CN108663149B - Inner rotor chassis dynamometer directly driven by permanent magnet synchronous motor - Google Patents
Inner rotor chassis dynamometer directly driven by permanent magnet synchronous motor Download PDFInfo
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- CN108663149B CN108663149B CN201810735512.0A CN201810735512A CN108663149B CN 108663149 B CN108663149 B CN 108663149B CN 201810735512 A CN201810735512 A CN 201810735512A CN 108663149 B CN108663149 B CN 108663149B
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
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- 230000017525 heat dissipation Effects 0.000 abstract description 4
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
- G01L3/24—Devices for determining the value of power, e.g. by measuring and simultaneously multiplying the values of torque and revolutions per unit of time, by multiplying the values of tractive or propulsive force and velocity
- G01L3/242—Devices for determining the value of power, e.g. by measuring and simultaneously multiplying the values of torque and revolutions per unit of time, by multiplying the values of tractive or propulsive force and velocity by measuring and simultaneously multiplying torque and velocity
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Abstract
The invention discloses an inner rotor chassis dynamometer directly driven by a permanent magnet synchronous motor, which comprises a base, a main shaft, an encoder, a torque measurer and a hub, wherein the main shaft is fixedly arranged on the base through a bearing; the hub is fixed on the main shaft, and the main shaft is provided with resistance by a permanent magnet synchronous motor; the torque measurer is used for measuring the reaction force generated by the rotor assembly to the stator assembly when the rotor assembly is subjected to electromagnetic force generated by the stator assembly, and the encoder is used for measuring the rotating speed and the rotating angle of the main shaft. The chassis dynamometer provided by the invention has the advantages of compact structure, low processing difficulty, high control precision, reliable detection data, good heat dissipation effect and particular suitability for high-power and high-torque chassis dynamometers.
Description
Technical Field
The invention relates to the technical field of automobile detection equipment, in particular to an inner rotor chassis dynamometer directly driven by a permanent magnet synchronous motor.
Background
The chassis dynamometer is indoor bench test equipment for testing the performances of automobile dynamic performance, multi-working-condition emission indexes, fuel indexes and the like, the automobile chassis dynamometer simulates a road surface through a roller, calculates a road simulation equation, simulates by a loading device, realizes accurate simulation of various working conditions of the automobile, can be used for loading and debugging the automobile, and diagnoses faults of the automobile under the loading condition; the chassis dynamometer is convenient to use and reliable in performance and is not influenced by external conditions. On the premise of not disassembling the automobile, the service performance of each system and each component of the automobile can be accurately and rapidly detected. The chassis dynamometer can be used for automobile science experiments and also can be used for maintenance and detection.
The current motor type chassis dynamometer has two basic structures: the device is formed by coaxially connecting three parts of a dynamometer, a rotary drum and a variable combined flywheel set, wherein the dynamometer provides resistance to a driving wheel of a vehicle through the rotary drum, absorbs mechanical work generated by running of the wheels, and simultaneously measures the rotating speed of the rotary drum and torque acting on the rotary drum. In the detection work, the inertia of the flywheel group including the inertia of the motor and the rotary drum provides the inertia force during variable speed operation, and different flywheel combinations are used for adapting to vehicle types with different inertia. The other structure is to remove the flywheel group, and replace the mechanical inertia of the flywheel group by using equivalent electric simulation inertia generated by the dynamometer to replace the inertia force of the mechanical flywheel group.
Chinese patent (application number: CN00226144.8; publication date: 2000.12.27) discloses a chassis dynamometer, which comprises a constant-speed resistance, compensation inertial force and mechanical loss setter with calculation and storage functions, and is realized by integrating a motor and a rotary drum. The rotor of the asynchronous motor as a dynamometer is fixed in a rotary drum, the stator is fixed on a main shaft, a force sensor is arranged between a force arm on the main shaft and a machine base, and the resistance provided by the motor to the rotary drum is measured through the force sensor. The air guiding plates are arranged on the end covers at the two sides of the rotary drum, cooling air is introduced by utilizing the rotation of the rotary drum, and a cooling fan is not additionally arranged. The chassis dynamometer has the advantages of compact structure, low manufacturing and installation cost and small occupied area, is particularly suitable for vehicles with single driving wheels or multiple driving wheels which are coaxial and have small wheel track, but cannot adapt to detection of high-load and high-power special vehicles, and is characterized in that: 1. the motor stator component of the dynamometer is arranged in the inner cavity of the hub to form a closed space, and the motor generates huge heat when a heavy vehicle with high power and low rotation speed detects a room, and the motor cannot dissipate heat and cool due to the fact that the rotation speed is low by virtue of the cooling fins on the hub, so that the performance of the motor is greatly influenced; 2. the asynchronous motor belongs to an induction motor, and the full-electric inertia control precision is poor; 3. the detection of the special high-load and high-power vehicle requires a large torque load, a large-radius motor stator is required, and the large-radius motor stator is difficult to process and has high cost; 4. the hub is arranged on the main shaft through a bearing, and torque measurement of the main shaft can be influenced in the rotating process of the hub, so that accuracy of test data is influenced; 5. detecting the environment in the vehicle cabin, the emitted heat will have an effect on the temperature of the cabin.
Disclosure of Invention
The invention aims to provide the chassis dynamometer which has the advantages of compact structure, low processing difficulty, high control precision, reliable detection data, good heat dissipation effect and particular suitability for high power and high torque.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the inner rotor chassis dynamometer directly driven by the permanent magnet synchronous motor comprises a base, a main shaft, an encoder, a torque measurer and a hub, wherein the main shaft is fixedly arranged on the base through a bearing; the hub is fixed on the main shaft, the main shaft 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 torque measurer and provides a rotating resistance magnetic field for the rotor assembly; the rotor component with the permanent magnetic property is fixedly arranged on the main shaft and corresponds to the stator component; the torque measurer is used for measuring the reaction force generated by the rotor assembly to the stator assembly when the rotor assembly is subjected to electromagnetic force generated by the stator assembly, and the encoder is used for measuring the rotating speed and the rotating angle of the main shaft.
Preferably, the torque measurer includes a rotating part, a stationary part, 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 is used for sensing 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 spindle to pass through, and the stator assembly is fixedly arranged on the rotating part; the static part is fixedly arranged on the base; the torque measurer has the beneficial effects that the torque measurer structure after special optimization can be directly connected with the stator assembly through bolts, the volume of equipment is reduced, the torque transmission mechanism is reduced, and the response speed of data measurement is faster and more accurate.
Preferably, the rotor assembly comprises a rotor base and a plurality of magnetic steel substrates uniformly distributed on the rotor base around the axis of the main shaft, and the rotor base is fixedly arranged on the main shaft; the beneficial effects are that: the rotor base is used for basically providing a template capable of being accurately positioned for the magnetic steel, so that the magnetic steel substrate is convenient to install, the motor rotor assembly and the main shaft can be separately machined, machining difficulty is reduced, detachable connection mode design is convenient to use, and later replacement and maintenance are convenient.
Preferably, the stator assembly comprises a stator base and a stator unit, wherein the stator base is fixedly arranged on the main shaft, and the stator unit is fixedly arranged on the stator base; the beneficial effects are that: the stator base is used for providing a positioning and mounting platform for the stator unit, and the stator unit can be provided with a groove adapted to the stator unit, so that the stator unit can be positioned conveniently, the assembly process of the device is simpler and more convenient, and the mounting quality can be guaranteed well.
Preferably, the stator unit is composed of a plurality of stator modules in a fan-shaped structure; the stator module comprises a stator iron core and a stator winding wound on the stator iron core; the stator core is divided into a plurality of independently controllable stator modules, each single stator module generates a specific magnetic field under the action of the controller under the condition that the encoder accurately reads the relative position of the rotor and the stator, electromagnetic forces in the same rotation direction are generated for a single magnetic steel substrate passing through the magnetic field, the electromagnetic forces are combined together to form a rotating electromagnetic force, and then analog resistance or inertia quantity is provided for rotating a hub; when repairing, only a single stator module needs to be replaced, compared with a traditional motor stator, once the motor stator is damaged, the equipment immediately stops running and cannot work normally, and the whole stator needs to be replaced during repairing.
Preferably, the stator base is of an annular cap structure, and the stator modules are uniformly distributed on the inner wall of the stator base around the axial lead of the stator base.
Preferably, the tail end of the stator base is in an open structure; the permanent magnet synchronous motor is covered by the protective cover, and the protective cover sleeved on the stator base is fixed on the base, and has the beneficial effects that: the contact area between the stator assembly and the outside is increased, so that air can flow conveniently, and the heat dissipation efficiency is improved; the heat insulation layer effectively isolates the temperature of the motor from the environment bin, and prevents the temperature generated in the operation process of the motor from influencing the temperature of the environment bin test.
Preferably, the protective cover is provided with an air inlet and an air outlet, and the inner wall of the protective cover is provided with a heat insulation layer; the air inlet is connected with an external cold air system; the beneficial effects are that: the external cold air system is introduced, so that the heat dissipation speed of the motor is accelerated, the motor can be in the optimal working temperature for a long time, the reliability of equipment is enhanced, the taken heat is directly discharged out of the environmental bin, and the influence on the temperature of the environmental bin is avoided.
Preferably, the encoder comprises a code disc and an induction element for inducing the code disc, wherein the code disc is arranged on a main shaft or a rotor assembly, and the induction element is arranged on the torque measurer or a stator assembly and corresponds to the code disc; the beneficial effects are that: the encoder of the permanent magnet synchronous motor is effectively utilized to read the rotating speed and the rotating angle of the main shaft, the utilization rate of components is improved, and the cost is saved.
Compared with the prior art, the invention has the beneficial effects that 1, when the hub is used for testing the vehicle, the permanent magnet synchronous motor directly provides electromagnetic resistance for the main shaft, thereby reducing intermediate transmission parts, improving the controllability of the equipment, having high control precision and enhancing the accuracy of detection data; 2. the motor adopts a modularized design, so that the processing difficulty of a motor stator is reduced, the production cost is saved, and particularly, when a large-radius stator assembly is produced; 3. the design of the protective cover is used for thermally isolating the motor from the environmental bin and preventing the heat generated by the motor during working from influencing the environmental bin besides the protective effect on the motor; 4. the torque measurer with unique design is skillfully combined with the motor stator assembly, so that the occupied space of equipment is reduced, and the structure of the equipment is more compact.
Drawings
Fig. 1 is a schematic structural diagram of an inner rotor chassis dynamometer directly driven by a permanent magnet synchronous motor according to a first embodiment;
fig. 2 is a schematic structural diagram of a local part of an inner rotor chassis dynamometer directly driven by a permanent magnet synchronous motor in the first embodiment;
FIG. 3 is a schematic diagram of the torque measurer;
FIG. 4 is a schematic diagram of a rotor assembly and a stator assembly according to the first embodiment;
FIG. 5 is a schematic view of the structure of the protective cover;
fig. 6 is a schematic structural diagram of an inner rotor chassis dynamometer directly driven by a permanent magnet synchronous motor in the second embodiment;
fig. 7 is a schematic structural diagram of a local part of an inner rotor chassis dynamometer directly driven by a permanent magnet synchronous motor in the second embodiment;
FIG. 8 is a schematic structural view of a stator assembly according to a second embodiment;
fig. 9 is a schematic structural diagram of an inner rotor chassis dynamometer directly driven by a permanent magnet synchronous motor in the third embodiment;
fig. 10 is a schematic structural diagram of a local part of an inner rotor chassis dynamometer directly driven by a permanent magnet synchronous motor in the third embodiment;
in the figure: 1. a base; 11. a bottom plate; 12. a support column; 2. a main shaft; 3. a bearing; 4. an encoder; 41. an inductive element; 42. a code wheel; 5. a protective cover; 51. an air inlet; 52. an air outlet; 53. a thermal insulation layer; 6. a stator assembly; 61. a stator base; 62. a stator unit; 62-1, stator module; 7. a key; 8. a rotor assembly; 81. a rotor base; 82. a magnetic steel substrate; 9. a torque measurer; 91. a stationary part; 92. a pressure sensor; 93. a rotating part; 93-1, spigot; 93-2, through holes; 10. rotating the grain.
Detailed Description
The following description of the embodiments of the present invention will be made more apparent and fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by one of ordinary skill in the art without undue burden on the person of ordinary skill in the art based on embodiments of the present invention, are within the scope of the present invention.
Example 1
As shown in fig. 1-5, an inner rotor chassis dynamometer directly driven by a permanent magnet synchronous motor comprises a base 1, a main shaft 2, an encoder 4, a torque measurer 9 and a hub 10, wherein the base 1 comprises a bottom plate 11 and support columns 12 arranged on two sides of the bottom plate 11; the main shaft 2 is fixedly arranged between the support columns 12 through bearings 3; the hub 10 is fixed on the main shaft 2, the main shaft 2 is provided with electromagnetic resistance by a permanent magnet synchronous motor to simulate mechanical inertia, and the permanent magnet synchronous motor comprises a stator assembly 6 and a rotor assembly 8; the stator assembly 6 is fixedly arranged on the torque measurer 9 and provides a rotating resistance magnetic field for the rotor assembly; the rotor assembly 8 with permanent magnetic property is fixedly arranged on the main shaft 2 and corresponds to the stator assembly 6; the torque measurer 9 is used for measuring a reaction force generated by the rotor assembly 8 to the stator assembly 6 when the rotor assembly 8 receives electromagnetic force generated by the stator assembly 6, and the encoder 4 is used for measuring the rotating speed and the rotating angle of the main shaft 2.
Preferably, the torque measurer 9 includes a rotating part 93, a stationary part 91, and a pressure sensor 92; the rotating portion 93 is rotatably connected to the stationary portion 91 through a bearing; the pressure sensor 92 is disposed between the rotating portion 93 and the stationary portion 91, and is configured to sense a torque force of the rotating portion 93 relative to the stationary portion 91 when the rotating portion rotates; the center of the rotating part 93 is provided with a through hole 93-2 for the spindle 2 to pass through, the stator assembly 6 is fixedly arranged on the rotating part 93, and the rotating part 93 is provided with a spigot 93-1 for positioning the stator assembly 6; the stationary part 91 is fixedly mounted on the support column 12; the rotor assembly 8 comprises a rotor base 81 and a plurality of magnetic steel substrates 82 which are uniformly distributed on the rotor base 81 around the axial lead of the main shaft 2, and the rotor base 81 is fixedly arranged on the main shaft 2 through a key 7; the stator assembly 6 includes a stator base 61 and a stator unit 62, the stator base 61 is fixedly mounted on the rotating portion 93, and the stator unit 62 is fixedly mounted on the stator base 61; further, the stator unit 62 is composed of a plurality of stator modules 62-1 having a sector-shaped ring structure; the stator module 62-1 includes a stator core and a stator winding wound around the stator core; the stator base 61 is in an annular cap structure, and the stator modules 62-1 are uniformly distributed on the circumferential inner wall of the stator base 61 around the axial lead of the stator base 61; further, the tail end of the stator base 61 is in an open structure; the permanent magnet synchronous motor is covered by a protective cover 5, and the protective cover 5 sleeved on the stator base 61 is fixed on the support column 12; the protective cover 5 is provided with an air inlet 51 and an air outlet 52, and the inner wall is provided with a heat insulation layer 53; the air inlet 51 is connected with an external cold air system; the encoder 4 includes a code wheel 42 and an induction element 41 for inducing the code wheel 42, the code wheel 42 is mounted on a spindle, and the induction element 41 is mounted on the stator base 61 to correspond to the code wheel 42.
When the intelligent steering wheel is in operation, the tire of the vehicle is in contact with the steering wheel 10, the tire of the vehicle drives the steering wheel 10 to rotate after the vehicle is started, at the moment, the steering wheel 10 automatically simulates the resistance of the vehicle in the road running process by adopting the full-electric inertia simulation technology under the electromagnetic force action of the stator assembly 6 and the rotor assembly 8 of the permanent magnet synchronous motor, so that the measurement of various parameters in the vehicle running process is realized, the encoder 4 is used for detecting the rotating speed and the rotating angle of the main shaft 2, and the stator assembly 6 generates force to the rotor assembly 8 fixed on the steering wheel 10 and simultaneously generates a reaction force to the stator assembly 6 due to the mutual force, and the reaction force is transmitted to the torque measurer 9 to measure data.
Example two
As shown in fig. 6-8, an inner rotor chassis dynamometer directly driven by a permanent magnet synchronous motor comprises a base 1, a main shaft 2, an encoder 4, a torque measurer 9 and a hub 10, wherein the base 1 comprises a bottom plate 11 and support columns 12 arranged on two sides of the bottom plate 11; the main shaft 2 is fixedly arranged between the support columns 12 through bearings 3; the hub 10 is fixed on the main shaft 2, the main shaft 2 is provided with electromagnetic resistance by a permanent magnet synchronous motor to simulate mechanical inertia, and the permanent magnet synchronous motor comprises a stator assembly 6 and a rotor assembly 8; the stator assembly 6 is fixedly arranged on the torque measurer 9 and provides a rotating resistance magnetic field for the rotor assembly; the rotor assembly 8 with permanent magnetic property is fixedly arranged on the main shaft 2 and corresponds to the stator assembly 6; the torque measurer 9 is used for measuring a reaction force generated by the rotor assembly 8 to the stator assembly 6 when the rotor assembly 8 receives electromagnetic force generated by the stator assembly 6, and the encoder 4 is used for measuring the rotating speed and the rotating angle of the main shaft 2.
Preferably, the torque measurer 9 includes a rotating part 93, a stationary part 91, and a pressure sensor 92; the rotating portion 93 is rotatably connected to the stationary portion 91 through a bearing; the pressure sensor 92 is disposed between the rotating portion 93 and the stationary portion 91, and is configured to sense a torque force of the rotating portion 93 relative to the stationary portion 91 when the rotating portion rotates; the center of the rotating part 93 is provided with a through hole 93-2 for the spindle 2 to pass through, the stator assembly 6 is fixedly arranged on the rotating part 93, and the rotating part 93 is provided with a spigot 93-1 for positioning the stator assembly 6; the stationary part 91 is fixedly mounted on the support column 12; the rotor assembly 8 comprises a rotor base 81 and a plurality of magnetic steel substrates 82 which are uniformly distributed on the rotor base 81 around the axial lead of the main shaft 2, wherein the rotor base 81 with a disc-shaped structure is fixedly arranged on the main shaft 2 through bolts; the stator assembly 6 includes a stator base 61 and a stator unit 62, the stator base 61 is fixedly mounted on the rotating portion 93, and the stator unit 62 is fixedly mounted on the stator base 61; further, the stator unit 62 is composed of a plurality of stator modules 62-1 having a sector-shaped disk-like structure; the stator module 62-1 includes a stator core and a stator winding wound around the stator core; the stator base 61 is in an annular cap structure, and the stator modules 62-1 are uniformly distributed on the end face of the stator base 61 around the axial lead of the stator base 61; further, the tail end of the stator base 61 is in an open structure; the permanent magnet synchronous motor is covered by a protective cover 5, and the protective cover 5 sleeved on the stator base 61 is fixed on the support column 12; the protective cover 5 is provided with an air inlet 51 and an air outlet 52, and the inner wall is provided with a heat insulation layer 53; the air inlet 51 is connected with an external cold air system; the encoder 4 includes a code wheel 42 and an induction element 41 for inducing the code wheel 42, the code wheel 42 is mounted on a spindle, and the induction element 41 is mounted on the stator base 61 to correspond to the code wheel 42.
When the intelligent steering wheel is in operation, the tire of the vehicle is in contact with the steering wheel 10, the tire of the vehicle drives the steering wheel 10 to rotate after the vehicle is started, at the moment, the steering wheel 10 automatically simulates the resistance of the vehicle in the road running process by adopting the full-electric inertia simulation technology under the electromagnetic force action of the stator assembly 6 and the rotor assembly 8 of the permanent magnet synchronous motor, so that the measurement of various parameters in the vehicle running process is realized, the encoder 4 is used for detecting the rotating speed and the rotating angle of the main shaft 2, and the stator assembly 6 generates force to the rotor assembly 8 fixed on the steering wheel 10 and simultaneously generates a reaction force to the stator assembly 6 due to the mutual force, and the reaction force is transmitted to the torque measurer 9 to measure data.
Example III
As shown in fig. 9-10, an inner rotor chassis dynamometer directly driven by a permanent magnet synchronous motor comprises a base 1, a main shaft 2, an encoder 4, a torque measurer 9 and a hub 10, wherein the base 1 comprises a bottom plate 11 and support columns 12 arranged on two sides of the bottom plate 11; the main shaft 2 is fixedly arranged between the support columns 12 through bearings 3; the hub 10 is fixed on the main shaft 2, the main shaft 2 is provided with electromagnetic resistance by a permanent magnet synchronous motor to simulate mechanical inertia, and the permanent magnet synchronous motor comprises a stator assembly 6 and a rotor assembly 8; the stator assembly 6 is fixedly arranged on the torque measurer 9 and provides a rotating resistance magnetic field for the rotor assembly; the rotor assembly 8 with permanent magnetic property is fixedly arranged on the main shaft 2 and corresponds to the stator assembly 6; the torque measurer 9 is used for measuring a reaction force generated by the rotor assembly 8 to the stator assembly 6 when the rotor assembly 8 receives electromagnetic force generated by the stator assembly 6, and the encoder 4 is used for measuring the rotating speed and the rotating angle of the main shaft 2.
Preferably, the permanent magnet synchronous motor is covered by a protective cover 5, and the protective cover 5 sleeved on the stator base 61 is fixed on the support column 12; the protective cover 5 is provided with an air inlet 51 and an air outlet 52, and the inner wall is provided with a heat insulation layer 53; the air inlet 51 is connected with an external cold air system; the torque measuring device 9 includes a rotating portion 93, a stationary portion 91, and a pressure sensor 92; the rotating portion 93 is rotatably connected to the stationary portion 91 through a bearing; the pressure sensor 92 is disposed between the rotating portion 93 and the stationary portion 91, and is configured to sense a torque force of the rotating portion 93 relative to the stationary portion 91 when the rotating portion rotates; the center of the rotating part 93 is provided with a through hole 93-2 for the spindle 2 to pass through, the stator assembly 6 is fixedly arranged on the rotating part 93, and the rotating part 93 is provided with a spigot 93-1 for positioning the stator assembly 6; the stationary part 91 is fixedly mounted on the protective cover 5; the rotor assembly 8 comprises a rotor base 81 and a plurality of magnetic steel substrates 82 which are uniformly distributed on the rotor base 81 around the axial lead of the main shaft 2, wherein the rotor base 81 with a disc-shaped structure is fixedly arranged on the main shaft 2 through bolts; the stator assembly 6 includes a stator base 61 and a stator unit 62, the stator base 61 is fixedly mounted on the rotating portion 93, and the stator unit 62 is fixedly mounted on the stator base 61; further, the stator unit 62 is composed of a plurality of stator modules 62-1 having a sector-shaped disk-like structure; the stator module 62-1 includes a stator core and a stator winding wound around the stator core; the stator base 61 is in an annular cap structure, and the stator modules 62-1 are uniformly distributed on the end face of the stator base 61 around the axial lead of the stator base 61; further, the tail end of the stator base 61 is in an open structure; 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 a spindle, and the sensing element 41 is mounted on the torque measurer 9 and corresponds to the code wheel 42.
When the intelligent steering wheel is in operation, the tire of the vehicle is in contact with the steering wheel 10, the tire of the vehicle drives the steering wheel 10 to rotate after the vehicle is started, at the moment, the steering wheel 10 automatically simulates the resistance of the vehicle in the road running process by adopting the full-electric inertia simulation technology under the electromagnetic force action of the stator assembly 6 and the rotor assembly 8 of the permanent magnet synchronous motor, so that the measurement of various parameters in the vehicle running process is realized, the encoder 4 is used for detecting the rotating speed and the rotating angle of the main shaft 2, and the stator assembly 6 generates force to the rotor assembly 8 fixed on the steering wheel 10 and simultaneously generates a reaction force to the stator assembly 6 due to the mutual force, and the reaction force is transmitted to the torque measurer 9 to measure data.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. The inner rotor chassis dynamometer directly driven by the permanent magnet synchronous motor comprises a base, a main shaft, an encoder, a torque measurer and a hub, wherein the main shaft is fixedly arranged on the base through a bearing; the hub is fixed on the main shaft, and is characterized in that the main shaft 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 torque measurer and provides a rotating resistance magnetic field for the rotor assembly; the rotor component with the permanent magnetic property is fixedly arranged on the main shaft and corresponds to the stator component; 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 electromagnetic force generated by the stator assembly; the encoder is used for measuring the rotating speed and the rotating angle of the main shaft; the stator assembly comprises a stator base and a stator unit; the stator unit consists of a plurality of stator modules with fan-shaped structures; the stator module comprises a stator iron core and a stator winding wound on the stator iron core;
the stator unit is divided into a plurality of independently controllable stator modules, and under the condition that the encoder accurately reads the relative positions of the rotor and the stator, each single stator module generates a specific magnetic field under the action of the controller, and electromagnetic force in the same rotation direction is generated for a single magnetic steel substrate passing through the magnetic field, so that rotating electromagnetic force is formed by combining the magnetic steel substrates together.
2. The permanent magnet synchronous motor direct-drive inner rotor chassis dynamometer of claim 1, wherein the torque measurer comprises a rotating part, a static part 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 is used for sensing 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 spindle to pass through, and the stator assembly is fixedly arranged on the rotating part; the stationary part is fixedly mounted on the base.
3. The permanent magnet synchronous motor direct drive inner rotor chassis dynamometer of claim 2, wherein the rotating portion is provided with a spigot for positioning the stator assembly.
4. The permanent magnet synchronous motor direct-driven inner rotor chassis dynamometer of claim 1, wherein the rotor assembly comprises a rotor base and a plurality of magnetic steel substrates uniformly distributed on the rotor base around the axis of the main shaft, and the rotor base is fixedly arranged on the main shaft.
5. The permanent magnet synchronous motor direct drive inner rotor chassis dynamometer of claim 2, wherein the stator base is fixedly mounted on the rotating portion, and the stator unit is fixedly mounted on the stator base.
6. The permanent magnet synchronous motor direct-driven inner rotor chassis dynamometer of claim 1, wherein the stator base is of an annular cap structure, and the stator modules are uniformly distributed on the inner wall of the stator base around the axial lead of the stator base.
7. The permanent magnet synchronous motor direct-driven inner rotor chassis dynamometer of claim 5, wherein the tail end of the stator base is of an open structure; the permanent magnet synchronous motor is covered by a protective cover, and the protective cover sleeved on the stator base is fixed on the base.
8. The permanent magnet synchronous motor direct-driven inner rotor chassis dynamometer of claim 7, wherein the protective cover is provided with an air inlet and an air outlet, and the inner wall is provided with a heat insulation layer; the air inlet is connected with an external cold air system.
9. The permanent magnet synchronous motor direct-driven inner rotor chassis dynamometer according to claim 1, wherein the encoder comprises a code disc and an induction element for inducing the code disc, the code disc is mounted on a main shaft or a rotor assembly, and the induction element is mounted on the torque measurer or a stator assembly and corresponds to the code disc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810735512.0A CN108663149B (en) | 2018-07-06 | 2018-07-06 | Inner rotor chassis dynamometer directly driven by permanent magnet synchronous motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810735512.0A CN108663149B (en) | 2018-07-06 | 2018-07-06 | Inner rotor chassis dynamometer directly driven by permanent magnet synchronous motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108663149A CN108663149A (en) | 2018-10-16 |
| CN108663149B true CN108663149B (en) | 2023-12-19 |
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| CN201810735512.0A Active CN108663149B (en) | 2018-07-06 | 2018-07-06 | Inner rotor chassis dynamometer directly driven by permanent magnet synchronous motor |
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| 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 |
| CN112747852A (en) * | 2019-10-29 | 2021-05-04 | 上海华依科技集团股份有限公司 | Device and method for measuring stress or moment of large-size heavy component |
| CN110926670B (en) * | 2019-11-22 | 2021-08-20 | 华中科技大学 | High-rotating-speed vertical loading dynamometer and application thereof |
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