CN215646471U - Novel permanent magnet synchronous generator - Google Patents

Novel permanent magnet synchronous generator Download PDF

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Publication number
CN215646471U
CN215646471U CN202120628088.7U CN202120628088U CN215646471U CN 215646471 U CN215646471 U CN 215646471U CN 202120628088 U CN202120628088 U CN 202120628088U CN 215646471 U CN215646471 U CN 215646471U
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CN
China
Prior art keywords
rotor
permanent magnet
stator
winding
machine shell
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CN202120628088.7U
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Chinese (zh)
Inventor
钱有祥
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Qian Youxiang
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Qian Youxiang
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Abstract

The utility model discloses a novel permanent magnet synchronous generator, which comprises a shell, an end cover, a rotor shaft, a rotor, a stator and a winding, wherein the end cover is arranged on the shell; end covers are arranged at two ends of the shell; a rotor shaft is arranged in the machine shell, is positioned on the axis of the machine shell and extends out of the end covers at the two ends of the machine shell; a sealing bearing is arranged between the end cover and the rotor shaft; a rotor is coaxially sleeved outside the rotor shaft, a permanent magnet is coaxially arranged outside the rotor, and a stator is coaxially sleeved outside the permanent magnet; a winding is arranged in a stator slot of the stator; insulation paper is arranged between the winding and the stator slot; the casing is internally provided with a spiral water channel which is wound around the axis of the casing. Two ends of the spiral water channel are communicated with the outside, and are respectively a water inlet and a water outlet for introducing and discharging cooling water.

Description

Novel permanent magnet synchronous generator
Technical Field
The utility model relates to the technical field of generators, in particular to a novel permanent magnet synchronous generator.
Background
The permanent magnet synchronous motor provides excitation by the permanent magnet, so that the structure of the motor is simpler, the processing and assembling cost is reduced, a collecting ring and an electric brush which are easy to cause problems are omitted, and the running reliability of the motor is improved; and because excitation current is not needed, excitation loss is avoided, and the efficiency and the power density of the motor are improved.
The permanent magnet synchronous motor is mainly composed of a stator, a rotor, an end cover and the like, wherein the stator is formed by laminating laminations to reduce iron loss generated when the motor operates, and a three-phase alternating current winding, namely an armature, is arranged in the stator. The rotor may be made in solid form or may be pressed from laminations which carry the permanent magnet material.
The existing synchronous generator has poor power generation performance during hydroelectric generation, and needs to be improved urgently.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a novel permanent magnet synchronous generator, which improves the working performance of the generator through improving the structure.
In order to achieve the purpose, the technical scheme adopted by the utility model is as follows:
the novel permanent magnet synchronous generator comprises a shell, an end cover, a rotor shaft, a rotor, a stator and a winding; end covers are arranged at two ends of the shell; a rotor shaft is arranged in the machine shell, is positioned on the axis of the machine shell and extends out of the end covers at the two ends of the machine shell; a sealing bearing is arranged between the end cover and the rotor shaft; a rotor is coaxially sleeved outside the rotor shaft, a permanent magnet is coaxially arranged outside the rotor, and a stator is coaxially sleeved outside the permanent magnet; a winding is arranged in a stator slot of the stator; insulation paper is arranged between the winding and the stator slot; the casing is internally provided with a spiral water channel which is wound around the axis of the casing. Two ends of the spiral water channel are communicated with the outside, and are respectively a water inlet and a water outlet for introducing and discharging cooling water.
As a preferred solution, the number of stator slots is 18, evenly distributed around the stator axis.
As a preferred technical scheme, the winding is a double-layer winding, and the conductor material in the winding is copper; the number of parallel branches is 1; the winding pitch is 4; the number of turns of each layer of winding coil is 4; the number of the wound coils of each turn of coil is 6; the outer diameter of each wire conductor is 2 mm; the thickness of the double-side insulation is 0.1 mm; the bath fullness was 78.1%.
As a preferred solution, the rotor outer diameter (mm): 133; the inner diameter of the rotor is 67 mm; the length of the iron core is 210 mm; the number of rotor poles is 4; the lamination coefficient is 0.95; the rotor is a silicon steel sheet and the mark is DW310_ 35.
As a preferred technical scheme, the thickness of the permanent magnet is 10; the mechanical pole arc coefficient is 0.8; the outer arc angle of the permanent magnet is 144 degrees; the remanence of the magnetic steel is 1.23; the coercive force is 890 kA/m; the relative recoil magnetic permeability is 1.0998; the magnetizing mode is parallel magnetizing; the permanent magnet is NdFe 3.
As a preferred technical scheme, the gap between the shell and the stator core is 0.005 mm; the clearance between the rotor iron core and the rotating shaft is 0.003 mm; the gap between the wall of the stator slot and the insulating paper is 0.05 mm; the thickness of the insulating paper is 0.2 mm; the clearance between the end covers at the two ends and the machine shell is 0.005 mm.
Drawings
Fig. 1 is a cross-sectional view of the present invention.
Fig. 2 is a schematic view of a stator slot structure.
Fig. 3 is a schematic structural view of the rotor.
Fig. 4 is a schematic diagram of the structure of the winding.
Fig. 5 is a schematic view of the temperature distribution 1.
Fig. 6 is a schematic view of the temperature distribution 2.
Wherein the reference numerals are as follows: 1-machine shell, 2-end cover, 3-rotor shaft, 4-rotor, 5-permanent magnet, 6-stator, 7-winding and 8-spiral water channel.
Detailed Description
The present invention aims to overcome the defects of the prior art and provide a novel permanent magnet synchronous generator, which is further described in detail with reference to the following embodiments.
Examples
The novel permanent magnet synchronous generator is the same as the prior art and comprises a machine shell 1, an end cover 2, a rotor shaft 3, a rotor 4, a stator 6 and a winding 7.
Two ends of the casing 1 are provided with end covers 2. A rotor shaft 3 is arranged in the machine shell, and the rotor shaft 3 is positioned on the axis of the machine shell 1 and extends out of the end covers 2 at two ends of the machine shell 1. And a sealing bearing is arranged between the end cover 2 and the rotor shaft 3. The rotor shaft 3 is coaxially sleeved with a rotor 4, and the rotor 4 is coaxially provided with a permanent magnet 5. The stator 6 is coaxially sleeved outside the permanent magnet 5. The stator 6 has windings 7 in its stator slots. And insulating paper is arranged between the winding 7 and the stator slot.
In the present embodiment, as shown in fig. 1, a spiral water channel 8 is disposed in the casing and spirally extends around the axis of the casing. Two ends of the spiral water channel 8 are communicated with the outside, and are respectively provided with a water inlet and a water outlet for introducing and discharging cooling water. The cooling of the generator can be realized through the spiral water channel so as to ensure the continuous work of the generator.
As shown in fig. 4. In this embodiment, the number of stator slots is 18, evenly distributed about the stator axis. The stator slot number makes the pole slot cooperate for 36/8 (18/4) motor, and noise, cogging torque etc. are less bad factor, and the performance is better. Therefore, the pole slot cooperation that this embodiment adopted makes the noise little, and the performance is good.
In this embodiment, the structure of the stator slot is shown in fig. 2. Wherein, the parameters of each part are as follows:
hs0 (mm): 1.6;hs1 (mm): 1;hs2 (mm): 10.5;bs0 (mm): 5.2;bs1 (mm): 15.7;bs2 (mm): 16.1。
in the present embodiment, the structure of the winding is shown in fig. 4; the winding is a double-layer winding, and in the winding, the conductor material: copper; number of parallel branches: 1; winding pitch: 4; number of turns of each layer of winding coil: 4; number of wound coils per turn: 6; outer diameter (mm) of each wire conductor: 2; double-sided insulation thickness (mm): 0.1; the tank fullness rate (%): 78.1.
In this embodiment, the structure of the rotor is shown in fig. 3, in which: rotor outer diameter (mm): 133; rotor inner diameter (mm): 67; core length (mm) 210; number of rotor poles: 4; the laminating coefficient is as follows: 0.95; silicon steel sheet mark: DW310_ 35.
In this embodiment, the structure of the permanent magnet is as shown in fig. 3, wherein the thickness h (mm) of the permanent magnet: 10; mechanical pole arc coefficient: 0.8; permanent magnet outer arc angle α (degree): 144, 144; permanent magnet brand: NdFe 35; magnetic steel remanence (Tesla): 1.23; coercive force (kA/m): 890; 1.0998 relative recovery magnetic permeability; and (3) magnetizing mode: and (5) parallel magnetization.
First, the electromagnetic part Loss and efficiency analysis (Loss and efficiency) of the motor
1. Phase resistance calculation under rated conditions:
number of coils per slot: ns =8
Number of parallel branches:
number of windings-wire diameter: nt-d =6-2
Winding pitch: 4
Stator per-phase resistance R (75 degrees): 0.02 omega
2. And (3) calculating loss and efficiency:
rated output power:
P1=110000W
total iron loss:
1173.3W
stator winding copper loss:
Pcu=mI^2R=2079.48W
mechanical loss:
Pfw=340W
total loss:
P2=1173.3+2079.48+340=3592.78W
efficiency:
n= 100%*P1/ (P1+ P2) %=96.84%。
secondly, analyzing the integral structure and the thermal property of the motor
1. In this embodiment, the structure and the major dimensions of the generator are shown in the following table:
2. heat dissipation condition and structure key parameter of motor
And (3) water-cooling heat dissipation conditions:
coolant component Water
Coolant flow 14L/min (0.000233m3/s)
Inlet temperature of coolant is 40 deg.C
The working environment temperature is 40 ℃.
Key parameter of technological process
The gap between the casing and the stator core is 0.005mm
The clearance between the rotor core and the rotating shaft is 0.003mm
The gap between the wall of the stator slot and the insulating paper is 0.05mm
The thickness of the insulating paper is 0.2mm
The clearance between the end covers at the two ends and the machine shell is 0.005 mm.
The temperature distribution schematic diagram 5-6 is as follows:
the utility model has the beneficial effects that: the electromagnetic torque in the design structure is larger, and the power generation capacity is larger. The maximum torque, the electromagnetic load and the main size of the permanent magnet synchronous motor satisfy the following relational expression:
in the formula (I), the compound is shown in the specification,andrespectively the amplitude of the air gap flux density fundamental wave and the electric load,the axial length of the motor is taken as the length,is the outer diameter of the motor stator
Therefore, in order to obtain larger electromagnetic torque, the thickness and the pole arc coefficient of the permanent magnet are increased or the permanent magnet with higher performance is adopted to increase the amplitude of the air gap flux density fundamental wave; increasing the size of the motor; the number of turns of the coil, the rated current and the winding coefficient are increased to improve the electrical load of the motor. And these dimensions satisfy other constraints.
According to the utility model, the designed structure and parameters enable the generator to have lighter weight and smaller volume under the condition of the same power generation effect.
The main size formula of the motor:
it is easy to know that under the premise of ensuring that the electromagnetic torque is not changed, the size of the motor can be reduced by improving the electrical load and the magnetic flux density fundamental wave amplitude of the air gap, but on the premise of ensuring that parameters such as the thermal load, the electrical density and the like cannot be too large.
It should be noted that, based on the above-mentioned structural design, in order to solve the same technical problems, even if some insubstantial modifications or tints are made on the utility model, the essence of the adopted technical solution is the same as the utility model, and therefore, the technical solution should be within the protection scope of the utility model.

Claims (3)

1. The novel permanent magnet synchronous generator comprises a shell, an end cover, a rotor shaft, a rotor, a stator and a winding; end covers are arranged at two ends of the shell; a rotor shaft is arranged in the machine shell, is positioned on the axis of the machine shell and extends out of the end covers at the two ends of the machine shell; a sealing bearing is arranged between the end cover and the rotor shaft; a rotor is coaxially sleeved outside the rotor shaft, a permanent magnet is coaxially arranged outside the rotor, and a stator is coaxially sleeved outside the permanent magnet; a winding is arranged in a stator slot of the stator; insulation paper is arranged between the winding and the stator slot; the cooling water cooling device is characterized in that a spiral water channel which is arranged around the axis of the machine shell in a spiral manner is arranged in the machine shell, two ends of the spiral water channel are communicated with the outside, and are respectively provided with a water inlet and a water outlet which are used for introducing and discharging cooling water;
the thickness of the permanent magnet is 10; the mechanical pole arc coefficient is 0.8; the outer arc angle of the permanent magnet is 144 degrees; the remanence of the magnetic steel is 1.23; the coercive force is 890 kA/m; the relative recoil magnetic permeability is 1.0998; the magnetizing mode is parallel magnetizing; the permanent magnet is NdFe 3;
rotor outer diameter: 133 mm; the inner diameter of the rotor is 67 mm; the length of the iron core is 210 mm; the number of rotor poles is 4; the lamination coefficient is 0.95; the rotor is a silicon steel sheet with the mark of DW310_ 35;
the winding is a double-layer winding, and the conductor material in the winding is made of copper; the number of parallel branches is 1; the winding pitch is 4; the number of turns of each layer of winding coil is 4; the number of the wound coils of each turn of coil is 6; the outer diameter of each wire conductor is 2 mm; the thickness of the double-side insulation is 0.1 mm; the bath fullness was 78.1%.
2. The new permanent magnet synchronous generator according to claim 1, characterized in that the number of stator slots is 18, evenly distributed around the stator axis.
3. The novel permanent magnet synchronous generator according to claim 1, wherein the gap between the casing and the stator core is 0.005 mm; the clearance between the rotor iron core and the rotating shaft is 0.003 mm; the gap between the wall of the stator slot and the insulating paper is 0.05 mm; the thickness of the insulating paper is 0.2 mm; the clearance between the end covers at the two ends and the machine shell is 0.005 mm.
CN202120628088.7U 2021-03-29 2021-03-29 Novel permanent magnet synchronous generator Active CN215646471U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202120628088.7U CN215646471U (en) 2021-03-29 2021-03-29 Novel permanent magnet synchronous generator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202120628088.7U CN215646471U (en) 2021-03-29 2021-03-29 Novel permanent magnet synchronous generator

Publications (1)

Publication Number Publication Date
CN215646471U true CN215646471U (en) 2022-01-25

Family

ID=79913888

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202120628088.7U Active CN215646471U (en) 2021-03-29 2021-03-29 Novel permanent magnet synchronous generator

Country Status (1)

Country Link
CN (1) CN215646471U (en)

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