Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Flux increase type built-in U type adjustable magnetic flux motor

A magnetic flux motor, U-shaped technology, applied in the direction of magnetic circuit shape/style/structure, magnetic circuit, synchronous machine, etc., can solve the problems of uncontrollable demagnetization of AlNiCo permanent magnets, etc., to ensure stability, controllability, change Air-gap flux, possibility reduction effect

Active Publication Date: 2016-10-12
黑龙江省工研院资产经营管理有限公司
View PDF8 Cites 6 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 uncontrollable demagnetization of AlNiCo permanent magnets prone to occur in high-load operation of a field-weakening adjustable flux motor, and at the same time reduce the difficulty of accurately adjusting the magnetization of AlNiCo permanent magnets online, and provide a This type uses AlNiCo permanent magnets and NdFeB permanent magnets at the same time, with built-in U-shaped magnetic poles, and the quadrature axis reactance Lq is smaller than the direct axis reactance Ld, that is, the magnetization adjustable flux motor

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
  • Flux increase type built-in U type adjustable magnetic flux motor
  • Flux increase type built-in U type adjustable magnetic flux motor
  • Flux increase type built-in U type adjustable magnetic flux motor

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0020] Specific implementation mode one: the following combination Figure 1 to Figure 3 Describe this embodiment, the magnetization type built-in U-shaped adjustable flux motor described in this embodiment includes a stator core 1, an armature winding 2, a rotor core 3 and a rotating shaft 9; the rotor core 3 is fixed on the rotating shaft 9, and is located Inside the core 1, the armature winding 2 is arranged on the stator core 1;

[0021] It also includes p U-shaped permanent magnet slots 4, p NdFeB magnetic poles 5, 2p AlNiCo magnetic poles 6 and p cross-axis magnetic barriers 8, where p is an even number, and the rotor core 3 is alternately and uniformly arranged along the motor circumference p U-shaped permanent magnet slots 4 and p cross-axis magnetic barriers 8, the U-shaped permanent magnet slots 4 and the quadrature-axis magnetic barriers 8 both penetrate the entire rotor core 3 in the axial direction, and the U-shaped permanent magnet slots 4 open toward the stator ...

Embodiment 1

[0025] combine figure 1 To illustrate this embodiment, the magnetization-increased built-in U-shaped adjustable flux motor includes a stator, a rotor, and a rotating shaft. The stator in the present invention includes a stator core 1 and an armature winding 2. The armature winding 2 is arranged in the slot of the stator iron core, and the rotating shaft 9 is made of cast steel, and the stator and shaft 9 are the same as those of conventional permanent magnet synchronous motors; the rotor includes U-shaped permanent magnet slots 4, NdFeB magnetic poles 5, AlNiCo magnetic poles 6, magnetic bridges 7 and cross-axis magnetic barriers 8 , the rotor is alternately and uniformly arranged with U-shaped permanent magnet slots 4 and quadrature-axis magnetic barriers 8 along the circumferential direction, and the U-shaped permanent magnet slots 4 and the quadrature-axis magnetic barriers 8 both run through the entire motor in the axial direction, and the openings of the U-shaped permanent...

Embodiment 2

[0027] combine figure 2 Note that the difference between this embodiment and Embodiment 1 is that the quadrature-axis magnetic barrier 8 is a long strip-shaped groove arranged radially along the motor, with smooth ends at both ends, and its interior can also be made of non-magnetically conductive epoxy resin, carbon fiber, etc. , Non-conductive material filling.

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

The invention discloses a flux increase type built-in U type adjustable magnetic flux motor, and belongs to the field of permanent magnet motors. The flux increase type built-in U type adjustable magnetic flux motor aims at solving the problem that when a flux weakening type adjustable magnetic flux motor runs at high loads, uncontrollable demagnetization of an aluminum-nickel-cobalt permanent magnet is prone to happen. The flux increase type built-in U type adjustable magnetic flux motor comprises a stator core, an armature winding, a rotor core, a rotary shaft, p U type permanent magnet grooves, p neodymium iron boron magnetic poles, 2p aluminum-nickel-cobalt magnetic poles and p quadrature axis magnetic barriers, and p is an even number; the p U type permanent magnet grooves and the p quadrature axis magnetic barriers are alternately and evenly arranged on the rotor core in the circumferential direction of the motor, the U type permanent magnet grooves and the quadrature axis magnetic barriers penetrate through the whole rotor core in the axial direction, and openings of the U type permanent magnet grooves face the stator core; each U type permanent magnet groove is formed in the mode that two U type branch rectangular grooves are communicated with one bottom rectangular groove, one neodymium iron boron magnetic pole and two aluminum-nickel-cobalt magnetic poles are arranged in each U type permanent magnet groove, the neodymium iron boron magnetic poles are arranged in the bottom rectangular grooves of the U type permanent magnet grooves, and the aluminum-nickel-cobalt magnetic poles are arranged in the U type branch rectangular grooves in the two sides of the U type permanent magnet grooves.

Description

technical field [0001] The invention belongs to the field of permanent magnet motors. Background technique [0002] In order to overcome the problems that the direct axis component of the armature current increases, the quadrature axis component decreases, the copper loss increases, and the electromagnetic torque of the motor decreases rapidly when the traditional rare earth permanent magnet motor is running at a weak field speed. The adjustable magnetic flux memory motor with coercive force AlNiCo permanent magnet came into being. When the motor is running, the air gap flux density of the permanent magnet motor is adjusted by applying the direct axis charge and demagnetization pulse current, thereby expanding the speed regulation range of the motor. . However, the quadrature-axis reactance Lq of this type of motor is often greater than the direct-axis reactance Ld during design. When the motor is running at high load, it needs a negative direct-axis current component to ge...

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
IPC IPC(8): H02K21/02H02K1/27
CPCH02K1/2706H02K21/028
Inventor 郑萍张书宽隋义王伟男王明峤田孟娇
Owner 黑龙江省工研院资产经营管理有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Eureka Blog
Learn More
PatSnap group products