CN108692961B - Chassis dynamometer test bed driven by permanent magnet synchronous motor - Google Patents
Chassis dynamometer test bed driven by permanent magnet synchronous motor Download PDFInfo
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- CN108692961B CN108692961B CN201810735692.2A CN201810735692A CN108692961B CN 108692961 B CN108692961 B CN 108692961B CN 201810735692 A CN201810735692 A CN 201810735692A CN 108692961 B CN108692961 B CN 108692961B
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- 230000001360 synchronised effect Effects 0.000 title claims abstract description 46
- 238000012360 testing method Methods 0.000 title claims abstract description 41
- 230000007246 mechanism Effects 0.000 claims abstract description 58
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- 238000006243 chemical reaction Methods 0.000 claims description 11
- 239000010959 steel Substances 0.000 claims description 11
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- 230000009471 action Effects 0.000 claims description 5
- 238000004804 winding Methods 0.000 claims description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 description 11
- 230000001681 protective effect Effects 0.000 description 11
- 230000009286 beneficial effect Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 8
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- 238000010586 diagram Methods 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
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- 238000012423 maintenance Methods 0.000 description 2
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- 230000004075 alteration Effects 0.000 description 1
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- 238000010168 coupling process Methods 0.000 description 1
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- 238000013461 design Methods 0.000 description 1
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- 238000007667 floating Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/0095—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes measuring work or mechanical power
Abstract
The invention discloses a chassis dynamometer test bed driven by a permanent magnet synchronous motor, which is characterized by comprising a dynamometer, a base, a sliding rail arranged on the base, a pushing mechanism, a lifting mechanism and at least one mounting seat which is slidably mounted on the sliding rail; the number of the dynamometers is at least two, the dynamometers work independently, and the dynamometers are driven by a permanent magnet synchronous motor and controlled by an all-electric inertia system; every two dynamometers are arranged on the same mounting seat; the pushing mechanism is used for pushing the mounting seat to move along the sliding rail; the lifting mechanism is used for adjusting the height of the dynamometer from the ground. The invention aims to provide a chassis dynamometer test bed which can be used for independently testing each wheel of a vehicle and is simple in structure and adjustable in wheelbase.
Description
Technical Field
The invention relates to the technical field of automobile detection equipment, in particular to a chassis dynamometer test bed 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, and simulates by a loading device to realize accurate simulation of various working conditions of the automobile, and can be used for loading and debugging of the automobile and diagnosing faults of the automobile under the loading condition; the comprehensive measuring system is formed by the comprehensive measuring system, the five-gas analyzer, the transmission smoke meter, the engine tachometer and the computer automatic control system, so that the automobile exhaust emission under different working conditions can be measured, the chassis dynamometer is convenient to use, and the performance is reliable 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.
With the continuous development of automobile technology, the full-time four-wheel drive technology is developed at a striking speed, four-wheel drive is gradually favored by more and more people, and currently, a chassis dynamometer is generally applied to detection of a single-drive automobile, so that in order to meet the increasingly-enhanced four-wheel drive detection requirement, the full-time four-wheel drive detection equipment is necessary to be invented; in order to adapt to different vehicle types, the wheel base of the dynamometer roller needs to be adjustable to meet different wheel base, so that the applicability of the test bed is improved.
Chinese patent (application number: CN201621234403.3; publication date: 2017.09.26) discloses a new energy automobile dynamometer test bed, which comprises a workbench base, a fixed drum mechanism, a movable drum mechanism, a pair of parallel guide rails and a screw transmission shaft, wherein the fixed drum mechanism is fixedly arranged on the workbench base, the pair of parallel guide rails is fixedly arranged on the workbench base, the screw transmission shaft is fixedly arranged below the workbench base, the movable drum mechanism is arranged on the workbench base through the pair of parallel guide rails and the screw transmission shaft, and screw bases are arranged at two ends of the screw transmission shaft. However, the technical scheme cannot realize the test of each wheel of the full-time four-wheel drive wheel.
Chinese patent (application number: CN201310450825.9; publication date: 2013.12.25) discloses a guiding mechanism of a multi-axle vehicle multi-wheelbase chassis dynamometer and a guiding method thereof. In the multi-axis vehicle multi-axis chassis dynamometer guiding mechanism: the first transfer case is connected with a first transmission shaft through a connector, the first transmission shaft is connected with a third unit, the first transfer case is connected with a fourth unit through a fourth transmission shaft, the first unit and the second unit are connected through a third transmission shaft, the second unit and the third unit are connected through a second transmission shaft, and the fourth unit and the fifth unit are connected through a fifth transmission shaft; all the units are arranged above the guide rail, and all the units can transversely move along the guide rail; the first to sixth units are connected through first to fifth worm and worm wheel systems, and the control system controls the first to fifth worm and worm wheel systems to push the first to sixth units to do transverse movement on the guide rail. The technical scheme can conduct chassis dynamometer guiding, can also guide wheelbase vehicles to conduct chassis dynamometer, mainly aims at vehicles with multiple axles, but cannot conduct accurate tests on all wheels of the full-time four-wheel drive, and is complex in mechanism.
Disclosure of Invention
The invention aims to provide a chassis dynamometer test bed which can be used for independently testing each wheel of a vehicle and is simple in structure and adjustable in wheelbase.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the chassis dynamometer test bed driven by the permanent magnet synchronous motor comprises a dynamometer, a base, a sliding rail arranged on the base, a pushing mechanism, a lifting mechanism and at least one mounting seat which is slidably mounted on the sliding rail; the number of the dynamometers is at least two, the dynamometers work independently, and the dynamometers are driven by a permanent magnet synchronous motor and controlled by an all-electric inertia system; every two dynamometers are arranged on the same mounting seat; the pushing mechanism is used for pushing the mounting seat to move along the sliding rail; the lifting mechanism is used for adjusting the height of the dynamometer from the ground.
Preferably, the pushing mechanism comprises a screw motor, a screw, a positioning block and a thrust block arranged on the mounting seat, wherein the thrust block is provided with a threaded hole matched with the screw, and the screw is rotatably connected in the positioning block fixed on the base; the screw motor connected with the screw is fixedly arranged on the base; the beneficial effects are that: the pushing mechanism is simple in structure and low in cost, and the displacement of the mounting seat can be accurately adjusted by adopting the servo control system to the screw motor. Further, a distance sensor is arranged on the mounting seats and used for detecting the distance between two adjacent mounting seats, the distance sensor is connected with a controller, and the controller sends out instructions to control the screw motor of the pushing mechanism to operate until the position is specified according to the sensing signals of the sensor.
Preferably, the dynamometer 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 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 beneficial effects are that: the dynamometer has compact structure and small occupied volume, and solves the problems that two dynamometers are installed side by side on a base with limited space and the detection and measurement width is required to be met, so that an implementation scheme that a test bed carries out independent test on each wheel of a four-wheel drive vehicle is realized.
Further preferably, the rotor assembly comprises a rotor base and a plurality of magnetic steel substrates uniformly distributed on the rotor base around the axial lead 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 providing a template capable of being accurately positioned for the magnetic steel substrate, 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 installed on the rotating part, and the stator unit is fixedly installed on the stator base; the beneficial effects are that: the stator base is used for providing a positioning upper mounting plate 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 several stator modules; 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 mounting seat comprises a lower supporting seat and an upper mounting plate; the lifting mechanism is a hydraulic push rod and is arranged between the lower supporting seat and the upper mounting plate, a guide rod is arranged on the upper mounting plate, and a guide block matched with the guide rod is arranged on the lower supporting seat; the beneficial effects are that: when the vehicle is tested, the vehicle is generally tested in an environment bin, sometimes the temperature of the environment bin is between eighty ℃ and minus sixty ℃, and when the vehicle does not work, the dynamometer is required to be recovered to a closed bin for protection through a jacking mechanism, so that all parts of the dynamometer are prevented from being damaged in a severe environment; by adopting a hinged floating connection mode, the test of different road conditions can be realized by utilizing a jacking mechanism.
Further preferably, the hydraulic push rod is provided with a pressure sensor for sensing the weight of the loaded object; the beneficial effects are that: the test bed is connected with the controller, the pressure sensor and the lifting mechanism are connected with the controller, before the vehicle is tested, the bearing weight of each wheel sensed by the pressure sensor is transferred to the controller, according to data feedback, the controller sends out instructions to lift the lifting mechanism, the height of the dynamometer is adjusted, the bearing capacity of each dynamometer automatically reaches balance, optimal testing conditions are achieved, and testing data are more accurate.
Preferably, the mounting seat is divided into a first mounting seat and a second mounting seat which are arranged in parallel; the first mounting seat is fixedly connected with the base, and the second mounting seat is slidably arranged on the sliding rail through a sliding block arranged at the lower part of the first mounting seat; the four dynamometers are arranged, wherein two dynamometers are arranged on the first mounting seat, and the other two dynamometers are arranged on the second mounting seat.
Further preferably, a heat shield is arranged outside the synchronous motor and the screw motor, a vent hole is arranged on the heat shield, and the vent hole is connected with a cooling system; the heat-insulating type dynamometer has the beneficial effects that the heating component is thermally insulated, the heat of the equipment is prevented from affecting the temperature in the environment bin, the motor is also protected from being affected by environmental factors, and the reliability of the dynamometer is enhanced.
Compared with the prior art, the invention has the beneficial effects that 1, four dynamometers work cooperatively, each wheel has independent test data, so that the data is more accurate and the test data is more convincing; 2. the hub wheelbase can be adjusted, so that different vehicle types can be tested, and the applicability of the equipment is enhanced; 3. the heat shield is designed to enable the equipment to have a sealed heat dissipation system, so that the influence of the equipment on an environment bin is reduced, the equipment is also protected from being influenced by the environment, and the reliability of the equipment is enhanced; 4. the single dynamometer is controlled and driven by adopting a permanent magnet synchronous motor, and is controlled by utilizing a full-electric inertia system, so that the equipment has a simple structure and a small volume; and the integral installation is convenient.
Drawings
Fig. 1 is a schematic structural diagram of a chassis dynamometer test stand driven by a permanent magnet synchronous motor according to a first embodiment;
FIG. 2 is a side view of a chassis dynamometer test stand driven by a permanent magnet synchronous motor according to an embodiment I;
FIG. 3 is a partial cross-sectional view of a chassis dynamometer test stand driven by a permanent magnet synchronous motor according to the first embodiment;
fig. 4 is a schematic structural diagram of the dynamometer driven by the permanent magnet synchronous motor;
FIG. 5 is a schematic view of the stator assembly and the rotor assembly;
FIG. 6 is a schematic view of the structure of the protective cover;
fig. 7 is a schematic structural diagram of a chassis dynamometer test stand driven by a permanent magnet synchronous motor according to the second embodiment;
fig. 8 is a schematic structural diagram of a chassis dynamometer test stand driven by a permanent magnet synchronous motor according to the third embodiment;
in the figure: 1. a base; 2. a dynamometer; 3. a screw motor; 4. a coupling; 5. a lifting mechanism; 51. a guide block; 52. a guide rod; 54. a pressure sensor; 6. a mounting base; 6a, a lower supporting seat; 6b, an upper mounting plate; 61. a first mounting seat; 62. a second mounting seat; 63. a third mounting seat; 7. a thrust block; 8. a screw; 9. a positioning block; 10. a slide rail; 21. a base; 211. a bottom plate; 212. a support column; 22. a main shaft; 23. a bearing; 24. an encoder; 25. a protective cover; 251. an air inlet; 252. an air outlet; 253. a thermal insulation layer; 26. a stator assembly; 261. a stator base; 262. a stator unit; 262-1, stator module; 27. a key; 28. a rotor assembly; 281. a rotor base; 282. a magnetic steel substrate; 29. a torque measurer; 291. a stationary part; 292. a pressure sensor; 293. a rotating part; 210. 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. 1-6, a chassis dynamometer test bed driven by a permanent magnet synchronous motor comprises a dynamometer 2, a base 1, a sliding rail 10 arranged on the base, a pushing mechanism, a lifting mechanism 5, a first mounting seat 61 and a second mounting seat 62; the first mounting seat 61 is fixed at one end of the base 1, and the second mounting seat 62 is slidably mounted on the sliding rail 10 through a sliding block arranged at the lower part of the second mounting seat; the dynamometer 2 comprises four dynamometers which work independently and are driven by a permanent magnet synchronous motor and controlled by an all-electric inertia system; wherein two dynamometers 2 are arranged on a first mounting seat 61; the pushing mechanism is used for pushing the second mounting seat 62 to move along the sliding rail 10; the lifting mechanism 5 is used for adjusting the height of the dynamometer 2 from the ground.
Preferably, the dynamometer 2 includes a base 21, a main shaft 22, an encoder 24, a torque measurer 29 and a hub 210, wherein the base 21 includes a bottom plate 211 and support columns 212 disposed on two sides of the bottom plate 211; the main shaft 22 is fixedly arranged between the support columns 212 through bearings 23; the hub 210 is fixed on the spindle 22, the spindle 22 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 26 and a rotor assembly 28; the stator assembly 26 is fixedly mounted on the torque measurer 29 to provide a rotating resistance magnetic field for the rotor assembly; the rotor assembly 28 with permanent magnetic property is fixedly arranged on the main shaft 22 and corresponds to the stator assembly 26; the torque measurer 29 is configured to measure a reaction force generated by the rotor assembly 28 to the stator assembly 26 when the rotor assembly 28 receives the electromagnetic force generated by the stator assembly 26, and the encoder 24 is configured to measure a rotation speed and a rotation angle of the main shaft 22; further preferably, the torque measurer 29 includes a rotating part 293, a stationary part 291, and a pressure sensor 292; the rotating part 293 is rotatably connected to the stationary part 291 by a bearing; the pressure sensor 292 is disposed between the rotating portion 293 and the stationary portion 291, and is configured to sense a torque force of the rotating portion 293 relative to the stationary portion 291 when the rotating portion 293 rotates; the center of the rotating part 293 is provided with a through hole for the spindle 22 to pass through, the stator assembly 26 is fixedly arranged on the rotating part 293, and the rotating part 293 is provided with a spigot for positioning the stator assembly 26; the stationary portion 291 is fixedly mounted on the support column 212; the rotor assembly 28 comprises a rotor base 281 and a plurality of magnetic steel substrates 282 uniformly distributed on the rotor base 281 around the axis of the main shaft 22, wherein the rotor base 281 is fixedly arranged on the main shaft 22 through a key 27; the stator assembly 26 includes a stator base 261 and a stator unit 262, the stator base 261 is fixedly mounted on the rotating part 293, and the stator unit 262 is fixedly mounted on the stator base 261; further, the stator unit 262 is composed of a plurality of stator modules 262-1 having a fan-shaped ring structure; the stator module 262-1 includes a stator core and a stator winding wound around the stator core; the stator base 261 is in an annular cap structure, and the stator modules 262-1 are uniformly distributed on the circumferential inner wall of the stator base 261 around the axial lead of the stator base 261; further, the tail end of the stator base 261 is in an open structure; the permanent magnet synchronous motor is covered by a protective cover 25, and the protective cover 25 sleeved on the stator base 261 is fixed on the support column 212; the protective cover 25 is provided with an air inlet 251 and an air outlet 252, and the inner wall is provided with a heat insulation layer 253; the air inlet 251 is connected with an external cold air system; the encoder 24 includes a code wheel and an induction element for inducing the code wheel, the code wheel is mounted on the spindle, and the induction element is mounted on the stator base 261 and corresponds to the code wheel; the mounting seat 6 comprises a lower supporting seat 6a and an upper mounting plate 6b; the lifting mechanism 5 is a hydraulic push rod and is arranged between the lower supporting seat 6a and the upper mounting plate 6b, the upper mounting plate 6b is provided with a guide rod 52, and the lower supporting seat 6a is provided with a guide block 51 which is matched with the guide rod 52; the lifting mechanism 5 is provided with a pressure sensor 54 for sensing the weight of the loaded object; the pushing mechanism comprises a screw motor 3, a screw 8, a positioning block 9 and a thrust block 7 arranged on the mounting seat, wherein a threaded hole matched with the screw 8 is formed in the thrust block 7, and the screw 8 is rotatably connected in the positioning block 9 fixed on the base 1; the screw motor connected with the screw 8 is fixedly arranged on the base, and the dynamometer, the pushing mechanism and the lifting mechanism are electrically connected with the controller and are coordinated and controlled by the controller.
During operation, the test bed starts the screw motor 3 according to the wheel base of the vehicle to be tested, under the control of the controller, the rotating screw 8 pushes the thrust block 7 to move, and then pushes the second mounting seat 62 to move along the sliding rail, the distance between the power detectors 2 is adjusted, when the tire of the vehicle contacts the hub 210, each driving wheel of the vehicle drives the hub 210 to rotate after the tire of the vehicle is started, at this time, the hub 210 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 26 and the rotor assembly 28 of the permanent magnet synchronous motor, and further, the measurement of each parameter in the vehicle running process is realized, the encoder 24 is used for detecting the rotating speed and the rotating angle of the main shaft 22, and the stator assembly 26 and the rotor assembly 28 generate a reaction force to the stator assembly 26 and the rotor assembly 28, and the reaction force is transmitted to the torque measurer 29 to measure data because the force is mutual.
Example two
As shown in fig. 7, the chassis dynamometer test stand driven by the permanent magnet synchronous motor comprises a dynamometer 2, a base 1, a sliding rail 10 arranged on the base, a pushing mechanism, a lifting mechanism 5, a first mounting seat 61 and a second mounting seat 62; wherein the first mounting seat 61 and the second mounting seat 62 are both slidably mounted on the sliding rail 10 through sliding blocks arranged at the lower parts of the first mounting seat and the second mounting seat; the dynamometer 2 comprises four dynamometers which work independently and are driven by a permanent magnet synchronous motor and controlled by an all-electric inertia system; two of the dynamometers 2 are arranged on the first mounting seat 61, and the other two dynamometers are arranged on the second mounting seat 62; the pushing mechanism is used for pushing the mounting seat 6 to move along the sliding rail 10; the lifting mechanism 5 is used for adjusting the height of the dynamometer 2 from the ground.
Preferably, the dynamometer 2 includes a base 21, a main shaft 22, an encoder 24, a torque measurer 29 and a hub 210, wherein the base 21 includes a bottom plate 211 and support columns 212 disposed on two sides of the bottom plate 211; the main shaft 22 is fixedly arranged between the support columns 212 through bearings 23; the hub 210 is fixed on the spindle 22, the spindle 22 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 26 and a rotor assembly 28; the stator assembly 26 is fixedly mounted on the torque measurer 29 to provide a rotating resistance magnetic field for the rotor assembly; the rotor assembly 28 with permanent magnetic property is fixedly arranged on the main shaft 22 and corresponds to the stator assembly 26; the torque measurer 29 is configured to measure a reaction force generated by the rotor assembly 28 to the stator assembly 26 when the rotor assembly 28 receives the electromagnetic force generated by the stator assembly 26, and the encoder 24 is configured to measure a rotation speed and a rotation angle of the main shaft 22; further preferably, the torque measurer 29 includes a rotating part 293, a stationary part 291, and a pressure sensor 292; the rotating part 293 is rotatably connected to the stationary part 291 by a bearing; the pressure sensor 292 is disposed between the rotating portion 293 and the stationary portion 291, and is configured to sense a torque force of the rotating portion 293 relative to the stationary portion 291 when the rotating portion 293 rotates; the center of the rotating part 293 is provided with a through hole for the spindle 22 to pass through, the stator assembly 26 is fixedly arranged on the rotating part 293, and the rotating part 293 is provided with a spigot for positioning the stator assembly 26; the stationary portion 291 is fixedly mounted on the support column 212; the rotor assembly 28 comprises a rotor base 281 and a plurality of magnetic steel substrates 282 uniformly distributed on the rotor base 281 around the axis of the main shaft 22, wherein the rotor base 281 is fixedly arranged on the main shaft 22 through a key 27; the stator assembly 26 includes a stator base 261 and a stator unit 262, the stator base 261 is fixedly mounted on the rotating part 293, and the stator unit 262 is fixedly mounted on the stator base 261; further, the stator unit 262 is composed of a plurality of stator modules 262-1 having a fan-shaped ring structure; the stator module 262-1 includes a stator core and a stator winding wound around the stator core; the stator base 261 is in an annular cap structure, and the stator modules 262-1 are uniformly distributed on the circumferential inner wall of the stator base 261 around the axial lead of the stator base 261; further, the tail end of the stator base 261 is in an open structure; the permanent magnet synchronous motor is covered by a protective cover 25, and the protective cover 25 sleeved on the stator base 261 is fixed on the support column 212; the protective cover 25 is provided with an air inlet 251 and an air outlet 252, and the inner wall is provided with a heat insulation layer 253; the air inlet 251 is connected with an external cold air system; the encoder 24 includes a code wheel and an induction element for inducing the code wheel, the code wheel is mounted on the spindle, and the induction element is mounted on the stator base 261 and corresponds to the code wheel; the mounting seat 6 comprises a lower supporting seat 6a and an upper mounting plate 6b; the lifting mechanism 5 is a hydraulic push rod and is arranged between the lower supporting seat 6a and the upper mounting plate 6b, the upper mounting plate 6b is provided with a guide rod 52, and the lower supporting seat 6a is provided with a guide block 51 which is matched with the guide rod 52; the lifting mechanism 5 is provided with a pressure sensor 54 for sensing the weight of the loaded object; the pushing mechanism comprises a screw motor 3, a screw 8, a positioning block 9 and a thrust block 7 arranged on the mounting seat, wherein a threaded hole matched with the screw 8 is formed in the thrust block 7, and the screw 8 is rotatably connected in the positioning block 9 fixed on the base 1; the screw motor connected with the screw 8 is fixedly arranged on the base, and the dynamometer, the pushing mechanism and the lifting mechanism are electrically connected with the controller and are coordinated and controlled by the controller.
During operation, the test bed starts the screw motor 3 according to the wheel base of the vehicle to be tested, under the control of the controller, the rotating screw 8 pushes the thrust block 7 to move, and then pushes the second mounting seat 62 to move along the sliding rail, the distance between the power detectors 2 is adjusted, when the tire of the vehicle contacts the hub 210, each driving wheel of the vehicle drives the hub 210 to rotate after the tire of the vehicle is started, at this time, the hub 210 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 26 and the rotor assembly 28 of the permanent magnet synchronous motor, and further, the measurement of each parameter in the vehicle running process is realized, the encoder 24 is used for detecting the rotating speed and the rotating angle of the main shaft 22, and the stator assembly 26 and the rotor assembly 28 generate a reaction force to the stator assembly 26 and the rotor assembly 28, and the reaction force is transmitted to the torque measurer 29 to measure data because the force is mutual.
Example III
As shown in fig. 8, the chassis dynamometer test stand driven by the permanent magnet synchronous motor comprises a dynamometer 2, a base 1, a sliding rail 10 arranged on the base, a pushing mechanism, a lifting mechanism 5, a first mounting seat 61, a second mounting seat 62 and a third mounting seat 63; the first mounting seat 61, the second mounting seat 62 and the third mounting seat 63 are all slidably mounted on the sliding rail 10 through sliding blocks arranged at the lower parts of the first mounting seat and the second mounting seat; the dynamometer 2 comprises six dynamometers which work independently and are driven by a permanent magnet synchronous motor and controlled by an all-electric inertia system; wherein two dynamometers 2 are arranged on the same first mounting seat 61, two dynamometers are arranged on the second mounting seat 62, and the rest two dynamometers are arranged on the second mounting seat 62; the pushing mechanism is used for pushing the mounting seat 6 to move along the sliding rail 10; the lifting mechanism 5 is used for adjusting the height of the dynamometer 2 from the ground.
Preferably, the dynamometer 2 includes a base 21, a main shaft 22, an encoder 24, a torque measurer 29 and a hub 210, wherein the base 21 includes a bottom plate 211 and support columns 212 disposed on two sides of the bottom plate 211; the main shaft 22 is fixedly arranged between the support columns 212 through bearings 23; the hub 210 is fixed on the spindle 22, the spindle 22 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 26 and a rotor assembly 28; the stator assembly 26 is fixedly mounted on the torque measurer 29 to provide a rotating resistance magnetic field for the rotor assembly; the rotor assembly 28 with permanent magnetic property is fixedly arranged on the main shaft 22 and corresponds to the stator assembly 26; the torque measurer 29 is configured to measure a reaction force generated by the rotor assembly 28 to the stator assembly 26 when the rotor assembly 28 receives the electromagnetic force generated by the stator assembly 26, and the encoder 24 is configured to measure a rotation speed and a rotation angle of the main shaft 22; further preferably, the torque measurer 29 includes a rotating part 293, a stationary part 291, and a pressure sensor 292; the rotating part 293 is rotatably connected to the stationary part 291 by a bearing; the pressure sensor 292 is disposed between the rotating portion 293 and the stationary portion 291, and is configured to sense a torque force of the rotating portion 293 relative to the stationary portion 291 when the rotating portion 293 rotates; the center of the rotating part 293 is provided with a through hole for the spindle 22 to pass through, the stator assembly 26 is fixedly arranged on the rotating part 293, and the rotating part 293 is provided with a spigot for positioning the stator assembly 26; the stationary portion 291 is fixedly mounted on the support column 212; the rotor assembly 28 comprises a rotor base 281 and a plurality of magnetic steel substrates 282 uniformly distributed on the rotor base 281 around the axis of the main shaft 22, wherein the rotor base 281 is fixedly arranged on the main shaft 22 through a key 27; the stator assembly 26 includes a stator base 261 and a stator unit 262, the stator base 261 is fixedly mounted on the rotating part 293, and the stator unit 262 is fixedly mounted on the stator base 261; further, the stator unit 262 is composed of a plurality of stator modules 262-1 having a fan-shaped ring structure; the stator module 262-1 includes a stator core and a stator winding wound around the stator core; the stator base 261 is in an annular cap structure, and the stator modules 262-1 are uniformly distributed on the circumferential inner wall of the stator base 261 around the axial lead of the stator base 261; further, the tail end of the stator base 261 is in an open structure; the permanent magnet synchronous motor is covered by a protective cover 25, and the protective cover 25 sleeved on the stator base 261 is fixed on the support column 212; the protective cover 25 is provided with an air inlet 251 and an air outlet 252, and the inner wall is provided with a heat insulation layer 253; the air inlet 251 is connected with an external cold air system; the encoder 24 includes a code wheel and an induction element for inducing the code wheel, the code wheel is mounted on the spindle, and the induction element is mounted on the stator base 261 and corresponds to the code wheel; the mounting seat 6 comprises a lower supporting seat 6a and an upper mounting plate 6b; the lifting mechanism 5 is a hydraulic push rod and is arranged between the lower supporting seat 6a and the upper mounting plate 6b, the upper mounting plate 6b is provided with a guide rod 52, and the lower supporting seat 6a is provided with a guide block 51 which is matched with the guide rod 52; the lifting mechanism 5 is provided with a pressure sensor 54 for sensing the weight of the loaded object; the pushing mechanism comprises a screw motor 3, a screw 8, a positioning block 9 and a thrust block 7 arranged on the mounting seat, wherein a threaded hole matched with the screw 8 is formed in the thrust block 7, and the screw 8 is rotatably connected in the positioning block 9 fixed on the base 1; the screw motor connected with the screw 8 is fixedly arranged on the base, and the dynamometer, the pushing mechanism and the lifting mechanism are electrically connected with the controller and are coordinated and controlled by the controller.
During operation, the test bed starts the screw motor 3 according to the wheel base of the vehicle to be tested, under the control of the controller, the rotating screw 8 pushes the thrust block 7 to move, and then pushes the second mounting seat 62 to move along the sliding rail, the distance between the power detectors 2 is adjusted, when the tire of the vehicle contacts the hub 210, each driving wheel of the vehicle drives the hub 210 to rotate after the tire of the vehicle is started, at this time, the hub 210 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 26 and the rotor assembly 28 of the permanent magnet synchronous motor, and further, the measurement of each parameter in the vehicle running process is realized, the encoder 24 is used for detecting the rotating speed and the rotating angle of the main shaft 22, and the stator assembly 26 and the rotor assembly 28 generate a reaction force to the stator assembly 26 and the rotor assembly 28, and the reaction force is transmitted to the torque measurer 29 to measure data because the force is mutual.
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 (7)
1. The chassis dynamometer test bed driven by the permanent magnet synchronous motor is characterized by comprising a dynamometer, a base, a sliding rail arranged on the base, a pushing mechanism, a lifting mechanism and at least one mounting seat which is slidably mounted on the sliding rail; the number of the dynamometers is at least two, the dynamometers work independently, and the dynamometers are driven by a permanent magnet synchronous motor and controlled by an all-electric inertia system; every two dynamometers are arranged on the same mounting seat; the pushing mechanism is used for pushing the mounting seat to move along the sliding rail; the lifting mechanism is used for adjusting the height of the dynamometer from the ground; the dynamometer 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; the stator assembly comprises a stator base and a stator unit, wherein the stator base is fixedly arranged on a rotating part of the torque measurer, and the stator unit is fixedly arranged on the stator base; the stator unit consists of a plurality of stator modules; 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, 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 chassis dynamometer test bed driven by a permanent magnet synchronous motor according to claim 1, wherein the pushing mechanism comprises a screw motor, a screw, a positioning block and a thrust block arranged on the mounting seat, the thrust block is provided with a threaded hole matched with the screw, and the screw is fixedly arranged in the positioning block arranged on the base through a bearing; the screw is provided with rotary power by a screw motor.
3. The chassis dynamometer test stand driven by a permanent magnet synchronous motor according to 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.
4. The chassis dynamometer test stand driven by a permanent magnet synchronous motor according to claim 1, wherein the mounting base comprises a lower supporting base and an upper mounting plate; the lifting mechanism is a hydraulic push rod and is installed between the lower supporting seat and the upper mounting plate, a guide rod is arranged on the upper mounting plate, and a guide block matched with the guide rod is arranged on the lower supporting seat.
5. The permanent magnet synchronous motor-driven chassis dynamometer test bed according to claim 4, wherein the lifting mechanism is provided with a pressure sensor for sensing the weight of the loaded object.
6. The chassis dynamometer test stand driven by a permanent magnet synchronous motor according to claim 1, wherein the mounting base is divided into a first mounting base and a second mounting base, which are arranged in parallel with each other; the first mounting seat is fixedly connected with the base, and the second mounting seat is slidably arranged on the sliding rail through a sliding block arranged at the lower part of the first mounting seat; the four dynamometers are arranged, wherein two dynamometers are arranged on the first mounting seat, and the other two dynamometers are arranged on the second mounting seat.
7. The chassis dynamometer test stand driven by a permanent magnet synchronous motor according to claim 1, wherein a heat shield is sleeved outside the permanent magnet synchronous motor and the screw motor, a vent hole is arranged on the heat shield, and the vent hole is connected with an external cooling system.
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| CN201810735692.2A CN108692961B (en) | 2018-07-06 | 2018-07-06 | Chassis dynamometer test bed driven by permanent magnet synchronous motor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109910296A (en) * | 2019-04-09 | 2019-06-21 | 苏州慧通汇创科技有限公司 | A kind of DLP laser fast shaping 3D printer platform convenient for manipulation |
| CN112229649B (en) * | 2020-09-30 | 2023-03-14 | 山东交通学院 | Automobile inertia simulation experiment table with table body capable of lifting in balance and adjustable wheelbase |
| CN112985659B (en) * | 2021-02-22 | 2022-04-12 | 江苏徐工工程机械研究院有限公司 | Heavy-load, high-power and large-torque chassis dynamometer under multi-environment system |
| CN113125166B (en) * | 2021-02-22 | 2023-04-28 | 湖北环一电磁装备工程技术有限公司 | Mounting structure and mounting method of chassis dynamometer rotating hub tension-compression sensor |
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