CN103023166A

CN103023166A - Motor

Info

Publication number: CN103023166A
Application number: CN2011102856323A
Authority: CN
Inventors: 余文和; 陈富荣; 朱振南
Original assignee: Rechi Precision Co Ltd
Current assignee: Rechi Precision Co Ltd
Priority date: 2011-09-23
Filing date: 2011-09-23
Publication date: 2013-04-03

Abstract

The invention relates to a motor which is provided with a stator, a rotor and a rotary shaft. A plurality of rotor magnetic poles are formed on the rotor. Each rotor magnetic pole is provided with a magnet. The magnet part close to the outer side is a concave arc-shaped face, and first, second and third planes are formed close to the inner side. The arc-shaped face is respectively connected with the first and third planes by connecting faces. Each connecting face is close to the circumferential face of the rotor. The included angles formed between the first and second planes and between the third and second planes are respectively theta1 and theta2. When the number of the rotor magnetic poles is P, the condition of [90+(180/P)] degree is met. The slope of tail tangent of the arc-shaped plane close to the first plane is smaller than or equal to the slope of the first plane, and the slope of tail tangent of the arc-shaped plane close to the third plane is smaller than or equal to the slope of the third plane, so that, the use level of magnets is increased in a valid area of the rotor through the design of the magnets, therefore, the efficiency of the motor is improved.

Description

Motor

Technical field

The relevant a kind of motor of the present invention can increase the magnet consumption providing a kind of, with the motor of raising the efficiency in the rotor effective area.

Background technology

Now in the industrial circle, the motion that often need to provide power to do 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, therefore be widely used on the devices such as various industry, electrical equipment, transportation system, become a kind of indispensable equipment.

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

See also the structural representation that Figure 1 shows that the known permanent magnet motor 10 of the first, it comprises a rotor 11 and a stator 12, be provided with a plurality of magnet 111 on this rotor 11, 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 mutually sheathed, just form an air gap between rotor 11 and the stator 12, when coil alives, acted on each other by the magnet 111 of the made magnetic pole of the stator 121 of magnetic conductivity material by rotor 11, namely produce one and rotatablely move; This rotor 11 can have an axle 13 in addition, in order to 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, as shown in the figure take quadrupole motor as example, therefore have four rotor magnetic poles 112, the magnet 111 that each rotor magnetic pole 112 is set, its shape is several to be arc cross section (cambered surface by two different radiis consists of).Because magnet 111 places rotor 11, therefore mechanical strength is high, installation and processing are all simpler, and cost is lower.The magnet volume that just effectively utilizes is less, and magnetic flux is less, therefore can't fully improve the efficient of motor.

Be illustrated in figure 2 as the TaiWan, China patent announcement number No. 582670, patent name " permanent magnet rotor type electric motor ", it comprises a rotor 11 and a stator 12 equally, is provided with a plurality of magnet 111 on this rotor 11, and its shape is several to be fan-shaped cross section.Though its magnet volume that effectively utilizes is larger, easily produces running noise.

Summary of the invention

Main purpose of the present invention namely can increase the magnet consumption providing a kind of in the rotor effective area, with the motor of raising the efficiency.

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 a magnet, each magnet is the cambered surface of an indent near the outside, and close inboard is formed with first, second, the 3rd plane, and this cambered surface and first, the 3rd interplanar then interconnects with joint face respectively, each joint face is the side face of close this rotor then, this is first years old, the angle that the 3rd plane and this second plane form is respectively θ 1, θ 2, when making the quantity of rotor magnetic pole be P, it satisfies the condition of [90+ (180/P)] degree, and the slope that is less than or equal to the first plane in this cambered surface near the terminal tangent slope on the first plane, the slope that is less than or equal to the 3rd plane in this cambered surface near the terminal tangent slope on the 3rd plane, design by above-mentioned magnet can increase the magnet consumption in the rotor effective area, improving the efficient of motor, and the noise can reduce running the time.

Description of drawings

Fig. 1 is the structural representation of the known motor rotor of the first and stator.

Fig. 2 is the structural representation of the known motor rotor of the second and stator.

Fig. 3 is the first example structure schematic diagram of motor rotor of the present invention and stator.

Fig. 4 is the first embodiment structure for amplifying schematic diagram of magnet among the present invention.

Fig. 5 is the second example structure schematic diagram of motor rotor of the present invention and stator.

The running efficiency key diagram of the known motor of expression the first shown in Figure 6 (as shown in Figure 1) and motor of the present invention.

The cogging torque of the known motor of expression the first shown in Figure 7 (as shown in Figure 1) is corresponding to the oscillogram of rotor-position.

The cogging torque of expression shown in Figure 8 motor of the present invention is corresponding to the oscillogram of rotor-position.

Represent that as shown in Figure 9 the cogging torque of the known motor of the second and motor of the present invention is corresponding to the oscillogram of rotor-position.

The figure number explanation:

Permanent magnet motor 10

Rotor 11

Magnet 111

Rotor magnetic pole 112

Stator 12

Magnetic pole of the stator 121

Axle 13

Permanent magnet motor 20

Stator 21

Circular body portion 211

Magnetic pole of the stator 212

Rotor 22

Rotor magnetic pole 221

Magnet 222

Rivet hole 224

Rotating shaft 23

Terminal A

Tangent line LA

Terminal B

Tangent line LAB

Cambered surface R1

The first planar S 1

The second planar S 2

The 3rd planar S 3

Joint face S4.

Embodiment

The present invention is improved mainly for general motor, and as shown in Figures 3 and 4, this permanent magnet motor 20 includes: stator 21, rotor 22 and rotating shaft 23.

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.

This rotor 22 is arranged in this accommodation space, 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, when the quantity of rotor magnetic pole was P, the quantity of this magnetic pole of the stator satisfied the condition of [P+ (P/2)], and this enforcement is take quadrupole motor as example, therefore have four rotor magnetic poles 221, and four magnetic pole of the stator 212.

Plural number magnet 222, be located at respectively in each rotor magnetic pole 221, each magnet 222 is iron oxygen material, each magnet 222 is the cambered surface R1 of an indent near the outside, and close inboard is formed with first, second, the 3rd planar S 1, S2, S3, and this cambered surface R1 and first, the 3rd planar S 1, then interconnect with joint face S4 respectively between S3, each joint face S4 is the side face of close this rotor 22 then, this is first years old, the 3rd planar S 1, the angle that S3 and this second planar S 2 form is respectively θ 1, θ 2, when making the quantity of rotor magnetic pole 221 be P, it satisfies the condition of [90+ (180/P)] degree, among the embodiment as shown in the figure, P=4, and θ 1=θ 2=135 degree, and be less than or equal to the slope of the first planar S 1 near tangent line (LA) slope of the terminal A of the first planar S 1 in this cambered surface R1, in the tangent line (L of this cambered surface R1 near the terminal B of the 3rd planar S 3 _B) slope is less than or equal to the slope of the 3rd planar S 3, the first planar S 1 and the 3rd planar S 3 of this adjacent magnets 222 are parallel to each other.

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

Shown in the second embodiment of Fig. 5, this motor 20 is the sextupole motor, thus have six rotor magnetic poles 221, and nine magnetic pole of the stator 212, and the magnet 222 on each rotor magnetic pole 221 meets above-mentioned condition equally.

Therefore during motor operation of the present invention, can in the rotor effective area, increase the magnet consumption by the design of above-mentioned magnet, improving the efficient of motor, and the noise can reduce running the time.

The running efficiency key diagram that represents as shown in Figure 6 the known motor of the first (as shown in Figure 1) and motor of the present invention.As shown in the figure, under identical running rotating speed, the running efficiency of motor of the present invention is relatively high.Represent that as shown in Figure 7 the cogging torque (Cogging Torque) of the known motor of the first (as shown in Figure 1) is corresponding to the oscillogram of rotor-position.Represent that as shown in Figure 8 the cogging torque (Cogging Torque) of motor of the present invention is corresponding to the oscillogram of rotor-position, this dynamic torque is that motor is not excitatory lower, rotor magnet and stator teeth groove interact and the torque of generation, this size can affect the vibrating noise of motor, if numerical value is higher, usefulness or the generation that may affect motor vibrated, the situation of noise is comparatively serious, if numerical value is lower, can reduce the chance of vibration, noise producing; And a dynamic torque of motor of the present invention is lower as can be known with Fig. 7 and Fig. 8, effectively reduces vibration, reduces noise.

Represent that as shown in Figure 9 the cogging torque of the known motor of the second (as shown in Figure 2) and motor of the present invention is corresponding to the oscillogram of rotor-position.Its torque waveform of motor of the present invention is closeer as figure shows, and amplitude is lower, makes motor shake performance when low-speed running better.

Moreover, further being provided with rivet hole 224 on this rotor magnetic pole 221, the distance of the cambered surface R1 of this rotor magnetic pole and rivet hole 224 is greater than 0.5mm, can strengthen the structural strength of rotor 22, or do not wear rivet hole and when keeping empty state, can reduce the moment of inertia of rotor, and can be used as the usefulness of heat radiation.

Claims

1. a motor is characterized in that, it includes:

One stator, this stator have a circular body portion and plural magnetic pole of the stator, and it is inner that each magnetic pole of the stator is convexly set in this main part, 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;

Plural number magnet, be located at respectively in each rotor magnetic pole, each magnet is the cambered surface of an indent near the outside, and close inboard is formed with first, second, the 3rd plane, and this cambered surface and first, the 3rd interplanar then interconnects with joint face respectively, each joint face is the side face of close this rotor then, this is first years old, the angle that the 3rd plane and this second plane form is respectively θ 1, θ 2, when making the quantity of rotor magnetic pole be P, it satisfies the condition of [90+ (180/P)] degree, and is less than or equal to the slope on the first plane near the terminal tangent slope on the first plane in this cambered surface, the slope that is less than or equal to the 3rd plane in this cambered surface near the terminal tangent slope on the 3rd plane; And

The center of rotor is located in one rotating shaft, is made as one with rotor.

2. motor as claimed in claim 1 is characterized in that, the first plane and the 3rd plane of this adjacent magnets are parallel to each other.

3. motor as claimed in claim 1 or 2 is characterized in that, this rotor magnetic pole is provided with rivet hole.

4. motor as claimed in claim 3 is characterized in that, the cambered surface of this rotor magnetic pole and the distance of rivet hole are greater than 0.5mm.

5. motor as claimed in claim 1 or 2 is characterized in that, this P is even number, and the quantity of this magnetic pole of the stator is [P+ (P/2)].

6. motor as claimed in claim 1 or 2 is characterized in that, this magnet is iron oxygen material.