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Permanent magnetism type electric rotating machine

A rotating electrical machine, permanent magnet technology, applied to synchronous motors with stationary armatures and rotating magnets, magnetic circuit rotating parts, magnetic circuit shape/style/structure, etc. Adoption, use of power and increase in loss of control device, etc., to achieve the effect of suppressing the increase of high-harmonic components in space and suppressing torque ripple

Active Publication Date: 2012-09-05
HITACHI LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, the amount of power used and the loss of the control device increase, and it is necessary to install a cooling and waste heat mechanism as shown in Patent Document 1.
Therefore, the overall complexity and cost of the system are increased, and these cannot be actively adopted due to deviation from the current energy-saving requirements

Method used

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  • Permanent magnetism type electric rotating machine
  • Permanent magnetism type electric rotating machine
  • Permanent magnetism type electric rotating machine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] image 3 It is a schematic diagram showing a radial cross section of one pole of the rotor of the permanent magnet rotating electrical machine according to Embodiment 1 of the present invention. in addition, Figure 4 It is a schematic diagram showing a quadrupole armature winding arrangement of the permanent magnet rotating electric machine according to the first embodiment. Figure 5 is a schematic diagram showing a radial cross section of the permanent magnet rotating electrical machine according to Embodiment 1, Figure 6 It is a schematic diagram showing a radial cross section of one pole of a rotor of a conventional permanent magnet rotating electrical machine.

[0055] exist image 3 and Figure 5Among them, inside the rotor core 9 provided on the shaft 12, the rotor 8 is constituted by arranging the straight magnet insertion hole 10 and the permanent magnet 11 inserted into the magnet insertion hole 10 so that the number of magnetic poles is 16. Here, the p...

Embodiment 2

[0075] Figure 10 It is a diagram showing an armature winding arrangement diagram of a permanent magnet rotating electric machine according to Embodiment 2 of the present invention. In the following embodiments, the same symbols are assigned to the same structural elements as those in the already described drawings to avoid repeated descriptions. Embodiment 2 differs from Embodiment 1 in that the number of slots per pole and phase is 1.5. Here, as shown in Example 2, by setting the number of slots per pole and phase to 1.5, similar to the case where the number of slots per pole and phase is 0.75, since the number of slots per pole and phase can be 1 In this case, the ripple of the torque is reduced. Therefore, in terms of characteristics, the number of slots per pole and phase is preferably 1.5.

[0076] Even if constituted in this way, the same effect as in Embodiment 1 can be obtained, and the number of poles of the permanent magnet rotating electrical machine can be set t...

Embodiment 3

[0078] Figure 11 It is a schematic diagram showing a radial cross section of one pole of the rotor of the permanent magnet rotating electrical machine according to the third embodiment of the present invention. Embodiment 3 differs from Embodiment 1 in that the slits 15 a to 15 i are closed in the rotor core 9 . Even with such a configuration, the slits 15a to 15i suppress the magnetic flux of the permanent magnets 11 and the magnetic flux on the stator side from inclining toward the d-axis side at the magnetic pole portion of the rotor core 9, widen the phase difference of the respective magnetic fluxes, and suppress the magnetic fluxes. The spatial high-harmonic component of the increases, so that the same effect as that of the first embodiment can be obtained.

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Abstract

The present invention provides a high-performance permanent magnetism type electric rotating machine capable of lightening turning moment reduction caused by saturated magnetization generated in a high current and lightening the increasing of loss and heating as the increasing of the current, a magnetic pole at the outer side of a permanent magnet insertion hole on a rotor core has a plurality ofnarrow slits for restraining the permanent magnet magnetic flux and the stator magnetic flux from being gradient from the magnetic pole part of the rotor core, and the range of the narrow slits on the magnetic pole is set between 22 DEG electrical angle and 82 DEG electrical angle.

Description

technical field [0001] The present invention relates to a permanent-magnet rotating electric machine provided with a permanent magnet for excitation on a rotor, and more particularly to a multi-pole permanent-magnet rotating electric machine driven at a low speed, high torque, and driven by a large current. Background technique [0002] With the development of high residual flux density magnets, the performance of permanent magnet rotating electrical machines has been dramatically improved, and they are used in all fields. In particular, from the standpoint of recent environmental regulations, high energy efficiency is required for vehicle electric motors and air-conditioning compressors including automobiles, and the application rate of permanent magnet rotating electric machines tends to be very high. [0003] On the other hand, in the field of industrial rotating electric machines, the rate of application of the same permanent magnet rotating electric machines is also exp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K21/16H02K1/27H02P6/10
Inventor 涌井真一菊地聪酒井俊彦大原光一郎八原昌尚
Owner HITACHI LTD