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Permanent magnet type rotating motor

A technology of permanent magnets and rotating electrical machines, applied to synchronous motors with stationary armatures and rotating magnets, magnetic circuit rotating parts, magnetic circuit shape/style/structure, etc. The effect of improving efficiency and improving reliability

Active Publication Date: 2011-08-31
KK TOSHIBA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Because in this state, the motor only produces losses, so the overall operating efficiency deteriorates

Method used

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  • Permanent magnet type rotating motor
  • Permanent magnet type rotating motor
  • Permanent magnet type rotating motor

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Embodiment Construction

[0034] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[0035] (first embodiment) such as figure 1 , figure 2 As shown, the rotor 1 of the permanent magnet type rotating electrical machine 20 according to the first embodiment of the present invention is formed by embedding eight low-coercivity permanent magnets 3 and eight high-coercivity permanent magnets 3 and eight high-coercivity Magnetic force permanent magnet 4 and constitute. In the embedded portion of the low-coercivity permanent magnet 3 of the rotor core 2 , first cavities 5 are formed at both ends of the permanent magnet 3 . In addition, in the embedded part of the high-coercivity permanent magnet 4 of the rotor core 2 , second cavities 6 are formed at both ends of the permanent magnet 4 . 7 indicates the magnetic pole portion of the rotor core 2 . The rotor core 2 is formed by laminating silicon steel plates. The low-coercivity permanent magnet 3 ...

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Abstract

The invention aims at providing a permanent magnet type rotating motor which can be operated with high output in a variable speed way in a large range from low speed to high speed, so as to improve the efficiency and the reliability of the permanent magnet type rotating motor. The permanent magnet type rotating motor is provided with a stator and a rotor, wherein the stator is provided with a stator winding, the rotor is provided with a permanent magnet with low coercive force with irreversible changed magnetic flux density and a permanent magnet with high coercive force which is more than two times than the low coercive force through a magnetic field generated by current of the stator winding. In the permanent magnet type rotating motor, in order to reduce total interlinking magnetic flux generated by the permanent magnet with low coercive force and the permanent magnet with high coercive force in a high-speed rotating area with more than the maximum power voltage, the permanent magnet with low coercive force is magnetized through the magnetic field formed by the current, so as to adjust the total interlinking magnetic flux.

Description

[0001] This application is a divisional application of an invention patent application named "Permanent Magnet Rotating Electric Machine", with an international filing date of August 23, 2006, an international application number of PCT / JP2006 / 316510, and a national application number of 200680055648.2. technical field [0002] The present invention relates to a permanent magnet type rotating electric machine. Background technique [0003] In general, permanent magnet motors are roughly classified into two types. There are surface magnet type permanent magnet motors in which permanent magnets are pasted on the outer circumference of the rotor core, and embedded permanent magnet motors in which permanent magnets are embedded in the rotor core. An embedded permanent magnet motor is suitable as a motor for variable speed drive. [0004] use Figure 19 , to describe the structure of the rotor of the embedded permanent magnet motor. exist Figure 19 Among them, 11 represents the...

Claims

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Application Information

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IPC IPC(8): H02K21/16H02K1/27
Inventor 堺和人新政宪
Owner KK TOSHIBA
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