CN1238942C

CN1238942C - Permanent magnetic motor rotor capable of automatically regulating magnetism

Info

Publication number: CN1238942C
Application number: CN 03132457
Authority: CN
Inventors: 寇宝泉; 程树康; 李立毅
Original assignee: Harbin Institute of Technology
Current assignee: Harbin Institute of Technology
Priority date: 2003-06-24
Filing date: 2003-06-24
Publication date: 2006-01-25
Anticipated expiration: 2023-06-24
Also published as: CN1461090A

Abstract

The present invention discloses a permanent magnet motor rotor capable of automatically regulating magnetism, which comprises a rotor core (1), permanent magnets (3) with main poles, and a weak magnetism unit (4), wherein the weak magnetism unit (4) is composed of magnetism guiding blocks (4-1) capable of guiding magnetism, a moving square (4-2) of a permanent magnet, a fixing square (4-3) of the permanent magnet, and slide ways (4-4) which do not guide magnetism. Residual slots (4-5) arranged along a radial direction are totally arranged among the permanent magnets (3) with main poles, and both sides of each residual slot (4-5), which are adjacent to the shaft center end of the rotor core (1), are respectively provided with a slideway slot (4-6). The slide ways are arranged in the slideway slots. The magnetism guiding blocks, the moving square and the fixing square are arranged in the residual slots. Polarities of the opposite surfaces between the moving square and the fixing square are the same, the moving square which can slide along the residual slots is fixed with the magnetism guiding blocks together, the magnetism guiding blocks are covered in the slide ways, the fixing square is fixed at the column surface ends of the residual slots, and the column surface ends are adjacent to the rotor core. The disadvantages of low torque at low speed and lowering system efficiency at high speed of the prior art are overcome by the present invention which has the advantages of simple structure, reliable work, and easy popularization and implementation.

Description

The permanent magnet machine rotor of energy automatic magnetic-regulation

Technical field:

The present invention relates to a kind of permanent magnet machine rotor of energy automatic magnetic-regulation.

Background technology:

Existing magnet steel embedded structure permanent-magnetic synchronous motor rotor is that main pole permanent magnet 2 is directly embedded in the rotor core groove, and its structure as shown in Figure 1.The rotor mechanical intensity of this structure is good, is suitable for high speed situation.But also there are some leakage fluxs in the rotor of this structure at magnetic bridge 5 places, so torque is low during low cruise.And also need weak-magnetic speed-regulating during high-speed cruising, so descend in the high-speed region system effectiveness.

Summary of the invention:

For the rotor that overcomes prior art exists the defective that when low cruise torque is low and system effectiveness is descended during at high-speed cruising, provide a kind of and motor torque when low cruise is not reduced and system effectiveness does not descend during high-speed cruising permanent magnet machine rotor.The present invention is achieved by following scheme: a kind of permanent magnet machine rotor of energy automatic magnetic-regulation, it comprises rotor core 1 and main pole permanent magnet 3, permanent magnet machine rotor also comprises weak magnetic cell 4, rotor core 1 is repeatedly made by silicon steel sheet, have several in the columniform rotor core 1 and be parallel to axial line, end face is the rotor core groove 1-1 of rectangle, 1-1 is along the circumferential direction uniform on the end face of rotor core 1 for this several rotor core groove, main pole permanent magnet 3 is embedded among the rotor core groove 1-1, main pole permanent magnet 3 is along the parallel magnetic field that is filled with of the radial direction of rotor core 1, weak magnetic cell 4 is by the magnetic inductive block 4-1 of energy magnetic conduction, the mobile side 4-2 of permanent magnet, the fixing side 4-3 of permanent magnet and non-magnetic slide rail 4-4 form, between per two adjacent main pole permanent magnets 3, all have the magnet isolation tank 4-5 that is disposed radially, magnet isolation tank 4-5 respectively has a sliding-rail groove 4-6 near the both sides of rotor core 1 axis client, slide rail 4-4 is arranged among the sliding-rail groove 4-6, magnetic inductive block 4-1, mobile square 4-2 and fixing square 4-3 are arranged among the magnet isolation tank 4-5 by order from inside to outside, facing surfaces polarity is identical between mobile square 4-2 and the fixing square 4-3, can be fixed together along mobile side 4-2 and the magnetic inductive block 4-1 that magnet isolation tank 4-5 slides, magnetic inductive block 4-1 covers among the slide rail 4-4, and fixing square 4-3 is fixed on the periphery end of the close rotor core 1 of magnet isolation tank 4-5.Because fixing square 4-3 is a permanent magnet, and it is close to magnetic bridge 1-2, and its magnetic flux also will pass through magnetic bridge 1-2, makes the magnetic bridge 1-2 easy magnetic saturation that becomes, thereby the leakage flux of main pole permanent magnet 3 is reduced, and the torque of motor is improved.When rotor high-speed moves, magnetic inductive block 4-1 and mobile square 4-2 overcome magnetic field repulsive force and outwards move under action of centrifugal force, magnetic inductive block 4-1 exposes outside slide rail 4-4, contact with the rotor core of rotor core groove 1-1 both sides, thereby magnetic resistance is descended, leakage flux is increased, and therefore main flux weakens, and finishes automatic weak-magnetic.The defective that system effectiveness descended during low, the high speed of torque when the present invention had overcome prior art low speed, have simple in structure, the reliable operation and the advantage of promotion and implementation easily, can be used for permanent magnet synchronous motor or brushless DC motor, also can be used for magneto alternator.

Description of drawings:

Fig. 1 is the structural representation of the rotor of prior art, Fig. 2 is the structural representation of embodiment of the present invention one, Fig. 3 is the structural representation of execution mode one rotor iron core 1, and Fig. 4 is the structural representation of execution mode two, and Fig. 5 is the structural representation of execution mode two rotor iron cores 1.

Embodiment:

Embodiment one: specify present embodiment below in conjunction with Fig. 2 and Fig. 3.It is by rotor core 1 and main pole permanent magnet 3, weak magnetic cell 4 is formed, rotor core 1 is repeatedly made by silicon steel sheet, have several in the columniform rotor core 1 and be parallel to axial line, end face is the rotor core groove 1-1 of rectangle, 1-1 is along the circumferential direction uniform on the end face of rotor core 1 for this several rotor core groove, main pole permanent magnet 3 is embedded among the rotor core groove 1-1, main pole permanent magnet 3 is along the parallel magnetic field that is filled with of the radial direction of rotor core 1, weak magnetic cell 4 is by the magnetic inductive block 4-1 of energy magnetic conduction, the mobile side 4-2 of permanent magnet, the fixing side 4-3 of permanent magnet and non-magnetic slide rail 4-4 form, between per two adjacent main pole permanent magnets 3, all have the magnet isolation tank 4-5 that is disposed radially, magnet isolation tank 4-5 respectively has a sliding-rail groove 4-6 near the both sides of rotor core 1 axis client, slide rail 4-4 is arranged among the sliding-rail groove 4-6, magnetic inductive block 4-1, mobile square 4-2 and fixing square 4-3 are arranged among the magnet isolation tank 4-5 by order from inside to outside, facing surfaces polarity is identical between mobile square 4-2 and the fixing square 4-3, can be fixed together along mobile side 4-2 and the magnetic inductive block 4-1 that magnet isolation tank 4-5 slides, magnetic inductive block 4-1 covers among the slide rail 4-4, and fixing square 4-3 is fixed on the periphery end of the close rotor core 1 of magnet isolation tank 4-5.

Embodiment two: specify present embodiment below in conjunction with Fig. 4 and Fig. 5.The difference of present embodiment and execution mode one is, have two magnet isolation tank 4-7 between every two adjacent main pole permanent magnets 3, the end of nearly rotor core 1 axial line of magnet isolation tank 4-7 is connected with rotor core groove 1-1, the yoke 4-8 place of the end of nearly rotor core 1 axial line of magnet isolation tank 4-7 has a sliding-rail groove 4-9, stud with the slide rail 4-4 identical among the sliding-rail groove 4-9, be provided with the magnetic inductive block 4-1 identical with connected mode among the magnet isolation tank 4-7, move square 4-2, fixing square 4-3 with the composition of execution mode one with execution mode one.The present embodiment leakage field still less, torque is bigger during low cruise.

Embodiment three: the difference of present embodiment and execution mode one or execution mode two is that magnetic inductive block 4-1 and mobile square 4-2 bond together.

Claims

1, a kind of permanent magnet machine rotor of energy automatic magnetic-regulation, it comprises rotor core (1) and main pole permanent magnet (3), rotor core (1) is repeatedly made by silicon steel sheet, have several in the columniform rotor core (1) and be parallel to axial line, end face is the rotor core groove (1-1) of rectangle, these several rotor core grooves (1-1) are along the circumferential direction uniform on the end face of rotor core (1), main pole permanent magnet (3) is embedded in the rotor core groove (1-1), main pole permanent magnet (3) is along the parallel magnetic field that is filled with of the radial direction of rotor core (1), it is characterized in that permanent magnet machine rotor also comprises weak magnetic cell (4), weak magnetic cell (4) is by the magnetic inductive block (4-1) of energy magnetic conduction, the mobile side (4-2) of permanent magnet, the fixedly side (4-3) of permanent magnet and non-magnetic slide rail (4-4) are formed, between per two adjacent main pole permanent magnets (3), all have the magnet isolation tank (4-5) that is disposed radially, magnet isolation tank (4-5) respectively has a sliding-rail groove (4-6) near the both sides of rotor core (1) axis client, slide rail (4-4) is arranged in the sliding-rail groove (4-6), magnetic inductive block (4-1), mobile side (4-2) and fixing side (4-3) are arranged in the magnet isolation tank (4-5) by order from inside to outside, facing surfaces polarity is identical between mobile side (4-2) and the fixing side (4-3), can be fixed together along mobile side (4-2) and the magnetic inductive block (4-1) that magnet isolation tank (4-5) slides, magnetic inductive block (4-1) covers in the slide rail (4-4), and fixing side (4-3) is fixed on the periphery end of the close rotor core (1) of magnet isolation tank (4-5).

2, the permanent magnet machine rotor of energy automatic magnetic-regulation according to claim 1, it is characterized in that having two magnet isolation tanks (4-7) between every adjacent two main pole permanent magnets (3), the end of nearly rotor core (1) axial line of magnet isolation tank (4-7) is connected with rotor core groove (1-1), the yoke (4-8) of the end of nearly rotor core (1) axial line of magnet isolation tank (4-7) locates to have a sliding-rail groove (4-9), stud with slide rail (4-4) in the sliding-rail groove (4-9), be provided with magnetic inductive block (4-1) in the magnet isolation tank (4-7), move side (4-2), fix side (4-3).

3, the permanent magnet machine rotor of energy automatic magnetic-regulation according to claim 1 and 2 is characterized in that magnetic inductive block (4-1) and moves side (4-2) bonding together.