Unlock instant, AI-driven research and patent intelligence for your innovation.

Radial parallel type double-stator multi-phase permanent magnet fault-tolerant motor

A permanent magnet fault-tolerant, double-stator technology, applied in electrical components, electromechanical devices, magnetic circuit static parts, etc., can solve the problems of normal operation performance and fault-tolerant capacity constraints, increase the range of weak magnetic speed expansion, and improve the internal space. Utilization rate, the effect of reducing the permanent magnetic flux

Active Publication Date: 2019-05-17
HARBIN INST OF TECH
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of mutual restriction between normal operation performance and fault tolerance ability in traditional multiphase permanent magnet fault-tolerant motors, and to provide a radially parallel double-stator multiphase permanent magnet fault-tolerant motor with excellent operation performance and fault tolerance

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Radial parallel type double-stator multi-phase permanent magnet fault-tolerant motor
  • Radial parallel type double-stator multi-phase permanent magnet fault-tolerant motor
  • Radial parallel type double-stator multi-phase permanent magnet fault-tolerant motor

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0028] Specific implementation mode one: the following combination Figure 1 to Figure 3 Describe this embodiment. This embodiment includes a rotating shaft 1, a first bearing 2, a left end cover 3, a first stator 4, a casing 5, a rotor 6, a second stator 7, a right end cover 8, and a second bearing 9.

[0029] The left and right ends of the casing 5 are respectively connected to the left end cover 3 and the right end cover 8, the first stator 4 is fixed on the left end cover 3, the second stator 7 is fixed on the right end cover 8, the rotor 6 is fixed on the rotating shaft 1, and the rotating shaft 1 The two ends pass through the left end cover 3 and the right end cover 8 respectively, and are movably connected with the two end covers through the first bearing 2 and the second bearing 9 respectively, and there is an axial air gap L1 between the first stator 4 and the rotor 6 , there is an axial air gap L2 between the second stator 7 and the rotor 6;

[0030]The first stator...

specific Embodiment approach 2

[0049]Embodiment 2: The difference between this embodiment and Embodiment 1 is that in this embodiment, a short-circuit fault occurs in one phase winding in the first stator 4, and a multi-phase full-bridge inverter is used to control the m-phase The current in the remaining m-1 phase normal winding in the stator winding 4-1 controls the magnetic state of the first permanent magnet 6-1 and the third permanent magnet 6-8 to change the resultant magnetic field in the air gap L1 size, thereby suppressing the short-circuit current in the faulty phase winding. The first permanent magnet 6-1 and the third permanent magnet 6-8 are the permanent magnets near the fault stator (the first stator 4) in the two adjustable magnetic permanent magnet units, only need to control the first stator 4 separately here current.

[0050] In this embodiment, if the second stator 7 is not faulty, its stator current will not be changed, the control of the second stator 7 will not be changed, and the re...

Embodiment

[0052] Taking a five-phase motor as an example, in the normal operating state, the direct axis current i d During =0 control, the stator windings A, B, C, D, E of the first stator 4 communicate with the amplitude as 1 m , the angular frequency is ω, and the initial phase angle is The five-phase symmetrical sinusoidal current i A , i B , i C , i D , i E ,Right now

[0053]

[0054]

[0055]

[0056]

[0057]

[0058] Assuming that a short-circuit fault occurs in the A-phase winding, the remaining four-phase normal windings are controlled to pass the following current:

[0059]

[0060]

[0061]

[0062]

[0063] Among them, the intermediate variable

[0064]

[0065] In the formula: R 0 is the short-circuit phase winding resistance; L 0 is the inductance of the short-circuit phase winding; N is the number of turns of the motor winding; k dp is the motor winding factor; Φ pm-D is the permanent magnetic flux coupled with the short-circu...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A radial parallel type double-stator multi-phase permanent magnet fault-tolerant motor belongs to the field of permanent magnet fault-tolerant motors. The invention solves the problem that the normalrunning performance and the fault-tolerant capability of the conventional multi-phase permanent magnet fault-tolerant motor are mutually restricted. In the radial parallel type double-stator multi-phase permanent magnet fault-tolerant motor, axial air gaps L1, L2 are provided between a stator and a rotor; the rotor comprises two adjustable magnetic permanent magnet units, a non-adjustable magneticpermanent magnet unit and a rotor skeleton, the left and right end surfaces of the adjustable magnetic permanent magnet units are staggered with p permanent magnet poles and p ferromagnetic poles ineach circumferential direction, and the permanent magnet poles of the two end surfaces are circumferentially staggered by 180 / p degrees; the symmetry lines of the permanent magnet poles of the outer adjustable magnetic permanent magnet unit and the ferromagnetic poles of the inner adjustable magnetic permanent magnet unit of the same end surface are coincident. The operating points of the permanent magnets of the two adjustable magnetic permanent magnet units are changed by adjusting the currents in the two stator windings to change the magnitude or direction of the magnetic flux, thereby realizing the two adjustable magnetic permanent magnet units superimposing the permanent magnet magnetic fields in the air gaps L1, L2 of the non-adjustable magnetic unit in a forward or reverse direction.

Description

technical field [0001] The invention belongs to the field of permanent magnet fault-tolerant motors. Background technique [0002] Permanent magnet motors are widely used in many fields such as electric vehicles and wind power generation due to their advantages of high efficiency and high power density. Compared with the traditional three-phase permanent magnet synchronous motor, the multi-phase permanent magnet fault-tolerant motor has good fault-tolerant operation ability because of its redundant phase number. Different from the traditional permanent magnet motor, when designing a multi-phase permanent magnet fault-tolerant motor, it is necessary to ensure that the electrical, magnetic, thermal and physical isolation conditions are met between the different phase windings. Only in this way can the faulty winding be separated when a fault occurs Effective isolation from other normal phase windings. At the same time, the current of other normal phase windings is controlled...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H02K16/04H02K1/27H02K1/16
Inventor 隋义尹佐生郑萍乔光远刘法亮
Owner HARBIN INST OF TECH