Special dynamometer system for electromagnetic compatibility laboratory

Abstract

The invention, which relates to the technical field of the dynamometer system, discloses a dynamometer system specially used for an electromagnetic compatibility laboratory, comprising a dynamometer control module, a power supply filtering module, a laser control module and an anti-interference module. An electric signal driving control module of an original dynamometer is changed, an optical signal transmission mode of a laser fiber is adopted for control, electromagnetic noise exceeding caused by transmission of an electric signal is avoided, and meanwhile the electromagnetic field interference resistance is improved; the power filter device is used for conducting electromagnetic disturbance suppression, interference of a power line is prevented from being transmitted from control to a test laboratory, and electromagnetic noise interference caused by a power supply line is reduced. The system has the advantages that the anti-interference performance is good, and the EMC on-load test requirement of the new energy electric drive electrical system can be met.

Description

Technical Field

[0001] The invention belongs to the technical field of dynamometer systems, and in particular relates to a dynamometer system specially used in an electromagnetic compatibility laboratory. Background Art

[0002] In new energy vehicles, the electric drive electrical system (including drive motors, motor controllers, etc.) is a core component. Electromagnetic compatibility (EMC) load testing is essential to ensure that the electromagnetic performance of these systems meets the requirements in actual working environments. With the rapid development of new energy vehicles, the power density of the electric drive system continues to increase, and the electromagnetic interference it generates may affect the normal operation of other electronic equipment in the vehicle. Therefore, the existing technology uses a dynamometer system to perform electromagnetic compatibility experiments on new energy vehicles.

[0003] However, the dynamometer system of the prior art has the following problems: 1. The electromagnetic disturbance noise signal strength of the existing dynamometer system is high, which does not meet the low noise requirements of the electromagnetic compatibility test system for test equipment; 2. The existing dynamometer system has a weak ability to resist electromagnetic interference and does not meet the requirements of the electromagnetic compatibility test system for the ability to withstand electromagnetic fields.

[0004] Based on the above reasons, the present invention proposes a dynamometer system specifically used in an electromagnetic compatibility laboratory to solve the deficiencies in the prior art. Summary of the invention

[0005] The purpose of the present invention is to provide a dynamometer system specially used in an electromagnetic compatibility laboratory in view of the problem that the existing dynamometer system cannot meet the requirements of electromagnetic compatibility testing.

[0006] The present invention is realized by the following technical scheme: a dynamometer system specially used in an electromagnetic compatibility laboratory, comprising: Dynamometer control module, used to adjust and control various parameters of the dynamometer, so as to realize electromagnetic compatibility experiment; The power filter module filters the output power of the dynamometer control module to reduce the electromagnetic noise interference of the power supply line; Laser control module, which uses laser to transmit the control signal sent by the dynamometer control module, reducing the excessive electromagnetic noise of electrical signal transmission; Anti-interference module, which improves the anti-interference performance of the dynamometer system based on external devices, thereby improving the compatibility of the system;

[0007] Preferably, the dynamometer control module, the power filter module and the laser control module are all arranged inside an electromagnetic compatibility control room, and the anti-interference module is installed in an anechoic chamber.

[0008] Preferably, a power filter is provided inside the power filter module, and the power filter suppresses conducted electromagnetic disturbances to avoid interference from the power line from being transmitted from the control to the test laboratory.

[0009] Preferably, the laser control module is controlled by optical signal transmission of laser optical fiber, thereby avoiding excessive electromagnetic noise caused by the transmission of electrical signals and increasing the ability to resist electromagnetic field interference.

[0010] Preferably, the anti-interference module includes a dynamometer base and a metal shielding cavity; The dynamometer base is used to fix the dynamometer and absorb electromagnetic waves, and the dynamometer base is made of a polymer manganese-zinc compound material; The metal shielding cavity is used to perform shielding operation on the dynamometer to reduce electromagnetic field interference to the dynamometer, and the metal shielding cavity complies with the Faraday cage effect design.

[0011] Preferably, the method for using the dynamometer system comprises the following steps: Step 1: The dynamometer is fixedly mounted on the dynamometer base, and the metal shielding cavity is sleeved outside the dynamometer, and the metal shielding cavity is fixedly mounted between the metal shielding cavity and the dynamometer base, a laser control module is installed at the signal output end of the dynamometer control module, and a power supply filter module is installed on the input power supply of the dynamometer; Step 2: The power filter module is used to suppress the conducted electromagnetic disturbance of the power line to prevent the interference of the power line from being transmitted from the control to the test laboratory. The dynamometer control module outputs the signal for controlling the torque and speed of the dynamometer. The signal is transmitted through the laser optical fiber and is responsible for adjusting the working state of the motor to ensure the stability and repeatability during the test process. Step 3: Use designated equipment to detect and collect the electromagnetic compatibility test conditions and data of the dynamometer system to complete the electromagnetic compatibility test of the dynamometer system.

[0012] Compared with the prior art, the present invention has the following advantages: 1. The present invention changes the original electric signal drive control module of the dynamometer and adopts the optical signal transmission mode of laser optical fiber to control, thereby avoiding excessive electromagnetic noise caused by the transmission of electric signals and increasing the ability to resist electromagnetic field interference; 2. The present invention adopts a power filter device to suppress conducted electromagnetic disturbance, thereby preventing interference from the power line from being transmitted from the control to the test laboratory, and reducing electromagnetic noise interference caused by the power supply line; 3. The present invention is provided with an anti-interference module, and the dynamometer base is made of a polymer manganese-zinc compound material. The polymer manganese-zinc compound has a high electromagnetic wave absorption rate, which can reduce the excessive electromagnetic noise caused by the electromagnetic wave reflection of the installation base. In addition, by installing a metal shielding cover cavity designed to comply with the Faraday cage effect, on the one hand, the electromagnetic interference of the dynamometer can be avoided from being emitted to the outside, and on the other hand, the dynamometer can be protected from interference with the electromagnetic field. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a block diagram of a dynamometer system used in electromagnetic compatibility laboratories; Figure 2 It is a schematic diagram of the three-dimensional structure of the metal shielding cavity. DETAILED DESCRIPTION

[0014] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in 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. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0015] Example: See also Figure 1 and Figure 2 , a dynamometer system dedicated to electromagnetic compatibility laboratories, including: The dynamometer control module is used to adjust and control various parameters of the dynamometer, thereby realizing electromagnetic compatibility experiments; The power filter module filters the output power of the dynamometer control module to reduce electromagnetic noise interference of the power supply line; Furthermore, a power filter is provided inside the power filter module, and the power filter suppresses conducted electromagnetic disturbances to avoid interference from the power line from being transmitted from the control to the test laboratory, thereby reducing electromagnetic noise interference caused by the power supply line.

[0016] The laser control module uses laser to transmit the control signal sent by the dynamometer control module, thereby reducing the excessive electromagnetic noise of the electrical signal transmission; Furthermore, the laser control module is controlled by an optical signal transmission method of a laser optical fiber, thereby avoiding excessive electromagnetic noise caused by the transmission of electrical signals and increasing the ability to resist electromagnetic field interference.

[0017] The anti-interference module improves the anti-interference performance of the dynamometer system based on external devices, thereby improving the compatibility of the system; Further, the anti-interference module includes a dynamometer base and a metal shielding cavity; The dynamometer base is used to fix the dynamometer and absorb electromagnetic waves, and the dynamometer base is made of a polymer manganese-zinc compound material. The polymer manganese-zinc compound has the characteristic of high electromagnetic wave absorption rate, which can reduce the excessive electromagnetic noise caused by the electromagnetic wave reflection of the installation base; The metal shielding cavity is used to shield the dynamometer and reduce the electromagnetic field interference to the dynamometer. The metal shielding cavity complies with the Faraday cage effect design. On the one hand, it can prevent the electromagnetic interference of the dynamometer from being emitted to the outside, and on the other hand, it can also protect the dynamometer from the interference of the electromagnetic field.

[0018] The dynamometer control module, power filter module and laser control module are all arranged inside the electromagnetic compatibility control room, and the anti-interference module is installed in the anechoic room.

[0019] The working process and beneficial effects of the present invention are as follows: Step 1: The dynamometer is fixedly installed on the dynamometer base. The dynamometer base is made of a polymer manganese-zinc compound material. The polymer manganese-zinc compound has a high electromagnetic wave absorption rate, which can reduce the excessive electromagnetic noise caused by the electromagnetic wave reflection of the installation base; and a metal shielding cavity is set on the outside of the dynamometer, and the metal shielding cavity and the dynamometer base are fixedly installed. On the one hand, the electromagnetic interference of the dynamometer can be avoided from being emitted to the outside, and on the other hand, the dynamometer can be protected from interference of the electromagnetic field. A laser control module is installed at the signal output end of the dynamometer control module, and a power filter module is installed on the input power supply of the dynamometer; Step 2: Use the power filter module to suppress the conducted electromagnetic disturbance of the power line to avoid the interference of the power line from being transmitted from the control to the test laboratory, and reduce the electromagnetic noise interference caused by the power supply line; and output the signal for controlling the torque and speed of the dynamometer through the dynamometer control module. The signal is transmitted through the laser optical fiber and is responsible for adjusting the working state of the motor, avoiding the excessive electromagnetic noise caused by the transmission of electrical signals, and at the same time increasing the ability to resist electromagnetic field interference, ensuring the stability and repeatability during the test; Step 3: Use designated equipment to detect and collect the electromagnetic compatibility test conditions and data of the dynamometer system to complete the electromagnetic compatibility test of the dynamometer system.

[0020] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions. The sentence "includes an element defined by ... does not exclude the existence of other identical elements in the process, method, article or device including the element".

[0021] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A dynamometer system dedicated to electromagnetic compatibility laboratories, Features: include: The dynamometer control module is used to adjust and control various parameters of the dynamometer, thereby realizing electromagnetic compatibility experiments; The power filter module filters the output power of the dynamometer control module to reduce electromagnetic noise interference of the power supply line; The laser control module uses laser to transmit the control signal sent by the dynamometer control module, thereby reducing the excessive electromagnetic noise of the electrical signal transmission; The anti-interference module improves the anti-interference performance of the dynamometer system based on external devices, thereby improving the compatibility of the system; The dynamometer control module, power filter module and laser control module are all arranged inside the electromagnetic compatibility control room, and the anti-interference module is installed in the anechoic room.

2. A dynamometer system specially used in an electromagnetic compatibility laboratory according to claim 1, It is characterized in that The power filter module is internally provided with a power filter, and the power filter suppresses conducted electromagnetic disturbances to prevent interference from the power line from being transmitted from the control to the test laboratory.

3. A dynamometer system specially used in an electromagnetic compatibility laboratory according to claim 2, It is characterized in that The laser control module is controlled by an optical signal transmission method of a laser optical fiber, thereby avoiding excessive electromagnetic noise caused by the transmission of electrical signals and increasing the ability to resist electromagnetic field interference.

4. A dynamometer system specially used in an electromagnetic compatibility laboratory according to claim 3, It is characterized in that The anti-interference module includes a dynamometer base and a metal shielding cavity; The dynamometer base is used to fix the dynamometer and absorb electromagnetic waves, and the dynamometer base is made of a polymer manganese-zinc compound material; The metal shielding cavity is used to perform shielding operation on the dynamometer to reduce electromagnetic field interference to the dynamometer, and the metal shielding cavity complies with the Faraday cage effect design.

5. A dynamometer system specially used in an electromagnetic compatibility laboratory according to claim 4, It is characterized in that The method for using the dynamometer system comprises the following steps: Step 1: The dynamometer is fixedly mounted on the dynamometer base, and the metal shielding cavity is sleeved outside the dynamometer, and the metal shielding cavity is fixedly mounted between the metal shielding cavity and the dynamometer base, a laser control module is installed at the signal output end of the dynamometer control module, and a power supply filter module is installed on the input power supply of the dynamometer; Step 2: The power filter module is used to suppress the conducted electromagnetic disturbance of the power line to prevent the interference of the power line from being transmitted from the control to the test laboratory. The dynamometer control module outputs the signal for controlling the torque and speed of the dynamometer. The signal is transmitted through the laser optical fiber and is responsible for adjusting the working state of the motor to ensure the stability and repeatability during the test process. Step 3: Use designated equipment to detect and collect the electromagnetic compatibility test conditions and data of the dynamometer system to complete the electromagnetic compatibility test of the dynamometer system.

Images