently used in a 4KW high-performance permanent magnet synchronous motor is given. The integral magnet of the high-performance permanent magnet synchronous motor includes a flat magnet 1, which is characterized in that: the left edge of the flat magnet 1 is provided with an angle θ with the flat magnet 1 1 , and connected as one left flat magnetic steel 2; the right edge of the flat magnetic steel 1 is provided with an angle θ with the flat magnetic steel 1 2 , and connected as one right flat magnet 3; the midline of the flat magnet 1 intersects the midline of the left flat magnet 2 and the midline of the right flat magnet 3 on a straight line; the flat magnet 1, The left flat magnet 2 and the right flat magnet 3 are pressed and sintered a...

Embodiment 2

[0027] The invention is applied to the rotor of a 6KW high-performance permanent magnet synchronous motor. Its structure and method of use are the same as in Example 1. What has been changed is that according to the requirements of a 6KW high-performance permanent magnet synchronous motor, the thicknesses of the flat magnet 1, the left flat magnet 2 and the right flat magnet 3 are both 7mm; the included angle θ 1 and angle θ 2 Equal, both 124.5 degrees. In the operation comparison of the motor, the rated current is reduced by 6.1%; the efficiency is increased by 7.98%.

Embodiment 3

[0029] The invention is applied to the rotor of the 8KW high-performance permanent magnet synchronous motor. Its structure and method of use are the same as in Example 1. The changes, according to the requirements of the 8KW high-performance permanent magnet synchronous motor, the thickness of the flat plate magnet 1, the left flat magnet 2 and the right flat magnet 3 are both 8mm; the included angle θ 1 and angle θ 2 Equal, both 125.5 degrees. In the operation comparison of the motor, the rated current is reduced by 7.3%; the efficiency is increased by 8%.

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Abstract

The invention discloses an integral type steel magnet of a high-performance permanent magnetic synchronous motor. The integral type steel magnet comprises a flat-plate-shaped steel magnet, and is characterized in that a left flat-plate-shaped steel magnet which forms an included angle theta1 with the flat-plate-shaped steel magnet and is integrally connected with the flat-plate-shaped steel magnet is arranged at the left edge of the flat-plate-shaped steel magnet; a right flat-plate-shaped steel magnet which forms an included angle theta2 with the flat-plate-shaped steel magnet and is integrally connected with the flat-plate-shaped steel magnet is arranged at the right edge of the flat-plate-shaped steel magnet; the central line of the flat-plate-shaped steel magnet is intersected with the central lines of the left flat-plate-shaped steel magnet and the right flat-plate-shaped steel magnet on a straight line; and the flat-plate-shaped steel magnet, the left flat-plate-shaped steel magnet and the right flat-plate-shaped steel magnet are made of a ferrite material and are integrally pressed and sintered. By the integral type steel magnet of the high-performance permanent magnetic synchronous motor, the production cost of the steel magnet is reduced, the magnetism gathering effect is improved, gaps between adjacent flat-plate-shaped steel magnets are avoided, the excitation effect of a rotor of the permanent magnetic synchronous motor and the power density of the motor are effectively improved, and the aim of replacing a rare earth material is fulfilled.

Description

[0001] technical field [0002] The invention relates to an improvement of a magnet, in particular to an integral magnet of a high-performance permanent magnet synchronous motor. Background technique [0003] The magnetic steel is a component mounted on the rotor core as the magnetic poles of the rotor. According to different needs, the magnetic steel currently used mainly has a cylindrical shape, a rhombus shape, a tile shape, and a square shape. The materials used are mainly rubidium iron stilbium rare earth materials and ferrite materials. With the continuous development of motor control technology, the use of high-performance permanent magnet synchronous motors is becoming more and more popular. However, the magnets used in high-performance permanent magnet synchronous motors use rare earth materials as excitations, and their structural shapes are mainly composed of three flat plates. The magnetic steel is arranged in a "V" shape. The shortcomings of the "V"-shaped la...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K21/02H02K1/27
Inventor 吕玉科李刚
Owner SHANDONG CHENGRUI NEW ENERGY TECH
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