Movable driving motor EMC dynamometer

Abstract

The invention discloses a movable driving motor EMC dynamometer, which comprises a rack, the bottom of the rack is provided with Foma trundles, the rack is internally provided with a support device capable of moving up and down, the support device is fixedly provided with an eddy current dynamometer, and the transmission shaft end of the eddy current dynamometer is provided with a large belt wheel; a support frame is arranged at the top of the rack, a workbench is arranged at the front end of the support frame, and a sample mounting plate and a sensor bracket are arranged on the workbench; the top of the sensor support is provided with a torque sensor. A first coupling is arranged at the front end of the torque sensor, and a second coupling is arranged at the rear end; a transmission shaft is arranged on the supporting frame, the front end of the transmission shaft is connected with the second coupler, a small belt wheel is arranged at the rear end of the transmission shaft, and the small belt wheel is in transmission connection with the large belt wheel through a transmission belt. The movable driving motor EMC dynamometer can efficiently and rapidly carry out an EMC test of an electric drive system, the large belt wheel and the small belt wheel can be replaced, the effect of speed reduction or torque increase is achieved, and high rotating speed and large torque loading can be achieved.

Description

Technical Field

[0001] The present invention relates to an EMC test of a drive motor, and in particular to a movable EMC dynamometer for a drive motor. Background Art

[0002] With the continuous development of new energy vehicle technology, more and more consumers are choosing new energy vehicles as their means of transportation. The electric drive system is one of the most important components of new energy vehicles. In order to determine whether the electromagnetic radiation generated by the drive motor in the electric drive system has any impact on the human body and other normally functioning electrical products, the drive motor needs to be tested for EMC performance requirements.

[0003] EMC testing, also known as electromagnetic compatibility, refers to the comprehensive assessment of the electromagnetic interference (EMI) and anti-interference capability (EMS) of electronic products. It is one of the most important indicators of product quality. The measurement of electromagnetic compatibility consists of a test site and test instruments.

[0004] Currently, domestic OEMs must meet the mandatory national standard GB14023-2011 for their entire vehicles to comply with regulatory requirements. Furthermore, starting January 1, 2021, all vehicle models must comply with the even more stringent national EMC standard GB34660-2017. This will inevitably increase OEMs' EMC performance requirements for components supplied by various suppliers. As one of the three main electrical components in new energy vehicles, the electric drive system features high power, numerous high-frequency switching devices, complex control circuits, and inductive loads, making it one of the most challenging and challenging components to address in new energy vehicles.

[0005] As a tester for the EMC performance of drive systems, existing drive motor EMC dynamometers are subject to the limit of the total power of the equipment and cannot meet the requirements of high speed and high torque at the same time, making them inflexible to use. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a movable drive motor EMC dynamometer which is easy to assemble and disassemble and can realize transmission with different gear ratios.

[0007] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0008] A movable drive motor EMC dynamometer comprises a frame, a Forma caster is provided at the bottom of the frame, a support device capable of moving up and down is provided inside the frame, an eddy current dynamometer is fixed on the support device, the height of the eddy current dynamometer can be adjusted by the support device, a large pulley fixedly connected to the drive shaft end of the eddy current dynamometer is provided, and the large pulley is close to the rear end of the frame; a support frame is provided at the top of the frame near the rear side, a workbench is provided at the top of the frame at the front end of the support frame, a sample mounting plate and a sensor bracket capable of moving forward and backward are provided on the workbench, and the sensor bracket is between the sample mounting plate and The cam is fixedly mounted on the support frame, and the cam is fixedly mounted on the support frame, and the cam is fixedly mounted on the support frame, and the cam is fixedly mounted on the support frame, and the cam is fixedly mounted on the support frame, and the cam is fixedly mounted on the support frame, and the cam is fixedly mounted on the support frame, and the cam is fixedly mounted on the support frame, and the cam is fixedly mounted on the support frame, and the cam is fixedly mounted on the support frame, and the cam is fixedly mounted on the support frame, and the cam is fixedly mounted on the support frame,

[0009] Furthermore, the support device consists of a motor mounting base plate, a side connecting plate, a height adjustment support plate and a height adjustment rod; the side connecting plate and the height adjustment support plate are fixedly welded in the frame, one end of the motor mounting base plate is hingedly connected to the side connecting plate, and the top of the other end corresponds to the bottom of the height adjustment support plate up and down; the eddy current dynamometer is fixed on the motor mounting base plate; a connecting groove is provided on the end of the motor mounting base plate corresponding to the height adjustment support plate, and the connecting groove corresponds to the height adjustment support plate up and down, one end of the height adjustment rod is axially connected in the connecting groove, and the other end passes through the height adjustment support plate upward and is limited by an adjusting nut provided on the top of the height adjustment support plate.

[0010] Furthermore, the height adjustment rod is composed of an adjusting screw and a ball joint fixedly welded to the bottom of the adjusting screw. The ball joint is connected to the connecting groove through a pin shaft. The height adjustment support plate is provided with a guide connecting hole connected up and down. The adjusting screw is vertically inserted into the guide connecting hole. The adjusting nut is threadedly engaged with the adjusting screw and is screwed to the position of the adjusting screw above the height adjustment support plate.

[0011] Furthermore, a sample mounting hole connected front to back is provided at the end of the sample mounting plate, and the end face center of the sample mounting hole corresponds front to back to the end face center of the first coupling; the front of the sample mounting plate is provided with a plurality of fixed connection holes in an array located on the periphery of the sample mounting hole.

[0012] Furthermore, the transmission shaft and the support frame are movably connected via a bearing.

[0013] Furthermore, a reinforcing support rod is welded to the top of the frame, and there are multiple reinforcing support rods, which are arranged in parallel with equal intervals in the front and back. The workbench is fixedly connected to the top of the reinforcing support rod by bolts; the workbench is provided with multiple inverted T-slots running through the front and back along its front and back length directions, and the sample mounting plate and the sensor bracket are fixed to the workbench by T-bolts matching the inverted T-slots.

[0014] Furthermore, ferrite absorbing bricks are provided on the front of the frame.

[0015] Furthermore, two slide rails are arranged longitudinally front and back on the top of the rack, and the two slide rails are symmetrically arranged at the top of the rack near the left and right sides. The slide rails are provided with sliders connected to the sliders for front and back sliding. The sliders of the two slide rails are provided with protective covers fixedly connected to the sliders. The protective covers can move back and forth with the sliders, and can cover the outside of the sample mounting plate and the torque sensor.

[0016] Furthermore, a pulley protection cover is provided on the outside of the small pulley.

[0017] Compared with the existing technology, the benefits of the present invention are: this movable drive motor EMC dynamometer can perform EMC tests on electric drive systems efficiently and quickly, has a simple structure, stable operation, and is easy to use and maintain. The small pulley and the large pulley can be replaced as needed, thereby realizing transmission with different gear ratios. The input speed range is wide and can be used for type tests of various motors and power machinery such as variable frequency speed regulation. The output torque and speed of the tested drive motor can be measured to obtain the output power; the large and small pulleys can be replaced to achieve the effect of deceleration or torque increase; and high speed and high torque load can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is a schematic diagram of the front-axis structural side of a movable drive motor EMC dynamometer of the present invention;

[0020] Figure 2 This is a schematic diagram of the back-axis structure of a movable drive motor EMC dynamometer according to the present invention;

[0021] Figure 3 This is a schematic diagram of the bottom structure of a movable drive motor EMC dynamometer according to the present invention;

[0022] Figure 4 This is a schematic diagram of the top view of a movable drive motor EMC dynamometer according to the present invention;

[0023] Figure 5 yes Figure 4 Structural cross-sectional view of AA in the middle;

[0024] Figure 6 This is a schematic diagram of the internal structure of a movable drive motor EMC dynamometer of the present invention;

[0025] Figure 7 This is a schematic diagram of the top structure of a support device in a movable drive motor EMC dynamometer of the present invention;

[0026] Figure 8 This is a schematic diagram of the bottom structure of a supporting device in a movable drive motor EMC dynamometer of the present invention;

[0027] Figure 9 The present invention is a schematic diagram of the assembly structure of an eddy current dynamometer and a supporting device in a movable drive motor EMC dynamometer.

[0028] In the figure: 1. Frame; 11. Ferrite absorbing brick; 12. Forma caster; 13. Slide rail; 131. Slider; 2. Workbench; 20. Inverted T-slot; 200. Reinforced support rod; 21. Sample mounting plate; 211. Sample mounting hole; 3. Torque sensor; 31. First coupling; 32. Second coupling; 33. Sensor bracket; 4. Support frame; 41. Drive shaft; 42. Bearing; 5. Pulley guard; 51. Small pulley; 52. Drive belt; 53. Large pulley; 6. Eddy current dynamometer; 7. Support device; 71. Motor mounting base; 711. Connecting groove; 72. Side connecting plate; 73. Height adjustment support plate; 731. Guide connecting hole; 74. Height adjustment rod; 741. Adjusting screw; 742. Limit nut; 743. Ball joint; 75. Pin shaft. DETAILED DESCRIPTION

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are intended to fall within the scope of protection of the present invention. It should be noted that similar reference numerals and letters denote similar items in the following figures. Therefore, once an item is defined in one figure, it need not be further defined or explained in subsequent figures. In the description of the embodiments of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are typically positioned in the orientations or positional relationships of the inventive product during use. These terms are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation, and are therefore not to be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used solely to distinguish descriptions and are not to be construed as indicating or implying relative importance.

[0031] Furthermore, the use of terms such as "horizontal" and "vertical" does not necessarily imply that the component must be absolutely horizontal or vertical, but rather that it can be slightly tilted. For example, "horizontal" simply refers to a direction that is more horizontal than "vertical," not that the structure or component must be perfectly horizontal, but rather that it can be slightly tilted.

[0032] In the description of the embodiments of the present invention, "a plurality of" means at least two.

[0033] In the description of the embodiments of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0034] Example

[0035] Please refer to the instruction manual Figures 1 to 4 As shown in the instruction manual, Figures 1 to 4The present invention is a movable drive motor EMC dynamometer, which includes a frame 1. The frame 1 is a rectangular parallelepiped structure. The frame is composed of a frame welded with 45 steel and a stainless steel plate encapsulated on the outside and top of the frame. It should be noted that the stainless steel plate is fixed to the frame by bolts for easy disassembly and assembly. In order to improve the shielding effect, the front of the frame 1 is provided with ferrite absorbing bricks 11; to facilitate the position movement of the frame 1, the bottom of the frame 1 is provided with Forma casters 12, and the Forma casters 12 have four, which are fixedly arranged at the bottom four corners of the frame 1 respectively; refer to the attached manual for details. Figure 5 As shown, the interior of the frame 1 is provided with a support device 7 that can move up and down, and an eddy current dynamometer 6 is fixed on the support device 7. The height of the eddy current dynamometer 6 can be adjusted by the support device 7. It should be noted that the eddy current dynamometer 6 in the technical solution of the present invention cannot rotate actively and is used to provide loading resistance. The main purpose is to measure the loaded mode of the new energy drive motor and simulate the comprehensive resistance such as rolling resistance and wind resistance during driving; refer to the appendix of the specification Figure 7 and 8 The cam 73 is fixed to the frame 1 and the support 71 is fixed to the frame 1. The cam 73 is fixed to the frame 1 and the support 71 is fixed to the frame 1. Figure 9 As shown, the eddy current dynamometer 6 is fixed to the motor mounting base 71 by bolts, and disassembly and assembly are also relatively convenient; in order to limit the position of the motor mounting base 71, a connecting groove 711 is provided on the motor mounting base 71 corresponding to one end of the height adjustment support plate 73, and the connecting groove 711 has at least two, which are symmetrically arranged on the height adjustment support plate 73 near the two sides, and the connecting groove 711 corresponds to the height adjustment support plate 73 up and down. One end of the height adjustment rod 74 is axially connected to the connecting groove 711, and the other end passes through the height adjustment support plate 73 upward and is limited by the adjusting nut 742 arranged on the top of the height adjustment support plate 73. For details, please refer to the attached manual. Figure 7As shown, in order to facilitate the height adjustment of the height adjustment rod 74 on the height adjustment support plate 73, the height adjustment rod 74 is composed of an adjusting screw 741 and a ball joint 743 welded to the bottom of the adjusting screw 741. The ball joint 743 is axially connected to the connecting groove 711 through a pin shaft 75. The height adjustment support plate 73 is provided with a guide connection hole 731 communicating with each other up and down. The adjusting screw 741 is vertically inserted into the guide connection hole 731. By adjusting the height position of the height adjustment rod 74 on the height adjustment support plate 73, the height adjustment rod 74 can be adjusted to a desired height. The height position of the motor mounting base 71 swings; in order to limit the position of the height adjustment rod 74 on the motor mounting base 71, the adjusting nut 742 is threadedly matched with the adjusting screw 741, which is screwed onto the adjusting screw 741 at a position above the height adjustment support plate 73, and the adjusting nut 742 is pressed against the top surface of the motor mounting base 71 to achieve the height position of the adjusting screw 741 screwed thereto; a large pulley 53 fixedly connected to the transmission shaft end of the eddy current dynamometer 6 is provided, and the large pulley 53 is close to the rear end of the frame 1; refer to the attached manual for details. Figure 5 As shown, a support frame 4 is provided at the top of the rack 1 near the rear side, and a workbench 2 is provided at the top of the rack 1 at the front end of the support frame 4. It should be noted that an assembly port that matches the outline structure of the workbench 2 is provided on the top of the rack 1. The workbench 2 is a rectangular plate-shaped structure that is embedded in the assembly port on the top of the rack 1. A sample mounting plate 21 and a sensor bracket 33 that can move forward and backward are provided on the workbench 2. See the appendix of the instruction manual for details. Figure 5 As shown, the sensor bracket 33 is located between the sample mounting plate 21 and the support frame 4; in order to facilitate the installation of the workbench 2 on the frame 1, refer to the appendix of the manual. Figure 5 and 6As shown, a reinforcing support rod 200 is welded on the top of the frame 1. The reinforcing support rod 200 is arranged in the assembly port on the top of the frame 1. There are multiple reinforcing support rods 200, and the multiple reinforcing support rods 200 are arranged in parallel at equal intervals front and back. The workbench 2 is fixedly connected to the top of the reinforcing support rod 200 by bolts. It should be noted that the top surface of the workbench 2 is flush with the top surface of the frame 1; in order to facilitate the front and rear position adjustment of the sample mounting plate 21 and the sensor bracket 3 on the workbench 2, and to facilitate the assembly of drive motors of different specifications, the workbench 2 is provided with multiple inverted T-shaped strips running through it along its front and rear length direction. The sample mounting plate 21 and the sensor bracket 33 are fixed to the workbench 2 by T-bolts that cooperate with the inverted T-slot 20. Specifically, the T-bolts are inserted into the inverted T-slot 20, with the screw portion thereof pointing vertically upward, passing through the fixing holes preset on the sample mounting plate 21 and the sensor bracket 33, and fixing the corresponding sample mounting plate 21 and the sensor bracket 33 to the workbench 2 respectively by nuts that cooperate with the threads thereof. By loosening the nuts, the sample mounting plate 21 and the sensor bracket 33 can be moved linearly back and forth on the top of the workbench 2 through the corresponding T-bolts to adjust their positions. Figure 1 、 2 As shown in FIG5 , a torque sensor 3 is fixedly connected to the top of the sensor bracket 33. The torque sensor 3 is longitudinally arranged front to back, and a first coupling 31 is fixedly arranged at its front end for transmission connection therewith. The first coupling 31 corresponds to the front and back of the sample mounting plate 21. In order to facilitate the installation and fixation of the drive motor to be tested on the sample mounting plate 21, and to facilitate the connection of the drive shaft of the drive motor with the first coupling 31, refer to the appendix of the manual. Figure 1 and 5 As shown, the end of the sample mounting plate 21 is provided with a sample mounting hole 211 connected front to back, and the end face center of the sample mounting hole 711 corresponds front to back to the end face center of the first coupling 31, and the transmission shaft of the drive motor can pass through the sample mounting hole 711 and be fixedly connected to the first coupling 31. In order to facilitate the connection and fixation of the drive motor on the sample mounting plate 21, the front of the sample mounting plate 21 is provided with a plurality of fixed connection holes in an array located on the periphery of the sample mounting hole 211. The drive motor to be tested can be fixedly connected to the sample mounting plate 21 by bolts and nuts that cooperate with each other. The axis of the drive motor is coaxial with the center of the first coupling 31 and is connected to each other; the rear end of the torque sensor 3 is fixedly provided with a second coupling 32 that is transmission-connected thereto; refer to the appendix of the instruction manual. Figure 5 and 6As shown, the support frame 4 is provided with a transmission shaft 41 movably connected thereto, and the transmission shaft 41 is longitudinally arranged front to back, and the transmission shaft 41 is movably connected to the support frame 4 through a bearing 42, and there are two bearings 42, which are respectively arranged at the front and rear sections of the support frame 4, and the two bearings 42 are symmetrically arranged front to back, and the front and rear ends of the transmission shaft 41 extend outside the front and rear ends of the support frame 4 respectively, wherein the front end of the bearing 42 is transmission-connected to the second coupling 32, and a coupling shield is provided on the outside of the second coupling 32, and the coupling shield is fixedly connected to the support frame 4 by screws; refer to the appendix of the instruction manual Figure 6 As shown, the rear end of the transmission shaft 41 is provided with a small pulley 51 fixedly connected thereto, and the small pulley 51 corresponds to the large pulley 53 up and down, and is connected thereto by a transmission belt 52; it should be noted that the small pulley 51 and the transmission shaft 41, as well as the large pulley 53 and the transmission shaft of the eddy current dynamometer 6, are fixedly connected by bolts, which are convenient for disassembly and replacement. During actual work, the small pulley 51 and the large pulley 53 are swapped up and down to achieve the effect of deceleration or torque increase.

[0036] In order to ensure the electromagnetic shielding effect of the equipment, please refer to the attached manual. Figure 5 As shown, the small pulley 51 is provided with a pulley protection cover 5 on the outside; Figure 1 、 2 As shown in FIG4 , two longitudinally arranged front-to-back slide rails 13 are set on the top of the frame 1, the rear end of the slide rail 13 is close to the rear end of the frame 1, and the front end is close to the middle part of the side of the workbench 2. The two slide rails 13 are symmetrically arranged at the top of the frame 1 near the left and right sides, and the slide rails 13 are provided with sliders 131 connected to the slide rails for sliding back and forth. It should be noted that each of the slide rails 13 is provided with two sliders 131, and the sliders 131 of the two slide rails 13 are provided with protective covers fixedly connected to the sliders 131. The protective covers can move back and forth along the slide rails 13 with the sliders 131, and can be covered on the outside of the sample mounting plate 21 and the torque sensor 3, and will not interfere with the installation and disassembly of the drive motor on the sample mounting plate 21.

[0037] During operation, the drive motor to be tested is fixedly connected to the sample mounting plate 21 by bolts, the transmission shaft of the drive motor is fixedly connected to the first coupling 31, the loading resistance of the eddy current dynamometer 6 is set, and then the drive motor is powered on and started, and its transmission shaft drives the torque sensor 3 through the first coupling 31, and drives the second coupling 32 to rotate through the torque sensor 3, and the second coupling 32 drives the transmission shaft 41 connected thereto to rotate, and the transmission shaft 41 drives the small pulley 51 to rotate synchronously, and the small pulley 51 drives the large pulley 53 to rotate through the transmission belt 52, and the large pulley 53 drives the eddy current dynamometer 6. The eddy current dynamometer 6 absorbs the torque and power output of the measured machine by utilizing the electromagnetic effect generated by the eddy current ring, and simulates the comprehensive resistance such as rolling resistance and wind resistance during driving by the loading resistance set by the eddy current dynamometer 6 to measure the load mode of the drive motor. Depending on the speed and torque required for the test, and the power of the eddy current dynamometer 6, the small pulley 51 and the large pulley 53 can be swapped or replaced to achieve the effect of deceleration or torque increase. It should be noted that, depending on the test requirements, the eddy current dynamometer 6 can be replaced with an asynchronous motor, and the large pulley 53 is fixedly mounted on the drive shaft of the asynchronous motor. The asynchronous motor has active rotation characteristics. In the asynchronous motor torque mode, it can perform load testing like the eddy current dynamometer 6. At the same time, because the asynchronous motor can actively rotate, it can drive the new energy drive motor to rotate, which is equivalent to performing a power generation condition test when the car is decelerating.

[0038] When replacing the small pulley 51 and the large pulley 53, remove the pulley protective cover 5 and the stainless steel plate on the outside of the frame 1, then use a wrench to turn the adjusting nut 742 on the adjusting screw 741 to make the adjusting screw 741 rise. The adjusting screw 741 pulls one end of the motor mounting base 71 connected to its shaft through the ball joint 743 to lift up. The motor mounting base 71 drives the eddy current dynamometer 6 on its top to rise synchronously. At this time, the pulley tension becomes loose, and then the transmission belt 52 can be removed. After the transmission belt 52 is removed, the small pulley 51 and the large pulley 53 are removed. A small pulley 51 or a large pulley 53 of the required specifications is installed on the transmission shaft 41 and the transmission shaft of the eddy current dynamometer 6, and then the transmission belt 52 is sleeved on the outside of the small pulley 51 and the large pulley 53. Then, the adjusting nut 742 is rotated again with a wrench to lower the adjusting screw 741. Synchronously, the driving motor installed on the motor mounting base 71 is lowered synchronously. When the tension of the transmission belt 52 reaches a suitable state, it stops. By replacing the small pulley 51 and the large pulley 53 to achieve the effect of deceleration or torque increase, finally, the side stainless steel plate and the pulley guard 5 are reinstalled.

[0039] This portable drive motor EMC dynamometer can perform EMC tests on electric drive systems efficiently and quickly. It has a simple structure, stable operation, and easy use and maintenance. The small pulley and large pulley can be replaced as needed to achieve transmission with different gear ratios. It has a wide input speed range and can be used for type tests of various motors and power machinery such as variable frequency speed regulation. It can measure the output torque and speed of the tested drive motor to obtain the output power; the large and small pulleys can be replaced to achieve the effect of deceleration or torque increase; and it can achieve high speed and high torque load.

[0040] It should be emphasized that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A portable drive motor EMC dynamometer, characterized by: The invention comprises a frame (1), wherein the bottom of the frame (1) is provided with a Forma caster (12), and a support device (7) capable of moving up and down is provided inside the frame (1); an eddy current dynamometer (6) is fixed on the support device (7), and the height of the eddy current dynamometer (6) can be adjusted by the support device (7); a large pulley (53) fixedly connected to the eddy current dynamometer (6) is provided on the transmission shaft end of the eddy current dynamometer (6), and the large pulley (53) is close to the rear end of the frame (1); a support frame (4) is provided at the top of the frame (1) near the rear side; a workbench (2) is provided at the top of the frame (1) at the front end of the support frame (4); a sample mounting plate (21) capable of moving forward and backward and a sensor bracket (33) are provided on the workbench (2), and the sensor bracket (33) is located between the sample mounting plate (21) and the support frame (4). The top of the sensor bracket (33) is provided with a torque sensor (3) fixedly connected thereto; the torque sensor (3) is arranged longitudinally front to back, and a first coupling (31) is fixedly provided at its front end for transmission connection therewith, and the first coupling (31) corresponds to the sample mounting plate (21) front to back; the rear end of the torque sensor (3) is fixedly provided with a second coupling (32) for transmission connection therewith; the support frame (4) is provided with a transmission shaft (41) movably connected thereto, and the transmission shaft (41) is arranged longitudinally front to back, and its front end is transmission connected to the second coupling (32); the rear end of the transmission shaft (41) is provided with a small pulley (51) fixedly connected thereto, and the small pulley (51) corresponds to the large pulley (53) up and down, and they are transmission connected via a transmission belt (52).

2. The portable drive motor EMC dynamometer according to claim 1, characterized in that: The support device (7) is composed of a motor mounting base plate (71), a side connecting plate (72), a height adjustment support plate (73) and a height adjustment rod (74); the side connecting plate (72) and the height adjustment support plate (73) are fixedly welded in the frame (1); one end of the motor mounting base plate (71) is hingedly connected to the side connecting plate (72), and the top of the other end corresponds to the bottom of the height adjustment support plate (73) in upper and lower directions; the eddy current dynamometer (6) is fixed on the motor mounting base plate (71); a connecting groove (711) is provided on the motor mounting base plate (71) at one end corresponding to the height adjustment support plate (73), and the connecting groove (711) corresponds to the height adjustment support plate (73) in upper and lower directions; one end of the height adjustment rod (74) is axially connected to the connecting groove (711), and the other end passes through the height adjustment support plate (73) upward and is limited by an adjusting nut (742) provided on the top of the height adjustment support plate (73).

3. The portable drive motor EMC dynamometer according to claim 2, characterized in that: The height adjustment rod (74) is composed of an adjustment screw (741) and a ball joint (743) fixedly welded to the bottom of the adjustment screw (741). The ball joint (743) is axially connected to the connecting groove (711) through a pin (75). The height adjustment support plate (73) is provided with a guide connection hole (731) that is connected to the upper and lower parts. The adjustment screw (741) is vertically inserted into the guide connection hole (731). The adjustment nut (742) is threadedly matched with the adjustment screw (741) and is screwed to the position of the adjustment screw (741) located above the height adjustment support plate (73).

4. The portable drive motor EMC dynamometer according to claim 1, characterized in that: The end of the sample mounting plate (21) is provided with a sample mounting hole (211) connected front to back, and the end face center of the sample mounting hole (711) corresponds front to back to the end face center of the first coupling (31); the front of the sample mounting plate (21) is provided with a plurality of fixed connection holes in an array located on the periphery of the sample mounting hole (211).

5. The portable drive motor EMC dynamometer according to claim 1, characterized in that: The transmission shaft (41) and the support frame (4) are movably connected via a bearing (42).

6. The portable drive motor EMC dynamometer according to claim 1, characterized in that: A reinforcing support rod (200) is welded to the top of the frame (1), and the reinforcing support rod (200) has multiple pieces, which are arranged in parallel at equal intervals in front and back. The workbench (2) is fixedly connected to the top of the reinforcing support rod (200) by bolts; the workbench (2) is provided with multiple inverted T-shaped slots (20) running through the front and back along its front and back length directions, and the sample mounting plate (21) and the sensor bracket (33) are fixed to the workbench (2) by T-shaped bolts matching the inverted T-shaped slots (20).

7. The portable drive motor EMC dynamometer according to claim 1, characterized in that: Ferrite wave-absorbing bricks (11) are provided on the front of the frame (1).

8. The portable drive motor EMC dynamometer according to claim 1, characterized in that: The top of the frame (1) is provided with two longitudinally arranged slide rails (13), the two slide rails (13) being symmetrically arranged at positions near the left and right sides of the top of the frame (1), the slide rails (13) being provided with sliders (131) connected to the slide rails for sliding forward and backward, the sliders (131) of the two slide rails (13) being provided with protective covers fixedly connected to the sliders (131), the protective covers being able to move forward and backward along with the sliders (131), and being able to cover the outside of the sample mounting plate (21) and the torque sensor (3).

9. The portable drive motor EMC dynamometer according to claim 1, characterized in that: A pulley protection cover (5) is provided outside the small pulley (51).

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