CN201094147Y

CN201094147Y - Structure improvement of permanent-magnet electric motor

Info

Publication number: CN201094147Y
Application number: CNU2007201954169U
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: 2008-07-30
Anticipated expiration: 2017-10-31

Abstract

The utility model relates to the improvement of a permanent magnetic motor structure, which is provided with a stator, a rotor and a rotor axis, wherein, the rotor forms a plurality of rotor magnetic poles, each rotor magnetic pole is provided with an arc-shaped surface, a first and a second tilting segments extending on both sides of the arc-shaped surface, and the second tilting segments of adjacent rotor magnetic poles are connected by a tangent to form sunken space. A plurality of magnets are arranged in each rotor magnetic pole, and both end parts of each magnet are arranged near two second tilting segments. The central part of each magnet sinks towards the center of the rotor, then, the integral permanent magnetic motor is enabled to reduce magnetic beam quantity changes and lower higher harmonic component contained by an electrification power waveform, and the motor efficiency is fully improved.

Description

The structural improvement of permanent magnet motor

Technical field

The relevant a kind of permanent magnet motor of the utility model 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 structural improvement 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, with this conduction that rotatablely moves come out after, just can provide required mechanical energy.Wherein, utilize magnet itself to have the characteristic of magnetic, used the person that provides the magnetic flux, be permanent-magnet motor, because permanent-magnet motor can form bigger torque, usefulness and accuracy in limited volume also higher, so on market, attracted attention.

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.

The utility model content

The technical problem that the utility model solved is to provide a kind of and reduces the change of flux amount 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.

The technical solution of the utility model is: this permanent magnet motor 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.

The beneficial effects of the utility model are:

1, the arc of the utility model rotor 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 increased 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.

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 in the utility model and the structural representation of stator;

Fig. 3 is the structural representation of the utility model rotor;

Fig. 4 is the part structure for amplifying schematic diagram of the utility model rotor 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

Characteristics of the present utility model can be consulted the detailed description of the graphic and embodiment of this case and obtained to be well understood to.

The rotor that the utility model 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.

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, cumulative by arc surface 223 towards second tilting section 225, and two tilting sections 225 are to the distance (D3) of the center O2 of rotor 22, cumulative by first tilting section 224 towards tangent section 226, so rotor magnetic pole 221 is to the distance of the center O2 of rotor 22, increase 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 utility model has electric motor structure to have following advantage compared to habit:

Technology contents of the present utility model 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 utility model spirit based on announcement of the present utility model.Therefore, protection range of the present utility model should be not limited to those disclosed embodiments, and should comprise various do not deviate from replacement of the present utility model and modifications, and is contained by following claim.

Claims

1. the structural improvement of a permanent magnet motor is characterized in that, 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;

The plural number rotor magnetic pole, 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 with a tangent section and the formation dented space between second tilting section of adjacent rotor magnetic pole, the slope of this first tilting section is less than the slope of second tilting 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;

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

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

3. the structural improvement of permanent magnet motor according to claim 1 is characterized in that the quantity of this rotor magnetic pole is that P is an even number.

4. the structural improvement of permanent magnet motor according to claim 1 is characterized in that this second tilting section and magnet both ends are parallel to each other.

5. the structural improvement of permanent magnet motor according to claim 1 is characterized in that this rotor is provided with plural air vent hole.

6. as the structural improvement of permanent magnet motor as described in the claim 5, it is characterized in that, can be equipped with rivet hole in this air vent hole.

7. the structural improvement of permanent magnet motor according to claim 1 is characterized in that each magnet central part slightly is V-shape or camber towards rotor center place indent.

8. as the structural improvement of permanent magnet motor as described in claim 1 or 7, it is characterized in that, be provided with more than one magnet in each rotor magnetic pole.

9. as the structural improvement of permanent magnet motor as described in the claim 4, it is characterized in that each magnet central part is towards rotor center place indent, and this magnet central part is flat part, 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. the structural improvement of permanent magnet motor according to claim 1 is characterized in that, each magnet forms flat.