CN210774714U - Outer rotor chassis dynamometer directly driven by permanent magnet synchronous motor - Google Patents
Outer rotor chassis dynamometer directly driven by permanent magnet synchronous motor Download PDFInfo
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- CN210774714U CN210774714U CN201921609773.4U CN201921609773U CN210774714U CN 210774714 U CN210774714 U CN 210774714U CN 201921609773 U CN201921609773 U CN 201921609773U CN 210774714 U CN210774714 U CN 210774714U
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Abstract
The utility model discloses an outer rotor chassis dynamometer machine that PMSM directly drives relates to car and engineering vehicle check out test set technical field, and it is big to have solved dynamometer machine area among the prior art, and mechanical transmission link is many, and is inefficient, the high technical problem of fault incidence. The outer rotor chassis dynamometer directly driven by the permanent magnet synchronous motor comprises a base, a main shaft, an encoder, a torque measurer and a rotating hub, wherein the main shaft is fixedly installed on the base through a bearing unit. The rotating hub is arranged on the main shaft through a first bearing, and the rotating hub is provided with resistance by a permanent magnet synchronous motor. The permanent magnet synchronous motor comprises a stator component and a rotor component; stator module fixed mounting is on the main shaft, and rotor subassembly fixed mounting is on changeing the hub. The utility model discloses rotor subassembly and commentaries on classics hub integration directly drive commentaries on classics hub and rotate, and stator module sets up at the inside and fixed real of motor, and compact structure reduces area, has reduced the mechanical transmission link, has improved efficiency, has also reduced the fault incidence simultaneously.
Description
Technical Field
The utility model relates to an automobile and engineering vehicle check out test set technical field particularly, indicate an outer rotor chassis dynamometer machine that PMSM directly drives.
Background
The chassis dynamometer is an indoor bench test device for testing the performances of dynamic property, multi-working-condition emission indexes, fuel indexes, pure electric endurance mileage and the like of automobiles and engineering vehicles, the chassis dynamometer simulates a road surface through a roller, calculates a road simulation equation and simulates with a loading device, so that the accurate simulation of each working condition of the automobiles and the engineering vehicles is realized, and the chassis dynamometer can be used for loading debugging of the automobiles and the engineering vehicles and diagnosing faults of the vehicles under a load condition; the chassis dynamometer has the advantages of convenient use and reliable performance, and is not influenced by external conditions. On the premise of not disassembling the automobile, the service performance of each system and component of the automobile can be accurately and quickly detected. The chassis dynamometer can be used for both automobile scientific experiments and maintenance detection.
As shown in fig. 5, the conventional dynamometer includes a drum 5 'disposed in the middle of a drum bearing housing 4', and a motor 1 'disposed outside the drum bearing housing 4'. The motor 1' includes a motor stator 111' and a motor rotor 112', the motor stator 111' is fixed, and the motor rotor 112' rotates. The motor rotor 112 'drives the roller 5' to rotate coaxially through the speed reducer 2 'and the coupling 3'. The dynamometer in the prior art has the advantages of large occupied area, more mechanical transmission links, low efficiency and high failure rate, and the speed reducer and the coupler drive the roller to rotate.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at overcoming prior art's not enough, providing an outer rotor chassis dynamometer machine that PMSM directly drives to solve among the prior art dynamometer machine area big, mechanical transmission link is many, and is inefficient, the technical problem that the fault incidence is high.
The utility model provides a technical scheme that its technical problem adopted is:
the outer rotor chassis dynamometer directly driven by the permanent magnet synchronous motor comprises a base, a main shaft, an encoder, a torque measurer and a rotating hub, wherein the main shaft is fixedly arranged on the base through a bearing unit; the rotating hub is arranged on the main shaft through a first bearing, the rotating hub is provided with resistance by a permanent magnet synchronous motor, and the permanent magnet synchronous motor comprises a stator assembly and a rotor assembly; the stator assembly is fixedly arranged on the main shaft and provides a rotating resistance magnetic field for the rotor assembly; the rotor assembly with permanent magnetic characteristics is fixedly arranged on the rotating hub and corresponds to the stator assembly; the torque measurer is used for measuring the reaction force generated by the rotor assembly on the stator assembly when the rotor assembly is subjected to the electromagnetic force generated by the stator assembly, and the encoder is used for measuring the rotating speed and the rotating angle of the rotating hub.
Compared with the prior art, the utility model discloses beneficial effect is: the utility model discloses a set the motor to external rotor and interior stator structure, the rotor subassembly is integrated with changeing the hub, directly drives changeing the hub and rotates, and stator module sets up at the inside and fixed real of motor, and compact structure reduces area, has reduced the mechanical transmission link, has improved efficiency, has also reduced the fault incidence simultaneously. The dynamic response capability is improved because there is no mechanical transmission. And the permanent magnet motor has high control precision relative to the asynchronous motor, the permanent magnet synchronous motor directly provides electromagnetic resistance to the hub, intermediate transmission parts are reduced, the controllability of equipment is improved, the control precision is high, and the accuracy of detection data is enhanced.
Preferably, the permanent magnet synchronous motor is a multi-piece disc type permanent magnet synchronous motor.
The multi-piece disc type motor can improve the reliability of the system, and the use of the whole system cannot be fatally influenced when a small number of pieces of motors are in failure.
Preferably, the torque measuring device includes a rotating portion, a stationary portion, and a pressure sensor; the rotating part is rotatably connected to the stationary part; the pressure sensor is arranged between the rotating part and the static part and used for sensing the torsion of the rotating part relative to the static part when the rotating part rotates; the center of the rotating part is provided with a through hole for the main shaft to pass through, and the rotating part is fixedly arranged on the rotating hub; the stationary part is fixedly mounted on the base.
The torque measurement device structure can be directly connected with the rotating hub through the bolt, the size of equipment is reduced, and a torque transmission mechanism is reduced, so that the response speed of data measurement is higher and more accurate.
Preferably, the rotor assembly comprises a plurality of rotor auxiliary shafts and a plurality of magnetic steel substrates uniformly distributed on the rotor auxiliary shafts along the axial lead of the main shaft, and the rotor auxiliary shafts are fixedly arranged on the rotating hub.
The rotor auxiliary shaft does the magnetic steel substrate provides a template capable of being accurately positioned, so that the magnetic steel substrate is convenient to install, the motor rotor assembly and the rotating hub can be separately processed, the processing difficulty is reduced, the detachable connection mode design is conveniently adopted, and convenience is brought to replacement and maintenance in the later stage.
Preferably, the stator assembly comprises a plurality of stator bases and stator units, the stator bases are fixedly mounted on the spindle along the spindle axis, and the stator units are fixedly mounted on the stator bases.
The stator base does the stator unit provides location mounting platform, can be equipped with the adaptation on the stator unit the recess of stator unit makes things convenient for the location of stator unit, makes the assembling process of equipment more simple and convenient, can also guarantee the installation quality well.
Preferably, the permanent magnet synchronous motor is installed in the rotating hub, a heat insulation layer is arranged on the inner wall of the rotating hub, the main shaft is a hollow shaft and is provided with a water gap, and the water gap comprises a water inlet and a water outlet.
Introduce outside water cooling system, increase the radiating efficiency for the radiating rate of motor can be so that the motor is in during the best operating temperature for a long time, has strengthened the reliability of equipment, has solved the utility model discloses heat dissipation problem when high-power application. The taken heat is directly discharged to the outside of the environmental bin, and the influence on the temperature of the environmental bin is also avoided. The insulating layer is effectively isolated with the temperature and the environment storehouse of place motor, prevents that the temperature that the motor operation in-process produced from producing the experimental temperature in environment storehouse from influencing.
Preferably, a water path is arranged inside the stator base and is respectively communicated with the water inlet and the water outlet.
Preferably, the stator unit comprises a plurality of stator modules in a disc structure; and the single stator module comprises a stator core and a stator winding wound on the stator core.
The modularized design breaks through the whole manufacturing process of the traditional stator core, the radius of the stator core is reduced, the principle is that the stator core is divided into a plurality of stator units which can be independently controlled, under the condition that an encoder accurately reads the relative position of a rotor and a stator, each single stator unit generates a specific magnetic field under the action of a controller, electromagnetic forces in the same rotating direction are generated on a single magnetic steel substrate passing through the magnetic field of the stator unit, the specific magnetic fields and the electromagnetic forces are combined together to form a rotating electromagnetic force, and then analog resistance or inertia quantity is provided for a rotating hub; during the restoration, only need change single stator module, compare traditional motor stator, in case damage, equipment stop operation immediately, unable normal work, and need change whole stator during the restoration.
Preferably, the stator bases are disc structures, and the stator modules are distributed on the respective stator bases.
Preferably, the encoder includes a code wheel and an inductive element for inducing the code wheel, the code wheel is mounted on the torque measurer or the stator assembly, and the inductive element is mounted on the rotary hub and corresponds to the code wheel.
The speed and the rotation angle of the main shaft are effectively read by utilizing the encoder of the permanent magnet synchronous motor, the utilization rate of components is improved, and the cost is saved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, 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 present invention in example 1;
FIG. 2 is a schematic view of the present invention in example 2;
FIG. 3 is a schematic view of the present invention in example 3;
figure 4 is a side view of the invention in example 3;
FIG. 5 is a schematic diagram of a prior art dynamometer.
In the figure: 1-base, 111-base plate, 112-support column, 2-bearing unit, 21-bearing seat, 22-second bearing, 3-main shaft, 4-encoder, 41-inductive element, 42-code wheel, 5-first bearing, 6-rotating hub, 7-rotor assembly, 71, rotor auxiliary shaft, 72-magnetic steel substrate, 73-magnetic steel, 8-stator assembly, 81-stator unit, 82-stator base, 9-thermal insulation layer, 10-lead port, 11-key, 12-water port, 121-water inlet, 122-water outlet, 13-torque measuring device, 131-rotating part, 132-pressure sensor, 133-stationary part, 411-measuring wheel, 422-encoder unit, 433-encoder mounting seat, 1311-knuckle bearing, 1322-pull pressure sensor, 1333-mounting seat, 1344-torque support, 14-support key, 1' -motor, 111' -motor stator, 112' -motor rotor, 2' -speed reducer, 3' coupler, 4' -roller bearing seat, 5' -roller.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. It is to be understood that the embodiments described are merely exemplary of the invention and are not intended to be exhaustive. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Example 1:
as shown in fig. 1, the outer rotor chassis dynamometer directly driven by the permanent magnet synchronous motor includes a base 1, a bearing unit 2, a main shaft 3, an encoder 4, a first bearing 5, a rotating hub 6 and a torque measurer 13. The base 1 includes a bottom plate 111 and support pillars 112 disposed on both sides of the bottom plate 111. The main shaft 3 is fixedly installed between the support columns 112 through the bearing unit 2. The bearing unit 2 includes a bearing housing 21 and a second bearing 22. The rotary hub 6 is mounted on the main shaft 3 through a first bearing 5, and the rotary hub 6 is provided with electromagnetic resistance by a permanent magnet synchronous motor to simulate mechanical inertia. The permanent magnet synchronous motor comprises a rotor assembly 7 and a stator assembly 8. The stator assembly 8 is fixedly mounted on the main shaft 3 and provides a rotating drag magnetic field for the rotor assembly 7. A rotor assembly 7 having permanent magnetic properties is fixedly mounted on the rotating hub 6, corresponding to the stator assembly 8. The torque measuring device 13 measures a reaction force generated in the stator assembly 8 when the hub 6 and the rotor assembly 7 receive the electromagnetic force generated by the stator assembly 8, and the encoder 4 measures the rotation speed and the rotation angle of the hub 6. The main shaft 3 is provided with a lead wire port 10, and a lead wire of the motor passes through the shaft hole and is connected to the stator assembly 8 through the lead wire port 10. The lead wires of each motor are respectively led out and connected to the frequency converter in parallel, and the electric angle of each motor is adjusted when the frequency converter is installed, so that the requirement of parallel operation of a plurality of motors is met, and the reliability of the motors is improved.
Preferably, the torque measuring device 13 includes a rotating portion 131, a stationary portion 133, and a pressure sensor 132. The rotating portion 131 is rotatably connected to the stationary portion 133 via a pressure sensor 132. The pressure sensor 132 is disposed between the rotating portion 131 and the stationary portion 133, and is used for sensing a torque force of the rotating portion 131 relative to the stationary portion 133 when rotating. The rotating portion 131 is fixedly attached to the hub 6, and the stationary portion 133 is fixedly attached to the bearing unit 2. The rotor assembly 7 comprises a magnetic steel substrate 72, magnetic steel 73 and a plurality of rotor auxiliary shafts 71 which are uniformly distributed on the magnetic steel substrate around the axial lead of the main shaft 3. The rotor auxiliary shaft 71 is uniformly and fixedly arranged on the rotating hub 6 around the axial lead of the main shaft 3, and the magnetic steel substrate is fixedly arranged on the main shaft 3 through a key 11. Stator assembly 8 includes stator base 82 and stator unit 81, and stator base 82 is fixed mounting on main shaft 3, and stator unit 81 is fixed mounting on stator base 82. Further, the stator unit 81 includes a plurality of stator modules in a disc structure, and each stator module includes a stator core and a stator winding wound on the stator core. The stator base 82 is disc-shaped, and the stator assembly 8 and the rotor assembly 7 are mutually crossed and uniformly distributed at intervals along the axial lead of the main shaft 3. The permanent magnet synchronous motor is installed in the rotary hub 6, a heat insulation layer 9 is arranged on the inner wall of the rotary hub 6, a water gap 12 is formed in the main shaft 3, the water gap 12 comprises a water inlet 121 and a water outlet 122, and the water inlet 121 is connected with an external cold water system. Stator base 82 is as the water-cooling dish, when guaranteeing intensity, is provided with the water route in stator base 82 inside, and the water route communicates with water inlet 121 and delivery port 122 respectively. The encoder 4 includes a code wheel 42 and a sensing element 41 for sensing the code wheel 42, the code wheel 42 is mounted on the hub 6, and the sensing element 41 is mounted on the bearing unit 2 to correspond to the code wheel 42.
When the vehicle running resistance simulator works, a vehicle tire is in contact with the rotating hub 6, the rotating hub 6 is driven by the tire of the started vehicle to rotate, and at the moment, the rotating hub 6 adopts a full-electric inertia simulation technology to automatically simulate the resistance of the vehicle in the road running process under the action of the electromagnetic force of the stator assembly 8 and the rotor assembly 7 of the permanent magnet synchronous motor, so that the measurement of each parameter of the vehicle running process is realized. The encoder 4 is used for detecting the rotating speed and the rotating angle of the rotating hub 6, the stator assembly 8 generates force on the rotor assembly 7 fixed on the rotating hub 6, and meanwhile, the rotor assembly 7 also generates reaction force on the stator assembly 8 due to the fact that the force is mutual, and the reaction force is transmitted to the torque measurer 13 to be measured.
Example 2:
as shown in fig. 2, the outer rotor chassis dynamometer directly driven by the permanent magnet synchronous motor includes a base 1, a bearing unit 2, a main shaft 3, an encoder 4, a first bearing 5, a rotating hub 6 and a torque measurer 13. The base 1 includes a bottom plate 111 and support pillars 112 disposed on both sides of the bottom plate 111. The main shaft 3 is fixedly installed between the support columns 112 through the bearing unit 2. The bearing unit 2 includes a bearing housing 21 and a second bearing 22. The rotary hub 6 is mounted on the main shaft 3 through a first bearing 5, and the rotary hub 6 is provided with electromagnetic resistance by a permanent magnet synchronous motor to simulate mechanical inertia. The permanent magnet synchronous motor comprises a rotor assembly 7 and a stator assembly 8. The stator assembly 8 is fixedly mounted on the main shaft 3 and provides a rotating drag magnetic field for the rotor assembly 7. A rotor assembly 7 having permanent magnetic properties is fixedly mounted on the rotating hub 6, corresponding to the stator assembly 8. The torque measuring device 13 measures a reaction force generated in the stator assembly 8 when the rotor hub 6 and the rotor assembly 7 receive the electromagnetic force generated by the stator assembly 8. The encoder 4 is used to measure the rotational speed and rotational angle of the hub 6. The main shaft 3 is provided with a lead wire port 10, and a lead wire of the motor passes through the shaft hole and is connected to the stator assembly 8 through the lead wire port 10. The lead wires of each motor are respectively led out and connected to the frequency converter in parallel, and the electric angle of each motor is adjusted when the frequency converter is installed, so that the requirement of parallel operation of a plurality of motors is met, and the reliability of the motors is improved.
Preferably, the torque measuring device 13 includes a rotating portion 131, a stationary portion 133, and a pressure sensor 132. The rotating portion 131 is rotatably connected to the stationary portion 133 through a pressure sensor 132, and the pressure sensor 132 is disposed between the rotating portion 131 and the stationary portion 133 for sensing a torque force of the rotating portion 131 relative to the stationary portion 133 when the rotating portion 133 rotates. The rotary part 131 is fixedly mounted on the rotary hub 6; the stationary portion 133 is fixedly attached to the bearing unit 2. The rotor assembly 7 comprises a magnetic steel substrate 72, magnetic steel 73 and a plurality of rotor auxiliary shafts 71 which are uniformly distributed on the magnetic steel substrate around the axial lead of the main shaft 3, the rotor auxiliary shafts 71 are uniformly and fixedly arranged on the rotating hub 6 around the axial lead of the main shaft 3, and the magnetic steel substrate is fixedly arranged on the main shaft 3 through keys 11. Stator assembly 8 includes stator base 82 and stator unit 81, and stator base 82 is fixed mounting on main shaft 3, and stator unit 81 is fixed mounting on stator base 82. Further, the stator unit 81 includes a plurality of stator modules in a disc structure, and each stator module includes a stator core and a stator winding wound on the stator core. The stator base 82 is disc-shaped, and the stator assembly 8 and the rotor assembly 7 are mutually crossed and uniformly distributed at intervals along the axial lead of the main shaft 3. The permanent magnet synchronous motor is arranged in the rotating hub 6, and a heat insulation layer 9 is arranged on the inner wall of the rotating hub 6. The main shaft 3 is provided with a water inlet 12, the water inlet 12 comprises a water inlet 121 and a water outlet 122, and the water inlet 121 is connected with an external cold water system. Stator base 82 is as the water-cooling dish, when guaranteeing intensity, is provided with the water route in stator base 82 inside, and the water route communicates with water inlet 121 and delivery port 122 respectively. The encoder 4 comprises a measuring wheel 411, an encoder unit 422 and an encoder mounting seat 433 arranged on the bearing unit 2, the measuring wheel 411 is in friction contact with the rotating hub 6, and the encoder unit 422 is arranged on the encoder mounting seat 43.
During operation, the vehicle tire contacts with rotary hub 6, the tire of vehicle drives rotary hub 6 rotatory after the start, and at this moment, rotary hub 6 is under permanent magnet synchronous machine's stator module 8 and rotor subassembly 7's electromagnetic force effect, adopt full electric inertia analog technology automatic simulation vehicle resistance at the road travel in-process, and then realize the measurement to each parameter of vehicle travel process, encoder 4 is used for detecting rotary hub 6's rotational speed and corner, when stator module 8 produced power to rotor subassembly 7 fixed on rotary hub 6, because power is mutual, rotor subassembly 7 also can produce a reaction force to stator module 8, this reaction force transmits for torque measurement ware 13 and records data.
Example 3:
as shown in fig. 3 and 4, the outer rotor chassis dynamometer directly driven by the permanent magnet synchronous motor includes a base 1, a bearing unit 2, a spindle 3, an encoder 4, a first bearing 5, a rotating hub 6 and a torque measurer 13. The base 1 includes a bottom plate 111 and support pillars 112 disposed on both sides of the bottom plate 111. The main shaft 3 is fixedly installed between the support columns 112 through the bearing unit 2. The bearing unit 2 includes a bearing housing 21 and a second bearing 22. The rotary hub 6 is mounted on the main shaft 3 through a first bearing 5, and the rotary hub 6 is provided with electromagnetic resistance by a permanent magnet synchronous motor to simulate mechanical inertia. The permanent magnet synchronous motor comprises a rotor assembly 7 and a stator assembly 8. The stator assembly 8 is fixedly mounted on the main shaft 3 and provides a rotating drag magnetic field for the rotor assembly 7. A rotor assembly 7 having permanent magnetic properties is fixedly mounted on the rotating hub 6, corresponding to the stator assembly 8. The torque measuring device 13 measures a reaction force generated in the stator assembly 8 when the rotor hub 6 and the rotor assembly 7 receive the electromagnetic force generated by the stator assembly 8. The encoder 4 is used to measure the rotational speed and rotational angle of the hub 6. The main shaft 3 is provided with a lead wire port 10, and a lead wire of the motor passes through the shaft hole and is connected to the stator assembly 8 through the lead wire port 10. The lead wires of each motor are respectively led out and connected to the frequency converter in parallel, and the electric angle of each motor is adjusted when the frequency converter is installed, so that the requirement of parallel operation of a plurality of motors is met, and the reliability of the motors is improved.
Preferably, the torque measurer 13 includes a joint bearing 1311, a tension and pressure sensor 1322, a mounting seat 1333, and a torque bracket 1344. The two ends of the pull pressure sensor 1322 are respectively connected with the mounting seat 1333 and the torque support 1344 through a joint bearing 1311, and are used for sensing the pull pressure relative to the mounting seat 1333 when the torque support 1344 rotates. The torque bracket 1344 is fixedly mounted to the hub 6 by a torque key 14; the mounting 1333 is fixedly mounted on the support post 112. The rotor assembly 7 comprises a magnetic steel substrate 72, magnetic steel 73 and a plurality of rotor auxiliary shafts 71 which are uniformly distributed on the magnetic steel substrate around the axial lead of the main shaft 3. The rotor auxiliary shaft 71 is uniformly and fixedly arranged on the rotating hub 6 around the axial lead of the main shaft 3, and the magnetic steel substrate is fixedly arranged on the main shaft 3 through a key 11. Stator assembly 8 includes stator base 82 and stator unit 81, and stator base 82 is fixed mounting on main shaft 3, and stator unit 81 is fixed mounting on stator base 82. Furthermore, the stator unit comprises a plurality of stator modules in a disc structure, and each stator module comprises a stator core and a stator winding wound on the stator core. The stator base 82 is disc-shaped, and the stator assembly and the rotor assembly 7 are mutually crossed and uniformly distributed at intervals along the axial lead of the main shaft 3. The permanent magnet synchronous motor is installed in the rotary hub 6, a heat insulation layer 9 is arranged on the inner wall of the rotary hub 6, a water gap 12 is formed in the main shaft 3, the water gap 12 comprises a water inlet 121 and a water outlet 122, and the water inlet 121 is connected with an external cold water system. Stator base 82 is as the water-cooling dish, when guaranteeing intensity, is provided with the water route in stator base 82 inside, and the water route communicates with water inlet 121 and delivery port 122 respectively. The encoder 4 includes a code wheel 42 and a sensing element 41 for sensing the code wheel 42, the code wheel 42 is mounted on the hub 6, and the sensing element 41 is mounted on the bearing unit 2 to correspond to the code wheel 42.
During operation, the vehicle tire contacts with rotary hub 6, the tire of vehicle drives rotary hub 6 rotatory after the start, and at this moment, rotary hub 6 is under permanent magnet synchronous machine's stator module 8 and rotor subassembly 7's electromagnetic force effect, adopt full electric inertia analog technology automatic simulation vehicle resistance at the road travel in-process, and then realize the measurement to each parameter of vehicle travel process, encoder 4 is used for detecting rotary hub 6's rotational speed and corner, when stator module 8 produced power to rotor subassembly 7 fixed on rotary hub 6, because power is mutual, rotor subassembly 7 also can produce a reaction force to stator module 8, this reaction force transmits for torque measurement ware 13 and records data.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention.
Claims (8)
1. The outer rotor chassis dynamometer directly driven by the permanent magnet synchronous motor is characterized by comprising a base (1), a main shaft (3), an encoder (4), a torque measurer (13) and a rotating hub (6), wherein the main shaft (3) is fixedly installed on the base (1) through a bearing unit (2); the rotating hub (6) is mounted on the main shaft (3) through a first bearing (5), the rotating hub (6) is provided with resistance by a permanent magnet synchronous motor, and the permanent magnet synchronous motor comprises a stator assembly (8) and a rotor assembly (7); the stator assembly (8) is fixedly arranged on the main shaft (3) and provides a rotating resistance magnetic field for the rotor assembly (7); the rotor assembly (7) with permanent magnetic property is fixedly arranged on the rotating hub (6) and corresponds to the stator assembly (8); the torque measurer (13) is used for measuring the reaction force of the rotor assembly (7) on the stator assembly (8) when the rotor assembly (7) is subjected to the electromagnetic force generated by the stator assembly (8), and the encoder (4) is used for measuring the rotating speed and the rotating angle of the rotating hub (6);
the permanent magnet synchronous motor is a multi-sheet disc type permanent magnet synchronous motor;
the torque measuring device (13) includes a rotating portion (131), a stationary portion (133), and a pressure sensor (132); the rotating part (131) is rotatably connected to the stationary part (133); the pressure sensor (132) is arranged between the rotating part (131) and the static part (133) and is used for sensing the torsion of the rotating part (131) relative to the static part (133) when rotating; a through hole for the main shaft (3) to pass through is formed in the center of the rotating part (131), and the rotating part (131) is fixedly installed on the rotating hub (6); the static part (133) is fixedly arranged on the base (1).
2. The outer rotor chassis dynamometer directly driven by a permanent magnet synchronous motor according to claim 1, wherein the rotor assembly (7) comprises a plurality of rotor auxiliary shafts (71) and a plurality of magnetic steel (73) base plates (72) which are uniformly distributed on the rotor auxiliary shafts (71) along the axial lead of the main shaft (3), and the rotor auxiliary shafts (71) are fixedly mounted on the rotating hub (6).
3. The outer rotor chassis dynamometer directly driven by a permanent magnet synchronous motor according to claim 2, wherein the stator assembly (8) comprises a plurality of stator bases (82) and stator units (81), the stator bases (82) are fixedly mounted on the spindle (3) along the axial lead of the spindle (3), and the stator units (81) are fixedly mounted on the stator bases (82).
4. The outer rotor chassis dynamometer machine directly driven by a permanent magnet synchronous motor according to claim 3, wherein the permanent magnet synchronous motor is installed in a rotating hub (6), a heat insulation layer (9) is arranged on the inner wall of the rotating hub (6), the main shaft (3) is a hollow shaft and is provided with a water gap (12), and the water gap (12) comprises a water inlet (121) and a water outlet (122).
5. The outer rotor chassis dynamometer machine directly driven by a permanent magnet synchronous motor according to claim 4, wherein a water channel is arranged inside the stator base (82), and the water channel is communicated with the water inlet (121) and the water outlet (122) respectively.
6. The outer rotor chassis dynamometer machine direct-driven by a permanent magnet synchronous motor according to claim 3, wherein the stator unit (81) comprises a plurality of stator modules in a disc structure; and the single stator module comprises a stator core and a stator winding wound on the stator core.
7. The outer rotor chassis dynamometer machine driven by a permanent magnet synchronous motor directly according to claim 6, wherein the stator bases (82) are in a disc structure, and the stator modules are distributed on the respective stator bases (82).
8. The outer rotor chassis dynamometer directly driven by permanent magnet synchronous motor according to claim 1, wherein the encoder (4) comprises a code wheel (42) and an induction element (41) inducing the code wheel (42), the code wheel (42) is installed on the torque measurer (13) or the stator assembly (8), and the induction element (41) is installed on the rotating hub (6) and corresponds to the code wheel (42).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921609773.4U CN210774714U (en) | 2019-09-25 | 2019-09-25 | Outer rotor chassis dynamometer directly driven by permanent magnet synchronous motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921609773.4U CN210774714U (en) | 2019-09-25 | 2019-09-25 | Outer rotor chassis dynamometer directly driven by permanent magnet synchronous motor |
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| Publication Number | Publication Date |
|---|---|
| CN210774714U true CN210774714U (en) | 2020-06-16 |
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| CN201921609773.4U Active CN210774714U (en) | 2019-09-25 | 2019-09-25 | Outer rotor chassis dynamometer directly driven by permanent magnet synchronous motor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110501170A (en) * | 2019-09-25 | 2019-11-26 | 洛阳合能电气有限公司 | A kind of outer rotor chassis dynamometer that permanent magnet synchronous motor directly drives |
| CN113447738A (en) * | 2021-06-15 | 2021-09-28 | 安徽精科检测技术有限公司 | Movable rotary hub system for automobile electromagnetic compatibility test |
-
2019
- 2019-09-25 CN CN201921609773.4U patent/CN210774714U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110501170A (en) * | 2019-09-25 | 2019-11-26 | 洛阳合能电气有限公司 | A kind of outer rotor chassis dynamometer that permanent magnet synchronous motor directly drives |
| CN113447738A (en) * | 2021-06-15 | 2021-09-28 | 安徽精科检测技术有限公司 | Movable rotary hub system for automobile electromagnetic compatibility test |
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