CN101425708A

CN101425708A - Permanent-magnetic electric motor

Info

Publication number: CN101425708A
Application number: CNA2007101652248A
Authority: CN
Inventors: 李孝诗; 余文和
Original assignee: Rechi Precision Co Ltd
Current assignee: Rechi Precision Co Ltd
Priority date: 2007-10-31
Filing date: 2007-10-31
Publication date: 2009-05-06

Abstract

The invention relates to a permanent magnet motor. The permanent magnet motor comprises a stator, a rotor and a rotating axle, wherein the rotor forms a plurality of rotor magnetic poles, each rotor magnetic pole is provided with an arc-shaped surface and first and second inclined sections extending from both sides of the arc-shaped surface, the second inclined sections of the adjacent rotor magnetic poles are connected via a tangent section to form a sunken space, a plurality of magnets are arranged in all the rotor magnetic poles, both end parts of each magnet are arranged adjacent to two second inclined sections, and the center part of each magnet is sunken toward the center of the rotor, so as to fully improve the efficiency of the motor.

Description

Permanent magnet motor

Technical field

The relevant a kind of permanent magnet motor of the present invention is providing a kind of flux amount that reduces to change and reduced the high order harmonic component composition that electric power wave shape is contained, with the permanent magnet motor of fully raising the efficiency.

Background technology

Now in the industrial circle, often need provide power to do the motion of rotation or other form with driving device, this often with motor as power resources; Because motor can be converted into mechanical energy with electric energy or magnetic energy,, become a kind of indispensable equipment so be widely used on the devices such as various industry, electrical equipment, transportation system.

Motor is broadly divided into direct current, exchange, have brush or pattern such as brushless, generally speaking, the structure of motor is made up of a rotor and a stator, by the magnetic flux distribution between rotor and stator, impel rotor to be rotated motion, after this conduction that rotatablely moves come out, just can provide required mechanical energy.Wherein, utilize magnet itself to have the characteristic of magnetic, being used provides magnetic flux, is permanent-magnet motor, because permanent-magnet motor can form bigger torque, usefulness and accuracy in limited volume also higher, so attracted attention on market.

See also the structural representation that Figure 1 shows that known permanent-magnet motor 10, it comprises a rotor 11 and a stator 12, this rotor 11 is provided with a plurality of magnet 111, stator 12 then is a circulus, and on inner edge, be equipped with a plurality of magnetic pole of the stator 121, then can be arranged with coil on the magnetic pole of the stator 121, after treating that rotor 11 and stator 12 are sheathed mutually, just form an air gap between rotor 11 and the stator 12, when coil alives, act on each other by the magnet 111 of the made magnetic pole of the stator 121 of magnetic conductivity material, promptly produce one and rotatablely move by rotor 11; This rotor 11 can have an axle 13 in addition, so that when rotor 11 is rotated motion, mechanical energy is conducted out, is made for further use.

Wherein, in the rotor 11 shown in Figure 1, it has plural rotor magnetic pole 112, be example as shown in the figure with the quadrupole motor, so have four rotor magnetic poles 112, and each rotor magnetic pole 112 tool camber line surface 113, on this camber line surface 113 to the distance of rotor 11 center O 1, by central point 113a decrescence from dual-

side

113b, 113c, so then have a groove 114 in each 113 on camber line surface, make this camber line surface 113 and the gap of magnetic pole of the stator 121 shorten, and the gap of groove 114 and magnetic pole of the stator 121 increase.Therefore, near relative camber line surface 113 central point 113a magnetic pole of the stator 121a flux can be concentrated (flux A), magnetic is easy to full closing, and can reduce by the flux (flux B) of magnetic pole of the

stator

121b, 121c, and the electric power that the stator winding place induces can reduce.Under this situation, in order to increase the electric power that rises that induces at the stator winding place, must increase the number of turns of stator winding, when still increasing the number of turns of stator winding, can increase with the copper loss due to the stator winding, therefore can't fully improve the efficient of motor.

Summary of the invention

Main purpose of the present invention is promptly providing a kind of flux amount that reduces to change and reduced the high order harmonic component composition that electric power wave shape is contained, with the permanent magnet motor of fully raising the efficiency.

Permanent magnet motor of the present invention is provided with: stator, rotor and rotating shaft, this rotor also is formed with plural rotor magnetic pole, and each rotor magnetic pole is provided with first and second tilting section of an arc surface and the both sides extension of arc surface, then connect and the formation dented space between second tilting section of adjacent rotor magnetic pole with a tangent section, plural number magnet is located in each rotor magnetic pole, and the both ends of each magnet then are located near 2 second tilting section places, and each magnet central part is towards rotor center place indent.

Wherein, the formed angle in this arc surface is θ, and when the quantity that makes rotor magnetic pole was P (for even number), it satisfied the condition of (120/P) degree≤θ≤(200/P) spend.

Description of drawings

Fig. 1 is the structural representation of general permanent-magnet motor rotor and stator;

Fig. 2 is the rotor of permanent magnet motor among the present invention and the structural representation of stator;

Fig. 3 is the structural representation of rotor of the present invention;

Fig. 4 is the part structure for amplifying schematic diagram of rotor of the present invention and stator;

Fig. 5 A～E is the multi-form structural representation of each magnet among the present invention.

[figure number explanation]

Permanent-magnet motor 10 rotors 11

Magnet 111 rotor magnetic poles 112

Camber line surface 113 central point 113a

Side

113b, 113c groove 114

Magnetic pole of the stator 121,121a, 121b, 121c stator 12

Axle 13 permanent magnet motors 20

Stator 21 circular body portion 211

Magnetic pole of the stator 212 accommodation spaces 213

Rotor 22 rotor magnetic poles 221

Magnet 222

end

222a, 222b

Flat part

222c arc portion 222d

Arc surface 223 first tilting sections 224

Second tilting section, 225 tangent sections 226

Dented space 227 air vent holes 228

Rivet hole 229 rotating shafts 23

Embodiment

The rotor that the present invention is primarily aimed in the general permanent magnet motor is improved, and to shown in Figure 4, this permanent magnet motor 20 includes: stator 21, rotor 22 and rotating shaft 23 as Fig. 2; Wherein:

This stator 21 has a circular body portion 211 and plural magnetic pole of the stator 212, and each magnetic pole of the stator 212 is convexly set in this main part 211 inside, and in each magnetic pole of the stator 212 and be formed with an accommodation space 213.

The slightly conglobate lamellar body of this rotor 22 is arranged in this

accommodation space

213, and and 212 of each magnetic pole of the stator have air gap, this rotor 22 also is formed with plural rotor magnetic pole 221, and in each rotor magnetic pole 221 and be provided with magnet 222.

The quantity of plural number rotor magnetic pole 221 is the even number setting, and this enforcement is example with the quadrupole motor, so have four rotor magnetic poles 221, each rotor magnetic pole 221 is provided with outward extending in regular turn first and second tilting section 224,225 in arc surface 223 and arc 223 both sides, surface, and 225 of adjacent second tilting sections then connect and formation dented space 227 with a tangent section 226.

Plural number magnet 222 is located in each rotor magnetic pole 221, and both ends 222a, the 222b of each magnet 222 then be located near 2 second tilting sections, 225 places, and each magnet 222 central part slightly is V-shape towards rotor 22 center O2 indents; Certainly, each magnet also can be multi-form, and shown in Fig. 5 A, each magnet 222 central part is camber towards rotor 22 center O2 indents; Also more than one magnet 222 can be provided with in each rotor magnetic pole 221, shown in Fig. 5 B; And shown in Fig. 5 C, each magnet 222 central part is towards rotor 22 center O2 indents, and these magnet 222 central parts are flat part 222c, the both ends 222a of both sides, the form that 222b then expands outwardly; Also can be shown in Fig. 5 D, each magnet 222 central part is towards rotor 22 center O2 indents, and these magnet 222 central parts are arc portion 222d, and this arc portion 222d is towards rotor 22 center O2 evaginations, the both ends 222a of both sides, the form that 222b then expands outwardly; Moreover each magnet 222 also can be formed directly in flat, shown in Fig. 5 E.

The center O2 of rotor 22 is located in one rotating shaft 23, connects as one with rotor 22.

Wherein, the slope of this first tilting section 224 is less than the slope of second tilting section 225, and second tilting section 225 and magnet both

ends

222a, 222b is parallel to each other, make arc surface 223 identical to the distance (D1) of the center O2 of rotor 22, and first tilting section 224 is to the distance (D2) of the center O2 of rotor 22, by arc surface 223 decrescence towards second tilting section 225, and two tilting sections 225 are to the distance (D3) of the center O2 of rotor 22, by first tilting section 224 decrescence towards tangent section 226, so rotor magnetic pole 221 is to the distance of the center O2 of rotor 22, reduce gradually towards tangent section 226 (D4) by arc surface 223 (D1), and each arc surface 223 formed angle is θ, when making the quantity of rotor magnetic pole be P, it satisfies the condition of (120/P) degree≤θ≤(200/P) spend, and as among this figure embodiment, the quantity of this rotor magnetic pole is 4, so 30 degree≤θ≤50 degree.

Moreover, further be provided with plural air vent hole 228 on this rotor 22, and can be equipped with rivet hole 229, can strengthen the structural strength of rotor 22, or do not wear rivet hole and when keeping the empty state of each air vent hole 228, can reduce the moment of inertia of rotor, and can be used as the usefulness of heat radiation.

What deserves to be mentioned is that the present invention has electric motor structure to have following advantage compared to habit:

1, the arc of rotor of the present invention surface is all identical with the distance of rotor center, makes flux can not concentrate.

2, formed dented space between each rotor, the distance of itself and rotor center is reduced towards tangent section gradually by the arc surface, can reduce the change of flux amount, and then reduce the high order harmonic component composition that electric power wave shape is contained, with the efficient of abundant raising motor.

3, set plural air vent hole on the rotor can reduce the moment of inertia of rotor, and can be used as the usefulness of heat radiation.

4, be equipped with rivet hole in each air vent hole, can strengthen the structural strength of rotor.

Technology contents of the present invention and technical characterstic the sixth of the twelve Earthly Branches disclose as above, yet the personage who is familiar with this technology still may do various replacement and the modifications that do not deviate from this case invention spirit based on announcement of the present invention.Therefore, protection scope of the present invention should be not limited to those disclosed embodiments, and should comprise various do not deviate from replacement of the present invention and modifications, and is contained by following claim.

Claims

1, a kind of permanent magnet motor, it includes:

One stator, this stator have a circular body portion and plural magnetic pole of the stator, and each magnetic pole of the stator is convexly set in this main part inside, and in each magnetic pole of the stator and be formed with an accommodation space;

One rotor, the slightly conglobate lamellar body of this rotor is arranged in this accommodation space, and and each magnetic pole of the stator between have air gap, this rotor also is formed with plural rotor magnetic pole, and in each rotor magnetic pole and be provided with magnet;

Wherein, first and second tilting section that each rotor magnetic pole is provided with arc surface and is extended in regular turn by both sides, arc surface, the slope of this first tilting section then constitutes a dented space with tangent section connection less than the slope of second tilting section between second tilting section of adjacent rotor magnetic pole;

The both ends of each magnet then are located near 2 second tilting section places, and each magnet central part is towards rotor center place indent;

The centre of rotor place is located in one rotating shaft, connects as one with rotor.

2, permanent magnet motor according to claim 1, wherein, the angle that this arc surface forms is θ, when making the quantity of rotor magnetic pole be P, it satisfies the condition of (120/P) degree≤θ≤(200/P) spend.

3, permanent magnet motor according to claim 1, wherein, the quantity of this rotor magnetic pole is that P is an even number.

4, permanent magnet motor according to claim 1, wherein, this second tilting section and magnet end are parallel to each other.

5, permanent magnet motor according to claim 1, wherein, this rotor is provided with plural air vent hole.

6, as permanent magnet motor as described in the claim 5, wherein, can be equipped with rivet hole in this air vent hole.

7, permanent magnet motor according to claim 1, wherein, each magnet central part slightly is V-shape or camber towards rotor center place indent.

8, as permanent magnet motor as described in claim 1 or 7, wherein, be provided with more than one magnet in each rotor magnetic pole.

9, as permanent magnet motor as described in the claim 4, wherein, each magnet central part is towards rotor center place indent, and this magnet central part is flat part, and the both ends of both sides then expand outwardly; Perhaps each magnet central part is towards rotor center place indent, and this magnet central part is arc portion, and this arc portion is towards rotor center place evagination, and the both ends of both sides then expand outwardly.

10, permanent magnet motor according to claim 1, wherein, each magnet forms flat.