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Permanent magnet type rotating electrical machine

A rotating electrical machine, permanent magnet technology, applied in synchronous motors with stationary armatures and rotating magnets, magnetic circuit rotating parts, magnetic circuit shape/style/structure, etc., can solve current density thermal constraints, heat changes major issues

Active Publication Date: 2006-06-07
HITACHI ASTEMO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the current is increased, the heat generation will increase accordingly, and thermal constraints will be imposed on the current density.

Method used

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Embodiment Construction

[0076] Next, embodiments of the present invention will be described with reference to the drawings.

[0077] First, according to Figure 4 The structure of a vehicle using the motor generator of this embodiment will be described. In this embodiment, a hybrid electric vehicle with two different power sources is taken as an example for illustration.

[0078] The hybrid electric vehicle of this embodiment is a four-wheel drive type, and is configured such that the front wheels FLW, FRW are driven by the engine ENG as an internal combustion engine and the motor generator MG1, and the rear wheels RLW, RRW are driven by the motor generator MG2. Although the present embodiment describes the case where the front wheels FLW, FRW are driven by the engine ENG and the motor generator MG1, and the rear wheels RLW, RRW are driven by the motor generator MG2, the front wheels FLW, FRW may be driven by the motor generator MG1. ; The rear wheels RLW and RRW are driven by the engine ENG and th...

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Abstract

The present invention provides a permanent magnet rotating electrical machine capable of achieving high output. In order to solve this problem, a non-magnetic part is provided at both ends of a pole, and the angle of the minimum magnetic circuit part and the angle of the magnet generated by the non-magnetic part are utilized. The width of these two parameters adjusts the waveform of the induced voltage and the voltage of the motor. Assuming that the pitch in the circumferential direction of the tooth core with respect to the central axis of the rotor is τs (degrees), the circumferential width between the minimum radial width portions of the pair of magnetic circuit parts with respect to the central axis of the rotor is When the opening angle is set to θ (degree), θ(n+Y)×τs (n is an integer above 0), the winding method of the stator winding is distributed winding, let Y=0.5, the winding method of the above stator winding is When concentrated winding, let Y=0.9~1.2. In addition, by dividing the magnet forming one pole into two parts and providing a bridge part therebetween, it is possible to provide a permanent magnet type rotating electrical machine suitable for high-speed rotation.

Description

technical field [0001] The present invention relates to permanent magnet rotating electric machines. Background technique [0002] It is generally required that a permanent magnet rotating electrical machine, especially a permanent magnet rotating electrical machine used to drive a vehicle, include an inverter (invert) device as its control circuit, and be smaller in size and higher in output. In particular, a permanent magnet rotating electrical machine capable of outputting high torque in a low-speed rotation range and capable of high output in a high-speed rotation range is desired. Therefore, at present, embedded permanent magnet rotating electrical machines with auxiliary salient poles are widely used as permanent magnet rotating electrical machines, which can generate weak excitation during high-speed rotation and can effectively use reluctance torque. For example, JP-A-10-126985 discloses the structure of an embedded permanent magnet rotating electrical machine. [...

Claims

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Application Information

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IPC IPC(8): H02K21/14H02K1/14H02K1/27H02K3/18
Inventor 日野德昭松延丰田岛文男安原隆
Owner HITACHI ASTEMO LTD
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