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Permanent magnet rotary electric machine and permanent magnet motor drive system

一种永久磁铁、驱动系统的技术，应用在带有静止电枢和旋转磁体的同步电动机、电子换向电动机控制、电动机控制等方向，能够解决无法得到充分的输出、综合运转效率恶化、电动机损失等问题，达到材料削减、制造性提高、可靠性提高的效果

Active Publication Date: 2010-01-27
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the case of the rotating electrical machine of Patent Document 4, since it is a simple alnico magnet motor, sufficient output cannot be obtained.
In addition, there is a problem that the AlNiCo magnet is demagnetized by the load current when torque is generated, and the torque decreases due to the demagnetization by the load current.
In this case, the motor generates losses, so the overall operating efficiency deteriorates

Method used

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  • Permanent magnet rotary electric machine and permanent magnet motor drive system
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  • Permanent magnet rotary electric machine and permanent magnet motor drive system

Examples

Experimental program
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no. 1 approach

[0049] (Permanent magnet type rotating electrical machine)

[0050] use Figure 1 to Figure 6 , the permanent magnet type rotating electric machine according to the first embodiment of the present invention will be described. figure 1 The configuration of the permanent magnet type rotating electrical machine according to the present embodiment is shown, and the rotor 1 is accommodated in the stator 20 so as to face each other with the air gap 23 interposed therebetween. In addition, the stator 20 is the same as the conventional example, and Figure 20 same.

[0051] Such as figure 1 As shown, the rotor 1 in the permanent magnet type rotating electrical machine of this embodiment includes a rotor core 2, a permanent magnet 3 with a small product of the coercive force and the thickness in the magnetization direction, and a permanent magnet 4 with a large product of the coercive force and the thickness in the magnetization direction . The rotor core 2 is composed of laminat...

no. 2 approach

[0130] A permanent magnet type rotating electrical machine and a permanent magnet motor drive system according to a second embodiment of the present invention will be described. The present embodiment is characterized in that, relatively figure 1 The permanent magnet rotating electrical machine 101 shown utilizes Figure 7 In the permanent magnet motor drive system shown, the alnico permanent magnet 3 is irreversibly magnetized by a pulsed magnetic field generated by a short-term d-axis current to change the linkage flux.

[0131] In this way, in the medium-speed rotation domain and the high-speed rotation domain, the magnetic flux is always generated by the negative d-axis current, so that the magnetic flux generated by the above-mentioned negative d-axis current can be adjusted, including the magnetic flux generated by the negative d-axis current. The interlinkage flux of the magnetic flux and the magnetic flux generated by the permanent magnets 3 and 4. That is, in the m...

no. 3 approach

[0134] use Figure 13 , a permanent magnet type rotating electrical machine according to a third embodiment of the present invention will be described. The structure of the stator 20 in the permanent magnet type rotating electrical machine of the present embodiment and figure 1 Part of the first embodiment shown, Figure 20 The part of the conventional example shown is the same.

[0135] Such as Figure 13 As shown, in the rotor 1 of the present embodiment, the AlNiCo permanent magnets 3 are arranged radially in the rotor core 2 on the q-axis, and the NdFeB permanent magnets 4 are perpendicular to the d-axis so as to be in contact with each other in the circumferential direction. Arranged in the rotating core 2. The rotor 1 is configured such that an iron shaft 9 is fitted into an inner peripheral side of a rotor core 2 . The shaft 9 has a four-sided shape, and an air layer 8 is formed between the rotor core 2 and the shaft 9 . In addition, the shaft 9 may be made of a n...

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Abstract

A permanent magnet rotary electric machine which can perform high output variable speed operation over a wide range from low speed to high speed while enhancing efficiency and reliability over a wide operation range. The permanent magnet rotary electric machine is characterized in that one magnetic pole (7) is formed by burying two kinds of permanent magnets (3, 4) of different profile or magnetic characteristics in a rotor core (2), permanent magnets arranged in the magnetic pole are composed of a permanent magnet (3) having a small product of coercive force and thickness in the magnetization direction, and a permanent magnet (4) having a large product of coercive force and thickness in the magnetization direction, total amount of interlinkage flux is varied by magnetizing the permanent magnet having a small product of coercive force and thickness in the magnetization direction irreversibly with a magnetic field formed by the current of the armature winding (21) in a short time, and a positive d-axis current can be fed at the time of larger torque.

Description

technical field [0001] The present invention relates to a permanent magnet type rotating electrical machine and a permanent magnet motor drive system. Background technique [0002] In general, permanent magnet type rotating electrical machines are roughly classified into two types. There are surface magnet type permanent magnet rotating electrical machines with permanent magnets attached to the outer circumference of the rotor core, and embedded permanent magnet type rotating electrical machines with permanent magnets embedded in the rotor core. As a motor for variable speed drive, an embedded permanent magnet type rotating electrical machine is used. [0003] use Figure 20 , the structure of a conventional embedded permanent magnet rotating electrical machine will be described. The same number of rectangular cavities as the number of poles are similarly provided on the outer peripheral portion of the rotating core 2 of the rotor 1 . Figure 20 It is a rotor 1 with four p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P27/04H02K21/14H02K1/27H02P21/00H02P21/02H02P21/13H02P21/22H02P23/02H02P23/16H02P23/28H02P27/08
CPCH02K1/2766H02P2207/05H02P21/06H02P23/0086H02P21/0089Y10T29/49822Y10T29/49009
Inventor 堺和人结城和明
Owner KK TOSHIBA
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