CN213990462U - Permanent magnet synchronous motor - Google Patents

Permanent magnet synchronous motor Download PDF

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Publication number
CN213990462U
CN213990462U CN202023312565.3U CN202023312565U CN213990462U CN 213990462 U CN213990462 U CN 213990462U CN 202023312565 U CN202023312565 U CN 202023312565U CN 213990462 U CN213990462 U CN 213990462U
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CN
China
Prior art keywords
rotor
end cover
permanent magnet
stator
magnet synchronous
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CN202023312565.3U
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Chinese (zh)
Inventor
魏武岗
王晶
冯临
杨华
邹波
赵春明
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Shaanxi Aerospace Xinuo Meiling Electric Co ltd
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Shaanxi Aerospace Xinuo Meiling Electric Co ltd
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Abstract

The utility model belongs to the technical field of the motor, concretely relates to permanent magnet synchronous motor. The utility model comprises a casing, a stator, a rotor, a front end cover, a rear end cover, a front bearing, a rear bearing and a rotating shaft; the stator is arranged in the shell; the rotor is arranged in the stator, and the center of the rotor is connected with a rotating shaft; the two ends of the shell are respectively provided with a front end cover and a rear end cover, a front bearing and a rear bearing are respectively arranged in the centers of the front end cover and the rear end cover, and the rotating shaft is horizontally connected on the front end cover and the rear end cover through the front bearing and the rear bearing; the rotor comprises an iron core and a permanent magnet; a plurality of grooves are axially arranged on the outer side surface of the iron core in parallel, and the permanent magnets are embedded in the grooves. The embedded permanent magnet structure ensures the safety and reliability of the rotor structure. The utility model discloses effectively reduce vortex and hysteresis loss, improved motor production efficiency.

Description

Permanent magnet synchronous motor
Technical Field
The utility model belongs to the technical field of the motor, concretely relates to permanent magnet synchronous motor.
Background
The DBF2 series transformer fan, which is independently developed and manufactured by the Sino corporation, is in the leading position of the industry. Since the development in the field is earlier and the technical modification is timely, the dominant position in the field is basically guaranteed in China. The motor used by the fan adopts a self-designed short iron core and multi-radiating fin structure. Reliable performance and safe use, but low motor efficiency. Along with the improvement of the requirement of domestic and foreign users on the energy efficiency of the motor, the development of the special high-energy-efficiency motor for the transformer fan is increasingly urgent.
SUMMERY OF THE UTILITY MODEL
The utility model provides a PMSM, aim at provides a motor of high energy efficiency.
In order to realize the purpose, the utility model discloses a technical scheme is:
a permanent magnet synchronous motor comprises a shell, a stator, a rotor, a front end cover, a rear end cover, a front bearing, a rear bearing and a rotating shaft; the stator is arranged in the shell; the rotor is arranged in the stator, and the center of the rotor is connected with a rotating shaft; the two ends of the shell are respectively provided with a front end cover and a rear end cover, a front bearing and a rear bearing are respectively arranged in the centers of the front end cover and the rear end cover, and the rotating shaft is horizontally connected to the front end cover and the rear end cover through the front bearing and the rear bearing; the rotor comprises an iron core and a permanent magnet; the iron core is characterized in that a plurality of groups of strip-shaped through holes which are communicated up and down are arranged on the side wall of the iron core along the axial direction in a circular array mode, and the permanent magnets are embedded in the strip-shaped through holes.
The winding of the stator adopts a centralized winding with the pitch of 1, and the length of the end part of the winding is not more than 15 mm.
The inside wall of the iron core of the stator is provided with 12 tooth grooves, and the rotor is provided with 10 groups of permanent magnets.
The stator sheets and the rotor sheets on the stator and the rotor are both made of cold-rolled silicon steel plate materials with the thickness of 0.35 mm.
The outer surface of the shell is provided with a plurality of radiating grooves.
And two strip-shaped through holes are formed in each group of the plurality of groups of strip-shaped through holes which are communicated up and down.
The device also comprises a controller; the controller is connected to the rear end cover and electrically connected with the stator.
The controller at least comprises a speed regulator, a current distributor, two current regulators, an inverter, a position detection unit and a calculation control unit; the calculation control unit is respectively connected with the speed regulator and the position detection unit through electric signals; the current distributor is respectively connected with the speed regulator, the current distributor and the calculation control unit through electric signals; the inverter is respectively connected with the two current regulators and the position detection unit through electric signals.
The position detection unit adopts a rotor position sensor; the rotor position sensor is coaxially and rigidly connected with the rotor.
The calculation control unit at least comprises a signal receiver, a signal transmitter, a torque command filter and a calculation analyzer; the signal receiver is in electric signal connection with the position detection unit; the calculation analyzer is respectively connected with the signal receiver and the torque command filter; the signal transmitter is electrically connected with the current distributor and the speed regulator.
Has the advantages that:
(1) the utility model discloses a rotor adopts embedded permanent magnet structure, has guaranteed rotor structure safe and reliable.
(2) The utility model discloses the stator adopts the pitch to be 1 centralized winding, has eliminated alternate winding overlap completely to reduce winding overhang length to original asynchronous machine's 1/3, reduced the copper loss effectively, improved motor production efficiency.
(3) The utility model discloses stator plate and rotor plate on stator and the rotor all adopt thickness to make for 0.35 mm's cold rolled silicon steel plate material, have effectively reduced vortex and hysteresis loss, have both reduced generating heat of motor, have improved motor efficiency again.
The above description is only an overview of the technical solution of the present invention, and in order to clearly understand the technical means of the present invention and to implement the technical solution according to the content of the description, the following detailed description is given with reference to the preferred embodiments of the present invention.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic view of the electromagnetic structure of the present invention.
Fig. 2 is a schematic diagram of the overall structure of the present invention.
Fig. 3 is a schematic view of the structure of the rotating shaft of the present invention.
Fig. 4 is a schematic structural view of the front end cover of the present invention.
Fig. 5 is a schematic structural diagram of the rotor core of the present invention.
Fig. 6 is a schematic diagram of the three-dimensional modeling structure of the stator core of the present invention.
Fig. 7 is a front view of the utility model stator core.
Fig. 8 is a front view of the housing of the present invention.
Fig. 9 is a sectional view taken along line a-a of fig. 8.
Fig. 10 is a configuration diagram of the controller of the present invention.
Fig. 11 is a schematic diagram of simulation results of the present invention.
In the figure: 1-a machine shell; 2-a stator; 3-a rotor; 4-front end cover; 5-rear end cap; 6-front bearing; 7-rear bearing; 8-a rotating shaft; 9-a speed regulator; 10-a current distributor; 11-a current regulator; 12-an inverter; 13-a calculation control unit; 14-a heat sink; 15-position detection unit.
The above description is only an overview of the technical solution of the present invention, and in order to clearly understand the technical means of the present invention and to implement the technical solution according to the content of the description, the following detailed description is given with reference to the preferred embodiments of the present invention.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The first embodiment is as follows:
referring to fig. 1 to 9, a permanent magnet synchronous motor includes a casing 1, a stator 2, a rotor 3, a front end cover 4, a rear end cover 5, a front bearing 6, a rear bearing 7, and a rotating shaft 8; the stator 2 is arranged in the shell 1; the rotor 3 is arranged in the stator 2, and the center of the rotor 3 is connected with a rotating shaft 8; the two ends of the shell 1 are respectively provided with a front end cover 4 and a rear end cover 5, a front bearing 6 and a rear bearing 7 are respectively arranged at the centers of the front end cover 4 and the rear end cover 5, and the rotating shaft 8 is horizontally connected on the front end cover 4 and the rear end cover 5 through the front bearing 6 and the rear bearing 7; the rotor 3 comprises an iron core and a permanent magnet; a plurality of grooves are axially arranged on the outer side surface of the iron core in parallel, and the permanent magnets are embedded in the grooves.
The utility model discloses a by the synchronous machine that the permanent magnet excitation produced synchronous rotating magnetic field, the permanent magnet produces rotating magnetic field as the rotor, and three-phase stator winding passes through the armature reaction under the rotating magnetic field effect, responds to three-phase symmetrical current. When three-phase symmetrical current is introduced to the stator side, the three-phase stator generates a rotating magnetic field in the space due to the fact that the phase difference of the three-phase stator is 120 in the space position, the rotor rotates under the action of electromagnetic force, at the moment, electric energy is converted into kinetic energy, and the permanent magnet synchronous motor serves as a motor.
When the rotor is used specifically, the rotor adopts an embedded permanent magnet structure, and the permanent magnet adopting N40SH NdFeB magnetic steel is used for generating an air gap magnetic field, so that the safety and the reliability of the rotor structure are ensured.
The utility model discloses an excitation magnetic field is provided by the permanent magnet, and the rotor does not need exciting current, and motor efficiency improves. Compared with an asynchronous motor, the motor saves electric energy at any rotating speed point, the advantage is particularly obvious when the rotating speed is low, and the efficiency of a sample machine reaches more than 90%.
Example two:
referring to fig. 1, 2 and 6, in a permanent magnet synchronous motor, on the basis of the first embodiment, the winding of the stator 2 adopts concentrated winding with a pitch of 1, and the length of the winding end is not more than 15 mm.
In actual use, the stator 2 adopts concentrated windings with the pitch of 1, so that overlapping of interphase windings can be completely eliminated.
The length of the winding end part is not more than 15mm, the length of the winding end part is reduced to 1/3 of the length of the winding end part of the asynchronous motor in the prior art, the copper loss is effectively reduced, and the production efficiency of the motor is improved.
Example three:
referring to fig. 1, 2, 6 and 7, in a permanent magnet synchronous motor according to one or two embodiments, 12 tooth slots are provided on an inner side wall of an iron core of a stator 2, and 10 groups of permanent magnets are provided on a rotor 3.
In practical use, the design of 10 poles and 12 slots in the technical scheme is adopted, so that the utilization rate of the tooth slot matched with the winding reaches 93.3 percent, and the motor is more suitable for a low-speed motor.
Example four:
referring to fig. 1, 2, 5-7, in a permanent magnet synchronous motor according to a first embodiment, stator sheets and rotor sheets of the stator 2 and the rotor 3 are made of cold-rolled silicon steel plates with a thickness of 0.35 mm.
In practical use, the technical scheme effectively reduces eddy current and hysteresis loss.
Example five:
referring to fig. 2, 8 and 9, in a permanent magnet synchronous motor according to a first embodiment: the machine shell 1 is provided with radiating fins.
In actual use, the arrangement of the radiating fins on the casing 1 not only reduces the heat generation of the motor, but also improves the efficiency of the motor.
Example six:
referring to fig. 2 and 10, in a first embodiment, a permanent magnet synchronous motor is shown: the device also comprises a controller; the controller is connected to the rear end cover 5 and electrically connected with the stator 2.
Further, the controller at least comprises a speed regulator 9, a current distributor 10, two current regulators 11, an inverter 12, a position detection unit 15 and a calculation control unit 13; the calculation control unit 13 is respectively connected with the speed regulator 9 and the position detection unit 15 through electric signals; the current distributor 10 is respectively connected with the speed regulator 9, the current distributor 10 and the calculation control unit 13 through electric signals; the inverters 12 are electrically connected to the two current regulators 11 and the position detection unit 15, respectively.
Furthermore, the position detecting unit 15 employs a rotor position sensor; the rotor position sensor is coaxially and rigidly connected to the rotor 3.
Further, the calculation control unit 13 at least includes a signal receiver, a signal transmitter, a torque command filter and a calculation analyzer; the signal receiver is in electric signal connection with the position detection unit 15; the calculation analyzer is respectively connected with the signal receiver and the torque command filter; the signal transmitter is connected electrically to the current distributor 10 and the speed regulator 9.
When in actual use, the utility model discloses will pass through the controller rectification with 50Hz power frequency voltage and become direct current voltage, become preset alternating voltage with the frequency contravariant that calculates according to rotor speed, rotor magnetic pole again and come driving motor. And the absolute electric zero position of the rotor position sensor is accurately debugged according to the requirement of the driver.
In this embodiment, a chip in the controller selects TMS320F2812 of the american TI company as a main driving chip to implement a high-precision control algorithm, and performs all-digital servo control on current and speed, the controller controls a current loop by using a d-q axis vector control method in the prior art to implement sinusoidal wave control of current, the controller controls a speed loop by using a PID algorithm in the prior art, and a torque command filter is combined to better solve the problem that a rotor linearly outputs torque according to line current.
Rotor position sensor and rotor 3 adopt prior art's rigid connection mode among this embodiment, have not only guaranteed the stability of connecting, and are pleasing to the eye moreover.
Example seven:
will the utility model discloses carry out the simulation experiment, obtain the result like figure 11.
According to the simulation result, the later period accords with the actual test, the output power is the same under the condition of the same voltage, the same rotating speed and the same torque, and the efficiency can reach the calculation requirement.
Example eight:
the utility model discloses with asynchronous motor performance contrast test.
Will the utility model discloses carry out the contrast experiment with prior art's three-phase asynchronous motor YF132L-12, obtain the experimental data as follows:
voltage V Current A Output power W Output speed rpm Efficiency%
Asynchronous motor 400 4.7 1100 480 35.5
Permanent magnet synchronous motor 360 2.3 1330 500 93.5
It can be seen from the table that the utility model discloses asynchronous motor efficiency promotes greatly than prior art.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
In the case of no conflict, a person skilled in the art may combine the related technical features in the above examples according to actual situations to achieve corresponding technical effects, and details of various combining situations are not described herein.
It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
The foregoing is illustrative of the preferred embodiments of the present invention, and the present invention is not to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein. Any simple modification, equivalent changes and modifications made to the above embodiments according to the technical spirit of the present invention all fall within the scope of the technical solution of the present invention.

Claims (10)

1. A permanent magnet synchronous motor comprises a shell (1), a stator (2), a rotor (3), a front end cover (4), a rear end cover (5), a front bearing (6), a rear bearing (7) and a rotating shaft (8); the stator (2) is arranged in the shell (1); the rotor (3) is arranged in the stator (2), and the center of the rotor (3) is connected with a rotating shaft (8); a front end cover (4) and a rear end cover (5) are respectively arranged at two ends of the machine shell (1), a front bearing (6) and a rear bearing (7) are respectively arranged at the centers of the front end cover (4) and the rear end cover (5), and the rotating shaft (8) is horizontally connected to the front end cover (4) and the rear end cover (5) through the front bearing (6) and the rear bearing (7); the method is characterized in that: the rotor (3) comprises an iron core and a permanent magnet; the iron core is characterized in that a plurality of groups of strip-shaped through holes which are communicated up and down are arranged on the side wall of the iron core along the axial direction in a circular array mode, and the permanent magnets are embedded in the strip-shaped through holes.
2. A permanent magnet synchronous machine according to claim 1, characterized in that: the winding of the stator (2) adopts a centralized winding with the pitch of 1, and the length of the end part of the winding is not more than 15 mm.
3. A permanent magnet synchronous machine according to claim 1 or 2, characterized in that: the inner side wall of the iron core of the stator (2) is provided with 12 tooth grooves, and the rotor (3) is provided with 10 groups of permanent magnets.
4. A permanent magnet synchronous machine according to claim 1, characterized in that: and the stator sheets and the rotor sheets on the stator (2) and the rotor (3) are both made of cold-rolled silicon steel plate materials with the thickness of 0.35 mm.
5. A permanent magnet synchronous machine according to claim 1, characterized in that: the outer surface of the machine shell (1) is provided with a plurality of radiating grooves (14).
6. A permanent magnet synchronous machine according to claim 1, characterized in that: and two strip-shaped through holes are formed in each group of the plurality of groups of strip-shaped through holes which are communicated up and down.
7. A permanent magnet synchronous machine according to claim 1, characterized in that: the device also comprises a controller; the controller is connected to the rear end cover (5) and electrically connected with the stator (2).
8. A permanent magnet synchronous machine according to claim 7, characterized in that: the controller at least comprises a speed regulator (9), a current distributor (10), two current regulators (11), an inverter (12), a position detection unit (15) and a calculation control unit (13); the calculation control unit (13) is respectively connected with the speed regulator (9) and the position detection unit (15) through electric signals; the current distributor (10) is respectively connected with the speed regulator (9), the current distributor (10) and the calculation control unit (13) through electric signals; the inverter (12) is respectively connected with the two current regulators (11) and the position detection unit (15) through electric signals.
9. A permanent magnet synchronous machine according to claim 8, characterized in that: the position detection unit (15) adopts a rotor position sensor; the rotor position sensor is coaxially and rigidly connected with the rotor (3).
10. A permanent magnet synchronous machine according to claim 8, characterized in that: the calculation control unit (13) at least comprises a signal receiver, a signal transmitter, a torque command filter and a calculation analyzer; the signal receiver is in electric signal connection with the position detection unit (15); the calculation analyzer is respectively connected with the signal receiver and the torque command filter; the signal transmitter is electrically connected with the current distributor (10) and the speed regulator (9).
CN202023312565.3U 2020-12-31 2020-12-31 Permanent magnet synchronous motor Active CN213990462U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202023312565.3U CN213990462U (en) 2020-12-31 2020-12-31 Permanent magnet synchronous motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202023312565.3U CN213990462U (en) 2020-12-31 2020-12-31 Permanent magnet synchronous motor

Publications (1)

Publication Number Publication Date
CN213990462U true CN213990462U (en) 2021-08-17

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ID=77250157

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202023312565.3U Active CN213990462U (en) 2020-12-31 2020-12-31 Permanent magnet synchronous motor

Country Status (1)

Country Link
CN (1) CN213990462U (en)

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