Electromagnetic safety testing device

Abstract

The utility model aims to provide an electromagnetic safety testing device which can find potential design risks in advance, eliminate potential safety hazards, shorten the development period of a whole vehicle, simulate mechanical load conditions of an electric driving system in actual operation and simulate the operation condition of the electric driving system on a road. The device comprises a first base and a second base located in an anechoic chamber, a motor dynamometer is arranged on the upper surface of the first base, a tested motor is arranged on the upper surface of the second base, and an output shaft of the motor dynamometer is in transmission connection with the tested motor through an insulation transmission shaft. The utility model is applied to the technical field of new energy electric driving systems.

Description

Technical Field

[0001] The utility model is applied to the technical field of new energy electric drive systems, and particularly relates to an electromagnetic safety testing device. Background Art

[0002] At present, the design and testing applied to the electromagnetic compatibility of new energy electric drive systems can well simulate the load conditions of the electric drive system during normal operation, flexibly and conveniently set the loading conditions of the electric drive system, study the electromagnetic compatibility performance of the electric drive system at different speeds or torques, and well simulate the load conditions of the electric drive system running on real roads. If the test is carried out during the research and development stage of the vehicle components, the electromagnetic safety performance of the electric drive system can be tested and verified, and potential problem points can be presented in the early stage of research and development, avoiding rectification in the later stage of vehicle development, thereby reducing rectification costs and shortening the development cycle.

[0003] The electric drive system of new energy electric vehicles is the core unit of electric vehicle power output. When working under high voltage and high current conditions, the rapid changes in voltage and current will cause a large number of interference signals, which are the main source of interference for electric vehicles. The interference signals generated by the electric drive system are transmitted to various components of the vehicle through conduction or radiation, which poses serious electromagnetic safety risks. Practical applications show that the electromagnetic interference emission of the motor, the core unit of the electric drive system, is closely related to the load carried by the motor. The greater the load of the motor, the greater the torque and power output of the motor, the greater the power consumed by the motor, and the more serious the electromagnetic interference of the motor, which leads to an increase in electromagnetic safety risks. Therefore, it is necessary to simulate the loading conditions of the motor under laboratory conditions, unify the load conditions of the motor, form unified test evaluation conditions, and effectively evaluate the electromagnetic safety risks of the motor under loading conditions.

[0004] At present, the electromagnetic compatibility test of the electric drive system of new energy electric vehicles is based on the test of the electric drive system under standby conditions or no-load operating conditions. The state of the electric drive under standby conditions and no-load operating conditions is very different from that under operating conditions. The problems that occur under operating conditions cannot be reproduced under standby conditions and no-load operating conditions. The working state of the electric drive system in the whole vehicle cannot be well simulated, and effective test data cannot be provided for development and research. Electromagnetic safety problems of the electric drive system are prone to occur, and electromagnetic safety problems can not be discovered until the late stage of vehicle development, which requires large-scale resumption of work, and at the same time brings higher costs, and may even subvert early designs and delay development time.

[0005] At present, laboratory tests on the electromagnetic safety performance of electric vehicle electric drive systems are mainly conducted under no-load conditions. The load conditions of the electric drive system under test are very different from those under actual operation on the road. The voltage and current of the electric drive system under test are too different from the electrical parameters under actual working conditions. The test results in the laboratory cannot reproduce the test results under actual working conditions well, and the test data cannot provide valuable reference for development. Therefore, it is necessary to provide an electromagnetic safety test device that can detect potential design risks in advance, eliminate safety hazards, shorten the development cycle of the entire vehicle, simulate the mechanical load conditions of the electric drive system during actual operation, and simulate the operation of the electric drive system on the road. Utility Model Content

[0006] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide an electromagnetic safety testing device that can detect potential design risks in advance, eliminate safety hazards, shorten the development cycle of the whole vehicle, simulate the mechanical load conditions of the actual operation of the electric drive system, and simulate the operation conditions of the electric drive system on the road.

[0007] The technical solution adopted by the utility model is: the utility model comprises a first base and a second base located in an anechoic chamber, a motor dynamometer is arranged on the upper surface of the first base, a motor to be measured is arranged on the upper surface of the second base, and the output shaft of the motor dynamometer is transmission-connected to the motor to be measured through an insulating transmission shaft.

[0008] It can be seen from the above scheme that the present application can realize electromagnetic safety testing of the electric drive system under loading conditions, can well simulate the mechanical load conditions of the electric drive system during actual operation, can well simulate the operation of the electric drive system on the road in the laboratory, and can test the electromagnetic safety of the whole vehicle at the automotive parts stage, discover potential design risks in advance, shorten the development cycle of the whole vehicle, and can be widely used in related production enterprises and testing institutions.

[0009] A preferred solution is that bearing seats are provided at both ends of the insulating transmission shaft, and the bearing seats are connected to the output shaft of the motor dynamometer and the output shaft of the motor to be tested.

[0010] A preferred solution is that the first base and the second base both include an upper iron base and a lower iron base, and the upper iron base is connected to the lower iron base via an insulating spacer.

[0011] A preferred solution is that an L-shaped mounting bracket is provided on the upper surface of the second base, and the motor dynamometer is transversely arranged at the vertical end of the L-shaped mounting bracket.

[0012] A preferred solution is that two groups of metal blocks are provided at the vertical end of the L-shaped mounting bracket, the metal blocks are perpendicular to the vertical end of the L-shaped mounting bracket, and the two groups of metal blocks are respectively provided on both sides of the motor dynamometer.

[0013] A preferred solution is that the electromagnetic safety testing device further includes a heat dissipation fan, and the heat dissipation fan is arranged at the upper end of the motor dynamometer.

[0014] A preferred solution is that a linear slide groove is provided on the upper surface of the second base, the sliding direction of the linear slide groove is parallel to the transmission direction of the insulating transmission shaft, and the bottom of the L-shaped mounting bracket is slidably matched with the linear slide groove.

[0015] A preferred solution is that the electromagnetic safety testing device also includes an axial adjustment module, which is arranged on the upper surface of the second base, and the axial adjustment module includes a handle and a screw rod, the transmission direction of the screw rod is parallel to the sliding direction of the linear slide groove, the handle is transmission-connected to the end of the screw rod, and the bottom of the L-shaped mounting bracket cooperates with the screw rod thread. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural diagram of the utility model;

[0017] Figure 2 It is the front view of the utility model;

[0018] Figure 3 It is a side view of the utility model. DETAILED DESCRIPTION

[0019] like Figure 1 As shown, in this embodiment, the utility model includes a first base 1 and a second base 2 located in an anechoic chamber, a motor dynamometer 3 is provided on the upper surface of the first base 1, a motor to be measured 4 is provided on the upper surface of the second base 2, and the output shaft of the motor dynamometer 3 is transmission-connected to the motor to be measured 4 via an insulating transmission shaft 5.

[0020] The motor dynamometer 3 is located in the equipment room outside the darkroom, and the second base 2 is located inside the darkroom, and is used to fix the motor 4 under test and the cable connecting the motor. The motor dynamometer 3 is used to apply a mechanical load to the motor under test. Under normal working conditions, the motor 4 under test is rigidly well connected to the motor dynamometer 3. When simulating the normal operating conditions of the electric drive system, the external test machine provides the speed based on the actual performance parameters of the motor 4 under test, and drives the motor 4 under test to rotate. The motor 4 under test outputs the rated torque, which can accurately simulate the load of the actual operation of the electric drive system, realize the simulation of the actual operating conditions of the electric drive system in the radio wave darkroom, create unified evaluation and testing conditions, and carry out electromagnetic safety testing research based on the electric drive system under loading conditions.

[0021] like Figure 1 As shown, in this embodiment, bearing seats 6 are provided at both ends of the insulating transmission shaft 5 , and the bearing seats 6 are connected to the output shaft of the motor dynamometer 3 and the output shaft of the motor 4 to be tested.

[0022] The bearing seat 6 is a maintenance-free bearing seat. The bearing seat 6 and the insulating transmission shaft 5 constitute an insulating shaft system. The insulating transmission shaft 5 is connected to a high-strength insulating shaft system through a maintenance-free bearing seat. The insulating shaft system can isolate the interference signal of the motor dynamometer 3 and cannot affect the shielding effectiveness of the darkroom. The insulating shaft system is located in the equipment room and the anechoic chamber, and transmits the output power of the motor dynamometer 3 to the anechoic chamber. The insulating transmission shaft system is connected to the transmission shaft inside the anechoic chamber through the bearing seat 6. The bearing seat 6 facilitates replacement of the transmission shaft according to the situation of the motor 4 under test, which is beneficial to improving the usability of the system. For example, when replacing different types of motors under test, no adjustment is required from the output shaft of the dynamometer motor to the shielded transmission shaft inside the darkroom. The transmission chain only needs to ensure the centering accuracy during installation and debugging.

[0023] like Figure 1 As shown, in this embodiment, the first base 1 and the second base 2 both include an upper iron base and a lower iron base, and the upper iron base is connected to the lower iron base through an insulating spacer 7. The insulating spacer 7 insulates the upper iron base from the lower iron base, thereby isolating interference from the ground.

[0024] like Figure 1 As shown, in this embodiment, an L-shaped mounting bracket 8 is provided on the upper surface of the second base 2, and the motor dynamometer 3 is transversely arranged at the vertical end of the L-shaped mounting bracket 8. The L-shaped mounting bracket 8 can meet the assembly requirements of the end-mounted motor.

[0025] like Figure 1As shown, in this embodiment, two groups of metal blocks 9 are provided at the vertical end of the L-shaped mounting bracket 8, and the metal blocks 9 are perpendicular to the vertical end of the L-shaped mounting bracket 8, and the two groups of metal blocks 9 are respectively provided on both sides of the motor dynamometer 3. The metal blocks 9 have a protective function to reduce the safety risk caused by the loosening of the screws of the transmission shaft.

[0026] like Figure 1 As shown, in this embodiment, the electromagnetic safety testing device further includes a heat dissipation fan 10, and the heat dissipation fan 10 is arranged at the upper end of the motor dynamometer 3. The heat dissipation fan 10 dissipates the heat of the motor dynamometer 3.

[0027] like Figure 1 As shown, in this embodiment, a linear slide groove 11 is provided on the upper surface of the second base 2, the sliding direction of the linear slide groove 11 is parallel to the transmission direction of the insulating transmission shaft 5, and the bottom of the L-shaped mounting bracket 8 is slidably matched with the linear slide groove 11. The linear slide groove 11 can meet the assembly requirements of installing the motor and can meet the requirements of motors with different shaft lengths.

[0028] like Figure 1 As shown, in this embodiment, the electromagnetic safety test device also includes an axial adjustment module, which is arranged on the upper surface of the second base 2, and includes a handle 12 and a screw 13. The transmission direction of the screw 13 is parallel to the sliding direction of the linear slide 11. The handle 12 is transmission-connected to the end of the screw 13, and the bottom of the L-shaped mounting bracket 8 is threadedly matched with the screw 13. The axial adjustment module can conveniently adjust the installation position of the motor, and the L-shaped mounting bracket 8 slides horizontally along the screw 13 when the handle 12 is turned, so as to meet the assembly requirements of installing the motor.

Claims

1. An electromagnetic safety testing device, characterized in that: It comprises a first base (1) and a second base (2) located in an anechoic chamber, wherein a motor dynamometer (3) is arranged on the upper surface of the first base (1), and a motor to be measured (4) is arranged on the upper surface of the second base (2), and an output shaft of the motor dynamometer (3) is transmission-connected to the motor to be measured (4) via an insulating transmission shaft (5).

2. An electromagnetic safety testing device according to claim 1, characterized in that: Both ends of the insulating transmission shaft (5) are provided with bearing seats (6), and the bearing seats (6) are connected to the output shaft of the motor dynamometer (3) and the output shaft of the motor (4) to be tested.

3. An electromagnetic safety testing device according to claim 1, characterized in that: The first base (1) and the second base (2) both comprise an upper iron base and a lower iron base, and the upper iron base is connected to the lower iron base via an insulating spacer (7).

4. The electromagnetic safety testing device according to claim 1, characterized in that: An L-shaped mounting bracket (8) is provided on the upper surface of the second base (2), and the motor dynamometer (3) is arranged transversely at the vertical end of the L-shaped mounting bracket (8).

5. An electromagnetic safety testing device according to claim 4, characterized in that: Two groups of metal stoppers (9) are arranged at the vertical end of the L-shaped mounting bracket (8), the metal stoppers (9) are perpendicular to the vertical end of the L-shaped mounting bracket (8), and the two groups of metal stoppers (9) are arranged on both sides of the motor dynamometer (3) respectively.

6. The electromagnetic safety testing device according to claim 1, characterized in that: The electromagnetic safety testing device further comprises a heat dissipation fan (10), wherein the heat dissipation fan (10) is arranged at the upper end of the motor dynamometer (3).

7. An electromagnetic safety testing device according to claim 4, characterized in that: A linear slide groove (11) is provided on the upper surface of the second base (2), the sliding direction of the linear slide groove (11) is parallel to the transmission direction of the insulating transmission shaft (5), and the bottom of the L-shaped mounting bracket (8) is slidably matched with the linear slide groove (11).

8. An electromagnetic safety testing device according to claim 7, characterized in that: The electromagnetic safety testing device further comprises an axial adjustment module, which is arranged on the upper surface of the second base (2), and comprises a handle (12) and a screw rod (13), wherein the transmission direction of the screw rod (13) is parallel to the sliding direction of the linear slide groove (11), the handle (12) is transmission-connected to the end of the screw rod (13), and the bottom of the L-shaped mounting bracket (8) is threadedly matched with the screw rod (13).

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