Controllable flux permament magnetic synchronous motor of built-in mixed rotor magnetic path structure

A permanent magnet synchronous motor, hybrid technology, applied in the shape/style/structure of the magnetic circuit, rotating parts of the magnetic circuit, etc., can solve the problems of damage, drop, loss of field weakening control ability of the inverter power device, etc., to achieve the effect significant effect

Inactive Publication Date: 2008-10-15
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In field-weakening speed regulation, if the total stator current is limited, then the quadrature axis current vector i q The resulting torque that can be utilized will decrease; at the same time, due to the direct axis current vector i d To exist all the time, additional copper loss will be generated in the stator three-phase winding
As for the frequency converter, if the inverter fails and the magnetic field weakening control capability is lost, the permanent magnetic field of the rotor rotating at high speed will induce excessive voltage in the motor winding, which may cause damage to the power device of the frequency converter

Method used

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  • Controllable flux permament magnetic synchronous motor of built-in mixed rotor magnetic path structure
  • Controllable flux permament magnetic synchronous motor of built-in mixed rotor magnetic path structure
  • Controllable flux permament magnetic synchronous motor of built-in mixed rotor magnetic path structure

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Embodiment Construction

[0010] Specific embodiments of the present invention are described below in conjunction with accompanying drawings:

[0011] figure 2 and image 3 The difference between the two lies in that the shapes of the radially placed NdFeB permanent magnets 8 and their magnetization directions are different, and they are identical in other respects. The specific implementation is also exactly the same. The whole motor is implemented as follows.

[0012] It has been mentioned above that the present invention has a built-in hybrid rotor magnetic circuit structure controllable flux permanent magnet synchronous motor - a memory motor. Except for the motor rotor, other parts of the motor are basically the same as the traditional permanent magnet synchronous motor. That is to say, the end cover 3 of the motor, the frame 5, the air-conditioning fan 10, the windshield 11, the stator core 6, the winding, insulation, embedding, dipping, drying, and pressing into the frame 5 of the three-phas...

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Abstract

This invention provides a controlled flux magnet synchronous motor of integral hybrid rotor magnetic-circuit structure including a motor splindle, a stator winding, a rotor iron core, a AlNiCo magnet, NdFeB magnet and a rotor iron core, in the rotor iron core, the magnets are place in W shape, AlNiCo is set tangentially and the NdFeB is set in radial position which can be a parallelogram or a rectangle considering the limit of the rotor space. The advantage is that an ampltude controlled d-axis vector is applied to alter the magnetization intensity of the rotor magnet and memerizes the altered flux density.

Description

technical field [0001] The invention belongs to motor and electric drive control, in particular to a permanent magnet synchronous motor with a built-in hybrid rotor structure magnetic circuit and magnetic flux controllable. Background technique [0002] Generally, in the design of the rotor magnetic circuit and the size determination of the permanent magnets of traditional permanent magnet synchronous motors, it should be considered that the demagnetization of the permanent magnets should be prevented even under the most extreme working conditions. This means that at the maximum operating temperature, the thickness of the permanent magnets in conventional permanent magnet motors is large enough that the demagnetizing magnetomotive force generated by the armature reaction is lower than the coercive force of the permanent magnets. This is because in traditional permanent magnet motors, especially rare earth permanent magnet motors, once the permanent magnets are demagnetized, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K1/27
Inventor 陈益广沈勇环王晓远
Owner TIANJIN UNIV
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